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monero/contrib/epee/include/net/http_client.h
Martijn Otto 057c279cb4
epee: add SSL support 
RPC connections now have optional tranparent SSL.

An optional private key and certificate file can be passed,
using the --{rpc,daemon}-ssl-private-key and
--{rpc,daemon}-ssl-certificate options. Those have as
argument a path to a PEM format private private key and
certificate, respectively.
If not given, a temporary self signed certificate will be used.

SSL can be enabled or disabled using --{rpc}-ssl, which
accepts autodetect (default), disabled or enabled.

Access can be restricted to particular certificates using the
--rpc-ssl-allowed-certificates, which takes a list of
paths to PEM encoded certificates. This can allow a wallet to
connect to only the daemon they think they're connected to,
by forcing SSL and listing the paths to the known good
certificates.

To generate long term certificates:

openssl genrsa -out /tmp/KEY 4096
openssl req -new -key /tmp/KEY -out /tmp/REQ
openssl x509 -req -days 999999 -sha256 -in /tmp/REQ -signkey /tmp/KEY -out /tmp/CERT

/tmp/KEY is the private key, and /tmp/CERT is the certificate,
both in PEM format. /tmp/REQ can be removed. Adjust the last
command to set expiration date, etc, as needed. It doesn't
make a whole lot of sense for monero anyway, since most servers
will run with one time temporary self signed certificates anyway.

SSL support is transparent, so all communication is done on the
existing ports, with SSL autodetection. This means you can start
using an SSL daemon now, but you should not enforce SSL yet or
nothing will talk to you.
2019-03-05 14:16:08 +01:00

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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// * Neither the name of the Andrey N. Sabelnikov nor the
// names of its contributors may be used to endorse or promote products
// derived from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
#pragma once
#include <ctype.h>
#include <boost/shared_ptr.hpp>
#include <boost/regex.hpp>
#include <boost/lexical_cast.hpp>
#include <boost/optional/optional.hpp>
#include <boost/utility/string_ref.hpp>
//#include <mbstring.h>
#include <algorithm>
#include <cctype>
#include <functional>
#include "net_helper.h"
#include "http_client_base.h"
#ifdef HTTP_ENABLE_GZIP
#include "gzip_encoding.h"
#endif
#include "string_tools.h"
#include "reg_exp_definer.h"
#include "http_base.h"
#include "http_auth.h"
#include "to_nonconst_iterator.h"
#include "net_parse_helpers.h"
#include "syncobj.h"
//#include "shlwapi.h"
//#pragma comment(lib, "shlwapi.lib")
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net.http"
extern epee::critical_section gregexp_lock;
namespace epee
{
namespace net_utils
{
/*struct url
{
public:
void parse(const std::string& url_s)
{
const string prot_end("://");
string::const_iterator prot_i = search(url_s.begin(), url_s.end(),
prot_end.begin(), prot_end.end());
protocol_.reserve(distance(url_s.begin(), prot_i));
transform(url_s.begin(), prot_i,
back_inserter(protocol_),
ptr_fun<int,int>(tolower)); // protocol is icase
if( prot_i == url_s.end() )
return;
advance(prot_i, prot_end.length());
string::const_iterator path_i = find(prot_i, url_s.end(), '/');
host_.reserve(distance(prot_i, path_i));
transform(prot_i, path_i,
back_inserter(host_),
ptr_fun<int,int>(tolower)); // host is icase
string::const_iterator query_i = find(path_i, url_s.end(), '?');
path_.assign(path_i, query_i);
if( query_i != url_s.end() )
++query_i;
query_.assign(query_i, url_s.end());
}
std::string protocol_;
std::string host_;
std::string path_;
std::string query_;
};*/
