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// file : web/apache/request -*- C++ -*-
// copyright : Copyright (c) 2014-2015 Code Synthesis Tools CC
// license : MIT; see accompanying LICENSE file
#ifndef WEB_APACHE_REQUEST
#define WEB_APACHE_REQUEST
#include <stdexcept>
#include <exception>
#include <string>
#include <ios>
#include <istream>
#include <ostream>
#include <streambuf>
#include <memory> // unique_ptr
#include <algorithm> // move
#include <chrono>
#include <cassert>
#include <apr_strings.h>
#include <httpd/httpd.h>
#include <httpd/http_core.h>
#include <httpd/util_script.h>
#include <web/module>
#include <web/apache/stream>
namespace web
{
namespace apache
{
class request : public web::request, public web::response
{
friend class service;
request (request_rec* rec) noexcept: rec_ (rec) {}
// Flush of buffered content.
//
int
flush ();
// Get request body data stream.
//
virtual std::istream&
data ()
{
if (write_flag ())
{
throw sequence_error ("::web::apache::request::data");
}
if (!in_)
{
std::unique_ptr<std::streambuf> in_buf (new istreambuf (rec_));
in_.reset (new std::istream (in_buf.get ()));
in_buf_ = std::move (in_buf);
in_->exceptions (std::ios::failbit | std::ios::badbit);
// Save form data now otherwise will not be available to do later
// when data read from stream.
//
form_data ();
}
return *in_;
}
// Get request parameters.
//
virtual const name_values&
parameters ()
{
if (!parameters_)
{
parameters_.reset (new name_values());
try
{
parse_parameters(rec_->args);
parse_parameters(form_data ()->c_str ());
}
catch(const std::invalid_argument& )
{
throw invalid_request();
}
}
return *parameters_;
}
// Get request cookies.
//
virtual const name_values&
cookies ();
// Get response status code.
//
status_code status () const noexcept {return status_;}
// Set response status code.
//
virtual void
status (status_code status)
{
if (status != status_)
{
// Setting status code in exception handler is a common usecase
// where no sense to throw but still need to signal apache a
// proper status code.
//
if (write_flag () && !std::current_exception ())
{
throw sequence_error ("::web::apache::request::status");
}
status_ = status;
type_.clear ();
buffer_ = true;
out_.reset ();
out_buf_.reset ();
set_content_type ();
}
}
// Set response status code, content type and get body stream.
//
virtual std::ostream&
content (status_code status,
const std::string& type,
bool buffer = true);
// Add response cookie.
//
virtual void
cookie (const char* name,
const char* value,
const std::chrono::seconds* max_age = 0,
const char* path = 0,
const char* domain = 0,
bool secure = false);
private:
using string_ptr = std::unique_ptr<std::string>;
// Get application/x-www-form-urlencoded form data.
//
const string_ptr&
form_data ();
void
parse_parameters (const char* args);
static void
mime_url_encode (const char* v, std::ostream& o);
static std::string
mime_url_decode (const char* b, const char* e, bool trim = false);
// Save content type to apache internals.
//
void
set_content_type () const noexcept
{
if (type_.empty ())
ap_set_content_type (rec_, nullptr);
else
{
if(status_ == HTTP_OK)
{
ap_set_content_type (rec_,
apr_pstrdup (rec_->pool, type_.c_str ()));
}
else
{
// Unfortunatelly there is no way to set a proper content type
// for error custom response. Depending on presense of
// "suppress-error-charset" key in request_rec::subprocess_env
// table content type is set to "text/html" otherwise to
// "text/html; charset=iso-8859-1" (read http_protocol.c for
// details). I have chosen the first one as it is better not to
// specify charset than to set a wrong one. Ensure to put
// a proper encoding to
// <meta http-equiv="Content-Type" content="text/html;charset=...">
// tag so browser can render the page properly.
// The clean solution would be patching apache but let's leave this
// troublesome option untill really required.
//
apr_table_set (rec_->subprocess_env, "suppress-error-charset", "");
}
}
}
bool
write_flag () const noexcept
{
if (!buffer_)
{
assert (out_buf_);
auto b = dynamic_cast<ostreambuf*> (out_buf_.get ());
assert (b);
return b->write_flag ();
}
return false;
}
private:
request_rec* rec_;
status_code status_ {HTTP_OK};
std::string type_;
bool buffer_ {true};
std::unique_ptr<std::streambuf> out_buf_;
std::unique_ptr<std::ostream> out_;
std::unique_ptr<std::streambuf> in_buf_;
std::unique_ptr<std::istream> in_;
std::unique_ptr<name_values> parameters_;
std::unique_ptr<name_values> cookies_;
string_ptr form_data_;
};
}
}
#include <web/apache/request.ixx>
#endif // WEB_APACHE_REQUEST
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