Question

如何在JavaScript中生成有效签名，我有一个业务密钥和客户端ID但无法继续进行静态映射api有效url签名，因为我使用JavaScript调用此API并且想要发送签名和客户端ID以充分利用我的使用限制。

Answer 1

这是Google提供的示例Javascript（node.js）代码的链接，用于在其documentation中签名静态地图URL：

https://github.com/googlemaps/url-signing/blob/gh-pages/urlSigner.js

我已经将代码转换为gmaps-url-signer节点/ npm模块。您可以通过以下方式使用它通过gmaps-url-signer库对静态地图URL进行签名：

const urlSigner = require('gmaps-url-signer');

const key = 'my_google_api_key';
const secret = 'my_static_maps_secret';
const domain = 'http://maps.googleapis.com';

// Path to your static map
let path = '/maps/api/staticmap?zoom=2&scale=1&size=350x250&maptype=terrain&format=png&visual_refresh=true';
path += `&key=${key}`;

console.log('Full signed URL:');
console.log(domain + urlSigner.sign(path, secret));

Answer 2

Google's URL Signing Samples

包括以下语言的示例，包括Node / JS：

Python
Java
节点/ JS
PHP
C＃
Perl
Ruby
VB.NET
Objective-C

对于Node / JS，它看起来像这样：

'use strict'

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

/**
 * Convert from 'web safe' base64 to true base64.
 *
 * @param  {string} safeEncodedString The code you want to translate
 *                                    from a web safe form.
 * @return {string}
 */
function removeWebSafe(safeEncodedString) {
  return safeEncodedString.replace(/-/g, '+').replace(/_/g, '/');
}

/**
 * Convert from true base64 to 'web safe' base64
 *
 * @param  {string} encodedString The code you want to translate to a
 *                                web safe form.
 * @return {string}
 */
function makeWebSafe(encodedString) {
  return encodedString.replace(/\+/g, '-').replace(/\//g, '_');
}

/**
 * Takes a base64 code and decodes it.
 *
 * @param  {string} code The encoded data.
 * @return {string}
 */
function decodeBase64Hash(code) {
  // "new Buffer(...)" is deprecated. Use Buffer.from if it exists.
  return Buffer.from ? Buffer.from(code, 'base64') : new Buffer(code, 'base64');
}

/**
 * Takes a key and signs the data with it.
 *
 * @param  {string} key  Your unique secret key.
 * @param  {string} data The url to sign.
 * @return {string}
 */
function encodeBase64Hash(key, data) {
  return crypto.createHmac('sha1', key).update(data).digest('base64');
}

/**
 * Sign a URL using a secret key.
 *
 * @param  {string} path   The url you want to sign.
 * @param  {string} secret Your unique secret key.
 * @return {string}
 */
function sign(path, secret) {
  const uri = url.parse(path);
  const safeSecret = decodeBase64Hash(removeWebSafe(secret));
  const hashedSignature = makeWebSafe(encodeBase64Hash(safeSecret, uri.path));
  return url.format(uri) + '&signature=' + hashedSignature;
}

Answer 3

Google不建议使用JavaScript对URL进行签名，因为它会向用户公开加密密钥。

您可以在此链接中看到：

https://developers.google.com/maps/documentation/business/faq#signature_jses

Answer 4

如果你的意思是你有一个Javascript服务器（NodeJS / Meteor）并且想要获得签名的URL，我会使用这个包。

https://github.com/temsa/qs-google-signature

Google Static Maps API：JavaScript中的URL签名

4 个答案:

Google's URL Signing Samples