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611 lines (547 loc) · 22.1 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 <stdio.h>
#include <stdlib.h>
#include <string.h>
#if defined(__MINGW32__) || defined(__CYGWIN32__)
#define _WINDOWS
#undef _WIN32_WINNT
#define _WIN32_WINNT 0x600
#include <winsock2.h>
#include <ws2tcpip.h>
#else
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#endif
#include <sstream>
#include <iomanip>
#include <fstream>
#include <iostream>
#include <stdexcept>
#include "string_utilities.hpp"
#include "http_utils.hpp"
#pragma GCC diagnostic ignored "-Warray-bounds"
#define CHECK_BIT(var,pos) ((var) & (1<<(pos)))
#define SET_BIT(var,pos) ((var) |= 1 << (pos))
#define CLEAR_BIT(var,pos) ((var) &= ~(1<<(pos)))
using namespace std;
namespace httpserver {
namespace http {
/* See also: http://www.w3.org/Protocols/rfc2616/rfc2616-sec14.html */
const int http_utils::http_continue = MHD_HTTP_CONTINUE;
const int http_utils::http_switching_protocol = MHD_HTTP_SWITCHING_PROTOCOLS;
const int http_utils::http_processing = MHD_HTTP_PROCESSING;
const int http_utils::http_ok = MHD_HTTP_OK;
const int http_utils::http_created = MHD_HTTP_CREATED;
const int http_utils::http_accepted = MHD_HTTP_ACCEPTED;
const int http_utils::http_non_authoritative_information =
MHD_HTTP_NON_AUTHORITATIVE_INFORMATION;
const int http_utils::http_no_content = MHD_HTTP_NO_CONTENT;
const int http_utils::http_reset_content = MHD_HTTP_RESET_CONTENT;
const int http_utils::http_partial_content = MHD_HTTP_PARTIAL_CONTENT;
const int http_utils::http_multi_status = MHD_HTTP_MULTI_STATUS;
const int http_utils::http_multiple_choices = MHD_HTTP_MULTIPLE_CHOICES;
const int http_utils::http_moved_permanently = MHD_HTTP_MOVED_PERMANENTLY;
const int http_utils::http_found = MHD_HTTP_FOUND;
const int http_utils::http_see_other = MHD_HTTP_SEE_OTHER;
const int http_utils::http_not_modified = MHD_HTTP_NOT_MODIFIED;
const int http_utils::http_use_proxy = MHD_HTTP_USE_PROXY;
const int http_utils::http_switch_proxy = MHD_HTTP_SWITCH_PROXY;
const int http_utils::http_temporary_redirect = MHD_HTTP_TEMPORARY_REDIRECT;
const int http_utils::http_bad_request = MHD_HTTP_BAD_REQUEST;
const int http_utils::http_unauthorized = MHD_HTTP_UNAUTHORIZED;
const int http_utils::http_payment_required = MHD_HTTP_PAYMENT_REQUIRED;
const int http_utils::http_forbidden = MHD_HTTP_FORBIDDEN;
const int http_utils::http_not_found = MHD_HTTP_NOT_FOUND;
const int http_utils::http_method_not_allowed = MHD_HTTP_METHOD_NOT_ALLOWED;
const int http_utils::http_method_not_acceptable = MHD_HTTP_NOT_ACCEPTABLE;
const int http_utils::http_proxy_authentication_required =
MHD_HTTP_PROXY_AUTHENTICATION_REQUIRED;
const int http_utils::http_request_timeout = MHD_HTTP_REQUEST_TIMEOUT;
const int http_utils::http_conflict = MHD_HTTP_CONFLICT;
const int http_utils::http_gone = MHD_HTTP_GONE;
const int http_utils::http_length_required = MHD_HTTP_LENGTH_REQUIRED;
const int http_utils::http_precondition_failed = MHD_HTTP_PRECONDITION_FAILED;
const int http_utils::http_request_entity_too_large =
MHD_HTTP_PAYLOAD_TOO_LARGE;
const int http_utils::http_request_uri_too_long = MHD_HTTP_URI_TOO_LONG;
const int http_utils::http_unsupported_media_type =
MHD_HTTP_UNSUPPORTED_MEDIA_TYPE;
const int http_utils::http_requested_range_not_satisfiable =
MHD_HTTP_RANGE_NOT_SATISFIABLE;
const int http_utils::http_expectation_failed = MHD_HTTP_EXPECTATION_FAILED;
const int http_utils::http_unprocessable_entity = MHD_HTTP_UNPROCESSABLE_ENTITY;
const int http_utils::http_locked = MHD_HTTP_LOCKED;
