Get, Head, Post, and PostForm 可以构成 HTTP (or HTTPS) requests:
resp, err := http.Get("http://example.com/") ... resp, err := http.Post("http://example.com/upload", "image/jpeg", &buf) ... resp, err := http.PostForm("http://example.com/form", url.Values{"key": {"Value"}, "id": {"123"}})
客户端必须关闭response的body:
resp, err := http.Get("http://example.com/") if err != nil { // handle error } defer resp.Body.Close() body, err := ioutil.ReadAll(resp.Body) // ...
TCP客户端设置超时的方法:
c := http.Client{ Transport: &http.Transport{ Dial: func(netw, addr string) (net.Conn, error) { deadline := time.Now().Add(25 * time.Second) c, err := net.DialTimeout(netw, addr, time.Second*20) if err != nil { return nil, err } c.SetDeadline(deadline) return c, nil }, }, }
一些客户端请求的其他设定：
client := &http.Client{ CheckRedirect: redirectPolicyFunc, } resp, err := client.Get("http://example.com") // ... req, err := http.NewRequest("GET", "http://example.com", nil) // ... req.Header.Add("If-None-Match", `W/"wyzzy"`) resp, err := client.Do(req) // ...
要是想在NewRequest里面带上post数据，就必须传入一个io.Reader的body，这个body如果实现了io.Closer，那么返回的Request.body赋给这个body,然后通过Do或者Post什么的关闭。这个实现了io.Reader的body，基本上是通过构成?a=1&b=2这样的query的url.Values转化的，可以通过url.Values.add和set构建，前者可叠加，后者会覆盖之前的值，url.Values有一个Encode可以转化出相应的query字符串，然后再通过strings.NewReader()转换成io.Reader接口，就行了。还可以通过ioutil.NopCloser返回一个带Closer的io.reader
另外post数据的时候记得带上头:
req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
下面这个还不知道什么意思
For control over proxies, TLS configuration, keep-alives, compression, and other settings, create a Transport:
tr := &http.Transport{ TLSClientConfig: &tls.Config{RootCAs: pool}, DisableCompression: true, } client := &http.Client{Transport: tr} resp, err := client.Get("https://example.com")
具体的一个例子：
package main import ( "fmt" "io/ioutil" "net/http" "net/url" "net" "time" "os" "strings" ) // func nothing() { // fmt.Println("nothing") // client := &http.Client{} // a := strings.Contains("a", "b") // u:=&url.URL{} // r, err := u.Parse("baidu.com") // os.Exit(0) // } const ( LHST = "http://127.0.0.1:3000/" ) func main() { client := &http.Client{ Transport: &http.Transport{ Dial: func(netw, addr string) (net.Conn, error) { deadline := time.Now().Add(25 * time.Second) c, err := net.DialTimeout(netw, addr, time.Second*20) if err != nil { return nil, err } c.SetDeadline(deadline) return c, nil }, }, } form := url.Values{} form.Set("username", "gao") b := strings.NewReader(form.Encode()) req, err := http.NewRequest("POST", LHST+"answer", b) req.Header.Set("Content-Type", "application/x-www-form-urlencoded") res, err := client.Do(req) if err != nil { fmt.Println("Fatal error ", err.Error()) os.Exit(0) } defer res.Body.Close() body,err:=ioutil.ReadAll(res.Body) fmt.Println(string(body)) }
再举个例子
func main() { host := "http://www.minigps.net/l.do?" client := http.Client{} q := url.Values{} q.Set("c", "454") q.Set("n", "6") q.Set("a", "8010") q.Set("e", "6652663") req, _ := http.NewRequest("GET", host+q.Encode(), nil) req.Header.Add("Content-Type","application/json;charset=UTF-8") res, err := client.Do(req) if err != nil { fmt.Println(err) os.Exit(-1) } defer res.Body.Close() body, err := ioutil.ReadAll(res.Body) fmt.Println(string(body)) }
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