[help] XmlRpcClient:doConnect error 11004

[qichao zhu]

Hi, all
I am trying to use the xmlrpc++ library in my project. My colleague has used pocketXMLRPC library to build a simple program which as follows:
#include "stdafx.h"
#include <atlbase.h>
extern CComModule _Module;
#include <atlcom.h>
#include "pocketXMLRPC.h"

int main(int argc, char* argv[])
{
    USES_CONVERSION;
    CoInitialize(NULL);
    CComPtr<IXmlRpcFactory> factory;
    HRESULT hr = factory.CoCreateInstance(CLSID_CoFactory);

    if (SUCCEEDED(hr))
    {       
        CComDispatchDriver dispLogin;
        //"https://192.168.1.205:8443/am5/xmlrpc")
        hr = factory->Proxy(A2W("http://192.168.1.44:8088/cgi-bin/xmlrpc.exe"), // url
                            CComBSTR(L"AuthenticationService."),    // method prefix
                            NULL,                                    // server username (for authentication)
                            NULL,                                    // server password (for authentication)
                            NULL,                                    // proxy server name
                            0,                                        // proxy server port
                            NULL,                                    // proxy username
                            NULL,                                    // proxy password
                            30000,                                    // timeout in ms
                            &dispLogin);   

        if (SUCCEEDED(hr))
        {   
           
            CComPtr<IXmlRpcStruct> rpcStruct;                       
            hr = rpcStruct.CoCreateInstance(__uuidof(CoXmlRpcStruct)) ;
            if (SUCCEEDED(hr))
            {                           
                CComVariant paramUser("usoagent"), paramPassword("mypassword"),paramStruct,retVal ;
                CComVariant msg("40153");                       
                paramStruct = rpcStruct;
               
                rpcStruct->put_Value(CComBSTR(L"realmId"), msg);           
               
                VARIANT multiParam[3];
                multiParam[0] = paramStruct;
                multiParam[1] = paramPassword;
                multiParam[2] = paramUser;

                hr = dispLogin.InvokeN(OLESTR("login"),multiParam,3,&retVal ) ;       

...
...

Here the URL address for server side is "http://192.168.1.44:8088/cgi-bin/xmlrpc.exe" which is an executable in the remoter pc.

So I rewrite the program with XmlRpc++ 0.7 as follows:
#include "stdafx.h"
#include "XmlRpc.h"
#include <iostream>

using namespace XmlRpc;

int main(int argc, char* argv[])
{
    XmlRpcValue noArgs, result;
    XmlRpcValue paramStruct;
    XmlRpcClient c("http://192.168.1.44/cgi-bin/xmlrpc.exe", 8088);
   

    paramStruct["realmId"] = "40153";
    noArgs[0] = paramStruct;
    noArgs[1] = "usoagent";
    noArgs[2] = "mypassword";

    if (c.execute("AuthenticationService.login", noArgs, result))
    {
        std::cout << "RPC OK!\n";
    }
    else
    {
        std::cout << "Error calling 'AuthenticationService.login'\n\n";
    }
    return 0;
}
But its execution will prompt error as:
Error in XmlRpcClient::doConnect: Could not connect to server <error 11004>.
I google the error 11004 and find it is a WinSock error: WSANO_DATA (11004) Valid name, no data record of requested type.

So does it mean that http://192.168.1.44/cgi-bin/xmlrpc.exe is not a valid URL address for XmlRpcClient? How can I solve this problem?
Thanks a lot.

[Chris Morley]

Take a look at the XmlRpcClient constructor documentation:

    //! Construct a client to connect to the server at the specified host:port address
    //!  @param host The name of the remote machine hosting the server, eg "myserver.mycompany.com"
    //!  @param port The port on the remote machine where the server is listening
    //!  @param uri  An optional string to be sent as the URI in the HTTP GET header
    //! Note that the host is not a URL, do not prepend "http://" or other protocol specifiers.
    XmlRpcClient(const char* host, int port, const char* uri=0);

So you might want something like this:

XmlRpcClient c("192.168.1.44", 8088, "/cgi-bin/xmlrpc.exe");

Yes it should probably handle URLs in the ctor.  Some one that needs that feature can add it some time.

[qichao zhu]

Thanks Chris,
the connection problem has been solved as your advice.
Now I can get the response from server but there is some problem when reading the header.

In the function:
// Read the header from the response
bool
XmlRpcClient::readHeader()
{
...
...
  char *hp = (char*)_header.c_str();  // Start of header
  char *ep = hp + _header.length();   // End of string
  char *bp = 0;                       // Start of body
  char *lp = 0;                       // Start of content-length value

  for (char *cp = hp; (bp == 0) && (cp < ep); ++cp) {
    if ((ep - cp > 16) && (strncasecmp(cp, "Content-length: ", 16) == 0))
      lp = cp + 16;
    else if ((ep - cp > 4) && (strncmp(cp, "\r\n\r\n", 4) == 0))
      bp = cp + 4;
    else if ((ep - cp > 2) && (strncmp(cp, "\n\n", 2) == 0))
      bp = cp + 2;
  }

  // If we haven't gotten the entire header yet, return (keep reading)
  if (bp == 0) {
    if (_eof)          // EOF in the middle of a response is an error
    {
      XmlRpcUtil::error("Error in XmlRpcClient::readHeader: EOF while reading header");
      return false;   // Close the connection
    }
   
    return true;  // Keep reading
  }

  // Decode content length
  if (lp == 0) {
    XmlRpcUtil::error("Error XmlRpcClient::readHeader: No Content-length specified");
    return false;   // We could try to figure it out by parsing as we read, but for now...
  }

...
...
}

Here 
// Decode content length
  if (lp == 0) {
    XmlRpcUtil::error("Error XmlRpcClient::readHeader: No Content-length specified");
    return false;   // We could try to figure it out by parsing as we read, but for now...
  }
I check the xml content and it only defines "Content-Type" string but no such "Content-Length" string.
Now it seems I have to parse the message myself. My worry is if the reading header will accept all response without truncating something that exceeds some buffer size limit.

Thanks a lot.