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-rw-r--r--src/client_read.c113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/client_read.c b/src/client_read.c
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+++ b/src/client_read.c
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+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * http://www.musicpd.org
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "client_internal.h"
+#include "fifo_buffer.h"
+
+#include <assert.h>
+#include <string.h>
+
+static char *
+client_read_line(struct client *client)
+{
+ const char *p, *newline;
+ size_t length;
+ char *line;
+
+ p = fifo_buffer_read(client->input, &length);
+ if (p == NULL)
+ return NULL;
+
+ newline = memchr(p, '\n', length);
+ if (newline == NULL)
+ return NULL;
+
+ line = g_strndup(p, newline - p);
+ fifo_buffer_consume(client->input, newline - p + 1);
+
+ return g_strchomp(line);
+}
+
+static enum command_return
+client_input_received(struct client *client, size_t bytesRead)
+{
+ char *line;
+
+ fifo_buffer_append(client->input, bytesRead);
+
+ /* process all lines */
+
+ while ((line = client_read_line(client)) != NULL) {
+ enum command_return ret = client_process_line(client, line);
+ g_free(line);
+
+ if (ret == COMMAND_RETURN_KILL ||
+ ret == COMMAND_RETURN_CLOSE)
+ return ret;
+ if (client_is_expired(client))
+ return COMMAND_RETURN_CLOSE;
+ }
+
+ return COMMAND_RETURN_OK;
+}
+
+enum command_return
+client_read(struct client *client)
+{
+ char *p;
+ size_t max_length;
+ GError *error = NULL;
+ GIOStatus status;
+ gsize bytes_read;
+
+ assert(client != NULL);
+ assert(client->channel != NULL);
+
+ p = fifo_buffer_write(client->input, &max_length);
+ if (p == NULL) {
+ g_warning("[%u] buffer overflow", client->num);
+ return COMMAND_RETURN_CLOSE;
+ }
+
+ status = g_io_channel_read_chars(client->channel, p, max_length,
+ &bytes_read, &error);
+ switch (status) {
+ case G_IO_STATUS_NORMAL:
+ return client_input_received(client, bytes_read);
+
+ case G_IO_STATUS_AGAIN:
+ /* try again later, after select() */
+ return COMMAND_RETURN_OK;
+
+ case G_IO_STATUS_EOF:
+ /* peer disconnected */
+ return COMMAND_RETURN_CLOSE;
+
+ case G_IO_STATUS_ERROR:
+ /* I/O error */
+ g_warning("failed to read from client %d: %s",
+ client->num, error->message);
+ g_error_free(error);
+ return COMMAND_RETURN_CLOSE;
+ }
+
+ /* unreachable */
+ return COMMAND_RETURN_CLOSE;
+}