const int http_utils::http_failed_dependency = MHD_HTTP_FAILED_DEPENDENCY;
const int http_utils::http_unordered_collection = MHD_HTTP_UNORDERED_COLLECTION;
const int http_utils::http_upgrade_required = MHD_HTTP_UPGRADE_REQUIRED;
const int http_utils::http_retry_with = MHD_HTTP_RETRY_WITH;
const int http_utils::http_internal_server_error =
MHD_HTTP_INTERNAL_SERVER_ERROR;
const int http_utils::http_not_implemented = MHD_HTTP_NOT_IMPLEMENTED;
const int http_utils::http_bad_gateway = MHD_HTTP_BAD_GATEWAY;
const int http_utils::http_service_unavailable = MHD_HTTP_SERVICE_UNAVAILABLE;
const int http_utils::http_gateway_timeout = MHD_HTTP_GATEWAY_TIMEOUT;
const int http_utils::http_version_not_supported =
MHD_HTTP_HTTP_VERSION_NOT_SUPPORTED;
const int http_utils::http_variant_also_negotiated =
MHD_HTTP_VARIANT_ALSO_NEGOTIATES;
const int http_utils::http_insufficient_storage = MHD_HTTP_INSUFFICIENT_STORAGE;
const int http_utils::http_bandwidth_limit_exceeded =
MHD_HTTP_BANDWIDTH_LIMIT_EXCEEDED;
const int http_utils::http_not_extended = MHD_HTTP_NOT_EXTENDED;
const int http_utils::shoutcast_response = MHD_ICY_FLAG;
const std::string http_utils::http_header_accept = MHD_HTTP_HEADER_ACCEPT;
const std::string http_utils::http_header_accept_charset =
MHD_HTTP_HEADER_ACCEPT_CHARSET;
const std::string http_utils::http_header_accept_encoding =
MHD_HTTP_HEADER_ACCEPT_ENCODING;
const std::string http_utils::http_header_accept_language =
MHD_HTTP_HEADER_ACCEPT_LANGUAGE;
const std::string http_utils::http_header_accept_ranges =
MHD_HTTP_HEADER_ACCEPT_RANGES;
const std::string http_utils::http_header_age = MHD_HTTP_HEADER_AGE;
const std::string http_utils::http_header_allow = MHD_HTTP_HEADER_ALLOW;
const std::string http_utils::http_header_authorization =
MHD_HTTP_HEADER_AUTHORIZATION;
const std::string http_utils::http_header_cache_control =
MHD_HTTP_HEADER_CACHE_CONTROL;
const std::string http_utils::http_header_connection =
MHD_HTTP_HEADER_CONNECTION;
const std::string http_utils::http_header_content_encoding =
MHD_HTTP_HEADER_CONTENT_ENCODING;
const std::string http_utils::http_header_content_language =
MHD_HTTP_HEADER_CONTENT_LANGUAGE;
const std::string http_utils::http_header_content_length =
MHD_HTTP_HEADER_CONTENT_LENGTH;
const std::string http_utils::http_header_content_location =
MHD_HTTP_HEADER_CONTENT_LOCATION;
const std::string http_utils::http_header_content_md5 =
MHD_HTTP_HEADER_CONTENT_MD5;
const std::string http_utils::http_header_content_range =
MHD_HTTP_HEADER_CONTENT_RANGE;
const std::string http_utils::http_header_content_type =
MHD_HTTP_HEADER_CONTENT_TYPE;
const std::string http_utils::http_header_date = MHD_HTTP_HEADER_DATE;
const std::string http_utils::http_header_etag = MHD_HTTP_HEADER_ETAG;
const std::string http_utils::http_header_expect = MHD_HTTP_HEADER_EXPECT;
const std::string http_utils::http_header_expires = MHD_HTTP_HEADER_EXPIRES;
const std::string http_utils::http_header_from = MHD_HTTP_HEADER_FROM;
const std::string http_utils::http_header_host = MHD_HTTP_HEADER_HOST;
const std::string http_utils::http_header_if_match = MHD_HTTP_HEADER_IF_MATCH;
const std::string http_utils::http_header_if_modified_since =
MHD_HTTP_HEADER_IF_MODIFIED_SINCE;
const std::string http_utils::http_header_if_none_match =
MHD_HTTP_HEADER_IF_NONE_MATCH;
const std::string http_utils::http_header_if_range = MHD_HTTP_HEADER_IF_RANGE;
const std::string http_utils::http_header_if_unmodified_since =
MHD_HTTP_HEADER_IF_UNMODIFIED_SINCE;
const std::string http_utils::http_header_last_modified =
