/* Attempts to push forward the writing side of @msg's I/O. Returns
* %TRUE if it manages to make some progress, and it is likely that
* further progress can be made. Returns %FALSE if it has reached a
* stopping point of some sort (need input from the application,
* socket not writable, write is complete, etc).
*/
static gboolean
io_write (SoupMessage *msg, gboolean blocking,
GCancellable *cancellable, GError **error)
{
SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);
SoupMessageIOData *io = priv->io_data;
SoupBuffer *chunk;
gssize nwrote;
if (io->async_close_error) {
g_propagate_error (error, io->async_close_error);
io->async_close_error = NULL;
return FALSE;
} else if (io->async_close_wait) {
g_set_error_literal (error, G_IO_ERROR,
G_IO_ERROR_WOULD_BLOCK,
_("Operation would block"));
return FALSE;
}
switch (io->write_state) {
case SOUP_MESSAGE_IO_STATE_HEADERS:
if (io->mode == SOUP_MESSAGE_IO_SERVER &&
io->read_state == SOUP_MESSAGE_IO_STATE_BLOCKING &&
msg->status_code == 0) {
/* Client requested "Expect: 100-continue", and
* server did not set an error.
*/
soup_message_set_status (msg, SOUP_STATUS_CONTINUE);
}
if (!io->write_buf->len) {
io->get_headers_cb (msg, io->write_buf,
&io->write_encoding,
io->header_data);
}
while (io->written < io->write_buf->len) {
nwrote = g_pollable_stream_write (io->ostream,
io->write_buf->str + io->written,
io->write_buf->len - io->written,
blocking,
cancellable, error);
if (nwrote == -1)
return FALSE;
io->written += nwrote;
}
io->written = 0;
g_string_truncate (io->write_buf, 0);
if (io->mode == SOUP_MESSAGE_IO_SERVER &&
SOUP_STATUS_IS_INFORMATIONAL (msg->status_code)) {
if (msg->status_code == SOUP_STATUS_CONTINUE) {
/* Stop and wait for the body now */
io->write_state =
SOUP_MESSAGE_IO_STATE_BLOCKING;
io->read_state = SOUP_MESSAGE_IO_STATE_BODY_START;
} else {
/* We just wrote a 1xx response
* header, so stay in STATE_HEADERS.
* (The caller will pause us from the
* wrote_informational callback if he
* is not ready to send the final
* response.)
*/
}
soup_message_wrote_informational (msg);
/* If this was "101 Switching Protocols", then
* the server probably stole the connection...
*/
if (io != priv->io_data)
return FALSE;
soup_message_cleanup_response (msg);
break;
}
if (io->write_encoding == SOUP_ENCODING_CONTENT_LENGTH) {
SoupMessageHeaders *hdrs =
(io->mode == SOUP_MESSAGE_IO_CLIENT) ?
msg->request_headers : msg->response_headers;
io->write_length = soup_message_headers_get_content_length (hdrs);
}
if (io->mode == SOUP_MESSAGE_IO_CLIENT &&
soup_message_headers_get_expectations (msg->request_headers) & SOUP_EXPECTATION_CONTINUE) {
/* Need to wait for the Continue response */
io->write_state = SOUP_MESSAGE_IO_STATE_BLOCKING;
io->read_state = SOUP_MESSAGE_IO_STATE_HEADERS;
} else {
io->write_state = SOUP_MESSAGE_IO_STATE_BODY_START;
/* If the client was waiting for a Continue
* but we sent something else, then they're
* now done writing.
