如何在HttpClient中做请求？

2 回答

• 1

  @sudo尝试这个简单的代码

  HttpURLConnection conn = null;

  try {
          // The formated URL will be "http://www.androidcoder.org:80".
          URL url = new URL(String.format("http://%s:%d/%s", mIpAddress, mPort, mSubPage));
          conn = (HttpURLConnection) url.openConnection();
  
          conn.setRequestMethod("GET");
          conn.setRequestProperty("Content-length", "0");
          conn.setUseCaches(false);
          conn.setAllowUserInteraction(false);
          conn.setConnectTimeout(TIMEOUT);
          conn.setReadTimeout(TIMEOUT);
  
          // NOTE: Below is used to perform the http authentication. It is working in JAVA but not
          // always working in Android platform.
  
          // Set to use the default HTTP authentication. Working in JAVA, but not working in
          // Android.
          Authenticator.setDefault(new Authenticator() {
              protected PasswordAuthentication getPasswordAuthentication() {
                  return new PasswordAuthentication("user1", "pass1".toCharArray());
              }
          });
          conn.connect();
  
          System.out.println(conn.getResponseCode()); // <-- The request will stop here if running
                                                      // in Android.
          System.out.println(conn.getResponseMessage());
  
          printOutput(conn);
  
      } catch (MalformedURLException e) {
          // TODO: Auto-generated catch block
          e.printStackTrace();
      } catch (IOException e) {
          // Operation timed out.
          System.out.println(e.getMessage());
          e.printStackTrace();
      } finally {
          if (conn != null) {
              conn.disconnect();
              conn = null;
          }
      }
  }
  
  /**
   * @brief print the output of the HTTP connection.
   * @param conn [in] Http connection.
   */
  private static void printOutput(HttpURLConnection conn) throws IOException {
      int length = 256;
      byte bytes[] = new byte[length];
      InputStream is = conn.getInputStream();
  
      while (is.available() > 0) {
  
          if (is.available() < length) {
              length = is.available();
          }
          conn.getInputStream().read(bytes, 0, length);
          System.out.println(bytes);
      }
  }
  

  回复于 2024-04-25T08:03:53+08:00
• 2

  package com.android.demo;
  
  
  import org.apache.http.HttpEntity;
  
  import org.apache.http.HttpHost;
  
  import org.apache.http.HttpResponse;
  
  import org.apache.http.auth.AuthScope;
  
  import org.apache.http.auth.UsernamePasswordCredentials;
  
  import org.apache.http.client.HttpClient;
  
  import org.apache.http.client.methods.HttpGet;
  
  import org.apache.http.impl.auth.BasicScheme;
  
  import org.apache.http.impl.client.AbstractHttpClient;
  
  import org.apache.http.impl.client.DefaultHttpClient;
  
  import org.apache.http.protocol.BasicHttpContext;
  
  import org.apache.http.util.EntityUtils;
  
  import android.app.Activity;
  import android.os.Bundle;
  
  public class MyActivity extends Activity{
  
  @Override
  protected void onCreate(Bundle savedInstanceState) {
      // TODO Auto-generated method stub
      super.onCreate(savedInstanceState);
      setContentView(R.layout.main);
       /* START Test/Play with beanstalk API */
      String username = "user1";
      String host = "my.host.com";
      String password = "password";
  
      String urlBasePath = "http://" + username + ".host.com/api/";
      String urlApiCall_FindAllRepositories = urlBasePath
              + "repositories.xml";
  
      try {
          HttpClient client = new DefaultHttpClient();
  
          AuthScope as = new AuthScope(host, 443);
          UsernamePasswordCredentials upc = new UsernamePasswordCredentials(
                  username, password);
  
          ((AbstractHttpClient) client).getCredentialsProvider()
                  .setCredentials(as, upc);
  
          BasicHttpContext localContext = new BasicHttpContext();
  
          BasicScheme basicAuth = new BasicScheme();
          localContext.setAttribute("preemptive-auth", basicAuth);
  
          HttpHost targetHost = new HttpHost(host, 443, "https");
  
          HttpGet httpget = new HttpGet(urlApiCall_FindAllRepositories);
          httpget.setHeader("Content-Type", "application/xml");
  
          HttpResponse response = client.execute(targetHost, httpget,
                  localContext);
  
          HttpEntity entity = response.getEntity();
          Object content = EntityUtils.toString(entity);
  
  
  
      } catch (Exception e) {
          e.printStackTrace();
  
      }
  
  
  }
  }
  

  希望这段代码能有所帮助

  回复于 2024-04-25T08:03:53+08:00