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|---|---|---|---|
| 1 | /* Copyright 2022-2024 Jan-Michael Brummer | ||
| 2 | * | ||
| 3 | * This program is free software: you can redistribute it and/or modify | ||
| 4 | * it under the terms of the GNU Lesser General Public License as published by | ||
| 5 | * the Free Software Foundation, either version 3 of the License, or | ||
| 6 | * (at your option) any later version. | ||
| 7 | * | ||
| 8 | * This program is distributed in the hope that it will be useful, | ||
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 11 | * GNU Lesser General Public License for more details. | ||
| 12 | * | ||
| 13 | * You should have received a copy of the GNU Lesser General Public License | ||
| 14 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| 15 | */ | ||
| 16 | |||
| 17 | #include <config.h> | ||
| 18 | |||
| 19 | #include <string.h> | ||
| 20 | |||
| 21 | #include <glib.h> | ||
| 22 | #include <glib/gi18n.h> | ||
| 23 | #include <gio/gio.h> | ||
| 24 | |||
| 25 | #include <libsoup/soup.h> | ||
| 26 | |||
| 27 | #include "msg-input-stream.h" | ||
| 28 | #include "msg-service.h" | ||
| 29 | |||
| 30 | static void msg_input_stream_seekable_iface_init (GSeekableIface *seekable_iface); | ||
| 31 | |||
| 32 | struct MsgInputStreamPrivate { | ||
| 33 | char *uri; | ||
| 34 | MsgService *service; | ||
| 35 | SoupMessage *msg; | ||
| 36 | GInputStream *stream; | ||
| 37 | |||
| 38 | char *range; | ||
| 39 | goffset request_offset; | ||
| 40 | goffset offset; | ||
| 41 | }; | ||
| 42 | |||
| 43 |
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22 | G_DEFINE_TYPE_WITH_CODE (MsgInputStream, msg_input_stream, G_TYPE_INPUT_STREAM, |
| 44 | G_ADD_PRIVATE (MsgInputStream) | ||
| 45 | G_IMPLEMENT_INTERFACE (G_TYPE_SEEKABLE, | ||
| 46 | msg_input_stream_seekable_iface_init)) | ||
| 47 | |||
| 48 | static void | ||
| 49 | 2 | msg_input_stream_init (MsgInputStream *stream) | |
| 50 | { | ||
| 51 | 2 | stream->priv = msg_input_stream_get_instance_private (stream); | |
| 52 | 2 | } | |
| 53 | |||
| 54 | static void | ||
| 55 | 2 | msg_input_stream_finalize (GObject *object) | |
| 56 | { | ||
| 57 | 2 | MsgInputStream *stream = MSG_INPUT_STREAM (object); | |
| 58 | 2 | MsgInputStreamPrivate *priv = stream->priv; | |
| 59 | |||
| 60 |
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2 | g_clear_pointer (&priv->uri, g_free); |
| 61 |
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2 | g_clear_object (&priv->service); |
| 62 |
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2 | g_clear_object (&priv->msg); |
| 63 |
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2 | g_clear_object (&priv->stream); |
| 64 | 2 | g_free (priv->range); | |
| 65 | |||
| 66 | 2 | G_OBJECT_CLASS (msg_input_stream_parent_class)->finalize (object); | |
| 67 | 2 | } | |
| 68 | |||
| 69 | /** | ||
| 70 | * msg_input_stream_new: | ||
| 71 | * @service: a #MsgService | ||
| 72 | * @uri: a #GUri | ||
| 73 | * | ||
| 74 | * Prepares to send a GET request for @uri on @session, and returns a | ||
| 75 | * #GInputStream that can be used to read the response. | ||
| 76 | * | ||
| 77 | * The request will not be sent until the first read call; if you need | ||
| 78 | * to look at the status code or response headers before reading the | ||
| 79 | * body, you can use msg_input_stream_send() or | ||
| 80 | * msg_input_stream_send_async() to force the message to be | ||
| 81 | * sent and the response headers read. | ||
| 82 | * | ||
| 83 | * Returns: (transfer full): a new #GInputStream. | ||
| 84 | **/ | ||
| 85 | GInputStream * | ||
| 86 | 2 | msg_input_stream_new (MsgService *service, | |
| 87 | char *uri) | ||
| 88 | { | ||
| 89 | MsgInputStream *stream; | ||
| 90 | MsgInputStreamPrivate *priv; | ||
| 91 | |||
