using Gee; using Gtk; using Dino.Entities; using Xmpp; namespace Dino.Plugins.HttpFiles { public class FileProvider : Dino.FileProvider, Object { private StreamInteractor stream_interactor; private Dino.Database dino_db; private Soup.Session session; private static Regex http_url_regex = /^https?:\/\/([^\s#]*)$/; // Spaces are invalid in URLs and we can't use fragments for downloads private static Regex omemo_url_regex = /^aesgcm:\/\/(.*)#(([A-Fa-f0-9]{2}){48}|([A-Fa-f0-9]{2}){44})$/; public FileProvider(StreamInteractor stream_interactor, Dino.Database dino_db) { this.stream_interactor = stream_interactor; this.dino_db = dino_db; this.session = new Soup.Session(); session.user_agent = @"Dino/$(Dino.get_short_version()) "; stream_interactor.get_module(MessageProcessor.IDENTITY).received_pipeline.connect(new ReceivedMessageListener(this)); } private class ReceivedMessageListener : MessageListener { public string[] after_actions_const = new string[]{ "STORE" }; public override string action_group { get { return "MESSAGE_REINTERPRETING"; } } public override string[] after_actions { get { return after_actions_const; } } private FileProvider outer; private StreamInteractor stream_interactor; public ReceivedMessageListener(FileProvider outer) { this.outer = outer; this.stream_interactor = outer.stream_interactor; } public override async bool run(Entities.Message message, Xmpp.MessageStanza stanza, Conversation conversation) { string? oob_url = Xmpp.Xep.OutOfBandData.get_url_from_message(stanza); bool normal_file = oob_url != null && oob_url == message.body && FileProvider.http_url_regex.match(message.body); bool omemo_file = FileProvider.omemo_url_regex.match(message.body); if (normal_file || omemo_file) { outer.on_file_message(message, conversation); return true; } return false; } } private class LimitInputStream : InputStream, PollableInputStream { InputStream inner; int64 remaining_size; public LimitInputStream(InputStream inner, int64 max_size) { this.inner = inner; this.remaining_size = max_size; } public bool can_poll() { return inner is PollableInputStream && ((PollableInputStream)inner).can_poll(); } public PollableSource create_source(Cancellable? cancellable = null) { if (!can_poll()) throw new IOError.NOT_SUPPORTED("Stream is not pollable"); return ((PollableInputStream)inner).create_source(cancellable); } public bool is_readable() { if (!can_poll()) throw new IOError.NOT_SUPPORTED("Stream is not pollable"); return remaining_size <= 0 || ((PollableInputStream)inner).is_readable(); } private ssize_t check_limit(ssize_t read) throws IOError { this.remaining_size -= read; if (remaining_size < 0) throw new IOError.FAILED("Stream length exceeded limit"); return read; } public override ssize_t read(uint8[] buffer, Cancellable? cancellable = null) throws IOError { return check_limit(inner.read(buffer, cancellable)); } public override async ssize_t read_async(uint8[]? buffer, int io_priority = GLib.Priority.DEFAULT, Cancellable? cancellable = null) throws IOError { return check_limit(yield inner.read_async(buffer, io_priority, cancellable)); } public ssize_t read_nonblocking_fn(uint8[] buffer) throws Error { if (!is_readable()) throw new IOError.WOULD_BLOCK("Stream is not readable"); return read(buffer); } public override bool close(Cancellable? cancellable = null) throws IOError { return inner.close(cancellable); } public override async bool close_async(int io_priority = GLib.Priority.DEFAULT, Cancellable? cancellable = null) throws IOError { return yield inner.close_async(io_priority, cancellable); } } private void on_file_message(Entities.Message message, Conversation conversation) { var additional_info = message.id.to_string(); var receive_data = new HttpFileReceiveData(); receive_data.url = message.body; var file_meta = new HttpFileMeta(); file_meta.file_name = extract_file_name_from_url(message.body); file_meta.message = message; file_incoming(additional_info, message.from, message.time, message.local_time, conversation, receive_data, file_meta); } public async FileMeta get_meta_info(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) throws FileReceiveError { HttpFileReceiveData? http_receive_data = receive_data as HttpFileReceiveData; if (http_receive_data == null) return file_meta; var head_message = new Soup.Message("HEAD", http_receive_data.url); head_message.request_headers.append("Accept-Encoding", "identity"); try { #if SOUP_3_0 yield session.send_async(head_message, GLib.Priority.LOW, null); #else yield session.send_async(head_message, null); #endif } catch (Error e) { throw new FileReceiveError.GET_METADATA_FAILED("HEAD request failed"); } string? content_type = null, content_length = null; head_message.response_headers.foreach((name, val) => { if (name.down() == "content-type") content_type = val; if (name.down() == "content-length") content_length = val; }); file_meta.mime_type = content_type; if (content_length != null) { file_meta.size = int64.parse(content_length); } return file_meta; } public Encryption get_encryption(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) { return Encryption.NONE; } public async InputStream download(FileTransfer file_transfer, FileReceiveData receive_data, FileMeta file_meta) throws FileReceiveError { HttpFileReceiveData? http_receive_data = receive_data as HttpFileReceiveData; if (http_receive_data == null) assert(false); var get_message = new Soup.Message("GET", http_receive_data.url); try { #if SOUP_3_0 InputStream stream = yield session.send_async(get_message, GLib.Priority.LOW, file_transfer.cancellable); #else InputStream stream = yield session.send_async(get_message, file_transfer.cancellable); #endif if (file_meta.size != -1) { return new LimitInputStream(stream, file_meta.size); } else { return stream; } } catch (Error e) { throw new FileReceiveError.DOWNLOAD_FAILED("Downloading file error: %s".printf(e.message)); } } public FileMeta get_file_meta(FileTransfer file_transfer) throws FileReceiveError { Conversation? conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation(file_transfer.counterpart.bare_jid, file_transfer.account); if (conversation == null) throw new FileReceiveError.GET_METADATA_FAILED("No conversation"); Message? message = stream_interactor.get_module(MessageStorage.IDENTITY).get_message_by_id(int.parse(file_transfer.info), conversation); if (message == null) throw new FileReceiveError.GET_METADATA_FAILED("No message"); var file_meta = new HttpFileMeta(); file_meta.size = file_transfer.size; file_meta.mime_type = file_transfer.mime_type; file_meta.file_name = extract_file_name_from_url(message.body); file_meta.message = message; return file_meta; } public FileReceiveData? get_file_receive_data(FileTransfer file_transfer) { Conversation? conversation = stream_interactor.get_module(ConversationManager.IDENTITY).get_conversation(file_transfer.counterpart.bare_jid, file_transfer.account); if (conversation == null) return null; Message? message = stream_interactor.get_module(MessageStorage.IDENTITY).get_message_by_id(int.parse(file_transfer.info), conversation); if (message == null) return null; var receive_data = new HttpFileReceiveData(); receive_data.url = message.body; return receive_data; } private string extract_file_name_from_url(string url) { string ret = url; if (ret.contains("#")) { ret = ret.substring(0, ret.last_index_of("#")); } ret = Uri.unescape_string(ret.substring(ret.last_index_of("/") + 1)); return ret; } public int get_id() { return 0; } } }