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diff src/core/ngx_string.c @ 340:10cc350ed8a1 NGINX_0_6_14

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nginx 0.6.14 *) Change: now by default the "echo" SSI command uses entity encoding. *) Feature: the "encoding" parameter in the "echo" SSI command. *) Feature: the "access_log" directive may be used inside the "limit_except" block. *) Bugfix: if all upstream servers were failed, then all servers had got weight the was equal one until servers became alive; bug appeared in 0.6.6. *) Bugfix: a segmentation fault occurred in worker process if $date_local and $date_gmt were used outside the ngx_http_ssi_filter_module. *) Bugfix: a segmentation fault might occur in worker process if debug log was enabled. Thanks to Andrei Nigmatulin. *) Bugfix: ngx_http_memcached_module did not set $upstream_response_time. Thanks to Maxim Dounin. *) Bugfix: a worker process may got caught in an endless loop, if the memcached was used. *) Bugfix: nginx supported low case only "close" and "keep-alive" values in the "Connection" request header line; bug appeared in 0.6.11. *) Bugfix: sub_filter did not work with empty substitution. *) Bugfix: in sub_filter parsing.
author Igor Sysoev <http://sysoev.ru>
date Mon, 15 Oct 2007 00:00:00 +0400
parents 390b8f8309d6
children 4276c2f1f434
line wrap: on
line diff
--- a/src/core/ngx_string.c
+++ b/src/core/ngx_string.c
@@ -442,7 +442,7 @@ ngx_vsnprintf(u_char *buf, size_t max, c
 
 
 /*
- * We use ngx_strcasecmp()/ngx_strncasecmp() for 7-bit ASCII string only,
+ * We use ngx_strcasecmp()/ngx_strncasecmp() for 7-bit ASCII strings only,
  * and implement our own ngx_strcasecmp()/ngx_strncasecmp()
  * to avoid libc locale overhead.  Besides, we use the ngx_uint_t's
  * instead of the u_char's, because they are slightly faster.
@@ -503,6 +503,95 @@ ngx_strncasecmp(u_char *s1, u_char *s2, 
 }
 
 
+u_char *
+ngx_strnstr(u_char *s1, char *s2, size_t len)
+{
+    u_char  c1, c2;
+    size_t  n;
+
+    c2 = *(u_char *) s2++;
+
+    n = ngx_strlen(s2);
+
+    do {
+        do {
+            if (len-- == 0) {
+                return NULL;
+            }
+
+            c1 = *s1++;
+
+            if (c1 == 0) {
+                return NULL;
+            }
+
+        } while (c1 != c2);
+
+        if (n > len) {
+            return NULL;
+        }
+
+    } while (ngx_strncmp(s1, (u_char *) s2, n) != 0);
+
+    return --s1;
+}
+
+
+/*
+ * ngx_strstrn() and ngx_strcasestrn() are intended to search for static
+ * substring with known length in null-terminated string. The argument n
+ * must be length of the second substring - 1.
+ */
+
+u_char *
+ngx_strstrn(u_char *s1, char *s2, size_t n)
+{
+    u_char  c1, c2;
+
+    c2 = *(u_char *) s2++;
+
+    do {
+        do {
+            c1 = *s1++;
+
+            if (c1 == 0) {
+                return NULL;
+            }
+
+        } while (c1 != c2);
+
+    } while (ngx_strncmp(s1, (u_char *) s2, n) != 0);
+
+    return --s1;
+}
+
+
+u_char *
+ngx_strcasestrn(u_char *s1, char *s2, size_t n)
+{
+    ngx_uint_t  c1, c2;
+
+    c2 = (ngx_uint_t) *s2++;
+    c2  = (c2 >= 'A' && c2 <= 'Z') ? (c2 | 0x20) : c2;
+
+    do {
+        do {
+            c1 = (ngx_uint_t) *s1++;
+
+            if (c1 == 0) {
+                return NULL;
+            }
+
+            c1  = (c1 >= 'A' && c1 <= 'Z') ? (c1 | 0x20) : c1;
+
+        } while (c1 != c2);
+
+    } while (ngx_strncasecmp(s1, (u_char *) s2, n) != 0);
+
+    return --s1;
+}
+
+
 ngx_int_t
 ngx_rstrncmp(u_char *s1, u_char *s2, size_t n)
 {
@@ -1250,6 +1339,67 @@ done:
 }
 
 
+uintptr_t
+ngx_escape_html(u_char *dst, u_char *src, size_t size)
+{
+    u_char      ch;
+    ngx_uint_t  i, len;
+
+    if (dst == NULL) {
+
+        len = 0;
+
+        for (i = 0; i < size; i++) {
+            switch (*src++) {
+
+            case '<':
+                len += sizeof("&lt;") - 2;
+                break;
+
+            case '>':
+                len += sizeof("&gt;") - 2;
+                break;
+
+            case '&':
+                len += sizeof("&amp;") - 2;
+                break;
+
+            default:
+                break;
+            }
+        }
+
+        return (uintptr_t) len;
+    }
+
+    for (i = 0; i < size; i++) {
+        ch = *src++;
+
+        switch (ch) {
+
+        case '<':
+            *dst++ = '&'; *dst++ = 'l'; *dst++ = 't'; *dst++ = ';';
+            break;
+
+        case '>':
+            *dst++ = '&'; *dst++ = 'g'; *dst++ = 't'; *dst++ = ';';
+            break;
+
+        case '&':
+            *dst++ = '&'; *dst++ = 'a'; *dst++ = 'm'; *dst++ = 'p';
+            *dst++ = ';';
+            break;
+
+        default:
+            *dst++ = ch;
+            break;
+        }
+    }
+
+    return (uintptr_t) dst;
+}
+
+
 /* ngx_sort() is implemented as insertion sort because we need stable sort */
 
 void