text: 
  /*
   * Copyright (C) Igor Sysoev
   * Copyright (C) Nginx, Inc.
   */
  
  
  #include <ngx_config.h>
  #include <ngx_core.h>
  #include <ngx_http.h>
  
  
  typedef struct {
      ngx_http_upstream_conf_t       upstream;
  
      ngx_str_t                      index;
  
      ngx_array_t                   *flushes;
      ngx_array_t                   *params_len;
      ngx_array_t                   *params;
      ngx_array_t                   *params_source;
      ngx_array_t                   *catch_stderr;
  
      ngx_array_t                   *fastcgi_lengths;
      ngx_array_t                   *fastcgi_values;
  
      ngx_hash_t                     headers_hash;
      ngx_uint_t                     header_params;
  
      ngx_flag_t                     keep_conn;
  
  #if (NGX_HTTP_CACHE)
      ngx_http_complex_value_t       cache_key;
  #endif
  
  #if (NGX_PCRE)
      ngx_regex_t                   *split_regex;
      ngx_str_t                      split_name;
  #endif
  } ngx_http_fastcgi_loc_conf_t;
  
  
  typedef enum {
      ngx_http_fastcgi_st_version = 0,
      ngx_http_fastcgi_st_type,
      ngx_http_fastcgi_st_request_id_hi,
      ngx_http_fastcgi_st_request_id_lo,
      ngx_http_fastcgi_st_content_length_hi,
      ngx_http_fastcgi_st_content_length_lo,
      ngx_http_fastcgi_st_padding_length,
      ngx_http_fastcgi_st_reserved,
      ngx_http_fastcgi_st_data,
      ngx_http_fastcgi_st_padding
  } ngx_http_fastcgi_state_e;
  
  
  typedef struct {
      u_char                        *start;
      u_char                        *end;
  } ngx_http_fastcgi_split_part_t;
  
  
  typedef struct {
      ngx_http_fastcgi_state_e       state;
      u_char                        *pos;
      u_char                        *last;
      ngx_uint_t                     type;
      size_t                         length;
      size_t                         padding;
  
      unsigned                       fastcgi_stdout:1;
      unsigned                       large_stderr:1;
  
      ngx_array_t                   *split_parts;
  
      ngx_str_t                      script_name;
      ngx_str_t                      path_info;
  } ngx_http_fastcgi_ctx_t;
  
  
  #define NGX_HTTP_FASTCGI_RESPONDER      1
  
  #define NGX_HTTP_FASTCGI_KEEP_CONN      1
  
  #define NGX_HTTP_FASTCGI_BEGIN_REQUEST  1
  #define NGX_HTTP_FASTCGI_ABORT_REQUEST  2
  #define NGX_HTTP_FASTCGI_END_REQUEST    3
  #define NGX_HTTP_FASTCGI_PARAMS         4
  #define NGX_HTTP_FASTCGI_STDIN          5
  #define NGX_HTTP_FASTCGI_STDOUT         6
  #define NGX_HTTP_FASTCGI_STDERR         7
  #define NGX_HTTP_FASTCGI_DATA           8
  
  
  typedef struct {
      u_char  version;
      u_char  type;
      u_char  request_id_hi;
      u_char  request_id_lo;
      u_char  content_length_hi;
      u_char  content_length_lo;
      u_char  padding_length;
      u_char  reserved;
  } ngx_http_fastcgi_header_t;
  
  
  typedef struct {
      u_char  role_hi;
      u_char  role_lo;
      u_char  flags;
      u_char  reserved[5];
  } ngx_http_fastcgi_begin_request_t;
  
  
  typedef struct {
      u_char  version;
      u_char  type;
      u_char  request_id_hi;
      u_char  request_id_lo;
  } ngx_http_fastcgi_header_small_t;
  
  
  typedef struct {
      ngx_http_fastcgi_header_t         h0;
      ngx_http_fastcgi_begin_request_t  br;
      ngx_http_fastcgi_header_small_t   h1;
  } ngx_http_fastcgi_request_start_t;
  
  
  static ngx_int_t ngx_http_fastcgi_eval(ngx_http_request_t *r,
      ngx_http_fastcgi_loc_conf_t *flcf);
  #if (NGX_HTTP_CACHE)
  static ngx_int_t ngx_http_fastcgi_create_key(ngx_http_request_t *r);
  #endif
  static ngx_int_t ngx_http_fastcgi_create_request(ngx_http_request_t *r);
  static ngx_int_t ngx_http_fastcgi_reinit_request(ngx_http_request_t *r);
  static ngx_int_t ngx_http_fastcgi_process_header(ngx_http_request_t *r);
  static ngx_int_t ngx_http_fastcgi_input_filter_init(void *data);
  static ngx_int_t ngx_http_fastcgi_input_filter(ngx_event_pipe_t *p,
      ngx_buf_t *buf);
  static ngx_int_t ngx_http_fastcgi_process_record(ngx_http_request_t *r,
      ngx_http_fastcgi_ctx_t *f);
  static void ngx_http_fastcgi_abort_request(ngx_http_request_t *r);
  static void ngx_http_fastcgi_finalize_request(ngx_http_request_t *r,
      ngx_int_t rc);
  
  static ngx_int_t ngx_http_fastcgi_add_variables(ngx_conf_t *cf);
  static void *ngx_http_fastcgi_create_loc_conf(ngx_conf_t *cf);
  static char *ngx_http_fastcgi_merge_loc_conf(ngx_conf_t *cf,
      void *parent, void *child);
  static ngx_int_t ngx_http_fastcgi_merge_params(ngx_conf_t *cf,
      ngx_http_fastcgi_loc_conf_t *conf, ngx_http_fastcgi_loc_conf_t *prev);
  
  static ngx_int_t ngx_http_fastcgi_script_name_variable(ngx_http_request_t *r,
      ngx_http_variable_value_t *v, uintptr_t data);
  static ngx_int_t ngx_http_fastcgi_path_info_variable(ngx_http_request_t *r,
      ngx_http_variable_value_t *v, uintptr_t data);
  static ngx_http_fastcgi_ctx_t *ngx_http_fastcgi_split(ngx_http_request_t *r,
      ngx_http_fastcgi_loc_conf_t *flcf);
  
  static char *ngx_http_fastcgi_pass(ngx_conf_t *cf, ngx_command_t *cmd,
      void *conf);
  static char *ngx_http_fastcgi_split_path_info(ngx_conf_t *cf,
      ngx_command_t *cmd, void *conf);
  static char *ngx_http_fastcgi_store(ngx_conf_t *cf, ngx_command_t *cmd,
      void *conf);
  #if (NGX_HTTP_CACHE)
  static char *ngx_http_fastcgi_cache(ngx_conf_t *cf, ngx_command_t *cmd,
      void *conf);
  static char *ngx_http_fastcgi_cache_key(ngx_conf_t *cf, ngx_command_t *cmd,
      void *conf);
  #endif
  
  static char *ngx_http_fastcgi_lowat_check(ngx_conf_t *cf, void *post,
      void *data);
  
  
  static ngx_conf_post_t  ngx_http_fastcgi_lowat_post =
      { ngx_http_fastcgi_lowat_check };
  
  
  static ngx_conf_bitmask_t  ngx_http_fastcgi_next_upstream_masks[] = {
      { ngx_string("error"), NGX_HTTP_UPSTREAM_FT_ERROR },
      { ngx_string("timeout"), NGX_HTTP_UPSTREAM_FT_TIMEOUT },
      { ngx_string("invalid_header"), NGX_HTTP_UPSTREAM_FT_INVALID_HEADER },
      { ngx_string("http_500"), NGX_HTTP_UPSTREAM_FT_HTTP_500 },
      { ngx_string("http_503"), NGX_HTTP_UPSTREAM_FT_HTTP_503 },
      { ngx_string("http_403"), NGX_HTTP_UPSTREAM_FT_HTTP_403 },
      { ngx_string("http_404"), NGX_HTTP_UPSTREAM_FT_HTTP_404 },
      { ngx_string("updating"), NGX_HTTP_UPSTREAM_FT_UPDATING },
      { ngx_string("off"), NGX_HTTP_UPSTREAM_FT_OFF },
      { ngx_null_string, 0 }
  };
  
  
  ngx_module_t  ngx_http_fastcgi_module;
  
  
  static ngx_command_t  ngx_http_fastcgi_commands[] = {
  
      { ngx_string("fastcgi_pass"),
        NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
        ngx_http_fastcgi_pass,
        NGX_HTTP_LOC_CONF_OFFSET,
        0,
        NULL },
  
      { ngx_string("fastcgi_index"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_str_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, index),
        NULL },
  
      { ngx_string("fastcgi_split_path_info"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_http_fastcgi_split_path_info,
        NGX_HTTP_LOC_CONF_OFFSET,
        0,
        NULL },
  
      { ngx_string("fastcgi_store"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_http_fastcgi_store,
        NGX_HTTP_LOC_CONF_OFFSET,
        0,
        NULL },
  
      { ngx_string("fastcgi_store_access"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE123,
        ngx_conf_set_access_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.store_access),
        NULL },
  
      { ngx_string("fastcgi_ignore_client_abort"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
        ngx_conf_set_flag_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.ignore_client_abort),
        NULL },
  
      { ngx_string("fastcgi_bind"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_http_upstream_bind_set_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.local),
        NULL },
  
      { ngx_string("fastcgi_connect_timeout"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_msec_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.connect_timeout),
        NULL },
  
      { ngx_string("fastcgi_send_timeout"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_msec_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.send_timeout),
        NULL },
  
      { ngx_string("fastcgi_send_lowat"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_size_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.send_lowat),
        &ngx_http_fastcgi_lowat_post },
  
      { ngx_string("fastcgi_buffer_size"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_size_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.buffer_size),
        NULL },
  
      { ngx_string("fastcgi_pass_request_headers"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
        ngx_conf_set_flag_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.pass_request_headers),
        NULL },
  
      { ngx_string("fastcgi_pass_request_body"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
        ngx_conf_set_flag_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.pass_request_body),
        NULL },
  
      { ngx_string("fastcgi_intercept_errors"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
        ngx_conf_set_flag_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.intercept_errors),
        NULL },
  
      { ngx_string("fastcgi_read_timeout"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_msec_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.read_timeout),
        NULL },
  
      { ngx_string("fastcgi_buffers"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE2,
        ngx_conf_set_bufs_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.bufs),
        NULL },
  
      { ngx_string("fastcgi_busy_buffers_size"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_size_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.busy_buffers_size_conf),
        NULL },
  
  #if (NGX_HTTP_CACHE)
  
      { ngx_string("fastcgi_cache"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_http_fastcgi_cache,
        NGX_HTTP_LOC_CONF_OFFSET,
        0,
        NULL },
  
      { ngx_string("fastcgi_cache_key"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_http_fastcgi_cache_key,
        NGX_HTTP_LOC_CONF_OFFSET,
        0,
        NULL },
  
      { ngx_string("fastcgi_cache_path"),
        NGX_HTTP_MAIN_CONF|NGX_CONF_2MORE,
        ngx_http_file_cache_set_slot,
        0,
        0,
        &ngx_http_fastcgi_module },
  
      { ngx_string("fastcgi_cache_bypass"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
        ngx_http_set_predicate_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.cache_bypass),
        NULL },
  
