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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.
//
#include <boost/regex.hpp>
#include <boost/lexical_cast.hpp>
#include "http_protocol_handler.h"
#include "reg_exp_definer.h"
#include "string_tools.h"
#include "file_io_utils.h"
#include "net_parse_helpers.h"
#define HTTP_MAX_URI_LEN 9000
#define HTTP_MAX_HEADER_LEN 100000
namespace epee
{
namespace net_utils
{
namespace http
{
struct multipart_entry
{
std::list<std::pair<std::string, std::string> > m_etc_header_fields;
std::string m_content_disposition;
std::string m_content_type;
std::string m_body;
};
inline
bool match_boundary(const std::string& content_type, std::string& boundary)
{
STATIC_REGEXP_EXPR_1(rexp_match_boundary, "boundary=(.*?)(($)|([;\\s,]))", boost::regex::icase | boost::regex::normal);
// 1
boost::smatch result;
if(boost::regex_search(content_type, result, rexp_match_boundary, boost::match_default) && result[0].matched)
{
boundary = result[1];
return true;
}
return false;
}
inline
bool parse_header(std::string::const_iterator it_begin, std::string::const_iterator it_end, multipart_entry& entry)
{
STATIC_REGEXP_EXPR_1(rexp_mach_field,
"\n?((Content-Disposition)|(Content-Type)"
// 12 3
"|([\\w-]+?)) ?: ?((.*?)(\r?\n))[^\t ]",
//4 56 7
boost::regex::icase | boost::regex::normal);
boost::smatch result;
std::string::const_iterator it_current_bound = it_begin;
std::string::const_iterator it_end_bound = it_end;
//lookup all fields and fill well-known fields
while( boost::regex_search( it_current_bound, it_end_bound, result, rexp_mach_field, boost::match_default) && result[0].matched)
{
const size_t field_val = 6;
const size_t field_etc_name = 4;
int i = 2; //start position = 2
if(result[i++].matched)//"Content-Disposition"
entry.m_content_disposition = result[field_val];
else if(result[i++].matched)//"Content-Type"
entry.m_content_type = result[field_val];
else if(result[i++].matched)//e.t.c (HAVE TO BE MATCHED!)
entry.m_etc_header_fields.push_back(std::pair<std::string, std::string>(result[field_etc_name], result[field_val]));
else
{
LOG_ERROR("simple_http_connection_handler::parse_header() not matched last entry in:"<<std::string(it_current_bound, it_end));
}
it_current_bound = result[(int)result.size()-1].first;
}
return true;
}
inline
bool handle_part_of_multipart(std::string::const_iterator it_begin, std::string::const_iterator it_end, multipart_entry& entry)
{
std::string end_str = "\r\n\r\n";
std::string::const_iterator end_header_it = std::search(it_begin, it_end, end_str.begin(), end_str.end());
if(end_header_it == it_end)
{
//header not matched
return false;
}
if(!parse_header(it_begin, end_header_it+4, entry))
{
LOG_ERROR("Failed to parse header:" << std::string(it_begin, end_header_it+2));
return false;
}
entry.m_body.assign(end_header_it+4, it_end);
return true;
}
inline
bool parse_multipart_body(const std::string& content_type, const std::string& body, std::list<multipart_entry>& out_values)
{
//bool res = file_io_utils::load_file_to_string("C:\\public\\multupart_data", body);
std::string boundary;
if(!match_boundary(content_type, boundary))
{
LOG_PRINT("Failed to match boundary in content type: " << content_type, LOG_LEVEL_0);
return false;
}
boundary+="\r\n";
bool is_stop = false;
bool first_step = true;
std::string::const_iterator it_begin = body.begin();
std::string::const_iterator it_end;
while(!is_stop)
{
std::string::size_type pos = body.find(boundary, std::distance(body.begin(), it_begin));
if(std::string::npos == pos)
{
is_stop = true;
boundary.erase(boundary.size()-2, 2);
boundary+= "--";
pos = body.find(boundary, std::distance(body.begin(), it_begin));
if(std::string::npos == pos)
{
LOG_PRINT("Error: Filed to match closing multipart tag", LOG_LEVEL_0);
it_end = body.end();
}else
{
it_end = body.begin() + pos;
}
}else
it_end = body.begin() + pos;
if(first_step && !is_stop)
{
first_step = false;
it_begin = it_end + boundary.size();
std::string temp = "\r\n--";
boundary = temp + boundary;
continue;
}
out_values.push_back(multipart_entry());
if(!handle_part_of_multipart(it_begin, it_end, out_values.back()))
{
LOG_PRINT("Failed to handle_part_of_multipart", LOG_LEVEL_0);
return false;
}
it_begin = it_end + boundary.size();
}
return true;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
