mirror of
https://github.com/matrix-construct/construct
synced 2024-11-02 20:09:16 +01:00
530 lines
12 KiB
C++
530 lines
12 KiB
C++
/*
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* Copyright (C) 2016 Charybdis Development Team
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* Copyright (C) 2016 Jason Volk <jason@zemos.net>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice is present in all copies.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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namespace ircd {
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IRCD_INIT_PRIORITY(STD_CONTAINER)
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decltype(resource::resources)
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resource::resources
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{};
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} // namespace ircd
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ircd::resource &
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ircd::resource::find(string_view path)
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{
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path = rstrip(path, '/');
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auto it(resources.lower_bound(path));
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if(it == end(resources)) try
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{
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--it;
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if(it == begin(resources) || !startswith(path, rstrip(it->first, '/')))
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return *resources.at("/");
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}
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catch(const std::out_of_range &e)
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{
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throw http::error(http::code::NOT_FOUND);
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}
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// Exact file or directory match
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if(path == rstrip(it->first, '/'))
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return *it->second;
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// Directories handle all paths under them.
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if(!startswith(path, rstrip(it->first, '/')))
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{
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// Walk the iterator back to find if there is a directory prefixing this path.
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if(it == begin(resources))
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throw http::error(http::code::NOT_FOUND);
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--it;
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if(!startswith(path, rstrip(it->first, '/')))
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throw http::error(http::code::NOT_FOUND);
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}
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// Check if the resource is a directory; if not, it can only
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// handle exact path matches.
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if(~it->second->flags & it->second->DIRECTORY && path != rstrip(it->first, '/'))
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throw http::error(http::code::NOT_FOUND);
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return *it->second;
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}
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ircd::resource::resource(const string_view &path,
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opts opts)
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:resource
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{
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path, opts.description, opts
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}
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{
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}
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ircd::resource::resource(const string_view &path,
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const string_view &description,
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opts opts)
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:path{path}
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,description{description}
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,flags{opts.flags}
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,resources_it{[this, &path]
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{
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const auto iit(resources.emplace(this->path, this));
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if(!iit.second)
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throw error("resource \"%s\" already registered", path);
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return unique_const_iterator<decltype(resources)>
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{
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resources, iit.first
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};
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}()}
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{
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log::info("Registered resource \"%s\"", path.empty()? string_view{"/"} : path);
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}
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ircd::resource::~resource()
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noexcept
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{
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log::info("Unregistered resource \"%s\"", path.empty()? string_view{"/"} : path);
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}
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namespace ircd
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{
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static void verify_origin(client &client, resource::method &method, resource::request &request);
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static void authenticate(client &client, resource::method &method, resource::request &request);
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}
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void
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ircd::authenticate(client &client,
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resource::method &method,
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resource::request &request)
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try
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{
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const string_view &access_token
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{
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request.query.at("access_token")
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};
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// Sets up the query to find the access_token in the sessions room
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const m::vm::query<m::vm::where::equal> query
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{
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{ "type", "ircd.access_token" },
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{ "state_key", access_token },
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{ "room_id", m::user::sessions.room_id },
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};
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const bool result
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{
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m::vm::test(query, [&request, &access_token](const m::event &event)
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{
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// Checks if the access token has expired. Tokens are expired when
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// an m.room.redaction event is issued for the ircd.access_token
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// event. Instead of making another query here for the redaction
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// we expect the original event to be updated with the following
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// key which must be part of the redaction process.
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const json::object &unsigned_
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{
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json::get<"unsigned"_>(event)
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};
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if(unsigned_.has("redacted_because"))
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return false;
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assert(at<"state_key"_>(event) == access_token);
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request.user_id = at<"sender"_>(event);
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return true;
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})
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};
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if(!result)
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throw m::error
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{
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// When credentials are required but missing or invalid, the HTTP call will return with
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// a status of 401 and the error code, M_MISSING_TOKEN or M_UNKNOWN_TOKEN respectively.
