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requester.go
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requester.go
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package gorequester
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strings"
"time"
urlplus "github.com/cheetah-fun-gs/goplus/net/url"
)
func defaultClient() *http.Client {
return &http.Client{
Timeout: time.Second * 5,
}
}
// Requester http.Request
type Requester struct {
Error error
client *http.Client
url *url.URL
request *http.Request
method string
contentType string
rawData []byte
formFields url.Values
formFiles []*FormFile
}
// New 创建一个基础 Requester
func New(method, toURL string) *Requester {
u, err := url.Parse(toURL)
if err != nil {
return &Requester{
Error: err,
}
}
return &Requester{
client: defaultClient(),
url: u,
method: method,
rawData: []byte{},
formFields: map[string][]string{},
formFiles: []*FormFile{},
}
}
// NewWithClient 创建一个基础 Requester
func NewWithClient(method, toURL string, client *http.Client) *Requester {
u, err := url.Parse(toURL)
if err != nil {
return &Requester{
Error: err,
}
}
return &Requester{
client: client,
url: u,
method: method,
rawData: []byte{},
formFields: map[string][]string{},
formFiles: []*FormFile{},
}
}
// Client Client
func (req *Requester) Client() *http.Client {
return req.client
}
// URL URL
func (req *Requester) URL() *url.URL {
return req.url
}
// Request Request
func (req *Requester) Request() *http.Request {
return req.request
}
// RawData RawData
func (req *Requester) RawData() []byte {
return req.rawData
}
// FormFields FormFields
func (req *Requester) FormFields() url.Values {
return req.formFields
}
// Get 创建一个 GET Requester
func Get(toURL string, v ...interface{}) *Requester {
return New("GET", toURL).AddRawQuery(v...)
}
// Post 创建一个 POST Requester
func Post(toURL string) *Requester {
return New("POST", toURL)
}
// PostData PostData
func PostData(toURL, contentType string, v interface{}) *Requester {
req := New("POST", toURL).SetRawData(v)
req.contentType = contentType
return req
}
// PostJSON PostJSON
func PostJSON(toURL string, v interface{}) *Requester {
req := New("POST", toURL).SetRawData(v)
req.contentType = "application/json"
return req
}
// PostForm PostForm
func PostForm(toURL string, v interface{}) *Requester {
return New("POST", toURL).SetFormFields(v)
}
// v type in ( string, struct, map[string]string, map[string][]string, map[string]int, map[string][]int )
func stringRawQuery(v ...interface{}) (string, error) {
splits := []string{}
for _, vv := range v {
switch vv.(type) {
case string:
splits = append(splits, vv.(string))
default:
s, err := urlplus.ToRawQuery(vv)
if err != nil {
return "", err
}
splits = append(splits, s)
}
}
return strings.Join(splits, "&"), nil
}
// AddRawQuery 追加 RawQuery
func (req *Requester) AddRawQuery(v ...interface{}) *Requester {
if req.Error != nil {
return req
}
s, err := stringRawQuery(v...)
if err != nil {
req.Error = err
return req
}
if req.url.RawQuery == "" {
req.url.RawQuery = s
} else {
req.url.RawQuery += "&" + s
}
return req
}
// SetRawQuery 重设 RawQuery
func (req *Requester) SetRawQuery(v ...interface{}) *Requester {
if req.Error != nil {
return req
}
s, err := stringRawQuery(v...)
if err != nil {
req.Error = err
return req
}
req.url.RawQuery = s
return req
}
// v type in ( string, []byte, struct, any json )
func byteRawData(v interface{}) ([]byte, error) {
switch v.(type) {
case string:
return []byte(v.(string)), nil
case []byte:
return v.([]byte), nil
default:
d, err := json.Marshal(v)
if err != nil {
return nil, err
}
return d, nil
}
}
// SetRawData 设置 RawData
func (req *Requester) SetRawData(v interface{}) *Requester {
if req.Error != nil {
return req
}
d, err := byteRawData(v)
if err != nil {
req.Error = err
return req
}
req.rawData = d
return req
}
// SetFormFields 设置 formField
// v type in ( string, struct, map[string]string, map[string][]string, map[string]int, map[string][]int )
func (req *Requester) SetFormFields(v interface{}) *Requester {
if req.Error != nil {
return req
}
m, err := urlplus.ToValues(v)
if err != nil {
req.Error = err
return req
}
req.formFields = m
return req
}
// AddFormField 追加 formField
func (req *Requester) AddFormField(key string, val interface{}) *Requester {
if req.Error != nil {
return req
}
v, ok := req.formFields[key]
if !ok {
req.formFields[key] = []string{fmt.Sprintf("%v", val)}
} else {
v = append(v, fmt.Sprintf("%v", val))
}
return req
}
// SetFormField 设置 formField
func (req *Requester) SetFormField(key string, val interface{}) *Requester {
if req.Error != nil {
return req
}
req.formFields[key] = []string{fmt.Sprintf("%v", val)}
return req
}
// AddFormFile 追加 formFile
func (req *Requester) AddFormFile(files ...*FormFile) *Requester {
if req.Error != nil {
return req
}
req.formFiles = append(req.formFiles, files...)
return req
}
func (req *Requester) httpRequest() *Requester {
if req.Error != nil {
return req
}
if req.request != nil {
return req
}
if req.method != "POST" && (len(req.rawData) != 0 || len(req.formFields) != 0 || len(req.formFiles) != 0) {
req.Error = fmt.Errorf("have rawData, formField, formFile, use POST")
return req
}
if len(req.rawData) != 0 && (len(req.formFields) != 0 || len(req.formFiles) != 0) {
req.Error = fmt.Errorf("raw, form only choose one")
return req
}
var body io.Reader
if len(req.rawData) != 0 {
body = strings.NewReader(string(req.rawData))
} else {
var contentType string
var err error
contentType, body, err = buildFormData(req.formFields, req.formFiles)
if err != nil {
req.Error = err
return req
}
req.contentType = contentType
}
httpReq, err := http.NewRequest(req.method, req.url.String(), body)
if err != nil {
req.Error = err
return req
}
if req.contentType != "" {
httpReq.Header.Set("Content-Type", req.contentType)
}
req.request = httpReq
return req
}
// SetHeader 设置请求头
func (req *Requester) SetHeader(key, val string) *Requester {
req.httpRequest()
if req.Error != nil {
return req
}
req.request.Header.Set(key, val)
return req
}
// AddHeader 添加请求头
func (req *Requester) AddHeader(key, val string) *Requester {
req.httpRequest()
if req.Error != nil {
return req
}
req.request.Header.Add(key, val)
return req
}
// Do 获取响应
func (req *Requester) Do() (*http.Response, error) {
req.httpRequest()
if req.Error != nil {
return nil, req.Error
}
return req.client.Do(req.request)
}
// ReadData 获取响应二进制响应
func (req *Requester) ReadData() ([]byte, error) {
resp, err := req.Do()
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
return nil, fmt.Errorf("%s", resp.Status)
}
return ioutil.ReadAll(resp.Body)
}
// ReadString 获取响应字符串响应
func (req *Requester) ReadString() (string, error) {
data, err := req.ReadData()
if err != nil {
return "", err
}
return string(data), nil
}
// ReadJSON 获取响应JSON响应
func (req *Requester) ReadJSON(v interface{}) error {
data, err := req.ReadData()
if err != nil {
return err
}
return json.Unmarshal(data, v)
}