///////////////////////////////////////////////////////////////////////////////
//
// 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 <cppcms/http_content_filter.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 <cppcms/util.h>
#include <scgi_header.h>
#include <stdlib.h>
#include <cppcms/config.h>
#include "binder.h"
#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_,mfunc_to_event_handler(&cgi_forwarder::on_connected,shared_from_this()));
}
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_),
mfunc_to_io_handler(&cgi_forwarder::on_header_sent,shared_from_this()));
}
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(),
mfunc_to_io_handler(&cgi_forwarder::on_post_data_read,shared_from_this()));
}
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),
mfunc_to_io_handler(&cgi_forwarder::on_post_data_written,shared_from_this()));
}
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(mfunc_to_handler(&cgi_forwarder::cleanup,shared_from_this()));
scgi_.async_read_some(booster::aio::buffer(response_),
mfunc_to_io_handler(&cgi_forwarder::on_response_read,shared_from_this()));
}
void on_response_read(booster::system::error_code const &e,size_t len)
{
if(e) {
conn_->async_write(booster::aio::const_buffer(),true,mfunc_to_event_handler(&cgi_forwarder::cleanup,shared_from_this()));
return;
}
else {
conn_->async_write(booster::aio::buffer(&response_.front(),len),false,mfunc_to_event_handler(&cgi_forwarder::on_response_written,shared_from_this()));
}
}
void on_response_written(booster::system::error_code const &e)
{
if(e) { cleanup(); return; }
scgi_.async_read_some(booster::aio::buffer(response_),
mfunc_to_io_handler(&cgi_forwarder::on_response_read,shared_from_this()));
}
void cleanup()
{
conn_->do_eof();
booster::system::error_code e;
scgi_.shutdown(booster::aio::stream_socket::shut_rdwr,e);
scgi_.close(e);
}
void cleanup(booster::system::error_code const &)
{
cleanup();
}
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_;
};
cppcms::service &connection::service()
{
return *service_;
}
booster::shared_ptr<connection> connection::self()
{
return shared_from_this();
}
void connection::async_prepare_request( http::context *context,
ehandler const &h)
{
booster::system::error_code e;
socket().set_non_blocking(true,e);
if(e) {
BOOSTER_WARNING("cppcms") << "Failed to set nonblocking mode in socket " << e.message();
get_io_service().post(func_to_handler(h,http::context::operation_aborted));
return;
}
async_read_headers(mfunc_to_event_handler(&connection::on_headers_read,self(),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(http::context::operation_aborted);
return;
}
load_content(context,h);
}
void connection::aync_wait_for_close_by_peer(booster::callback<void()> const &on_eof)
{
async_read_eof(mfunc_to_handler(&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(http::context::operation_aborted);
}
void connection::handle_http_error(int code,http::context *context,ehandler const &h)
{
async_chunk_.clear();
if(!context->response().some_output_was_written()) {
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(booster::aio::buffer(async_chunk_),true,
mfunc_to_event_handler(
&connection::handle_http_error_eof,
self(),
code,
h));
}
void connection::handle_http_error_eof(
booster::system::error_code const &e,
int code,
ehandler const &h)
{
if(e) {
set_error(h,e.message());
return;
}
do_eof();
set_error(h,http::response::status_to_string(code));
}
void connection::load_content(http::context *context,ehandler const &h)
{
int status=0;
if((status = context->on_headers_ready())!=0) {
handle_http_error(status,context,h);
return;
}
if(context->request().content_length() > 0) {
std::pair<char *,size_t> buffer = context->request().get_buffer();
async_read_some(buffer.first,buffer.second,
mfunc_to_io_handler(&connection::on_some_content_read,
self(),
context,
h));
}
else {
on_async_read_complete();
h(http::context::operation_completed);
}
}
void connection::on_some_content_read(booster::system::error_code const &e,size_t n,http::context *context,ehandler const &h)
{
if(e) { set_error(h,e.message()); return; }
int status = context->on_content_progress(n);
if(status !=0) {
handle_http_error(status,context,h);
return;
}
std::pair<char *,size_t> buffer = context->request().get_buffer();
if(buffer.second==0) {
on_async_read_complete();
h(http::context::operation_completed);
return;
}
else {
async_read_some(buffer.first,buffer.second,
mfunc_to_io_handler(&connection::on_some_content_read,
self(),
context,
h));
}
}
bool connection::is_reuseable()
{
return error_.empty() && keep_alive();
}
std::string connection::last_error()
{
return error_;
}
struct connection::async_write_binder : public booster::callable<void(booster::system::error_code const &)> {
