package demo;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.time.Instant;
import java.time.temporal.ChronoField;
import java.util.Arrays;
import java.util.Base64;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.stream.Collectors;

import javax.crypto.Mac;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;

public class Demo {

    private static String percentEncode(String value) {
        try {
            return value != null ? URLEncoder.encode(value, "UTF-8")
                    .replace("+", "%20")
                    .replace("*", "%2A")
                    .replace("%7E", "~") : null;
        } catch (UnsupportedEncodingException ignore) {
            return value;
        }
    }

    private static String urlDecode(String value) {
        try {
            return URLDecoder.decode(value, "UTF-8");
        } catch (UnsupportedEncodingException ignore) {
            return value;
        }
    }

    private static String readFromInputStream(InputStream source) {
        try (BufferedReader reader = new BufferedReader(new InputStreamReader(source))) {
            return reader.lines().collect(Collectors.joining("\n"));
        } catch (IOException ignore) {
            return "";
        }
    }

    private static String doPost(String url, String fileName) {
        HttpURLConnection urlConnection = null;
        try {
            URL postUrl = new URL(url);
            urlConnection = (HttpURLConnection) postUrl.openConnection();
            urlConnection.setDoOutput(true);
            urlConnection.setDoInput(true);
            urlConnection.setRequestMethod("POST");
            urlConnection.setUseCaches(false);
            urlConnection.setRequestProperty("Content-Type", "application/octet-stream");
            Path filePath = Paths.get(fileName);
            if (!filePath.toFile().isFile()) {
                throw new FileNotFoundException(String.format("file:%s not found", fileName));
            }
            Files.copy(filePath, urlConnection.getOutputStream());
            return readFromInputStream(urlConnection.getInputStream());
        } catch (FileNotFoundException e) {
            return e.getMessage();
        } catch (IOException e) {
            if (urlConnection != null) {
                return readFromInputStream(urlConnection.getErrorStream());
            }
            return e.getMessage();
        }
    }

    private static String doGet(String url) {
        HttpURLConnection urlConnection = null;
        try {
            URL postUrl = new URL(url);
            urlConnection = (HttpURLConnection) postUrl.openConnection();
            urlConnection.setDoOutput(true);
            urlConnection.setDoInput(true);
            urlConnection.setRequestMethod("GET");
            urlConnection.setUseCaches(false);
            return readFromInputStream(urlConnection.getInputStream());
        } catch (IOException e) {
            if (urlConnection != null) {
                return readFromInputStream(urlConnection.getErrorStream());
            }
            return e.getMessage();
        }

    }

    public static String getSignature(String url, String secret, String httpMethod) throws Exception {
        // 解析url中的參數(shù)部分
        URL u = new URL(url);
        String query = u.getQuery();
        // 獲取范化的請(qǐng)求字符串
        String canonicalString = Arrays.stream(query.split("&"))
                .map(s -> s.split("="))
                // 去掉不合法的空參數(shù)（例如: https://example?Url=&AccessKeyId=）
                .filter(arr -> arr != null && arr.length > 1)
                // 根據(jù)請(qǐng)求參數(shù)的字典順序排序
                .sorted(Comparator.comparing(arr -> arr[0]))
                // 按照 RFC3986 規(guī)則編碼參數(shù)名稱、參數(shù)值
                .map(arr -> String.format("%s=%s", percentEncode(arr[0]), percentEncode(urlDecode(arr[1]))))
                // 用"&"拼接起來編碼后的參數(shù)
                .reduce((s1, s2) -> s1 + "&" + s2)
                .orElse("");
        // 將規(guī)范化字符串拼接成待簽名的字符串
        String stringToSign = httpMethod + "&" + percentEncode("/") + "&" + percentEncode(canonicalString);
        // 把 AccessKeySecret加上"&"構(gòu)成 HMAC-SHA1 算法的key
        secret += "&";
        // HMAC-SHA1 編碼后的bytes
        SecretKey secretKey = new SecretKeySpec(secret.getBytes(StandardCharsets.UTF_8), "HmacSHA1");
        Mac mac = Mac.getInstance("HmacSHA1");
        mac.init(secretKey);
        byte[] hashBytes = mac.doFinal(stringToSign.getBytes(StandardCharsets.UTF_8));
        // 按照 base64 編碼規(guī)則生成最后的簽名字符串
        String signature = Base64.getEncoder().encodeToString(hashBytes);
        return signature;
    }

