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http_response.cpp
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309 lines (269 loc) · 7.84 KB
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/*
This file is part of libhttpserver
Copyright (C) 2011, 2012, 2013, 2014 Sebastiano Merlino
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
USA
*/
#include <cstdio>
#include <functional>
#include <iostream>
#include <sstream>
#include <fcntl.h>
#include <unistd.h>
#include "http_utils.hpp"
#include "details/http_resource_mirror.hpp"
#include "details/event_tuple.hpp"
#include "webserver.hpp"
#include "http_response.hpp"
#include "http_response_builder.hpp"
using namespace std;
namespace httpserver
{
http_response::http_response(const http_response_builder& builder):
content(builder._content_hook),
response_code(builder._response_code),
autodelete(builder._autodelete),
realm(builder._realm),
opaque(builder._opaque),
reload_nonce(builder._reload_nonce),
fp(-1),
filename(builder._content_hook),
headers(builder._headers),
footers(builder._footers),
cookies(builder._cookies),
topics(builder._topics),
keepalive_secs(builder._keepalive_secs),
keepalive_msg(builder._keepalive_msg),
send_topic(builder._send_topic),
underlying_connection(0x0),
ca(0x0),
closure_data(0x0),
ce(builder._ce),
data_callback(builder._data_callback),
get_raw_response(this, builder._get_raw_response),
decorate_response(this, builder._decorate_response),
enqueue_response(this, builder._enqueue_response),
completed(false),
ws(0x0),
connection_id(0x0)
{
}
http_response::~http_response()
{
if(ce != 0x0)
webserver::unlock_cache_entry(ce);
}
size_t http_response::get_headers(std::map<std::string, std::string, header_comparator>& result) const
{
result = this->headers;
return result.size();
}
size_t http_response::get_footers(std::map<std::string, std::string, header_comparator>& result) const
{
result = this->footers;
return result.size();
}
size_t http_response::get_cookies(std::map<std::string, std::string, header_comparator>& result) const
{
result = this->cookies;
return result.size();
}
//RESPONSE
void http_response::get_raw_response_str(MHD_Response** response, webserver* ws)
{
size_t size = &(*content.end()) - &(*content.begin());
*response = MHD_create_response_from_buffer(
size,
(void*) content.c_str(),
MHD_RESPMEM_PERSISTENT
);
}
void http_response::decorate_response_str(MHD_Response* response)
{
map<string, string, header_comparator>::iterator it;
for (it=headers.begin() ; it != headers.end(); ++it)
MHD_add_response_header(
response,
(*it).first.c_str(),
(*it).second.c_str()
);
for (it=footers.begin() ; it != footers.end(); ++it)
MHD_add_response_footer(response,
(*it).first.c_str(),
(*it).second.c_str()
);
for (it=cookies.begin(); it != cookies.end(); ++it)
MHD_add_response_header(
response,
"Set-Cookie",
((*it).first + "=" + (*it).second).c_str()
);
}
int http_response::enqueue_response_str(
MHD_Connection* connection,
MHD_Response* response
)
{
return MHD_queue_response(connection, response_code, response);
}
void http_response::decorate_response_cache(MHD_Response* response)
{
}
int http_response::enqueue_response_basic(
MHD_Connection* connection,
MHD_Response* response
)
{
return MHD_queue_basic_auth_fail_response(
connection,
realm.c_str(),
response
);
}
int http_response::enqueue_response_digest(
MHD_Connection* connection,
MHD_Response* response
)
{
return MHD_queue_auth_fail_response(
connection,
realm.c_str(),
opaque.c_str(),
response,
reload_nonce ? MHD_YES : MHD_NO
);
}
void http_response::get_raw_response_file(
MHD_Response** response,
webserver* ws
)
{
int fd = open(filename.c_str(), O_RDONLY);
size_t size = lseek(fd, 0, SEEK_END);
if(size)
{
*response = MHD_create_response_from_fd(size, fd);
}
else
{
*response = MHD_create_response_from_buffer(
0,
(void*) "",
MHD_RESPMEM_PERSISTENT
);
}
}
void http_response::get_raw_response_cache(
MHD_Response** response,
webserver* ws
)
{
bool valid;
http_response* r;
if(ce == 0x0)
r = ws->get_from_cache(content, &valid, &ce, true, false);
else
webserver::get_response(ce, &r);
r->get_raw_response(response, ws);
r->decorate_response(*response); //It is done here to avoid to search two times for the same element
//TODO: Check if element is not in cache and throw exception
}
namespace details
{
ssize_t cb(void* cls, uint64_t pos, char* buf, size_t max)
{
ssize_t val = (*static_cast<http_response*>(cls)->data_callback)(buf, max);
if(val == -1)
static_cast<http_response*>(cls)->completed = true;
return val;
}
void free_cb(void* cls)
{
delete static_cast<http_response*>(cls)->data_callback;
}
}
void http_response::get_raw_response_deferred(
MHD_Response** response,
webserver* ws
)
{
if(!completed)
*response = MHD_create_response_from_callback(
MHD_SIZE_UNKNOWN,
1024,
&details::cb,
this,
&details::free_cb
);
else
static_cast<http_response*>(this)->get_raw_response(response, ws);
}
void http_response::decorate_response_deferred(MHD_Response* response)
{
if(completed)
static_cast<http_response*>(this)->decorate_response(response);
}
void http_response::get_raw_response_lp_receive(
MHD_Response** response,
webserver* ws
)
{
this->ws = ws;
this->connection_id = MHD_get_connection_info(
this->underlying_connection,
MHD_CONNECTION_INFO_CLIENT_ADDRESS
)->client_addr;
*response = MHD_create_response_from_callback(MHD_SIZE_UNKNOWN, 80,
&http_response::data_generator, (void*) this, NULL);
ws->register_to_topics(
topics,
connection_id,
keepalive_secs,
keepalive_msg
);
}
ssize_t http_response::data_generator(
void* cls,
uint64_t pos,
char* buf,
size_t max
)
{
http_response* _this = static_cast<http_response*>(cls);
if(_this->ws->pop_signaled(_this->connection_id))
{
string message;
size_t size = _this->ws->read_message(_this->connection_id, message);
memcpy(buf, message.c_str(), size);
return size;
}
else
return 0;
}
void http_response::get_raw_response_lp_send(
MHD_Response** response,
webserver* ws
)
{
http_response::get_raw_response_str(response, ws);
ws->send_message_to_topic(send_topic, content);
}
std::ostream &operator<< (std::ostream &os, const http_response &r)
{
os << "Response [response_code:" << r.response_code << "]" << std::endl;
http::dump_header_map(os,"Headers",r.headers);
http::dump_header_map(os,"Footers",r.footers);
http::dump_header_map(os,"Cookies",r.cookies);
return os;
}
};