topic Re: How to communicate between sevlet and applet ? in Alfresco Archive

How to communicate between sevlet and applet ?

zengqingyi12 — Tue, 12 May 2009 03:01:06 GMT

Right now, I want to read a pdf from alfresco repository and then I can modify the pdf with applet, after that i will push back the modified document.How can i do to achieve this ?

Re: How to communicate between sevlet and applet ?

mikeh — Tue, 12 May 2009 09:50:42 GMT

You'd need to POST the updated PDF back to the repository using the /api/upload webscript. http://localhost:8080/alfresco/service/script/org/alfresco/repository/upload/upload.post

Thanks,
Mike

Re: How to communicate between sevlet and applet ?

zengqingyi12 — Wed, 13 May 2009 01:57:14 GMT

but how can i retrieve a file ?
i use this code:
java.io.BufferedInputStream in = new java.io.BufferedInputStream(new

java.net.URL("http://localhost:8080/share/proxy/alfresco/api/node/content/workspace/SpacesStore/8063a1ad-b458-42f2-89ab-7ea3ec43544f/NewsLetterDataContext.cs?a=true").openStream());
java.io.FileOutputStream fos = new java.io.FileOutputStream("d:/a.txt");
java.io.BufferedOutputStream bout = new java.io.BufferedOutputStream(fos,1024);
byte data[] = new byte[1024];
while((count = in.read(data,0,1024)) != 0)
{
bout.write(data,0,count);
}
bout.close();
//out.close();
in.close();

and want to retrieve a file, but it results at throw a exception,
what can i do to retrieve a file from Java code?

Re: How to communicate between sevlet and applet ?

mrogers — Wed, 13 May 2009 07:46:29 GMT

Please post the exception, how are we to help without it?
Your URL looks suspicious in particular the 'share/proxy' part.
You probably need to worry about the character set as well.

Re: How to communicate between sevlet and applet ?

zengqingyi12 — Thu, 14 May 2009 04:01:04 GMT

The reason is that I can not get a session to download the code in java code.
what can i do to get a session ????

Re: How to communicate between sevlet and applet ?

zengqingyi12 — Thu, 14 May 2009 06:59:16 GMT

Right now i want to write a java application to download a file in alfresco:
let's say the file's path is :
http://localhost:8080/share/proxy/alfresco/api/node/content/workspace/SpacesStore/1c72a80b-b9d7-4b04-bdb2-abf516603156/%E7%BE%8A%E7%BE%94%E6%AF%9B%E7%BB%87%E7%89%A9.jpg?a=true

I write this code to download that file:


       int count;
        // Authenticator.setDefault(new MyAuthenticator());
          try {

              java.net.URL url = new java.net.URL("http://localhost:8080/share/proxy/alfresco/api/node/content/workspace/SpacesStore/1c72a80b-b9d7-4b04-bdb2-abf516603156/%E7%BE%8A%E7%BE%94%E6%AF%9B%E7%BB%87%E7%89%A9.jpg?a=true");

             //  String userPassword = "admin" + ":" + "mangocreativcde";
             //  String encoding = new sun.misc.BASE64Encoder().encode (userPassword.getBytes());

//              URLConnection uc = url.openConnection();
//              uc.setRequestProperty ("Authorization", "Basic " + encoding);
//              uc.connect();
              java.io.BufferedInputStream in = new java.io.BufferedInputStream(url.openStream());
              java.io.FileOutputStream fos = new java.io.FileOutputStream("d:/a.jpg");
              java.io.BufferedOutputStream bout = new java.io.BufferedOutputStream(fos);
              byte data[] = new byte[1024];
              while ((count = in.read(data)) != -1) {
                  bout.write(data, 0, count);
              }
              bout.close();
//out.close();
              in.close();

          } catch (java.io.IOException e) {
              System.out.println(e.getMessage());
          }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

But it throw such a exception:

Server returned HTTP response code: 401 for URL: http://localhost:8080/share/proxy/alfresco/api/node/content/workspace/SpacesStore/1c72a80b-b9d7-4b04-bdb2-abf516603156/%E7%BE%8A%E7%BE%94%E6%AF%9B%E7%BB%87%E7%89%A9.jpg?a=true
‍‍

I also use

AuthenticationUtils.startSession(USERNAME, PASSWORD);‍

to start a session, but it still doesn't work.
What can i do ?

Re: How to communicate between sevlet and applet ?

mikeh — Thu, 14 May 2009 07:45:50 GMT

No need for a new topic here.

You need to get the document from the Repository, not via the Share proxy.

Change your URL to:

http://localhost:8080/alfresco/service/api/node/content/workspace/SpacesStore/1c72a80b-b9d7-4b04-bdb2-abf516603156/%E7%BE%8A%E7%BE%94%E6%AF%9B%E7%BB%87%E7%89%A9.jpg?a=true‍

Thanks,
Mike

Re: How to communicate between sevlet and applet ?

zengqingyi12 — Thu, 14 May 2009 09:36:53 GMT

Thank you very much,it works.
Why it should use such a proxy to download the file in alfresco share ?
What's the function is the proxy ?
thanks in advance.

Re: How to communicate between sevlet and applet ?

mikeh — Thu, 14 May 2009 10:54:34 GMT

The Share proxy is used so that the Repository can be firewalled off and Share is the only public point of entry from a web client.

The proxy handles authentication sessions between Share and the Repository, renewing the auth ticket if required.

Thanks,
Mike

Re: How to communicate between sevlet and applet ?

isloat — Tue, 05 Apr 2011 07:40:17 GMT

But how it works?

http://forums.alfresco.com/en/viewtopic.php?f=48&t=38151