//---------------------------------------------------------------------------
static inline const char* get_hex_vals()
{
static const char hexVals[16] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
return hexVals;
}
static inline const char* get_unsave_chars()
{
//static char unsave_chars[] = "\"<>%\\^[]`+$,@:;/!#?=&";
static const char unsave_chars[] = "\"<>%\\^[]`+$,@:;!#&";
return unsave_chars;
}
static inline bool is_unsafe(unsigned char compare_char)
{
if(compare_char <= 32 || compare_char >= 123)
return true;
const char* punsave = get_unsave_chars();
for(int ichar_pos = 0; 0!=punsave[ichar_pos] ;ichar_pos++)
if(compare_char == punsave[ichar_pos])
return true;
return false;
}
static inline
std::string dec_to_hex(char num, int radix)
{
int temp=0;
std::string csTmp;
int num_char;
num_char = (int) num;
if (num_char < 0)
num_char = 256 + num_char;
while (num_char >= radix)
{
temp = num_char % radix;
num_char = (int)floor((float)num_char / (float)radix);
csTmp = get_hex_vals()[temp];
}
csTmp += get_hex_vals()[num_char];
if(csTmp.size() < 2)
{
csTmp += '0';
}
std::reverse(csTmp.begin(), csTmp.end());
//_mbsrev((unsigned char*)csTmp.data());
return csTmp;
}
static inline int get_index(const char *s, char c) { const char *ptr = (const char*)memchr(s, c, 16); return ptr ? ptr-s : -1; }
static inline
std::string hex_to_dec_2bytes(const char *s)
{
const char *hex = get_hex_vals();
int i0 = get_index(hex, toupper(s[0]));
int i1 = get_index(hex, toupper(s[1]));
if (i0 < 0 || i1 < 0)
return std::string("%") + std::string(1, s[0]) + std::string(1, s[1]);
return std::string(1, i0 * 16 | i1);
}
static inline std::string convert(char val)
{
std::string csRet;
csRet += "%";
csRet += dec_to_hex(val, 16);
return csRet;
}
static inline std::string conver_to_url_format(const std::string& uri)
{
std::string result;
for(size_t i = 0; i!= uri.size(); i++)
{
if(is_unsafe(uri[i]))
result += convert(uri[i]);
else
result += uri[i];
}
return result;
}
static inline std::string convert_from_url_format(const std::string& uri)
{
std::string result;
for(size_t i = 0; i!= uri.size(); i++)
{
if(uri[i] == '%' && i + 2 < uri.size())
{
result += hex_to_dec_2bytes(uri.c_str() + i + 1);
i += 2;
}
else
result += uri[i];
}
return result;
}
static inline std::string convert_to_url_format_force_all(const std::string& uri)
{
std::string result;
for(size_t i = 0; i!= uri.size(); i++)
{
result += convert(uri[i]);
}
return result;
}
namespace http
{
template<typename net_client_type>
class http_simple_client_template: public i_target_handler
{
private:
enum reciev_machine_state
{
reciev_machine_state_header,
reciev_machine_state_body_content_len,
reciev_machine_state_body_connection_close,
reciev_machine_state_body_chunked,
reciev_machine_state_done,
reciev_machine_state_error
};
enum chunked_state{
http_chunked_state_chunk_head,
http_chunked_state_chunk_body,
http_chunked_state_done,
http_chunked_state_undefined
};
net_client_type m_net_client;
std::string m_host_buff;
std::string m_port;
http_client_auth m_auth;
std::string m_header_cache;
http_response_info m_response_info;
size_t m_len_in_summary;
size_t m_len_in_remain;
//std::string* m_ptarget_buffer;
boost::shared_ptr<i_sub_handler> m_pcontent_encoding_handler;
reciev_machine_state m_state;
chunked_state m_chunked_state;
std::string m_chunked_cache;
critical_section m_lock;
epee::net_utils::ssl_support_t m_ssl_support;
std::pair<std::string, std::string> m_ssl_private_key_and_certificate_path;
std::list<std::string> m_ssl_allowed_certificates;
std::vector<std::vector<uint8_t>> m_ssl_allowed_fingerprints;
bool m_ssl_allow_any_cert;
public:
explicit http_simple_client_template()
: i_target_handler()
, m_net_client()
, m_host_buff()
