XmlRpcHttpTransportException (apache xmlrpc client, xmlrpc-c C++ server)

[Arne Kalaghan]

Hello,
I have problems connecting an apache java xml-rpc client with a xmlrpc-c C++ xml-rpc server (system is ubuntu linux 8.04).

The client code is modified from the first example at http://www.wordtracker.com/docs/api/ch03s02.html.

The server code is http://xmlrpc-c.svn.sourceforge.net/viewvc/xmlrpc-c/trunk/examples/cpp/xmlrpc_sample_add_server.cpp?revision=1083&view=markup

When running the client (after server is started) I get:
Exception
in thread "main" org.apache.xmlrpc.client.XmlRpcHttpTransportException:
HTTP server returned unexpected status: Not Found
    at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.getInputStream(XmlRpcSunHttpTransport.java:94)
    at org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:152)
    at org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:115)
    at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:69)
    at org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:56)
    at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)
    at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)
    at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)
    at test.apachexmlrpc.Client.main(Client.java:9)

The
java client can communicate with a server from the same apache package,
and the C++ server can communicate with a C++ client from the same
xmlrpc-c package. What can be the reason for the incompatibilities
between java and C++?

Here are the sources for completeness:

Java client Client.java:
================

import org.apache.xmlrpc.XmlRpcClient;
import java.util.Vector;
public class Client {
    public static void main( String args[] ) throws Exception {
        XmlRpcClient client = new XmlRpcClient( "http://localhost:8080/" );
        Vector params = new Vector();
        params.addElement( 5 );
        params.addElement( 7 );
        Object result = client.execute( "sample.add", params );
        if ( result != null )
            System.out.println( "Successfully pinged guest account." );
    }
}

C++ server xmlrpc_sample_add_server.cpp:
================================
#include <cassert>
#include <stdexcept>
#include <iostream>
#ifdef WIN32
#  include <windows.h>
#else
#  include <unistd.h>
#endif

#include <xmlrpc-c/base.hpp>
#include <xmlrpc-c/registry.hpp>
#include <xmlrpc-c/server_abyss.hpp>

using namespace std;

#ifdef WIN32
  #define SLEEP(seconds) SleepEx(seconds * 1000);
#else
  #define SLEEP(seconds) sleep(seconds);
#endif


class sampleAddMethod : public xmlrpc_c::method {
public:
    sampleAddMethod() {
        // signature and help strings are documentation -- the client
        // can query this information with a system.methodSignature and
        // system.methodHelp RPC.
        this->_signature = "i:ii";
            // method's result and two arguments are integers
        this->_help = "This method adds two integers together";
    }
    void
    execute(xmlrpc_c::paramList const& paramList,
            xmlrpc_c::value *   const  retvalP) {

        int const addend(paramList.getInt(0));
        int const adder(paramList.getInt(1));

        paramList.verifyEnd(2);

        *retvalP = xmlrpc_c::value_int(addend + adder);

        // Sometimes, make it look hard (so client can see what it's like
        // to do an RPC that takes a while).
        if (adder == 1)
            SLEEP(2);
    }
};



int
main(int           const,
     const char ** const) {

    try {
        xmlrpc_c::registry myRegistry;

        xmlrpc_c::methodPtr const sampleAddMethodP(new sampleAddMethod);

        myRegistry.addMethod("sample.add", sampleAddMethodP);

        xmlrpc_c::serverAbyss myAbyssServer(
            myRegistry,
            8080,              // TCP port on which to listen
            "/tmp/xmlrpc_log"  // Log file
            );

        myAbyssServer.run();
        // xmlrpc_c::serverAbyss.run() never returns
        assert(false);
    } catch (exception const& e) {
        cerr << "Something failed.  " << e.what() << endl;
    }
    return 0;
}

Kind regards,
A. Kalaghan


     

[Lars Schnoor]

Hi
I am not sure if I can come with any useful for you, but I would try
changing the argument to you function call from Vector to Object[]. My
server runs Apaches XML-RPC and I have managed to use it with both
xml-rpc for c and for c++.

