Correctly parse Range headers with multiple ranges

Correctly parse Range headers with multiple ranges that have
whitespaces around the comma separating the ranges from each other by
trimming the whitespace.

PR: 69831


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1928901 13f79535-47bb-0310-9956-ffa450edef68

Author: rpluem

changes-entries/pr69831.txt

@@ -0,0 +1,3 @@
+  *) http: Correctly parse Range headers with multiple ranges that have
+     whitespaces around the comma separating the ranges from each other.
+     PR 69831 [Ruediger Pluem]

modules/http/byterange_filter.c

@@ -136,9 +136,17 @@ static int ap_set_byterange(request_rec *r, apr_off_t clength,
     }
     *indexes = apr_array_make(r->pool, ranges, sizeof(indexes_t));
     while ((cur = ap_getword(r->pool, &range, ','))) {
-        char *dash;
+        char *dash, *end_cur;
         apr_off_t number, start, end;
 
+         /* Remove leading and trailing white spaces */
+        while (apr_isspace(*cur))
+            ++cur;
+        /* blast trailing whitespace */
+        end_cur = &cur[strlen(cur)];
+        while (--end_cur >= cur && apr_isspace(*end_cur))
+            *end_cur = '\0';
+
         if (!*cur)
             break;