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cuberite-2a/WebServer/WebServer.cpp

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/*
WebServer.cpp
Copyright (C) 2003-2007 Ren<EFBFBD> Nyffenegger
This source code is provided 'as-is', without any express or implied
warranty. In no event will the author 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 source code must not be misrepresented; you must not
claim that you wrote the original source code. If you use this source code
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 source code.
3. This notice may not be removed or altered from any source distribution.
Ren<EFBFBD> Nyffenegger rene.nyffenegger@adp-gmbh.ch
Thanks to Tom Lynn who pointed out an error in this source code.
*/
/*
Note on point 2:
THIS IS NOT THE ORIGINAL SOURCE1!!1!!!~!!~`1ONE!!`1
*/
#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
#include <ctime>
#ifdef _WIN32
#include <process.h>
#endif
#include <iostream>
#include <sstream>
#include "WebServer.h"
#include "cEvents.h"
#include "Socket.h"
#include "UrlHelper.h"
#include "base64.h"
webserver::request_func webserver::request_func_ = NULL;
static std::string EatLine( std::string& a_String )
{
std::string RetVal = "";
unsigned int StringSize = a_String.size();
const char* c = a_String.c_str();
for( unsigned int i = 0; i < StringSize; ++i, ++c)
{
if( *c == '\n' )
{
RetVal += *c;
// ++i; ++c;
// if( i < StringSize )
// {
// if( *c == '\r' )
// {
// RetVal += *c;
// }
// }
break;
}
RetVal += *c;
}
a_String = a_String.substr( RetVal.size() );
return RetVal;
}
// Turns
// "blabla my string with \"quotes\"!"
// into
// blabla my string with "quotes"!
static std::string GetQuotedString( const std::string& a_String )
{
std::string RetVal;
bool bGotFirstQuote = false;
bool bIgnoreNext = false;
unsigned int StrLen = a_String.size();
for( unsigned int i = 0; i < StrLen; ++i )
{
if( bIgnoreNext == false )
{
if( a_String[i] == '\"' )
{
if( bGotFirstQuote == false )
{
bGotFirstQuote = true;
}
else
{
break;
}
continue;
}
else if( a_String[i] == '\\' ) // Escape character
{
bIgnoreNext = true;
continue;
}
}
RetVal.push_back( a_String[i] );
bIgnoreNext = false;
}
return RetVal;
}
void ParseMultipartFormData( webserver::http_request& req, Socket* s)
{
static const std::string multipart_form_data = "multipart/form-data";
if(req.content_type_.substr(0, multipart_form_data.size()) == multipart_form_data) // Difficult data... :(
{
AStringVector ContentTypeData = StringSplit( req.content_type_, "; " );
std::string boundary;
// Find boundary
for( unsigned int i = 0; i < ContentTypeData.size(); ++i )
{
static const std::string boundary_ = "boundary=";
if( ContentTypeData[i].substr(0, boundary_.size()) == boundary_ ) // Found boundary
{
boundary = ContentTypeData[i].substr( boundary_.size() );
}
}
//LOGINFO("Boundary: %s", boundary.c_str() );
std::string boundary_start = "--" + boundary;
std::string boundary_end = boundary_start + "--";
std::string Content = s->ReceiveBytes( req.content_length_ );
//printf("Total content: \n%s\n", Content.c_str() );
// Should start with boundary!
std::string line = EatLine( Content );
if( line.substr(0, boundary_start.size() ) != boundary_start )
{
// Something was wrong! :(
Content.clear();
}
while( !Content.empty() )
{
webserver::formdata FormData;
static const std::string content_disposition = "Content-Disposition: ";
static const std::string content_type = "Content-Type: ";
std::string f_disposition;
while( 1 )
{
std::string line = EatLine( Content );
if( line.empty() )
break;
unsigned int pos_cr_lf = line.find_first_of("\x0a\x0d");
if (pos_cr_lf == 0) break; // Empty line, indicates end of mime thingy
if( line.substr(0, content_disposition.size() ) == content_disposition )
{
f_disposition = line.substr(content_disposition.size());
LOGINFO("Disposition: %s", f_disposition.c_str() );
}
else if( line.substr(0, content_type.size() ) == content_type )
{
FormData.content_type_ = line.substr(content_type.size());
}
//LOGINFO("Got line: '%s'", line.c_str() );
}
// Check if we got the proper headers
if( !f_disposition.empty() )
{
static const std::string disp_name = "name=";
static const std::string disp_filename = "filename=";
// Parse the disposition
AStringVector DispositionData = StringSplit( f_disposition, "; " );
for( unsigned int i = 0; i < DispositionData.size(); ++i )
{
if( DispositionData[i].substr(0, disp_name.size()) == disp_name )
{
FormData.name_ = GetQuotedString( DispositionData[i].substr(disp_name.size()) );
}
else if( DispositionData[i].substr(0, disp_filename.size()) == disp_filename )
{
FormData.filename_ = GetQuotedString( DispositionData[i].substr(disp_filename.size()) );
}
}
std::string ContentValue;
// Parse until boundary_end is found
while( 1 )
{
std::string line = EatLine( Content );
if( line.empty() )
break;
if( line.substr(0, boundary_end.size() ) == boundary_end )
{
break;
}
else if( line.substr(0, boundary_start.size() ) == boundary_start )
{
break;
}
ContentValue.append( line.c_str(), line.size() );
}
FormData.value_ = ContentValue;
}
req.multipart_formdata_.push_back( FormData );
