// 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" using namespace ircd; m::resource download_resource { "/_matrix/media/r0/download/", { "(11.7.1.2) download", resource::DIRECTORY, } }; static m::resource::response get__download_local(client &client, const m::resource::request &request, const m::media::mxc &mxc, const m::room &room); static m::resource::response get__download(client &client, const m::resource::request &request) { if(request.parv.size() < 2) throw http::error { http::MULTIPLE_CHOICES, "/ download / domain / file" }; char url_buf[2][256]; const m::media::mxc mxc { url::decode(url_buf[0], request.parv[0]), url::decode(url_buf[1], 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() }; const bool allow_remote { request.query.get("allow_remote", true) }; const m::room::id::buf room_id { m::media::file::download(mxc, user_id) }; return get__download_local(client, request, mxc, room_id); } static m::resource::response get__download_local(client &client, const m::resource::request &request, const m::media::mxc &mxc, 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("bytes"); }); // 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 json::string &value { at<"content"_>(event).at("mime_type") }; content_type = { type_buf, copy(type_buf, value) }; }); static const auto &addl_headers { "Cache-Control: public, max-age=31536000, immutable\r\n"_sv }; // Send HTTP head to client m::resource::response { client, http::OK, content_type, file_size, addl_headers, }; size_t sent{0}, read { m::media::file::read(room, [&client, &sent] (const string_view &block) { sent += write_all(*client.sock, block); }) }; if(unlikely(read != file_size)) log::error { m::media::log, "File %s/%s [%s] size mismatch: expected %zu got %zu", mxc.server, mxc.mediaid, 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 m::resource::method method_get { download_resource, "GET", get__download, { m::resource::method::flag(0), // flags 45s, // timeout } };