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136 lines
4.2 KiB
C++
136 lines
4.2 KiB
C++
//
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// Twitter.cpp
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//
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// $Id: //poco/1.4/Net/samples/TwitterClient/src/Twitter.cpp#1 $
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//
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// A C++ implementation of a Twitter client based on the POCO Net library.
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//
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// Copyright (c) 2009, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//
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#include "Twitter.h"
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#include "Poco/Net/HTTPClientSession.h"
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#include "Poco/Net/HTTPRequest.h"
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#include "Poco/Net/HTTPResponse.h"
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#include "Poco/Net/HTTPBasicCredentials.h"
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#include "Poco/DOM/DOMParser.h"
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#include "Poco/DOM/NodeList.h"
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#include "Poco/SAX/InputSource.h"
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#include "Poco/URI.h"
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#include "Poco/NumberParser.h"
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const std::string Twitter::TWITTER_URI("http://twitter.com/statuses/");
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Twitter::Twitter():
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_uri(TWITTER_URI)
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{
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}
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Twitter::Twitter(const std::string& twitterURI):
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_uri(twitterURI)
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{
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}
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Twitter::~Twitter()
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{
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}
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void Twitter::login(const std::string& username, const std::string& password)
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{
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_username = username;
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_password = password;
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}
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Poco::Int64 Twitter::update(const std::string& status)
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{
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Poco::Net::HTMLForm form;
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form.set("status", status);
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Poco::AutoPtr<Poco::XML::Document> pResult = invoke(Poco::Net::HTTPRequest::HTTP_POST, "update", form);
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Poco::AutoPtr<Poco::XML::NodeList> pList = pResult->getElementsByTagName("id");
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if (pList->length() > 0)
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{
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return Poco::NumberParser::parse64(pList->item(0)->innerText());
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}
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else return 0;
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}
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Poco::AutoPtr<Poco::XML::Document> Twitter::invoke(const std::string& httpMethod, const std::string& twitterMethod, Poco::Net::HTMLForm& form)
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{
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// Create the request URI.
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// We use the XML version of the Twitter API.
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Poco::URI uri(_uri + twitterMethod + ".xml");
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std::string path(uri.getPath());
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Poco::Net::HTTPClientSession session(uri.getHost(), uri.getPort());
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Poco::Net::HTTPRequest req(httpMethod, path, Poco::Net::HTTPMessage::HTTP_1_1);
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// Add username and password (HTTP basic authentication) to the request.
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Poco::Net::HTTPBasicCredentials cred(_username, _password);
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cred.authenticate(req);
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// Send the request.
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form.prepareSubmit(req);
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std::ostream& ostr = session.sendRequest(req);
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form.write(ostr);
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// Receive the response.
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Poco::Net::HTTPResponse res;
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std::istream& rs = session.receiveResponse(res);
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// Create a DOM document from the response.
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Poco::XML::DOMParser parser;
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parser.setFeature(Poco::XML::DOMParser::FEATURE_FILTER_WHITESPACE, true);
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parser.setFeature(Poco::XML::XMLReader::FEATURE_NAMESPACES, false);
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Poco::XML::InputSource source(rs);
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Poco::AutoPtr<Poco::XML::Document> pDoc = parser.parse(&source);
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// If everything went fine, return the XML document.
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// Otherwise look for an error message in the XML document.
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if (res.getStatus() == Poco::Net::HTTPResponse::HTTP_OK)
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{
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return pDoc;
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}
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else
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{
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std::string error(res.getReason());
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Poco::AutoPtr<Poco::XML::NodeList> pList = pDoc->getElementsByTagName("error");
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if (pList->length() > 0)
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{
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error += ": ";
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error += pList->item(0)->innerText();
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}
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throw Poco::ApplicationException("Twitter Error", error);
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}
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}
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