, m_port()
, m_auth()
, m_header_cache()
, m_response_info()
, m_len_in_summary(0)
, m_len_in_remain(0)
, m_pcontent_encoding_handler(nullptr)
, m_state()
, m_chunked_state()
, m_chunked_cache()
, m_lock()
, m_ssl_support(epee::net_utils::ssl_support_t::e_ssl_support_autodetect)
{}
const std::string &get_host() const { return m_host_buff; };
const std::string &get_port() const { return m_port; };
bool set_server(const std::string& address, boost::optional<login> user, epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, const std::list<std::string> &allowed_ssl_certificates = {}, const std::vector<std::vector<uint8_t>> &allowed_ssl_fingerprints = {}, bool allow_any_cert = false)
{
http::url_content parsed{};
const bool r = parse_url(address, parsed);
CHECK_AND_ASSERT_MES(r, false, "failed to parse url: " << address);
set_server(std::move(parsed.host), std::to_string(parsed.port), std::move(user), ssl_support, private_key_and_certificate_path, allowed_ssl_certificates, allowed_ssl_fingerprints, allow_any_cert);
return true;
}
void set_server(std::string host, std::string port, boost::optional<login> user, epee::net_utils::ssl_support_t ssl_support = epee::net_utils::ssl_support_t::e_ssl_support_autodetect, const std::pair<std::string, std::string> &private_key_and_certificate_path = {}, const std::list<std::string> &allowed_ssl_certificates = {}, const std::vector<std::vector<uint8_t>> &allowed_ssl_fingerprints = {}, bool allow_any_cert = false)
{
CRITICAL_REGION_LOCAL(m_lock);
disconnect();
m_host_buff = std::move(host);
m_port = std::move(port);
m_auth = user ? http_client_auth{std::move(*user)} : http_client_auth{};
m_ssl_support = ssl_support;
m_ssl_private_key_and_certificate_path = private_key_and_certificate_path;
m_ssl_allowed_certificates = allowed_ssl_certificates;
m_ssl_allowed_fingerprints = allowed_ssl_fingerprints;
m_ssl_allow_any_cert = allow_any_cert;
m_net_client.set_ssl(m_ssl_support, m_ssl_private_key_and_certificate_path, m_ssl_allowed_certificates, m_ssl_allowed_fingerprints, m_ssl_allow_any_cert);
}
bool connect(std::chrono::milliseconds timeout)
{
CRITICAL_REGION_LOCAL(m_lock);
return m_net_client.connect(m_host_buff, m_port, timeout, "0.0.0.0");
}
//---------------------------------------------------------------------------
bool disconnect()
{
CRITICAL_REGION_LOCAL(m_lock);
return m_net_client.disconnect();
}
//---------------------------------------------------------------------------
bool is_connected(bool *ssl = NULL)
{
CRITICAL_REGION_LOCAL(m_lock);
return m_net_client.is_connected(ssl);
}
//---------------------------------------------------------------------------
virtual bool handle_target_data(std::string& piece_of_transfer)
{
CRITICAL_REGION_LOCAL(m_lock);
m_response_info.m_body += piece_of_transfer;
piece_of_transfer.clear();
return true;
}
//---------------------------------------------------------------------------
virtual bool on_header(const http_response_info &headers)
{
return true;
}
//---------------------------------------------------------------------------
inline
bool invoke_get(const boost::string_ref uri, std::chrono::milliseconds timeout, const std::string& body = std::string(), const http_response_info** ppresponse_info = NULL, const fields_list& additional_params = fields_list())
{
CRITICAL_REGION_LOCAL(m_lock);
return invoke(uri, "GET", body, timeout, ppresponse_info, additional_params);
}
//---------------------------------------------------------------------------
inline bool invoke(const boost::string_ref uri, const boost::string_ref method, const std::string& body, std::chrono::milliseconds timeout, const http_response_info** ppresponse_info = NULL, const fields_list& additional_params = fields_list())
