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reply.cpp
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reply.cpp
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//
// reply.cpp
// ~~~~~~~~~
//
// Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "stdafx.h"
#include "reply.hpp"
#include "mime_types.hpp"
#include "utf.hpp"
#include <string>
#include <fstream>
#include <boost/algorithm/string.hpp>
namespace http {
namespace server {
namespace status_strings {
constexpr auto switching_protocols = "HTTP/1.1 101 Switching Protocols\r\n";
constexpr auto download_file = "HTTP/1.1 102 Download File\r\n";
constexpr auto ok = "HTTP/1.1 200 OK\r\n";
constexpr auto created = "HTTP/1.1 201 Created\r\n";
constexpr auto accepted = "HTTP/1.1 202 Accepted\r\n";
constexpr auto no_content = "HTTP/1.1 204 No Content\r\n";
constexpr auto multiple_choices = "HTTP/1.1 300 Multiple Choices\r\n";
constexpr auto moved_permanently = "HTTP/1.1 301 Moved Permanently\r\n";
constexpr auto moved_temporarily = "HTTP/1.1 302 Moved Temporarily\r\n";
constexpr auto not_modified = "HTTP/1.1 304 Not Modified\r\n";
constexpr auto bad_request = "HTTP/1.1 400 Bad Request\r\n";
constexpr auto unauthorized = "HTTP/1.1 401 Unauthorized\r\n";
constexpr auto forbidden = "HTTP/1.1 403 Forbidden\r\n";
constexpr auto not_found = "HTTP/1.1 404 Not Found\r\n";
constexpr auto internal_server_error = "HTTP/1.1 500 Internal Server Error\r\n";
constexpr auto not_implemented = "HTTP/1.1 501 Not Implemented\r\n";
constexpr auto bad_gateway = "HTTP/1.1 502 Bad Gateway\r\n";
constexpr auto service_unavailable = "HTTP/1.1 503 Service Unavailable\r\n";
std::string to_string(const reply::status_type &status)
{
switch (status)
{
case reply::switching_protocols:
return switching_protocols;
case reply::download_file:
return download_file;
case reply::ok:
return ok;
case reply::created:
return created;
case reply::accepted:
return accepted;
case reply::no_content:
return no_content;
case reply::multiple_choices:
return multiple_choices;
case reply::moved_permanently:
return moved_permanently;
case reply::moved_temporarily:
return moved_temporarily;
case reply::not_modified:
return not_modified;
case reply::bad_request:
return bad_request;
case reply::unauthorized:
return unauthorized;
case reply::forbidden:
return forbidden;
case reply::not_found:
return not_found;
case reply::internal_server_error:
return internal_server_error;
case reply::not_implemented:
return not_implemented;
case reply::bad_gateway:
return bad_gateway;
case reply::service_unavailable:
return service_unavailable;
default:
return internal_server_error;
}
}
} // namespace status_strings
namespace misc_strings {
constexpr char name_value_separator[] = { ':', ' ', 0 };
constexpr char crlf[] = { '\r', '\n', 0 };
} // namespace misc_strings
std::string reply::header_to_string()
{
std::string buffers = status_strings::to_string(status);
for (const auto &h : headers)
buffers += h.name + misc_strings::name_value_separator + h.value + misc_strings::crlf;
buffers += misc_strings::crlf;
return buffers;
}
std::string reply::to_string(const std::string &method)
{
std::string buffers = header_to_string();
if (method != "HEAD") {
buffers += content;
}
return buffers;
}
void reply::reset()
{
headers.clear();
content = "";
bIsGZIP = false;
}
namespace stock_replies {
constexpr auto switching_protocols = "";
constexpr auto download_file = "";
constexpr auto ok = "";
constexpr auto created = "<html>"
"<head><title>Created</title></head>"
"<body><h1>201 Created</h1></body>"
"</html>";
constexpr auto accepted = "<html>"
"<head><title>Accepted</title></head>"
"<body><h1>202 Accepted</h1></body>"
"</html>";
constexpr auto no_content = ""; // The 204 response MUST NOT contain a message-body
constexpr auto multiple_choices = "<html>"
"<head><title>Multiple Choices</title></head>"
"<body><h1>300 Multiple Choices</h1></body>"
"</html>";
constexpr auto moved_permanently = "<html>"
"<head><title>Moved Permanently</title></head>"
"<body><h1>301 Moved Permanently</h1></body>"
"</html>";
constexpr auto moved_temporarily = "<html>"
"<head><title>Moved Temporarily</title></head>"
"<body><h1>302 Moved Temporarily</h1></body>"
"</html>";
constexpr auto not_modified = ""; // The 304 response MUST NOT contain a message-body
constexpr auto bad_request = "<html>"
"<head><title>Bad Request</title></head>"
"<body><h1>400 Bad Request</h1></body>"
"</html>";
constexpr auto unauthorized = "<html>"
"<head><title>Unauthorized</title></head>"
"<body><h1>401 Unauthorized</h1></body>"
"</html>";
constexpr auto forbidden = "<html>"
"<head><title>Forbidden</title></head>"
"<body><h1>403 Forbidden</h1></body>"
"</html>";
constexpr auto not_found = "<html>"
"<head><title>Not Found</title></head>"
"<body><h1>404 Not Found</h1></body>"
"</html>";
constexpr auto internal_server_error = "<html>"
"<head><title>Internal Server Error</title></head>"
"<body><h1>500 Internal Server Error</h1></body>"
"</html>";
constexpr auto not_implemented = "<html>"
"<head><title>Not Implemented</title></head>"
"<body><h1>501 Not Implemented</h1></body>"
"</html>";
constexpr auto bad_gateway = "<html>"
"<head><title>Bad Gateway</title></head>"
"<body><h1>502 Bad Gateway</h1></body>"
"</html>";
constexpr auto service_unavailable = "<html>"
"<head><title>Service Unavailable</title></head>"
