OpenId连接到谷歌给了我Http 400

Question

我正在尝试使用OAuth 2.0 访问Google API

但当我试图获得令牌时，我总是收到http 400

我正在将Tomcat8与Java SDK 8一起使用我不知道怎么了。

private void sendPost(
        final String code, 
        final String clientId, 
        final String clientSecret, 
        final String redirectUri,
        final String grantType) throws Exception {
    String url = "https://accounts.google.com/o/oauth2/token";
    StringBuffer strb = new StringBuffer();
    strb.append("code=" + code);
    strb.append("&client_id=" + clientId);
    strb.append("&client_secret=" + clientSecret);
    strb.append("&redirect_uri=" + redirectUri);
    strb.append("&grant_type=" + grantType);
    String urlParameters = strb.toString();
    URL obj = new URL(url);
    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();
    con.setRequestMethod("POST");
    con.setDoOutput(true);
    con.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
    con.setRequestProperty("Content-Length", String.valueOf(urlParameters.length()));

    // Send post request
    con.setDoOutput(true);
    DataOutputStream wr = new DataOutputStream(con.getOutputStream());
    wr.writeBytes(urlParameters);
    wr.flush();
    wr.close();
    int responseCode = con.getResponseCode();
    System.out.println("nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + urlParameters);
    System.out.println("Response Code : " + responseCode);
    BufferedReader in = new BufferedReader(new InputStreamReader(
            con.getInputStream()));
    String inputLine;
    StringBuffer response = new StringBuffer();
    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();
    // print result
    System.out.println(response.toString());
}

我的输出如下，似乎所有参数都可以。

Sending 'POST' request to URL : https://accounts.google.com/o/oauth2/token
Post parameters : code=<code>.InoAg9JcLi0boiIBeO6P2m94pmoskwI&client_id=<clientid>.apps.googleusercontent.com&client_secret=<secret>&redirect_uri=http://localhost:8080/Oauth/connect&grant_type=authorization_code
Response Code : 400

Answer 1

1. 您想要对参数进行url编码
2. 我认为谷歌不再支持redirect_uri指向"localhost"，所以这意味着你在不同于令牌端点请求的redirect_ui上获得了"代码"