MHD_HTTP_HEADER_LAST_MODIFIED;
const std::string http_utils::http_header_location = MHD_HTTP_HEADER_LOCATION;
const std::string http_utils::http_header_max_forwards =
MHD_HTTP_HEADER_MAX_FORWARDS;
const std::string http_utils::http_header_pragma = MHD_HTTP_HEADER_PRAGMA;
const std::string http_utils::http_header_proxy_authenticate =
MHD_HTTP_HEADER_PROXY_AUTHENTICATE;
const std::string http_utils::http_header_proxy_authentication =
MHD_HTTP_HEADER_PROXY_AUTHORIZATION;
const std::string http_utils::http_header_range = MHD_HTTP_HEADER_RANGE;
const std::string http_utils::http_header_referer = MHD_HTTP_HEADER_REFERER;
const std::string http_utils::http_header_retry_after =
MHD_HTTP_HEADER_RETRY_AFTER;
const std::string http_utils::http_header_server = MHD_HTTP_HEADER_SERVER;
const std::string http_utils::http_header_te = MHD_HTTP_HEADER_TE;
const std::string http_utils::http_header_trailer = MHD_HTTP_HEADER_TRAILER;
const std::string http_utils::http_header_transfer_encoding =
MHD_HTTP_HEADER_TRANSFER_ENCODING;
const std::string http_utils::http_header_upgrade = MHD_HTTP_HEADER_UPGRADE;
const std::string http_utils::http_header_user_agent =
MHD_HTTP_HEADER_USER_AGENT;
const std::string http_utils::http_header_vary = MHD_HTTP_HEADER_VARY;
const std::string http_utils::http_header_via = MHD_HTTP_HEADER_VIA;
const std::string http_utils::http_header_warning = MHD_HTTP_HEADER_WARNING;
const std::string http_utils::http_header_www_authenticate =
MHD_HTTP_HEADER_WWW_AUTHENTICATE;
const std::string http_utils::http_version_1_0 = MHD_HTTP_VERSION_1_0;
const std::string http_utils::http_version_1_1 = MHD_HTTP_VERSION_1_1;
const std::string http_utils::http_method_connect = MHD_HTTP_METHOD_CONNECT;
const std::string http_utils::http_method_delete = MHD_HTTP_METHOD_DELETE;
const std::string http_utils::http_method_get = MHD_HTTP_METHOD_GET;
const std::string http_utils::http_method_head = MHD_HTTP_METHOD_HEAD;
const std::string http_utils::http_method_options = MHD_HTTP_METHOD_OPTIONS;
const std::string http_utils::http_method_post = MHD_HTTP_METHOD_POST;
const std::string http_utils::http_method_put = MHD_HTTP_METHOD_PUT;
const std::string http_utils::http_method_trace = MHD_HTTP_METHOD_TRACE;
const std::string http_utils::http_method_patch = MHD_HTTP_METHOD_PATCH;
const std::string http_utils::http_post_encoding_form_urlencoded =
MHD_HTTP_POST_ENCODING_FORM_URLENCODED;
const std::string http_utils::http_post_encoding_multipart_formdata =
MHD_HTTP_POST_ENCODING_MULTIPART_FORMDATA;
const std::string http_utils::text_plain = "text/plain";
std::vector<std::string> http_utils::tokenize_url(
const std::string& str,
const char separator
)
{
return string_utilities::string_split(str, separator);
}
std::string http_utils::standardize_url(const std::string& url)
{
std::string n_url = url;
std::string::iterator new_end = std::unique(n_url.begin(), n_url.end(), [](char a, char b) { return (a == b) && (a == '/'); });
n_url.erase(new_end, n_url.end());
std::string::size_type n_url_length = n_url.length();
std::string result;
if (n_url_length > 1 && n_url[n_url_length - 1] == '/')
{
result = n_url.substr(0, n_url_length - 1);
}
else
{
result = n_url;
}
return result;
}
std::string get_ip_str(const struct sockaddr *sa, socklen_t maxlen)
{
if (!sa) throw std::invalid_argument("socket pointer is null");
char to_ret[NI_MAXHOST];
if (AF_INET6 == sa->sa_family)
{
inet_ntop(AF_INET6, &(((sockaddr_in6*) sa)->sin6_addr), to_ret, INET6_ADDRSTRLEN);
return to_ret;
}
else if (AF_INET == sa->sa_family)
{
inet_ntop(AF_INET, &(((sockaddr_in*) sa)->sin_addr), to_ret, INET_ADDRSTRLEN);
