Github user PSUdaemon commented on a diff in the pull request:
https://github.com/apache/trafficserver/pull/834#discussion_r78214072
--- Diff: proxy/ParentConsistentHash.cc ---
@@ -64,23 +67,127 @@ ParentConsistentHash::getPathHash(HttpRequestData
*hrdata, ATSHash64 *h)
const char *tmp = NULL;
int len;
URL *url = hrdata->hdr->url_get();
+ char buffer[1024];
+ int slen = 0;
+ int num_dirs = 0;
+
+ // Use over-ride URL from HttpTransact::State's
cache_info.parent_selection_url, if present.
+ URL *ps_url = NULL;
+ Debug("parent_select", "ParentConsistentHash::%s()
hrdata->cache_info_parent_selection_url = 0x%lx", __func__,
+ (unsigned long int)hrdata->cache_info_parent_selection_url);
+ if (hrdata->cache_info_parent_selection_url) {
+ ps_url = *(hrdata->cache_info_parent_selection_url);
+ Debug("parent_select", "ParentConsistentHash::%s() ps_url = 0x%lx",
__func__, (unsigned long int)ps_url);
+ if (ps_url) {
+ tmp = ps_url->string_get_ref(&len);
+ if (tmp && len > 0) {
+ // Print the over-ride URL
+ if (is_debug_tag_set("parent_select")) {
+ slen = (len > 1023) ? 1023 : len;
+ strncpy(buffer, tmp, slen);
+ buffer[slen] = 0;
+ Debug("parent_select", "ParentConsistentHash::%s() Using
Over-Ride String='%s'.", __func__, buffer);
+ }
+ h->update(tmp, len);
+ goto done;
+ }
+ }
+ }
// Always hash on '/' because paths returned by ATS are always stripped
of it
h->update("/", 1);
tmp = url->path_get(&len);
- if (tmp) {
+
+ if (tmp && len > 0) {
+ // Print Original Path
+ if (is_debug_tag_set("parent_select")) {
+ slen = (len > 1023) ? 1023 : len;
+ strncpy(buffer, tmp, slen);
+ buffer[slen] = 0;
+ Debug("parent_select", "ParentConsistentHash::%s() Original
Path='%s'.", __func__, buffer);
+ }
+
+ // Process max_dirs directive.
+ if (max_dirs != 0) {
+ // Determine number of directory components in the path.
+ // NOTE: Leading '/' is gone already.
+ for (int x = 0; x < len; x++) {
+ if (tmp[x] == '/')
+ num_dirs++;
+ }
+ // If max_dirs positive , include directory components from the left
up to max_dirs.
+ // If max_dirs negative , include directory components from the left
up to num_dirs - ( abs(max_dirs) - 1 ).
+ int limit = 0;
+ if (max_dirs > 0)
+ limit = max_dirs;
+ else if (max_dirs < 0) {
+ int md = abs(max_dirs) - 1;
+ if (md < num_dirs)
+ limit = num_dirs - md;
+ else
+ limit = 0;
+ }
+ if (limit > 0) {
+ int x = 0;
+ int count = 0;
+ for (; x < len; x++) {
+ if (tmp[x] == '/')
+ count++;
+ if (count == limit) {
+ len = x + 1;
+ break;
+ }
+ }
+ } else {
+ len = 0;
+ }
+ }
+
+ // Print Post max_dirs Path
+ if (is_debug_tag_set("parent_select")) {
+ slen = (len > 1023) ? 1023 : len;
+ strncpy(buffer, tmp, slen);
+ buffer[slen] = 0;
+ Debug("parent_select", "ParentConsistentHash::%s() Post-MD
Path='%s'.", __func__, buffer);
+ }
+
+ if (ignore_fname || max_dirs != 0) {
+ int x = len - 1;
+ for (; x >= 0; x--) {
--- End diff --
Is there a reason to initialize this outside the loop?
---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastruct...@apache.org or file a JIRA ticket
with INFRA.
---