      { ngx_string("fastcgi_no_cache"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
        ngx_http_set_predicate_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.no_cache),
        NULL },
  
      { ngx_string("fastcgi_cache_valid"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
        ngx_http_file_cache_valid_set_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.cache_valid),
        NULL },
  
      { ngx_string("fastcgi_cache_min_uses"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_num_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.cache_min_uses),
        NULL },
  
      { ngx_string("fastcgi_cache_use_stale"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
        ngx_conf_set_bitmask_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.cache_use_stale),
        &ngx_http_fastcgi_next_upstream_masks },
  
      { ngx_string("fastcgi_cache_methods"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
        ngx_conf_set_bitmask_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.cache_methods),
        &ngx_http_upstream_cache_method_mask },
  
      { ngx_string("fastcgi_cache_lock"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
        ngx_conf_set_flag_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.cache_lock),
        NULL },
  
      { ngx_string("fastcgi_cache_lock_timeout"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_msec_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.cache_lock_timeout),
        NULL },
  
  #endif
  
      { ngx_string("fastcgi_temp_path"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
        ngx_conf_set_path_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.temp_path),
        NULL },
  
      { ngx_string("fastcgi_max_temp_file_size"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_size_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.max_temp_file_size_conf),
        NULL },
  
      { ngx_string("fastcgi_temp_file_write_size"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_size_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.temp_file_write_size_conf),
        NULL },
  
      { ngx_string("fastcgi_next_upstream"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
        ngx_conf_set_bitmask_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.next_upstream),
        &ngx_http_fastcgi_next_upstream_masks },
  
      { ngx_string("fastcgi_param"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE23,
        ngx_http_upstream_param_set_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, params_source),
        NULL },
  
      { ngx_string("fastcgi_pass_header"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_str_array_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.pass_headers),
        NULL },
  
      { ngx_string("fastcgi_hide_header"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_str_array_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.hide_headers),
        NULL },
  
      { ngx_string("fastcgi_ignore_headers"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_1MORE,
        ngx_conf_set_bitmask_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, upstream.ignore_headers),
        &ngx_http_upstream_ignore_headers_masks },
  
      { ngx_string("fastcgi_catch_stderr"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
        ngx_conf_set_str_array_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, catch_stderr),
        NULL },
  
      { ngx_string("fastcgi_keep_conn"),
        NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_FLAG,
        ngx_conf_set_flag_slot,
        NGX_HTTP_LOC_CONF_OFFSET,
        offsetof(ngx_http_fastcgi_loc_conf_t, keep_conn),
        NULL },
  
        ngx_null_command
  };
  
  
  static ngx_http_module_t  ngx_http_fastcgi_module_ctx = {
      ngx_http_fastcgi_add_variables,        /* preconfiguration */
      NULL,                                  /* postconfiguration */
  
      NULL,                                  /* create main configuration */
      NULL,                                  /* init main configuration */
  
      NULL,                                  /* create server configuration */
      NULL,                                  /* merge server configuration */
  
      ngx_http_fastcgi_create_loc_conf,      /* create location configuration */
      ngx_http_fastcgi_merge_loc_conf        /* merge location configuration */
  };
  
  
  ngx_module_t  ngx_http_fastcgi_module = {
      NGX_MODULE_V1,
      &ngx_http_fastcgi_module_ctx,          /* module context */
      ngx_http_fastcgi_commands,             /* module directives */
      NGX_HTTP_MODULE,                       /* module type */
      NULL,                                  /* init master */
      NULL,                                  /* init module */
      NULL,                                  /* init process */
      NULL,                                  /* init thread */
      NULL,                                  /* exit thread */
      NULL,                                  /* exit process */
      NULL,                                  /* exit master */
      NGX_MODULE_V1_PADDING
  };
  
  
  static ngx_http_fastcgi_request_start_t  ngx_http_fastcgi_request_start = {
      { 1,                                               /* version */
        NGX_HTTP_FASTCGI_BEGIN_REQUEST,                  /* type */
        0,                                               /* request_id_hi */
        1,                                               /* request_id_lo */
        0,                                               /* content_length_hi */
        sizeof(ngx_http_fastcgi_begin_request_t),        /* content_length_lo */
        0,                                               /* padding_length */
        0 },                                             /* reserved */
  
      { 0,                                               /* role_hi */
        NGX_HTTP_FASTCGI_RESPONDER,                      /* role_lo */
        0, /* NGX_HTTP_FASTCGI_KEEP_CONN */              /* flags */
        { 0, 0, 0, 0, 0 } },                             /* reserved[5] */
  
      { 1,                                               /* version */
        NGX_HTTP_FASTCGI_PARAMS,                         /* type */
        0,                                               /* request_id_hi */
        1 },                                             /* request_id_lo */
  
  };
  
  
  static ngx_http_variable_t  ngx_http_fastcgi_vars[] = {
  
      { ngx_string("fastcgi_script_name"), NULL,
        ngx_http_fastcgi_script_name_variable, 0,
        NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
  
      { ngx_string("fastcgi_path_info"), NULL,
        ngx_http_fastcgi_path_info_variable, 0,
        NGX_HTTP_VAR_NOCACHEABLE|NGX_HTTP_VAR_NOHASH, 0 },
  
      { ngx_null_string, NULL, NULL, 0, 0, 0 }
  };
  
  
  static ngx_str_t  ngx_http_fastcgi_hide_headers[] = {
      ngx_string("Status"),
      ngx_string("X-Accel-Expires"),
      ngx_string("X-Accel-Redirect"),
      ngx_string("X-Accel-Limit-Rate"),
      ngx_string("X-Accel-Buffering"),
      ngx_string("X-Accel-Charset"),
      ngx_null_string
  };
  
  
  #if (NGX_HTTP_CACHE)
  
  static ngx_keyval_t  ngx_http_fastcgi_cache_headers[] = {
      { ngx_string("HTTP_IF_MODIFIED_SINCE"), ngx_string("") },
      { ngx_string("HTTP_IF_UNMODIFIED_SINCE"), ngx_string("") },
      { ngx_string("HTTP_IF_NONE_MATCH"), ngx_string("") },
      { ngx_string("HTTP_IF_MATCH"), ngx_string("") },
      { ngx_string("HTTP_RANGE"), ngx_string("") },
      { ngx_string("HTTP_IF_RANGE"), ngx_string("") },
      { ngx_null_string, ngx_null_string }
  };
  
  #endif
  
  
  static ngx_path_init_t  ngx_http_fastcgi_temp_path = {
      ngx_string(NGX_HTTP_FASTCGI_TEMP_PATH), { 1, 2, 0 }
  };
  
  
  static ngx_int_t
  ngx_http_fastcgi_handler(ngx_http_request_t *r)
  {
      ngx_int_t                     rc;
      ngx_http_upstream_t          *u;
      ngx_http_fastcgi_ctx_t       *f;
      ngx_http_fastcgi_loc_conf_t  *flcf;
  
      if (r->subrequest_in_memory) {
          ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
                        "ngx_http_fastcgi_module does not support "
                        "subrequest in memory");
          return NGX_HTTP_INTERNAL_SERVER_ERROR;
      }
  
      if (ngx_http_upstream_create(r) != NGX_OK) {
          return NGX_HTTP_INTERNAL_SERVER_ERROR;
      }
  
      f = ngx_pcalloc(r->pool, sizeof(ngx_http_fastcgi_ctx_t));
      if (f == NULL) {
          return NGX_HTTP_INTERNAL_SERVER_ERROR;
      }
  
      ngx_http_set_ctx(r, f, ngx_http_fastcgi_module);
  
      flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
      if (flcf->fastcgi_lengths) {
          if (ngx_http_fastcgi_eval(r, flcf) != NGX_OK) {
              return NGX_HTTP_INTERNAL_SERVER_ERROR;
          }
      }
  
      u = r->upstream;
  
      ngx_str_set(&u->schema, "fastcgi://");
      u->output.tag = (ngx_buf_tag_t) &ngx_http_fastcgi_module;
  
      u->conf = &flcf->upstream;
  
  #if (NGX_HTTP_CACHE)
      u->create_key = ngx_http_fastcgi_create_key;
  #endif
      u->create_request = ngx_http_fastcgi_create_request;
      u->reinit_request = ngx_http_fastcgi_reinit_request;
      u->process_header = ngx_http_fastcgi_process_header;
      u->abort_request = ngx_http_fastcgi_abort_request;
      u->finalize_request = ngx_http_fastcgi_finalize_request;
      r->state = 0;
  
      u->buffering = 1;
  
      u->pipe = ngx_pcalloc(r->pool, sizeof(ngx_event_pipe_t));
      if (u->pipe == NULL) {
          return NGX_HTTP_INTERNAL_SERVER_ERROR;
      }
  
      u->pipe->input_filter = ngx_http_fastcgi_input_filter;
      u->pipe->input_ctx = r;
  
      u->input_filter_init = ngx_http_fastcgi_input_filter_init;
  
      rc = ngx_http_read_client_request_body(r, ngx_http_upstream_init);
  
      if (rc >= NGX_HTTP_SPECIAL_RESPONSE) {
          return rc;
      }
  
      return NGX_DONE;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_eval(ngx_http_request_t *r, ngx_http_fastcgi_loc_conf_t *flcf)
  {
      ngx_url_t             url;
      ngx_http_upstream_t  *u;
  
      ngx_memzero(&url, sizeof(ngx_url_t));
  
      if (ngx_http_script_run(r, &url.url, flcf->fastcgi_lengths->elts, 0,
                              flcf->fastcgi_values->elts)
          == NULL)
      {
          return NGX_ERROR;
      }
  
      url.no_resolve = 1;
  
      if (ngx_parse_url(r->pool, &url) != NGX_OK) {
           if (url.err) {
              ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                            "%s in upstream \"%V\"", url.err, &url.url);
          }
  
          return NGX_ERROR;
      }
  
      u = r->upstream;
  
      u->resolved = ngx_pcalloc(r->pool, sizeof(ngx_http_upstream_resolved_t));
      if (u->resolved == NULL) {
          return NGX_ERROR;
      }
  
      if (url.addrs && url.addrs[0].sockaddr) {
          u->resolved->sockaddr = url.addrs[0].sockaddr;
          u->resolved->socklen = url.addrs[0].socklen;
          u->resolved->naddrs = 1;
          u->resolved->host = url.addrs[0].name;
  