{
CRITICAL_REGION_LOCAL(m_lock);
if(!is_connected())
{
MDEBUG("Reconnecting...");
if(!connect(timeout))
{
MDEBUG("Failed to connect to " << m_host_buff << ":" << m_port);
return false;
}
}
std::string req_buff{};
req_buff.reserve(2048);
req_buff.append(method.data(), method.size()).append(" ").append(uri.data(), uri.size()).append(" HTTP/1.1\r\n");
add_field(req_buff, "Host", m_host_buff);
add_field(req_buff, "Content-Length", std::to_string(body.size()));
//handle "additional_params"
for(const auto& field : additional_params)
add_field(req_buff, field);
for (unsigned sends = 0; sends < 2; ++sends)
{
const std::size_t initial_size = req_buff.size();
const auto auth = m_auth.get_auth_field(method, uri);
if (auth)
add_field(req_buff, *auth);
req_buff += "\r\n";
//--
bool res = m_net_client.send(req_buff, timeout);
CHECK_AND_ASSERT_MES(res, false, "HTTP_CLIENT: Failed to SEND");
if(body.size())
res = m_net_client.send(body, timeout);
CHECK_AND_ASSERT_MES(res, false, "HTTP_CLIENT: Failed to SEND");
m_response_info.clear();
m_state = reciev_machine_state_header;
if (!handle_reciev(timeout))
return false;
if (m_response_info.m_response_code != 401)
{
if(ppresponse_info)
*ppresponse_info = std::addressof(m_response_info);
return true;
}
switch (m_auth.handle_401(m_response_info))
{
case http_client_auth::kSuccess:
break;
case http_client_auth::kBadPassword:
sends = 2;
break;
default:
case http_client_auth::kParseFailure:
LOG_ERROR("Bad server response for authentication");
return false;
}
req_buff.resize(initial_size); // rollback for new auth generation
}
LOG_ERROR("Client has incorrect username/password for server requiring authentication");
return false;
}
//---------------------------------------------------------------------------
inline bool invoke_post(const boost::string_ref uri, const std::string& body, std::chrono::milliseconds timeout, const http_response_info** ppresponse_info = NULL, const fields_list& additional_params = fields_list())
{
CRITICAL_REGION_LOCAL(m_lock);
return invoke(uri, "POST", body, timeout, ppresponse_info, additional_params);
}
//---------------------------------------------------------------------------
bool test(const std::string &s, std::chrono::milliseconds timeout) // TEST FUNC ONLY
{
CRITICAL_REGION_LOCAL(m_lock);
m_net_client.set_test_data(s);
m_state = reciev_machine_state_header;
return handle_reciev(timeout);
}
//---------------------------------------------------------------------------
private:
//---------------------------------------------------------------------------
inline bool handle_reciev(std::chrono::milliseconds timeout)
{
CRITICAL_REGION_LOCAL(m_lock);
bool keep_handling = true;
bool need_more_data = true;
std::string recv_buffer;
while(keep_handling)
{
if(need_more_data)
{
if(!m_net_client.recv(recv_buffer, timeout))
{
MERROR("Unexpected recv fail");
m_state = reciev_machine_state_error;
}
if(!recv_buffer.size())
{
//connection is going to be closed
if(reciev_machine_state_body_connection_close != m_state)
{
m_state = reciev_machine_state_error;
}
}
need_more_data = false;
}
switch(m_state)
{
case reciev_machine_state_header:
keep_handling = handle_header(recv_buffer, need_more_data);
break;
case reciev_machine_state_body_content_len:
keep_handling = handle_body_content_len(recv_buffer, need_more_data);
break;
case reciev_machine_state_body_connection_close:
keep_handling = handle_body_connection_close(recv_buffer, need_more_data);
break;
case reciev_machine_state_body_chunked:
keep_handling = handle_body_body_chunked(recv_buffer, need_more_data);
break;
case reciev_machine_state_done:
keep_handling = false;
break;
case reciev_machine_state_error:
