** +-------------------------------------------------------+
*/
+/*
+ * substitute the prefix path 'match' in 'input' with 'subst'
+ * (think of RewriteBase which substitutes the physical path with
+ * the virtual path)
+ */
+
static char *subst_prefix_path(request_rec *r, char *input, char *match,
const char *subst)
{
- char matchbuf[LONG_STRING_LEN];
- char substbuf[LONG_STRING_LEN];
- char *output;
- int l;
-
- output = input;
+ apr_size_t len = strlen(match);
- /* first create a match string which always has a trailing slash */
- l = apr_cpystrn(matchbuf, match, sizeof(matchbuf) - 1) - matchbuf;
- if (!l || matchbuf[l-1] != '/') {
- matchbuf[l] = '/';
- matchbuf[l+1] = '\0';
- l++;
+ if (len && match[len - 1] == '/') {
+ --len;
}
- /* now compare the prefix */
- if (strncmp(input, matchbuf, l) == 0) {
- rewritelog(r, 5, "strip matching prefix: %s -> %s", output, output+l);
- output = apr_pstrdup(r->pool, output+l);
- /* and now add the base-URL as replacement prefix */
- l = apr_cpystrn(substbuf, subst, sizeof(substbuf) - 1) - substbuf;
- if (!l || substbuf[l-1] != '/') {
- substbuf[l] = '/';
- substbuf[l+1] = '\0';
- l++;
- }
- if (output[0] == '/') {
- rewritelog(r, 4, "add subst prefix: %s -> %s%s",
- output, substbuf, output+1);
- output = apr_pstrcat(r->pool, substbuf, output+1, NULL);
+ if (!strncmp(input, match, len) && input[len++] == '/') {
+ apr_size_t slen, outlen;
+ char *output;
+
+ rewritelog(r, 5, "strip matching prefix: %s -> %s", input, input+len);
+
+ slen = strlen(subst);
+ if (slen && subst[slen - 1] != '/') {
+ ++slen;
}
- else {
- rewritelog(r, 4, "add subst prefix: %s -> %s%s",
- output, substbuf, output);
- output = apr_pstrcat(r->pool, substbuf, output, NULL);
+
+ outlen = strlen(input) + slen - len;
+ output = apr_palloc(r->pool, outlen + 1); /* don't forget the \0 */
+
+ memcpy(output, subst, slen);
+ if (slen && !output[slen-1]) {
+ output[slen-1] = '/';
}
+ memcpy(output+slen, input+len, outlen - slen);
+ output[outlen] = '\0';
+
+ rewritelog(r, 4, "add subst prefix: %s -> %s", input+len, output);
+
+ return output;
}
- return output;
+
+ /* prefix didn't match */
+ return input;
}