Lars

Arne Kalaghan wrote:

> Hello,
> I have problems connecting an apache java xml-rpc client with a xmlrpc-c C++ xml-rpc server (system is ubuntu linux 8.04).
>
> The client code is modified from the first example at http://www.wordtracker.com/docs/api/ch03s02.html.
>
> The server code is http://xmlrpc-c.svn.sourceforge.net/viewvc/xmlrpc-c/trunk/examples/cpp/xmlrpc_sample_add_server.cpp?revision=1083&view=markup
>
> When running the client (after server is started) I get:
> Exception
> in thread "main" org.apache.xmlrpc.client.XmlRpcHttpTransportException:
> HTTP server returned unexpected status: Not Found
>     at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.getInputStream(XmlRpcSunHttpTransport.java:94)
>     at org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:152)
>     at org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:115)
>     at org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:69)
>     at org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:56)
>     at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)
>     at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)
>     at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)
>     at test.apachexmlrpc.Client.main(Client.java:9)
>
> The
> java client can communicate with a server from the same apache package,
> and the C++ server can communicate with a C++ client from the same
> xmlrpc-c package. What can be the reason for the incompatibilities
> between java and C++?
>
> Here are the sources for completeness:
>
> Java client Client.java:
> ================
>
> import org.apache.xmlrpc.XmlRpcClient;
> import java.util.Vector;
> public class Client {
>     public static void main( String args[] ) throws Exception {
>         XmlRpcClient client = new XmlRpcClient( "http://localhost:8080/" );
>         Vector params = new Vector();
>         params.addElement( 5 );
>         params.addElement( 7 );
>         Object result = client.execute( "sample.add", params );
>         if ( result != null )
>             System.out.println( "Successfully pinged guest account." );
>     }
> }
>
> C++ server xmlrpc_sample_add_server.cpp:
> ================================
> #include <cassert>
> #include <stdexcept>
> #include <iostream>
> #ifdef WIN32
> #  include <windows.h>
> #else
> #  include <unistd.h>
> #endif
>
> #include <xmlrpc-c/base.hpp>
> #include <xmlrpc-c/registry.hpp>
> #include <xmlrpc-c/server_abyss.hpp>
>
> using namespace std;
>
> #ifdef WIN32
>   #define SLEEP(seconds) SleepEx(seconds * 1000);
> #else
>   #define SLEEP(seconds) sleep(seconds);
> #endif
>
>
> class sampleAddMethod : public xmlrpc_c::method {
> public:
>     sampleAddMethod() {
>         // signature and help strings are documentation -- the client
>         // can query this information with a system.methodSignature and
>         // system.methodHelp RPC.
>         this->_signature = "i:ii";
>             // method's result and two arguments are integers
>         this->_help = "This method adds two integers together";
>     }
>     void
>     execute(xmlrpc_c::paramList const& paramList,
>             xmlrpc_c::value *   const  retvalP) {
>
>         int const addend(paramList.getInt(0));
>         int const adder(paramList.getInt(1));
>
>         paramList.verifyEnd(2);
>
>         *retvalP = xmlrpc_c::value_int(addend + adder);
>
>         // Sometimes, make it look hard (so client can see what it's like
>         // to do an RPC that takes a while).
>         if (adder == 1)
>             SLEEP(2);
>     }
> };
>
>
>
> int
> main(int           const,
>      const char ** const) {
>
>     try {
>         xmlrpc_c::registry myRegistry;
>
>         xmlrpc_c::methodPtr const sampleAddMethodP(new sampleAddMethod);
>
>         myRegistry.addMethod("sample.add", sampleAddMethodP);
>
>         xmlrpc_c::serverAbyss myAbyssServer(
>             myRegistry,
>             8080,              // TCP port on which to listen
>             "/tmp/xmlrpc_log"  // Log file
>             );
>
>         myAbyssServer.run();
>         // xmlrpc_c::serverAbyss.run() never returns
>         assert(false);
>     } catch (exception const& e) {
>         cerr << "Something failed.  " << e.what() << endl;
>     }
>     return 0;
> }
>
> Kind regards,
> A. Kalaghan
>
>
>      
>  

[Stanislav Miklik]

Hi,

I am not sure, but to me it looks like the problem on HTTP level (guess
404). Also I would try to capture the good case (with C++ client) and the
bad case (Java) with Wireshark / snoop and compare the HTTP request.
However it looks strange, but I would guess some different interpretation of
"sample.add"

Regards
Stano

On Sun, Jul 12, 2009 at 18:31, Lars Schnoor <Lars.Schnoor@...> wrote:

