hunk.code_window: )
   type httpResponseWriterRPCServer struct {
   	w http.ResponseWriter
   }
   func (w *httpResponseWriterRPCServer) Header(args struct{}, reply *http.Header) error {
   	*reply = w.w.Header()
   	return nil
  
hunk.labels: keep keep keep replace keep keep keep keep keep
hunk.after_edit: 	w   http.ResponseWriter
   	log *mlog.Logger
  
hunk.file_path: plugin/http.go
hunk.type: replace
file: // Copyright 2018 The Prometheus Authors
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  package procfs
  
  import (
  	"bufio"
  	"fmt"
  	"io"
  	"os"
  	"strconv"
  	"strings"
  
  	"github.com/prometheus/procfs/internal/fs"
  )
  
  // CPUStat shows how much time the cpu spend in various stages.
  type CPUStat struct {
  	User      float64
  	Nice      float64
  	System    float64
  	Idle      float64
  	Iowait    float64
  	IRQ       float64
  	SoftIRQ   float64
  	Steal     float64
  	Guest     float64
  	GuestNice float64
  }
  
  // SoftIRQStat represent the softirq statistics as exported in the procfs stat file.
  // A nice introduction can be found at https://0xax.gitbooks.io/linux-insides/content/interrupts/interrupts-9.html
  // It is possible to get per-cpu stats by reading /proc/softirqs
  type SoftIRQStat struct {
  	Hi          uint64
  	Timer       uint64
  	NetTx       uint64
  	NetRx       uint64
  	Block       uint64
  	BlockIoPoll uint64
  	Tasklet     uint64
  	Sched       uint64
  	Hrtimer     uint64
  	Rcu         uint64
  }
  
  // Stat represents kernel/system statistics.
  type Stat struct {
  	// Boot time in seconds since the Epoch.
  	BootTime uint64
  	// Summed up cpu statistics.
  	CPUTotal CPUStat
  	// Per-CPU statistics.
  	CPU []CPUStat
  	// Number of times interrupts were handled, which contains numbered and unnumbered IRQs.
  	IRQTotal uint64
  	// Number of times a numbered IRQ was triggered.
  	IRQ []uint64
  	// Number of times a context switch happened.
  	ContextSwitches uint64
  	// Number of times a process was created.
  	ProcessCreated uint64
  	// Number of processes currently running.
  	ProcessesRunning uint64
  	// Number of processes currently blocked (waiting for IO).
  	ProcessesBlocked uint64
  	// Number of times a softirq was scheduled.
  	SoftIRQTotal uint64
  	// Detailed softirq statistics.
  	SoftIRQ SoftIRQStat
  }
  
  // Parse a cpu statistics line and returns the CPUStat struct plus the cpu id (or -1 for the overall sum).
  func parseCPUStat(line string) (CPUStat, int64, error) {
  	cpuStat := CPUStat{}
  	var cpu string
  
  	count, err := fmt.Sscanf(line, "%s %f %f %f %f %f %f %f %f %f %f",
  		&cpu,
  		&cpuStat.User, &cpuStat.Nice, &cpuStat.System, &cpuStat.Idle,
  		&cpuStat.Iowait, &cpuStat.IRQ, &cpuStat.SoftIRQ, &cpuStat.Steal,
  		&cpuStat.Guest, &cpuStat.GuestNice)
  
  	if err != nil && err != io.EOF {
  		return CPUStat{}, -1, fmt.Errorf("couldn't parse %s (cpu): %s", line, err)
  	}
  	if count == 0 {
  		return CPUStat{}, -1, fmt.Errorf("couldn't parse %s (cpu): 0 elements parsed", line)
  	}
  
  	cpuStat.User /= userHZ
  	cpuStat.Nice /= userHZ
  	cpuStat.System /= userHZ
  	cpuStat.Idle /= userHZ
  	cpuStat.Iowait /= userHZ
  	cpuStat.IRQ /= userHZ
  	cpuStat.SoftIRQ /= userHZ
  	cpuStat.Steal /= userHZ
  	cpuStat.Guest /= userHZ
  	cpuStat.GuestNice /= userHZ
  
  	if cpu == "cpu" {
  		return cpuStat, -1, nil
  	}
  
  	cpuID, err := strconv.ParseInt(cpu[3:], 10, 64)
  	if err != nil {
  		return CPUStat{}, -1, fmt.Errorf("couldn't parse %s (cpu/cpuid): %s", line, err)
  	}
  
  	return cpuStat, cpuID, nil
  }
  
  // Parse a softirq line.
  func parseSoftIRQStat(line string) (SoftIRQStat, uint64, error) {
  	softIRQStat := SoftIRQStat{}
  	var total uint64
  	var prefix string
  
