func: static void process_client(AVIOContext *client, const char *in_uri)
  
  {
  
      AVIOContext *input = NULL;
  
      uint8_t buf[1024];
  
      int ret, n, reply_code;
  
      uint8_t *resource = NULL;
  
      while ((ret = avio_handshake(client)) > 0) {
  
          av_opt_get(client, "resource", AV_OPT_SEARCH_CHILDREN, &resource);
  
          // check for strlen(resource) is necessary, because av_opt_get()
  
          // may return empty string.
  
          if (resource && strlen(resource))
  
              break;
  
  
      }
  
      if (ret < 0)
  
          goto end;
  
      av_log(client, AV_LOG_TRACE, "resource=%p\n", resource);
  
      if (resource && resource[0] == '/' && !strcmp((resource + 1), in_uri)) {
  
          reply_code = 200;
  
      } else {
  
          reply_code = AVERROR_HTTP_NOT_FOUND;
  
      }
  
      if ((ret = av_opt_set_int(client, "reply_code", reply_code, AV_OPT_SEARCH_CHILDREN)) < 0) {
  
          av_log(client, AV_LOG_ERROR, "Failed to set reply_code: %s.\n", av_err2str(ret));
  
          goto end;
  
      }
  
      av_log(client, AV_LOG_TRACE, "Set reply code to %d\n", reply_code);
  
  
  
      while ((ret = avio_handshake(client)) > 0);
  
  
  
      if (ret < 0)
  
          goto end;
  
  
  
      fprintf(stderr, "Handshake performed.\n");
  
      if (reply_code != 200)
  
          goto end;
  
      fprintf(stderr, "Opening input file.\n");
  
      if ((ret = avio_open2(&input, in_uri, AVIO_FLAG_READ, NULL, NULL)) < 0) {
  
          av_log(input, AV_LOG_ERROR, "Failed to open input: %s: %s.\n", in_uri,
  
                 av_err2str(ret));
  
          goto end;
  
      }
  
      for(;;) {
  
          n = avio_read(input, buf, sizeof(buf));
  
          if (n < 0) {
  
              if (n == AVERROR_EOF)
  
                  break;
  
              av_log(input, AV_LOG_ERROR, "Error reading from input: %s.\n",
  
                     av_err2str(n));
  
              break;
  
          }
  
          avio_write(client, buf, n);
  
          avio_flush(client);
  
      }
  
  end:
  
      fprintf(stderr, "Flushing client\n");
  
      avio_flush(client);
  
      fprintf(stderr, "Closing client\n");
  
      avio_close(client);
  
      fprintf(stderr, "Closing input\n");
  
      avio_close(input);
  
  
  }