simple_http_connection_handler<t_connection_context>::simple_http_connection_handler(i_service_endpoint* psnd_hndlr, config_type& config):
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m_state(http_state_retriving_comand_line),
m_body_transfer_type(http_body_transfer_undefined),
m_is_stop_handling(false),
m_len_summary(0),
m_len_remain(0),
m_config(config),
m_want_close(false),
m_psnd_hndlr(psnd_hndlr)
{
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::set_ready_state()
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{
m_is_stop_handling = false;
m_state = http_state_retriving_comand_line;
m_body_transfer_type = http_body_transfer_undefined;
m_query_info.clear();
m_len_summary = 0;
return true;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::handle_recv(const void* ptr, size_t cb)
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{
std::string buf((const char*)ptr, cb);
//LOG_PRINT_L0("HTTP_RECV: " << ptr << "\r\n" << buf);
//file_io_utils::save_string_to_file(string_tools::get_current_module_folder() + "/" + boost::lexical_cast<std::string>(ptr), std::string((const char*)ptr, cb));
bool res = handle_buff_in(buf);
if(m_want_close/*m_state == http_state_connection_close || m_state == http_state_error*/)
return false;
return res;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::handle_buff_in(std::string& buf)
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{
if(m_cache.size())
m_cache += buf;
else
m_cache.swap(buf);
m_is_stop_handling = false;
while(!m_is_stop_handling)
{
switch(m_state)
{
case http_state_retriving_comand_line:
//The HTTP protocol does not place any a priori limit on the length of a URI. (c)RFC2616
//but we forebly restirct it len to HTTP_MAX_URI_LEN to make it more safely
if(!m_cache.size())
break;
//check_and_handle_fake_response();
if((m_cache[0] == '\r' || m_cache[0] == '\n'))
{
//some times it could be that before query line cold be few line breaks
//so we have to be calm without panic with assers
m_cache.erase(0, 1);
break;
}
if(std::string::npos != m_cache.find('\n', 0))
handle_invoke_query_line();
else
{
m_is_stop_handling = true;
if(m_cache.size() > HTTP_MAX_URI_LEN)
{
LOG_ERROR("simple_http_connection_handler::handle_buff_out: Too long URI line");
m_state = http_state_error;
return false;
}
}
break;
case http_state_retriving_header:
{
std::string::size_type pos = match_end_of_header(m_cache);
if(std::string::npos == pos)
{
m_is_stop_handling = true;
if(m_cache.size() > HTTP_MAX_HEADER_LEN)
{
LOG_ERROR("simple_http_connection_handler::handle_buff_in: Too long header area");
m_state = http_state_error;
return false;
}
break;
}
analize_cached_request_header_and_invoke_state(pos);
break;
}
case http_state_retriving_body:
return handle_retriving_query_body();
case http_state_connection_close:
return false;
default:
LOG_ERROR("simple_http_connection_handler::handle_char_out: Wrong state: " << m_state);
return false;
case http_state_error:
LOG_ERROR("simple_http_connection_handler::handle_char_out: Error state!!!");
return false;
}
if(!m_cache.size())
m_is_stop_handling = true;
}
return true;
}
//--------------------------------------------------------------------------------------------
inline bool analize_http_method(const boost::smatch& result, http::http_method& method, int& http_ver_major, int& http_ver_minor)
{
CHECK_AND_ASSERT_MES(result[0].matched, false, "simple_http_connection_handler::analize_http_method() assert failed...");
http_ver_major = boost::lexical_cast<int>(result[11]);
http_ver_minor = boost::lexical_cast<int>(result[12]);
if(result[4].matched)
method = http::http_method_get;
else if(result[5].matched)
method = http::http_method_head;
else if(result[6].matched)
method = http::http_method_post;
else if(result[7].matched)
method = http::http_method_put;
else
method = http::http_method_etc;
return true;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::handle_invoke_query_line()
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{
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LOG_FRAME("simple_http_connection_handler<t_connection_context>::handle_recognize_protocol_out(*)", LOG_LEVEL_3);
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STATIC_REGEXP_EXPR_1(rexp_match_command_line, "^(((OPTIONS)|(GET)|(HEAD)|(POST)|(PUT)|(DELETE)|(TRACE)) (\\S+) HTTP/(\\d+).(\\d+))\r?\n", boost::regex::icase | boost::regex::normal);