keep_handling = false;
break;
}
}
m_header_cache.clear();
if(m_state != reciev_machine_state_error)
{
if(m_response_info.m_header_info.m_connection.size() && !string_tools::compare_no_case("close", m_response_info.m_header_info.m_connection))
disconnect();
return true;
}
else
{
LOG_PRINT_L3("Returning false because of wrong state machine. state: " << m_state);
return false;
}
}
//---------------------------------------------------------------------------
inline
bool handle_header(std::string& recv_buff, bool& need_more_data)
{
CRITICAL_REGION_LOCAL(m_lock);
if(!recv_buff.size())
{
LOG_ERROR("Connection closed at handle_header");
m_state = reciev_machine_state_error;
return false;
}
m_header_cache += recv_buff;
recv_buff.clear();
std::string::size_type pos = m_header_cache.find("\r\n\r\n");
if(pos != std::string::npos)
{
recv_buff.assign(m_header_cache.begin()+pos+4, m_header_cache.end());
m_header_cache.erase(m_header_cache.begin()+pos+4, m_header_cache.end());
analize_cached_header_and_invoke_state();
if (!on_header(m_response_info))
{
MDEBUG("Connection cancelled by on_header");
m_state = reciev_machine_state_done;
return false;
}
m_header_cache.clear();
if(!recv_buff.size() && (m_state != reciev_machine_state_error && m_state != reciev_machine_state_done))
need_more_data = true;
return true;
}else
need_more_data = true;
return true;
}
//---------------------------------------------------------------------------
inline
bool handle_body_content_len(std::string& recv_buff, bool& need_more_data)
{
CRITICAL_REGION_LOCAL(m_lock);
if(!recv_buff.size())
{
MERROR("Warning: Content-Len mode, but connection unexpectedly closed");
m_state = reciev_machine_state_done;
return true;
}
CHECK_AND_ASSERT_MES(m_len_in_remain >= recv_buff.size(), false, "m_len_in_remain >= recv_buff.size()");
m_len_in_remain -= recv_buff.size();
if (!m_pcontent_encoding_handler->update_in(recv_buff))
{
m_state = reciev_machine_state_done;
return false;
}
if(m_len_in_remain == 0)
m_state = reciev_machine_state_done;
else
need_more_data = true;
return true;
}
//---------------------------------------------------------------------------
inline
bool handle_body_connection_close(std::string& recv_buff, bool& need_more_data)
{
CRITICAL_REGION_LOCAL(m_lock);
if(!recv_buff.size())
{
m_state = reciev_machine_state_done;
return true;
}
need_more_data = true;
m_pcontent_encoding_handler->update_in(recv_buff);
return true;
}
//---------------------------------------------------------------------------
inline bool is_hex_symbol(char ch)
{
if( (ch >= '0' && ch <='9')||(ch >= 'A' && ch <='F')||(ch >= 'a' && ch <='f'))
return true;
else
return false;
}
//---------------------------------------------------------------------------
inline
bool get_len_from_chunk_head(const std::string &chunk_head, size_t& result_size)
{
std::stringstream str_stream;
str_stream << std::hex;
if(!(str_stream << chunk_head && str_stream >> result_size))
return false;
return true;
}
//---------------------------------------------------------------------------
inline
bool get_chunk_head(std::string& buff, size_t& chunk_size, bool& is_matched)
{
is_matched = false;
size_t offset = 0;
for(std::string::iterator it = buff.begin(); it!= buff.end(); it++, offset++)
{
if(!is_hex_symbol(*it))
{
if(*it == '\r' || *it == ' ' )
{
offset--;
continue;
}
else if(*it == '\n')
{
std::string chunk_head = buff.substr(0, offset);
if(!get_len_from_chunk_head(chunk_head, chunk_size))
return false;
if(0 == chunk_size)
{
//Here is a small confusion
//In brief - if the chunk is the last one we need to get terminating sequence
//along with the cipher, generally in the "ddd\r\n\r\n" form
for(it++;it != buff.end(); it++)
