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								app/user/cmd/api/internal/service/yushanService.go
									
									
									
									
									
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								app/user/cmd/api/internal/service/yushanService.go
									
									
									
									
									
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							| @@ -0,0 +1,186 @@ | ||||
| package service | ||||
|  | ||||
| import ( | ||||
| 	"bytes" | ||||
| 	"crypto/aes" | ||||
| 	"crypto/cipher" | ||||
| 	"crypto/rand" | ||||
| 	"encoding/base64" | ||||
| 	"encoding/hex" | ||||
| 	"encoding/json" | ||||
| 	"fmt" | ||||
| 	"github.com/tidwall/gjson" | ||||
| 	"io" | ||||
| 	"net/http" | ||||
| 	"strings" | ||||
| 	"time" | ||||
| 	"tydata-server/app/user/cmd/api/internal/config" | ||||
| ) | ||||
|  | ||||
| type YushanService struct { | ||||
| 	config config.YushanConfig | ||||
| } | ||||
|  | ||||
| func NewYushanService(c config.Config) *YushanService { | ||||
| 	return &YushanService{ | ||||
| 		config: c.YushanConfig, | ||||
| 	} | ||||
| } | ||||
|  | ||||
| func (y *YushanService) request(prodID string, params map[string]interface{}) ([]byte, error) { | ||||
| 	// 获取当前时间戳 | ||||
| 	unixMilliseconds := time.Now().UnixNano() / int64(time.Millisecond) | ||||
|  | ||||
| 	// 生成请求序列号 | ||||
| 	requestSN, _ := y.GenerateRandomString() | ||||
|  | ||||
| 	// 构建请求数据 | ||||
| 	reqData := map[string]interface{}{ | ||||
| 		"prod_id":    prodID, | ||||
| 		"req_time":   unixMilliseconds, | ||||
| 		"request_sn": requestSN, | ||||
| 		"req_data":   params, | ||||
| 	} | ||||
|  | ||||
| 	// 将请求数据转换为 JSON 字节数组 | ||||
| 	messageBytes, err := json.Marshal(reqData) | ||||
| 	if err != nil { | ||||
| 		return nil, err | ||||
| 	} | ||||
|  | ||||
| 	// 获取 API 密钥 | ||||
| 	key, err := hex.DecodeString(y.config.ApiKey) | ||||
| 	if err != nil { | ||||
| 		return nil, err | ||||
| 	} | ||||
|  | ||||
| 	// 使用 AES CBC 加密请求数据 | ||||
| 	cipherText := y.AES_CBC_Encrypt(messageBytes, key) | ||||
|  | ||||
| 	// 将加密后的数据编码为 Base64 字符串 | ||||
| 	content := base64.StdEncoding.EncodeToString(cipherText) | ||||
|  | ||||
| 	// 发起 HTTP 请求 | ||||
| 	client := &http.Client{} | ||||
| 	req, err := http.NewRequest("POST", y.config.Url, strings.NewReader(content)) | ||||
| 	if err != nil { | ||||
| 		return nil, err | ||||
| 	} | ||||
| 	req.Header.Set("Content-Type", "application/json") | ||||
| 	req.Header.Set("ACCT_ID", y.config.AcctID) | ||||
|  | ||||
| 	// 执行请求 | ||||
| 	resp, err := client.Do(req) | ||||
| 	if err != nil { | ||||
| 		return nil, err | ||||
| 	} | ||||
| 	defer resp.Body.Close() | ||||
|  | ||||
| 	// 读取响应体 | ||||
| 	body, err := io.ReadAll(resp.Body) | ||||
| 	if err != nil { | ||||
| 		return nil, err | ||||
| 	} | ||||
|  | ||||
| 	var respData []byte | ||||
|  | ||||
| 	if IsJSON(string(body)) { | ||||
| 		respData = body | ||||
| 	} else { | ||||
| 		sDec, err := base64.StdEncoding.DecodeString(string(body)) | ||||
| 		if err != nil { | ||||
| 			return nil, err | ||||
| 		} | ||||
| 		respData = y.AES_CBC_Decrypt(sDec, key) | ||||
| 	} | ||||
| 	retCode := gjson.GetBytes(respData, "retcode").String() | ||||