// 123 4 5 6 7 8 9 10 11 12
//size_t match_len = 0;
boost::smatch result;
if(boost::regex_search(m_cache, result, rexp_match_command_line, boost::match_default) && result[0].matched)
{
analize_http_method(result, m_query_info.m_http_method, m_query_info.m_http_ver_hi, m_query_info.m_http_ver_hi);
m_query_info.m_URI = result[10];
parse_uri(m_query_info.m_URI, m_query_info.m_uri_content);
m_query_info.m_http_method_str = result[2];
m_query_info.m_full_request_str = result[0];
m_cache.erase(m_cache.begin(), to_nonsonst_iterator(m_cache, result[0].second));
m_state = http_state_retriving_header;
return true;
}else
{
m_state = http_state_error;
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LOG_ERROR("simple_http_connection_handler<t_connection_context>::handle_invoke_query_line(): Failed to match first line: " << m_cache);
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return false;
}
return false;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
std::string::size_type simple_http_connection_handler<t_connection_context>::match_end_of_header(const std::string& buf)
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{
//Here we returning head size, including terminating sequence (\r\n\r\n or \n\n)
std::string::size_type res = buf.find("\r\n\r\n");
if(std::string::npos != res)
return res+4;
res = buf.find("\n\n");
if(std::string::npos != res)
return res+2;
return res;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::analize_cached_request_header_and_invoke_state(size_t pos)
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{
//LOG_PRINT_L4("HTTP HEAD:\r\n" << m_cache.substr(0, pos));
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LOG_FRAME("simple_http_connection_handler<t_connection_context>::analize_cached_request_header_and_invoke_state(*)", LOG_LEVEL_3);
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m_query_info.m_full_request_buf_size = pos;
m_query_info.m_request_head.assign(m_cache.begin(), m_cache.begin()+pos);
if(!parse_cached_header(m_query_info.m_header_info, m_cache, pos))
{
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LOG_ERROR("simple_http_connection_handler<t_connection_context>::analize_cached_request_header_and_invoke_state(): failed to anilize request header: " << m_cache);
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m_state = http_state_error;
}
m_cache.erase(0, pos);
std::string req_command_str = m_query_info.m_full_request_str;
//if we have POST or PUT command, it is very possible tha we will get body
//but now, we suppose than we have body only in case of we have "ContentLength"
if(m_query_info.m_header_info.m_content_length.size())
{
m_state = http_state_retriving_body;
m_body_transfer_type = http_body_transfer_measure;
if(!get_len_from_content_lenght(m_query_info.m_header_info.m_content_length, m_len_summary))
{
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LOG_ERROR("simple_http_connection_handler<t_connection_context>::analize_cached_request_header_and_invoke_state(): Failed to get_len_from_content_lenght();, m_query_info.m_content_length="<<m_query_info.m_header_info.m_content_length);
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m_state = http_state_error;
return false;
}
if(0 == m_len_summary)
{ //current query finished, next will be next query
if(handle_request_and_send_response(m_query_info))
set_ready_state();
else
m_state = http_state_error;
}
m_len_remain = m_len_summary;
}else
{//current query finished, next will be next query
handle_request_and_send_response(m_query_info);
set_ready_state();
}
return true;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::handle_retriving_query_body()
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{
switch(m_body_transfer_type)
{
case http_body_transfer_measure:
return handle_query_measure();
case http_body_transfer_chunked:
case http_body_transfer_connection_close:
case http_body_transfer_multipart:
case http_body_transfer_undefined:
default:
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LOG_ERROR("simple_http_connection_handler<t_connection_context>::handle_retriving_query_body(): Unexpected m_body_query_type state:" << m_body_transfer_type);
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m_state = http_state_error;
return false;
}