      } else {
          u->resolved->host = url.host;
          u->resolved->port = url.port;
          u->resolved->no_port = url.no_port;
      }
  
      return NGX_OK;
  }
  
  
  #if (NGX_HTTP_CACHE)
  
  static ngx_int_t
  ngx_http_fastcgi_create_key(ngx_http_request_t *r)
  {
      ngx_str_t                    *key;
      ngx_http_fastcgi_loc_conf_t  *flcf;
  
      key = ngx_array_push(&r->cache->keys);
      if (key == NULL) {
          return NGX_ERROR;
      }
  
      flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
      if (ngx_http_complex_value(r, &flcf->cache_key, key) != NGX_OK) {
          return NGX_ERROR;
      }
  
      return NGX_OK;
  }
  
  #endif
  
  
  static ngx_int_t
  ngx_http_fastcgi_create_request(ngx_http_request_t *r)
  {
      off_t                         file_pos;
      u_char                        ch, *pos, *lowcase_key;
      size_t                        size, len, key_len, val_len, padding,
                                    allocated;
      ngx_uint_t                    i, n, next, hash, skip_empty, header_params;
      ngx_buf_t                    *b;
      ngx_chain_t                  *cl, *body;
      ngx_list_part_t              *part;
      ngx_table_elt_t              *header, **ignored;
      ngx_http_script_code_pt       code;
      ngx_http_script_engine_t      e, le;
      ngx_http_fastcgi_header_t    *h;
      ngx_http_fastcgi_loc_conf_t  *flcf;
      ngx_http_script_len_code_pt   lcode;
  
      len = 0;
      header_params = 0;
      ignored = NULL;
  
      flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
      if (flcf->params_len) {
          ngx_memzero(&le, sizeof(ngx_http_script_engine_t));
  
          ngx_http_script_flush_no_cacheable_variables(r, flcf->flushes);
          le.flushed = 1;
  
          le.ip = flcf->params_len->elts;
          le.request = r;
  
          while (*(uintptr_t *) le.ip) {
  
              lcode = *(ngx_http_script_len_code_pt *) le.ip;
              key_len = lcode(&le);
  
              lcode = *(ngx_http_script_len_code_pt *) le.ip;
              skip_empty = lcode(&le);
  
              for (val_len = 0; *(uintptr_t *) le.ip; val_len += lcode(&le)) {
                  lcode = *(ngx_http_script_len_code_pt *) le.ip;
              }
              le.ip += sizeof(uintptr_t);
  
              if (skip_empty && val_len == 0) {
                  continue;
              }
  
              len += 1 + key_len + ((val_len > 127) ? 4 : 1) + val_len;
          }
      }
  
      if (flcf->upstream.pass_request_headers) {
  
          allocated = 0;
          lowcase_key = NULL;
  
          if (flcf->header_params) {
              n = 0;
              part = &r->headers_in.headers.part;
  
              while (part) {
                  n += part->nelts;
                  part = part->next;
              }
  
              ignored = ngx_palloc(r->pool, n * sizeof(void *));
              if (ignored == NULL) {
                  return NGX_ERROR;
              }
          }
  
          part = &r->headers_in.headers.part;
          header = part->elts;
  
          for (i = 0; /* void */; i++) {
  
              if (i >= part->nelts) {
                  if (part->next == NULL) {
                      break;
                  }
  
                  part = part->next;
                  header = part->elts;
                  i = 0;
              }
  
              if (flcf->header_params) {
                  if (allocated < header[i].key.len) {
                      allocated = header[i].key.len + 16;
                      lowcase_key = ngx_pnalloc(r->pool, allocated);
                      if (lowcase_key == NULL) {
                          return NGX_ERROR;
                      }
                  }
  
                  hash = 0;
  
                  for (n = 0; n < header[i].key.len; n++) {
                      ch = header[i].key.data[n];
  
                      if (ch >= 'A' && ch <= 'Z') {
                          ch |= 0x20;
  
                      } else if (ch == '-') {
                          ch = '_';
                      }
  
                      hash = ngx_hash(hash, ch);
                      lowcase_key[n] = ch;
                  }
  
                  if (ngx_hash_find(&flcf->headers_hash, hash, lowcase_key, n)) {
                      ignored[header_params++] = &header[i];
                      continue;
                  }
  
                  n += sizeof("HTTP_") - 1;
  
              } else {
                  n = sizeof("HTTP_") - 1 + header[i].key.len;
              }
  
              len += ((n > 127) ? 4 : 1) + ((header[i].value.len > 127) ? 4 : 1)
                  + n + header[i].value.len;
          }
      }
  
  
      if (len > 65535) {
          ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
                        "fastcgi request record is too big: %uz", len);
          return NGX_ERROR;
      }
  
  
      padding = 8 - len % 8;
      padding = (padding == 8) ? 0 : padding;
  
  
      size = sizeof(ngx_http_fastcgi_header_t)
             + sizeof(ngx_http_fastcgi_begin_request_t)
  
             + sizeof(ngx_http_fastcgi_header_t)  /* NGX_HTTP_FASTCGI_PARAMS */
             + len + padding
             + sizeof(ngx_http_fastcgi_header_t)  /* NGX_HTTP_FASTCGI_PARAMS */
  
             + sizeof(ngx_http_fastcgi_header_t); /* NGX_HTTP_FASTCGI_STDIN */
  
  
      b = ngx_create_temp_buf(r->pool, size);
      if (b == NULL) {
          return NGX_ERROR;
      }
  
      cl = ngx_alloc_chain_link(r->pool);
      if (cl == NULL) {
          return NGX_ERROR;
      }
  
      cl->buf = b;
  
      ngx_http_fastcgi_request_start.br.flags =
          flcf->keep_conn ? NGX_HTTP_FASTCGI_KEEP_CONN : 0;
  
      ngx_memcpy(b->pos, &ngx_http_fastcgi_request_start,
                 sizeof(ngx_http_fastcgi_request_start_t));
  
      h = (ngx_http_fastcgi_header_t *)
               (b->pos + sizeof(ngx_http_fastcgi_header_t)
                       + sizeof(ngx_http_fastcgi_begin_request_t));
  
      h->content_length_hi = (u_char) ((len >> 8) & 0xff);
      h->content_length_lo = (u_char) (len & 0xff);
      h->padding_length = (u_char) padding;
      h->reserved = 0;
  
      b->last = b->pos + sizeof(ngx_http_fastcgi_header_t)
                       + sizeof(ngx_http_fastcgi_begin_request_t)
                       + sizeof(ngx_http_fastcgi_header_t);
  
  
      if (flcf->params_len) {
          ngx_memzero(&e, sizeof(ngx_http_script_engine_t));
  
          e.ip = flcf->params->elts;
          e.pos = b->last;
          e.request = r;
          e.flushed = 1;
  
          le.ip = flcf->params_len->elts;
  
          while (*(uintptr_t *) le.ip) {
  
              lcode = *(ngx_http_script_len_code_pt *) le.ip;
              key_len = (u_char) lcode(&le);
  
              lcode = *(ngx_http_script_len_code_pt *) le.ip;
              skip_empty = lcode(&le);
  
              for (val_len = 0; *(uintptr_t *) le.ip; val_len += lcode(&le)) {
                  lcode = *(ngx_http_script_len_code_pt *) le.ip;
              }
              le.ip += sizeof(uintptr_t);
  
              if (skip_empty && val_len == 0) {
                  e.skip = 1;
  
                  while (*(uintptr_t *) e.ip) {
                      code = *(ngx_http_script_code_pt *) e.ip;
                      code((ngx_http_script_engine_t *) &e);
                  }
                  e.ip += sizeof(uintptr_t);
  
                  e.skip = 0;
  
                  continue;
              }
  
              *e.pos++ = (u_char) key_len;
  
              if (val_len > 127) {
                  *e.pos++ = (u_char) (((val_len >> 24) & 0x7f) | 0x80);
                  *e.pos++ = (u_char) ((val_len >> 16) & 0xff);
                  *e.pos++ = (u_char) ((val_len >> 8) & 0xff);
                  *e.pos++ = (u_char) (val_len & 0xff);
  
              } else {
                  *e.pos++ = (u_char) val_len;
              }
  
              while (*(uintptr_t *) e.ip) {
                  code = *(ngx_http_script_code_pt *) e.ip;
                  code((ngx_http_script_engine_t *) &e);
              }
              e.ip += sizeof(uintptr_t);
  
              ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                             "fastcgi param: \"%*s: %*s\"",
                             key_len, e.pos - (key_len + val_len),
                             val_len, e.pos - val_len);
          }
  
          b->last = e.pos;
      }
  
  
      if (flcf->upstream.pass_request_headers) {
  
          part = &r->headers_in.headers.part;
          header = part->elts;
  
          for (i = 0; /* void */; i++) {
  
              if (i >= part->nelts) {
                  if (part->next == NULL) {
                      break;
                  }
  
                  part = part->next;
                  header = part->elts;
                  i = 0;
              }
  
              for (n = 0; n < header_params; n++) {
                  if (&header[i] == ignored[n]) {
                      goto next;
                  }
              }
  
              key_len = sizeof("HTTP_") - 1 + header[i].key.len;
              if (key_len > 127) {
                  *b->last++ = (u_char) (((key_len >> 24) & 0x7f) | 0x80);
                  *b->last++ = (u_char) ((key_len >> 16) & 0xff);
                  *b->last++ = (u_char) ((key_len >> 8) & 0xff);
                  *b->last++ = (u_char) (key_len & 0xff);
  
              } else {
                  *b->last++ = (u_char) key_len;
              }
  
              val_len = header[i].value.len;
              if (val_len > 127) {
                  *b->last++ = (u_char) (((val_len >> 24) & 0x7f) | 0x80);
                  *b->last++ = (u_char) ((val_len >> 16) & 0xff);
                  *b->last++ = (u_char) ((val_len >> 8) & 0xff);
                  *b->last++ = (u_char) (val_len & 0xff);
  
              } else {
                  *b->last++ = (u_char) val_len;
              }
  
              b->last = ngx_cpymem(b->last, "HTTP_", sizeof("HTTP_") - 1);
  
              for (n = 0; n < header[i].key.len; n++) {
                  ch = header[i].key.data[n];
  
                  if (ch >= 'a' && ch <= 'z') {
                      ch &= ~0x20;
  
                  } else if (ch == '-') {
                      ch = '_';
                  }
  
                  *b->last++ = ch;
              }
  
              b->last = ngx_copy(b->last, header[i].value.data, val_len);
  
              ngx_log_debug4(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                             "fastcgi param: \"%*s: %*s\"",
                             key_len, b->last - (key_len + val_len),
                             val_len, b->last - val_len);
          next:
  
              continue;
          }
      }
  
  
      if (padding) {
          ngx_memzero(b->last, padding);
          b->last += padding;
      }
  
  
      h = (ngx_http_fastcgi_header_t *) b->last;
      b->last += sizeof(ngx_http_fastcgi_header_t);
  
      h->version = 1;
      h->type = NGX_HTTP_FASTCGI_PARAMS;
      h->request_id_hi = 0;
      h->request_id_lo = 1;
      h->content_length_hi = 0;
      h->content_length_lo = 0;
      h->padding_length = 0;
      h->reserved = 0;
  
      h = (ngx_http_fastcgi_header_t *) b->last;
      b->last += sizeof(ngx_http_fastcgi_header_t);
  
      if (flcf->upstream.pass_request_body) {
          body = r->upstream->request_bufs;
          r->upstream->request_bufs = cl;
  
  #if (NGX_SUPPRESS_WARN)
          file_pos = 0;
          pos = NULL;
  #endif
  
          while (body) {
  
              if (body->buf->in_file) {
                  file_pos = body->buf->file_pos;
  
              } else {
                  pos = body->buf->pos;
              }
  
              next = 0;
  
              do {
                  b = ngx_alloc_buf(r->pool);
                  if (b == NULL) {
                      return NGX_ERROR;
                  }
  
                  ngx_memcpy(b, body->buf, sizeof(ngx_buf_t));
  
                  if (body->buf->in_file) {
                      b->file_pos = file_pos;
                      file_pos += 32 * 1024;
  
                      if (file_pos >= body->buf->file_last) {
                          file_pos = body->buf->file_last;
                          next = 1;
                      }
  
                      b->file_last = file_pos;
                      len = (ngx_uint_t) (file_pos - b->file_pos);
  
