details: https://hg.nginx.org/nginx/rev/d6a5e14aa3e4
branches:
changeset: 7716:d6a5e14aa3e4
user: Ruslan Ermilov <ru@nginx.com>
date: Sun Sep 27 23:21:11 2020 +0300
description:
Proxy: added the "proxy_cookie_flags" directive.

diffstat:

src/http/modules/ngx_http_proxy_module.c | 586 +++++++++++++++++++++++++++++-
1 files changed, 554 insertions(+), 32 deletions(-)

diffs (725 lines):

diff -r 5c7917292b29 -r d6a5e14aa3e4 src/http/modules/ngx_http_proxy_module.c
--- a/src/http/modules/ngx_http_proxy_module.c Sun Sep 27 23:21:10 2020 +0300
+++ b/src/http/modules/ngx_http_proxy_module.c Sun Sep 27 23:21:11 2020 +0300
@@ -10,6 +10,19 @@
#include <ngx_http.h>


+#define NGX_HTTP_PROXY_COOKIE_SECURE 0x0001
+#define NGX_HTTP_PROXY_COOKIE_SECURE_ON 0x0002
+#define NGX_HTTP_PROXY_COOKIE_SECURE_OFF 0x0004
+#define NGX_HTTP_PROXY_COOKIE_HTTPONLY 0x0008
+#define NGX_HTTP_PROXY_COOKIE_HTTPONLY_ON 0x0010
+#define NGX_HTTP_PROXY_COOKIE_HTTPONLY_OFF 0x0020
+#define NGX_HTTP_PROXY_COOKIE_SAMESITE 0x0040
+#define NGX_HTTP_PROXY_COOKIE_SAMESITE_STRICT 0x0080
+#define NGX_HTTP_PROXY_COOKIE_SAMESITE_LAX 0x0100
+#define NGX_HTTP_PROXY_COOKIE_SAMESITE_NONE 0x0200
+#define NGX_HTTP_PROXY_COOKIE_SAMESITE_OFF 0x0400
+
+
typedef struct {
ngx_array_t caches; /* ngx_http_file_cache_t * */
} ngx_http_proxy_main_conf_t;
@@ -36,6 +49,19 @@ struct ngx_http_proxy_rewrite_s {


typedef struct {
+ union {
+ ngx_http_complex_value_t complex;
+#if (NGX_PCRE)
+ ngx_http_regex_t *regex;
+#endif
+ } cookie;
+
+ ngx_uint_t flags;
+ ngx_uint_t regex;
+} ngx_http_proxy_cookie_flags_t;
+
+
+typedef struct {
ngx_str_t key_start;
ngx_str_t schema;
ngx_str_t host_header;
@@ -72,6 +98,7 @@ typedef struct {
ngx_array_t *redirects;
ngx_array_t *cookie_domains;
ngx_array_t *cookie_paths;
+ ngx_array_t *cookie_flags;

ngx_http_complex_value_t *method;
ngx_str_t location;
@@ -158,8 +185,14 @@ static ngx_int_t ngx_http_proxy_rewrite_
ngx_table_elt_t *h, size_t prefix);
static ngx_int_t ngx_http_proxy_rewrite_cookie(ngx_http_request_t *r,
ngx_table_elt_t *h);
+static ngx_int_t ngx_http_proxy_parse_cookie(ngx_str_t *value,
+ ngx_array_t *attrs);
static ngx_int_t ngx_http_proxy_rewrite_cookie_value(ngx_http_request_t *r,
- ngx_table_elt_t *h, u_char *value, ngx_array_t *rewrites);
+ ngx_str_t *value, ngx_array_t *rewrites);
+static ngx_int_t ngx_http_proxy_rewrite_cookie_flags(ngx_http_request_t *r,
+ ngx_array_t *attrs, ngx_array_t *flags);
+static ngx_int_t ngx_http_proxy_edit_cookie_flags(ngx_http_request_t *r,
+ ngx_array_t *attrs, ngx_uint_t flags);
static ngx_int_t ngx_http_proxy_rewrite(ngx_http_request_t *r,
ngx_str_t *value, size_t prefix, size_t len, ngx_str_t *replacement);

