英文:
How do you specify the http referrer in golang?
问题
使用标准的http.Client，您可以如下构建一个包含引用来源的Web请求：
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return "", err
}
req.Header.Set("Accept", "text/html,application/xhtml+xml")
req.Header.Set("User-Agent", "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1)")
req.Header.Set("Referer", "http://example.com")
response, err1 := client.Do(req)
if err1 != nil {
return "", err1
}
在上述代码中，通过调用req.Header.Set("Referer", "http://example.com")来设置引用来源。然后，您可以使用client.Do(req)来发送请求并获取响应。
英文:
Using the standard http.Client, how do you build a web request that specifies a referrer in the http request header?
Below you can see it is possible to set headers, but how do you specify the referer? Is it just by setting a Referer header?
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return "", err
}
req.Header.Set("Accept", "text/html,application/xhtml+xml")
req.Header.Set("User-Agent", "User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_1)")
response, err1 := client.Get(url)
if err1 != nil {
return "", err1
}
答案1
得分: 8
是的，根据Go本身的源代码，可以看到在src/net/http/client.go中有以下内容：
// 如果不是https->http，则将最近的请求URL的Referer头添加到新的请求中
if ref := refererForURL(reqs[len(reqs)-1].URL, req.URL); ref != "" {
req.Header.Set("Referer", ref)
}
但是请注意你的scheme，在同样的源代码中有以下内容：
// refererForURL函数返回一个不包含任何身份验证信息的referer，
// 如果lastReq的scheme是https且newReq的scheme是http，则返回空字符串
func refererForURL(lastReq, newReq *url.URL) string {
// https://tools.ietf.org/html/rfc7231#section-5.5.2
// "如果引用页面是通过安全协议传输的，则在（非安全的）HTTP请求中，
// 客户端不应包含Referer头字段。"
if lastReq.Scheme == "https" && newReq.Scheme == "http" {
return ""
}
英文:
Yes, as you can see from the sources from Go itself, in src/net/http/client.go
// Add the Referer header from the most recent
// request URL to the new one, if it's not https->http:
if ref := refererForURL(reqs[len(reqs)-1].URL, req.URL); ref != "" {
req.Header.Set("Referer", ref)
}
Check your scheme though, as in the same sources:
// refererForURL returns a referer without any authentication info or
// an empty string if lastReq scheme is https and newReq scheme is http.
func refererForURL(lastReq, newReq *url.URL) string {
// https://tools.ietf.org/html/rfc7231#section-5.5.2
// "Clients SHOULD NOT include a Referer header field in a
// (non-secure) HTTP request if the referring page was
// transferred with a secure protocol."
if lastReq.Scheme == "https" && newReq.Scheme == "http" {
return ""
}
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