|  | ||||
| 	if retCode == "100000" { | ||||
| 		// retcode 为 100000,表示查询为空 | ||||
| 		return nil, fmt.Errorf("羽山请求查空: %s", string(respData)) | ||||
| 	} else if retCode == "000000" { | ||||
| 		// retcode 为 000000,表示有数据,返回 retdata | ||||
| 		retData := gjson.GetBytes(respData, "retdata") | ||||
| 		if !retData.Exists() { | ||||
| 			return nil, fmt.Errorf("羽山请求retdata为空: %s", string(respData)) | ||||
| 		} | ||||
| 		return []byte(retData.Raw), nil | ||||
| 	} else { | ||||
| 		return nil, fmt.Errorf("羽山请求未知的状态码: %s", string(respData)) | ||||
| 	} | ||||
|  | ||||
| } | ||||
|  | ||||
| // 判断字符串是否为 JSON 格式 | ||||
| func IsJSON(s string) bool { | ||||
| 	var js interface{} | ||||
| 	return json.Unmarshal([]byte(s), &js) == nil | ||||
| } | ||||
|  | ||||
| // GenerateRandomString 生成一个32位的随机字符串订单号 | ||||
| func (y *YushanService) GenerateRandomString() (string, error) { | ||||
| 	// 创建一个16字节的数组 | ||||
| 	bytes := make([]byte, 16) | ||||
| 	// 读取随机字节到数组中 | ||||
| 	if _, err := rand.Read(bytes); err != nil { | ||||
| 		return "", err | ||||
| 	} | ||||
| 	// 将字节数组编码为16进制字符串 | ||||
| 	return hex.EncodeToString(bytes), nil | ||||
| } | ||||
|  | ||||
| // AEC加密(CBC模式) | ||||
| func (y *YushanService) AES_CBC_Encrypt(plainText []byte, key []byte) []byte { | ||||
| 	//指定加密算法,返回一个AES算法的Block接口对象 | ||||
| 	block, err := aes.NewCipher(key) | ||||
| 	if err != nil { | ||||
| 		panic(err) | ||||
| 	} | ||||
| 	//进行填充 | ||||
| 	plainText = Padding(plainText, block.BlockSize()) | ||||
| 	//指定初始向量vi,长度和block的块尺寸一致 | ||||
| 	iv := []byte("0000000000000000") | ||||
| 	//指定分组模式,返回一个BlockMode接口对象 | ||||
| 	blockMode := cipher.NewCBCEncrypter(block, iv) | ||||
| 	//加密连续数据库 | ||||
| 	cipherText := make([]byte, len(plainText)) | ||||
| 	blockMode.CryptBlocks(cipherText, plainText) | ||||
| 	//返回base64密文 | ||||
| 	return cipherText | ||||
| } | ||||
|  | ||||
| // AEC解密(CBC模式) | ||||
| func (y *YushanService) AES_CBC_Decrypt(cipherText []byte, key []byte) []byte { | ||||
| 	//指定解密算法,返回一个AES算法的Block接口对象 | ||||
| 	block, err := aes.NewCipher(key) | ||||
| 	if err != nil { | ||||
| 		panic(err) | ||||
| 	} | ||||
| 	//指定初始化向量IV,和加密的一致 | ||||
| 	iv := []byte("0000000000000000") | ||||
| 	//指定分组模式,返回一个BlockMode接口对象 | ||||
| 	blockMode := cipher.NewCBCDecrypter(block, iv) | ||||
| 	//解密 | ||||
| 	plainText := make([]byte, len(cipherText)) | ||||
| 	blockMode.CryptBlocks(plainText, cipherText) | ||||
| 	//删除填充 | ||||
| 	plainText = UnPadding(plainText) | ||||
| 	return plainText | ||||
| } // 对明文进行填充 | ||||
| func Padding(plainText []byte, blockSize int) []byte { | ||||
| 	//计算要填充的长度 | ||||
| 	n := blockSize - len(plainText)%blockSize | ||||
| 	//对原来的明文填充n个n | ||||
| 	temp := bytes.Repeat([]byte{byte(n)}, n) | ||||
| 	plainText = append(plainText, temp...) | ||||
| 	return plainText | ||||
| } | ||||
|  | ||||
| // 对密文删除填充 | ||||
| func UnPadding(cipherText []byte) []byte { | ||||
| 	//取出密文最后一个字节end | ||||
| 	end := cipherText[len(cipherText)-1] | ||||
| 	//删除填充 | ||||
| 	cipherText = cipherText[:len(cipherText)-int(end)] | ||||
| 	return cipherText | ||||
| } | ||||
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