Java/Apache Common/Http Client

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Версия от 10:23, 1 июня 2010; Admin (обсуждение | вклад) (1 версия)
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Basic Authentication Execute JSP Method

   <source lang="java">

import org.apache.rumons.httpclient.URI; import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.methods.GetMethod; import org.apache.rumons.httpclient.HostConfiguration; public class BasicAuthenticationExecuteJSPMethod { 

 public static void main(String args[]) throws Exception {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("parameterKey", "value");
   HostConfiguration host = client.getHostConfiguration();
   host.setHost(new URI("http://localhost:8080", true));
   GetMethod method = new GetMethod("/commons/folder/protected.jsp");
   try{
     client.executeMethod(host, method);
     System.err.println(method.getStatusLine());
     System.err.println(method.getResponseBodyAsString());
   } catch(Exception e) {
     System.err.println(e);
   } finally {
     method.releaseConnection();
   }
 }

} 

      </source>



Basic Authentication For JSP Page

   <source lang="java">

import org.apache.rumons.httpclient.URI; import org.apache.rumons.httpclient.HttpState; import org.apache.rumons.httpclient.HttpStatus; import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.Credentials; import org.apache.rumons.httpclient.auth.AuthScope; import org.apache.rumons.httpclient.methods.GetMethod; import org.apache.rumons.httpclient.HostConfiguration; import org.apache.rumons.httpclient.UsernamePasswordCredentials; public class BasicAuthenticationForJSPPage { 

 public static void main(String args[]) throws Exception {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "My Browser");
   HostConfiguration host = client.getHostConfiguration();
   host.setHost(new URI("http://localhost:8080", true));
   Credentials credentials = new UsernamePasswordCredentials("tomcat", "tomcat");
   AuthScope authScope =new AuthScope(host.getHost(), host.getPort());
   HttpState state = client.getState();
   state.setCredentials(authScope, credentials);
   GetMethod method = new GetMethod("/commons/chapter01/protected.jsp");
   try{
     client.executeMethod(host, method);
     System.err.println(method.getStatusLine());
     System.err.println(method.getResponseBodyAsString());
   } catch(Exception e) {
     System.err.println(e);
   } finally {
     method.releaseConnection();
   }
 }

} 

      </source>



Basic Authentication Get JSP Method Return Code

   <source lang="java">

import org.apache.rumons.httpclient.URI; import org.apache.rumons.httpclient.HttpState; import org.apache.rumons.httpclient.HttpStatus; import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.Credentials; import org.apache.rumons.httpclient.auth.AuthScope; import org.apache.rumons.httpclient.methods.GetMethod; import org.apache.rumons.httpclient.HostConfiguration; import org.apache.rumons.httpclient.UsernamePasswordCredentials; public class BasicAuthenticationGetJSPMethodReturnCode { 

 public static void main(String args[]) throws Exception {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "My Browser");
   HostConfiguration host = client.getHostConfiguration();
   host.setHost(new URI("http://localhost:8080", true));
   GetMethod method = new GetMethod("/commons/folder/protected.jsp");
   try{
     int statusCode = client.executeMethod(host, method);
     if(statusCode == HttpStatus.SC_UNAUTHORIZED) {
       System.err.println("Authorization required by server");
       Credentials credentials =new UsernamePasswordCredentials("tomcat", "tomcat");
       AuthScope authScope = new AuthScope(host.getHost(), host.getPort());
       HttpState state = client.getState();
       state.setCredentials(authScope, credentials);
       client.executeMethod(host, method);
     }
     System.err.println(method.getStatusLine());
     System.err.println(method.getResponseBodyAsString());
   } catch(Exception e) {
     System.err.println(e);
   } finally {
     method.releaseConnection();
   }
 }

} 

      </source>



Connect Method Example For Proxy Client

   <source lang="java">

import org.apache.rumons.httpclient.ProxyClient; import org.apache.rumons.httpclient.ConnectMethod; import org.apache.rumons.httpclient.ProxyClient.ConnectResponse; import java.net.Socket; public class ConnectMethodExampleForProxyClient { 

 public static void main(String args[]) {
   ProxyClient client = new ProxyClient();
   client.getParams().setParameter("http.useragent","Proxy Test Client");
   client.getHostConfiguration().setHost("www.somehost.ru");
   client.getHostConfiguration().setProxy("localproxyaddress",80);
   Socket socket = null;
   try{
     ConnectResponse response = client.connect();
     socket = response.getSocket();
     if(socket == null) {
       ConnectMethod method = response.getConnectMethod();
       System.err.println("Socket not created: " + method.getStatusLine());
     }
     // do something
   } catch (Exception e) {
     System.err.println(e);
   } finally {
     if(socket != null) 
         try { 
             socket.close(); 
         } catch (Exception fe) {}
   }
 }

