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main.go
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main.go
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package main
import (
"context"
"encoding/base64"
"fmt"
"github.com/tencentyun/scf-go-lib/cloudfunction"
"github.com/yyz/C2Proxy/events"
"io/ioutil"
"log"
"net/http"
"strings"
)
// Run 是核心处理函数
func Run(ctx context.Context, event events.APIGatewayRequest) (resp events.APIGatewayResponse, err error) {
// 初始化返回API结构体
resp = events.APIGatewayResponse{
IsBase64Encoded: true,
Headers: map[string]string{},
StatusCode: 502,
Body: "error",
}
// 下面这几行是处理QueryString
qrString := ""
lenQRString := len(event.QueryString)
if lenQRString != 0 {
qrString = "?"
for i := range event.QueryString {
qrString += i + "=" + event.QueryString[i][0] + "&"
}
if string(qrString[len(qrString)-1]) == "&" {
qrString = qrString[:len(qrString)-1]
}
}
reqsUrl := "http://test.cn:80" + event.Path + qrString
fmt.Println("===========================")
fmt.Println(event.Method)
fmt.Println(event.Body)
request, err := http.NewRequest(event.Method, reqsUrl, strings.NewReader(event.Body))
if err != nil {
log.Println(err)
}
for key, value := range event.Headers {
if key == "host" {
continue
}
request.Header[key] = []string{value}
}
request.Header["User-Agent"] = []string{event.Headers["user-agent"]}
request.Header["X-Forwarded-For"] = []string{event.Context.SourceIP}
fmt.Println("===========================")
fmt.Println(request.Header)
fmt.Println("===========================")
client := &http.Client{}
HttpResp, err := client.Do(request)
if err != nil {
log.Println(err)
}
// 下面是得到了http response 然后把他封装成API特定的返回的过程
// 需要封装resp.Headers、resp.StatusCode、resp.Body、resp.IsBase64Encoded
heads := HttpResp.Header
for i := range heads {
//fmt.Println(heads[i])
resp.Headers[i] = heads[i][0]
}
resp.StatusCode = HttpResp.StatusCode
content, err := ioutil.ReadAll(HttpResp.Body)
if err != nil {
resp.Body = err.Error()
return
}
resp.Body = base64Encode(content)
return
}
func base64Encode(raw []byte) (b64 string) {
b64 = base64.StdEncoding.EncodeToString(raw)
return
}
func main() {
// 云函数的调用起点
cloudfunction.Start(Run)
}