実践的な経験の共有: Go 言語と Tencent Cloud インターフェースを接続するための実践的なヒント

package main

import (
    "crypto/hmac"
    "crypto/sha256"
    "encoding/base64"
    "fmt"
    "io/ioutil"
    "net/http"
    "net/url"
    "strings"
    "time"
)

const (
    SecretID  = "<your-secret-id>"
    SecretKey = "<your-secret-key>"
)

func main() {
    host := "cvm.tencentcloudapi.com"
    endpoint := fmt.Sprintf("https://%s/?Action=DescribeInstances&Version=2017-03-12", host)
    method := "GET"
    params := map[string]string{
        "Region": "ap-guangzhou",
    }

    // 生成签名
    timestamp := time.Now().Unix()
    signature := generateSignature(host, method, params, timestamp)

    // 构建请求URL
    reqURL := fmt.Sprintf("%s&SecretId=%s&Timestamp=%d&Signature=%s", endpoint, SecretID, timestamp, signature)

    // 发送HTTP请求
    resp, err := http.Get(reqURL)
    if err != nil {
        fmt.Println("请求失败：", err)
        return
    }
    defer resp.Body.Close()

    // 解析响应
    body, _ := ioutil.ReadAll(resp.Body)
    fmt.Println("响应：", string(body))
}

func generateSignature(host, method string, params map[string]string, timestamp int64) string {
    var keys []string
    for k := range params {
        keys = append(keys, k)
    }
    sort.Strings(keys)

    var query string
    for _, k := range keys {
        v := url.QueryEscape(params[k])
        query += k + "=" + v + "&"
    }
    query = strings.TrimRight(query, "&")

    strToSign := method + host + "/?" + query + "&Timestamp=" + strconv.Itoa(int(timestamp))
    mac := hmac.New(sha256.New, []byte(SecretKey))
    mac.Write([]byte(strToSign))
    signature := base64.StdEncoding.EncodeToString(mac.Sum(nil))

    return signature
}