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http::UNAUTHORIZED, "M_UNKNOWN_TOKEN", "Credentials for this method are required but invalid."
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};
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}
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catch(const std::out_of_range &e)
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{
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throw m::error
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{
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// When credentials are required but missing or invalid, the HTTP call will return with
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// a status of 401 and the error code, M_MISSING_TOKEN or M_UNKNOWN_TOKEN respectively.
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http::UNAUTHORIZED, "M_MISSING_TOKEN", "Credentials for this method are required but missing."
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};
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}
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void
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ircd::verify_origin(client &client,
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resource::method &method,
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resource::request &request)
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{
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const auto &authorization
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{
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request.head.authorization
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};
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const fmt::bsprintf<1024> uri
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{
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"%s%s%s", request.head.path, request.query? "?" : "", request.query
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};
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const auto verified
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{
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m::io::verify_x_matrix_authorization(authorization, method.name, uri, request.content)
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};
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if(!verified)
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throw m::error
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{
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http::UNAUTHORIZED, "M_INVALID_SIGNATURE", "The X-Matrix Authorization is invalid."
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};
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}
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void
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ircd::resource::operator()(client &client,
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parse::capstan &pc,
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const http::request::head &head)
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{
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auto &method(operator[](head.method));
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http::request::content content{pc, head};
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const auto pathparm
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{
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lstrip(head.path, this->path)
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};
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string_view param[8];
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const vector_view<string_view> parv
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{
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param, tokens(pathparm, '/', param)
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};
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resource::request request
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{
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head, content, head.query, parv
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};
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if(method.flags & method.REQUIRES_AUTH)
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authenticate(client, method, request);
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if(method.flags & method.VERIFY_ORIGIN)
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verify_origin(client, method, request);
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handle_request(client, method, request);
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}
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void
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ircd::resource::handle_request(client &client,
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method &method,
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resource::request &request)
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try
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{
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const auto response
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{
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method(client, request)
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};
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}
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catch(const json::not_found &e)
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{
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throw m::error
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{
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http::BAD_REQUEST, "M_BAD_JSON", "Required JSON field: %s", e.what()
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};
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}
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catch(const json::print_error &e)
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{
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throw m::error
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{
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http::INTERNAL_SERVER_ERROR, "M_NOT_JSON", "Generator Protection: %s", e.what()
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};
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}
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catch(const json::error &e)
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{
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throw m::error
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{
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http::BAD_REQUEST, "M_NOT_JSON", "%s", e.what()
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};
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}
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catch(const std::out_of_range &e)
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{
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throw m::error
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{
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http::NOT_FOUND, "M_NOT_FOUND", "%s", e.what()
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};
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}
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ircd::resource::method &
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ircd::resource::operator[](const string_view &name)
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try
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{
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return *methods.at(name);
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}
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catch(const std::out_of_range &e)
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{
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throw http::error
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{
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http::METHOD_NOT_ALLOWED
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};
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}
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ircd::resource::method::method(struct resource &resource,
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const string_view &name,
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const handler &handler,
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opts opts)
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:name{name}
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,resource{&resource}
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,function{handler}
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,flags{opts.flags}
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,methods_it{[this, &name]
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{
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const auto iit(this->resource->methods.emplace(this->name, this));
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if(!iit.second)
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throw error("resource \"%s\" already registered", name);
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return unique_const_iterator<decltype(resource::methods)>
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{
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this->resource->methods,
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iit.first
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};
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}()}
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{
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}
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ircd::resource::method::~method()
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noexcept
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{
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}
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ircd::resource::response
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ircd::resource::method::operator()(client &client,
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request &request)
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try
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{
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return function(client, request);
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}
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catch(const std::bad_function_call &e)
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{
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throw http::error
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{
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http::SERVICE_UNAVAILABLE
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};
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}
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ircd::resource::request::request(const http::request::head &head,
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http::request::content &content,
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http::query::string query,
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const vector_view<string_view> &parv)
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:json::object{content}
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,head{head}
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,content{content}
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,query{std::move(query)}
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,parv{parv}
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{
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}
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ircd::resource::response::response(client &client,
