2015-03-04 17:52:12 +01:00
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/*
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* nghttp2 - HTTP/2 C Library
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*
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* Copyright (c) 2015 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 "asio_server_serve_mux.h"
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2015-03-05 13:42:48 +01:00
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#include "asio_server_request_impl.h"
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2015-03-04 17:52:12 +01:00
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#include "util.h"
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#include "http2.h"
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namespace nghttp2 {
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namespace asio_http2 {
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namespace server {
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namespace {
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std::string create_html(int status_code) {
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std::string res;
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res.reserve(512);
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auto status = ::nghttp2::http2::get_status_string(status_code);
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res += "<!DOCTYPE html><html lang=en><title>";
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res += status;
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res += "</title><body><h1>";
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res += status;
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res += "</h1></body></html>";
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return res;
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}
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} // namespace
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namespace {
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request_cb redirect_handler(int status_code, std::string path) {
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return [status_code, path](const request &req, const response &res) {
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auto &uref = req.impl().uri();
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auto newloc = uref.scheme;
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newloc += "://";
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newloc += uref.host;
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newloc += path;
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if (!uref.raw_query.empty()) {
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newloc += "?";
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newloc += uref.raw_query;
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}
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auto html = create_html(status_code);
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header_map h;
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h.emplace("location", header_value{std::move(newloc)});
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h.emplace("content-length", header_value{util::utos(html.size())});
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h.emplace("content-type", header_value{"text/html; charset=utf-8"});
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res.write_head(status_code, std::move(h));
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res.end(std::move(html));
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};
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}
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} // namespace
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namespace {
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request_cb status_handler(int status_code) {
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return [status_code](const request &req, const response &res) {
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auto html = create_html(status_code);
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header_map h;
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h.emplace("content-length", header_value{util::utos(html.size())});
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h.emplace("content-type", header_value{"text/html; charset=utf-8"});
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res.write_head(status_code, std::move(h));
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res.end(std::move(html));
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};
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}
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} // namespace
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bool serve_mux::handle(std::string pattern, request_cb cb) {
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if (pattern.empty() || !cb) {
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return false;
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}
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auto it = mux_.find(pattern);
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if (it != std::end(mux_) && (*it).second.user_defined) {
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return false;
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}
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// if pattern ends with '/' (e.g., /foo/), add implicit permanent
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// redirect for '/foo'.
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if (pattern.size() >= 2 && pattern.back() == '/') {
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auto redirect_pattern = pattern.substr(0, pattern.size() - 1);
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auto it = mux_.find(redirect_pattern);
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if (it == std::end(mux_) || !(*it).second.user_defined) {
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std::string path;
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if (pattern[0] == '/') {
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path = pattern;
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} else {
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// skip host part
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path = pattern.substr(pattern.find('/'));
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}
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if (it == std::end(mux_)) {
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mux_.emplace(std::move(redirect_pattern),
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handler_entry{false,
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redirect_handler(301, std::move(path)),
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pattern});
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} else {
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(*it).second = handler_entry{
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false, redirect_handler(301, std::move(path)), pattern};
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}
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}
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}
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mux_.emplace(pattern, handler_entry{true, std::move(cb), pattern});
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return true;
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}
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request_cb serve_mux::handler(request_impl &req) const {
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auto &path = req.uri().path;
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if (req.method() != "CONNECT") {
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auto clean_path = ::nghttp2::http2::path_join(
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nullptr, 0, nullptr, 0, path.c_str(), path.size(), nullptr, 0);
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if (clean_path != path) {
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return redirect_handler(301, std::move(clean_path));
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}
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}
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auto &host = req.uri().host;
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auto cb = match(host + path);
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if (cb) {
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return cb;
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}
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cb = match(path);
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if (cb) {
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return cb;
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}
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return status_handler(404);
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}
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request_cb serve_mux::match(const std::string &path) const {
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const handler_entry *ent = nullptr;
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size_t best = 0;
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for (auto &kv : mux_) {
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auto &pattern = kv.first;
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if (!util::startsWith(path, pattern)) {
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continue;
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}
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if (path.size() == pattern.size() || pattern.back() == '/' ||
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path[pattern.size()] == '/') {
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if (!ent || best < pattern.size()) {
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best = pattern.size();
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ent = &kv.second;
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}
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}
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}
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if (ent) {
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return ent->cb;
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}
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return request_cb();
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}
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} // namespace server
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} // namespace asio_http2
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} // namespace nghttp2
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