return true;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::handle_query_measure()
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{
if(m_len_remain >= m_cache.size())
{
m_len_remain -= m_cache.size();
m_query_info.m_body += m_cache;
m_cache.clear();
}else
{
m_query_info.m_body.append(m_cache.begin(), m_cache.begin() + m_len_remain);
m_cache.erase(0, m_len_remain);
m_len_remain = 0;
}
if(!m_len_remain)
{
if(handle_request_and_send_response(m_query_info))
set_ready_state();
else
m_state = http_state_error;
}
return true;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::parse_cached_header(http_header_info& body_info, const std::string& m_cache_to_process, size_t pos)
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{
LOG_FRAME("http_stream_filter::parse_cached_header(*)", LOG_LEVEL_3);
STATIC_REGEXP_EXPR_1(rexp_mach_field,
"\n?((Connection)|(Referer)|(Content-Length)|(Content-Type)|(Transfer-Encoding)|(Content-Encoding)|(Host)|(Cookie)"
// 12 3 4 5 6 7 8 9
"|([\\w-]+?)) ?: ?((.*?)(\r?\n))[^\t ]",
//10 1112 13
boost::regex::icase | boost::regex::normal);
boost::smatch result;
std::string::const_iterator it_current_bound = m_cache_to_process.begin();
std::string::const_iterator it_end_bound = m_cache_to_process.begin()+pos;
body_info.clear();
//lookup all fields and fill well-known fields
while( boost::regex_search( it_current_bound, it_end_bound, result, rexp_mach_field, boost::match_default) && result[0].matched)
{
const size_t field_val = 12;
const size_t field_etc_name = 10;
int i = 2; //start position = 2
if(result[i++].matched)//"Connection"
body_info.m_connection = result[field_val];
else if(result[i++].matched)//"Referer"
body_info.m_referer = result[field_val];
else if(result[i++].matched)//"Content-Length"
body_info.m_content_length = result[field_val];
else if(result[i++].matched)//"Content-Type"
body_info.m_content_type = result[field_val];
else if(result[i++].matched)//"Transfer-Encoding"
body_info.m_transfer_encoding = result[field_val];
else if(result[i++].matched)//"Content-Encoding"
body_info.m_content_encoding = result[field_val];
else if(result[i++].matched)//"Host"
body_info.m_host = result[field_val];
else if(result[i++].matched)//"Cookie"
body_info.m_cookie = result[field_val];
else if(result[i++].matched)//e.t.c (HAVE TO BE MATCHED!)
body_info.m_etc_fields.push_back(std::pair<std::string, std::string>(result[field_etc_name], result[field_val]));
else
{
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LOG_ERROR("simple_http_connection_handler<t_connection_context>::parse_cached_header() not matched last entry in:"<<m_cache_to_process);
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}
it_current_bound = result[(int)result.size()-1]. first;
}
return true;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::get_len_from_content_lenght(const std::string& str, size_t& OUT len)
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{
STATIC_REGEXP_EXPR_1(rexp_mach_field, "\\d+", boost::regex::normal);
std::string res;
boost::smatch result;
if(!(boost::regex_search( str, result, rexp_mach_field, boost::match_default) && result[0].matched))
return false;
len = boost::lexical_cast<size_t>(result[0]);
return true;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::handle_request_and_send_response(const http::http_request_info& query_info)
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{
http_response_info response;
bool res = handle_request(query_info, response);
//CHECK_AND_ASSERT_MES(res, res, "handle_request(query_info, response) returned false" );
std::string response_data = get_response_header(response);
//LOG_PRINT_L0("HTTP_SEND: << \r\n" << response_data + response.m_body);
LOG_PRINT_L3("HTTP_RESPONSE_HEAD: << \r\n" << response_data);
m_psnd_hndlr->do_send((void*)response_data.data(), response_data.size());
if(response.m_body.size())
m_psnd_hndlr->do_send((void*)response.m_body.data(), response.m_body.size());
return res;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::handle_request(const http::http_request_info& query_info, http_response_info& response)
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{
std::string uri_to_path = query_info.m_uri_content.m_path;
if("/" == uri_to_path)
uri_to_path = "/index.html";
//slash_to_back_slash(uri_to_path);
m_config.m_lock.lock();
std::string destination_file_path = m_config.m_folder + uri_to_path;