@@ -180,6 +213,8 @@ static char *ngx_http_proxy_cookie_domai
void *conf);
static char *ngx_http_proxy_cookie_path(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
+static char *ngx_http_proxy_cookie_flags(ngx_conf_t *cf, ngx_command_t *cmd,
+ void *conf);
static char *ngx_http_proxy_store(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
#if (NGX_HTTP_CACHE)
@@ -282,6 +317,13 @@ static ngx_command_t ngx_http_proxy_com
0,
NULL },

+ { ngx_string("proxy_cookie_flags"),
+ NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1234,
+ ngx_http_proxy_cookie_flags,
+ NGX_HTTP_LOC_CONF_OFFSET,
+ 0,
+ NULL },
+
{ ngx_string("proxy_store"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_LOC_CONF|NGX_CONF_TAKE1,
ngx_http_proxy_store,
@@ -845,6 +887,36 @@ static ngx_path_init_t ngx_http_proxy_t
};


+static ngx_conf_bitmask_t ngx_http_proxy_cookie_flags_masks[] = {
+
+ { ngx_string("secure"),
+ NGX_HTTP_PROXY_COOKIE_SECURE|NGX_HTTP_PROXY_COOKIE_SECURE_ON },
+
+ { ngx_string("nosecure"),
+ NGX_HTTP_PROXY_COOKIE_SECURE|NGX_HTTP_PROXY_COOKIE_SECURE_OFF },
+
+ { ngx_string("httponly"),
+ NGX_HTTP_PROXY_COOKIE_HTTPONLY|NGX_HTTP_PROXY_COOKIE_HTTPONLY_ON },
+
+ { ngx_string("nohttponly"),
+ NGX_HTTP_PROXY_COOKIE_HTTPONLY|NGX_HTTP_PROXY_COOKIE_HTTPONLY_OFF },
+
+ { ngx_string("samesite=strict"),
+ NGX_HTTP_PROXY_COOKIE_SAMESITE|NGX_HTTP_PROXY_COOKIE_SAMESITE_STRICT },
+
+ { ngx_string("samesite=lax"),
+ NGX_HTTP_PROXY_COOKIE_SAMESITE|NGX_HTTP_PROXY_COOKIE_SAMESITE_LAX },
+
+ { ngx_string("samesite=none"),
+ NGX_HTTP_PROXY_COOKIE_SAMESITE|NGX_HTTP_PROXY_COOKIE_SAMESITE_NONE },
+
+ { ngx_string("nosamesite"),
+ NGX_HTTP_PROXY_COOKIE_SAMESITE|NGX_HTTP_PROXY_COOKIE_SAMESITE_OFF },
+
+ { ngx_null_string, 0 }
+};
+
+
static ngx_int_t
ngx_http_proxy_handler(ngx_http_request_t *r)
{
@@ -906,7 +978,7 @@ ngx_http_proxy_handler(ngx_http_request_
u->rewrite_redirect = ngx_http_proxy_rewrite_redirect;
}

- if (plcf->cookie_domains || plcf->cookie_paths) {
+ if (plcf->cookie_domains || plcf->cookie_paths || plcf->cookie_flags) {
u->rewrite_cookie = ngx_http_proxy_rewrite_cookie;
}

@@ -2598,27 +2670,41 @@ ngx_http_proxy_rewrite_redirect(ngx_http
static ngx_int_t
ngx_http_proxy_rewrite_cookie(ngx_http_request_t *r, ngx_table_elt_t *h)
{
- size_t prefix;
u_char *p;
+ size_t len;
ngx_int_t rc, rv;
+ ngx_str_t *key, *value;
+ ngx_uint_t i;
+ ngx_array_t attrs;
+ ngx_keyval_t *attr;
ngx_http_proxy_loc_conf_t *plcf;

- p = (u_char *) ngx_strchr(h->value.data, ';');
- if (p == NULL) {
+ ngx_array_init(&attrs, r->pool, 2, sizeof(ngx_keyval_t));
+
+ if (ngx_http_proxy_parse_cookie(&h->value, &attrs) != NGX_OK) {
+ return NGX_ERROR;
+ }
+
+ attr = attrs.elts;
+
+ if (attr[0].value.data == NULL) {
return NGX_DECLINED;
}

- prefix = p + 1 - h->value.data;
-
rv = NGX_DECLINED;

plcf = ngx_http_get_module_loc_conf(r, ngx_http_proxy_module);

