get請求
get請求可以直接http.Get方法，非常簡單。
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func
httpGet() {
resp, err := http.Get(
"http://www.01happy.com/demo/accept.php?id=1"
)
if
err != nil {
// handle error
}
defer
resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if
err != nil {
// handle error
}
fmt.Println(string(body))
}
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post請求
一種是使用http.Post方式
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func
httpPost() {
resp, err := http.Post(
"http://www.01happy.com/demo/accept.php"
,
"application/x-www-form-urlencoded"
,
strings.NewReader(
"name=cjb"
))
if
err != nil {
fmt.Println(err)
}
defer
resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if
err != nil {
// handle error
}
fmt.Println(string(body))
}
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Tips：使用這個方法的話，第二個參數要設置成”application/x-www-form-urlencoded”，否則post參數無法傳遞。
一種是使用http.PostForm方法
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func
httpPostForm() {
resp, err := http.PostForm(
"http://www.01happy.com/demo/accept.php"
,
url.Values{
"key"
: {
"Value"
},
"id"
: {
"123"
}})
if
err != nil {
// handle error
}
defer
resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if
err != nil {
// handle error
}
fmt.Println(string(body))
}
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復雜的請求
有時需要在請求的時候設置頭參數、cookie之類的數據，就可以使用http.Do方法。
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func
httpDo() {
client := &http.Client{}
req, err := http.NewRequest(
"POST"
,
"http://www.01happy.com/demo/accept.php"
, strings.NewReader(
"name=cjb"
))
if
err != nil {
// handle error
}
req.Header.Set(
"Content-Type"
,
"application/x-www-form-urlencoded"
)
req.Header.Set(
"Cookie"
,
"name=anny"
)
resp, err := client.Do(req)
defer
resp.Body.Close()
body, err := ioutil.ReadAll(resp.Body)
if
err != nil {
// handle error
}
fmt.Println(string(body))
}
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同上面的post請求，必須要設定Content-Type為application/x-www-form-urlencoded，post參數才可正常傳遞。
如果要發起head請求可以直接使用http client的head方法，比較簡單，這里就不再說明。
用golang進行http請求類型多了，總結備忘一下。
1.普通的post\get請求
var r http.Request
r.ParseForm()
r.Form.Add("uuid", orderUUID)
bodystr := strings.TrimSpace(r.Form.Encode())
request, err := http.NewRequest("GET", url, strings.NewReader(bodystr))
if err != nil {
//TODO:
}
request.Header.Set("Content-Type", "application/x-www-form-urlencoded")
request.Header.Set("Connection", "Keep-Alive")
var resp *http.Response
resp, err = http.DefaultClient.Do(request)
if err != nil {
//TODO:
}
2. body全部二進制數據流進行post
//body提交二進制數據
func DoBytesPost(url string, data []byte) ([]byte, error) {
body := bytes.NewReader(data)
request, err := http.NewRequest(POST_METHOD, url, body)
if err != nil {
log.Println("http.NewRequest,[err=%s][url=%s]", err, url)
return []byte(""), err
}
request.Header.Set("Connection", "Keep-Alive")
var resp *http.Response
resp, err = http.DefaultClient.Do(request)
if err != nil {
log.Println("http.Do failed,[err=%s][url=%s]", err, url)
return []byte(""), err
}
defer resp.Body.Close()
b, err := ioutil.ReadAll(resp.Body)
if err != nil {
log.Println("http.Do failed,[err=%s][url=%s]", err, url)
}
return b, err
}
3. 模擬web表單文件上傳進行post
func newfileUploadRequest(uri string, params map[string]string, paramName, path string) (*http.Request, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
body := &bytes.Buffer{}
writer := multipart.NewWriter(body)
part, err := writer.CreateFormFile(paramName, path)
if err != nil {
return nil, err
}
_, err = io.Copy(part, file)
for key, val := range params {
_ = writer.WriteField(key, val)
}
err = writer.Close()
if err != nil {
return nil, err
}
request, err := http.NewRequest("POST", uri, body)
request.Header.Set("Content-Type", writer.FormDataContentType())
return request, err
}