rstudio/src/cpp/core/http/Message.cpp at master · pearsonca/rstudio · GitHub

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* Message.cpp

* Unless you have received this program directly from RStudio pursuant

* to the terms of a commercial license agreement with RStudio, then

* this program is licensed to you under the terms of version 3 of the

* GNU Affero General Public License. This program is distributed WITHOUT

* ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,

* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the

* AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.

#include <core/http/Message.hpp>

#include <algorithm>

#include <boost/lexical_cast.hpp>

#include <boost/algorithm/string/trim.hpp>

#include <boost/function.hpp>

#include <boost/asio/buffer.hpp>

#include <shared_core/SafeConvert.hpp>

namespace rstudio {

namespace core {

namespace http {

// encodings

const char * const kGzipEncoding = "gzip";

const char * const kDeflateEncoding = "deflate";

// transfer encodings

const char * const kTransferEncoding = "Transfer-Encoding";

const char * const kChunkedTransferEncoding = "chunked";

void Message::setHttpVersion(int httpVersionMajor, int httpVersionMinor)

{

httpVersionMajor_ = httpVersionMajor ;

httpVersionMinor_ = httpVersionMinor ;

}

void Message::setContentType(const std::string& contentType)

{

setHeader("Content-Type", contentType) ;

}

std::string Message::contentType() const

{

return headerValue("Content-Type") ;

}

uintmax_t Message::contentLength() const

{

std::string value = headerValue("Content-Length");

if (value.empty())

return 0;

return safe_convert::stringTo<std::size_t>(value, 0);

}

void Message::setContentLength(uintmax_t contentLength)

{

setHeader("Content-Length", contentLength);

}

void Message::addHeader(const std::string& name, const std::string& value)

{

Header header ;

header.name = name ;

header.value = value ;

addHeader(header);

}

void Message::addHeader(const Header& header)

{

headers_.push_back(header);

}

void Message::addHeaders(const std::vector<Header>& headers)

{

std::copy(headers.begin(), headers.end(), std::back_inserter(headers_));

}

std::string Message::headerValue(const std::string& name) const

{

return http::headerValue(headers_, name);

}

bool Message::containsHeader(const std::string& name) const

{

return http::containsHeader(headers_, name);

}

void Message::setHeaderLine(const std::string& line)

{

Header header;

if (http::parseHeader(line, &header))

setHeader(header);

}

void Message::setHeader(const Header& header)

{

setHeader(header.name, header.value);

}

void Message::setHeader(const std::string& name, const std::string& value)

{

Headers::iterator it = std::find_if(headers_.begin(),

headers_.end(),

HeaderNamePredicate(name));

if ( it != headers_.end() )

{

Header hdr ;

hdr.name = name ;

hdr.value = value ;

*it = hdr ;

}

else

{

addHeader(name, value) ;

}

void Message::setHeader(const std::string& name, int value)

{

setHeader(name, safe_convert::numberToString(value));

}

void Message::setHeader(const std::string& name, uintmax_t value)

{

setHeader(name, safe_convert::numberToString(value));

}

void Message::replaceHeader(const std::string& name, const std::string& value)

{

Header hdr ;

hdr.name = name ;

hdr.value = value ;

std::replace_if(headers_.begin(),

headers_.end(),

HeaderNamePredicate(name),

hdr) ;

}

void Message::removeHeader(const std::string& name)

{

headers_.erase(std::remove_if(headers_.begin(),

headers_.end(),

HeaderNamePredicate(name)),

headers_.end()) ;

}

void Message::reset()

{

setHttpVersion(1,1) ;

httpVersion_.clear() ;

headers_.clear() ;

body_.clear() ;

// allow additional reseting by subclasses

resetMembers() ;

}

namespace {

const char Space[] = { ' ' } ;

const char HeaderSeparator[] = { ':', ' ' } ;

const char CrLf[] = { '\r', '\n' } ;

void appendHeader(const Header& header,

std::vector<boost::asio::const_buffer>* pBuffers)

{

pBuffers->push_back(boost::asio::buffer(header.name)) ;

pBuffers->push_back(boost::asio::buffer(HeaderSeparator)) ;

pBuffers->push_back(boost::asio::buffer(header.value)) ;

pBuffers->push_back(boost::asio::buffer(CrLf)) ;

}

std::vector<boost::asio::const_buffer> Message::toBuffers(

const Header& overrideHeader) const

{

// buffers to return

std::vector<boost::asio::const_buffer> buffers ;

// headers

std::vector<boost::asio::const_buffer> headerBuffs =

headerBuffers(overrideHeader);

buffers.insert(buffers.end(), headerBuffs.begin(), headerBuffs.end());

// body

buffers.push_back(boost::asio::buffer(body_)) ;

// return the buffers

return buffers ;

}

std::vector<boost::asio::const_buffer> Message::headerBuffers(

const Header& overrideHeader) const

{

// buffers to return

std::vector<boost::asio::const_buffer> buffers ;

// call subclass to append first line

appendFirstLineBuffers(buffers) ;

buffers.push_back(boost::asio::buffer(CrLf)) ;

// copy override header (for stable storage)

overrideHeader_ = overrideHeader;

// headers

for (Headers::const_iterator

it = headers_.begin(); it != headers_.end(); ++it)

{

// add the header if it isn't being overriden

if (it->name != overrideHeader_.name)

appendHeader(*it, &buffers);

}

// add override header

if (!overrideHeader_.empty())

appendHeader(overrideHeader_, &buffers);

// empty line

buffers.push_back(boost::asio::buffer(CrLf)) ;

// return the buffers

return buffers ;

}

void Message::appendSpaceBuffer(

std::vector<boost::asio::const_buffer>& buffers) const

{

buffers.push_back(boost::asio::buffer(Space)) ;

}

void Message::appendHttpVersionBuffers(

std::vector<boost::asio::const_buffer>& buffers) const

{

std::ostringstream httpVersionStream;

httpVersionStream << "HTTP/" << httpVersionMajor_ << "." << httpVersionMinor_ ;

httpVersion_ = httpVersionStream.str() ;

buffers.push_back(boost::asio::buffer(httpVersion_)) ;

}

std::ostream& operator << (std::ostream& stream, const Message& m)

{

// headers

for (Headers::const_iterator it =

m.headers().begin(); it != m.headers().end(); ++ it)

{

stream << it->name << ": " << it->value << std::endl ;

}

// empty line

stream << std::endl ;

// body

stream << m.body() << std::endl ;

return stream ;

}

} // namespace http

} // namespace core

} // namespace rstudio

rstudio/src/cpp/core/http/Message.cpp at master · pearsonca/rstudio · GitHub

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