  	_, err := fmt.Sscanf(line, "%s %d %d %d %d %d %d %d %d %d %d %d",
  		&prefix, &total,
  		&softIRQStat.Hi, &softIRQStat.Timer, &softIRQStat.NetTx, &softIRQStat.NetRx,
  		&softIRQStat.Block, &softIRQStat.BlockIoPoll,
  		&softIRQStat.Tasklet, &softIRQStat.Sched,
  		&softIRQStat.Hrtimer, &softIRQStat.Rcu)
  
  	if err != nil {
  		return SoftIRQStat{}, 0, fmt.Errorf("couldn't parse %s (softirq): %s", line, err)
  	}
  
  	return softIRQStat, total, nil
  }
  
  // NewStat returns information about current cpu/process statistics.
  // See https://www.kernel.org/doc/Documentation/filesystems/proc.txt
  //
  // Deprecated: use fs.Stat() instead
  func NewStat() (Stat, error) {
  	fs, err := NewFS(fs.DefaultProcMountPoint)
  	if err != nil {
  		return Stat{}, err
  	}
  	return fs.Stat()
  }
  
  // NewStat returns information about current cpu/process statistics.
  // See https://www.kernel.org/doc/Documentation/filesystems/proc.txt
  //
  // Deprecated: use fs.Stat() instead
  func (fs FS) NewStat() (Stat, error) {
  	return fs.Stat()
  }
  
  // Stat returns information about current cpu/process statistics.
  // See https://www.kernel.org/doc/Documentation/filesystems/proc.txt
  func (fs FS) Stat() (Stat, error) {
  
  	f, err := os.Open(fs.proc.Path("stat"))
  	if err != nil {
  		return Stat{}, err
  	}
  	defer f.Close()
  
  	stat := Stat{}
  
  	scanner := bufio.NewScanner(f)
  	for scanner.Scan() {
  		line := scanner.Text()
  		parts := strings.Fields(scanner.Text())
  		// require at least <key> <value>
  		if len(parts) < 2 {
  			continue
  		}
  		switch {
  		case parts[0] == "btime":
  			if stat.BootTime, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
  				return Stat{}, fmt.Errorf("couldn't parse %s (btime): %s", parts[1], err)
  			}
  		case parts[0] == "intr":
  			if stat.IRQTotal, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
  				return Stat{}, fmt.Errorf("couldn't parse %s (intr): %s", parts[1], err)
  			}
  			numberedIRQs := parts[2:]
  			stat.IRQ = make([]uint64, len(numberedIRQs))
  			for i, count := range numberedIRQs {
  				if stat.IRQ[i], err = strconv.ParseUint(count, 10, 64); err != nil {
  					return Stat{}, fmt.Errorf("couldn't parse %s (intr%d): %s", count, i, err)
  				}
  			}
  		case parts[0] == "ctxt":
  			if stat.ContextSwitches, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
  				return Stat{}, fmt.Errorf("couldn't parse %s (ctxt): %s", parts[1], err)
  			}
  		case parts[0] == "processes":
  			if stat.ProcessCreated, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
  				return Stat{}, fmt.Errorf("couldn't parse %s (processes): %s", parts[1], err)
  			}
  		case parts[0] == "procs_running":
  			if stat.ProcessesRunning, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
  				return Stat{}, fmt.Errorf("couldn't parse %s (procs_running): %s", parts[1], err)
  			}
  		case parts[0] == "procs_blocked":
  			if stat.ProcessesBlocked, err = strconv.ParseUint(parts[1], 10, 64); err != nil {
  				return Stat{}, fmt.Errorf("couldn't parse %s (procs_blocked): %s", parts[1], err)
  			}
  		case parts[0] == "softirq":
  			softIRQStats, total, err := parseSoftIRQStat(line)
  			if err != nil {
  				return Stat{}, err
  			}
  			stat.SoftIRQTotal = total
  			stat.SoftIRQ = softIRQStats
  		case strings.HasPrefix(parts[0], "cpu"):
  			cpuStat, cpuID, err := parseCPUStat(line)
  			if err != nil {
  				return Stat{}, err
  			}
  			if cpuID == -1 {
  				stat.CPUTotal = cpuStat
  			} else {
  				for int64(len(stat.CPU)) <= cpuID {
  					stat.CPU = append(stat.CPU, CPUStat{})
  				}
  				stat.CPU[cpuID] = cpuStat
  			}
  		}
  	}
  
  	if err := scanner.Err(); err != nil {
  		return Stat{}, fmt.Errorf("couldn't parse %s: %s", f.Name(), err)
  	}
  
  	return stat, nil
  }
  