Hendrik Lipka / SimpleWebService

A simple web service over HTTP library. Calls a HTTP server via GET, and returns the response wrapped in a XML parser. All calls are synchronous. Needs the NetServicesMin, DNSResolver, TcpLineStream and spxml libraries. The code for URL handling has been copied directly from the original NetServices library (Thanks to Donatien!).

webservice.cpp

Committer:
hlipka
Date:
2011-01-29
Revision:
1:62e112d14c8f
Parent:
0:5e8527b638e1
Child:
2:687430e7f63a

File content as of revision 1:62e112d14c8f:

#include "Timer.h"

#include "webservice.h"

#include "spxmlnode.hpp"
#include "spxmlhandle.hpp"

WebService::WebService(const char* urlStr) {
    Url *url=new Url();
    url->fromString(urlStr);
    
//    printf("host name from URL=%s\n",url->getHost().c_str());

    _stream=new TCPLineStream(url->getHost().c_str(),0==url->getPort()?80:url->getPort(),"\r\n");
    delete url;

    _request=string("GET ").append(urlStr).append(" HTTP/1.0\r\n");
//    printf("request=[%s]\n",_request.c_str());
}

SP_XmlDomParser* WebService::callService() {
    if (!_stream->open())
        return NULL;

//    printf("send request[%s]\n",request.c_str());
    _stream->sendLine(_request);

    string firstLine=_stream->readLine();
    // todo: parse for HTTP response
    // response must be for HTTP/1.0, and be 200
    if (0!=firstLine.compare("HTTP/1.0 200 OK")) {
        printf("call not sucessfull, response=%s\n",firstLine.c_str());
        return NULL;
    }
    // skip headers
    while (true) {
        string line=_stream->readLine();
//        printf("header=[%s]\n",line.c_str());
        if (0==line.length())
            break;
    }
    SP_XmlDomParser *parser=new SP_XmlDomParser();
    while (true) {
        string line=_stream->readLine(1500);
//        printf("content=[%s]\n",line.c_str());
        parser->append(line.c_str(),line.length());
        if (0==line.length())
            break;
    }
    _stream->close();
    return parser;
}

void WebService::close() {
    if (NULL!=_stream) {
        _stream->close();
        delete _stream;
        _stream=NULL;
    }
}