///////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2008-2012 Artyom Beilis (Tonkikh) <artyomtnk@yahoo.com>
//
// See accompanying file COPYING.TXT file for licensing details.
//
///////////////////////////////////////////////////////////////////////////////
#define CPPCMS_SOURCE
#include <cppcms/url_dispatcher.h>
#include <cppcms/http_context.h>
#include <cppcms/http_request.h>
#include <cppcms/http_response.h>
#include <cppcms/forwarder.h>
#include "http_protocol.h"
#include <cppcms/service.h>
#include "service_impl.h"
#include "cached_settings.h"
#include <cppcms/json.h>
#include "cgi_api.h"
#include "multipart_parser.h"
#include <cppcms/util.h>
#include <scgi_header.h>
#include <stdlib.h>
#include <cppcms/config.h>
#ifdef CPPCMS_USE_EXTERNAL_BOOST
# include <boost/bind.hpp>
#else // Internal Boost
# include <cppcms_boost/bind.hpp>
namespace boost = cppcms_boost;
#endif
#include <booster/log.h>
#include <booster/aio/endpoint.h>
#include <booster/aio/aio_category.h>
#include <booster/aio/socket.h>
#include <booster/aio/buffer.h>
namespace cppcms { namespace impl { namespace cgi {
//
// Special forwarder from generic CGI to SCGI
//
struct connection::cgi_forwarder : public booster::enable_shared_from_this<connection::cgi_forwarder> {
public:
cgi_forwarder(booster::shared_ptr<connection> c,std::string ip,int port) :
conn_(c),
scgi_(c->get_io_service()),
ep_(ip,port)
{
booster::aio::endpoint ep(ip,port);
booster::system::error_code e;
scgi_.open(ep.family(),e);
if(e) { return; }
}
void async_run()
{
scgi_.async_connect(ep_,boost::bind(&cgi_forwarder::on_connected,shared_from_this(),_1));
}
private:
void on_connected(booster::system::error_code const &e)
{
if(e) return;
header_ = make_scgi_header(conn_->getenv(),0);
scgi_.async_write(
booster::aio::buffer(header_),
boost::bind(&cgi_forwarder::on_header_sent,shared_from_this(),_1,_2));
}
void on_header_sent(booster::system::error_code const &e,size_t n)
{
if(e || n!=header_.size())
return;
header_.clear();
std::string slen = conn_->getenv("CONTENT_LENGTH");
content_length_ = slen.empty() ? 0LL : atoll(slen.c_str());
if(content_length_ > 0) {
post_.resize( content_length_ > 8192 ? 8192 : content_length_,0);
write_post();
}
else {
response_.resize(8192);
read_response();
}
}
void write_post()
{
if(content_length_ > 0) {
if(content_length_ < (long long)(post_.size())) {
post_.resize(content_length_);
}
conn_->async_read_some(&post_.front(),post_.size(),
boost::bind(&cgi_forwarder::on_post_data_read,shared_from_this(),_1,_2));
}
else {
response_.swap(post_);
response_.resize(8192);
read_response();
}
}
void on_post_data_read(booster::system::error_code const &e,size_t len)
{
if(e) { cleanup(); return; }
conn_->on_async_read_complete();
scgi_.async_write(
booster::aio::buffer(&post_.front(),len),
boost::bind(&cgi_forwarder::on_post_data_written,shared_from_this(),_1,_2));
}
void on_post_data_written(booster::system::error_code const &e,size_t len)
{
if(e) { return; }
content_length_ -= len;
write_post();
}
void read_response()
{
conn_->async_read_eof(boost::bind(&cgi_forwarder::cleanup,shared_from_this()));
scgi_.async_read_some(booster::aio::buffer(response_),
boost::bind(&cgi_forwarder::on_response_read,shared_from_this(),_1,_2));
}
void on_response_read(booster::system::error_code const &e,size_t len)
{
if(e) {
conn_->async_write_eof(boost::bind(&cgi_forwarder::cleanup,shared_from_this()));
return;
}
else {
conn_->async_write(&response_.front(),len,boost::bind(&cgi_forwarder::on_response_written,shared_from_this(),_1,_2));
}
}
void on_response_written(booster::system::error_code const &e,size_t /*len*/)
{
if(e) { cleanup(); return; }
scgi_.async_read_some(booster::aio::buffer(response_),
boost::bind(&cgi_forwarder::on_response_read,shared_from_this(),_1,_2));
}
void cleanup()
{
booster::system::error_code e;
scgi_.shutdown(booster::aio::stream_socket::shut_rdwr,e);
scgi_.close(e);
}
booster::shared_ptr<connection> conn_;
booster::aio::stream_socket scgi_;
booster::aio::endpoint ep_;
long long int content_length_;
std::string header_;
std::vector<char> post_;
std::vector<char> response_;
};
connection::connection(cppcms::service &srv) :
service_(&srv),
request_in_progress_(true)
{
}
connection::~connection()
{
}
cppcms::service &connection::service()
{
return *service_;
}
booster::shared_ptr<connection> connection::self()
{
return shared_from_this();
}
void connection::async_prepare_request( http::context *context,
booster::callback<void(bool)> const &h)
