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net_internal.go
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net_internal.go
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package netutil
import (
"bytes"
"errors"
"fmt"
"io"
"io/ioutil"
"net/http"
"net/url"
"strings"
)
func doHttpRequest(method, reqUrl string, params ...any) (*http.Response, error) {
if len(reqUrl) == 0 {
return nil, errors.New("url should be specified")
}
req := &http.Request{
Method: method,
Header: make(http.Header),
Proto: "HTTP/1.1",
ProtoMajor: 1,
ProtoMinor: 1,
}
client := &http.Client{}
err := setUrl(req, reqUrl)
if err != nil {
return nil, err
}
switch len(params) {
case 1:
err = setHeader(req, params[0])
if err != nil {
return nil, err
}
case 2:
err := setHeaderAndQueryParam(req, reqUrl, params[0], params[1])
if err != nil {
return nil, err
}
case 3:
err := setHeaderAndQueryAndBody(req, reqUrl, params[0], params[1], params[2])
if err != nil {
return nil, err
}
case 4:
err := setHeaderAndQueryAndBody(req, reqUrl, params[0], params[1], params[2])
if err != nil {
return nil, err
}
client, err = getClient(params[3])
if err != nil {
return nil, err
}
}
resp, e := client.Do(req)
return resp, e
}
func setHeaderAndQueryParam(req *http.Request, reqUrl string, header, queryParam any) error {
err := setHeader(req, header)
if err != nil {
return err
}
err = setQueryParam(req, reqUrl, queryParam)
if err != nil {
return err
}
return nil
}
func setHeaderAndQueryAndBody(req *http.Request, reqUrl string, header, queryParam, body any) error {
if err := setHeader(req, header); err != nil {
return err
} else if err = setQueryParam(req, reqUrl, queryParam); err != nil {
return err
} else if err = setBodyByte(req, body); err != nil {
return err
}
return nil
}
func setHeader(req *http.Request, header any) error {
if header == nil {
return nil
}
switch v := header.(type) {
case map[string]string:
for k := range v {
req.Header.Add(k, v[k])
}
case http.Header:
for k, vv := range v {
for _, vvv := range vv {
req.Header.Add(k, vvv)
}
}
default:
return errors.New("header params type should be http.Header or map[string]string")
}
if host := req.Header.Get("Host"); host != "" {
req.Host = host
}
return nil
}
func setUrl(req *http.Request, reqUrl string) error {
u, err := url.Parse(reqUrl)
if err != nil {
return err
}
req.URL = u
return nil
}
func setQueryParam(req *http.Request, reqUrl string, queryParam any) error {
if queryParam == nil {
return nil
}
var values url.Values
switch v := queryParam.(type) {
case map[string]string:
values = url.Values{}
for k := range v {
values.Set(k, v[k])
}
case url.Values:
values = v
default:
return errors.New("query string params type should be url.Values or map[string]string")
}
// set url
if values != nil {
if !strings.Contains(reqUrl, "?") {
reqUrl = reqUrl + "?" + values.Encode()
} else {
reqUrl = reqUrl + "&" + values.Encode()
}
}
u, err := url.Parse(reqUrl)
if err != nil {
return err
}
req.URL = u
return nil
}
func setBodyByte(req *http.Request, body any) error {
if body == nil {
return nil
}
var bodyReader *bytes.Reader
switch b := body.(type) {
case io.Reader:
buf := bytes.NewBuffer(nil)
if _, err := io.Copy(buf, b); err != nil {
return err
}
req.Body = ioutil.NopCloser(buf)
req.ContentLength = int64(buf.Len())
case []byte:
bodyReader = bytes.NewReader(b)
req.Body = ioutil.NopCloser(bodyReader)
req.ContentLength = int64(bodyReader.Len())
case map[string]interface{}:
values := url.Values{}
for k := range b {
values.Set(k, fmt.Sprintf("%v", b[k]))
}
bodyReader = bytes.NewReader([]byte(values.Encode()))
req.Body = ioutil.NopCloser(bodyReader)
req.ContentLength = int64(bodyReader.Len())
case url.Values:
bodyReader = bytes.NewReader([]byte(b.Encode()))
req.Body = ioutil.NopCloser(bodyReader)
req.ContentLength = int64(bodyReader.Len())
default:
return fmt.Errorf("invalid body type: %T", b)
}
return nil
}
func getClient(client any) (*http.Client, error) {
c := http.Client{}
if client != nil {
switch v := client.(type) {
case http.Client:
c = v
default:
return nil, errors.New("client type should be http.Client")
}
}
return &c, nil
}