nghttp2/src/asio_server_serve_mux.cc

177 lines
5.0 KiB
C++
Raw Normal View History

/*
* nghttp2 - HTTP/2 C Library
*
* Copyright (c) 2015 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 "asio_server_serve_mux.h"
#include "asio_http2_handler.h"
#include "util.h"
#include "http2.h"
namespace nghttp2 {
namespace asio_http2 {
namespace server {
namespace {
std::string create_html(int status_code) {
std::string res;
res.reserve(512);
auto status = ::nghttp2::http2::get_status_string(status_code);
res += "<!DOCTYPE html><html lang=en><title>";
res += status;
res += "</title><body><h1>";
res += status;
res += "</h1></body></html>";
return res;
}
} // namespace
namespace {
request_cb redirect_handler(int status_code, std::string path) {
return [status_code, path](const request &req, const response &res) {
auto &uref = req.impl().uri();
auto newloc = uref.scheme;
newloc += "://";
newloc += uref.host;
newloc += path;
if (!uref.raw_query.empty()) {
newloc += "?";
newloc += uref.raw_query;
}
auto html = create_html(status_code);
header_map h;
h.emplace("location", header_value{std::move(newloc)});
h.emplace("content-length", header_value{util::utos(html.size())});
h.emplace("content-type", header_value{"text/html; charset=utf-8"});
res.write_head(status_code, std::move(h));
res.end(std::move(html));
};
}
} // namespace
namespace {
request_cb status_handler(int status_code) {
return [status_code](const request &req, const response &res) {
auto html = create_html(status_code);
header_map h;
h.emplace("content-length", header_value{util::utos(html.size())});
h.emplace("content-type", header_value{"text/html; charset=utf-8"});
res.write_head(status_code, std::move(h));
res.end(std::move(html));
};
}
} // namespace
bool serve_mux::handle(std::string pattern, request_cb cb) {
if (pattern.empty() || !cb) {
return false;
}
auto it = mux_.find(pattern);
if (it != std::end(mux_) && (*it).second.user_defined) {
return false;
}
// if pattern ends with '/' (e.g., /foo/), add implicit permanent
// redirect for '/foo'.
if (pattern.size() >= 2 && pattern.back() == '/') {
auto redirect_pattern = pattern.substr(0, pattern.size() - 1);
auto it = mux_.find(redirect_pattern);
if (it == std::end(mux_) || !(*it).second.user_defined) {
std::string path;
if (pattern[0] == '/') {
path = pattern;
} else {
// skip host part
path = pattern.substr(pattern.find('/'));
}
if (it == std::end(mux_)) {
mux_.emplace(std::move(redirect_pattern),
handler_entry{false,
redirect_handler(301, std::move(path)),
pattern});
} else {
(*it).second = handler_entry{
false, redirect_handler(301, std::move(path)), pattern};
}
}
}
mux_.emplace(pattern, handler_entry{true, std::move(cb), pattern});
return true;
}
request_cb serve_mux::handler(request_impl &req) const {
auto &path = req.uri().path;
if (req.method() != "CONNECT") {
auto clean_path = ::nghttp2::http2::path_join(
nullptr, 0, nullptr, 0, path.c_str(), path.size(), nullptr, 0);
if (clean_path != path) {
return redirect_handler(301, std::move(clean_path));
}
}
auto &host = req.uri().host;
auto cb = match(host + path);
if (cb) {
return cb;
}
cb = match(path);
if (cb) {
return cb;
}
return status_handler(404);
}
request_cb serve_mux::match(const std::string &path) const {
const handler_entry *ent = nullptr;
size_t best = 0;
for (auto &kv : mux_) {
auto &pattern = kv.first;
if (!util::startsWith(path, pattern)) {
continue;
}
if (path.size() == pattern.size() || pattern.back() == '/' ||
path[pattern.size()] == '/') {
if (!ent || best < pattern.size()) {
best = pattern.size();
ent = &kv.second;
}
}
}
if (ent) {
return ent->cb;
}
return request_cb();
}
} // namespace server
} // namespace asio_http2
} // namespace nghttp2