[MINOR] acl: ignore empty lines and comments in pattern files
Most often, pattern files used by ACLs will be produced by tools
which emit some comments (eg: geolocation lists). It's very annoying
to have to clean the files before using them, and it does not make
much sense to be able to support patterns we already can't input in
the config file. So this patch makes the pattern file loader skip
lines beginning with a sharp and the empty ones, and strips leading
spaces and tabs.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index 1ca54fe..93914a5 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -5893,8 +5893,15 @@
The "-f" flag is special as it loads all of the lines it finds in the file
specified in argument and loads all of them before continuing. It is even
possible to pass multiple "-f" arguments if the patterns are to be loaded from
-multiple files. Also, note that the "-i" flag applies to subsequent entries and
-not to entries loaded from files preceeding it. For instance :
+multiple files. Empty lines as well as lines beginning with a sharp ('#') will
+be ignored. All leading spaces and tabs will be stripped. If it is absolutely
+needed to insert a valid pattern beginning with a sharp, just prefix it with a
+space so that it is not taken for a comment. Depending on the data type and
+match method, haproxy may load the lines into a binary tree, allowing very fast
+lookups. This is true for IPv4 and exact string matching. In this case,
+duplicates will automatically be removed. Also, note that the "-i" flag applies
+to subsequent entries and not to entries loaded from files preceeding it. For
+instance :
acl valid-ua hdr(user-agent) -f exact-ua.lst -i -f generic-ua.lst test
diff --git a/src/acl.c b/src/acl.c
index f548c17..adf4494 100644
--- a/src/acl.c
+++ b/src/acl.c
@@ -770,11 +770,24 @@
*/
opaque = 0;
pattern = NULL;
- args[0] = trash;
args[1] = "";
while (fgets(trash, sizeof(trash), file) != NULL) {
c = trash;
+
+ /* ignore lines beginning with a dash */
+ if (*c == '#')
+ continue;
+
+ /* strip leading spaces and tabs */
+ while (*c == ' ' || *c == '\t')
+ c++;
+
+ /* empty lines are ignored too */
+ if (!*c)
+ continue;
+
+ args[0] = c;
while (*c && *c != '\n' && *c != '\r')
c++;
*c = 0;