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const http::code &code)
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:response{client, json::object{"{}"}, code}
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{
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}
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ircd::resource::response::response(client &client,
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const http::code &code,
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const json::iov &members)
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:response{client, members, code}
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{
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}
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ircd::resource::response::response(client &client,
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const json::members &members,
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const http::code &code)
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:response{client, code, members}
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{
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}
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ircd::resource::response::response(client &client,
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const json::value &value,
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const http::code &code)
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:response{client, code, value}
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{
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}
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ircd::resource::response::response(client &client,
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const http::code &code,
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const json::value &value)
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try
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{
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const auto size
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{
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serialized(value)
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};
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const unique_buffer<mutable_buffer> buffer
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{
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size
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};
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switch(type(value))
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{
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case json::ARRAY:
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{
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response(client, json::array{stringify(mutable_buffer{buffer}, value)}, code);
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return;
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}
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case json::OBJECT:
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{
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response(client, json::object{stringify(mutable_buffer{buffer}, value)}, code);
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return;
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}
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default: throw m::error
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{
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http::INTERNAL_SERVER_ERROR, "M_NOT_JSON", "Cannot send json::%s as response content", type(value)
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};
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}
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}
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catch(const json::error &e)
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{
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throw m::error
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{
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http::INTERNAL_SERVER_ERROR, "M_NOT_JSON", "Generator Protection: %s", e.what()
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};
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}
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ircd::resource::response::response(client &client,
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const http::code &code,
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const json::members &members)
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try
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{
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const auto size
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{
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serialized(members)
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};
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const unique_buffer<mutable_buffer> buffer
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{
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size
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};
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const json::object object
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{
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stringify(mutable_buffer{buffer}, members)
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};
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response(client, object, code);
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}
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catch(const json::error &e)
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{
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throw m::error
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{
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http::INTERNAL_SERVER_ERROR, "M_NOT_JSON", "Generator Protection: %s", e.what()
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};
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}
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ircd::resource::response::response(client &client,
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const json::iov &members,
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const http::code &code)
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try
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{
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const auto size
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{
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serialized(members)
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};
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const unique_buffer<mutable_buffer> buffer
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{
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size
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};
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const json::object object
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{
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stringify(mutable_buffer{buffer}, members)
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};
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response(client, object, code);
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}
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catch(const json::error &e)
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{
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throw m::error
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{
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http::INTERNAL_SERVER_ERROR, "M_NOT_JSON", "Generator Protection: %s", e.what()
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};
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}
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ircd::resource::response::response(client &client,
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const json::object &object,
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const http::code &code)
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{
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const auto content_type
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{
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"application/json; charset=utf-8"
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};
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response(client, object, content_type, code);
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}
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ircd::resource::response::response(client &client,
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const json::array &array,
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const http::code &code)
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{
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const auto content_type
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{
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"application/json; charset=utf-8"
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};
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response(client, array, content_type, code);
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}
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ircd::resource::response::response(client &client,
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const string_view &str,
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const string_view &content_type,
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const http::code &code)
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{
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const auto request_time
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{
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client.request_timer.at<microseconds>().count()
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};
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char rtime[64]; const auto rtime_len
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{
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snprintf(rtime, sizeof(rtime), "%zdus",
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request_time)
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};
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http::response
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{
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code, str, write_closure(client),
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{
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{ "Content-Type", content_type },
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{ "Access-Control-Allow-Origin", "*" }, //TODO: XXX
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{ "X-IRCd-Request-Timer", string_view{rtime, size_t(rtime_len)} }
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}
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};
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log::debug("client[%s] HTTP %d %s in %ld$us; response in %ld$us (%s) content-length: %zu",
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string(remote(client)),
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int(code),
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http::status(code),
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request_time,
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(client.request_timer.at<microseconds>().count() - request_time),
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content_type,
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str.size());
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}
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