                  } else {
                      b->pos = pos;
                      pos += 32 * 1024;
  
                      if (pos >= body->buf->last) {
                          pos = body->buf->last;
                          next = 1;
                      }
  
                      b->last = pos;
                      len = (ngx_uint_t) (pos - b->pos);
                  }
  
                  padding = 8 - len % 8;
                  padding = (padding == 8) ? 0 : padding;
  
                  h->version = 1;
                  h->type = NGX_HTTP_FASTCGI_STDIN;
                  h->request_id_hi = 0;
                  h->request_id_lo = 1;
                  h->content_length_hi = (u_char) ((len >> 8) & 0xff);
                  h->content_length_lo = (u_char) (len & 0xff);
                  h->padding_length = (u_char) padding;
                  h->reserved = 0;
  
                  cl->next = ngx_alloc_chain_link(r->pool);
                  if (cl->next == NULL) {
                      return NGX_ERROR;
                  }
  
                  cl = cl->next;
                  cl->buf = b;
  
                  b = ngx_create_temp_buf(r->pool,
                                          sizeof(ngx_http_fastcgi_header_t)
                                          + padding);
                  if (b == NULL) {
                      return NGX_ERROR;
                  }
  
                  if (padding) {
                      ngx_memzero(b->last, padding);
                      b->last += padding;
                  }
  
                  h = (ngx_http_fastcgi_header_t *) b->last;
                  b->last += sizeof(ngx_http_fastcgi_header_t);
  
                  cl->next = ngx_alloc_chain_link(r->pool);
                  if (cl->next == NULL) {
                      return NGX_ERROR;
                  }
  
                  cl = cl->next;
                  cl->buf = b;
  
              } while (!next);
  
              body = body->next;
          }
  
      } else {
          r->upstream->request_bufs = cl;
      }
  
      h->version = 1;
      h->type = NGX_HTTP_FASTCGI_STDIN;
      h->request_id_hi = 0;
      h->request_id_lo = 1;
      h->content_length_hi = 0;
      h->content_length_lo = 0;
      h->padding_length = 0;
      h->reserved = 0;
  
      cl->next = NULL;
  
      return NGX_OK;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_reinit_request(ngx_http_request_t *r)
  {
      ngx_http_fastcgi_ctx_t  *f;
  
      f = ngx_http_get_module_ctx(r, ngx_http_fastcgi_module);
  
      if (f == NULL) {
          return NGX_OK;
      }
  
      f->state = ngx_http_fastcgi_st_version;
      f->fastcgi_stdout = 0;
      f->large_stderr = 0;
  
      r->state = 0;
  
      return NGX_OK;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_process_header(ngx_http_request_t *r)
  {
      u_char                         *p, *msg, *start, *last,
                                     *part_start, *part_end;
      size_t                          size;
      ngx_str_t                      *status_line, *pattern;
      ngx_int_t                       rc, status;
      ngx_buf_t                       buf;
      ngx_uint_t                      i;
      ngx_table_elt_t                *h;
      ngx_http_upstream_t            *u;
      ngx_http_fastcgi_ctx_t         *f;
      ngx_http_upstream_header_t     *hh;
      ngx_http_fastcgi_loc_conf_t    *flcf;
      ngx_http_fastcgi_split_part_t  *part;
      ngx_http_upstream_main_conf_t  *umcf;
  
      f = ngx_http_get_module_ctx(r, ngx_http_fastcgi_module);
  
      umcf = ngx_http_get_module_main_conf(r, ngx_http_upstream_module);
  
      u = r->upstream;
  
      for ( ;; ) {
  
          if (f->state < ngx_http_fastcgi_st_data) {
  
              f->pos = u->buffer.pos;
              f->last = u->buffer.last;
  
              rc = ngx_http_fastcgi_process_record(r, f);
  
              u->buffer.pos = f->pos;
              u->buffer.last = f->last;
  
              if (rc == NGX_AGAIN) {
                  return NGX_AGAIN;
              }
  
              if (rc == NGX_ERROR) {
                  return NGX_HTTP_UPSTREAM_INVALID_HEADER;
              }
  
              if (f->type != NGX_HTTP_FASTCGI_STDOUT
                  && f->type != NGX_HTTP_FASTCGI_STDERR)
              {
                  ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "upstream sent unexpected FastCGI record: %d",
                                f->type);
  
                  return NGX_HTTP_UPSTREAM_INVALID_HEADER;
              }
  
              if (f->type == NGX_HTTP_FASTCGI_STDOUT && f->length == 0) {
                  ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "upstream prematurely closed FastCGI stdout");
  
                  return NGX_HTTP_UPSTREAM_INVALID_HEADER;
              }
          }
  
          if (f->state == ngx_http_fastcgi_st_padding) {
  
              if (u->buffer.pos + f->padding < u->buffer.last) {
                  f->state = ngx_http_fastcgi_st_version;
                  u->buffer.pos += f->padding;
  
                  continue;
              }
  
              if (u->buffer.pos + f->padding == u->buffer.last) {
                  f->state = ngx_http_fastcgi_st_version;
                  u->buffer.pos = u->buffer.last;
  
                  return NGX_AGAIN;
              }
  
              f->padding -= u->buffer.last - u->buffer.pos;
              u->buffer.pos = u->buffer.last;
  
              return NGX_AGAIN;
          }
  
  
          /* f->state == ngx_http_fastcgi_st_data */
  
          if (f->type == NGX_HTTP_FASTCGI_STDERR) {
  
              if (f->length) {
                  msg = u->buffer.pos;
  
                  if (u->buffer.pos + f->length <= u->buffer.last) {
                      u->buffer.pos += f->length;
                      f->length = 0;
                      f->state = ngx_http_fastcgi_st_padding;
  
                  } else {
                      f->length -= u->buffer.last - u->buffer.pos;
                      u->buffer.pos = u->buffer.last;
                  }
  
                  for (p = u->buffer.pos - 1; msg < p; p--) {
                      if (*p != LF && *p != CR && *p != '.' && *p != ' ') {
                          break;
                      }
                  }
  
                  p++;
  
                  ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "FastCGI sent in stderr: \"%*s\"", p - msg, msg);
  
                  flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
                  if (flcf->catch_stderr) {
                      pattern = flcf->catch_stderr->elts;
  
                      for (i = 0; i < flcf->catch_stderr->nelts; i++) {
                          if (ngx_strnstr(msg, (char *) pattern[i].data,
                                          p - msg)
                              != NULL)
                          {
                              return NGX_HTTP_UPSTREAM_INVALID_HEADER;
                          }
                      }
                  }
  
                  if (u->buffer.pos == u->buffer.last) {
  
                      if (!f->fastcgi_stdout) {
  
                          /*
                           * the special handling the large number
                           * of the PHP warnings to not allocate memory
                           */
  
  #if (NGX_HTTP_CACHE)
                          if (r->cache) {
                              u->buffer.pos = u->buffer.start
                                                       + r->cache->header_start;
                          } else {
                              u->buffer.pos = u->buffer.start;
                          }
  #else
                          u->buffer.pos = u->buffer.start;
  #endif
                          u->buffer.last = u->buffer.pos;
                          f->large_stderr = 1;
                      }
  
                      return NGX_AGAIN;
                  }
  
              } else {
                  f->state = ngx_http_fastcgi_st_padding;
              }
  
              continue;
          }
  
  
          /* f->type == NGX_HTTP_FASTCGI_STDOUT */
  
  #if (NGX_HTTP_CACHE)
  
          if (f->large_stderr && r->cache) {
              u_char                     *start;
              ssize_t                     len;
              ngx_http_fastcgi_header_t  *fh;
  
              start = u->buffer.start + r->cache->header_start;
  
              len = u->buffer.pos - start - 2 * sizeof(ngx_http_fastcgi_header_t);
  
              /*
               * A tail of large stderr output before HTTP header is placed
               * in a cache file without a FastCGI record header.
               * To workaround it we put a dummy FastCGI record header at the
               * start of the stderr output or update r->cache_header_start,
               * if there is no enough place for the record header.
               */
  
              if (len >= 0) {
                  fh = (ngx_http_fastcgi_header_t *) start;
                  fh->version = 1;
                  fh->type = NGX_HTTP_FASTCGI_STDERR;
                  fh->request_id_hi = 0;
                  fh->request_id_lo = 1;
                  fh->content_length_hi = (u_char) ((len >> 8) & 0xff);
                  fh->content_length_lo = (u_char) (len & 0xff);
                  fh->padding_length = 0;
                  fh->reserved = 0;
  
              } else {
                  r->cache->header_start += u->buffer.pos - start
                                             - sizeof(ngx_http_fastcgi_header_t);
              }
  
              f->large_stderr = 0;
          }
  
  #endif
  
          f->fastcgi_stdout = 1;
  
          start = u->buffer.pos;
  
          if (u->buffer.pos + f->length < u->buffer.last) {
  
              /*
               * set u->buffer.last to the end of the FastCGI record data
               * for ngx_http_parse_header_line()
               */
  
              last = u->buffer.last;
              u->buffer.last = u->buffer.pos + f->length;
  
          } else {
              last = NULL;
          }
  
          for ( ;; ) {
  
              part_start = u->buffer.pos;
              part_end = u->buffer.last;
  
              rc = ngx_http_parse_header_line(r, &u->buffer, 1);
  
              ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                             "http fastcgi parser: %d", rc);
  
              if (rc == NGX_AGAIN) {
                  break;
              }
  
              if (rc == NGX_OK) {
  
                  /* a header line has been parsed successfully */
  
                  h = ngx_list_push(&u->headers_in.headers);
                  if (h == NULL) {
                      return NGX_ERROR;
                  }
  
                  if (f->split_parts && f->split_parts->nelts) {
  
                      part = f->split_parts->elts;
                      size = u->buffer.pos - part_start;
  
                      for (i = 0; i < f->split_parts->nelts; i++) {
                          size += part[i].end - part[i].start;
                      }
  
                      p = ngx_pnalloc(r->pool, size);
                      if (p == NULL) {
                          return NGX_ERROR;
                      }
  
                      buf.pos = p;
  
                      for (i = 0; i < f->split_parts->nelts; i++) {
                          p = ngx_cpymem(p, part[i].start,
                                         part[i].end - part[i].start);
                      }
  
                      p = ngx_cpymem(p, part_start, u->buffer.pos - part_start);
  
                      buf.last = p;
  
                      f->split_parts->nelts = 0;
  
                      rc = ngx_http_parse_header_line(r, &buf, 1);
  
                      h->key.len = r->header_name_end - r->header_name_start;
                      h->key.data = r->header_name_start;
                      h->key.data[h->key.len] = '\0';
  
                      h->value.len = r->header_end - r->header_start;
                      h->value.data = r->header_start;
                      h->value.data[h->value.len] = '\0';
  
                      h->lowcase_key = ngx_pnalloc(r->pool, h->key.len);
                      if (h->lowcase_key == NULL) {
                          return NGX_ERROR;
                      }
  
