提供程序凭据颁发之前的 Oauth 令牌请求

Question

如果我问一些愚蠢的问题，请原谅我，我是这里的新手。我需要在我的 Java 应用程序中实现 OAuth，以针对 launchpad.net API 进行身份验证。该文档指定了具有三个参数的令牌请求的启动：例如oauth_consumer_key（我的应用程序的名称），oauth_signature_method例如"PLAINTEXT"和oauth_signature例如字符串"&"。我意识到大多数OAuth库都需要我已经从以下位置获取了使用者密钥和使用者 ID/机密OAuth 提供程序（例如在 Twitter 中发布的），大多数示例都是以这种方式组织的。但是，launchpad.net 只会在发出请求令牌后发出这些参数（它们不使用第三方提供程序）。我该如何继续？在尝试了一些抛出错误的库后，我目前陷入困境。非常感谢任何有用的信息。官方的启动板库是用python编写的。

我的初始代码如下：

public class Quicky {
    public static void main(String[] args) throws Exception {
        CloseableHttpClient httpclient = HttpClients.createDefault();
        try {
            HttpGet httpGet = new HttpGet("https://launchpad.net/+request-token");
            CloseableHttpResponse response1 = httpclient.execute(httpGet);
try {
                System.out.println("Your current GET request status:" + response1.getStatusLine());
                HttpEntity entity1 = response1.getEntity();
  EntityUtils.consume(entity1);
            } finally {
                response1.close();
            }
            HttpRequest request;
            HttpPost httpPost = new HttpPost("https://launchpad.net/+request-token");
            PostMethod poster = new PostMethod();
            List <NameValuePair> postParams = new ArrayList <NameValuePair>();
            postParams.add(new BasicNameValuePair("oauth_customer_key", "XXXX"));
            postParams.add(new BasicNameValuePair("oauth_signature_method", "PLAINTEXT"));
            postParams.add(new BasicNameValuePair("oauth_signature", "&"));
   httpPost.setEntity(new UrlEncodedFormEntity(postParams, "utf-8"));
//            httpPost.setEntity(entity1);
            httpclient.execute(httpPost);
            HttpParameters requestParams = (HttpParameters) postParams;
            CloseableHttpResponse response2 = httpclient.execute(httpPost);
            try {
                System.out.println("Your current POST request status:" + response2.getStatusLine());
                HttpEntity entity2 = response2.getEntity();
                // do something useful with the response body
                // and ensure it is fully consumed
                EntityUtils.consume(entity2);
            } finally {
                response2.close();
            }
        } finally {
            httpclient.close();
        }
    }
}

Answer 1

经过一些研究和代码重构，我终于解决了问题错误消息。正确的代码如下，也许它对那里的人有用。

    public class LaunchPadTokenRetriever {  
   public static void main(String[] args) throws ClientProtocolException,       IOException{
    CloseableHttpClient httpclient = HttpClients.createDefault();
    HttpPost httpPost = new HttpPost("https://launchpad.net/+request-token");
    httpPost.addHeader("Content-Type", "application/x-www-form-urlencoded");
    List <NameValuePair> urlParams = new ArrayList <NameValuePair>();
    urlParams.add(new BasicNameValuePair("oauth_signature", "&"));
    urlParams.add(new BasicNameValuePair("oauth_consumer_key", "tester"));
    urlParams.add(new BasicNameValuePair("oauth_signature_method", "PLAINTEXT"));
    httpPost.setEntity(new UrlEncodedFormEntity(urlParams));
    CloseableHttpResponse response = httpclient.execute(httpPost);
    System.out.println(response);
    try {
      System.out.println(response.getStatusLine());
      HttpEntity entity = response.getEntity();
      ResponseHandler<String> responseHandler = new BasicResponseHandler();
      String responseBody =  httpclient.execute(httpPost, responseHandler);
      System.out.println("Initial credentials ---> "+ responseBody);
      System.out.println();    
      String getresponse = responseBody;
      EntityUtils.consume(entity);
    } finally {
      response.close();
    }
  }
}