167 lines
5.3 KiB
C++
167 lines
5.3 KiB
C++
/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2012 Tatsuhiro Tsujikawa
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "shrpx_http.h"
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#include "shrpx_config.h"
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#include "shrpx_log.h"
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#include "http2.h"
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#include "util.h"
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using namespace nghttp2;
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namespace shrpx {
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namespace http {
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StringRef create_error_html(BlockAllocator &balloc, unsigned int http_status) {
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auto &httpconf = get_config()->http;
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const auto &error_pages = httpconf.error_pages;
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for (const auto &page : error_pages) {
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if (page.http_status == 0 || page.http_status == http_status) {
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return StringRef{std::begin(page.content), std::end(page.content)};
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}
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}
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auto status_string = http2::get_status_string(balloc, http_status);
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return concat_string_ref(
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balloc, StringRef::from_lit(R"(<!DOCTYPE html><html lang="en"><title>)"),
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status_string, StringRef::from_lit("</title><body><h1>"), status_string,
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StringRef::from_lit("</h1><footer>"), httpconf.server_name,
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StringRef::from_lit("</footer></body></html>"));
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}
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StringRef create_forwarded(BlockAllocator &balloc, int params,
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const StringRef &node_by, const StringRef &node_for,
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const StringRef &host, const StringRef &proto) {
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size_t len = 0;
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if ((params & FORWARDED_BY) && !node_by.empty()) {
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len += str_size("by=\"") + node_by.size() + str_size("\";");
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}
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if ((params & FORWARDED_FOR) && !node_for.empty()) {
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len += str_size("for=\"") + node_for.size() + str_size("\";");
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}
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if ((params & FORWARDED_HOST) && !host.empty()) {
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len += str_size("host=\"") + host.size() + str_size("\";");
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}
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if ((params & FORWARDED_PROTO) && !proto.empty()) {
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len += str_size("proto=") + proto.size() + str_size(";");
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}
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auto iov = make_byte_ref(balloc, len + 1);
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auto p = iov.base;
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if ((params & FORWARDED_BY) && !node_by.empty()) {
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// This must be quoted-string unless it is obfuscated version
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// (which starts with "_") or some special value (e.g.,
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// "localhost" for UNIX domain socket), since ':' is not allowed
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// in token. ':' is used to separate host and port.
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if (node_by[0] == '_' || node_by[0] == 'l') {
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p = util::copy_lit(p, "by=");
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p = std::copy(std::begin(node_by), std::end(node_by), p);
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p = util::copy_lit(p, ";");
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} else {
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p = util::copy_lit(p, "by=\"");
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p = std::copy(std::begin(node_by), std::end(node_by), p);
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p = util::copy_lit(p, "\";");
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}
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}
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if ((params & FORWARDED_FOR) && !node_for.empty()) {
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// We only quote IPv6 literal address only, which starts with '['.
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if (node_for[0] == '[') {
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p = util::copy_lit(p, "for=\"");
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p = std::copy(std::begin(node_for), std::end(node_for), p);
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p = util::copy_lit(p, "\";");
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} else {
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p = util::copy_lit(p, "for=");
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p = std::copy(std::begin(node_for), std::end(node_for), p);
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p = util::copy_lit(p, ";");
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}
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}
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if ((params & FORWARDED_HOST) && !host.empty()) {
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// Just be quoted to skip checking characters.
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p = util::copy_lit(p, "host=\"");
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p = std::copy(std::begin(host), std::end(host), p);
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p = util::copy_lit(p, "\";");
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}
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if ((params & FORWARDED_PROTO) && !proto.empty()) {
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// Scheme production rule only allow characters which are all in
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// token.
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p = util::copy_lit(p, "proto=");
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p = std::copy(std::begin(proto), std::end(proto), p);
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*p++ = ';';
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}
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if (iov.base == p) {
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return StringRef{};
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}
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--p;
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*p = '\0';
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return StringRef{iov.base, p};
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}
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std::string colorizeHeaders(const char *hdrs) {
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std::string nhdrs;
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const char *p = strchr(hdrs, '\n');
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if (!p) {
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// Not valid HTTP header
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return hdrs;
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}
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nhdrs.append(hdrs, p + 1);
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++p;
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while (1) {
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const char *np = strchr(p, ':');
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if (!np) {
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nhdrs.append(p);
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break;
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}
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nhdrs += TTY_HTTP_HD;
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nhdrs.append(p, np);
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nhdrs += TTY_RST;
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p = np;
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np = strchr(p, '\n');
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if (!np) {
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nhdrs.append(p);
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break;
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}
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nhdrs.append(p, np + 1);
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p = np + 1;
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}
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return nhdrs;
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}
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ssize_t select_padding_callback(nghttp2_session *session,
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const nghttp2_frame *frame, size_t max_payload,
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void *user_data) {
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return std::min(max_payload, frame->hd.length + get_config()->padding);
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}
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} // namespace http
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} // namespace shrpx
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