| 92 | 2 | stream = g_object_new (MSG_TYPE_INPUT_STREAM, NULL); | |
| 93 | 2 | priv = stream->priv; | |
| 94 | |||
| 95 | 2 | priv->service = g_object_ref (service); | |
| 96 | 2 | priv->uri = g_strdup (uri); | |
| 97 | |||
| 98 | 2 | return G_INPUT_STREAM (stream); | |
| 99 | } | ||
| 100 | |||
| 101 | static void | ||
| 102 | ✗ | on_restarted (SoupMessage *msg, | |
| 103 | __attribute__ ((unused)) gpointer user_data) | ||
| 104 | { | ||
| 105 | ✗ | SoupMessageHeaders *headers = soup_message_get_request_headers (msg); | |
| 106 | ✗ | soup_message_headers_remove (headers, "Authorization"); | |
| 107 | ✗ | } | |
| 108 | |||
| 109 | static SoupMessage * | ||
| 110 | 3 | msg_input_stream_ensure_msg (GInputStream *stream) | |
| 111 | { | ||
| 112 | 3 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (stream)->priv; | |
| 113 | |||
| 114 |
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3 | if (!priv->msg){ |
| 115 | 2 | priv->msg = msg_service_build_message (MSG_SERVICE (priv->service), "GET", priv->uri, NULL, FALSE); | |
| 116 | 2 | g_signal_connect (G_OBJECT (priv->msg), "restarted", G_CALLBACK (on_restarted), NULL); | |
| 117 | 2 | msg_authorizer_process_request (msg_service_get_authorizer (priv->service), priv->msg); | |
| 118 | |||
| 119 | 2 | priv->offset = 0; | |
| 120 | } | ||
| 121 | |||
| 122 | |||
| 123 |
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3 | if (priv->range) |
| 124 | 2 | soup_message_headers_replace (soup_message_get_request_headers (priv->msg), | |
| 125 | 2 | "Range", priv->range); | |
| 126 | |||
| 127 | 3 | return priv->msg; | |
| 128 | } | ||
| 129 | |||
| 130 | static void | ||
| 131 | ✗ | read_callback (GObject *object, | |
| 132 | GAsyncResult *result, | ||
| 133 | gpointer user_data) | ||
| 134 | { | ||
| 135 | ✗ | GTask *task = user_data; | |
| 136 | ✗ | GInputStream *vfsstream = g_task_get_source_object (task); | |
| 137 | ✗ | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (vfsstream)->priv; | |
| 138 | ✗ | GError *error = NULL; | |
| 139 | gssize nread; | ||
| 140 | |||
| 141 | ✗ | nread = g_input_stream_read_finish (G_INPUT_STREAM (object), result, &error); | |
| 142 | ✗ | if (nread >= 0){ | |
| 143 | ✗ | priv->offset += nread; | |
| 144 | ✗ | g_task_return_int (task, nread); | |
| 145 | } else | ||
| 146 | ✗ | g_task_return_error (task, error); | |
| 147 | ✗ | g_object_unref (task); | |
| 148 | ✗ | } | |
| 149 | |||
| 150 | typedef struct { | ||
| 151 | gpointer buffer; | ||
| 152 | gsize count; | ||
| 153 | } ReadAfterSendData; | ||
| 154 | |||
| 155 | static void | ||
| 156 | 1 | read_send_callback (GObject *object, | |
| 157 | GAsyncResult *result, | ||
| 158 | gpointer user_data) | ||
| 159 | { | ||
| 160 | 1 | GTask *task = user_data; | |
| 161 | 1 | GInputStream *vfsstream = g_task_get_source_object (task); | |
| 162 | 1 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (vfsstream)->priv; | |
| 163 | 1 | ReadAfterSendData *rasd = g_task_get_task_data (task); | |
| 164 | 1 | GError *error = NULL; | |
| 165 | |||
| 166 | 1 | priv->stream = soup_session_send_finish (SOUP_SESSION (object), result, &error); | |
| 167 |
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1 | if (!priv->stream){ |
| 168 | ✗ | g_task_return_error (task, error); | |
| 169 | ✗ | g_object_unref (task); | |
| 170 | 1 | return; | |
| 171 | } | ||
| 172 |
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1 | if (!SOUP_STATUS_IS_SUCCESSFUL (soup_message_get_status (priv->msg))){ |
| 173 |
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1 | if (soup_message_get_status (priv->msg) == SOUP_STATUS_REQUESTED_RANGE_NOT_SATISFIABLE){ |
| 174 | ✗ | g_input_stream_close (priv->stream, NULL, NULL); | |
| 175 | ✗ | g_task_return_int (task, 0); | |
| 176 | ✗ | g_clear_object (&priv->stream); | |