                  } else {
  
                      h->key.len = r->header_name_end - r->header_name_start;
                      h->value.len = r->header_end - r->header_start;
  
                      h->key.data = ngx_pnalloc(r->pool,
                                                h->key.len + 1 + h->value.len + 1
                                                + h->key.len);
                      if (h->key.data == NULL) {
                          return NGX_ERROR;
                      }
  
                      h->value.data = h->key.data + h->key.len + 1;
                      h->lowcase_key = h->key.data + h->key.len + 1
                                       + h->value.len + 1;
  
                      ngx_memcpy(h->key.data, r->header_name_start, h->key.len);
                      h->key.data[h->key.len] = '\0';
                      ngx_memcpy(h->value.data, r->header_start, h->value.len);
                      h->value.data[h->value.len] = '\0';
                  }
  
                  h->hash = r->header_hash;
  
                  if (h->key.len == r->lowcase_index) {
                      ngx_memcpy(h->lowcase_key, r->lowcase_header, h->key.len);
  
                  } else {
                      ngx_strlow(h->lowcase_key, h->key.data, h->key.len);
                  }
  
                  hh = ngx_hash_find(&umcf->headers_in_hash, h->hash,
                                     h->lowcase_key, h->key.len);
  
                  if (hh && hh->handler(r, h, hh->offset) != NGX_OK) {
                      return NGX_ERROR;
                  }
  
                  ngx_log_debug2(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                                 "http fastcgi header: \"%V: %V\"",
                                 &h->key, &h->value);
  
                  if (u->buffer.pos < u->buffer.last) {
                      continue;
                  }
  
                  /* the end of the FastCGI record */
  
                  break;
              }
  
              if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
  
                  /* a whole header has been parsed successfully */
  
                  ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                                 "http fastcgi header done");
  
                  if (u->headers_in.status) {
                      status_line = &u->headers_in.status->value;
  
                      status = ngx_atoi(status_line->data, 3);
  
                      if (status == NGX_ERROR) {
                          ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                        "upstream sent invalid status \"%V\"",
                                        status_line);
                          return NGX_HTTP_UPSTREAM_INVALID_HEADER;
                      }
  
                      u->headers_in.status_n = status;
                      u->headers_in.status_line = *status_line;
  
                  } else if (u->headers_in.location) {
                      u->headers_in.status_n = 302;
                      ngx_str_set(&u->headers_in.status_line,
                                  "302 Moved Temporarily");
  
                  } else {
                      u->headers_in.status_n = 200;
                      ngx_str_set(&u->headers_in.status_line, "200 OK");
                  }
  
                  if (u->state) {
                      u->state->status = u->headers_in.status_n;
                  }
  
                  break;
              }
  
              /* there was error while a header line parsing */
  
              ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                            "upstream sent invalid header");
  
              return NGX_HTTP_UPSTREAM_INVALID_HEADER;
          }
  
          if (last) {
              u->buffer.last = last;
          }
  
          f->length -= u->buffer.pos - start;
  
          if (f->length == 0) {
              f->state = ngx_http_fastcgi_st_padding;
          }
  
          if (rc == NGX_HTTP_PARSE_HEADER_DONE) {
              return NGX_OK;
          }
  
          if (rc == NGX_OK) {
              continue;
          }
  
          /* rc == NGX_AGAIN */
  
          ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                         "upstream split a header line in FastCGI records");
  
          if (f->split_parts == NULL) {
              f->split_parts = ngx_array_create(r->pool, 1,
                                          sizeof(ngx_http_fastcgi_split_part_t));
              if (f->split_parts == NULL) {
                  return NGX_ERROR;
              }
          }
  
          part = ngx_array_push(f->split_parts);
          if (part == NULL) {
              return NGX_ERROR;
          }
  
          part->start = part_start;
          part->end = part_end;
  
          if (u->buffer.pos < u->buffer.last) {
              continue;
          }
  
          return NGX_AGAIN;
      }
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_input_filter_init(void *data)
  {
      ngx_http_request_t           *r = data;
      ngx_http_fastcgi_loc_conf_t  *flcf;
  
      flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
      r->upstream->pipe->length = flcf->keep_conn ?
                                  (off_t) sizeof(ngx_http_fastcgi_header_t) : -1;
  
      return NGX_OK;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_input_filter(ngx_event_pipe_t *p, ngx_buf_t *buf)
  {
      u_char                       *m, *msg;
      ngx_int_t                     rc;
      ngx_buf_t                    *b, **prev;
      ngx_chain_t                  *cl;
      ngx_http_request_t           *r;
      ngx_http_fastcgi_ctx_t       *f;
      ngx_http_fastcgi_loc_conf_t  *flcf;
  
      if (buf->pos == buf->last) {
          return NGX_OK;
      }
  
      r = p->input_ctx;
      f = ngx_http_get_module_ctx(r, ngx_http_fastcgi_module);
      flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
      b = NULL;
      prev = &buf->shadow;
  
      f->pos = buf->pos;
      f->last = buf->last;
  
      for ( ;; ) {
          if (f->state < ngx_http_fastcgi_st_data) {
  
              rc = ngx_http_fastcgi_process_record(r, f);
  
              if (rc == NGX_AGAIN) {
                  break;
              }
  
              if (rc == NGX_ERROR) {
                  return NGX_ERROR;
              }
  
              if (f->type == NGX_HTTP_FASTCGI_STDOUT && f->length == 0) {
                  f->state = ngx_http_fastcgi_st_padding;
  
                  if (!flcf->keep_conn) {
                      p->upstream_done = 1;
                  }
  
                  ngx_log_debug0(NGX_LOG_DEBUG_HTTP, p->log, 0,
                                 "http fastcgi closed stdout");
  
                  continue;
              }
  
              if (f->type == NGX_HTTP_FASTCGI_END_REQUEST) {
  
                  ngx_log_debug0(NGX_LOG_DEBUG_HTTP, p->log, 0,
                                 "http fastcgi sent end request");
  
                  if (!flcf->keep_conn) {
                      p->upstream_done = 1;
                      break;
                  }
  
                  continue;
              }
          }
  
  
          if (f->state == ngx_http_fastcgi_st_padding) {
  
              if (f->type == NGX_HTTP_FASTCGI_END_REQUEST) {
  
                  if (f->pos + f->padding < f->last) {
                      p->upstream_done = 1;
                      break;
                  }
  
                  if (f->pos + f->padding == f->last) {
                      p->upstream_done = 1;
                      r->upstream->keepalive = 1;
                      break;
                  }
  
                  f->padding -= f->last - f->pos;
  
                  break;
              }
  
              if (f->pos + f->padding < f->last) {
                  f->state = ngx_http_fastcgi_st_version;
                  f->pos += f->padding;
  
                  continue;
              }
  
              if (f->pos + f->padding == f->last) {
                  f->state = ngx_http_fastcgi_st_version;
  
                  break;
              }
  
              f->padding -= f->last - f->pos;
  
              break;
          }
  
  
          /* f->state == ngx_http_fastcgi_st_data */
  
          if (f->type == NGX_HTTP_FASTCGI_STDERR) {
  
              if (f->length) {
  
                  if (f->pos == f->last) {
                      break;
                  }
  
                  msg = f->pos;
  
                  if (f->pos + f->length <= f->last) {
                      f->pos += f->length;
                      f->length = 0;
                      f->state = ngx_http_fastcgi_st_padding;
  
                  } else {
                      f->length -= f->last - f->pos;
                      f->pos = f->last;
                  }
  
                  for (m = f->pos - 1; msg < m; m--) {
                      if (*m != LF && *m != CR && *m != '.' && *m != ' ') {
                          break;
                      }
                  }
  
                  ngx_log_error(NGX_LOG_ERR, p->log, 0,
                                "FastCGI sent in stderr: \"%*s\"",
                                m + 1 - msg, msg);
  
              } else {
                  f->state = ngx_http_fastcgi_st_padding;
              }
  
              continue;
          }
  
          if (f->type == NGX_HTTP_FASTCGI_END_REQUEST) {
  
              if (f->pos + f->length <= f->last) {
                  f->state = ngx_http_fastcgi_st_padding;
                  f->pos += f->length;
  
                  continue;
              }
  
              f->length -= f->last - f->pos;
  
              break;
          }
  
  
          /* f->type == NGX_HTTP_FASTCGI_STDOUT */
  
          if (f->pos == f->last) {
              break;
          }
  
          if (p->free) {
              cl = p->free;
              b = cl->buf;
              p->free = cl->next;
              ngx_free_chain(p->pool, cl);
  
          } else {
              b = ngx_alloc_buf(p->pool);
              if (b == NULL) {
                  return NGX_ERROR;
              }
          }
  
          ngx_memzero(b, sizeof(ngx_buf_t));
  
          b->pos = f->pos;
          b->start = buf->start;
          b->end = buf->end;
          b->tag = p->tag;
          b->temporary = 1;
          b->recycled = 1;
  
          *prev = b;
          prev = &b->shadow;
  
          cl = ngx_alloc_chain_link(p->pool);
          if (cl == NULL) {
              return NGX_ERROR;
          }
  
          cl->buf = b;
          cl->next = NULL;
  
          if (p->in) {
              *p->last_in = cl;
          } else {
              p->in = cl;
          }
          p->last_in = &cl->next;
  
  
          /* STUB */ b->num = buf->num;
  
          ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
                         "input buf #%d %p", b->num, b->pos);
  
          if (f->pos + f->length <= f->last) {
              f->state = ngx_http_fastcgi_st_padding;
              f->pos += f->length;
              b->last = f->pos;
  
              continue;
          }
  
          f->length -= f->last - f->pos;
  
          b->last = f->last;
  
          break;
  
      }
  
      if (flcf->keep_conn) {
  
          /* set p->length, minimal amount of data we want to see */
  
          if (f->state < ngx_http_fastcgi_st_data) {
              p->length = 1;
  
          } else if (f->state == ngx_http_fastcgi_st_padding) {
              p->length = f->padding;
  
          } else {
              /* ngx_http_fastcgi_st_data */
  
              p->length = f->length;
          }
      }
  
      if (b) {
          b->shadow = buf;
          b->last_shadow = 1;
  
          ngx_log_debug2(NGX_LOG_DEBUG_EVENT, p->log, 0,
                         "input buf %p %z", b->pos, b->last - b->pos);
  
          return NGX_OK;
      }
  
      /* there is no data record in the buf, add it to free chain */
  
      if (ngx_event_pipe_add_free_buf(p, buf) != NGX_OK) {
          return NGX_ERROR;
      }
  
      return NGX_OK;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_process_record(ngx_http_request_t *r,
      ngx_http_fastcgi_ctx_t *f)
  {
      u_char                     ch, *p;
      ngx_http_fastcgi_state_e   state;
  
      state = f->state;
  
      for (p = f->pos; p < f->last; p++) {
  
          ch = *p;
  
          ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                         "http fastcgi record byte: %02Xd", ch);
  
          switch (state) {
  
          case ngx_http_fastcgi_st_version:
              if (ch != 1) {
                  ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "upstream sent unsupported FastCGI "
                                "protocol version: %d", ch);
                  return NGX_ERROR;
              }
              state = ngx_http_fastcgi_st_type;
              break;
  
          case ngx_http_fastcgi_st_type:
              switch (ch) {
              case NGX_HTTP_FASTCGI_STDOUT:
              case NGX_HTTP_FASTCGI_STDERR:
              case NGX_HTTP_FASTCGI_END_REQUEST:
                   f->type = (ngx_uint_t) ch;
                   break;
              default:
                  ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "upstream sent invalid FastCGI "
                                "record type: %d", ch);
                  return NGX_ERROR;
  
              }
              state = ngx_http_fastcgi_st_request_id_hi;
              break;
  
