From 9f958f5b9b071db4a69d7a02db4c4bbe5fd374b9 Mon Sep 17 00:00:00 2001
From: Igor Sysoev <igor@sysoev.ru>
Date: Wed, 1 Apr 2009 15:36:15 +0000
Subject: [PATCH] r2138, r2308, r2360 merge: $arg_... and $cookie_ variables

---
 src/http/ngx_http_request.c   |   1 +
 src/http/ngx_http_variables.c | 120 ++++++++++++++++++++++++++++++++++
 2 files changed, 121 insertions(+)

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 738c1fde9..ed48a6efe 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -650,6 +650,7 @@ ngx_http_process_request_line(ngx_event_t *rev)
 
             r->request_line.len = r->request_end - r->request_start;
             r->request_line.data = r->request_start;
+            *r->request_end = '\0';
 
 
             if (r->args_start) {
diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
index 16f092305..9f6e2d166 100644
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -26,6 +26,10 @@ static ngx_int_t ngx_http_variable_unknown_header_in(ngx_http_request_t *r,
     ngx_http_variable_value_t *v, uintptr_t data);
 static ngx_int_t ngx_http_variable_unknown_header_out(ngx_http_request_t *r,
     ngx_http_variable_value_t *v, uintptr_t data);
+static ngx_int_t ngx_http_variable_cookie(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data);
+static ngx_int_t ngx_http_variable_argument(ngx_http_request_t *r,
+    ngx_http_variable_value_t *v, uintptr_t data);
 
 static ngx_int_t ngx_http_variable_host(ngx_http_request_t *r,
     ngx_http_variable_value_t *v, uintptr_t data);
@@ -481,6 +485,24 @@ ngx_http_get_variable(ngx_http_request_t *r, ngx_str_t *name, ngx_uint_t key,
         return NULL;
     }
 
+    if (ngx_strncmp(name->data, "cookie_", 7) == 0) {
+
+        if (ngx_http_variable_cookie(r, vv, (uintptr_t) name) == NGX_OK) {
+            return vv;
+        }
+
+        return NULL;
+    }
+
+    if (ngx_strncmp(name->data, "arg_", 4) == 0) {
+
+        if (ngx_http_variable_argument(r, vv, (uintptr_t) name) == NGX_OK) {
+            return vv;
+        }
+
+        return NULL;
+    }
+
     vv->not_found = 1;
 
     if (nowarn == 0) {
@@ -711,6 +733,90 @@ ngx_http_variable_unknown_header(ngx_http_variable_value_t *v, ngx_str_t *var,
 }
 
 
+static ngx_int_t
+ngx_http_variable_cookie(ngx_http_request_t *r, ngx_http_variable_value_t *v,
+    uintptr_t data)
+{
+    ngx_str_t *name = (ngx_str_t *) data;
+
+    ngx_str_t  cookie, s;
+
+    s.len = name->len - (sizeof("cookie_") - 1);
+    s.data = name->data + sizeof("cookie_") - 1;
+
+    if (ngx_http_parse_multi_header_lines(&r->headers_in.cookies, &s, &cookie)
+        == NGX_DECLINED)
+    {
+        v->not_found = 1;
+        return NGX_OK;
+    }
+
+    v->len = cookie.len;
+    v->valid = 1;
+    v->no_cacheable = 0;
+    v->not_found = 0;
+    v->data = cookie.data;
+
+    return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_variable_argument(ngx_http_request_t *r, ngx_http_variable_value_t *v,
+    uintptr_t data)
+{
+    ngx_str_t *name = (ngx_str_t *) data;
+
+    u_char  *p, *arg;
+    size_t   len;
+
+    if (r->args.len == 0) {
+        v->not_found = 1;
+        return NGX_OK;
+    }
+
+    len = name->len - 1 - (sizeof("arg_") - 1);
+    arg = name->data + sizeof("arg_") - 1;
+
+    for (p = r->args.data; *p && *p != ' '; p++) {
+
+        /*
+         * although r->args.data is not null-terminated by itself,
+         * however, there is null in the end of request line
+         */
+
+        p = ngx_strcasestrn(p, (char *) arg, len);
+
+        if (p == NULL) {
+            v->not_found = 1;
+            return NGX_OK;
+        }
+
+        if ((p == r->args.data || *(p - 1) == '&') && *(p + len + 1) == '=') {
+
+            v->data = p + len + 2;
+
+            p = (u_char *) ngx_strchr(p, '&');
+
+            if (p == NULL) {
+                p = r->args.data + r->args.len;
+            }
+
+            v->len = p - v->data;
+            v->valid = 1;
+            v->no_cacheable = 0;
+            v->not_found = 0;
+
+            return NGX_OK;
+        }
+    }
+
+    v->not_found = 1;
+
+    return NGX_OK;
+}
+
+
 static ngx_int_t
 ngx_http_variable_host(ngx_http_request_t *r, ngx_http_variable_value_t *v,
     uintptr_t data)
@@ -1396,6 +1502,20 @@ ngx_http_variables_init_vars(ngx_conf_t *cf)
             continue;
         }
 
+        if (ngx_strncmp(v[i].name.data, "cookie_", 7) == 0) {
+            v[i].get_handler = ngx_http_variable_cookie;
+            v[i].data = (uintptr_t) &v[i].name;
+
+            continue;
+        }
+
+        if (ngx_strncmp(v[i].name.data, "arg_", 4) == 0) {
+            v[i].get_handler = ngx_http_variable_argument;
+            v[i].data = (uintptr_t) &v[i].name;
+
+            continue;
+        }
+
         ngx_log_error(NGX_LOG_EMERG, cf->log, 0,
                       "unknown \"%V\" variable", &v[i].name);