    /**
     * 獲取公共請(qǐng)求參數(shù)。公共請(qǐng)求參數(shù)詳見文檔：http://bestwisewords.com/document_detail/145074.html
     *
     * @param accessKeyId 您的AccessKeyId。如何獲取AccessKeyId請(qǐng)參考：http://bestwisewords.com/document_detail/116401.htm?spm=a2c4g.11186623.0.0.6e6027b5fXEVz0
     * @return 公共請(qǐng)求參數(shù)組成的字典
     */
    private static Map<String, String> getCommonParameters(String accessKeyId) {
        return new HashMap<String, String>() {
            {
                put("Action", "RecognizeGeneral"); // 調(diào)用的接口名稱，此處以 RecognizeGeneral 為例
                put("Version", "2021-07-07"); // API版本。OCR的固定值：2021-07-07
                put("Format", "JSON"); // 指定接口返回?cái)?shù)據(jù)的格式，可以選擇 JSON 或者 XML
                put("AccessKeyId", accessKeyId); // 您的AccessKeyId
                put("SignatureNonce", UUID.randomUUID().toString()); // 簽名唯一隨機(jī)數(shù)，每次調(diào)用不可重復(fù)
                put("Timestamp", Instant.now().with(ChronoField.NANO_OF_SECOND, 0).toString()); // 需要Java8及以上版本。如果您需要使用更低版本Java，請(qǐng)更換獲取時(shí)間戳的方法
                put("SignatureMethod", "HMAC-SHA1"); // 簽名方式。目前為固定值 HMAC-SHA1
                put("SignatureVersion", "1.0"); // 簽名方式。目前為固定值 1.0
            }
        };
    }

    /**
     * 使用傳圖片URL方法請(qǐng)求接口示例。以 RecognizeGeneral 接口為例。
     */
    private static void getDemo() throws Exception {
        String endpoint = "ocr-api.cn-hangzhou.aliyuncs.com";
        // 如何獲取AccessKeyId、AccessKeySecret請(qǐng)參考文檔：http://bestwisewords.com/document_detail/116401.htm?spm=a2c4g.11186623.0.0.6e6027b5GvMJ25
        String accessKeyId = "";
        String accessKeySecret = "";
        // 獲取公共請(qǐng)求參數(shù)
        Map<String, String> parametersMap = getCommonParameters(accessKeyId);
        // 添加業(yè)務(wù)參數(shù)（不同的接口參數(shù)有差異，此處以RecognizeGeneral為例，Url參數(shù)為圖片鏈接）
        parametersMap.put("Url", "https://example.png");
        // 初始化請(qǐng)求URL
        StringBuilder urlBuilder = new StringBuilder("https://" + endpoint + "/?");
        // 把業(yè)務(wù)參數(shù)拼接到請(qǐng)求鏈接中
        for (Map.Entry<String, String> entry : parametersMap.entrySet()) {
            // entry.getValue() 可能出現(xiàn)"&"等符號(hào)。 需要encode
            urlBuilder.append(String.format("%s=%s", entry.getKey(), URLEncoder.encode(entry.getValue(), "UTF-8")))
                    .append('&');
        }
        // 去掉最后的"&"
        String url = urlBuilder.substring(0, urlBuilder.length() - 1);
        // 獲取簽名
        String signature = getSignature(url, accessKeySecret, "GET");
        // 按照 RFC3986 規(guī)則編碼簽名，并添加到最終的請(qǐng)求鏈接上
        url += String.format("&Signature=%s", percentEncode(signature));
        // 通過GET方式請(qǐng)求接口并打印識(shí)別結(jié)果，以 RecognizeGeneral 為例
        String result = doGet(url);
        System.out.println(result);
    }

