Re: Webobjects WebServices - howto stream large Binary Objects

WebObjects uses Apache Axis for WebServices. It looks like SOAP with  
attachments is the way to g . Here's an article that may help (http:// 
www.devx.com/ibm/Article/20254). It looks like some work will need to  
be done on the client side to retrieve the attachment. From the  
article "Note that Listing 3 makes it clear that the attachment is  
outside of the XML message! This is necessary for efficiency." This  
looks interesting. Good luck. If you get it working and you want to,  
post some sample code back :)

Marc

On Mar 28, 2006, at 9:10 AM, Kristof Cossement wrote:

> I want to use webobjects for creating webservices to send large  
> binary files (eg a zipfile of 200Mb)
>
> This works for small data objects (like a jpg of 50kB)
> The problem is the data is not getting streamed, but the entire  
> file is being read in memory, which causes stack overflows.
>
> Could someone give me a hint on how I can communicate through  
> webservices with large binary data objects?
>
> This is an extract of the code I use:
>
> WebService Consumer (Project 1)
> ============================
>
> 	FileInputStream is = new FileInputStream("/path/to/file");
>
> 	NSData d = new NSData(is,1024);	 // CRASHES HERE !!!
> 		
> 	Object [] params = new Object[1];
> 	params[0] = d;
> 	
> 	WOWebServiceClient client = new WOWebServiceClient();
> 	// extra initialisation here
> 	
> 	Object result = client.invoke("FileUpload", "upload", params);
>
>
>
>
> This is the WebService (Project 2)
> ================================
> // I create a routine with an "NSData" parameter and register it as  
> a webservice
>
> WOWebServiceRegistrar.registerWebService(FileUpload.class, true);
>
>
> import java.io.*;
> import com.webobjects.foundation.*;
>
> public class FileUpload {
> public static boolean upload(NSData d) {
> 			
> 		//OutputStream stream
> 		try {
> 			FileOutputStream fileOutputStream = new FileOutputStream("/tmp/ 
> file");
> 			d.writeToStream(fileOutputStream);
> 			fileOutputStream.close();
> 		}
> 		catch (IOException exception) {
> 			// Do something with the exception
> 		}
>
> 	 return true;
> 	}
> }
>
>
>
>
>
>
>
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