nghttp2/src/shrpx_http.cc

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/*
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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.
*/
#include "shrpx_http.h"
#include "shrpx_config.h"
#include "shrpx_log.h"
#include "http2.h"
#include "util.h"
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using namespace nghttp2;
namespace shrpx {
namespace http {
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StringRef create_error_html(BlockAllocator &balloc, unsigned int http_status) {
auto &httpconf = get_config()->http;
const auto &error_pages = httpconf.error_pages;
for (const auto &page : error_pages) {
if (page.http_status == 0 || page.http_status == http_status) {
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return StringRef{std::begin(page.content), std::end(page.content)};
}
}
auto status_string = http2::get_status_string(balloc, http_status);
const auto &server_name = httpconf.server_name;
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return concat_string_ref(
balloc, StringRef::from_lit(R"(<!DOCTYPE html><html lang="en"><title>)"),
status_string, StringRef::from_lit("</title><body><h1>"), status_string,
StringRef::from_lit("</h1><footer>"), server_name,
StringRef::from_lit("</footer></body></html>"));
}
StringRef create_forwarded(BlockAllocator &balloc, int params,
const StringRef &node_by, const StringRef &node_for,
const StringRef &host, const StringRef &proto) {
size_t len = 0;
if ((params & FORWARDED_BY) && !node_by.empty()) {
len += str_size("by=\"") + node_by.size() + str_size("\";");
}
if ((params & FORWARDED_FOR) && !node_for.empty()) {
len += str_size("for=\"") + node_for.size() + str_size("\";");
}
if ((params & FORWARDED_HOST) && !host.empty()) {
len += str_size("host=\"") + host.size() + str_size("\";");
}
if ((params & FORWARDED_PROTO) && !proto.empty()) {
len += str_size("proto=") + proto.size() + str_size(";");
}
auto iov = make_byte_ref(balloc, len + 1);
auto p = iov.base;
if ((params & FORWARDED_BY) && !node_by.empty()) {
// This must be quoted-string unless it is obfuscated version
// (which starts with "_") or some special value (e.g.,
// "localhost" for UNIX domain socket), since ':' is not allowed
// in token. ':' is used to separate host and port.
if (node_by[0] == '_' || node_by[0] == 'l') {
p = util::copy_lit(p, "by=");
p = std::copy(std::begin(node_by), std::end(node_by), p);
p = util::copy_lit(p, ";");
} else {
p = util::copy_lit(p, "by=\"");
p = std::copy(std::begin(node_by), std::end(node_by), p);
p = util::copy_lit(p, "\";");
}
}
if ((params & FORWARDED_FOR) && !node_for.empty()) {
// We only quote IPv6 literal address only, which starts with '['.
if (node_for[0] == '[') {
p = util::copy_lit(p, "for=\"");
p = std::copy(std::begin(node_for), std::end(node_for), p);
p = util::copy_lit(p, "\";");
} else {
p = util::copy_lit(p, "for=");
p = std::copy(std::begin(node_for), std::end(node_for), p);
p = util::copy_lit(p, ";");
}
}
if ((params & FORWARDED_HOST) && !host.empty()) {
// Just be quoted to skip checking characters.
p = util::copy_lit(p, "host=\"");
p = std::copy(std::begin(host), std::end(host), p);
p = util::copy_lit(p, "\";");
}
if ((params & FORWARDED_PROTO) && !proto.empty()) {
// Scheme production rule only allow characters which are all in
// token.
p = util::copy_lit(p, "proto=");
p = std::copy(std::begin(proto), std::end(proto), p);
*p++ = ';';
}
if (iov.base == p) {
return StringRef{};
}
--p;
*p = '\0';
return StringRef{iov.base, p};
}
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std::string colorizeHeaders(const char *hdrs) {
std::string nhdrs;
const char *p = strchr(hdrs, '\n');
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if (!p) {
// Not valid HTTP header
return hdrs;
}
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nhdrs.append(hdrs, p + 1);
++p;
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while (1) {
const char *np = strchr(p, ':');
if (!np) {
nhdrs.append(p);
break;
}
nhdrs += TTY_HTTP_HD;
nhdrs.append(p, np);
nhdrs += TTY_RST;
p = np;
np = strchr(p, '\n');
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if (!np) {
nhdrs.append(p);
break;
}
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nhdrs.append(p, np + 1);
p = np + 1;
}
return nhdrs;
}
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ssize_t select_padding_callback(nghttp2_session *session,
const nghttp2_frame *frame, size_t max_payload,
void *user_data) {
return std::min(max_payload, frame->hd.length + get_config()->padding);
}
} // namespace http
} // namespace shrpx