From 606428ce504ecd3a35d3f4da9a644c5a481210d1 Mon Sep 17 00:00:00 2001
From: Brian Pane <brianp@apache.org>
Date: Fri, 10 May 2002 06:47:13 +0000
Subject: [PATCH] Performance fix: replaced the strcasecmp calls in
 ap_make_content_type() with apr_strmatch()

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@95026 13f79535-47bb-0310-9956-ffa450edef68
---
 server/core.c     |  3 +++
 server/protocol.c | 40 ++++++++++++++++++++++++++++++++--------
 2 files changed, 35 insertions(+), 8 deletions(-)

diff --git a/server/core.c b/server/core.c
index 9d149c9f44..e42fe8cd24 100644
--- a/server/core.c
+++ b/server/core.c
@@ -3851,9 +3851,12 @@ static apr_status_t core_output_filter(ap_filter_t *f, apr_bucket_brigade *b)
     return APR_SUCCESS;
 }
 
+AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool);
+
 static int core_post_config(apr_pool_t *pconf, apr_pool_t *plog, apr_pool_t *ptemp, server_rec *s)
 {
     ap_set_version(pconf);
+    ap_setup_make_content_type(pconf);
     return OK;
 }
 
diff --git a/server/protocol.c b/server/protocol.c
index 8ba3e65dfc..73f396afc4 100644
--- a/server/protocol.c
+++ b/server/protocol.c
@@ -68,6 +68,7 @@
 #include "apr_buckets.h"
 #include "apr_lib.h"
 #include "apr_signal.h"
+#include "apr_strmatch.h"
 
 #define APR_WANT_STDIO          /* for sscanf */
 #define APR_WANT_STRFUNC
@@ -107,6 +108,30 @@ APR_HOOK_STRUCT(
 
 AP_DECLARE_DATA ap_filter_rec_t *ap_old_write_func = NULL;
 
+
+/* Patterns to match in ap_make_content_type() */
+static const char *needcset[] = {
+    "text/plain",
+    "text/html",
+    NULL
+};
+static const apr_strmatch_pattern **needcset_patterns;
+static const apr_strmatch_pattern *charset_pattern;
+
+AP_DECLARE(void) ap_setup_make_content_type(apr_pool_t *pool)
+{
+    int i;
+    for (i = 0; needcset[i]; i++) {
+        continue;
+    }
+    needcset_patterns = (const apr_strmatch_pattern **)
+        apr_palloc(pool, (i + 1) * sizeof(apr_strmatch_pattern *));
+    for (i = 0; needcset[i]; i++) {
+        needcset_patterns[i] = apr_strmatch_precompile(pool, needcset[i], 0);
+    }
+    charset_pattern = apr_strmatch_precompile(pool, "charset=", 0);
+}
+
 /*
  * Builds the content-type that should be sent to the client from the
  * content-type specified.  The following rules are followed:
@@ -117,14 +142,11 @@ AP_DECLARE_DATA ap_filter_rec_t *ap_old_write_func = NULL;
  */
 AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type)
 {
-    static const char *needcset[] = {
-        "text/plain",
-        "text/html",
-        NULL };
-    const char **pcset;
+    const apr_strmatch_pattern **pcset;
     core_dir_config *conf =
         (core_dir_config *)ap_get_module_config(r->per_dir_config,
                                                 &core_module);
+    apr_size_t type_len;
 
     if (!type) {
         type = ap_default_type(r);
@@ -134,7 +156,9 @@ AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type)
         return type;
     }
 
-    if (ap_strcasestr(type, "charset=") != NULL) {
+    type_len = strlen(type);
+
+    if (apr_strmatch(charset_pattern, type, type_len) != NULL) {
         /* already has parameter, do nothing */
         /* XXX we don't check the validity */
         ;
@@ -143,8 +167,8 @@ AP_DECLARE(const char *)ap_make_content_type(request_rec *r, const char *type)
         /* see if it makes sense to add the charset. At present,
          * we only add it if the Content-type is one of needcset[]
          */
-        for (pcset = needcset; *pcset ; pcset++) {
-            if (ap_strcasestr(type, *pcset) != NULL) {
+        for (pcset = needcset_patterns; *pcset ; pcset++) {
+            if (apr_strmatch(*pcset, type, type_len) != NULL) {
                 type = apr_pstrcat(r->pool, type, "; charset=",
                                    conf->add_default_charset_name, NULL);
                 break;
-- 
2.40.0