java - 生成有效的 URL Google Places API

Question

我正在开发一个必须执行 Google Places API 请求的应用程序。

http://code.google.com/intl/es/apis/maps/documentation/places/

我在以下网站上获得了私钥:

https://code.google.com/apis/console

客户端 ID:XXXXXXXXXXX.apps.googleusercontent.com

客户端密码:YYYYYYYYYYYYYYYYY(看起来像 vNIXE0xscrmjlyV-12Nj_BvUPaw= )

我正在使用此代码生成 URL:

public class UrlSigner {

  // Note: Generally, you should store your private key someplace safe
  // and read them into your code

  private static String keyString = "YYYYYYYYYYYYYYYYYY";

  // The URL shown in these examples must be already
  // URL-encoded. In practice, you will likely have code
  // which assembles your URL from user or web service input
  // and plugs those values into its parameters.
  private static String urlString = "http://maps.google.com/maps/api/place/search/json?location=40.717859,-73.957790&radius=1600&client=XXXXXXXXXXX.apps.googleusercontent.com&sensor=false";

  // This variable stores the binary key, which is computed from the string (Base64) key
  private static byte[] key;

  public static void main(String[] args) throws IOException,
    InvalidKeyException, NoSuchAlgorithmException, URISyntaxException {

    // Convert the string to a URL so we can parse it
    URL url = new URL(urlString);

    UrlSigner signer = new UrlSigner(keyString);
    String request = signer.signRequest(url.getPath(),url.getQuery());

    System.out.println("Signed URL :" + url.getProtocol() + "://" + url.getHost() + request);
  }

  public UrlSigner(String keyString) throws IOException {
    // Convert the key from 'web safe' base 64 to binary
    keyString = keyString.replace('-', '+');
    keyString = keyString.replace('_', '/');
    System.out.println("Key: " + keyString);
    this.key = Base64.decode(keyString);
  }

  public String signRequest(String path, String query) throws NoSuchAlgorithmException,
    InvalidKeyException, UnsupportedEncodingException, URISyntaxException {

    // Retrieve the proper URL components to sign
    String resource = path + '?' + query;

    // Get an HMAC-SHA1 signing key from the raw key bytes
    SecretKeySpec sha1Key = new SecretKeySpec(key, "HmacSHA1");

    // Get an HMAC-SHA1 Mac instance and initialize it with the HMAC-SHA1 key
    Mac mac = Mac.getInstance("HmacSHA1");
    mac.init(sha1Key);

    // compute the binary signature for the request
    byte[] sigBytes = mac.doFinal(resource.getBytes());

    // base 64 encode the binary signature
    String signature = Base64.encodeBytes(sigBytes);

    // convert the signature to 'web safe' base 64
    signature = signature.replace('+', '-');
    signature = signature.replace('/', '_');

    return resource + "&signature=" + signature;
  }
}

代码工作正常:它返回一个 URL，但 URL 给出了这个错误:

1. That’s an error. The requested URL /maps/api/place/search/json?.(...) was not found on this server. That’s all we know.

我尝试通过 XXXXXXXXXXX 更改 ClientID (XXXXXXXXXXX.apps.googleusercontent.com)，但它仍然无法正常工作。有人知道我做错了什么吗？

非常感谢!

Answer 1

问题是您没有到达 google 端的端点。甚至没有 places-api-service 收到您的请求。

尝试使用以下 urlString:

private static String urlString = "http://maps.googleapis.com/maps/api/place/search/json?location=..."

重要的区别是 googleapis 而不是 google。在浏览器中输入你创建的 url，然后你会看到，你会得到一些 json(即使它是一个被拒绝的请求)。然后您知道您到达了一个 api 端点。

编辑:我认为谷歌最近将域更改为 googleapis。您使用的西类牙语文档使用 google，而英语文档使用 googleapis。我认为西类牙语文档不是最新的。也许您将该信息发布到谷歌(也许在论坛上)