m_config.m_lock.unlock();
if(!file_io_utils::load_file_to_string(destination_file_path.c_str(), response.m_body))
{
LOG_PRINT("URI \""<< query_info.m_full_request_str.substr(0, query_info.m_full_request_str.size()-2) << "\" [" << destination_file_path << "] Not Found (404 )" , LOG_LEVEL_1);
response.m_body = get_not_found_response_body(query_info.m_URI);
response.m_response_code = 404;
response.m_response_comment = "Not found";
response.m_mime_tipe = "text/html";
return true;
}
LOG_PRINT(" -->> " << query_info.m_full_request_str << "\r\n<<--OK" , LOG_LEVEL_3);
response.m_response_code = 200;
response.m_response_comment = "OK";
response.m_mime_tipe = get_file_mime_tipe(uri_to_path);
return true;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
std::string simple_http_connection_handler<t_connection_context>::get_response_header(const http_response_info& response)
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{
std::string buf = "HTTP/1.1 ";
buf += boost::lexical_cast<std::string>(response.m_response_code) + " " + response.m_response_comment + "\r\n" +
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"Server: Epee-based\r\n"
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"Content-Length: ";
buf += boost::lexical_cast<std::string>(response.m_body.size()) + "\r\n";
buf += "Content-Type: ";
buf += response.m_mime_tipe + "\r\n";
buf += "Last-Modified: ";
time_t tm;
time(&tm);
buf += misc_utils::get_internet_time_str(tm) + "\r\n";
buf += "Accept-Ranges: bytes\r\n";
//Wed, 01 Dec 2010 03:27:41 GMT"
string_tools::trim(m_query_info.m_header_info.m_connection);
if(m_query_info.m_header_info.m_connection.size())
{
if(!string_tools::compare_no_case("close", m_query_info.m_header_info.m_connection))
{
//closing connection after sending
buf += "Connection: close\r\n";
m_state = http_state_connection_close;
m_want_close = true;
}
}
//add additional fields, if it is
for(fields_list::const_iterator it = response.m_additional_fields.begin(); it!=response.m_additional_fields.end(); it++)
buf += it->first + ":" + it->second + "\r\n";
buf+="\r\n";
return buf;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
std::string simple_http_connection_handler<t_connection_context>::get_file_mime_tipe(const std::string& path)
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{
std::string result;
std::string ext = string_tools::get_extension(path);
if(!string_tools::compare_no_case(ext, "gif"))
result = "image/gif";
else if(!string_tools::compare_no_case(ext, "jpg"))
result = "image/jpeg";
else if(!string_tools::compare_no_case(ext, "html"))
result = "text/html";
else if(!string_tools::compare_no_case(ext, "htm"))
result = "text/html";
else if(!string_tools::compare_no_case(ext, "js"))
result = "application/x-javascript";
else if(!string_tools::compare_no_case(ext, "css"))
result = "text/css";
else if(!string_tools::compare_no_case(ext, "xml"))
result = "application/xml";
else if(!string_tools::compare_no_case(ext, "svg"))
result = "image/svg+xml";
return result;
}
//-----------------------------------------------------------------------------------
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template<class t_connection_context>
std::string simple_http_connection_handler<t_connection_context>::get_not_found_response_body(const std::string& URI)
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{
std::string body =
"<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML 2.0//EN\">\r\n"
"<html><head>\r\n"
"<title>404 Not Found</title>\r\n"
"</head><body>\r\n"
"<h1>Not Found</h1>\r\n"
"<p>The requested URL \r\n";
body += URI;
body += "was not found on this server.</p>\r\n"
"</body></html>\r\n";
return body;
}
//--------------------------------------------------------------------------------------------
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template<class t_connection_context>
bool simple_http_connection_handler<t_connection_context>::slash_to_back_slash(std::string& str)
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{
for(std::string::iterator it = str.begin(); it!=str.end(); it++)
if('/' == *it)
*it = '\\';
return true;
}
}
}
}
//--------------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------------
//--------------------------------------------------------------------------------------------