}
}
}
#ifdef _WIN32
unsigned webserver::Request(void* ptr_s)
#else
void* webserver::Request(void* ptr_s)
#endif
{
Socket* s = (reinterpret_cast<Socket*>(ptr_s));
std::string line = s->ReceiveLine();
if (line.empty())
{
s->Close();
delete s;
return 0;
}
http_request req;
std::string path;
std::map<std::string, std::string> params;
size_t posStartPath = 0;
if (line.find("GET") == 0)
{
req.method_="GET";
posStartPath = line.find_first_not_of(" ",3);
}
else if (line.find("POST") == 0)
{
req.method_="POST";
posStartPath = line.find_first_not_of(" ",4);
}
SplitGetReq(line.substr(posStartPath), path, params);
req.status_ = "202 OK";
req.s_ = s;
req.path_ = path;
req.params_ = params;
static const std::string authorization = "Authorization: Basic ";
static const std::string accept = "Accept: " ;
static const std::string accept_language = "Accept-Language: " ;
static const std::string accept_encoding = "Accept-Encoding: " ;
static const std::string user_agent = "User-Agent: " ;
static const std::string content_length = "Content-Length: " ;
static const std::string content_type = "Content-Type: " ;
while(1)
{
line=s->ReceiveLine();
if (line.empty())
{
break;
}
unsigned int pos_cr_lf = line.find_first_of("\x0a\x0d");
if (pos_cr_lf == 0) break;
line = line.substr(0,pos_cr_lf);
if (line.substr(0, authorization.size()) == authorization)
{
req.authentication_given_ = true;
std::string encoded = line.substr(authorization.size());
std::string decoded = base64_decode(encoded);
unsigned int pos_colon = decoded.find(":");
req.username_ = decoded.substr(0, pos_colon);
req.password_ = decoded.substr(pos_colon+1 );
}
else if (line.substr(0, accept.size()) == accept)
{
req.accept_ = line.substr(accept.size());
}
else if (line.substr(0, accept_language.size()) == accept_language)
{
req.accept_language_ = line.substr(accept_language.size());
}
else if (line.substr(0, accept_encoding.size()) == accept_encoding)
{
req.accept_encoding_ = line.substr(accept_encoding.size());
}
else if (line.substr(0, user_agent.size()) == user_agent)
{
req.user_agent_ = line.substr(user_agent.size());
}
else if (line.substr(0, content_length.size()) == content_length)
{
req.content_length_ = atoi( line.substr(content_length.size()).c_str() );
}
else if (line.substr(0, content_type.size()) == content_type)
{
req.content_type_ = line.substr(content_type.size());
}
}
if( (req.method_.compare("POST") == 0) && (req.content_length_ > 0) )
{
// The only content type we can parse at the moment, the default HTML post data
if( req.content_type_.compare( "application/x-www-form-urlencoded" ) == 0 )
{
std::string Content = s->ReceiveBytes( req.content_length_ );
Content.insert( 0, "/ ?" ); // Little hack, inserts dummy URL so that SplitGetReq() can work with this content
std::string dummy;
std::map<std::string, std::string> post_params;
SplitGetReq(Content, dummy, post_params);
req.params_post_ = post_params;
}
else
{
ParseMultipartFormData( req, s );
}
}
request_func_(&req);
std::stringstream str_str;
str_str << req.answer_.size();
time_t ltime;
time(&ltime);
tm* gmt= gmtime(&ltime);
#ifdef _WIN32
static std::string const serverName = "MCServerWebAdmin (Windows)";
#elif __APPLE__
static std::string const serverName = "MCServerWebAdmin (MacOSX)";
#else
static std::string const serverName = "MCServerWebAdmin (Linux)";
#endif
char* asctime_remove_nl = std::asctime(gmt);
asctime_remove_nl[24] = 0;
s->SendBytes("HTTP/1.1 ");
if (! req.auth_realm_.empty() )
{
s->SendLine("401 Unauthorized");
s->SendBytes("WWW-Authenticate: Basic Realm=\"");
s->SendBytes(req.auth_realm_);
s->SendLine("\"");
}
else
{
s->SendLine(req.status_);
}
s->SendLine(std::string("Date: ") + asctime_remove_nl + " GMT");
s->SendLine(std::string("Server: ") +serverName);
s->SendLine("Connection: close");
s->SendLine("Content-Type: text/html; charset=ISO-8859-1");
s->SendLine("Content-Length: " + str_str.str());
s->SendLine("");
s->SendLine(req.answer_);
s->Close( true ); // true = wait for all data to be sent before closing
delete s;
return 0;
}
void webserver::Stop()
{
m_bStop = true;
m_Socket->Close();
m_Events->Wait();
}
bool webserver::Begin()
{
if (!m_Socket->IsValid())
{
LOGINFO("WebAdmin: The server socket is invalid. Terminating WebAdmin.");
return false;
}
m_bStop = false;
while ( !m_bStop )
{
Socket * ptr_s = m_Socket->Accept();
if (m_bStop)
{
if (ptr_s != 0)
{
ptr_s->Close();
delete ptr_s;
}
break;
}
if (ptr_s == NULL)
{
LOGINFO("WebAdmin: Accepted socket is NULL. Terminating WebAdmin to avoid busywait.");
return false;
}
#ifdef _WIN32
unsigned ret;
HANDLE hHandle = reinterpret_cast<HANDLE>(_beginthreadex(NULL, 0, Request, (void *)ptr_s, 0, &ret));
CloseHandle(hHandle);
#else
// Mattes: TODO: this handle probably leaks!
pthread_t * hHandle = new pthread_t;
pthread_create( hHandle, NULL, Request, ptr_s);
#endif
}
m_Events->Set();
return true;
}
webserver::webserver(unsigned int port_to_listen, request_func r)
{
m_Socket = new SocketServer(port_to_listen, 1);
request_func_ = r;
m_Events = new cEvents();
}
webserver::~webserver()
{
delete m_Socket;
delete m_Events;
}