          /* we support the single request per connection */
  
          case ngx_http_fastcgi_st_request_id_hi:
              if (ch != 0) {
                  ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "upstream sent unexpected FastCGI "
                                "request id high byte: %d", ch);
                  return NGX_ERROR;
              }
              state = ngx_http_fastcgi_st_request_id_lo;
              break;
  
          case ngx_http_fastcgi_st_request_id_lo:
              if (ch != 1) {
                  ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
                                "upstream sent unexpected FastCGI "
                                "request id low byte: %d", ch);
                  return NGX_ERROR;
              }
              state = ngx_http_fastcgi_st_content_length_hi;
              break;
  
          case ngx_http_fastcgi_st_content_length_hi:
              f->length = ch << 8;
              state = ngx_http_fastcgi_st_content_length_lo;
              break;
  
          case ngx_http_fastcgi_st_content_length_lo:
              f->length |= (size_t) ch;
              state = ngx_http_fastcgi_st_padding_length;
              break;
  
          case ngx_http_fastcgi_st_padding_length:
              f->padding = (size_t) ch;
              state = ngx_http_fastcgi_st_reserved;
              break;
  
          case ngx_http_fastcgi_st_reserved:
              state = ngx_http_fastcgi_st_data;
  
              ngx_log_debug1(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                             "http fastcgi record length: %z", f->length);
  
              f->pos = p + 1;
              f->state = state;
  
              return NGX_OK;
  
          /* suppress warning */
          case ngx_http_fastcgi_st_data:
          case ngx_http_fastcgi_st_padding:
              break;
          }
      }
  
      f->state = state;
  
      return NGX_AGAIN;
  }
  
  
  static void
  ngx_http_fastcgi_abort_request(ngx_http_request_t *r)
  {
      ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                     "abort http fastcgi request");
  
      return;
  }
  
  
  static void
  ngx_http_fastcgi_finalize_request(ngx_http_request_t *r, ngx_int_t rc)
  {
      ngx_log_debug0(NGX_LOG_DEBUG_HTTP, r->connection->log, 0,
                     "finalize http fastcgi request");
  
      return;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_add_variables(ngx_conf_t *cf)
  {
     ngx_http_variable_t  *var, *v;
  
      for (v = ngx_http_fastcgi_vars; v->name.len; v++) {
          var = ngx_http_add_variable(cf, &v->name, v->flags);
          if (var == NULL) {
              return NGX_ERROR;
          }
  
          var->get_handler = v->get_handler;
          var->data = v->data;
      }
  
      return NGX_OK;
  }
  
  
  static void *
  ngx_http_fastcgi_create_loc_conf(ngx_conf_t *cf)
  {
      ngx_http_fastcgi_loc_conf_t  *conf;
  
      conf = ngx_pcalloc(cf->pool, sizeof(ngx_http_fastcgi_loc_conf_t));
      if (conf == NULL) {
          return NULL;
      }
  
      /*
       * set by ngx_pcalloc():
       *
       *     conf->upstream.bufs.num = 0;
       *     conf->upstream.ignore_headers = 0;
       *     conf->upstream.next_upstream = 0;
       *     conf->upstream.cache_use_stale = 0;
       *     conf->upstream.cache_methods = 0;
       *     conf->upstream.temp_path = NULL;
       *     conf->upstream.hide_headers_hash = { NULL, 0 };
       *     conf->upstream.uri = { 0, NULL };
       *     conf->upstream.location = NULL;
       *     conf->upstream.store_lengths = NULL;
       *     conf->upstream.store_values = NULL;
       *
       *     conf->index.len = { 0, NULL };
       */
  
      conf->upstream.store = NGX_CONF_UNSET;
      conf->upstream.store_access = NGX_CONF_UNSET_UINT;
  
      conf->upstream.buffering = NGX_CONF_UNSET;
      conf->upstream.ignore_client_abort = NGX_CONF_UNSET;
  
      conf->upstream.local = NGX_CONF_UNSET_PTR;
  
      conf->upstream.connect_timeout = NGX_CONF_UNSET_MSEC;
      conf->upstream.send_timeout = NGX_CONF_UNSET_MSEC;
      conf->upstream.read_timeout = NGX_CONF_UNSET_MSEC;
  
      conf->upstream.send_lowat = NGX_CONF_UNSET_SIZE;
      conf->upstream.buffer_size = NGX_CONF_UNSET_SIZE;
  
      conf->upstream.busy_buffers_size_conf = NGX_CONF_UNSET_SIZE;
      conf->upstream.max_temp_file_size_conf = NGX_CONF_UNSET_SIZE;
      conf->upstream.temp_file_write_size_conf = NGX_CONF_UNSET_SIZE;
  
      conf->upstream.pass_request_headers = NGX_CONF_UNSET;
      conf->upstream.pass_request_body = NGX_CONF_UNSET;
  
  #if (NGX_HTTP_CACHE)
      conf->upstream.cache = NGX_CONF_UNSET_PTR;
      conf->upstream.cache_min_uses = NGX_CONF_UNSET_UINT;
      conf->upstream.cache_bypass = NGX_CONF_UNSET_PTR;
      conf->upstream.no_cache = NGX_CONF_UNSET_PTR;
      conf->upstream.cache_valid = NGX_CONF_UNSET_PTR;
      conf->upstream.cache_lock = NGX_CONF_UNSET;
      conf->upstream.cache_lock_timeout = NGX_CONF_UNSET_MSEC;
  #endif
  
      conf->upstream.hide_headers = NGX_CONF_UNSET_PTR;
      conf->upstream.pass_headers = NGX_CONF_UNSET_PTR;
  
      conf->upstream.intercept_errors = NGX_CONF_UNSET;
  
      /* "fastcgi_cyclic_temp_file" is disabled */
      conf->upstream.cyclic_temp_file = 0;
  
      conf->catch_stderr = NGX_CONF_UNSET_PTR;
  
      conf->keep_conn = NGX_CONF_UNSET;
  
      ngx_str_set(&conf->upstream.module, "fastcgi");
  
      return conf;
  }
  
  
  static char *
  ngx_http_fastcgi_merge_loc_conf(ngx_conf_t *cf, void *parent, void *child)
  {
      ngx_http_fastcgi_loc_conf_t *prev = parent;
      ngx_http_fastcgi_loc_conf_t *conf = child;
  
      size_t                        size;
      ngx_hash_init_t               hash;
      ngx_http_core_loc_conf_t     *clcf;
  
      if (conf->upstream.store != 0) {
          ngx_conf_merge_value(conf->upstream.store,
                                prev->upstream.store, 0);
  
          if (conf->upstream.store_lengths == NULL) {
              conf->upstream.store_lengths = prev->upstream.store_lengths;
              conf->upstream.store_values = prev->upstream.store_values;
          }
      }
  
      ngx_conf_merge_uint_value(conf->upstream.store_access,
                                prev->upstream.store_access, 0600);
  
      ngx_conf_merge_value(conf->upstream.buffering,
                                prev->upstream.buffering, 1);
  
      ngx_conf_merge_value(conf->upstream.ignore_client_abort,
                                prev->upstream.ignore_client_abort, 0);
  
      ngx_conf_merge_ptr_value(conf->upstream.local,
                                prev->upstream.local, NULL);
  
      ngx_conf_merge_msec_value(conf->upstream.connect_timeout,
                                prev->upstream.connect_timeout, 60000);
  
      ngx_conf_merge_msec_value(conf->upstream.send_timeout,
                                prev->upstream.send_timeout, 60000);
  
      ngx_conf_merge_msec_value(conf->upstream.read_timeout,
                                prev->upstream.read_timeout, 60000);
  
      ngx_conf_merge_size_value(conf->upstream.send_lowat,
                                prev->upstream.send_lowat, 0);
  
      ngx_conf_merge_size_value(conf->upstream.buffer_size,
                                prev->upstream.buffer_size,
                                (size_t) ngx_pagesize);
  
  
      ngx_conf_merge_bufs_value(conf->upstream.bufs, prev->upstream.bufs,
                                8, ngx_pagesize);
  
      if (conf->upstream.bufs.num < 2) {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                             "there must be at least 2 \"fastcgi_buffers\"");
          return NGX_CONF_ERROR;
      }
  
  
      size = conf->upstream.buffer_size;
      if (size < conf->upstream.bufs.size) {
          size = conf->upstream.bufs.size;
      }
  
  
      ngx_conf_merge_size_value(conf->upstream.busy_buffers_size_conf,
                                prev->upstream.busy_buffers_size_conf,
                                NGX_CONF_UNSET_SIZE);
  
      if (conf->upstream.busy_buffers_size_conf == NGX_CONF_UNSET_SIZE) {
          conf->upstream.busy_buffers_size = 2 * size;
      } else {
          conf->upstream.busy_buffers_size =
                                           conf->upstream.busy_buffers_size_conf;
      }
  
      if (conf->upstream.busy_buffers_size < size) {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
               "\"fastcgi_busy_buffers_size\" must be equal to or greater than "
               "the maximum of the value of \"fastcgi_buffer_size\" and "
               "one of the \"fastcgi_buffers\"");
  
          return NGX_CONF_ERROR;
      }
  
      if (conf->upstream.busy_buffers_size
          > (conf->upstream.bufs.num - 1) * conf->upstream.bufs.size)
      {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
               "\"fastcgi_busy_buffers_size\" must be less than "
               "the size of all \"fastcgi_buffers\" minus one buffer");
  
          return NGX_CONF_ERROR;
      }
  
  
      ngx_conf_merge_size_value(conf->upstream.temp_file_write_size_conf,
                                prev->upstream.temp_file_write_size_conf,
                                NGX_CONF_UNSET_SIZE);
  
      if (conf->upstream.temp_file_write_size_conf == NGX_CONF_UNSET_SIZE) {
          conf->upstream.temp_file_write_size = 2 * size;
      } else {
          conf->upstream.temp_file_write_size =
                                        conf->upstream.temp_file_write_size_conf;
      }
  
      if (conf->upstream.temp_file_write_size < size) {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
               "\"fastcgi_temp_file_write_size\" must be equal to or greater "
               "than the maximum of the value of \"fastcgi_buffer_size\" and "
               "one of the \"fastcgi_buffers\"");
  
          return NGX_CONF_ERROR;
      }
  
  
      ngx_conf_merge_size_value(conf->upstream.max_temp_file_size_conf,
                                prev->upstream.max_temp_file_size_conf,
                                NGX_CONF_UNSET_SIZE);
  
      if (conf->upstream.max_temp_file_size_conf == NGX_CONF_UNSET_SIZE) {
          conf->upstream.max_temp_file_size = 1024 * 1024 * 1024;
      } else {
          conf->upstream.max_temp_file_size =
                                          conf->upstream.max_temp_file_size_conf;
      }
  
      if (conf->upstream.max_temp_file_size != 0
          && conf->upstream.max_temp_file_size < size)
      {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
               "\"fastcgi_max_temp_file_size\" must be equal to zero to disable "
               "temporary files usage or must be equal to or greater than "
               "the maximum of the value of \"fastcgi_buffer_size\" and "
               "one of the \"fastcgi_buffers\"");
  
          return NGX_CONF_ERROR;
      }
  
  
      ngx_conf_merge_bitmask_value(conf->upstream.ignore_headers,
                                prev->upstream.ignore_headers,
                                NGX_CONF_BITMASK_SET);
  
  
      ngx_conf_merge_bitmask_value(conf->upstream.next_upstream,
                                prev->upstream.next_upstream,
                                (NGX_CONF_BITMASK_SET
                                 |NGX_HTTP_UPSTREAM_FT_ERROR
                                 |NGX_HTTP_UPSTREAM_FT_TIMEOUT));
  
      if (conf->upstream.next_upstream & NGX_HTTP_UPSTREAM_FT_OFF) {
          conf->upstream.next_upstream = NGX_CONF_BITMASK_SET
                                         |NGX_HTTP_UPSTREAM_FT_OFF;
      }
  
      if (ngx_conf_merge_path_value(cf, &conf->upstream.temp_path,
                                prev->upstream.temp_path,
                                &ngx_http_fastcgi_temp_path)
          != NGX_OK)
      {
          return NGX_CONF_ERROR;
      }
  
