Go语言实现Gz压缩功能及实战教程

package main

import (
"archive/tar"
"bytes"
"compress/gzip"
"fmt"
)

func compressFile(filename string) error {
fileBytes := []byte("这是待压缩的内容") // 用实际读取到的文件内容替换此处字符串

buffer := new(bytes.Buffer)
gzw := gzip.NewWriter(buffer)

if _, err := gzw.Write(fileBytes); err != nil {
return fmt.Errorf("无法写入压缩流: %v", err)
}

if err := gzw.Close(); err != nil {
return fmt.errrorf("关闭gzip writer时出错:%v",err)
}

compressedData := buffer.Bytes()

fmt.Println("成功生成压缩后的数据")

// 这里可以进一步保存为.gzip文件或者发送至网络等其他用途
return nil
}

package main

import(
"io/ioutil"
"net/http"

"github.com/gin-gonic/gin"
"golang.org/x/net/context/ctxhttp"
"compress/gzip"
)

func setupRouter() *gin.Engine{
router:= gin.Default()

router.GET("/data/:filename", func(c *gin.Context){
filename := c.Param("filename")

resp, err := ctxhttp.Get(context.Background(),nil,"./"+ filename )
if err!=nil{c.AbortWithError(http.StatusInternalServerError,err)}

defer resp.Body.Close()

body, readErr := ioutil.ReadAll(resp.Body)
if readErr!=nil{c.AbortWithError(http.StatusInternalServerError,readErr)}

buf := bytes.NewBuffer(body)
gzippedBody := &bytes.Buffer{}

writer := gzip.NewWriter(gzippedBody)
writer.Write(buf.Bytes())
writer.Flush()
writer.Close()

c.Header("Content-Encoding","gzip")
c.DataFromReader(http.StatusOK,nil,gintaro.Size(len(gzippedBody.Bytes())),nil,gzippedBody)
})

return router
}

func main(){
route :=setupRouter()
route.Run(":8080")
}