| 177 | ✗ | g_object_unref (task); | |
| 178 | ✗ | return; | |
| 179 | } | ||
| 180 | 2 | g_task_return_new_error (task, | |
| 181 | G_IO_ERROR, | ||
| 182 | 1 | soup_message_get_status (priv->msg), | |
| 183 | 1 | _("HTTP Error: %s"), soup_message_get_reason_phrase (priv->msg)); | |
| 184 | 1 | g_object_unref (task); | |
| 185 | 1 | return; | |
| 186 | } | ||
| 187 | ✗ | if (priv->range){ | |
| 188 | gboolean status; | ||
| 189 | goffset start, end; | ||
| 190 | |||
| 191 | ✗ | status = soup_message_headers_get_content_range (soup_message_get_response_headers (priv->msg), | |
| 192 | &start, &end, NULL); | ||
| 193 | ✗ | if (!status || start != priv->request_offset){ | |
| 194 | ✗ | g_task_return_new_error (task, | |
| 195 | G_IO_ERROR, | ||
| 196 | G_IO_ERROR_FAILED, | ||
| 197 | ✗ | _("Error seeking in stream")); | |
| 198 | ✗ | g_object_unref (task); | |
| 199 | ✗ | return; | |
| 200 | } | ||
| 201 | } | ||
| 202 | |||
| 203 | ✗ | g_input_stream_read_async (priv->stream, rasd->buffer, rasd->count, | |
| 204 | g_task_get_priority (task), | ||
| 205 | g_task_get_cancellable (task), | ||
| 206 | read_callback, task); | ||
| 207 | } | ||
| 208 | |||
| 209 | static gssize | ||
| 210 | 1 | msg_input_stream_read_fn (GInputStream *stream, | |
| 211 | void *buffer, | ||
| 212 | gsize count, | ||
| 213 | GCancellable *cancellable, | ||
| 214 | GError **error) | ||
| 215 | { | ||
| 216 | 1 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (stream)->priv; | |
| 217 | |||
| 218 |
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1 | if (!priv->stream) { |
| 219 | 1 | msg_input_stream_ensure_msg (stream); | |
| 220 | |||
| 221 | 1 | retry: | |
| 222 | 1 | priv->stream = soup_session_send (msg_service_get_session (priv->service), priv->msg, cancellable, error); | |
| 223 |
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1 | if (msg_service_handle_rate_limiting (priv->msg)) |
| 224 | ✗ | goto retry; | |
| 225 | } | ||
| 226 | |||
| 227 | 1 | return g_input_stream_read (priv->stream, buffer, count, cancellable, error); | |
| 228 | } | ||
| 229 | |||
| 230 | static void | ||
| 231 | 1 | msg_input_stream_read_async (GInputStream *stream, | |
| 232 | void *buffer, | ||
| 233 | gsize count, | ||
| 234 | int io_priority, | ||
| 235 | GCancellable *cancellable, | ||
| 236 | GAsyncReadyCallback callback, | ||
| 237 | gpointer user_data) | ||
| 238 | { | ||
| 239 | 1 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (stream)->priv; | |
| 240 | GTask *task; | ||
| 241 | |||
| 242 | 1 | task = g_task_new (stream, cancellable, callback, user_data); | |
| 243 | 1 | g_task_set_priority (task, io_priority); | |
| 244 | |||
| 245 |
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1 | if (!priv->stream) { |
| 246 | ReadAfterSendData *rasd; | ||
| 247 | |||
| 248 | 1 | rasd = g_new (ReadAfterSendData, 1); | |
| 249 | 1 | rasd->buffer = buffer; | |
| 250 | 1 | rasd->count = count; | |
| 251 | 1 | g_task_set_task_data (task, rasd, g_free); | |
| 252 | |||
| 253 | 1 | msg_input_stream_ensure_msg (stream); | |
| 254 | 1 | soup_session_send_async (msg_service_get_session (priv->service), priv->msg, G_PRIORITY_DEFAULT, | |
| 255 | cancellable, read_send_callback, task); | ||
| 256 | 1 | return; | |
| 257 | } | ||
| 258 | |||
| 259 | ✗ | g_input_stream_read_async (priv->stream, buffer, count, io_priority, | |
| 260 | cancellable, read_callback, task); | ||
| 261 | } | ||
| 262 | |||
| 263 | static gssize | ||
| 264 | 1 | msg_input_stream_read_finish (GInputStream *stream, | |
| 265 | GAsyncResult *result, | ||
| 266 | GError **error) | ||
| 267 | { | ||
| 268 |
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1 | g_return_val_if_fail (g_task_is_valid (result, stream), -1); |
| 269 | |||
| 270 | 1 | return g_task_propagate_int (G_TASK (result), error); | |
| 271 | } | ||
