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////////////////////////////////////////////////////////////
//
// SFML - Simple and Fast Multimedia Library
// Copyright (C) 2007-2017 Laurent Gomila (laurent@sfml-dev.org)
//
// This software is provided 'as-is', without any express or implied warranty.
// In no event will the authors be held liable for any damages arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it freely,
// subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented;
// you must not claim that you wrote the original software.
// If you use this software in a product, an acknowledgment
// in the product documentation would be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such,
// and must not be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source distribution.
//
////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////
// Headers
////////////////////////////////////////////////////////////
#include <SFML/Network/Http.hpp>
#include <SFML/System/Err.hpp>
#include <cctype>
#include <algorithm>
#include <iterator>
#include <sstream>
#include <limits>
namespace
{
// Convert a string to lower case
std::string toLower(std::string str)
{
for (std::string::iterator i = str.begin(); i != str.end(); ++i)
*i = static_cast<char>(std::tolower(*i));
return str;
}
}
namespace sf
{
////////////////////////////////////////////////////////////
Http::Request::Request(const std::string& uri, Method method, const std::string& body)
{
setMethod(method);
setUri(uri);
setHttpVersion(1, 0);
setBody(body);
}
////////////////////////////////////////////////////////////
void Http::Request::setField(const std::string& field, const std::string& value)
{
m_fields[toLower(field)] = value;
}
////////////////////////////////////////////////////////////
void Http::Request::setMethod(Http::Request::Method method)
{
m_method = method;
}
////////////////////////////////////////////////////////////
void Http::Request::setUri(const std::string& uri)
{
m_uri = uri;
// Make sure it starts with a '/'
if (m_uri.empty() || (m_uri[0] != '/'))
m_uri.insert(0, "/");
}
////////////////////////////////////////////////////////////
void Http::Request::setHttpVersion(unsigned int major, unsigned int minor)
{
m_majorVersion = major;
m_minorVersion = minor;
}
////////////////////////////////////////////////////////////
void Http::Request::setBody(const std::string& body)
{
m_body = body;
}
////////////////////////////////////////////////////////////
std::string Http::Request::prepare() const
{
std::ostringstream out;
// Convert the method to its string representation
std::string method;
switch (m_method)
{
case Get: method = "GET"; break;
case Post: method = "POST"; break;
case Head: method = "HEAD"; break;
case Put: method = "PUT"; break;
case Delete: method = "DELETE"; break;
}
// Write the first line containing the request type
out << method << " " << m_uri << " ";
out << "HTTP/" << m_majorVersion << "." << m_minorVersion << "\r\n";
// Write fields
for (FieldTable::const_iterator i = m_fields.begin(); i != m_fields.end(); ++i)
{
out << i->first << ": " << i->second << "\r\n";
}
// Use an extra \r\n to separate the header from the body
out << "\r\n";
// Add the body
out << m_body;
return out.str();
}
////////////////////////////////////////////////////////////
bool Http::Request::hasField(const std::string& field) const
{
return m_fields.find(toLower(field)) != m_fields.end();
}
////////////////////////////////////////////////////////////
Http::Response::Response() :
m_status (ConnectionFailed),
m_majorVersion(0),
m_minorVersion(0)
{
}
////////////////////////////////////////////////////////////
const std::string& Http::Response::getField(const std::string& field) const
{
FieldTable::const_iterator it = m_fields.find(toLower(field));
if (it != m_fields.end())
{
return it->second;
}
else
{
static const std::string empty = "";
return empty;
}
}
////////////////////////////////////////////////////////////
Http::Response::Status Http::Response::getStatus() const
{
return m_status;
}
////////////////////////////////////////////////////////////
unsigned int Http::Response::getMajorHttpVersion() const
{
return m_majorVersion;
}
////////////////////////////////////////////////////////////
unsigned int Http::Response::getMinorHttpVersion() const
{
return m_minorVersion;
}
////////////////////////////////////////////////////////////
const std::string& Http::Response::getBody() const
{
return m_body;
}
////////////////////////////////////////////////////////////
void Http::Response::parse(const std::string& data)
{
std::istringstream in(data);
// Extract the HTTP version from the first line
std::string version;
if (in >> version)
{
if ((version.size() >= 8) && (version[6] == '.') &&
(toLower(version.substr(0, 5)) == "http/") &&
