[oXygen-user] HttpUrlConnection and HTTP method in a Saxon extension

[Florent Georges]

  Dan,

  Thanks for this detailed sample.  I enabled the log categories as in
your email, and I can see my request is indeed a GET.  I tried your
sample and I get a POST with it.  So it seems the problem is in my
code.

  BTW, if I use getRequestMethod() on the connection in your example
(after the setRequestMethod call), I get GET, but from the logs POST
seems to be used instead.

  I was not able to create a simple example, but I can package a little
subset of the relevant sources if I can send them privately.

  Regards,

-- 
Florent Georges
http://www.fgeorges.org/


Dan Caprioara wrote:

> Oxygen uses the Apache  http client to read/write from WebDAV HTTP 
> servers.  For this,  a new implementation of the HTTPURLConnection
> wraps 
> the Apache http client. Normally, the PUT method is used for storing 
> data on the servers  and GET to retrieve it, but the POST method is
> also 
> supported.
> 
> This is how I tried to reproduce your problem, but without success:
> 
> First of all, I have enabled the http logging. For this, I have
> created 
> a log4j.properties file in the oXygen installation directory, with
> the 
> following content:
> 
> log4j.rootCategory= info, R
> log4j.category.org.apache.commons=debug
> log4j.category.httpclient=debug
> # R is the standard output
> log4j.appender.R=org.apache.log4j.ConsoleAppender
> log4j.appender.R.layout=org.apache.log4j.PatternLayout
> log4j.appender.R.layout.ConversionPattern=%r %p [ %t ] %c - %m%n
> 
> I have then started oXygen using the startup scripts available in the
> 
> installation directory.
> 
> I have compiled the following java class, and added it as an
> extension 
> to the transformation scenario. I have then tested with both Saxon B
> and 
> Saxon 6.5:
> 
> import java.io.InputStream;
> import java.io.OutputStream;
> import java.net.HttpURLConnection;
> import java.net.URL;
> 
> public class SaxonExtension {
> 
>   public static String post() {
>     try {
>       URL url = new URL("http://www.sync.ro/");
>       HttpURLConnection conn =
> (HttpURLConnection)url.openConnection();
>       conn.setRequestMethod("POST");
>       conn.connect();
>       OutputStream os = conn.getOutputStream();
>       os.write("some_parameter".getBytes());
>       os.close();
>       InputStream is = conn.getInputStream();
>       int r = is.read();
>       StringBuffer buf = new StringBuffer();
>       while(r != -1) {
>         buf.append((char)r);
>         r = is.read();
>       }
>       is.close();
>       return buf.toString();
>     } catch (Exception e) {
>       return e.toString();
>     }      
>   }
> }
> 
> 
> The following lines were written in the log:
> 
>   - >> "POST http://www.sync.ro/ HTTP/1.1[\r][\n]"
>   - >> "User-Agent: Jakarta Commons-HttpClient/3.1[\r][\n]"
>   - >> "Host: www.sync.ro[\r][\n]"
>   - >> "Proxy-Connection: Keep-Alive[\r][\n]"
>   - >> "Content-Length: 6[\r][\n]"
>   - >> "[\r][\n]"
>   - >> "some_parameter"
> 
> 
> Please send to support the log you obtain and eventually a Java
> sample 
> showing the problem.
>  
> As a workaround, you could create directly a 
> sun.net.www.protocol.http.HttpURLConnection object.
> 
> Happy New Year!
> Dan Caprioara
> 
> 
> 
> Florent Georges wrote:
> >   Hi,
> >
> >   Best wishes to the oXygen team and users.
> >
> >   I have a Saxon extension in Java, that opens an HTTP connection
> from
> > a URL and set the HTTP method on it to POST:
> >
> >     URL url  = ...;
> >     HttpURLConnection conn = (HttpURLConnection)
> url.openConnection();
> >     conn.setRequestMethod("POST");
> >
> >   Unfortunately, the method is always GET, and there is no
> exception
> > raised in that code.  I must admit it took a while to find the
> cause.
> > The code works well outside oXygen, and the object 'conn' is
> actually
> > of type ro.sync.net.protocol.http.WebdavHttpURLConnection when the
> > transform is launched from within oXygen.
> >
> >   Is it because of a bug in this class?  Is there any way to work
> > around this one?  Outside of oXygen, in a standalone Sun JVM, the
> > class is sun.net.www.protocol.http.HttpURLConnection, for what is
> > worth noting...
> >
> >   Un an nou fericit!
> >
> >   
>