| 272 | |||
| 273 | static void | ||
| 274 | 1 | close_callback (GObject *object, | |
| 275 | GAsyncResult *result, | ||
| 276 | gpointer user_data) | ||
| 277 | { | ||
| 278 | 1 | GTask *task = user_data; | |
| 279 | 1 | GError *error = NULL; | |
| 280 | |||
| 281 |
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1 | if (g_input_stream_close_finish (G_INPUT_STREAM (object), result, &error)) |
| 282 | 1 | g_task_return_boolean (task, TRUE); | |
| 283 | else | ||
| 284 | ✗ | g_task_return_error (task, error); | |
| 285 | 1 | g_object_unref (task); | |
| 286 | 1 | } | |
| 287 | |||
| 288 | static void | ||
| 289 | 1 | msg_input_stream_close_async (GInputStream *stream, | |
| 290 | int io_priority, | ||
| 291 | GCancellable *cancellable, | ||
| 292 | GAsyncReadyCallback callback, | ||
| 293 | gpointer user_data) | ||
| 294 | { | ||
| 295 | 1 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (stream)->priv; | |
| 296 | GTask *task; | ||
| 297 | |||
| 298 | 1 | task = g_task_new (stream, cancellable, callback, user_data); | |
| 299 | 1 | g_task_set_priority (task, io_priority); | |
| 300 | |||
| 301 |
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1 | if (priv->stream == NULL){ |
| 302 | ✗ | g_task_return_boolean (task, TRUE); | |
| 303 | ✗ | return; | |
| 304 | } | ||
| 305 | |||
| 306 | 1 | g_input_stream_close_async (priv->stream, io_priority, | |
| 307 | cancellable, close_callback, task); | ||
| 308 | } | ||
| 309 | |||
| 310 | static gboolean | ||
| 311 | 1 | msg_input_stream_close_finish (GInputStream *stream, | |
| 312 | GAsyncResult *result, | ||
| 313 | GError **error) | ||
| 314 | { | ||
| 315 |
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1 | g_return_val_if_fail (g_task_is_valid (result, stream), -1); |
| 316 | |||
| 317 | 1 | return g_task_propagate_boolean (G_TASK (result), error); | |
| 318 | } | ||
| 319 | |||
| 320 | static goffset | ||
| 321 | 1 | msg_input_stream_tell (GSeekable *seekable) | |
| 322 | { | ||
| 323 | 1 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (seekable)->priv; | |
| 324 | |||
| 325 | 1 | return priv->offset; | |
| 326 | } | ||
| 327 | |||
| 328 | static gboolean | ||
| 329 | 1 | msg_input_stream_can_seek (__attribute__ ((unused)) GSeekable *seekable) | |
| 330 | { | ||
| 331 | 1 | return TRUE; | |
| 332 | } | ||
| 333 | |||
| 334 | static gboolean | ||
| 335 | 2 | msg_input_stream_seek (GSeekable *seekable, | |
| 336 | goffset offset, | ||
| 337 | GSeekType type, | ||
| 338 | __attribute__ ((unused)) GCancellable *cancellable, | ||
| 339 | GError **error) | ||
| 340 | { | ||
| 341 | 2 | GInputStream *stream = G_INPUT_STREAM (seekable); | |
| 342 | 2 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (seekable)->priv; | |
| 343 | |||
| 344 |
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2 | if (type == G_SEEK_END && priv->msg){ |
| 345 | 1 | goffset content_length = soup_message_headers_get_content_length (soup_message_get_response_headers (priv->msg)); | |
| 346 | |||
| 347 |
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1 | if (content_length){ |
| 348 | 1 | type = G_SEEK_SET; | |
| 349 | 1 | offset = priv->request_offset + content_length + offset; | |
| 350 | } | ||
| 351 | } | ||
| 352 | |||
| 353 |
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2 | if (type == G_SEEK_END){ |
| 354 | /* We could send "bytes=-offset", but since we don't know the | ||
| 355 | * Content-Length, we wouldn't be able to answer a tell() | ||
| 356 | * properly after that. We could maybe find the Content-Length | ||
| 357 | * by doing a HEAD... but that would require blocking. | ||
| 358 | */ | ||
| 359 | ✗ | g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, | |
| 360 | "G_SEEK_END not supported"); | ||
| 361 | ✗ | return FALSE; | |
| 362 | } | ||
| 363 | |||