} 

      </source>



Execute Http method (post/get)

   <source lang="java">

import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.HostConfiguration; import org.apache.rumons.httpclient.methods.GetMethod; public class HttpClientPreferences { 

public static void main(String args[]) throws Exception {
     HttpClient client = new HttpClient();
   
     System.err.println("The User Agent before changing it is: " + client.getParams().getParameter("http.useragent"));
   
     client.getParams().setParameter("http.useragent","Browser at Client level");
   
     System.err.println("Client"s User Agent is: " + client.getParams().getParameter("http.useragent"));
   
     GetMethod method = new GetMethod("http://www.google.ru");
     method.getParams().setParameter("http.useragent","Browser at Method level");
     try{
         client.executeMethod(method);
     }catch(Exception e) { 
         System.err.println(e); 
     }finally { 
         method.releaseConnection(); 
     }
     System.err.println("Method"s User Agent is: " +  method.getParams().getParameter("http.useragent"));
}

} 

      </source>



Get allowed http methods

   <source lang="java">

import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.HttpStatus; import org.apache.rumons.httpclient.methods.OptionsMethod; import java.util.Enumeration; public class OptionsMethodExample { 

 public static void main(String args[]) {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "Test Client");
   OptionsMethod method = new OptionsMethod("http://www.google.ru");
   try{
     int returnCode = client.executeMethod(method);
     Enumeration list = method.getAllowedMethods();
     while(list.hasMoreElements()) {
       System.err.println(list.nextElement());
         }
   } catch (Exception e) {
     System.err.println(e);
   } finally {
     method.releaseConnection();
   }
 }

} 

      </source>



Get Cookie value and set cookie value

   <source lang="java">

import org.apache.rumons.httpclient.Cookie; import org.apache.rumons.httpclient.HttpState; import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.methods.GetMethod; public class GetCookiePrintAndSetValue { 

 public static void main(String args[]) throws Exception {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "My Browser");
   GetMethod method = new GetMethod("http://localhost:8080/");
   try{
     client.executeMethod(method);
     Cookie[] cookies = client.getState().getCookies();
     for (int i = 0; i < cookies.length; i++) {
       Cookie cookie = cookies[i];
       System.err.println(
         "Cookie: " + cookie.getName() +
         ", Value: " + cookie.getValue() +
         ", IsPersistent?: " + cookie.isPersistent() +
         ", Expiry Date: " + cookie.getExpiryDate() +
         ", Comment: " + cookie.getComment());
       cookie.setValue("My own value");
     }
     client.executeMethod(method);
   } catch(Exception e) {
     System.err.println(e);
   } finally {
     method.releaseConnection();
   }
 }

} 

      </source>



Get Http client parameters

   <source lang="java">

import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.HttpVersion; import org.apache.rumons.httpclient.methods.GetMethod; import org.apache.rumons.httpclient.HostConfiguration; public class HttpClientParameter { 

 public static void main(String args[]) throws Exception {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "My Browser");
   HostConfiguration host = client.getHostConfiguration();
   host.setHost("www.google.ru");
   GetMethod method = new GetMethod("http://www.yahoo.ru");
   int returnCode = client.executeMethod(host, method);
   System.err.println(method.getResponseBodyAsString());
   System.err.println("User-Agent: " + method.getHostConfiguration().getParams().getParameter("http.useragent"));
   System.err.println("User-Agent: " + method.getParams().getParameter("http.useragent"));
   method.releaseConnection();
 }