{
async_read_headers(boost::bind(&connection::on_headers_read,self(),_1,context,h));
}
void connection::on_headers_read(booster::system::error_code const &e,http::context *context,ehandler const &h)
{
if(e) {
set_error(h,e.message());
return;
}
forwarder::address_type addr = service().forwarder().check_forwading_rules(
cgetenv("HTTP_HOST"),
cgetenv("SCRIPT_NAME"),
cgetenv("PATH_INFO"));
if(addr.second != 0 && !addr.first.empty()) {
booster::shared_ptr<cgi_forwarder> f(new cgi_forwarder(self(),addr.first,addr.second));
f->async_run();
h(true);
return;
}
context->request().prepare();
load_content(e,context,h);
}
void connection::aync_wait_for_close_by_peer(booster::callback<void()> const &on_eof)
{
async_read_eof(boost::bind(&connection::handle_eof,self(),on_eof));
}
void connection::handle_eof(callback const &on_eof)
{
if(request_in_progress_) {
on_eof();
}
}
void connection::set_error(ehandler const &h,std::string s)
{
error_=s;
h(true);
}
void connection::handle_http_error(int code,http::context *context,ehandler const &h)
{
async_chunk_.clear();
async_chunk_.reserve(256);
std::string status;
status.reserve(128);
status += char('0' + code/100);
status += char('0' + code/10 % 10);
status += char('0' + code % 10);
status += ' ';
status += http::response::status_to_string(code);
if(context->service().cached_settings().service.generate_http_headers) {
async_chunk_ += "HTTP/1.0 ";
async_chunk_ += status;
async_chunk_ += "\r\n"
"Connection: close\r\n"
"Content-Type: text/html\r\n"
"\r\n";
}
else {
async_chunk_ += "Content-Type: text/html\r\n"
"Status: ";
async_chunk_ += status;
async_chunk_ += "\r\n"
"\r\n";
}
async_chunk_ +=
"<html>\r\n"
"<body>\r\n"
"<h1>";
async_chunk_ += status;
async_chunk_ += "</h1>\r\n"
"</body>\r\n"
"</html>\r\n";
async_write(async_chunk_.c_str(),async_chunk_.size(),
boost::bind(
&connection::handle_http_error_eof,
self(),
_1,
_2,
code,
h));
}
void connection::handle_http_error_eof(
booster::system::error_code const &e,
size_t /*n*/,
int code,
ehandler const &h)
{
if(e) {
set_error(h,e.message());
return;
}
async_write_eof(boost::bind(&connection::handle_http_error_done,self(),_1,code,h));
}
void connection::handle_http_error_done(booster::system::error_code const &e,int code,ehandler const &h)
{
if(e) {
set_error(h,e.message());
return;
}
set_error(h,http::response::status_to_string(code));
}
void connection::load_content(booster::system::error_code const &e,http::context *context,ehandler const &h)
{
if(e) {
set_error(h,e.message());
return;
}
http::content_type content_type = context->request().content_type_parsed();
char const *s_content_length=cgetenv("CONTENT_LENGTH");
long long content_length = *s_content_length == 0 ? 0 : atoll(s_content_length);
if(content_length < 0) {
handle_http_error(400,context,h);
return;
}
if(content_length > 0) {
if(content_type.media_type()=="multipart/form-data") {
// 64 MB
long long allowed=service().cached_settings().security.multipart_form_data_limit*1024;
if(content_length > allowed) {
BOOSTER_NOTICE("cppcms") << "multipart/form-data size too big " << content_length <<
" REMOTE_ADDR = `" << getenv("REMOTE_ADDR") << "' REMOTE_HOST=`" << getenv("REMOTE_HOST") << "'";
handle_http_error(413,context,h);
return;
}
multipart_parser_.reset(new multipart_parser(
service().cached_settings().security.uploads_path,
service().cached_settings().security.file_in_memory_limit));
read_size_ = content_length;
if(!multipart_parser_->set_content_type(content_type)) {
BOOSTER_NOTICE("cppcms") << "Invalid multipart/form-data request" << content_length <<
" REMOTE_ADDR = `" << getenv("REMOTE_ADDR") << "' REMOTE_HOST=`" << getenv("REMOTE_HOST") << "'";
handle_http_error(400,context,h);
return;
}
content_.clear();
content_.resize(8192);
async_read_some(&content_.front(),content_.size(),
boost::bind(&connection::on_some_multipart_read,
self(),
_1,
_2,
context,
h));
}
else {
long long allowed=service().cached_settings().security.content_length_limit*1024;
if(content_length > allowed) {
BOOSTER_NOTICE("cppcms") << "POST data size too big " << content_length <<
" REMOTE_ADDR = `" << getenv("REMOTE_ADDR") << "' REMOTE_HOST=`" << getenv("REMOTE_HOST") << "'";
handle_http_error(413,context,h);
return;
}
content_.clear();
content_.resize(content_length,0);
async_read( &content_.front(),
content_.size(),
boost::bind(&connection::on_post_data_loaded,self(),_1,context,h));
}
}
else {
on_post_data_loaded(booster::system::error_code(),context,h);
}
}