return to_ret;
}
else
{
throw std::invalid_argument("IP family must be either AF_INET or AF_INET6");
}
}
unsigned short get_port(const struct sockaddr* sa)
{
if (!sa) throw std::invalid_argument("socket pointer is null");
if (sa->sa_family == AF_INET)
{
return ((struct sockaddr_in*) sa)->sin_port;
}
else if (sa->sa_family == AF_INET6)
{
return ((struct sockaddr_in6*) sa)->sin6_port;
}
else
{
throw std::invalid_argument("IP family must be either AF_INET or AF_INET6");
}
}
size_t http_unescape(std::string& val)
{
if (val.empty()) return 0;
int rpos = 0;
int wpos = 0;
unsigned int num;
while ('\0' != val[rpos])
{
switch (val[rpos])
{
case '+':
val[wpos] = ' ';
wpos++;
rpos++;
break;
case '%':
if ( (1 == sscanf (val.substr(rpos + 1).c_str(), "%2x", &num)) ||
(1 == sscanf (val.substr(rpos + 1).c_str(), "%2X", &num))
)
{
val[wpos] = (unsigned char) num;
wpos++;
rpos += 3;
break;
}
/* intentional fall through! */
default:
val[wpos] = val[rpos];
wpos++;
rpos++;
}
}
val[wpos] = '\0'; /* add 0-terminator */
val.resize(wpos);
return wpos; /* = strlen(val) */
}
ip_representation::ip_representation(const struct sockaddr* ip)
{
std::fill(pieces, pieces + 16, 0);
if(ip->sa_family == AF_INET)
{
ip_version = http_utils::IPV4;
for(int i=0;i<4;i++)
{
pieces[12+i]=((u_char*)&(((struct sockaddr_in *)ip)->sin_addr))[i];
}
}
else
{
ip_version = http_utils::IPV6;
for (int i = 0; i < 16; i++)
{
pieces[i] = ((u_char*)&(((struct sockaddr_in6 *)ip)->sin6_addr))[i];
}
}
mask = DEFAULT_MASK_VALUE;
}
ip_representation::ip_representation(const std::string& ip)
{
std::vector<std::string> parts;
mask = DEFAULT_MASK_VALUE;
std::fill(pieces, pieces + 16, 0);
if(ip.find(':') != std::string::npos) //IPV6
{
ip_version = http_utils::IPV6;
parts = string_utilities::string_split(ip, ':', false);
if (parts.size() > 8)
{
throw std::invalid_argument("IP is badly formatted. Max 8 parts in IPV6.");
}
unsigned int omitted = 8 - (parts.size() - 1);
if (omitted != 0)
{
int empty_count = 0;
for (unsigned int i = 0; i < parts.size(); i++)
{
if (parts[i].size() == 0) empty_count++;
}
if (empty_count > 1)
{
if (parts[parts.size() - 1].find(".") != std::string::npos) omitted -= 1;
if (empty_count == 2 && parts[0] == "" && parts[1] == "")
{
omitted += 1;
parts = std::vector<std::string>(parts.begin() + 1, parts.end());
}
else
{
throw std::invalid_argument("IP is badly formatted. Cannot have more than one omitted segment in IPV6.");
}
}
}
int y = 0;
for (unsigned int i = 0; i < parts.size(); i++)
{
if (parts[i] != "*")
{
if (parts[i].size() == 0)
{
for (unsigned int omitted_idx = 0; omitted_idx < omitted; omitted_idx++)
{
pieces[y] = 0;
pieces[y+1] = 0;
y += 2;
}
continue;
}
if (parts[i].size() < 4)
{
stringstream ss;
ss << setfill('0') << setw(4) << parts[i];
parts[i] = ss.str();
}
if (parts[i].size() == 4)
{
pieces[y] = strtol((parts[i].substr(0,2)).c_str(),NULL,16);
pieces[y+1] = strtol(
(parts[i].substr(2,2)).c_str(),
NULL,
16
);
y += 2;
}
else
{
if(parts[i].find('.') != std::string::npos)
{
if(y != 12)
{
throw std::invalid_argument("IP is badly formatted. Missing parts before nested IPV4.");
}
if (i != parts.size() - 1)
{
throw std::invalid_argument("IP is badly formatted. Nested IPV4 should be at the end");
}
vector<string> subparts = string_utilities::string_split(parts[i], '.');
if(subparts.size() == 4)
{
for (unsigned int k = 0; k < 10; k++)
{
if (pieces[k] != 0) throw std::invalid_argument("IP is badly formatted. Nested IPV4 can be preceded only by 0 (and, optionally, two 255 octects)");
}