| 364 |
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2 | if (!g_input_stream_set_pending (stream, error)) |
| 365 | ✗ | return FALSE; | |
| 366 | |||
| 367 |
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2 | if (priv->stream){ |
| 368 |
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1 | if (!g_input_stream_close (priv->stream, NULL, error)) |
| 369 | ✗ | return FALSE; | |
| 370 |
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1 | g_clear_object (&priv->stream); |
| 371 | } | ||
| 372 | |||
| 373 |
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2 | g_clear_pointer (&priv->range, g_free); |
| 374 | |||
| 375 |
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2 | switch (type){ |
| 376 | 1 | case G_SEEK_CUR: | |
| 377 | 1 | offset += priv->offset; | |
| 378 | /* fall through */ | ||
| 379 | |||
| 380 | 2 | case G_SEEK_SET: | |
| 381 | 2 | priv->range = g_strdup_printf ("bytes=%"G_GUINT64_FORMAT "-", (guint64)offset); | |
| 382 | 2 | priv->request_offset = offset; | |
| 383 | 2 | priv->offset = offset; | |
| 384 | 2 | break; | |
| 385 | |||
| 386 | ✗ | default: | |
| 387 | ✗ | g_return_val_if_reached (FALSE); | |
| 388 | } | ||
| 389 | |||
| 390 | 2 | g_input_stream_clear_pending (stream); | |
| 391 | 2 | return TRUE; | |
| 392 | } | ||
| 393 | |||
| 394 | static gboolean | ||
| 395 | 1 | msg_input_stream_can_truncate (__attribute__ ((unused)) GSeekable *seekable) | |
| 396 | { | ||
| 397 | 1 | return FALSE; | |
| 398 | } | ||
| 399 | |||
| 400 | static gboolean | ||
| 401 | 1 | msg_input_stream_truncate (__attribute__ ((unused)) GSeekable *seekable, | |
| 402 | __attribute__ ((unused)) goffset offset, | ||
| 403 | __attribute__ ((unused)) GCancellable *cancellable, | ||
| 404 | GError **error) | ||
| 405 | { | ||
| 406 | 1 | g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_NOT_SUPPORTED, | |
| 407 | "Truncate not allowed on input stream"); | ||
| 408 | 1 | return FALSE; | |
| 409 | } | ||
| 410 | |||
| 411 | /** | ||
| 412 | * msg_input_stream_get_message: | ||
| 413 | * @stream: a #GInputStream | ||
| 414 | * | ||
| 415 | * Gets corresponding SoupMessage | ||
| 416 | * | ||
| 417 | * Returns: (transfer full): a #SoupMessage | ||
| 418 | */ | ||
| 419 | SoupMessage * | ||
| 420 | 1 | msg_input_stream_get_message (GInputStream *stream) | |
| 421 | { | ||
| 422 | 1 | MsgInputStreamPrivate *priv = MSG_INPUT_STREAM (stream)->priv; | |
| 423 | |||
| 424 | 1 | msg_input_stream_ensure_msg (stream); | |
| 425 | 1 | return g_object_ref (priv->msg); | |
| 426 | } | ||
| 427 | |||
| 428 | static void | ||
| 429 | 2 | msg_input_stream_class_init (MsgInputStreamClass *klass) | |
| 430 | { | ||
| 431 | 2 | GObjectClass *gobject_class = G_OBJECT_CLASS (klass); | |
| 432 | 2 | GInputStreamClass *stream_class = G_INPUT_STREAM_CLASS (klass); | |
| 433 | |||
| 434 | 2 | gobject_class->finalize = msg_input_stream_finalize; | |
| 435 | |||
| 436 | 2 | stream_class->read_fn = msg_input_stream_read_fn; | |
| 437 | 2 | stream_class->read_async = msg_input_stream_read_async; | |
| 438 | 2 | stream_class->read_finish = msg_input_stream_read_finish; | |
| 439 | 2 | stream_class->close_async = msg_input_stream_close_async; | |
| 440 | 2 | stream_class->close_finish = msg_input_stream_close_finish; | |
| 441 | 2 | } | |
| 442 | |||
| 443 | static void | ||
| 444 | 2 | msg_input_stream_seekable_iface_init (GSeekableIface *seekable_iface) | |
| 445 | { | ||
| 446 | 2 | seekable_iface->tell = msg_input_stream_tell; | |
| 447 | 2 | seekable_iface->can_seek = msg_input_stream_can_seek; | |
| 448 | 2 | seekable_iface->seek = msg_input_stream_seek; | |
| 449 | 2 | seekable_iface->can_truncate = msg_input_stream_can_truncate; | |
| 450 | 2 | seekable_iface->truncate_fn = msg_input_stream_truncate; | |
| 451 | 2 | } | |
| 452 |