Accept-Encoding == “gzip”, 读resp.Body时会自动ungzip吗？

[guagua]

package main


import (
 "fmt"
 "io"
 "net/http"
 "os"
)


func main() {
 req, err := http.NewRequest("GET", "http://www.baidu.com/", nil)
 if err != nil {
 fmt.Println(err)
 return
 }
 req.Header.Add("Accept-Encoding", "gzip,deflate,sdch")


 client := &http.Client{}
 resp, err := client.Do(req)
 if err != nil {
 fmt.Println(err)
 return
 }
 defer resp.Body.Close()


 io.Copy(os.Stdout, resp.Body)
 fmt.Println(resp.Header.Get("Content-Encoding")) //确实是gzip
}

按Transport.DisableCompression的解释，应该会自动ungzip的，但是事实上输出的是压缩的内容。

[yuchen12]

    // DisableCompression, if true, prevents the Transport from
    // requesting compression with an "Accept-Encoding: gzip"
    // request header when the Request contains no existing
    // Accept-Encoding value. If the Transport requests gzip on
    // its own and gets a gzipped response, it's transparently
    // decoded in the Response.Body. However, if the user
    // explicitly requested gzip it is not automatically
    // uncompressed.
�����ʽָ����Accept-Encoding�Ͳ����Զ���ѹ���ˡ�

On 11/12/2013 10:30 AM, guagua wrote:

package main


import (
 "fmt"
 "io"
 "net/http"
 "os"
)


func main() {
 req, err := http.NewRequest("GET", "http://www.baidu.com/", nil)
 if err != nil {
 fmt.Println(err)
 return
 }
 req.Header.Add("Accept-Encoding", "gzip,deflate,sdch")


 client := &http.Client{}
 resp, err := client.Do(req)
 if err != nil {
 fmt.Println(err)
 return
 }
 defer resp.Body.Close()


 io.Copy(os.Stdout, resp.Body)

 fmt.Println(resp.Header.Get("Content-Encoding")) //ȷʵ��gzip
}

��Transport.DisableCompression�Ľ��ͣ�Ӧ �û��Զ�ungzip�ģ�������ʵ���������ѹ�������ݡ�

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Ҫ�鿴���ѡ������ https://groups.google.com /groups/opt_out��

[guagua]

我看到你的是乱码，但是baidu首页也不可能是gzip文件

[guagua]

确实不能显示指定Accept-Encoding，下面是源码：

if !pc.t.DisableCompression && req.Header.Get("Accept-Encoding") == "" && req.Method != "HEAD" {

// Request gzip only, not deflate. Deflate is ambiguous and

// not as universally supported anyway.

// See: http://www.gzip.org/zlib/zlib_faq.html#faq38

//

// Note that we don't request this for HEAD requests,

// due to a bug in nginx:

//   http://trac.nginx.org/nginx/ticket/358

//   http://golang.org/issue/5522

requestedGzip = true

req.extraHeaders().Set("Accept-Encoding", "gzip")

}

http://stackoverflow.com/questions/13130341/reading-gzipped-http-response-in-go