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443 lines (362 loc) · 13.3 KB
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/*
This file is part of libhttpserver
Copyright (C) 2011-2019 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 "httpserver/http_request.h"
#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include "httpserver/http_utils.h"
#include "httpserver/string_utilities.h"
// Custom string_view for C++11, standard string_view for C++17 and above
#if __cplusplus >= 201703L
#include <string_view>
namespace httpserver
{
using string_view = std::string_view;
}
#else
#include "include/utils/string_view.h" // Use custom string_view for C++11
namespace httpserver
{
using string_view = StringView;
}
#endif
namespace httpserver
{
const char http_request::EMPTY[] = "";
struct arguments_accumulator
{
unescaper_ptr unescaper;
std::map<std::string, std::vector<std::string>, http::arg_comparator> *arguments;
};
void http_request::set_method(const std::string &method)
{
this->method = string_utilities::to_upper_copy(method);
}
bool http_request::check_digest_auth(const std::string &realm, const std::string &password, int nonce_timeout, bool *reload_nonce) const
{
string_view digested_user = get_digested_user();
int val = MHD_digest_auth_check(underlying_connection, realm.c_str(), digested_user.data(), password.c_str(), nonce_timeout);
if (val == MHD_INVALID_NONCE)
{
*reload_nonce = true;
return false;
}
else if (val == MHD_NO)
{
*reload_nonce = false;
return false;
}
*reload_nonce = false;
return true;
}
string_view http_request::get_connection_value(string_view key, enum MHD_ValueKind kind) const
{
const char *header_c = MHD_lookup_connection_value(underlying_connection, kind, key.data());
if (header_c == nullptr)
return EMPTY;
return header_c;
}
MHD_Result http_request::build_request_header(void *cls, enum MHD_ValueKind kind, const char *key, const char *value)
{
// Parameters needed to respect MHD interface, but not used in the implementation.
std::ignore = kind;
http::header_view_map *dhr = static_cast<http::header_view_map *>(cls);
(*dhr)[key] = value;
return MHD_YES;
}
const http::header_view_map http_request::get_headerlike_values(enum MHD_ValueKind kind) const
{
http::header_view_map headers;
MHD_get_connection_values(underlying_connection, kind, &build_request_header, reinterpret_cast<void *>(&headers));
return headers;
}
string_view http_request::get_header(string_view key) const
{
return get_connection_value(key, MHD_HEADER_KIND);
}
const http::header_view_map http_request::get_headers() const
{
return get_headerlike_values(MHD_HEADER_KIND);
}
string_view http_request::get_footer(string_view key) const
{
return get_connection_value(key, MHD_FOOTER_KIND);
}
const http::header_view_map http_request::get_footers() const
{
return get_headerlike_values(MHD_FOOTER_KIND);
}
string_view http_request::get_cookie(string_view key) const
{
return get_connection_value(key, MHD_COOKIE_KIND);
}
const http::header_view_map http_request::get_cookies() const
{
return get_headerlike_values(MHD_COOKIE_KIND);
}
void http_request::populate_args() const
{
if (cache->args_populated)
{
return;
}
arguments_accumulator aa;
aa.unescaper = unescaper;
aa.arguments = &cache->unescaped_args;
MHD_get_connection_values(underlying_connection, MHD_GET_ARGUMENT_KIND, &build_request_args, reinterpret_cast<void *>(&aa));
cache->args_populated = true;
}
void http_request::grow_last_arg(const std::string &key, const std::string &value)
{
auto it = cache->unescaped_args.find(key);
if (it != cache->unescaped_args.end())
{
if (!it->second.empty())
{
it->second.back() += value;
}
else
{
it->second.push_back(value);
}
}
else
{
cache->unescaped_args[key] = {value};
}
}
http_arg_value http_request::get_arg(string_view key) const
{
populate_args();
// Convert string_view to std::string for the map lookup
auto it = cache->unescaped_args.find(std::string(key.data(), key.size()));
if (it != cache->unescaped_args.end())
{
http_arg_value arg;
arg.values.reserve(it->second.size());
for (const auto &value : it->second)
{
arg.values.push_back(value);
}
return arg;
}
return http_arg_value();
}
string_view http_request::get_arg_flat(string_view key) const
{
auto const it = cache->unescaped_args.find(std::string(key.data(), key.size()));
if (it != cache->unescaped_args.end())
{
return it->second[0];
}
return get_connection_value(key, MHD_GET_ARGUMENT_KIND);
}
#if __cplusplus >= 201703L // C++17 and later
const http::arg_view_map http_request::get_args() const
{
populate_args();
http::arg_view_map arguments;
for (const auto &[key, value] : cache->unescaped_args)
{
auto &arg_values = arguments[key];
for (const auto &v : value)
{
arg_values.values.push_back(v);
}
}
return arguments;
}
const std::map<string_view, string_view, http::arg_comparator> http_request::get_args_flat() const
{
populate_args();
std::map<string_view, string_view, http::arg_comparator> ret;
for (const auto &[key, val] : cache->unescaped_args)
{
ret[key] = val[0];
}
return ret;
}
#else // C++11
const http::arg_view_map http_request::get_args() const
{
populate_args();
http::arg_view_map arguments;
for (const auto &pair : cache->unescaped_args)
{
const std::string &key = pair.first;
const std::vector<std::string> &value = pair.second;
auto &arg_values = arguments[key];
for (const auto &v : value)
{
arg_values.values.push_back(v);
}
}
return arguments;
}
const std::map<string_view, string_view, http::arg_comparator> http_request::get_args_flat() const
{
populate_args();
std::map<string_view, string_view, http::arg_comparator> ret;
for (const auto &pair : cache->unescaped_args)
{
const std::string &key = pair.first;
const std::vector<std::string> &val = pair.second;
ret[key] = val[0];
}
return ret;
}
#endif
http::file_info &http_request::get_or_create_file_info(const std::string &key, const std::string &upload_file_name)
{
return files[key][upload_file_name];
}
string_view http_request::get_querystring() const
{
if (!cache->querystring.empty())
{
return cache->querystring;
}
MHD_get_connection_values(underlying_connection, MHD_GET_ARGUMENT_KIND, &build_request_querystring, reinterpret_cast<void *>(&cache->querystring));
return cache->querystring;
}
MHD_Result http_request::build_request_args(void *cls, enum MHD_ValueKind kind, const char *key, const char *arg_value)
{
// Parameters needed to respect MHD interface, but not used in the implementation.