{
if('\r' == *it)
continue;
else if('\n' == *it)
break;
else
{
LOG_ERROR("http_stream_filter: Wrong last chunk terminator");
return false;
}
}
if(it == buff.end())
return true;
}
buff.erase(buff.begin(), ++it);
is_matched = true;
return true;
}
else
return false;
}
}
return true;
}
//---------------------------------------------------------------------------
inline
bool handle_body_body_chunked(std::string& recv_buff, bool& need_more_data)
{
CRITICAL_REGION_LOCAL(m_lock);
if(!recv_buff.size())
{
MERROR("Warning: CHUNKED mode, but connection unexpectedly closed");
m_state = reciev_machine_state_done;
return true;
}
m_chunked_cache += recv_buff;
recv_buff.clear();
bool is_matched = false;
while(true)
{
if(!m_chunked_cache.size())
{
need_more_data = true;
break;
}
switch(m_chunked_state)
{
case http_chunked_state_chunk_head:
if(m_chunked_cache[0] == '\n' || m_chunked_cache[0] == '\r')
{
//optimize a bit
if(m_chunked_cache[0] == '\r' && m_chunked_cache.size()>1 && m_chunked_cache[1] == '\n')
m_chunked_cache.erase(0, 2);
else
m_chunked_cache.erase(0, 1);
break;
}
if(!get_chunk_head(m_chunked_cache, m_len_in_remain, is_matched))
{
LOG_ERROR("http_stream_filter::handle_chunked(*) Failed to get length from chunked head:" << m_chunked_cache);
m_state = reciev_machine_state_error;
return false;
}
if(!is_matched)
{
need_more_data = true;
return true;
}else
{
m_chunked_state = http_chunked_state_chunk_body;
if(m_len_in_remain == 0)
{//last chunk, let stop the stream and fix the chunk queue.
m_state = reciev_machine_state_done;
return true;
}
m_chunked_state = http_chunked_state_chunk_body;
break;
}
break;
case http_chunked_state_chunk_body:
{
std::string chunk_body;
if(m_len_in_remain >= m_chunked_cache.size())
{
m_len_in_remain -= m_chunked_cache.size();
chunk_body.swap(m_chunked_cache);
}else
{
chunk_body.assign(m_chunked_cache, 0, m_len_in_remain);
m_chunked_cache.erase(0, m_len_in_remain);
m_len_in_remain = 0;
}
if (!m_pcontent_encoding_handler->update_in(chunk_body))
{
m_state = reciev_machine_state_error;
return false;
}
if(!m_len_in_remain)
m_chunked_state = http_chunked_state_chunk_head;
}
break;
case http_chunked_state_done:
m_state = reciev_machine_state_done;
return true;
case http_chunked_state_undefined:
default:
LOG_ERROR("http_stream_filter::handle_chunked(): Wrong state" << m_chunked_state);
return false;
}
}
return true;
}
//---------------------------------------------------------------------------
inline bool parse_header(http_header_info& body_info, const std::string& m_cache_to_process)
{
MTRACE("http_stream_filter::parse_cached_header(*)");
const char *ptr = m_cache_to_process.c_str();
while (ptr[0] != '\r' || ptr[1] != '\n')
{
// optional \n
if (*ptr == '\n')
++ptr;
// an identifier composed of letters or -
const char *key_pos = ptr;
while (isalnum(*ptr) || *ptr == '_' || *ptr == '-')
++ptr;
const char *key_end = ptr;
// optional space (not in RFC, but in previous code)
if (*ptr == ' ')
++ptr;
CHECK_AND_ASSERT_MES(*ptr == ':', true, "http_stream_filter::parse_cached_header() invalid header in: " << m_cache_to_process);
++ptr;
// optional whitespace, but not newlines - line folding is obsolete, let's ignore it
while (isblank(*ptr))
++ptr;
const char *value_pos = ptr;
while (*ptr != '\r' && *ptr != '\n')
++ptr;
const char *value_end = ptr;
// optional trailing whitespace
while (value_end > value_pos && isblank(*(value_end-1)))
--value_end;
if (*ptr == '\r')
++ptr;
CHECK_AND_ASSERT_MES(*ptr == '\n', true, "http_stream_filter::parse_cached_header() invalid header in: " << m_cache_to_process);
++ptr;
const std::string key = std::string(key_pos, key_end - key_pos);
const std::string value = std::string(value_pos, value_end - value_pos);
