// Matrix Construct // // Copyright (C) Matrix Construct Developers, Authors & Contributors // Copyright (C) 2016-2018 Jason Volk // // Permission to use, copy, modify, and/or distribute this software for any // purpose with or without fee is hereby granted, provided that the above // copyright notice and this permission notice is present in all copies. The // full license for this software is available in the LICENSE file. #include "media.h" resource download_resource { "/_matrix/media/r0/download/", { "(11.7.1.2) download", resource::DIRECTORY, } }; resource download_resource__legacy { "/_matrix/media/v1/download/", { "(11.7.1.2) download (legacy)", resource::DIRECTORY, } }; static resource::response get__download_local(client &client, const resource::request &request, const string_view &server, const string_view &file, const m::room &room); static resource::response get__download(client &client, const resource::request &request) { if(request.parv.size() < 2) throw http::error { http::MULTIPLE_CHOICES, "/ download / domain / file" }; const auto &server { request.parv[0] }; const auto &file { request.parv[1] }; // Download doesn't require auth so if there is no user_id detected // then we download on behalf of @ircd. const m::user::id &user_id { request.user_id? m::user::id{request.user_id}: m::me.user_id }; const bool allow_remote { request.query.get("allow_remote", true) }; const m::room::id::buf room_id { download(server, file, user_id) }; return get__download_local(client, request, server, file, room_id); } static resource::response get__download_local(client &client, const resource::request &request, const string_view &server, const string_view &file, const m::room &room) { static const m::event::fetch::opts fopts { m::event::keys::include {"content"} }; const m::room::state state { room, &fopts }; // Get the file's total size size_t file_size{0}; state.get("ircd.file.stat", "size", [&file_size] (const m::event &event) { file_size = at<"content"_>(event).get("value"); }); // Get the MIME type char type_buf[64]; string_view content_type { "application/octet-stream" }; state.get("ircd.file.stat", "type", [&type_buf, &content_type] (const m::event &event) { const auto &value { unquote(at<"content"_>(event).at("value")) }; content_type = { type_buf, copy(type_buf, value) }; }); // Send HTTP head to client resource::response { client, http::OK, content_type, file_size }; size_t sent{0}, read { read_each_block(room, [&client, &sent] (const string_view &block) { sent += write_all(*client.sock, block); }) }; if(unlikely(read != file_size)) log::error { media_log, "File %s/%s [%s] size mismatch: expected %zu got %zu", server, file, string_view{room.room_id}, file_size, read }; // Have to kill client here after failing content length expectation. if(unlikely(read != file_size)) client.close(net::dc::RST, net::close_ignore); return {}; } static resource::method method_get { download_resource, "GET", get__download }; static resource::method method_get__legacy { download_resource__legacy, "GET", get__download };