if ((pieces[10] != 0 && pieces[10] != 255) || (pieces[11] != 0 && pieces[11] != 255))
{
throw std::invalid_argument("IP is badly formatted. Nested IPV4 can be preceded only by 0 (and, optionally, two 255 octects)");
}
for(unsigned int ii = 0; ii < subparts.size(); ii++)
{
if(subparts[ii] != "*")
{
pieces[y+ii] = strtol(
subparts[ii].c_str(),
NULL,
10
);
if (pieces[y+ii] > 255) throw std::invalid_argument("IP is badly formatted. 255 is max value for ip part.");
}
else
{
CLEAR_BIT(mask, y+ii);
}
}
}
else
{
throw std::invalid_argument("IP is badly formatted. Nested IPV4 can have max 4 parts.");
}
}
else
{
throw std::invalid_argument("IP is badly formatted. IPV6 parts can have max 4 characters (or nest an IPV4)");
}
}
}
else
{
CLEAR_BIT(mask, y);
CLEAR_BIT(mask, y+1);
y+=2;
}
}
}
else //IPV4
{
ip_version = http_utils::IPV4;
parts = string_utilities::string_split(ip, '.');
if(parts.size() == 4)
{
for(unsigned int i = 0; i < parts.size(); i++)
{
if(parts[i] != "*")
{
pieces[12+i] = strtol(parts[i].c_str(), NULL, 10);
if (pieces[12+i] > 255) throw std::invalid_argument("IP is badly formatted. 255 is max value for ip part.");
}
else
{
CLEAR_BIT(mask, 12+i);
}
}
}
else
{
throw std::invalid_argument("IP is badly formatted. Max 4 parts in IPV4.");
}
}
}
bool ip_representation::operator <(const ip_representation& b) const
{
long this_score = 0;
long b_score = 0;
for (int i = 0; i < 16; i++)
{
if (i == 10 || i == 11) continue;
if (CHECK_BIT(this->mask, i) && CHECK_BIT(b.mask, i))
{
this_score += (16 - i) * this->pieces[i];
b_score += (16 - i) * b.pieces[i];
}
}
if (this_score == b_score &&
((this->pieces[10] == 0x00 || this->pieces[10] == 0xFF) && (b.pieces[10] == 0x00 || b.pieces[10] == 0xFF)) &&
((this->pieces[11] == 0x00 || this->pieces[11] == 0xFF) && (b.pieces[11] == 0x00 || b.pieces[11] == 0xFF))
)
{
return false;
}
for (int i = 10; i < 12; i++)
{
if (CHECK_BIT(this->mask, i) && CHECK_BIT(b.mask, i))
{
this_score += (16 - i) * this->pieces[i];
b_score += (16 - i) * b.pieces[i];
}
}
return this_score < b_score;
}
const std::string load_file (const std::string& filename)
{
ifstream fp(filename.c_str(), ios::in | ios::binary | ios::ate);
if(fp.is_open())
{
std::string content;
fp.seekg(0, fp.end);
content.reserve(fp.tellg());
fp.seekg(0, fp.beg);
content.assign((std::istreambuf_iterator<char>(fp)), std::istreambuf_iterator<char>());
return content;
}
else
{
throw std::invalid_argument("Unable to open file");
}
}
void dump_header_map(std::ostream &os, const std::string &prefix,
const std::map<std::string,std::string,header_comparator> &map)
{
std::map<std::string,std::string,header_comparator>::const_iterator it = map.begin();
std::map<std::string,std::string,header_comparator>::const_iterator end = map.end();
if (map.size()) {
os << " " << prefix << " [";
for (; it != end; ++it) {
os << (*it).first << ":\"" << (*it).second << "\" ";
}
os << "]" << std::endl;
}
}
void dump_arg_map(std::ostream &os, const std::string &prefix,
const std::map<std::string,std::string,arg_comparator> &map)
{
std::map<std::string,std::string,arg_comparator>::const_iterator it = map.begin();
std::map<std::string,std::string,arg_comparator>::const_iterator end = map.end();
if (map.size()) {
os << " " << prefix << " [";
for (; it != end; ++it) {
os << (*it).first << ":\"" << (*it).second << "\" ";
}
os << "]" << std::endl;
}
}
size_t base_unescaper(std::string& s, unescaper_ptr unescaper)
{
if(s[0] == 0) return 0;
if(unescaper != 0x0)
{
unescaper(s);
return s.size();
}
return http_unescape(s);
}
};
};
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