HTTP Upload file with Socket

[KlausFriese]

Hi,

I am currently working on scripts that are using the Socket for HTTP-communication with our server, I found many answers to my question by searching in the forum but now I'm stucked with an HTTP upload.

I'm creating a preview of the current pages and I like to upload this preview to the server. On the server a java application is running and I have a java test application to upload files - I know that the upload is working and the problem is in the script.

I'm reading the file into a String and I'm creating a Socket connection to the server. I'm creating another string with the Content I like to upload ( the file and additional informations ) and I'm sending the HTTP POST to the server. And I always get an "stream ended unexpectedly" error from the server.

So I think, the content length is the problem. Server is expecting a number of bytes and I don't send the expected bytes. How do I calculate the content lenght?

This is my code:

                          conn = new Socket;

            reply = "";

            var f = File ( "c:\\tmp\\jdExport.jpg");

            f.encoding = 'BINARY';

            f.open("r");

            var fContent = f.read();

            f.close();

            if( conn.open( "127.0.0.1:8081" , "BINARY" ) ) {

                alert( "connected" );

                conn.timeout=20000;

                content = "--XLuvdG51D_BRiiAda_0y79ImMN_ddtKYzeFFLlu8\n"

                                + "Content-Disposition: form-data; name=\"file\"; filename=\"jdExport.jpg\"\n"

                                + "Content-Type: application/octet-stream\n"

                                + "\n"

                                + fContent;

                                ;

                cs = "POST /dp/uploadpreview?sessionid=xxxx HTTP/1.1\n"

                                + "Content-Length: " + content.length + "\n"

                                + "Content-Type: multipart/form-data; boundary=XLuvdG51D_BRiiAda_0y79ImMN_ddtKYzeFFLlu8\n"

                                + "Host: 127.0.0.1:8081\n"

                                + "Connection: Keep-Alive\n"

                                + "User-Agent: Apache-HttpClient/4.3.1 (java 1.5)\n"

                                +  "Authorization: Basic TXlTUUxcYWRtaW46\n"

                                + "Accept-Encoding: gzip,deflate\n"

                                + "\n"

                                + content;

                var log = File( "c:\\tmp\\log.txt" );

                log.open( "w" );

                log.write( cs );

                log.close();

                conn.write( cs );

                reply = conn.read(999999);

                conn.close();

                alert( reply );

                if( reply.indexOf( "200 OK" ) > 0 ) {

                } else {

                    throw new Error( "createLayout.error: Errormessage from server " + dataplanServer + ":" + getResponseError( reply ) );

                }

            } else {

                throw new Error( "createLayout.error: Can't connect to " + dataplanServer );

            }

[-hans-]

Hi,

did you try passive mode ?

yourSocket.write('PASV\r\n')

response (yourSocket.readln();) should include '227'

[KlausFriese]

Hi,

Thanks, but this didn't work. Server gives me a "400 Bad Request" as response.

[frameexpert]

I am not sure if this will help, but Russ Ward has a bunch of free sample ExtendScript scripts on his website. I am pretty sure there is a socket example. They are oriented toward FrameMaker, but the socket part should be the same regardless of the target product. FrameMaker ExtendScript Samples - West Street Consulting

[Loic.Aigon]

I would also recommend looking at getUrls script from Rorohiko : Rorohiko: GetURLs.jsx - access HTTP content from InDesign ExtendScript

Extendables maybe too ?

[KlausFriese]

Thanks, but the examples have only code with reading data via HTTP Get and that already works fine. The problem is in sending data with file attachements via POST.

I also tried the Extendables library and that doesn't work at all. Doesn't set the boundary and other header settings.

And I made a simple php script for the server side and the POST works with this PHP script. But the same POST doesn't work with our java server application with embedded Tomcat webserver...

[KlausFriese · Accepted solution]

I found it. I downloaded the source files of the spring framework and the apache commons file uploader und used the debugger to find out what happened on server side. The tomcat want's another "--" after the file data (and the closing boundary string) and I had a CRLF at this position. I just added the "--" at the end of the upload and it worked..

[grg79]

HI Klauss

I test your code for uploading by socket binary file... but not works....

Can you load an example of working code to understand where I'm wrong?

[Klaus Friese]

Thanks, but this is already solved.