*/
if (io->mode == SOUP_MESSAGE_IO_SERVER &&
io->read_state == SOUP_MESSAGE_IO_STATE_BLOCKING)
io->read_state = SOUP_MESSAGE_IO_STATE_DONE;
}
soup_message_wrote_headers (msg);
break;
case SOUP_MESSAGE_IO_STATE_BODY_START:
io->body_ostream = soup_body_output_stream_new (io->ostream,
io->write_encoding,
io->write_length);
io->write_state = SOUP_MESSAGE_IO_STATE_BODY;
break;
case SOUP_MESSAGE_IO_STATE_BODY:
if (!io->write_length &&
io->write_encoding != SOUP_ENCODING_EOF &&
io->write_encoding != SOUP_ENCODING_CHUNKED) {
io->write_state = SOUP_MESSAGE_IO_STATE_BODY_FLUSH;
break;
}
if (!io->write_chunk) {
io->write_chunk = soup_message_body_get_chunk (io->write_body, io->write_body_offset);
if (!io->write_chunk) {
g_return_val_if_fail (!io->item || !io->item->new_api, FALSE);
soup_message_io_pause (msg);
return FALSE;
}
if (!io->write_chunk->length) {
io->write_state = SOUP_MESSAGE_IO_STATE_BODY_FLUSH;
break;
}
}
nwrote = g_pollable_stream_write (io->body_ostream,
io->write_chunk->data + io->written,
io->write_chunk->length - io->written,
blocking,
cancellable, error);
if (nwrote == -1)
return FALSE;
chunk = soup_buffer_new_subbuffer (io->write_chunk,
io->written, nwrote);
io->written += nwrote;
if (io->write_length)
io->write_length -= nwrote;
if (io->written == io->write_chunk->length)
io->write_state = SOUP_MESSAGE_IO_STATE_BODY_DATA;
soup_message_wrote_body_data (msg, chunk);
soup_buffer_free (chunk);
break;
case SOUP_MESSAGE_IO_STATE_BODY_DATA:
io->written = 0;
if (io->write_chunk->length == 0) {
io->write_state = SOUP_MESSAGE_IO_STATE_BODY_FLUSH;
break;
}
if (io->mode == SOUP_MESSAGE_IO_SERVER ||
priv->msg_flags & SOUP_MESSAGE_CAN_REBUILD)
soup_message_body_wrote_chunk (io->write_body, io->write_chunk);
io->write_body_offset += io->write_chunk->length;
soup_buffer_free (io->write_chunk);
io->write_chunk = NULL;
io->write_state = SOUP_MESSAGE_IO_STATE_BODY;
soup_message_wrote_chunk (msg);
break;
case SOUP_MESSAGE_IO_STATE_BODY_FLUSH:
if (io->body_ostream) {
if (blocking || io->write_encoding != SOUP_ENCODING_CHUNKED) {
if (!g_output_stream_close (io->body_ostream, cancellable, error))
return FALSE;
g_clear_object (&io->body_ostream);
} else {
io->async_close_wait = g_cancellable_new ();
if (io->async_context)
g_main_context_push_thread_default (io->async_context);
g_output_stream_close_async (io->body_ostream,
G_PRIORITY_DEFAULT, cancellable,
closed_async, g_object_ref (msg));
if (io->async_context)
g_main_context_pop_thread_default (io->async_context);
}
}
io->write_state = SOUP_MESSAGE_IO_STATE_BODY_DONE;
break;
case SOUP_MESSAGE_IO_STATE_BODY_DONE:
io->write_state = SOUP_MESSAGE_IO_STATE_FINISHING;
soup_message_wrote_body (msg);
break;
case SOUP_MESSAGE_IO_STATE_FINISHING:
io->write_state = SOUP_MESSAGE_IO_STATE_DONE;
if (io->mode == SOUP_MESSAGE_IO_CLIENT)
io->read_state = SOUP_MESSAGE_IO_STATE_HEADERS;
break;
default:
g_return_val_if_reached (FALSE);
}
return TRUE;
}
static void
io_write (SoupSocket *sock, SoupMessage *msg)
{
SoupMessagePrivate *priv = SOUP_MESSAGE_GET_PRIVATE (msg);
SoupMessageIOData *io = priv->io_data;
write_more:
switch (io->write_state) {
case SOUP_MESSAGE_IO_STATE_NOT_STARTED:
return;
case SOUP_MESSAGE_IO_STATE_HEADERS:
if (!io->write_buf->len) {
io->get_headers_cb (msg, io->write_buf,
&io->write_encoding,
io->user_data);
if (!io->write_buf->len) {
soup_message_io_pause (msg);
return;
}
}
if (!write_data (msg, io->write_buf->str,
io->write_buf->len, FALSE))
return;
g_string_truncate (io->write_buf, 0);
if (io->write_encoding == SOUP_ENCODING_CONTENT_LENGTH) {
SoupMessageHeaders *hdrs =
(io->mode == SOUP_MESSAGE_IO_CLIENT) ?
