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/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2012 Tatsuhiro Tsujikawa
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef SHRPX_HTTP_H
#define SHRPX_HTTP_H
#include "shrpx.h"
#include <string>
#include <algorithm>
#include <nghttp2/nghttp2.h>
#include "shrpx_config.h"
#include "util.h"
#include "allocator.h"
using namespace nghttp2;
using namespace std::literals;
namespace shrpx {
namespace http {
std::string_view create_error_html(BlockAllocator &balloc,
unsigned int status_code);
struct ViaValueGenerator {
template <std::weakly_incrementable O>
requires(std::indirectly_writable<O, char>)
constexpr O operator()(int major, int minor, O result) {
using result_type = std::iter_value_t<O>;
*result++ = static_cast<result_type>(major + '0');
if (major < 2) {
*result++ = '.';
*result++ = static_cast<result_type>(minor + '0');
}
return std::ranges::copy(" nghttpx"sv, result).out;
}
};
template <typename OutputIt>
OutputIt create_via_header_value(OutputIt dst, int major, int minor) {
return ViaValueGenerator{}(major, minor, std::move(dst));
}
// Returns generated RFC 7239 Forwarded header field value. The
// |params| is bitwise-OR of zero or more of shrpx_forwarded_param
// defined in shrpx_config.h.
std::string_view create_forwarded(BlockAllocator &balloc, uint32_t params,
const std::string_view &node_by,
const std::string_view &node_for,
const std::string_view &host,
const std::string_view &proto);
// Adds ANSI color codes to HTTP headers |hdrs|.
std::string colorize_headers(const std::string_view &hdrs);
nghttp2_ssize select_padding_callback(nghttp2_session *session,
const nghttp2_frame *frame,
size_t max_payload, void *user_data);
// Creates set-cookie-string for cookie based affinity. If |path| is
// not empty, "; <path>" is added. If |secure| is true, "; Secure" is
// added.
std::string_view create_affinity_cookie(BlockAllocator &balloc,
const std::string_view &name,
uint32_t affinity_cookie,
const std::string_view &path,
bool secure);
// Returns true if |secure| indicates that Secure attribute should be
// set.
bool require_cookie_secure_attribute(SessionAffinityCookieSecure secure,
const std::string_view &scheme);
// Returns RFC 7838 alt-svc header field value.
std::string_view create_altsvc_header_value(BlockAllocator &balloc,
const std::vector<AltSvc> &altsvcs);
// Returns true if either of the following conditions holds:
// - scheme is https and encrypted is true
// - scheme is http and encrypted is false
// Otherwise returns false.
bool check_http_scheme(const std::string_view &scheme, bool encrypted);
} // namespace http
} // namespace shrpx
#endif // !defined(SHRPX_HTTP_H)