> Hi
> I am not sure if I can come with any useful for you, but I would try
> changing the argument to you function call from Vector to Object[]. My
> server runs Apaches XML-RPC and I have managed to use it with both xml-rpc
> for c and for c++.
>
> Lars
>
>
> Arne Kalaghan wrote:
>
>> Hello,
>> I have problems connecting an apache java xml-rpc client with a xmlrpc-c
>> C++ xml-rpc server (system is ubuntu linux 8.04).
>>
>> The client code is modified from the first example at
>> http://www.wordtracker.com/docs/api/ch03s02.html.
>>
>> The server code is
>> http://xmlrpc-c.svn.sourceforge.net/viewvc/xmlrpc-c/trunk/examples/cpp/xmlrpc_sample_add_server.cpp?revision=1083&view=markup
>>
>> When running the client (after server is started) I get:
>> Exception
>> in thread "main" org.apache.xmlrpc.client.XmlRpcHttpTransportException:
>> HTTP server returned unexpected status: Not Found
>>    at
>> org.apache.xmlrpc.client.XmlRpcSunHttpTransport.getInputStream(XmlRpcSunHttpTransport.java:94)
>>    at
>> org.apache.xmlrpc.client.XmlRpcStreamTransport.sendRequest(XmlRpcStreamTransport.java:152)
>>    at
>> org.apache.xmlrpc.client.XmlRpcHttpTransport.sendRequest(XmlRpcHttpTransport.java:115)
>>    at
>> org.apache.xmlrpc.client.XmlRpcSunHttpTransport.sendRequest(XmlRpcSunHttpTransport.java:69)
>>    at
>> org.apache.xmlrpc.client.XmlRpcClientWorker.execute(XmlRpcClientWorker.java:56)
>>    at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:167)
>>    at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:158)
>>    at org.apache.xmlrpc.client.XmlRpcClient.execute(XmlRpcClient.java:147)
>>    at test.apachexmlrpc.Client.main(Client.java:9)
>>
>> The
>> java client can communicate with a server from the same apache package,
>> and the C++ server can communicate with a C++ client from the same
>> xmlrpc-c package. What can be the reason for the incompatibilities
>> between java and C++?
>>
>> Here are the sources for completeness:
>>
>> Java client Client.java:
>> ================
>>
>> import org.apache.xmlrpc.XmlRpcClient;
>> import java.util.Vector;
>> public class Client {
>>    public static void main( String args[] ) throws Exception {
>>        XmlRpcClient client = new XmlRpcClient( "http://localhost:8080/"
>> );
>>        Vector params = new Vector();
>>        params.addElement( 5 );
>>        params.addElement( 7 );
>>        Object result = client.execute( "sample.add", params );
>>        if ( result != null )
>>            System.out.println( "Successfully pinged guest account." );
>>    }
>> }
>>
>> C++ server xmlrpc_sample_add_server.cpp:
>> ================================
>> #include <cassert>
>> #include <stdexcept>
>> #include <iostream>
>> #ifdef WIN32
>> #  include <windows.h>
>> #else
>> #  include <unistd.h>
>> #endif
>>
>> #include <xmlrpc-c/base.hpp>
>> #include <xmlrpc-c/registry.hpp>
>> #include <xmlrpc-c/server_abyss.hpp>
>>
>> using namespace std;
>>
>> #ifdef WIN32
>>  #define SLEEP(seconds) SleepEx(seconds * 1000);
>> #else
>>  #define SLEEP(seconds) sleep(seconds);
>> #endif
>>
>>
>> class sampleAddMethod : public xmlrpc_c::method {
>> public:
>>    sampleAddMethod() {
>>        // signature and help strings are documentation -- the client
>>        // can query this information with a system.methodSignature and
>>        // system.methodHelp RPC.
>>        this->_signature = "i:ii";
>>            // method's result and two arguments are integers
>>        this->_help = "This method adds two integers together";
>>    }
>>    void
>>    execute(xmlrpc_c::paramList const& paramList,
>>            xmlrpc_c::value *   const  retvalP) {
>>
>>        int const addend(paramList.getInt(0));
>>        int const adder(paramList.getInt(1));
>>
>>        paramList.verifyEnd(2);
>>
>>        *retvalP = xmlrpc_c::value_int(addend + adder);
>>
>>        // Sometimes, make it look hard (so client can see what it's like
>>        // to do an RPC that takes a while).
>>        if (adder == 1)
>>            SLEEP(2);
>>    }
>> };
>>
>>
>>
>> int main(int           const,     const char ** const) {
>>
>>    try {
>>        xmlrpc_c::registry myRegistry;
>>
>>        xmlrpc_c::methodPtr const sampleAddMethodP(new sampleAddMethod);
>>
>>        myRegistry.addMethod("sample.add", sampleAddMethodP);
>>
>>        xmlrpc_c::serverAbyss myAbyssServer(
>>            myRegistry,
>>            8080,              // TCP port on which to listen
>>            "/tmp/xmlrpc_log"  // Log file
>>            );
>>
>>        myAbyssServer.run();
>>        // xmlrpc_c::serverAbyss.run() never returns
>>        assert(false);
>>    } catch (exception const& e) {
>>        cerr << "Something failed.  " << e.what() << endl;
>>    }
>>    return 0;
>> }
>>
>> Kind regards,
>> A. Kalaghan
>>
>>
>>
>>
>