void connection::on_some_multipart_read(booster::system::error_code const &e,size_t n,http::context *context,ehandler const &h)
{
if(e) { set_error(h,e.message()); return; }
read_size_-=n;
if(read_size_ < 0) { handle_http_error(400,context,h); return ;}
multipart_parser::parsing_result_type r = multipart_parser_->consume(&content_.front(),n);
if(r == multipart_parser::eof) {
if(read_size_ != 0) {
handle_http_error(400,context,h);
return;
}
content_.clear();
multipart_parser::files_type files = multipart_parser_->get_files();
long long allowed=service().cached_settings().security.content_length_limit*1024;
for(unsigned i=0;i<files.size();i++) {
if(files[i]->mime().empty() && files[i]->size() > allowed) {
BOOSTER_NOTICE("cppcms") << "multipart/form-data non-file entry size too big " <<
files[i]->size()
<< " REMOTE_ADDR = `" << getenv("REMOTE_ADDR")
<< "' REMOTE_HOST=`" << getenv("REMOTE_HOST") << "'";
handle_http_error(413,context,h);
return;
}
}
context->request().set_post_data(files);
multipart_parser_.reset();
h(false);
return;
}
else if (r==multipart_parser::parsing_error) {
handle_http_error(400,context,h);
return;
}
else if(read_size_ == 0) {
handle_http_error(400,context,h);
return;
}
else {
async_read_some(&content_.front(),content_.size(),
boost::bind(&connection::on_some_multipart_read,
self(),
_1,
_2,
context,
h));
}
}
void connection::on_post_data_loaded(booster::system::error_code const &e,http::context *context,ehandler const &h)
{
if(e) { set_error(h,e.message()); return; }
context->request().set_post_data(content_);
on_async_read_complete();
h(false);
}
bool connection::is_reuseable()
{
return error_.empty() && keep_alive();
}
std::string connection::last_error()
{
return error_;
}
void connection::async_write_response( http::response &response,
bool complete_response,
ehandler const &h)
{
async_chunk_=response.get_async_chunk();
if(!async_chunk_.empty()) {
async_write( async_chunk_.data(),
async_chunk_.size(),
boost::bind( &connection::on_async_write_written,
self(),
_1,
complete_response,
h));
return;
}
if(complete_response) {
on_async_write_written(booster::system::error_code(),complete_response,h);
return;
}
service().impl().get_io_service().post(boost::bind(h,false));
}
void connection::on_async_write_written(booster::system::error_code const &e,bool complete_response,ehandler const &h)
{
if(e) {
BOOSTER_WARNING("cppcms") << "Writing response failed:" << e.message();
service().impl().get_io_service().post(boost::bind(h,true));
return;
}
if(complete_response) {
async_write_eof(boost::bind(&connection::on_eof_written,self(),_1,h));
request_in_progress_=false;
return;
}
service().impl().get_io_service().post(boost::bind(h,false));
}
void connection::async_complete_response(ehandler const &h)
{
async_write_eof(boost::bind(&connection::on_eof_written,self(),_1,h));
request_in_progress_=false;
}
void connection::complete_response()
{
write_eof();
}
void connection::on_eof_written(booster::system::error_code const &e,ehandler const &h)
{
if(e) { set_error(h,e.message()); return; }
h(false);
}
struct connection::reader {
reader(connection *C,io_handler const &H,size_t S,char *P) : h(H), s(S), p(P),conn(C)
{
done=0;
}
io_handler h;
size_t s;
size_t done;
char *p;
connection *conn;
void operator() (booster::system::error_code const &e=booster::system::error_code(),size_t read = 0)
{
if(e) {
h(e,done+read);
return;
}
s-=read;
p+=read;
done+=read;
if(s==0)
h(booster::system::error_code(),done);
else
conn->async_read_some(p,s,*this);
}
};
struct connection::writer {
writer(connection *C,io_handler const &H,size_t S,char const *P) : h(H), s(S), p(P),conn(C)
{
done=0;
}
io_handler h;
size_t s;
size_t done;
char const *p;
connection *conn;
void operator() (booster::system::error_code const &e=booster::system::error_code(),size_t wr = 0)
{
if(e) {
h(e,done+wr);
return;
}
s-=wr;
p+=wr;
done+=wr;
if(s==0)
h(booster::system::error_code(),done);
else
conn->async_write_some(p,s,*this);
}
};
void connection::async_read(void *p,size_t s,io_handler const &h)
{
reader r(this,h,s,(char*)p);
r();
}
void connection::async_write(void const *p,size_t s,io_handler const &h)
{
writer w(this,h,s,(char const *)p);
w();
}
size_t connection::write(void const *data,size_t n,booster::system::error_code &e)
{
char const *p=reinterpret_cast<char const *>(data);
size_t wr=0;
while(n > 0) {
size_t d=write_some(p,n,e);
if(d == 0)
return wr;
p+=d;
wr+=d;
n-=d;
if(e)
return wr;
}
return wr;
}
} // cgi
} // impl
} // cppcms