"<body><h1>503 Service Unavailable</h1></body>"
"</html>";
std::string to_string(const reply::status_type &status)
{
switch (status)
{
case reply::switching_protocols:
return switching_protocols;
case reply::download_file:
return download_file;
case reply::ok:
return ok;
case reply::created:
return created;
case reply::accepted:
return accepted;
case reply::no_content:
return no_content;
case reply::multiple_choices:
return multiple_choices;
case reply::moved_permanently:
return moved_permanently;
case reply::moved_temporarily:
return moved_temporarily;
case reply::not_modified:
return not_modified;
case reply::bad_request:
return bad_request;
case reply::unauthorized:
return unauthorized;
case reply::forbidden:
return forbidden;
case reply::not_found:
return not_found;
case reply::internal_server_error:
return internal_server_error;
case reply::not_implemented:
return not_implemented;
case reply::bad_gateway:
return bad_gateway;
case reply::service_unavailable:
return service_unavailable;
default:
return internal_server_error;
}
}
} // namespace stock_replies
reply reply::stock_reply(reply::status_type status, bool addsecheaders)
{
reply rep;
rep.status = status;
rep.content = stock_replies::to_string(status);
if (!rep.content.empty()) { // response can be empty (eg. HTTP 304)
rep.headers.resize(2);
rep.headers[0].name = "Content-Length";
rep.headers[0].value = std::to_string(rep.content.size());
rep.headers[1].name = "Content-Type";
rep.headers[1].value = "text/html;charset=UTF-8";
}
if (addsecheaders)
add_security_headers(&rep);
return rep;
}
void reply::add_security_headers(reply *rep)
{
add_header(rep, "Strict-Transport-Security", "max-age=31536000; includeSubDomains; preload", true);
add_header(rep, "X-Content-Type-Options", "nosniff", true);
add_header(rep, "Content-Security-Policy", "frame-ancestors 'self'", true);
//add_header(rep, "X-XSS-Protection", "1; mode=block", true); // obsolete thx to CSP
//add_header(rep, "X-Frame-Options", "SAMEORIGIN", true); // obsolete thx to CSP
}
void reply::add_cors_headers(reply *rep)
{
add_header(rep, "Access-Control-Allow-Origin", "*", true);
}
void reply::add_header(reply *rep, const std::string &name, const std::string &value, bool replace)
{
size_t num = rep->headers.size();
if (replace) {
for (auto &h : rep->headers)
{
if (boost::iequals(h.name, name))
{
h.value = value;
return;
}
}
}
rep->headers.resize(num + 1);
rep->headers[num].name = name;
rep->headers[num].value = value;
}
void reply::add_header_if_absent(reply *rep, const std::string &name, const std::string &value)
{
for (const auto &h : rep->headers)
{
if (boost::iequals(h.name, name))
{
// is present
return;
}
}
add_header(rep, name, value, false);
}
void reply::set_content(reply *rep, const std::string &content)
{
rep->content = content;
}
void reply::set_content(reply *rep, const std::wstring &content_w)
{
cUTF utf( content_w.c_str() );
rep->content.assign(utf.get8(), strlen(utf.get8()));
}
bool reply::set_content_from_file(reply *rep, const std::string &file_path)
{
std::ifstream file(file_path.c_str(), std::ios::in | std::ios::binary);
if (!file.is_open())
return false;
file.seekg(0, std::ios::end);
size_t fileSize = (size_t)file.tellg();
if (fileSize > 0) {
rep->content.resize(fileSize);
file.seekg(0, std::ios::beg);
file.read(&rep->content[0], rep->content.size());
}
file.close();
return true;
}
bool reply::set_content_from_file(reply *rep, const std::string &file_path, const std::string &attachment, bool set_content_type)
{
if (!reply::set_content_from_file(rep, file_path))
return false;
reply::add_header_attachment(rep, attachment);
if (set_content_type == true) {
std::size_t last_dot_pos = attachment.find_last_of('.');
if (last_dot_pos != std::string::npos) {
std::string file_extension = attachment.substr(last_dot_pos + 1);
std::string mime_type = mime_types::extension_to_type(file_extension);
reply::add_header_content_type(rep, mime_type);
}
}
return true;
}
bool reply::set_download_file(reply* rep, const std::string& file_path, const std::string& attachment)
{
if (file_path.empty() || attachment.empty())
return false;
rep->reset();
rep->status = reply::status_type::download_file;
rep->content = file_path + "\r\n" + attachment;
return true;
}
void reply::add_header_attachment(reply *rep, const std::string &attachment)
{
reply::add_header(rep, "Content-Disposition", "attachment; filename=" + attachment);
}
/*
RFC-7231
Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content
3.1.1.5. Content-Type
A sender that generates a message containing a payload body SHOULD
generate a Content-Type header field in that message unless the
intended media type of the enclosed representation is unknown to the
sender.
*/
void reply::add_header_content_type(reply *rep, const std::string & content_type) {
if (!content_type.empty())
{
std::string charset = "";
if (((content_type.find("text/") != std::string::npos) ||
(content_type.find("/xml") != std::string::npos) ||
(content_type.find("/javascript") != std::string::npos) ||
(content_type.find("/json") != std::string::npos)) &&
(content_type.find("charset") == std::string::npos)) {
// Add charset on text content
charset = ";charset=UTF-8";
}
reply::add_header(rep, "Content-Type", content_type + charset);
}
}
} // namespace server
} // namespace http