Go HTTP 服务器在Windows平台的并发性能：早期版本限制与跨平台考量

package main

import (
    "fmt"
    "io"
    "net/http" // 注意：Go 1.0后，http包移至net/http
    "os"
    "strconv"
)

// FileTest 处理文件下载请求
func FileTest(w http.ResponseWriter, req *http.Request) {
    w.Header().Add("Content-Type", "image/jpeg")
    w.Header().Add("Content-Disposition", "inline; filename=image.jpg")
    inName := "d:\googlego\somepic.jpg" // 假设文件路径
    inFile, inErr := os.OpenFile(inName, os.O_RDONLY, 0666)
    if inErr == nil {
        inBufLen := 16
        inBuf := make([]byte, inBufLen)

        // 循环读取文件并写入响应
        for {
            n, readErr := inFile.Read(inBuf)
            if n > 0 {
                w.Write(inBuf[:n])
            }
            if readErr == io.EOF {
                break // 文件读取完毕
            }
            if readErr != nil {
                fmt.Printf("Error reading file: %v
", readErr)
                break
            }
        }
    } else {
        fmt.Printf("Error opening file: %v
", inErr)
        http.Error(w, "File not found", http.StatusNotFound)
    }
    // 确保文件关闭
    if inFile != nil {
        closeErr := inFile.Close()
        if closeErr != nil {
            fmt.Printf("Error closing file: %v
", closeErr)
        }
    }
}

// MainPage 处理主页请求
func MainPage(w http.ResponseWriter, req *http.Request) {
    io.WriteString(w, "Hi, download here: <a href="/FileTest">HERE</a>")
}

func main() {
    fmt.Print("Port: ")
    var port int
    fmt.Scanf("%d", &port)

    // 注册请求处理器
    http.HandleFunc("/FileTest", FileTest)
    http.HandleFunc("/", MainPage)

    // 启动HTTP服务器
    addr := "0.0.0.0:" + strconv.Itoa(port)
    fmt.Printf("Server starting on %s...
", addr)
    err := http.ListenAndServe(addr, nil)

    if err != nil {
        fmt.Printf("Server failed to start: %v
", err)
    }
}

Concurrency Level:      6
Time taken for tests:   1.678096 seconds
Complete requests:      10000
Percentage of the requests served within a certain time (ms)
  50%      1
  ...
 100%      3 (longest request)

Concurrency Level:      7
Time taken for tests:   10.239586 seconds
Complete requests:      1000
Percentage of the requests served within a certain time (ms)
  50%      1
  ...
 90%    499
 95%    505
 98%    507
 99%    507
 100%    510 (longest request)