if (!key.empty())
{
if (!string_tools::compare_no_case(key, "Connection"))
body_info.m_connection = value;
else if(!string_tools::compare_no_case(key, "Referrer"))
body_info.m_referer = value;
else if(!string_tools::compare_no_case(key, "Content-Length"))
body_info.m_content_length = value;
else if(!string_tools::compare_no_case(key, "Content-Type"))
body_info.m_content_type = value;
else if(!string_tools::compare_no_case(key, "Transfer-Encoding"))
body_info.m_transfer_encoding = value;
else if(!string_tools::compare_no_case(key, "Content-Encoding"))
body_info.m_content_encoding = value;
else if(!string_tools::compare_no_case(key, "Host"))
body_info.m_host = value;
else if(!string_tools::compare_no_case(key, "Cookie"))
body_info.m_cookie = value;
else if(!string_tools::compare_no_case(key, "User-Agent"))
body_info.m_user_agent = value;
else if(!string_tools::compare_no_case(key, "Origin"))
body_info.m_origin = value;
else
body_info.m_etc_fields.emplace_back(key, value);
}
}
return true;
}
//---------------------------------------------------------------------------
inline bool analize_first_response_line()
{
//First line response, look like this: "HTTP/1.1 200 OK"
const char *ptr = m_header_cache.c_str();
CHECK_AND_ASSERT_MES(!memcmp(ptr, "HTTP/", 5), false, "Invalid first response line: " + m_header_cache);
ptr += 5;
CHECK_AND_ASSERT_MES(isdigit(*ptr), false, "Invalid first response line: " + m_header_cache);
unsigned long ul;
char *end;
ul = strtoul(ptr, &end, 10);
CHECK_AND_ASSERT_MES(ul <= INT_MAX && *end =='.', false, "Invalid first response line: " + m_header_cache);
m_response_info.m_http_ver_hi = ul;
ptr = end + 1;
CHECK_AND_ASSERT_MES(isdigit(*ptr), false, "Invalid first response line: " + m_header_cache + ", ptr: " << ptr);
ul = strtoul(ptr, &end, 10);
CHECK_AND_ASSERT_MES(ul <= INT_MAX && isblank(*end), false, "Invalid first response line: " + m_header_cache + ", ptr: " << ptr);
m_response_info.m_http_ver_lo = ul;
ptr = end + 1;
while (isblank(*ptr))
++ptr;
CHECK_AND_ASSERT_MES(isdigit(*ptr), false, "Invalid first response line: " + m_header_cache);
ul = strtoul(ptr, &end, 10);
CHECK_AND_ASSERT_MES(ul >= 100 && ul <= 999 && isspace(*end), false, "Invalid first response line: " + m_header_cache);
m_response_info.m_response_code = ul;
ptr = end;
// ignore the optional text, till the end
while (*ptr != '\r' && *ptr != '\n')
++ptr;
if (*ptr == '\r')
++ptr;
CHECK_AND_ASSERT_MES(*ptr == '\n', false, "Invalid first response line: " << m_header_cache);
++ptr;
m_header_cache.erase(0, ptr - m_header_cache.c_str());
return true;
}
inline
bool set_reply_content_encoder()
{
STATIC_REGEXP_EXPR_1(rexp_match_gzip, "^.*?((gzip)|(deflate))", boost::regex::icase | boost::regex::normal);
boost::smatch result; // 12 3
if(boost::regex_search( m_response_info.m_header_info.m_content_encoding, result, rexp_match_gzip, boost::match_default) && result[0].matched)
{
#ifdef HTTP_ENABLE_GZIP
m_pcontent_encoding_handler.reset(new content_encoding_gzip(this, result[3].matched));
#else
m_pcontent_encoding_handler.reset(new do_nothing_sub_handler(this));
LOG_ERROR("GZIP encoding not supported in this build, please add zlib to your project and define HTTP_ENABLE_GZIP");
return false;
#endif
}
else
{
m_pcontent_encoding_handler.reset(new do_nothing_sub_handler(this));
}
return true;
}
inline
bool analize_cached_header_and_invoke_state()
{
m_response_info.clear();
analize_first_response_line();
std::string fake_str; //gcc error workaround
bool res = parse_header(m_response_info.m_header_info, m_header_cache);
CHECK_AND_ASSERT_MES(res, false, "http_stream_filter::analize_cached_reply_header_and_invoke_state(): failed to anilize reply header: " << m_header_cache);
