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request.go
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request.go
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package request
import (
"bytes"
"context"
"encoding/json"
"encoding/xml"
"errors"
"fmt"
"io"
"net/http"
"net/url"
"reflect"
"time"
)
type Request struct {
Headers http.Header // 请求头
RawRequest *http.Request // 请求对象
RowUrl string // 请求地址
URL *url.URL // 请求地址结构体
Method string // 请求方式
Body []byte // 请求请求主体
GetBody GetContentFunc // 获取请求主体方法
Cookies []*http.Cookie // cookie
Timeout time.Duration // 超时时间
Queries map[string]string
// 重试
retryOption *retryOption
client *Client
close bool
// 请求,支持自定义封装
roundTrip RoundTripper
unReplayableBody io.ReadCloser
unMarshalBody interface{} // 没有解析的body, 对象,结构体
beforeRequest []RequestMiddleware
afterResponse []ResponseMiddleware
}
type GetContentFunc func() (io.ReadCloser, error)
func New() *Request {
beforeRequest := []RequestMiddleware{
parseRequestBody,
parseRequestURL,
}
return &Request{
Headers: http.Header{},
Cookies: make([]*http.Cookie, 0),
Queries: make(map[string]string, 0),
retryOption: nil,
client: nil,
close: false,
roundTrip: nil,
unReplayableBody: nil,
unMarshalBody: nil,
beforeRequest: beforeRequest,
afterResponse: make([]ResponseMiddleware, 0),
}
}
func (r *Request) Do(ctx context.Context) (resp *Response, err error) {
if r.Method == "" {
return nil, errors.New("method is empty")
}
if r.RowUrl == "" {
return nil, errors.New("url is empty")
}
r.URL, err = url.Parse(r.RowUrl)
if err != nil {
return
}
if r.client == nil {
r.client = newClient()
}
resp, err = r.do(ctx)
return
}
func (r *Request) do(ctx context.Context) (resp *Response, err error) {
if r.Headers == nil {
r.Headers = make(http.Header)
}
for _, f := range r.beforeRequest {
if err = f(r.client, r); err != nil {
return
}
}
resp, err = r.client.roundTrip(ctx, r)
for _, f := range r.afterResponse {
if err = f(r.client, resp); err != nil {
return
}
}
return
}
func (r *Request) SetMethod(method string) *Request {
r.Method = method
return r
}
func (r *Request) SetRowUrl(rowUrl string) *Request {
r.RowUrl = rowUrl
return r
}
func (r *Request) SetQuery(queries map[string]string) *Request {
r.Queries = queries
return r
}
func (r *Request) Request(method, rowUrl string) *Request {
r.Method = method
r.RowUrl = rowUrl
return r
}
func (r *Request) SetBody(body interface{}) *Request {
if body == nil {
return r
}
switch b := body.(type) {
case io.ReadCloser:
r.unReplayableBody = b
r.GetBody = func() (io.ReadCloser, error) {
return r.unReplayableBody, nil
}
case io.Reader:
r.unReplayableBody = io.NopCloser(b)
r.GetBody = func() (io.ReadCloser, error) {
return r.unReplayableBody, nil
}
case []byte:
r.SetBodyBytes(b)
case string:
r.SetBodyString(b)
case func() (io.ReadCloser, error):
r.GetBody = b
case GetContentFunc:
r.GetBody = b
default:
t := reflect.TypeOf(body)
switch t.Kind() {
case reflect.Ptr, reflect.Struct, reflect.Map, reflect.Slice, reflect.Array:
r.unMarshalBody = body
default:
r.SetBodyString(fmt.Sprint(body))
}
}
return r
}
func (r *Request) handleMarshalBody(body interface{}) error {
ct := ""
if r.Headers != nil {
ct = r.Headers.Get(ContentType)
}
if ct != "" {
if IsXMLType(ct) {
body, err := xml.Marshal(body)
if err != nil {
return err
}
r.SetBodyBytes(body)
} else {
body, err := json.Marshal(body)
if err != nil {
return err
}
r.SetBodyBytes(body)
}
return nil
}
content, err := json.Marshal(body)
if err != nil {
return err
}
r.SetBodyJsonBytes(content)
return nil
}
func (r *Request) SetBodyBytes(body []byte) *Request {
r.Body = body
r.GetBody = func() (io.ReadCloser, error) {
return io.NopCloser(bytes.NewReader(body)), nil
}
return r
}
func (r *Request) SetBodyString(body string) *Request {
return r.SetBodyBytes([]byte(body))
}
func (r *Request) SetBodyJsonBytes(body []byte) *Request {
r.SetContentType(JsonContentType)
return r.SetBodyBytes(body)
}
func (r *Request) SetContentType(contentType string) *Request {
return r.SetHeader(ContentType, contentType)
}
func (r *Request) SetFormData(data map[string]string) *Request {
if len(data) == 0 {
return r
}
formData := url.Values{}
for k, v := range data {
formData.Add(k, v)
}
r.SetContentType(FormContentType)
r.SetBodyBytes([]byte(formData.Encode()))
return r
}
func (r *Request) SetHeaders(headers map[string]string) *Request {
for k, v := range headers {
r.SetHeader(k, v)
}
return r
}
func (r *Request) SetHeader(key, value string) *Request {
if r.Headers == nil {
r.Headers = make(http.Header)
}
r.Headers.Set(key, value)
return r
}
func (r *Request) getHeader(key string) string {
if r.Headers == nil {
return ""
}
return r.Headers.Get(key)
}
func Get(url string) (resp *Response, err error) {
return New().Request(http.MethodGet, url).Do(context.Background())
}
func Post(url string, body interface{}, form map[string]string) (resp *Response, err error) {
req := New()
if body != nil {
req.SetBody(body).SetContentType(JsonContentType)
}
if form != nil {
req.SetFormData(form)
}
return req.Request(http.MethodPost, url).Do(context.Background())
}