    /**
     * 識(shí)別本地文件代碼示例。以 RecognizeGeneral 接口為例。
     */
    private static void postDemo() throws Exception {
        String endpoint = "ocr-api.cn-hangzhou.aliyuncs.com";
        // 如何獲取AccessKeyId、AccessKeySecret請(qǐng)參考文檔：http://bestwisewords.com/document_detail/116401.htm?spm=a2c4g.11186623.0.0.6e6027b5GvMJ25
        String accessKeyId = "";
        String accessKeySecret = "";
        // 獲取公共請(qǐng)求參數(shù)
        Map<String, String> parametersMap = getCommonParameters(accessKeyId);
        // 初始化請(qǐng)求URL
        StringBuilder urlBuilder = new StringBuilder("https://" + endpoint + "/?");
        // 把業(yè)務(wù)參數(shù)拼接到請(qǐng)求鏈接中
        for (Map.Entry<String, String> entry : parametersMap.entrySet()) {
            // entry.getValue() 可能出現(xiàn)"&"等符號(hào)。 需要encode
            urlBuilder.append(String.format("%s=%s", entry.getKey(), URLEncoder.encode(entry.getValue(), "UTF-8")))
                    .append('&');
        }
        // 去掉最后的"&"
        String url = urlBuilder.substring(0, urlBuilder.length() - 1);
        // 獲取簽名
        String signature = getSignature(url, accessKeySecret, "POST");
        // 按照 RFC3986 規(guī)則編碼簽名，并添加到最終的請(qǐng)求鏈接上
        url += String.format("&Signature=%s", percentEncode(signature));
        // 本地文件
        String fileName = "/home/example.png";
        // 通過POST請(qǐng)求接口并打印識(shí)別結(jié)果，以 RecognizeGeneral 為例
        String result = doPost(url, fileName);
        System.out.println(result);
    }

    public static void main(String[] args) throws Exception {
        // getDemo();
        // postDemo();
    }
}

# encoding=utf-8
try:
    from urllib.parse import quote, urlparse, parse_qs
except:
    from urllib import quote
    from urlparse import urlparse, parse_qs
import hmac
import base64
import hashlib
import uuid
from datetime import datetime, tzinfo, timedelta


class UTC(tzinfo):
    """表示UTC時(shí)間
    """

    def tzname(self, dt):
        return "UTC"

    def utcoffset(self, dt):
        return timedelta(0)

    def dst(self, dt):
        return timedelta(0)


def percentEncode(s):
    return quote(s.encode('utf-8'), safe='~')


def get_signature(url, secret, http_method):
    # 解析url中的參數(shù)部分
    queries = parse_qs(urlparse(url).query)
    # 按照請(qǐng)求參數(shù)字典順序排序
    keys = sorted(queries.keys())
    # 初始化規(guī)范化的請(qǐng)求字符串
    canonicalized_query_string = ""
    # 生成 規(guī)范化的請(qǐng)求字符串
    for k in keys:
        # 按照 RFC3986 規(guī)則編碼參數(shù)名稱
        quoted_param = percentEncode(k)
        # 按照 RFC3986 規(guī)則編碼參數(shù)值
        quoted_value = percentEncode(queries[k][0])
        # 把編碼后的參數(shù)名稱和值用英文等號(hào)（=）拼接起來，然后用 "&" 連接
        canonicalized_query_string += '&%s=%s' % (quoted_param, quoted_value)
    # 去掉開頭的 "&"
    canonicalized_query_string = canonicalized_query_string[1:]
    # 將規(guī)范化字符串拼接成待簽名的字符串
    string_to_sign = http_method + '&' + percentEncode('/') + '&' + percentEncode(canonicalized_query_string)
    # 把 AccessKeySecret加上"&"構(gòu)成 HMAC-SHA1 算法的key
    secret += '&'
    # HMAC-SHA1 編碼后的bytes
    hash_bytes = hmac.new(secret.encode('utf-8'), string_to_sign.encode('utf-8'), digestmod=hashlib.sha1).digest()
    # 按照 base64 編碼規(guī)則生成最后的簽名字符串
    signature = base64.b64encode(hash_bytes).decode('utf-8')
    return signature


