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. Added range fields to struct connection.

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. Added sanity check in split_string(): left <= right
. Implemented parse_range_field()
This commit is contained in:
Emil Mikulic 2003-06-27 05:31:55 +00:00
parent 6ee7a85231
commit 7090baae35
1 changed files with 68 additions and 1 deletions
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69
trunk/darkhttpd.c
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@ -74,6 +74,8 @@ struct connection
/* request fields */
char *method, *uri, *referer, *user_agent;
size_t range_begin, range_end;
int range_begin_given, range_end_given;
char *header;
size_t header_length, header_sent;
@ -231,7 +233,10 @@ static void nonblock_socket(const int sock)
static char *split_string(const char *src,
const size_t left, const size_t right)
{
char *dest = (char*) xmalloc(right - left + 1);
char *dest;
assert(left <= right);
dest = (char*) xmalloc(right - left + 1);
memcpy(dest, src+left, right-left);
dest[right-left] = '\0';
return dest;
@ -887,6 +892,68 @@ static char *parse_field(const struct connection *conn, const char *field)
/* ---------------------------------------------------------------------------
* Parse a Range: field into range_begin and range_end. Only handles the
* first range if a list is given. Sets range_{begin,end}_given to 1 if
* either part of the range is given.
*/
static void parse_range_field(struct connection *conn)
{
int bound1, bound2, len;
char *range;
do /* break handling */
{
range = parse_field(conn, "Range: bytes=");
if (range == NULL) return;
len = strlen(range);
/* parse number up to hyphen */
bound1 = 0;
for (bound2=0;
isdigit( (int)range[bound2] ) && bound2 < len;
bound2++)
;
if (bound2 == len || range[bound2] != '-')
break; /* there must be a hyphen here */
if (bound1 != bound2)
{
conn->range_begin_given = 1;
conn->range_begin = atoi(range+bound1);
}
/* parse number after hyphen */
bound2++;
for (bound1=bound2;
isdigit( (int)range[bound2] ) && bound2 < len;
bound2++)
; /* FIXME */
if (bound2 != len && range[bound2] != ',')
break; /* must be end of string or a list to be valid */
if (bound1 != bound2)
{
conn->range_end_given = 1;
conn->range_end = atoi(range+bound1);
}
}
while(0); /* break handling */
free(range);
/* sanity check: begin <= end */
if (conn->range_begin_given && conn->range_end_given &&
(conn->range_begin > conn->range_end))
{
conn->range_begin_given = conn->range_end_given = 0;
}
}
/* ---------------------------------------------------------------------------
* Parse an HTTP request like "GET / HTTP/1.1" to get the method (GET), the
* url (/), the referer (if given) and the user-agent (if given). Remember to