gosdk/wechat/util/http.go

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package util
import (
"bytes"
"crypto/tls"
"encoding/json"
"encoding/pem"
"encoding/xml"
"fmt"
"io"
"io/ioutil"
"log"
"mime/multipart"
"net/http"
"os"
"golang.org/x/crypto/pkcs12"
)
// HTTPGet get 请求
func HTTPGet(uri string) ([]byte, error) {
response, err := http.Get(uri)
if err != nil {
return nil, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return nil, fmt.Errorf("http get error : uri=%v , statusCode=%v", uri, response.StatusCode)
}
return ioutil.ReadAll(response.Body)
}
// HTTPPost post 请求
func HTTPPost(uri string, data string) ([]byte, error) {
body := bytes.NewBuffer([]byte(data))
response, err := http.Post(uri, "", body)
if err != nil {
return nil, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return nil, fmt.Errorf("http get error : uri=%v , statusCode=%v", uri, response.StatusCode)
}
return ioutil.ReadAll(response.Body)
}
// PostJSON post json 数据请求
func PostJSON(uri string, obj interface{}) ([]byte, error) {
jsonData, err := json.Marshal(obj)
if err != nil {
return nil, err
}
jsonData = bytes.Replace(jsonData, []byte("\\u003c"), []byte("<"), -1)
jsonData = bytes.Replace(jsonData, []byte("\\u003e"), []byte(">"), -1)
jsonData = bytes.Replace(jsonData, []byte("\\u0026"), []byte("&"), -1)
body := bytes.NewBuffer(jsonData)
response, err := http.Post(uri, "application/json;charset=utf-8", body)
if err != nil {
return nil, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return nil, fmt.Errorf("http get error : uri=%v , statusCode=%v", uri, response.StatusCode)
}
return ioutil.ReadAll(response.Body)
}
// PostJSONWithRespContentType post json数据请求且返回数据类型
func PostJSONWithRespContentType(uri string, obj interface{}) ([]byte, string, error) {
jsonData, err := json.Marshal(obj)
if err != nil {
return nil, "", err
}
jsonData = bytes.Replace(jsonData, []byte("\\u003c"), []byte("<"), -1)
jsonData = bytes.Replace(jsonData, []byte("\\u003e"), []byte(">"), -1)
jsonData = bytes.Replace(jsonData, []byte("\\u0026"), []byte("&"), -1)
body := bytes.NewBuffer(jsonData)
response, err := http.Post(uri, "application/json;charset=utf-8", body)
if err != nil {
return nil, "", err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return nil, "", fmt.Errorf("http get error : uri=%v , statusCode=%v", uri, response.StatusCode)
}
responseData, err := ioutil.ReadAll(response.Body)
contentType := response.Header.Get("Content-Type")
return responseData, contentType, err
}
// PostFile 上传文件
func PostFile(fieldname, filename, uri string) ([]byte, error) {
fields := []MultipartFormField{
{
IsFile: true,
Fieldname: fieldname,
Filename: filename,
},
}
return PostMultipartForm(fields, uri)
}
// MultipartFormField 保存文件或其他字段信息
type MultipartFormField struct {
IsFile bool
Fieldname string
Value []byte
Filename string
}
// PostMultipartForm 上传文件或其他多个字段
func PostMultipartForm(fields []MultipartFormField, uri string) (respBody []byte, err error) {
bodyBuf := &bytes.Buffer{}
bodyWriter := multipart.NewWriter(bodyBuf)
for _, field := range fields {
if field.IsFile {
fileWriter, e := bodyWriter.CreateFormFile(field.Fieldname, field.Filename)
if e != nil {
err = fmt.Errorf("error writing to buffer , err=%v", e)
return
}
fh, e := os.Open(field.Filename)
if e != nil {
err = fmt.Errorf("error opening file , err=%v", e)
return
}
defer fh.Close()
if _, err = io.Copy(fileWriter, fh); err != nil {
return
}
} else {
partWriter, e := bodyWriter.CreateFormField(field.Fieldname)
if e != nil {
err = e
return
}
valueReader := bytes.NewReader(field.Value)
if _, err = io.Copy(partWriter, valueReader); err != nil {
return
}
}
}
contentType := bodyWriter.FormDataContentType()
bodyWriter.Close()
resp, e := http.Post(uri, contentType, bodyBuf)
if e != nil {
err = e
return
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, err
}
respBody, err = ioutil.ReadAll(resp.Body)
return
}
// PostXML perform a HTTP/POST request with XML body
func PostXML(uri string, obj interface{}) ([]byte, error) {
xmlData, err := xml.Marshal(obj)
if err != nil {
return nil, err
}
body := bytes.NewBuffer(xmlData)
response, err := http.Post(uri, "application/xml;charset=utf-8", body)
if err != nil {
return nil, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return nil, fmt.Errorf("http code error : uri=%v , statusCode=%v", uri, response.StatusCode)
}
return ioutil.ReadAll(response.Body)
}
// httpWithTLS CA证书
func httpWithTLS(rootCa, key string) (*http.Client, error) {
var client *http.Client
certData, err := ioutil.ReadFile(rootCa)
if err != nil {
return nil, fmt.Errorf("unable to find cert path=%s, error=%v", rootCa, err)
}
cert := pkcs12ToPem(certData, key)
config := &tls.Config{
Certificates: []tls.Certificate{cert},
}
tr := &http.Transport{
TLSClientConfig: config,
DisableCompression: true,
}
client = &http.Client{Transport: tr}
return client, nil
}
// pkcs12ToPem 将Pkcs12转成Pem
func pkcs12ToPem(p12 []byte, password string) tls.Certificate {
blocks, err := pkcs12.ToPEM(p12, password)
defer func() {
if x := recover(); x != nil {
log.Print(x)
}
}()
if err != nil {
panic(err)
}
var pemData []byte
for _, b := range blocks {
pemData = append(pemData, pem.EncodeToMemory(b)...)
}
cert, err := tls.X509KeyPair(pemData, pemData)
if err != nil {
panic(err)
}
return cert
}
// PostXMLWithTLS perform a HTTP/POST request with XML body and TLS
func PostXMLWithTLS(uri string, obj interface{}, ca, key string) ([]byte, error) {
xmlData, err := xml.Marshal(obj)
if err != nil {
return nil, err
}
body := bytes.NewBuffer(xmlData)
client, err := httpWithTLS(ca, key)
if err != nil {
return nil, err
}
response, err := client.Post(uri, "application/xml;charset=utf-8", body)
if err != nil {
return nil, err
}
defer response.Body.Close()
if response.StatusCode != http.StatusOK {
return nil, fmt.Errorf("http code error : uri=%v , statusCode=%v", uri, response.StatusCode)
}
return ioutil.ReadAll(response.Body)
}