def get_common_parameters(access_key_id):
    """獲取公共請(qǐng)求參數(shù)。公共請(qǐng)求參數(shù)詳見文檔：http://bestwisewords.com/document_detail/145074.html
    Args:
        您的AccessKeyId。如何獲取AccessKeyId請(qǐng)參考：http://bestwisewords.com/document_detail/116401.htm?spm=a2c4g.11186623.0.0.6e6027b5fXEVz0
    Returns:
        公共請(qǐng)求參數(shù)組成的字典
    """
    return {
        "Action": "RecognizeGeneral",    # 調(diào)用的接口名稱，此處以 RecognizeGeneral 為例
        "Version": "2021-07-07",    # API版本。OCR的固定值：2021-07-07
        "Format": "JSON",    # 指定接口返回?cái)?shù)據(jù)的格式，可以選擇 JSON 或者 XML
        "AccessKeyId": access_key_id,    # 您的AccessKeyId
        "SignatureNonce": uuid.uuid4(),    # 簽名唯一隨機(jī)數(shù)
        "Timestamp": datetime.utcnow().replace(tzinfo=UTC()).strftime('%Y-%m-%dT%H:%M:%SZ'),    # 請(qǐng)求的時(shí)間戳。按照ISO8601標(biāo)準(zhǔn)表示，并需要使用UTC時(shí)間，格式為yyyy-MM-ddTHH:mm:ssZ
        "SignatureMethod": "HMAC-SHA1",    # 簽名方式。目前為固定值 HMAC-SHA1
        "SignatureVersion": "1.0"    # 簽名方式。目前為固定值 1.0
    }


def get_request_url():
    """獲取完整的請(qǐng)求URL。
    """
    endpoint = "ocr-api.cn-hangzhou.aliyuncs.com"
    # 如何獲取AccessKeyId、AccessKeySecret請(qǐng)參考文檔：http://bestwisewords.com/document_detail/116401.htm?spm=a2c4g.11186623.0.0.6e6027b5GvMJ25
    access_key_id = ""        # 您的AccessKeyId
    access_key_secret = ""    # 您的AccessKeySecret
    # 獲取公共請(qǐng)求參數(shù)
    parameters = get_common_parameters(access_key_id)
    # 添加業(yè)務(wù)參數(shù)（不同的接口參數(shù)有差異，此處以RecognizeGeneral為例，Url參數(shù)為圖片鏈接）
    parameters['Url'] = "https://example.png"
    # 把業(yè)務(wù)參數(shù)拼接到請(qǐng)求鏈接中
    url = "https://%s/?%s" % (endpoint, '&'.join('%s=%s' % (k, v) for k, v in parameters.items()))
    # 獲取簽名（GET方法）
    signature = get_signature(url, access_key_secret, 'GET')
    # 按照 RFC3986 規(guī)則編碼簽名，并添加到最終的請(qǐng)求鏈接上
    url += "&Signature=" + percentEncode(signature)
    return url


if __name__ == '__main__':
    request_url = get_request_url()
    print(request_url)

package main

import (
	"crypto/hmac"
	"crypto/rand"
	"crypto/sha1"
	"encoding/base64"
	"fmt"
	"net/url"
	"sort"
	"strings"
	"time"
)

// uuid 生成隨機(jī)字符串，作為 SignatureNonce
func uuid() string {
	b := make([]byte, 16)
	_, err := rand.Read(b)
	if err != nil {
		panic(err)
	}
	return fmt.Sprintf("%X-%X-%X-%X-%X", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
}

func percentEncode(s string) string {
	s = url.QueryEscape(s)
	s = strings.ReplaceAll(s, "+", "%20")
	s = strings.ReplaceAll(s, "*", "%2A")
	s = strings.ReplaceAll(s, "%7E", "~")
	return s
}