msg->request_headers : msg->response_headers;
io->write_length = soup_message_headers_get_content_length (hdrs);
}
if (io->mode == SOUP_MESSAGE_IO_SERVER &&
SOUP_STATUS_IS_INFORMATIONAL (msg->status_code)) {
if (msg->status_code == SOUP_STATUS_CONTINUE) {
/* Stop and wait for the body now */
io->write_state =
SOUP_MESSAGE_IO_STATE_BLOCKING;
io->read_state = io_body_state (io->read_encoding);
} else {
/* We just wrote a 1xx response
* header, so stay in STATE_HEADERS.
* (The caller will pause us from the
* wrote_informational callback if he
* is not ready to send the final
* response.)
*/
}
} else if (io->mode == SOUP_MESSAGE_IO_CLIENT &&
soup_message_headers_get_expectations (msg->request_headers) & SOUP_EXPECTATION_CONTINUE) {
/* Need to wait for the Continue response */
io->write_state = SOUP_MESSAGE_IO_STATE_BLOCKING;
io->read_state = SOUP_MESSAGE_IO_STATE_HEADERS;
} else {
io->write_state = io_body_state (io->write_encoding);
/* If the client was waiting for a Continue
* but we sent something else, then they're
* now done writing.
*/
if (io->mode == SOUP_MESSAGE_IO_SERVER &&
io->read_state == SOUP_MESSAGE_IO_STATE_BLOCKING)
io->read_state = SOUP_MESSAGE_IO_STATE_FINISHING;
}
SOUP_MESSAGE_IO_PREPARE_FOR_CALLBACK;
if (SOUP_STATUS_IS_INFORMATIONAL (msg->status_code)) {
soup_message_wrote_informational (msg);
soup_message_cleanup_response (msg);
} else
soup_message_wrote_headers (msg);
SOUP_MESSAGE_IO_RETURN_IF_CANCELLED_OR_PAUSED;
break;
case SOUP_MESSAGE_IO_STATE_BLOCKING:
io_read (sock, msg);
/* If io_read reached a point where we could write
* again, it would have recursively called io_write.
* So (a) we don't need to try to keep writing, and
* (b) we can't anyway, because msg may have been
* destroyed.
*/
return;
case SOUP_MESSAGE_IO_STATE_BODY:
if (!io->write_length && io->write_encoding != SOUP_ENCODING_EOF) {
wrote_body:
io->write_state = SOUP_MESSAGE_IO_STATE_FINISHING;
SOUP_MESSAGE_IO_PREPARE_FOR_CALLBACK;
soup_message_wrote_body (msg);
SOUP_MESSAGE_IO_RETURN_IF_CANCELLED_OR_PAUSED;
break;
}
if (!io->write_chunk) {
io->write_chunk = soup_message_body_get_chunk (io->write_body, io->write_body_offset);
if (!io->write_chunk) {
soup_message_io_pause (msg);
return;
}
if (io->write_chunk->length > io->write_length &&
io->write_encoding != SOUP_ENCODING_EOF) {
/* App is trying to write more than it
* claimed it would; we have to truncate.
