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feat: support CUCloud #9

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Jan 14, 2025
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20 changes: 20 additions & 0 deletions service/cucloud/README.md
Original file line number Diff line number Diff line change
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# CuCloud

[Cu Cloud](https://www.cucloud.cn) is the cloud service brand of China Unicom
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## Usage

1. Create a pair of accessKey and accessKeySecret in `https://console.cucloud.cn/console/uiam/user/${your_id}/info`
2. Create a topic

```go
// define accessKey and accessKeySecret
accessKey := ""
secretKey := ""

// create client
cuCloudClient := New(accessKey, secretKey, "topic_name", "message title", "cloud region code", "account id", "notify type")

// send message
err := cuCloudClient.Send(context.Background(), "", "content")
```
139 changes: 139 additions & 0 deletions service/cucloud/cucloud.go
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package cucloud
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import (
"bytes"
"context"
"crypto/hmac"
"crypto/sha256"
"encoding/hex"
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"sort"
"strconv"
"time"

"golang.org/x/exp/maps"
)

type CuCloud struct {
AccessKey string
SecretKey string
TopicName string
MessageTitle string
CloudRegionCode string
AccountId string
NotifyType string
Client http.Client
}

type CuCloudResp struct {
Code int `json:"code"`
Message string `json:"message"`
Result string `json:"result"`
}

func New(accessKey, secretKey, topicName, messageTitle, cloudRegionCode, accountId, notifyType string) *CuCloud {
return &CuCloud{
accessKey,
secretKey,
topicName,
messageTitle,
cloudRegionCode,
accountId,
notifyType,
http.Client{},
}
}

func (c *CuCloud) Send(ctx context.Context, subject, content string) error {
timeNow := time.Now().UnixMilli()

reqHeader := map[string]string{}
reqHeader["algorithm"] = "HmacSHA256"
reqHeader["requestTime"] = strconv.FormatInt(timeNow, 10)
reqHeader["accessKey"] = c.AccessKey

reqBody := map[string]string{}

reqBody["notifyType"] = c.NotifyType
reqBody["messageTitle"] = url.QueryEscape(c.MessageTitle)
reqBody["messageType"] = "text"
reqBody["messageContent"] = url.QueryEscape(content)
reqBody["topicName"] = url.QueryEscape(c.TopicName)
reqBody["messageTag"] = ""
reqBody["templateName"] = ""
reqBody["cloudRegionCode"] = "cn-langfang-2"

signVal := c.generateRequestSign(reqHeader, reqBody)
reqHeader["sign"] = signVal
reqHeader["Content-Type"] = "application/json"
reqHeader["Account-Id"] = c.AccountId
reqHeader["User-Id"] = c.AccountId
reqHeader["Region-Code"] = c.CloudRegionCode

bodyJson, _ := json.Marshal(reqBody)
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req, err := http.NewRequest("POST", "https://gateway.cucloud.cn/smn/SMNService/api/message/notify", bytes.NewReader(bodyJson))
if err != nil {
return err
}

for k, v := range reqHeader {
req.Header.Set(k, v)
}

client := &http.Client{}

resp, err := client.Do(req)
if err != nil {
return err
}
defer resp.Body.Close()

respBodyRaw, err := io.ReadAll(resp.Body)
if err != nil {
return err
}

var respBody CuCloudResp

err = json.Unmarshal(respBodyRaw, &respBody)
if err != nil {
return err
}

if respBody.Code != 200 {
return fmt.Errorf(respBody.Message)
}

return nil
}

func (c *CuCloud) generateRequestSign(header map[string]string, body map[string]string) string {
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mac := hmac.New(sha256.New, []byte(c.SecretKey))
reqSignMap := make(map[string]string)
maps.Copy(reqSignMap, header)
maps.Copy(reqSignMap, body)
signRawString := ""

var keys []string
for k, _ := range reqSignMap {
keys = append(keys, k)
}

sort.Strings(keys)

for _, k := range keys {
vJson, err := json.Marshal(reqSignMap[k])
if err != nil {
panic(err)
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}
signRawString += k + "=" + string(vJson) + "&"
}

signRawString = signRawString[:len(signRawString)-1]
mac.Write([]byte(signRawString))
return hex.EncodeToString(mac.Sum(nil))
}
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