  #if (NGX_HTTP_CACHE)
  
      ngx_conf_merge_ptr_value(conf->upstream.cache,
                                prev->upstream.cache, NULL);
  
      if (conf->upstream.cache && conf->upstream.cache->data == NULL) {
          ngx_shm_zone_t  *shm_zone;
  
          shm_zone = conf->upstream.cache;
  
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                             "\"fastcgi_cache\" zone \"%V\" is unknown",
                             &shm_zone->shm.name);
  
          return NGX_CONF_ERROR;
      }
  
      ngx_conf_merge_uint_value(conf->upstream.cache_min_uses,
                                prev->upstream.cache_min_uses, 1);
  
      ngx_conf_merge_bitmask_value(conf->upstream.cache_use_stale,
                                prev->upstream.cache_use_stale,
                                (NGX_CONF_BITMASK_SET
                                 |NGX_HTTP_UPSTREAM_FT_OFF));
  
      if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_OFF) {
          conf->upstream.cache_use_stale = NGX_CONF_BITMASK_SET
                                           |NGX_HTTP_UPSTREAM_FT_OFF;
      }
  
      if (conf->upstream.cache_use_stale & NGX_HTTP_UPSTREAM_FT_ERROR) {
          conf->upstream.cache_use_stale |= NGX_HTTP_UPSTREAM_FT_NOLIVE;
      }
  
      if (conf->upstream.cache_methods == 0) {
          conf->upstream.cache_methods = prev->upstream.cache_methods;
      }
  
      conf->upstream.cache_methods |= NGX_HTTP_GET|NGX_HTTP_HEAD;
  
      ngx_conf_merge_ptr_value(conf->upstream.cache_bypass,
                               prev->upstream.cache_bypass, NULL);
  
      ngx_conf_merge_ptr_value(conf->upstream.no_cache,
                               prev->upstream.no_cache, NULL);
  
      if (conf->upstream.no_cache && conf->upstream.cache_bypass == NULL) {
          ngx_log_error(NGX_LOG_WARN, cf->log, 0,
               "\"fastcgi_no_cache\" functionality has been changed in 0.8.46, "
               "now it should be used together with \"fastcgi_cache_bypass\"");
      }
  
      ngx_conf_merge_ptr_value(conf->upstream.cache_valid,
                               prev->upstream.cache_valid, NULL);
  
      if (conf->cache_key.value.data == NULL) {
          conf->cache_key = prev->cache_key;
      }
  
      ngx_conf_merge_value(conf->upstream.cache_lock,
                                prev->upstream.cache_lock, 0);
  
      ngx_conf_merge_msec_value(conf->upstream.cache_lock_timeout,
                                prev->upstream.cache_lock_timeout, 5000);
  
  #endif
  
      ngx_conf_merge_value(conf->upstream.pass_request_headers,
                                prev->upstream.pass_request_headers, 1);
      ngx_conf_merge_value(conf->upstream.pass_request_body,
                                prev->upstream.pass_request_body, 1);
  
      ngx_conf_merge_value(conf->upstream.intercept_errors,
                                prev->upstream.intercept_errors, 0);
  
      ngx_conf_merge_ptr_value(conf->catch_stderr, prev->catch_stderr, NULL);
  
      ngx_conf_merge_value(conf->keep_conn, prev->keep_conn, 0);
  
  
      ngx_conf_merge_str_value(conf->index, prev->index, "");
  
      hash.max_size = 512;
      hash.bucket_size = ngx_align(64, ngx_cacheline_size);
      hash.name = "fastcgi_hide_headers_hash";
  
      if (ngx_http_upstream_hide_headers_hash(cf, &conf->upstream,
               &prev->upstream, ngx_http_fastcgi_hide_headers, &hash)
          != NGX_OK)
      {
          return NGX_CONF_ERROR;
      }
  
      if (conf->upstream.upstream == NULL) {
          conf->upstream.upstream = prev->upstream.upstream;
      }
  
      if (conf->fastcgi_lengths == NULL) {
          conf->fastcgi_lengths = prev->fastcgi_lengths;
          conf->fastcgi_values = prev->fastcgi_values;
      }
  
      if (conf->upstream.upstream || conf->fastcgi_lengths) {
          clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
          if (clcf->handler == NULL && clcf->lmt_excpt) {
              clcf->handler = ngx_http_fastcgi_handler;
          }
      }
  
  #if (NGX_PCRE)
      if (conf->split_regex == NULL) {
          conf->split_regex = prev->split_regex;
          conf->split_name = prev->split_name;
      }
  #endif
  
      if (ngx_http_fastcgi_merge_params(cf, conf, prev) != NGX_OK) {
          return NGX_CONF_ERROR;
      }
  
      return NGX_CONF_OK;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_merge_params(ngx_conf_t *cf,
      ngx_http_fastcgi_loc_conf_t *conf, ngx_http_fastcgi_loc_conf_t *prev)
  {
      u_char                       *p;
      size_t                        size;
      uintptr_t                    *code;
      ngx_uint_t                    i, nsrc;
      ngx_array_t                   headers_names;
  #if (NGX_HTTP_CACHE)
      ngx_array_t                   params_merged;
  #endif
      ngx_hash_key_t               *hk;
      ngx_hash_init_t               hash;
      ngx_http_upstream_param_t    *src;
      ngx_http_script_compile_t     sc;
      ngx_http_script_copy_code_t  *copy;
  
      if (conf->params_source == NULL) {
          conf->params_source = prev->params_source;
  
          if (prev->headers_hash.buckets
  #if (NGX_HTTP_CACHE)
              && ((conf->upstream.cache == NULL)
                  == (prev->upstream.cache == NULL))
  #endif
             )
          {
              conf->flushes = prev->flushes;
              conf->params_len = prev->params_len;
              conf->params = prev->params;
              conf->headers_hash = prev->headers_hash;
              conf->header_params = prev->header_params;
  
              return NGX_OK;
          }
      }
  
      if (conf->params_source == NULL
  #if (NGX_HTTP_CACHE)
          && (conf->upstream.cache == NULL)
  #endif
         )
      {
          conf->headers_hash.buckets = (void *) 1;
          return NGX_OK;
      }
  
      conf->params_len = ngx_array_create(cf->pool, 64, 1);
      if (conf->params_len == NULL) {
          return NGX_ERROR;
      }
  
      conf->params = ngx_array_create(cf->pool, 512, 1);
      if (conf->params == NULL) {
          return NGX_ERROR;
      }
  
      if (ngx_array_init(&headers_names, cf->temp_pool, 4, sizeof(ngx_hash_key_t))
          != NGX_OK)
      {
          return NGX_ERROR;
      }
  
      if (conf->params_source) {
          src = conf->params_source->elts;
          nsrc = conf->params_source->nelts;
  
      } else {
          src = NULL;
          nsrc = 0;
      }
  
  #if (NGX_HTTP_CACHE)
  
      if (conf->upstream.cache) {
          ngx_keyval_t               *h;
          ngx_http_upstream_param_t  *s;
  
          if (ngx_array_init(&params_merged, cf->temp_pool, 4,
                             sizeof(ngx_http_upstream_param_t))
              != NGX_OK)
          {
              return NGX_ERROR;
          }
  
          for (i = 0; i < nsrc; i++) {
  
              s = ngx_array_push(&params_merged);
              if (s == NULL) {
                  return NGX_ERROR;
              }
  
              *s = src[i];
          }
  
          h = ngx_http_fastcgi_cache_headers;
  
          while (h->key.len) {
  
              src = params_merged.elts;
              nsrc = params_merged.nelts;
  
              for (i = 0; i < nsrc; i++) {
                  if (ngx_strcasecmp(h->key.data, src[i].key.data) == 0) {
                      goto next;
                  }
              }
  
              s = ngx_array_push(&params_merged);
              if (s == NULL) {
                  return NGX_ERROR;
              }
  
              s->key = h->key;
              s->value = h->value;
              s->skip_empty = 0;
  
          next:
  
              h++;
          }
  
          src = params_merged.elts;
          nsrc = params_merged.nelts;
      }
  
  #endif
  
      for (i = 0; i < nsrc; i++) {
  
          if (src[i].key.len > sizeof("HTTP_") - 1
              && ngx_strncmp(src[i].key.data, "HTTP_", sizeof("HTTP_") - 1) == 0)
          {
              hk = ngx_array_push(&headers_names);
              if (hk == NULL) {
                  return NGX_ERROR;
              }
  
              hk->key.len = src[i].key.len - 5;
              hk->key.data = src[i].key.data + 5;
              hk->key_hash = ngx_hash_key_lc(hk->key.data, hk->key.len);
              hk->value = (void *) 1;
  
              if (src[i].value.len == 0) {
                  continue;
              }
          }
  
          copy = ngx_array_push_n(conf->params_len,
                                  sizeof(ngx_http_script_copy_code_t));
          if (copy == NULL) {
              return NGX_ERROR;
          }
  
          copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code;
          copy->len = src[i].key.len;
  
          copy = ngx_array_push_n(conf->params_len,
                                  sizeof(ngx_http_script_copy_code_t));
          if (copy == NULL) {
              return NGX_ERROR;
          }
  
          copy->code = (ngx_http_script_code_pt) ngx_http_script_copy_len_code;
          copy->len = src[i].skip_empty;
  
  
          size = (sizeof(ngx_http_script_copy_code_t)
                  + src[i].key.len + sizeof(uintptr_t) - 1)
                 & ~(sizeof(uintptr_t) - 1);
  
          copy = ngx_array_push_n(conf->params, size);
          if (copy == NULL) {
              return NGX_ERROR;
          }
  
          copy->code = ngx_http_script_copy_code;
          copy->len = src[i].key.len;
  
          p = (u_char *) copy + sizeof(ngx_http_script_copy_code_t);
          ngx_memcpy(p, src[i].key.data, src[i].key.len);
  
  
          ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
  
          sc.cf = cf;
          sc.source = &src[i].value;
          sc.flushes = &conf->flushes;
          sc.lengths = &conf->params_len;
          sc.values = &conf->params;
  
          if (ngx_http_script_compile(&sc) != NGX_OK) {
              return NGX_ERROR;
          }
  
          code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
          if (code == NULL) {
              return NGX_ERROR;
          }
  
          *code = (uintptr_t) NULL;
  
  
          code = ngx_array_push_n(conf->params, sizeof(uintptr_t));
          if (code == NULL) {
              return NGX_ERROR;
          }
  