std::ignore = kind;
arguments_accumulator *aa = static_cast<arguments_accumulator *>(cls);
std::string value = ((arg_value == nullptr) ? "" : arg_value);
http::base_unescaper(&value, aa->unescaper);
(*aa->arguments)[key].push_back(value);
return MHD_YES;
}
MHD_Result http_request::build_request_querystring(void *cls, enum MHD_ValueKind kind, const char *key_value, const char *arg_value)
{
// Parameters needed to respect MHD interface, but not used in the implementation.
std::ignore = kind;
std::string *querystring = static_cast<std::string *>(cls);
string_view key = key_value;
string_view value = ((arg_value == nullptr) ? "" : arg_value);
// Limit to a single allocation.
querystring->reserve(querystring->size() + key.size() + value.size() + 3);
*querystring += ((*querystring == "") ? "?" : "&");
*querystring += std::string(key.data(), key.size());
*querystring += "=";
*querystring += std::string(value.data(), value.size());
return MHD_YES;
}
void http_request::fetch_user_pass() const
{
char *password = nullptr;
auto *username = MHD_basic_auth_get_username_password(underlying_connection, &password);
if (username != nullptr)
{
cache->username = username;
MHD_free(username);
}
if (password != nullptr)
{
cache->password = password;
MHD_free(password);
}
}
string_view http_request::get_user() const
{
if (!cache->username.empty())
{
return cache->username;
}
fetch_user_pass();
return cache->username;
}
string_view http_request::get_pass() const
{
if (!cache->password.empty())
{
return cache->password;
}
fetch_user_pass();
return cache->password;
}
string_view http_request::get_digested_user() const
{
if (!cache->digested_user.empty())
{
return cache->digested_user;
}
char *digested_user_c = MHD_digest_auth_get_username(underlying_connection);
cache->digested_user = EMPTY;
if (digested_user_c != nullptr)
{
cache->digested_user = digested_user_c;
free(digested_user_c);
}
return cache->digested_user;
}
#ifdef HAVE_GNUTLS
bool http_request::has_tls_session() const
{
const MHD_ConnectionInfo *conninfo = MHD_get_connection_info(underlying_connection, MHD_CONNECTION_INFO_GNUTLS_SESSION);
return (conninfo != nullptr);
}
gnutls_session_t http_request::get_tls_session() const
{
const MHD_ConnectionInfo *conninfo = MHD_get_connection_info(underlying_connection, MHD_CONNECTION_INFO_GNUTLS_SESSION);
return static_cast<gnutls_session_t>(conninfo->tls_session);
}
#endif // HAVE_GNUTLS
string_view http_request::get_requestor() const
{
if (!cache->requestor_ip.empty())
{
return cache->requestor_ip;
}
const MHD_ConnectionInfo *conninfo = MHD_get_connection_info(underlying_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS);
cache->requestor_ip = http::get_ip_str(conninfo->client_addr);
return cache->requestor_ip;
}
uint16_t http_request::get_requestor_port() const
{
const MHD_ConnectionInfo *conninfo = MHD_get_connection_info(underlying_connection, MHD_CONNECTION_INFO_CLIENT_ADDRESS);
return http::get_port(conninfo->client_addr);
}
std::ostream &operator<<(std::ostream &os, const http_request &r)
{
os << std::string(r.get_method().data(), r.get_method().size()) << " Request [user:\""
<< std::string(r.get_user().data(), r.get_user().size()) << "\" pass:\""
<< std::string(r.get_pass().data(), r.get_pass().size()) << "\"] path:\""
<< std::string(r.get_path().data(), r.get_path().size()) << "\"" << std::endl;
http::dump_header_map(os, "Headers", r.get_headers());
http::dump_header_map(os, "Footers", r.get_footers());
http::dump_header_map(os, "Cookies", r.get_cookies());
http::dump_arg_map(os, "Query Args", r.get_args());
os << " Version [ " << std::string(r.get_version().data(), r.get_version().size())
<< " ] Requestor [ " << std::string(r.get_requestor().data(), r.get_requestor().size())
<< " ] Port [ " << r.get_requestor_port() << " ]" << std::endl;
return os;
}
http_request::~http_request()
{
for (const auto &file_key : get_files())
{
for (const auto &files : file_key.second)
{
// C++17 has std::filesystem::remove()
remove(files.second.get_file_system_file_name().c_str());
}
}
}
} // namespace httpserver
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