*/
SoupBuffer *truncated =
soup_buffer_new_subbuffer (io->write_chunk,
0, io->write_length);
soup_buffer_free (io->write_chunk);
io->write_chunk = truncated;
} else if (io->write_encoding == SOUP_ENCODING_EOF &&
!io->write_chunk->length)
goto wrote_body;
}
if (!write_data (msg, io->write_chunk->data,
io->write_chunk->length, TRUE))
return;
if (io->mode == SOUP_MESSAGE_IO_SERVER)
soup_message_body_wrote_chunk (io->write_body, io->write_chunk);
io->write_body_offset += io->write_chunk->length;
soup_buffer_free (io->write_chunk);
io->write_chunk = NULL;
SOUP_MESSAGE_IO_PREPARE_FOR_CALLBACK;
soup_message_wrote_chunk (msg);
SOUP_MESSAGE_IO_RETURN_IF_CANCELLED_OR_PAUSED;
break;
case SOUP_MESSAGE_IO_STATE_CHUNK_SIZE:
if (!io->write_chunk) {
io->write_chunk = soup_message_body_get_chunk (io->write_body, io->write_body_offset);
if (!io->write_chunk) {
soup_message_io_pause (msg);
return;
}
g_string_append_printf (io->write_buf, "%lx\r\n",
(unsigned long) io->write_chunk->length);
io->write_body_offset += io->write_chunk->length;
}
if (!write_data (msg, io->write_buf->str,
io->write_buf->len, FALSE))
return;
g_string_truncate (io->write_buf, 0);
if (io->write_chunk->length == 0) {
/* The last chunk has no CHUNK_END... */
io->write_state = SOUP_MESSAGE_IO_STATE_TRAILERS;
break;
}
io->write_state = SOUP_MESSAGE_IO_STATE_CHUNK;
/* fall through */
case SOUP_MESSAGE_IO_STATE_CHUNK:
if (!write_data (msg, io->write_chunk->data,
io->write_chunk->length, TRUE))
return;
if (io->mode == SOUP_MESSAGE_IO_SERVER)
soup_message_body_wrote_chunk (io->write_body, io->write_chunk);
soup_buffer_free (io->write_chunk);
io->write_chunk = NULL;
io->write_state = SOUP_MESSAGE_IO_STATE_CHUNK_END;
SOUP_MESSAGE_IO_PREPARE_FOR_CALLBACK;
soup_message_wrote_chunk (msg);
SOUP_MESSAGE_IO_RETURN_IF_CANCELLED_OR_PAUSED;
/* fall through */
case SOUP_MESSAGE_IO_STATE_CHUNK_END:
if (!write_data (msg, SOUP_MESSAGE_IO_EOL,
SOUP_MESSAGE_IO_EOL_LEN, FALSE))
return;
io->write_state = SOUP_MESSAGE_IO_STATE_CHUNK_SIZE;
break;
case SOUP_MESSAGE_IO_STATE_TRAILERS:
if (!write_data (msg, SOUP_MESSAGE_IO_EOL,
SOUP_MESSAGE_IO_EOL_LEN, FALSE))
return;
io->write_state = SOUP_MESSAGE_IO_STATE_FINISHING;
SOUP_MESSAGE_IO_PREPARE_FOR_CALLBACK;
soup_message_wrote_body (msg);
SOUP_MESSAGE_IO_RETURN_IF_CANCELLED_OR_PAUSED;
/* fall through */
case SOUP_MESSAGE_IO_STATE_FINISHING:
if (io->write_tag) {
g_signal_handler_disconnect (io->sock, io->write_tag);
io->write_tag = 0;
}
io->write_state = SOUP_MESSAGE_IO_STATE_DONE;
if (io->mode == SOUP_MESSAGE_IO_CLIENT) {
io->read_state = SOUP_MESSAGE_IO_STATE_HEADERS;
io_read (sock, msg);
} else
soup_message_io_finished (msg);
return;
case SOUP_MESSAGE_IO_STATE_DONE:
default:
g_return_if_reached ();
}
goto write_more;
}