// getCommonParameters 獲取公共請(qǐng)求參數(shù)。公共請(qǐng)求參數(shù)詳見文檔：http://bestwisewords.com/document_detail/145074.html
func getCommonParameters(accessKeyId string) map[string]string {
	return map[string]string{
		"Action":           "RecognizeGeneral",                                  // 調(diào)用的接口名稱，此處以 RecognizeGeneral 為例
		"Version":          "2021-07-07",                                        // API版本。OCR的固定值：2021-07-07
		"Format":           "JSON",                                              // 指定接口返回?cái)?shù)據(jù)的格式，可以選擇 JSON 或者 XML
		"AccessKeyId":      accessKeyId,                                         // 您的AccessKeyId
		"SignatureNonce":   uuid(),                                              // 簽名唯一隨機(jī)數(shù)
		"Timestamp":        time.Now().UTC().Format("2006-01-02T15:04:05.000Z"), //請(qǐng)求的時(shí)間戳。按照ISO8601標(biāo)準(zhǔn)表示，并需要使用UTC時(shí)間，格式為yyyy-MM-ddTHH:mm:ssZ。示例：2018-01-01T12:00:00Z表示北京時(shí)間2018年01月01日20點(diǎn)00分00秒。
		"SignatureMethod":  "HMAC-SHA1",                                         // 簽名方式。目前為固定值 HMAC-SHA1
		"SignatureVersion": "1.0",                                               // 簽名方式。目前為固定值 1.0
	}
}

// getSignature 獲取簽名
func getSignature(urlString, secret, httpMethod string) string {
	// 解析url中的參數(shù)部分
	u, err := url.Parse(urlString)
	if err != nil {
		panic(err)
	}
	rawQuery := u.RawQuery
	// 把url的請(qǐng)求參數(shù)名稱記錄到 slice 中
	queryMap, err := url.ParseQuery(rawQuery)
	if err != nil {
		panic(err)
	}
	keys := make([]string, 0)
	for k := range queryMap {
		keys = append(keys, k)
	}
	// 按照請(qǐng)求參數(shù)字典順序排序
	sort.Strings(keys)
	// 初始化規(guī)范化的請(qǐng)求字符串
	canonicalString := ""
	for i, k := range keys {
		canonicalString += fmt.Sprintf("%s=%s", percentEncode(k), percentEncode(queryMap[k][0]))
		if i < len(keys)-1 {
			canonicalString += "&"
		}
	}
	// 將規(guī)范化字符串拼接成待簽名的字符串
	stringToSign := httpMethod + "&" + percentEncode("/") + "&" + percentEncode(canonicalString)
	// 把 AccessKeySecret加上"&"構(gòu)成 HMAC-SHA1 算法的key
	secret += "&"
	// HMAC-SHA1 編碼后的bytes
	h := hmac.New(sha1.New, []byte(secret))
	_, err = h.Write([]byte(stringToSign))
	if err != nil {
		panic(err)
	}
	b := h.Sum(nil)
	// 按照 base64 編碼規(guī)則生成最后的簽名字符串
	signature := base64.StdEncoding.EncodeToString(b)
	return signature
}

// getRequestUrl 獲取完整的請(qǐng)求URL
func getRequestUrl() string {
	endpoint := "ocr-api.cn-hangzhou.aliyuncs.com"
	// 如何獲取AccessKeyId、AccessKeySecret請(qǐng)參考文檔：http://bestwisewords.com/document_detail/116401.htm?spm=a2c4g.11186623.0.0.6e6027b5GvMJ25
	accessKeyId := ""     // 您的AccessKeyId
	accessKeySecret := "" // 您的AccessKeySecret
	// 獲取公共請(qǐng)求參數(shù)
	parameters := getCommonParameters(accessKeyId)
	// 添加業(yè)務(wù)參數(shù)（不同的接口參數(shù)有差異，此處以RecognizeGeneral為例，Url參數(shù)為圖片鏈接）
	parameters["Url"] = "https://example.png"
	// 把業(yè)務(wù)參數(shù)拼接到請(qǐng)求鏈接中
	url := "https://" + endpoint + "/?"
	for k, v := range parameters {
		url += fmt.Sprintf("%s=%s&", k, v)
	}
  // 去掉url最后的"&"
  url = url[:len(url)-1]
	// 獲取簽名
	signature := getSignature(url, accessKeySecret, "GET")
	// 按照 RFC3986 規(guī)則編碼簽名，并添加到最終的請(qǐng)求鏈接上
	url += "&Signature=" + percentEncode(signature)
	return url
}

func main() {
	url := getRequestUrl()
	fmt.Println(url)
}

const url = require("url");
const crypto = require("crypto");

const percentEncode = (s) => {
  return encodeURIComponent(s)
    .replace(/\+/g, "%20")
    .replace(/\*/g, "%2A")
    .replace(/%7E/g, "~");
};

