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rtsp: Improve parse_line().

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Make parse_line() handle keys with multiple values on one line correctly.
This commit is contained in:
Peter Kjellerstedt 2009-06-17 21:46:27 +02:00
parent db66ff4a62
commit efc8901a39
1 changed files with 58 additions and 57 deletions
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115
gst-libs/gst/rtsp/gstrtspconnection.c
View file

@ -114,12 +114,6 @@ typedef struct
guint coutl;
} DecodeCtx;
static GstRTSPResult read_line (GstRTSPConnection * conn, guint8 * buffer,
guint * idx, guint size);
static GstRTSPResult parse_key_value (guint8 * buffer, gchar * key,
guint keysize, gchar ** value);
static GstRTSPResult parse_string (gchar * dest, gint size, gchar ** src);
#ifdef G_OS_WIN32
#define READ_SOCKET(fd, buf, len) recv (fd, (char *)buf, len, 0)
#define WRITE_SOCKET(fd, buf, len) send (fd, (const char *)buf, len, 0)
@ -1441,21 +1435,6 @@ parse_string (gchar * dest, gint size, gchar ** src)
return res;
}
static void
parse_key (gchar * dest, gint size, gchar ** src)
{
gint idx;
idx = 0;
while (**src != ':' && **src != '\0') {
if (idx < size - 1)
dest[idx++] = **src;
(*src)++;
}
if (size > 0)
dest[idx] = '\0';
}
static GstRTSPResult
parse_protocol_version (gchar * protocol, GstRTSPMsgType * type,
GstRTSPVersion * version)
@ -1593,56 +1572,78 @@ parse_request_line (guint8 * buffer, GstRTSPMessage * msg)
return res;
}
static GstRTSPResult
parse_key_value (guint8 * buffer, gchar * key, guint keysize, gchar ** value)
{
gchar *bptr;
bptr = (gchar *) buffer;
/* read key */
parse_key (key, keysize, &bptr);
if (G_UNLIKELY (*bptr != ':'))
goto no_column;
bptr++;
while (g_ascii_isspace (*bptr))
bptr++;
*value = bptr;
return GST_RTSP_OK;
/* ERRORS */
no_column:
{
return GST_RTSP_EPARSE;
}
}
/* parsing lines means reading a Key: Value pair */
static GstRTSPResult
parse_line (guint8 * buffer, GstRTSPMessage * msg)
{
GstRTSPResult res;
gchar key[32];
gchar *value;
GstRTSPHeaderField field;
gchar *line = (gchar *) buffer;
gchar *value;
res = parse_key_value (buffer, key, sizeof (key), &value);
if (G_UNLIKELY (res != GST_RTSP_OK))
if ((value = strchr (line, ':')) == NULL || value == line)
goto parse_error;
field = gst_rtsp_find_header_field (key);
if (field != GST_RTSP_HDR_INVALID)
gst_rtsp_message_add_header (msg, field, value);
/* trim space before the colon */
if (value[-1] == ' ')
value[-1] = '\0';
/* replace the colon with a NUL */
*value++ = '\0';
/* find the header */
field = gst_rtsp_find_header_field (line);
if (field == GST_RTSP_HDR_INVALID)
goto done;
/* split up the value in multiple key:value pairs if it contains comma(s) */
while (*value != '\0') {
gchar *next_value;
gboolean quoted = FALSE;
guint comment = 0;
/* trim leading space */
if (*value == ' ')
value++;
/* find the next value, taking special care of quotes and comments */
next_value = value;
while (*next_value != '\0') {
if ((quoted || comment != 0) && *next_value == '\\' &&
next_value[1] != '\0')
next_value++;
else if (comment == 0 && *next_value == '"')
quoted = !quoted;
else if (!quoted && *next_value == '(')
comment++;
else if (comment != 0 && *next_value == ')')
comment--;
else if (!quoted && comment == 0 && *next_value == ',')
break;
next_value++;
}
/* trim space */
if (value != next_value && next_value[-1] == ' ')
next_value[-1] = '\0';
if (*next_value != '\0')
*next_value++ = '\0';
/* add the key:value pair */
if (*value != '\0')
gst_rtsp_message_add_header (msg, field, value);
value = next_value;
}
done:
return GST_RTSP_OK;
/* ERRORS */
parse_error:
{
return res;
return GST_RTSP_EPARSE;
}
}