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/*
* libnet++
*
* Copyright (C) 2007-2013 Joachim Wilke <libnet@joachim-wilke.de>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include "HttpClient.h"
#include <boost/asio.hpp>
#include <boost/algorithm/string.hpp>
#include <liblog++/Log.h>
#include <libconv++/CharsetConverter.h>
namespace network {
HttpClient::HttpClient(const std::string &host, int port)
: TcpClient{host, port} {
}
HttpClient::~HttpClient() {
}
HttpClient::response_t HttpClient::parseResponse() {
header_t header;
body_t body;
std::string http_version;
*stream >> http_version;
unsigned int status_code;
*stream >> status_code;
std::string status_message;
std::getline(*stream, status_message);
if (!(*stream) || http_version.substr(0, 5) != "HTTP/")
throw std::runtime_error("Invalid response");
DBG("HTTP status code " << status_code);
// Process the response headers, which are terminated by a blank line
std::string headerline;
while (std::getline(*stream, headerline) && headerline != "\r") {
size_t separator = headerline.find(':');
if (separator == std::string::npos)
throw std::runtime_error("Invalid header format detected in HTTP response.");
std::string key = headerline.substr(0, separator);
std::string value = headerline.substr(separator+2);
header.insert(std::pair<std::string, std::string>(key, value));
DBG("Found header: " << key << ": " << value);
}
// The remaining data is the body
std::stringstream bodystream;
bodystream << stream->rdbuf();
body = bodystream.str();
DBG("Body size " << body.length() << " Bytes.");
// check encoding and convert
const std::string charsetToken = "charset=";
const std::string& contentType = header["Content-Type"];
if (contentType.length()) {
size_t start = contentType.find(charsetToken);
if (start != std::string::npos) {
start += charsetToken.length();
size_t stop = contentType.find('\r', start);
if (stop == std::string::npos)
stop = contentType.find('\n', start);
std::string charset = std::string(contentType, start, stop-start);
DBG("Converting response from charset " << charset << " to local encoding.");
body = convert::CharsetConverter::ConvertToLocalEncoding(body, charset);
}
}
return response_t(header, body);
}
std::string HttpClient::sendRequest(const std::string &request, const std::ostream &postdata, const header_t &header) {
if (!connected)
connectStream();
std::stringstream post;
post << postdata.rdbuf();
int postContentLength = post.str().length();
std::string method = postContentLength ? "POST" : "GET";
DBG("Requesting HTTP " << method << " on " << request);
*stream << method << " " << request << " HTTP/1.0\r\n";
for (auto entry : defaultHeader) {
*stream << entry.first << ": " << entry.second << "\r\n";
}
for (auto entry : header) {
*stream << entry.first << ": " << entry.second << "\r\n";
}
if (postContentLength)
*stream << "Content-Length: " << postContentLength << "\r\n"
<< "\r\n" << post.str() << "\r\n" << std::flush;
else
*stream << "\r\n" << std::flush;
response_t response = parseResponse();
disconnectStream();
// check for redirection
header_t responseHeader = response.first;
if (responseHeader["Location"].length() > 0) {
DBG("Redirect requested to " << responseHeader["Location"]);
return getURL(responseHeader["Location"]);
}
return response.second;
}
std::string HttpClient::get(const std::string& url, const param_t ¶ms, const header_t &header) {
std::stringstream ss;
if (url.find('?') == std::string::npos)
ss << url << "?";
else
ss << url << "&";
for (auto parameter: params)
ss << parameter.first << "=" << parameter.second << "&";
return sendRequest(ss.str(), std::ostringstream(), header);
}
std::string HttpClient::post(const std::string &request, const param_t &postdata, const header_t &header) {
header_t fullheader = {
{ "Content-Type", "application/x-www-form-urlencoded" }
};
fullheader.insert(begin(header), end(header));
std::stringstream ss;
for (auto parameter : postdata)
ss << parameter.first << "=" << parameter.second << "&";
return sendRequest(request, ss, fullheader);
}
std::string HttpClient::getURL(const std::string &url, const header_t &header) {
//TODO support other port
//TODO support HTTPS
size_t protoMarker = url.find("://");
size_t hostMarker = url.find("/", protoMarker+4);
if (protoMarker == std::string::npos || hostMarker == std::string::npos)
throw std::runtime_error("Invalid url.");
std::string proto = url.substr(0, protoMarker);
std::string host = url.substr(protoMarker+3, hostMarker-protoMarker-3);
std::string request = url.substr(hostMarker);
if (proto.compare("http") != 0)
throw std::runtime_error("Invalid protocol in url.");
HttpClient client(host);
return client.get(request, param_t(), header);
}
std::string HttpClient::postMIME(const std::string &request, const param_t &postdata, const header_t &header) {
const std::string boundary = "----FormBoundaryZMsGfL5JxTz5LuAW";
header_t fullheader = {
{ "Content-Type", "multipart/form-data; boundary=" + boundary }
};
fullheader.insert(begin(header), end(header));
std::stringstream ss;
for (auto parameter : postdata) {
ss << "--" << boundary << "\r\n"
<< "Content-Disposition: form-data; name=\""+parameter.first+"\"\r\n"
<< "\r\n"
<< parameter.second
<< "\r\n";
}
ss << "--" << boundary << "--\r\n";
return sendRequest(request, ss, fullheader);
}
}
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