Go语言http请求计算文件md5

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package main

import (
"crypto/md5"
"encoding/hex"
"fmt"
"io"
"net/http"
"strconv"
)

func main() {
ret, err := download("http://....")
if err != nil {
fmt.Println(err)
}
fmt.Println(ret)
}

func download(url string) (string, error) {
var (
err error
resp *http.Response
contentLen int64
downloadLen int
)
if resp, err = http.Get(url); err != nil {
return "", err
}

if contentLen, err = strconv.ParseInt(resp.Header.Get("Content-Length"), 10, 64); err != nil {
return "", err
}

defer func() {
_ = resp.Body.Close()
fmt.Print("\n")
}()

h := md5.New()
for {
buf := make([]byte, 1024)
c, e := resp.Body.Read(buf)
if e != nil && e != io.EOF {
return "", e
}
downloadLen += c

printProgress(downloadLen, contentLen)

h.Write(buf[0:c])

if e != nil && e == io.EOF {
break
}
}
return hex.EncodeToString(h.Sum(nil)), nil
}

func printProgress(downloadLen int, contentLen int64) {
fmt.Printf("\r")
fmt.Printf("Downloading... %d of %d", downloadLen, contentLen)
}
作者

雾非雾的情思

发布于

2022-01-12

更新于

2022-08-11

许可协议

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