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HTTPFramingStrategy.cpp
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HTTPFramingStrategy.cpp
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#include "HTTPFramingStrategy.h"
#include <regex>
using namespace Dumais::WebServer;
int HTTPFramingStrategy::processData(char* buffer, size_t size, FullMessageInfo& info)
{
if (info.buffer == 0)
{
info.buffer = new char[size];
}
else
{
char* tmp = new char[size+info.size];
memcpy(tmp,info.buffer,info.size);
delete info.buffer;
info.buffer = tmp;
}
memcpy((char*)&info.buffer[info.size],buffer,size);
// search for end of header
std::string message = info.buffer;
size_t eoh = message.find("\r\n\r\n");
if (eoh == std::string::npos)
{
// Full header was not received. continue to receive data.
info.size+=size;
// If the buffer is bigger than 2k and we still didn't receive the end of header, then reject this connection
if (info.size > 2048)
{
delete info.buffer;
return -2;
}
return size;
}
std::regex r("transfer-encoding: *chunked",std::regex_constants::icase);
std::smatch matches;
if (std::regex_search(message,matches,r))
{
return -3;
}
std::regex r2("Content-Length: *(.*)",std::regex_constants::icase);
unsigned int contentLength = 0;
if (std::regex_search(message,matches,r2))
{
contentLength = atoi(matches[1].str().c_str());
}
// check if full message was received
if ((info.size+size) < (eoh+4+contentLength))
{
// Not finished receiving content. Carry on
info.size+=size;
return size;
}
info.complete = true;
// check if we have other data at the end of the message
unsigned int delta = (eoh+4+contentLength)-info.size;
if (delta < size)
{
info.size+=delta;
}
else
{
info.size+=size;
}
return delta;
}