// 獲取公共請(qǐng)求參數(shù)。公共請(qǐng)求參數(shù)詳見文檔：http://bestwisewords.com/document_detail/145074.html
const getCommonParameters = (accessKeyId) => {
  return {
    Action: "RecognizeGeneral", // 調(diào)用的接口名稱，此處以 RecognizeGeneral 為例
    Version: "2021-07-07", // API版本。OCR的固定值：2021-07-07
    Format: "JSON", // 指定接口返回?cái)?shù)據(jù)的格式，可以選擇 JSON 或者 XML
    AccessKeyId: accessKeyId, // 您的AccessKeyId
    SignatureNonce: crypto.randomBytes(16).toString("hex"), // 簽名唯一隨機(jī)數(shù)
    Timestamp: new Date().toISOString(), // 請(qǐng)求的時(shí)間戳。按照ISO8601標(biāo)準(zhǔn)表示，并需要使用UTC時(shí)間，格式為yyyy-MM-ddTHH:mm:ssZ
    SignatureMethod: "HMAC-SHA1", // 簽名方式。目前為固定值 HMAC-SHA1
    SignatureVersion: "1.0", // 簽名方式。目前為固定值 1.0
  };
};

// 獲取簽名
const getSignature = (urlString, secret, httpMethod) => {
  // 解析url中的參數(shù)部分
  const query = url.parse(urlString, true).query;
  // 按照請(qǐng)求參數(shù)字典順序排序
  keys = Object.keys(query).sort();
  // 初始化規(guī)范化的請(qǐng)求字符串
  canonicalString = "";
  for (const k of keys) {
    // 按照 RFC3986 規(guī)則編碼參數(shù)名稱
    let encodedParam = percentEncode(k);
    // 按照 RFC3986 規(guī)則編碼參數(shù)值
    let encodedValue = percentEncode(query[k]);
    // 把編碼后的參數(shù)名稱和值用英文等號(hào)（=）拼接起來，然后用 "&" 連接
    canonicalString += `&${encodedParam}=${encodedValue}`;
  }
  // 去掉開頭的 "&"
  canonicalString = canonicalString.substring(1);
  // 將規(guī)范化字符串拼接成待簽名的字符串
  let stringToSign =
    httpMethod +
    "&" +
    percentEncode("/") +
    "&" +
    percentEncode(canonicalString);
  // 把 AccessKeySecret加上"&"構(gòu)成 HMAC-SHA1 算法的key
  secret += "&";
  // HMAC-SHA1 編碼后的bytes
  let res = crypto.createHmac("sha1", secret).update(stringToSign).digest();
  // 按照 base64 編碼規(guī)則生成最后的簽名字符串
  let signature = res.toString("base64");
  return signature;
};

// 獲取完整的請(qǐng)求URL
const getRequestUrl = () => {
  const endpoint = "ocr-api.cn-hangzhou.aliyuncs.com";
  // 如何獲取AccessKeyId、AccessKeySecret請(qǐng)參考文檔：http://bestwisewords.com/document_detail/116401.htm?spm=a2c4g.11186623.0.0.6e6027b5GvMJ25
  const accessKeyId = "";        // 您的AccessKeyId
  const accessKeySecret = "";    // 您的AccessKeySecret
  // 獲取公共請(qǐng)求參數(shù)
  let parameters = getCommonParameters(accessKeyId);
  // 添加業(yè)務(wù)參數(shù)（不同的接口參數(shù)有差異，此處以RecognizeGeneral為例，Url參數(shù)為圖片鏈接）
  parameters["Url"] = "https://example.png";
  // 把業(yè)務(wù)參數(shù)拼接到請(qǐng)求鏈接中
  let requestUrl = `https://${endpoint}/?`;
  for (const key in parameters) {
    requestUrl += `${key}=${parameters[key]}&`;
  }
  requestUrl = requestUrl.substring(0, requestUrl.length - 1);
  // 獲取簽名
  const signature = getSignature(requestUrl, accessKeySecret, "GET");
  // 按照 RFC3986 規(guī)則編碼簽名，并添加到最終的請(qǐng)求鏈接上
  requestUrl += `&Signature=${percentEncode(signature)}`;
  return requestUrl;
};

const res = getRequestUrl();
console.log(res);