} 

      </source>



Get Http methods

   <source lang="java">

import org.apache.rumons.httpclient.URI; import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.HttpStatus; import org.apache.rumons.httpclient.HttpException; import org.apache.rumons.httpclient.methods.GetMethod; import org.apache.rumons.httpclient.HostConfiguration; import org.apache.rumons.httpclient.protocol.Protocol; import java.io.File; import java.io.IOException; import java.io.FileOutputStream; public class GetMethodExample { 

 public static void main(String args[]) {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "Test Client");
   client.getParams().setParameter("http.connection.timeout",new Integer(5000));
   GetMethod method  = new GetMethod();
   FileOutputStream fos = null;
   try {
     method.setURI(new URI("http://www.google.ru", true));
     int returnCode = client.executeMethod(method);
     if(returnCode != HttpStatus.SC_OK) {
       System.err.println(
         "Unable to fetch default page, status code: " + returnCode);
     }
     System.err.println(method.getResponseBodyAsString());
     method.setURI(new URI("http://www.google.ru/images/logo.gif", true));
     returnCode = client.executeMethod(method);
     if(returnCode != HttpStatus.SC_OK) {
       System.err.println("Unable to fetch image, status code: " + returnCode);
     }
     byte[] imageData = method.getResponseBody();
     fos = new FileOutputStream(new File("google.gif"));
     fos.write(imageData);
     HostConfiguration hostConfig = new HostConfiguration();
     hostConfig.setHost("www.yahoo.ru", null, 80, Protocol.getProtocol("http"));
     method.setURI(new URI("/", true));
     client.executeMethod(hostConfig, method);
     System.err.println(method.getResponseBodyAsString());
   } catch (HttpException he) {
     System.err.println(he);
   } catch (IOException ie) {
     System.err.println(ie);
   } finally {
     method.releaseConnection();
     if(fos != null) try { fos.close(); } catch (Exception fe) {}
   }
 }

} 

      </source>



Http Client Simple Demo

   <source lang="java">

import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.methods.GetMethod; public class HttpClientTest { 

public static void main(String args[]) throws Exception {
     HttpClient client = new HttpClient();
     GetMethod method = new GetMethod("http://www.google.ru");
     int returnCode = client.executeMethod(method);
     System.err.println(method.getResponseBodyAsString());
     method.releaseConnection();
}

} 

      </source>



Http post method Example

   <source lang="java">

import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.HttpStatus; import org.apache.rumons.httpclient.methods.PostMethod; import java.io.BufferedReader; import java.io.InputStreamReader; public class PostMethodExample { 

 public static void main(String args[]) {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "Test Client");
   BufferedReader br = null;
   PostMethod method = new PostMethod("http://search.yahoo.ru/search");
   method.addParameter("p", "\"jexp\"");
   try{
     int returnCode = client.executeMethod(method);
     if(returnCode == HttpStatus.SC_NOT_IMPLEMENTED) {
       System.err.println("The Post method is not implemented by this URI");
       // still consume the response body
       method.getResponseBodyAsString();
     } else {
       br = new BufferedReader(new InputStreamReader(method.getResponseBodyAsStream()));
       String readLine;
       while(((readLine = br.readLine()) != null)) {
         System.err.println(readLine);
     }
     }
   } catch (Exception e) {
     System.err.println(e);
   } finally {
     method.releaseConnection();
     if(br != null) try { br.close(); } catch (Exception fe) {}
   }
 }

} 

      </source>



Using Http Client Inside Thread

   <source lang="java">

import org.apache.rumons.httpclient.URI; import org.apache.rumons.httpclient.HttpClient; import org.apache.rumons.httpclient.methods.GetMethod; import org.apache.rumons.httpclient.HostConfiguration; public class UsingHttpClientInsideThread { 

 public static void main(String args[]) throws Exception {
   HttpClient client = new HttpClient();
   client.getParams().setParameter("http.useragent", "Test Client");
   HostConfiguration host = new HostConfiguration();
   host.setHost(new URI("http://localhost:8080", true));
   // first Get a big file
   MethodThread bigDataThread =  new MethodThread(client, host, "/big_movie.wmv");
   bigDataThread.start();
   // next try and get a small file
   MethodThread normalThread = new MethodThread(client, host, "/");
   normalThread.start();
 }

} class MethodThread extends Thread { 

 private HttpClient client;
 private HostConfiguration host;
 private GetMethod method;
 public MethodThread(HttpClient client, HostConfiguration host, String resource) {
   this.client = client;
   this.host = host;
   this.method = new GetMethod(resource);
 }
 public void run() {
   System.err.println("Connecting to: " + host);
   try{
     client.executeMethod(host, method);
     method.getResponseBodyAsStream();
   } catch(Exception e) {
     System.err.println(e);
   } finally {
     method.releaseConnection();
   }
 }

} 

      </source>
Источник — «http://jexp.ru/index.php?title=Java/Apache_Common/Http_Client&oldid=9037»