isdigit(version[5]) && isdigit(version[7]))
{
m_majorVersion = version[5] - '0';
m_minorVersion = version[7] - '0';
}
else
{
// Invalid HTTP version
m_status = InvalidResponse;
return;
}
}
// Extract the status code from the first line
int status;
if (in >> status)
{
m_status = static_cast<Status>(status);
}
else
{
// Invalid status code
m_status = InvalidResponse;
return;
}
// Ignore the end of the first line
in.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
// Parse the other lines, which contain fields, one by one
parseFields(in);
m_body.clear();
// Determine whether the transfer is chunked
if (toLower(getField("transfer-encoding")) != "chunked")
{
// Not chunked - just read everything at once
std::copy(std::istreambuf_iterator<char>(in), std::istreambuf_iterator<char>(), std::back_inserter(m_body));
}
else
{
// Chunked - have to read chunk by chunk
std::size_t length;
// Read all chunks, identified by a chunk-size not being 0
while (in >> std::hex >> length)
{
// Drop the rest of the line (chunk-extension)
in.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
// Copy the actual content data
std::istreambuf_iterator<char> it(in);
std::istreambuf_iterator<char> itEnd;
for (std::size_t i = 0; ((i < length) && (it != itEnd)); i++)
m_body.push_back(*it++);
}
// Drop the rest of the line (chunk-extension)
in.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
// Read all trailers (if present)
parseFields(in);
}
}
////////////////////////////////////////////////////////////
void Http::Response::parseFields(std::istream &in)
{
std::string line;
while (std::getline(in, line) && (line.size() > 2))
{
std::string::size_type pos = line.find(": ");
if (pos != std::string::npos)
{
// Extract the field name and its value
std::string field = line.substr(0, pos);
std::string value = line.substr(pos + 2);
// Remove any trailing \r
if (!value.empty() && (*value.rbegin() == '\r'))
value.erase(value.size() - 1);
// Add the field
m_fields[toLower(field)] = value;
}
}
}
////////////////////////////////////////////////////////////
Http::Http() :
m_host(),
m_port(0)
{
}
////////////////////////////////////////////////////////////
Http::Http(const std::string& host, unsigned short port)
{
setHost(host, port);
}
////////////////////////////////////////////////////////////
void Http::setHost(const std::string& host, unsigned short port)
{
// Check the protocol
if (toLower(host.substr(0, 7)) == "http://")
{
// HTTP protocol
m_hostName = host.substr(7);
m_port = (port != 0 ? port : 80);
}
else if (toLower(host.substr(0, 8)) == "https://")
{
// HTTPS protocol -- unsupported (requires encryption and certificates and stuff...)
err() << "HTTPS protocol is not supported by sf::Http" << std::endl;
m_hostName = "";
m_port = 0;
}
else
{
// Undefined protocol - use HTTP
m_hostName = host;
m_port = (port != 0 ? port : 80);
}
// Remove any trailing '/' from the host name
if (!m_hostName.empty() && (*m_hostName.rbegin() == '/'))
m_hostName.erase(m_hostName.size() - 1);
m_host = IpAddress(m_hostName);
}
////////////////////////////////////////////////////////////
Http::Response Http::sendRequest(const Http::Request& request, Time timeout)
{
// First make sure that the request is valid -- add missing mandatory fields
Request toSend(request);
if (!toSend.hasField("From"))
{
toSend.setField("From", "user@sfml-dev.org");
}
if (!toSend.hasField("User-Agent"))
{
toSend.setField("User-Agent", "libsfml-network/2.x");
}
if (!toSend.hasField("Host"))
{
toSend.setField("Host", m_hostName);
}
if (!toSend.hasField("Content-Length"))
{
std::ostringstream out;
out << toSend.m_body.size();
toSend.setField("Content-Length", out.str());
}
if ((toSend.m_method == Request::Post) && !toSend.hasField("Content-Type"))
{
toSend.setField("Content-Type", "application/x-www-form-urlencoded");
}
if ((toSend.m_majorVersion * 10 + toSend.m_minorVersion >= 11) && !toSend.hasField("Connection"))
{
toSend.setField("Connection", "close");
}
// Prepare the response
Response received;
// Connect the socket to the host
if (m_connection.connect(m_host, m_port, timeout) == Socket::Done)
{
// Convert the request to string and send it through the connected socket
std::string requestStr = toSend.prepare();
if (!requestStr.empty())
{
// Send it through the socket
if (m_connection.send(requestStr.c_str(), requestStr.size()) == Socket::Done)
{
// Wait for the server's response
std::string receivedStr;
std::size_t size = 0;
char buffer[1024];
while (m_connection.receive(buffer, sizeof(buffer), size) == Socket::Done)
{
receivedStr.append(buffer, buffer + size);
}
// Build the Response object from the received data
received.parse(receivedStr);
}
}
// Close the connection
m_connection.disconnect();
}
return received;
}
} // namespace sf
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