// 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 preview_url_resource { "/_matrix/media/r0/preview_url", { "(11.7.1.5) Get information about a URL for a client" } }; static unique_buffer request_url(const string_view &urle); static json::strung parse_og(const string_view &content); static resource::response get__preview_url(client &client, const resource::request &request) { const auto &url { request.query.at("url") }; const auto &ts { request.query.get("ts", milliseconds(-1)) }; const unique_buffer content_buffer { //request_url(url) }; const string_view content { content_buffer }; const json::strung ogs { parse_og(content) }; return resource::response { client, json::object{ogs} }; } static resource::method method_get { preview_url_resource, "GET", get__preview_url }; json::strung parse_og(const string_view &content) { std::vector og; return { og.data(), og.data() + og.size() }; } unique_buffer request_url(const string_view &urle) { const unique_buffer buf { 24_KiB }; const auto url { url::decode(urle, buf) }; const auto &host { between(url, "://", "/") //TODO: grammar / rfc3986.h }; const string_view &service { split(url, "://").first }; const string_view &path { end(host), end(url) }; if(empty(host) || empty(path)) throw m::error { http::BAD_REQUEST, "M_BAD_URL", "Something was wrong with the supplied URL." }; window_buffer wb { buf + size(url) }; http::request { wb, host, "GET", path, 0, {}, { { "User-Agent", info::user_agent }, } }; const const_buffer out_head { wb.completed() }; const mutable_buffer in_head { buf + size(url) + size(out_head) }; const net::hostport remote { //TODO: fix services translation in net::dns:: host, {}, service == "https"? uint16_t(443) : uint16_t(80) }; server::request::opts sopts; sopts.http_exceptions = false; server::request request { remote, { out_head }, { in_head, mutable_buffer{} }, &sopts }; request.wait(seconds(10)); //TODO: conf const auto code { request.get() }; if(code != http::OK) return {}; assert(data(request.in.content) == data(request.in.dynamic)); return std::move(request.in.dynamic); }