          *code = (uintptr_t) NULL;
      }
  
      code = ngx_array_push_n(conf->params_len, sizeof(uintptr_t));
      if (code == NULL) {
          return NGX_ERROR;
      }
  
      *code = (uintptr_t) NULL;
  
      conf->header_params = headers_names.nelts;
  
      hash.hash = &conf->headers_hash;
      hash.key = ngx_hash_key_lc;
      hash.max_size = 512;
      hash.bucket_size = 64;
      hash.name = "fastcgi_params_hash";
      hash.pool = cf->pool;
      hash.temp_pool = NULL;
  
      return ngx_hash_init(&hash, headers_names.elts, headers_names.nelts);
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_script_name_variable(ngx_http_request_t *r,
      ngx_http_variable_value_t *v, uintptr_t data)
  {
      u_char                       *p;
      ngx_http_fastcgi_ctx_t       *f;
      ngx_http_fastcgi_loc_conf_t  *flcf;
  
      flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
      f = ngx_http_fastcgi_split(r, flcf);
  
      if (f == NULL) {
          return NGX_ERROR;
      }
  
      if (f->script_name.len == 0
          || f->script_name.data[f->script_name.len - 1] != '/')
      {
          v->len = f->script_name.len;
          v->valid = 1;
          v->no_cacheable = 0;
          v->not_found = 0;
          v->data = f->script_name.data;
  
          return NGX_OK;
      }
  
      v->len = f->script_name.len + flcf->index.len;
  
      v->data = ngx_pnalloc(r->pool, v->len);
      if (v->data == NULL) {
          return NGX_ERROR;
      }
  
      p = ngx_copy(v->data, f->script_name.data, f->script_name.len);
      ngx_memcpy(p, flcf->index.data, flcf->index.len);
  
      return NGX_OK;
  }
  
  
  static ngx_int_t
  ngx_http_fastcgi_path_info_variable(ngx_http_request_t *r,
      ngx_http_variable_value_t *v, uintptr_t data)
  {
      ngx_http_fastcgi_ctx_t       *f;
      ngx_http_fastcgi_loc_conf_t  *flcf;
  
      flcf = ngx_http_get_module_loc_conf(r, ngx_http_fastcgi_module);
  
      f = ngx_http_fastcgi_split(r, flcf);
  
      if (f == NULL) {
          return NGX_ERROR;
      }
  
      v->len = f->path_info.len;
      v->valid = 1;
      v->no_cacheable = 0;
      v->not_found = 0;
      v->data = f->path_info.data;
  
      return NGX_OK;
  }
  
  
  static ngx_http_fastcgi_ctx_t *
  ngx_http_fastcgi_split(ngx_http_request_t *r, ngx_http_fastcgi_loc_conf_t *flcf)
  {
      ngx_http_fastcgi_ctx_t       *f;
  #if (NGX_PCRE)
      ngx_int_t                     n;
      int                           captures[(1 + 2) * 3];
  
      f = ngx_http_get_module_ctx(r, ngx_http_fastcgi_module);
  
      if (f == NULL) {
          f = ngx_pcalloc(r->pool, sizeof(ngx_http_fastcgi_ctx_t));
          if (f == NULL) {
              return NULL;
          }
  
          ngx_http_set_ctx(r, f, ngx_http_fastcgi_module);
      }
  
      if (f->script_name.len) {
          return f;
      }
  
      if (flcf->split_regex == NULL) {
          f->script_name = r->uri;
          return f;
      }
  
      n = ngx_regex_exec(flcf->split_regex, &r->uri, captures, (1 + 2) * 3);
  
      if (n >= 0) { /* match */
          f->script_name.len = captures[3] - captures[2];
          f->script_name.data = r->uri.data + captures[2];
  
          f->path_info.len = captures[5] - captures[4];
          f->path_info.data = r->uri.data + captures[4];
  
          return f;
      }
  
      if (n == NGX_REGEX_NO_MATCHED) {
          f->script_name = r->uri;
          return f;
      }
  
      ngx_log_error(NGX_LOG_ALERT, r->connection->log, 0,
                    ngx_regex_exec_n " failed: %i on \"%V\" using \"%V\"",
                    n, &r->uri, &flcf->split_name);
      return NULL;
  
  #else
  
      f = ngx_http_get_module_ctx(r, ngx_http_fastcgi_module);
  
      if (f == NULL) {
          f = ngx_pcalloc(r->pool, sizeof(ngx_http_fastcgi_ctx_t));
          if (f == NULL) {
              return NULL;
          }
  
          ngx_http_set_ctx(r, f, ngx_http_fastcgi_module);
      }
  
      f->script_name = r->uri;
  
      return f;
  
  #endif
  }
  
  
  static char *
  ngx_http_fastcgi_pass(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
  {
      ngx_http_fastcgi_loc_conf_t *flcf = conf;
  
      ngx_url_t                   u;
      ngx_str_t                  *value, *url;
      ngx_uint_t                  n;
      ngx_http_core_loc_conf_t   *clcf;
      ngx_http_script_compile_t   sc;
  
      if (flcf->upstream.upstream || flcf->fastcgi_lengths) {
          return "is duplicate";
      }
  
      clcf = ngx_http_conf_get_module_loc_conf(cf, ngx_http_core_module);
  
      clcf->handler = ngx_http_fastcgi_handler;
  
      if (clcf->name.data[clcf->name.len - 1] == '/') {
          clcf->auto_redirect = 1;
      }
  
      value = cf->args->elts;
  
      url = &value[1];
  
      n = ngx_http_script_variables_count(url);
  
      if (n) {
  
          ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
  
          sc.cf = cf;
          sc.source = url;
          sc.lengths = &flcf->fastcgi_lengths;
          sc.values = &flcf->fastcgi_values;
          sc.variables = n;
          sc.complete_lengths = 1;
          sc.complete_values = 1;
  
          if (ngx_http_script_compile(&sc) != NGX_OK) {
              return NGX_CONF_ERROR;
          }
  
          return NGX_CONF_OK;
      }
  
      ngx_memzero(&u, sizeof(ngx_url_t));
  
      u.url = value[1];
      u.no_resolve = 1;
  
      flcf->upstream.upstream = ngx_http_upstream_add(cf, &u, 0);
      if (flcf->upstream.upstream == NULL) {
          return NGX_CONF_ERROR;
      }
  
      return NGX_CONF_OK;
  }
  
  
  static char *
  ngx_http_fastcgi_split_path_info(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
  {
  #if (NGX_PCRE)
      ngx_http_fastcgi_loc_conf_t *flcf = conf;
  
      ngx_str_t            *value;
      ngx_regex_compile_t   rc;
      u_char                errstr[NGX_MAX_CONF_ERRSTR];
  
      value = cf->args->elts;
  
      flcf->split_name = value[1];
  
      ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
  
      rc.pattern = value[1];
      rc.pool = cf->pool;
      rc.err.len = NGX_MAX_CONF_ERRSTR;
      rc.err.data = errstr;
  
      if (ngx_regex_compile(&rc) != NGX_OK) {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "%V", &rc.err);
          return NGX_CONF_ERROR;
      }
  
      if (rc.captures != 2) {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                             "pattern \"%V\" must have 2 captures", &value[1]);
          return NGX_CONF_ERROR;
      }
  
      flcf->split_regex = rc.regex;
  
      return NGX_CONF_OK;
  
  #else
  
      ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                         "\"%V\" requires PCRE library", &cmd->name);
      return NGX_CONF_ERROR;
  
  #endif
  }
  
  
  static char *
  ngx_http_fastcgi_store(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
  {
      ngx_http_fastcgi_loc_conf_t *flcf = conf;
  
      ngx_str_t                  *value;
      ngx_http_script_compile_t   sc;
  
      if (flcf->upstream.store != NGX_CONF_UNSET
          || flcf->upstream.store_lengths)
      {
          return "is duplicate";
      }
  
      value = cf->args->elts;
  
      if (ngx_strcmp(value[1].data, "off") == 0) {
          flcf->upstream.store = 0;
          return NGX_CONF_OK;
      }
  
  #if (NGX_HTTP_CACHE)
  
      if (flcf->upstream.cache != NGX_CONF_UNSET_PTR
          && flcf->upstream.cache != NULL)
      {
          return "is incompatible with \"fastcgi_cache\"";
      }
  
  #endif
  
      if (ngx_strcmp(value[1].data, "on") == 0) {
          flcf->upstream.store = 1;
          return NGX_CONF_OK;
      }
  
      /* include the terminating '\0' into script */
      value[1].len++;
  
      ngx_memzero(&sc, sizeof(ngx_http_script_compile_t));
  
      sc.cf = cf;
      sc.source = &value[1];
      sc.lengths = &flcf->upstream.store_lengths;
      sc.values = &flcf->upstream.store_values;
      sc.variables = ngx_http_script_variables_count(&value[1]);
      sc.complete_lengths = 1;
      sc.complete_values = 1;
  
      if (ngx_http_script_compile(&sc) != NGX_OK) {
          return NGX_CONF_ERROR;
      }
  
      return NGX_CONF_OK;
  }
  
  
  #if (NGX_HTTP_CACHE)
  
  static char *
  ngx_http_fastcgi_cache(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
  {
      ngx_http_fastcgi_loc_conf_t *flcf = conf;
  
      ngx_str_t  *value;
  
      value = cf->args->elts;
  
      if (flcf->upstream.cache != NGX_CONF_UNSET_PTR) {
          return "is duplicate";
      }
  
      if (ngx_strcmp(value[1].data, "off") == 0) {
          flcf->upstream.cache = NULL;
          return NGX_CONF_OK;
      }
  
      if (flcf->upstream.store > 0 || flcf->upstream.store_lengths) {
          return "is incompatible with \"fastcgi_store\"";
      }
  
      flcf->upstream.cache = ngx_shared_memory_add(cf, &value[1], 0,
                                                   &ngx_http_fastcgi_module);
      if (flcf->upstream.cache == NULL) {
          return NGX_CONF_ERROR;
      }
  
      return NGX_CONF_OK;
  }
  
  
  static char *
  ngx_http_fastcgi_cache_key(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
  {
      ngx_http_fastcgi_loc_conf_t *flcf = conf;
  
      ngx_str_t                         *value;
      ngx_http_compile_complex_value_t   ccv;
  
      value = cf->args->elts;
  
      if (flcf->cache_key.value.data) {
          return "is duplicate";
      }
  
      ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
  
      ccv.cf = cf;
      ccv.value = &value[1];
      ccv.complex_value = &flcf->cache_key;
  
      if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
          return NGX_CONF_ERROR;
      }
  
      return NGX_CONF_OK;
  }
  
  #endif
  
  
  static char *
  ngx_http_fastcgi_lowat_check(ngx_conf_t *cf, void *post, void *data)
  {
  #if (NGX_FREEBSD)
      ssize_t *np = data;
  
      if ((u_long) *np >= ngx_freebsd_net_inet_tcp_sendspace) {
          ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
                             "\"fastcgi_send_lowat\" must be less than %d "
                             "(sysctl net.inet.tcp.sendspace)",
                             ngx_freebsd_net_inet_tcp_sendspace);
  
          return NGX_CONF_ERROR;
      }
  
  #elif !(NGX_HAVE_SO_SNDLOWAT)
      ssize_t *np = data;
  
      ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
                         "\"fastcgi_send_lowat\" is not supported, ignored");
  
      *np = 0;
  
  #endif
  
      return NGX_CONF_OK;
  }
  