typedef booster::shared_ptr<cppcms::impl::cgi::connection> conn_type;
conn_type conn;
ehandler h;
bool complete_response;
void reset()
{
h=ehandler();
conn.reset();
complete_response = false;
}
void operator()(booster::system::error_code const &e)
{
if(complete_response) {
conn->do_eof();
}
h(e ? cppcms::http::context::operation_aborted : cppcms::http::context::operation_completed );
if(!conn->cached_async_write_binder_) {
conn->cached_async_write_binder_ = this;
reset();
}
}
};
void connection::async_write_response( http::response &response,
bool complete_response,
ehandler const &h)
{
// prepare cached binder
booster::intrusive_ptr<connection::async_write_binder> tmp;
if(cached_async_write_binder_) {
tmp.swap(cached_async_write_binder_);
}
if(!tmp) {
tmp = new connection::async_write_binder();
}
tmp->conn = self();
tmp->h = h;
tmp->complete_response = complete_response;
// ready
booster::system::error_code e;
if(response.flush_async_chunk(e)!=0 || !has_pending()) {
get_io_service().post(tmp,e);
return;
}
async_write(booster::aio::const_buffer(),false,tmp);
}
bool connection::has_pending()
{
return !pending_output_.empty();
}
void connection::append_pending(booster::aio::const_buffer const &new_data)
{
size_t pos = pending_output_.size();
pending_output_.resize(pending_output_.size() + new_data.bytes_count());
std::pair<booster::aio::const_buffer::entry const *,size_t> packets = new_data.get();
for(size_t i=0;i<packets.second;i++) {
memcpy(&pending_output_[pos],packets.first[i].ptr,packets.first[i].size);
pos += packets.first[i].size;
}
}
bool connection::write(booster::aio::const_buffer const &buf,bool eof,booster::system::error_code &e)
{
booster::aio::const_buffer new_data = format_output(buf,eof,e);
if(e) return false;
booster::aio::const_buffer output = pending_output_.empty() ? new_data : (booster::aio::buffer(pending_output_) + new_data);
if(output.empty())
return true;
socket().set_non_blocking_if_needed(false,e);
if(e) return false;
bool r=write_to_socket(output,e);
pending_output_.clear();
return r;
}
bool connection::write_to_socket(booster::aio::const_buffer const &in,booster::system::error_code &e)
{
return socket().write(in,e) == in.bytes_count();
}
bool connection::nonblocking_write(booster::aio::const_buffer const &buf,bool eof,booster::system::error_code &e)
{
booster::aio::const_buffer new_data = format_output(buf,eof,e);
if(e) return false;
booster::aio::const_buffer output = pending_output_.empty() ? new_data : (booster::aio::buffer(pending_output_) + new_data);
if(output.empty())
return true;
socket().set_non_blocking_if_needed(true,e);
if(e) return false;
size_t n = socket().write_some(output,e);
if(n == output.bytes_count()) {
pending_output_.clear();
return true;
}
if(n == 0) {
append_pending(new_data);
}
else {
std::vector<char> tmp;
pending_output_.swap(tmp);
// after swapping output still points to a valid buffer
append_pending(output + n);
}
if(e && socket().would_block(e)) {
e=booster::system::error_code();
return false;
}
return false;
}
struct connection::async_write_handler : public booster::callable<void(booster::system::error_code const &e)>
{
typedef booster::shared_ptr<cppcms::impl::cgi::connection> conn_type;
typedef booster::intrusive_ptr< booster::callable<void(booster::system::error_code const &)> > self_type;
std::vector<char> data;
booster::aio::const_buffer output;
handler h;
conn_type conn;
async_write_handler(conn_type const &c,std::vector<char> &d,handler const &hin) :
h(hin),
conn(c)
{
data.swap(d);
output = booster::aio::buffer(data);
}
virtual void operator()(booster::system::error_code const &ein)
{
if(ein) { h(ein); return; }
booster::system::error_code e;
conn->socket().set_non_blocking_if_needed(true,e);
size_t n = conn->socket().write_some(output,e);
output += n;
if(n!=0) {
conn->on_async_write_progress(output.empty());
}
if(output.empty()) {
h(e);
return;
}
if(e && booster::aio::basic_io_device::would_block(e)) {
conn->socket().on_writeable(self_type(this));
return;
}
h(e);
}
};
void connection::async_write(booster::aio::const_buffer const &buf,bool eof,handler const &h)
{
booster::system::error_code e;
if(nonblocking_write(buf,eof,e) || e) {
get_io_service().post(h,e);
return;
}
on_async_write_start();
async_write_handler::self_type p(new async_write_handler(self(),pending_output_,h));
socket().on_writeable(p);
}
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);
}
};
void connection::async_read(void *p,size_t s,io_handler const &h)
{
reader r(this,h,s,(char*)p);
r();
}
connection::connection(cppcms::service &srv) :
service_(&srv),
request_in_progress_(true)
{
}
connection::~connection()
{
}
} // cgi
} // impl
} // cppcms