set_reply_content_encoder();
m_len_in_summary = 0;
bool content_len_valid = false;
if(m_response_info.m_header_info.m_content_length.size())
content_len_valid = string_tools::get_xtype_from_string(m_len_in_summary, m_response_info.m_header_info.m_content_length);
if(!m_len_in_summary && ((m_response_info.m_response_code>=100&&m_response_info.m_response_code<200)
|| 204 == m_response_info.m_response_code
|| 304 == m_response_info.m_response_code) )
{//There will be no response body, server will display the local page with error
m_state = reciev_machine_state_done;
return true;
}else if(m_response_info.m_header_info.m_transfer_encoding.size())
{
string_tools::trim(m_response_info.m_header_info.m_transfer_encoding);
if(string_tools::compare_no_case(m_response_info.m_header_info.m_transfer_encoding, "chunked"))
{
LOG_ERROR("Wrong Transfer-Encoding:" << m_response_info.m_header_info.m_transfer_encoding);
m_state = reciev_machine_state_error;
return false;
}
m_state = reciev_machine_state_body_chunked;
m_chunked_state = http_chunked_state_chunk_head;
return true;
}
else if(!m_response_info.m_header_info.m_content_length.empty())
{
//In the response header the length was specified
if(!content_len_valid)
{
LOG_ERROR("http_stream_filter::analize_cached_reply_header_and_invoke_state(): Failed to get_len_from_content_lenght();, m_query_info.m_content_length="<<m_response_info.m_header_info.m_content_length);
m_state = reciev_machine_state_error;
return false;
}
if(!m_len_in_summary)
{
m_state = reciev_machine_state_done;
return true;
}
else
{
m_len_in_remain = m_len_in_summary;
m_state = reciev_machine_state_body_content_len;
return true;
}
}else if(!m_response_info.m_header_info.m_connection.empty() && is_connection_close_field(m_response_info.m_header_info.m_connection))
{ //By indirect signs we suspect that data transfer will end with a connection break
m_state = reciev_machine_state_body_connection_close;
}else if(is_multipart_body(m_response_info.m_header_info, fake_str))
{
m_state = reciev_machine_state_error;
LOG_ERROR("Unsupported MULTIPART BODY.");
return false;
}else
{ //Apparently there are no signs of the form of transfer, will receive data until the connection is closed
m_state = reciev_machine_state_error;
MERROR("Undefined transfer type, consider http_body_transfer_connection_close method. header: " << m_header_cache);
return false;
}
return false;
}
inline
bool is_connection_close_field(const std::string& str)
{
STATIC_REGEXP_EXPR_1(rexp_match_close, "^\\s*close", boost::regex::icase | boost::regex::normal);
boost::smatch result;
if(boost::regex_search( str, result, rexp_match_close, boost::match_default) && result[0].matched)
return true;
else
return false;
}
inline
bool is_multipart_body(const http_header_info& head_info, OUT std::string& boundary)
{
//Check whether this is multi part - if yes, capture boundary immediately
STATIC_REGEXP_EXPR_1(rexp_match_multipart_type, "^\\s*multipart/([\\w\\-]+); boundary=((\"(.*?)\")|(\\\\\"(.*?)\\\\\")|([^\\s;]*))", boost::regex::icase | boost::regex::normal);
boost::smatch result;
if(boost::regex_search(head_info.m_content_type, result, rexp_match_multipart_type, boost::match_default) && result[0].matched)
{
if(result[4].matched)
boundary = result[4];
else if(result[6].matched)
boundary = result[6];
else if(result[7].matched)
boundary = result[7];
else
{
LOG_ERROR("Failed to match boundary in content-type=" << head_info.m_content_type);
return false;
}
return true;
}
else
return false;
return true;
}
};
typedef http_simple_client_template<blocked_mode_client> http_simple_client;
}
}
}
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