DownloadPackageClient.java

<syntaxhighlight lang="java" enclose="div">

import com.platform.api.*;

import java.io.File; import java.io.FileOutputStream; import java.io.IOException; import java.lang.reflect.InvocationTargetException;

import org.apache.commons.httpclient.DefaultHttpMethodRetryHandler; import org.apache.commons.httpclient.HttpClient; import org.apache.commons.httpclient.HttpException; import org.apache.commons.httpclient.HttpStatus; import org.apache.commons.httpclient.methods.PostMethod; import org.apache.commons.httpclient.params.HttpMethodParams;

public class DownloadPackageClient {

 public static final String REST_SERVICE = 
     "https://{domainName}/networking/RESTService";
 public static final String USER_NAME = "jimacme.com";
 public static final String PASSWORD = "jimacme";
 
 public static String login() throws Exception
 {    
   String sessionId = null;
   StringBuilder loginRequestXML = 
       new StringBuilder("<?xml version=\"1.0\" ?>") 
             .append("    <longjump ver=\"2.0\">")
             .append("      <login_request>")   
             .append("        <login>").append(USER_NAME).append("</login>")   
             .append("        <password>").append(PASSWORD).append("</password>")
             .append("      </login_request>")
             .append("    </longjump>");
   
     // Create an instance of HttpClient.
     HttpClient client = new HttpClient();
     
     //Create GET method
     PostMethod method = new PostMethod(REST_SERVICE);
     
     //add to Request
     method.addParameter("xml_data", loginRequestXML.toString());    

     // Provide custom retry handler (necessary)
     method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, 
         new DefaultHttpMethodRetryHandler(3, false));
     
     try 
     {
         // Execute the method.
         int statusCode = client.executeMethod(method);
         if (statusCode != HttpStatus.SC_OK) 
         {
           System.err.println("Method failed: " + method.getStatusLine());
         }
     
         // Read the response body.
         byte[] responseBody = method.getResponseBody();          
         String file = new String(responseBody);         
         int indexOfXMLStart = 
             file.indexOf("<?xml version=\"1.0\" encoding=\"UTF-8\"?>");
         int indexOfXMLEnd = file.indexOf("</longjump>");
              
         String xmlPartOfResponse = 
             file.substring(indexOfXMLStart, indexOfXMLEnd + 11);
         
         if(xmlPartOfResponse.contains("<session_id>"))
         {
           int sessionIdBeginTagIndx = xmlPartOfResponse.indexOf("<session_id>");            
           int sessionIdEndTagIndx = xmlPartOfResponse.indexOf("</session_id>") 
                                   + "</session_id>".length();
           
           sessionId = 
               (xmlPartOfResponse.substring(sessionIdBeginTagIndx, sessionIdEndTagIndx))
                   .replace("<session_id>", "")
                   .replace("</session_id>", "")
                   .trim();
         }
         else if (xmlPartOfResponse.contains("<error>"))
         {
           int messageBeginTagIndx = xmlPartOfResponse.indexOf("<message>");           
           int messageEndTagIndx = xmlPartOfResponse.indexOf("</message>") 
                                 + "</message>".length();           
           String message = 
               (xmlPartOfResponse.substring(messageBeginTagIndx, messageEndTagIndx))
                   .replace("<message>", "")
                   .replace("</message>", "")
                   .trim();           
           throw new Exception(message);
         }
         
   }
     catch (HttpException e) 
     {
         e.printStackTrace();         
         throw new InvocationTargetException(e, 
             "Fatal protocol violation: " + e.getMessage());
   } 
     catch (IOException e) 
     {
         e.printStackTrace();          
         throw new InvocationTargetException(e, 
             "Fatal transport error: " + e.getMessage());
   } 
     catch (Exception e)
     {
       e.printStackTrace();
       throw new InvocationTargetException(e, e.getMessage());
     }
     finally 
     {
         // Release the connection.
         method.releaseConnection(); 
         return sessionId;
     }
 }

 public static void pullPackageFromRemoteServer(
     String userName, String password, String url, 
     String packageId, String lastPublished, String filePath)
 {    
   String sessionId = null;
   try
   {
     sessionId = login();
   }
   catch(Exception e)
   {
     System.out.println(e.getMessage());
   }
   
   StringBuilder downLoadPackageXML = new StringBuilder("<?xml version=\"1.0\" ?>") 
      .append("  <longjump ver=\"2.0\">")
      .append("    <resource_download_request>")
      .append("      <session_id>").append(sessionId).append("</session_id>")
      .append("        <type>package</type>")
      .append("        <package_id>").append(packageId).append("</package_id>")
      .append("      <last_published_version>")
      .append(lastPublished).append("</last_published_version>")
      .append("    </resource_download_request>")
      .append("  </longjump>");

   // Create an instance of HttpClient.
   HttpClient client = new HttpClient();
   
   //Create GET method
   PostMethod method = new PostMethod(url);
   
   //add to Request
   method.addParameter("xml_data", downLoadPackageXML.toString());
   
   // Provide custom retry handler (necessary)
   method.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, 
   new DefaultHttpMethodRetryHandler(3, false));    
   try 
   {
     // Execute the method.
     int statusCode = client.executeMethod(method); 
     if (statusCode != HttpStatus.SC_OK) 
     {
       throw new Exception("Method failed: " + method.getStatusLine());
     }
     
     // Read the response body.
     byte[] responseBody = method.getResponseBody();
     File targetFile = null;
     
     if ( method.getResponseHeader("Content-Type").getValue()
           .contains("application/octet-stream"))
     {
       String fileName = method.getResponseHeader("Content-ID").getValue();
       targetFile = new File(filePath + fileName);
       FileOutputStream out = new FileOutputStream(targetFile.getPath());
       out.write(responseBody);
       out.close();
       System.out.println("Package download completed successfully");
     }
     else
     {
       throw new Exception(method.getResponseBodyAsString());
     }      
     
   }
   catch (HttpException e) 
   {
     e.printStackTrace();
   } 
   catch (IOException e) 
   {
     e.printStackTrace();
   } 
   catch (Exception e)
   {
     e.printStackTrace();
   }
   finally 
   {
     // Release the connection.
     method.releaseConnection();
   }    
 }
 
 public static void main(String args[])
 {
   DownloadPackageClient dpc = new DownloadPackageClient();
   try
   {
     String packageId = "8d5dd4c1c4ac4190911d091d0e24fba6";
     String lastPublishedVersion = "false";
     String filePath = "C:\\";

     for(int i=0; i< 1; i++)
     {
        dpc.pullPackageFromRemoteServer(
           USER_NAME, PASSWORD, REST_SERVICE, 
           packageId, lastPublishedVersion, filePath);
     }

   }
   catch(Exception e)
   {
     System.out.println(e.getMessage());
   }
 }

} </syntaxhighlight>