- if (plcf->cookie_domains) {
- p = ngx_strcasestrn(h->value.data + prefix, "domain=", 7 - 1);
-
- if (p) {
- rc = ngx_http_proxy_rewrite_cookie_value(r, h, p + 7,
+ for (i = 1; i < attrs.nelts; i++) {
+
+ key = &attr[i].key;
+ value = &attr[i].value;
+
+ if (plcf->cookie_domains && key->len == 6
+ && ngx_strncasecmp(key->data, (u_char *) "domain", 6) == 0
+ && value->data)
+ {
+ rc = ngx_http_proxy_rewrite_cookie_value(r, value,
plcf->cookie_domains);
if (rc == NGX_ERROR) {
return NGX_ERROR;
@@ -2628,13 +2714,12 @@ ngx_http_proxy_rewrite_cookie(ngx_http_r
rv = rc;
}
}
- }
-
- if (plcf->cookie_paths) {
- p = ngx_strcasestrn(h->value.data + prefix, "path=", 5 - 1);
-
- if (p) {
- rc = ngx_http_proxy_rewrite_cookie_value(r, h, p + 5,
+
+ if (plcf->cookie_paths && key->len == 4
+ && ngx_strncasecmp(key->data, (u_char *) "path", 4) == 0
+ && value->data)
+ {
+ rc = ngx_http_proxy_rewrite_cookie_value(r, value,
plcf->cookie_paths);
if (rc == NGX_ERROR) {
return NGX_ERROR;
@@ -2646,30 +2731,153 @@ ngx_http_proxy_rewrite_cookie(ngx_http_r
}
}

- return rv;
+ if (plcf->cookie_flags) {
+ rc = ngx_http_proxy_rewrite_cookie_flags(r, &attrs,
+ plcf->cookie_flags);
+ if (rc == NGX_ERROR) {
+ return NGX_ERROR;
+ }
+
+ if (rc != NGX_DECLINED) {
+ rv = rc;
+ }
+
+ attr = attrs.elts;
+ }
+
+ if (rv != NGX_OK) {
+ return rv;
+ }
+
+ len = 0;
+
+ for (i = 0; i < attrs.nelts; i++) {
+
+ if (attr[i].key.data == NULL) {
+ continue;
+ }
+
+ if (i > 0) {
+ len += 2;
+ }
+
+ len += attr[i].key.len;
+
+ if (attr[i].value.data) {
+ len += 1 + attr[i].value.len;
+ }
+ }
+
+ p = ngx_pnalloc(r->pool, len + 1);
+ if (p == NULL) {
+ return NGX_ERROR;
+ }
+
+ h->value.data = p;
+ h->value.len = len;
+
+ for (i = 0; i < attrs.nelts; i++) {
+
+ if (attr[i].key.data == NULL) {
+ continue;
+ }
+
+ if (i > 0) {
+ *p++ = ';';
+ *p++ = ' ';
+ }
+
+ p = ngx_cpymem(p, attr[i].key.data, attr[i].key.len);
+
+ if (attr[i].value.data) {
+ *p++ = '=';
+ p = ngx_cpymem(p, attr[i].value.data, attr[i].value.len);
+ }
+ }
+
+ *p = '\0';
+
+ return NGX_OK;
}


static ngx_int_t
-ngx_http_proxy_rewrite_cookie_value(ngx_http_request_t *r, ngx_table_elt_t *h,
- u_char *value, ngx_array_t *rewrites)
+ngx_http_proxy_parse_cookie(ngx_str_t *value, ngx_array_t *attrs)
{
- size_t len, prefix;
- u_char *p;
+ u_char *start, *end, *p, *last;
+ ngx_str_t name, val;
+ ngx_keyval_t *attr;
+
+ start = value->data;
+ end = value->data + value->len;
+
+ for ( ;; ) {
+
+ last = (u_char *) ngx_strchr(start, ';');
+
+ if (last == NULL) {
+ last = end;
+ }
+
+ while (start < last && *start == ' ') { start++; }
+
+ for (p = start; p < last && *p != '='; p++) { /* void */ }
+
+ name.data = start;
+ name.len = p - start;
+
+ while (name.len && name.data[name.len - 1] == ' ') {
+ name.len--;
+ }
+
+ if (p < last) {
+
+ p++;
+
+ while (p < last && *p == ' ') { p++; }
+
+ val.data = p;
+ val.len = last - val.data;
+
+ while (val.len && val.data[val.len - 1] == ' ') {
+ val.len--;
+ }
+
+ } else {
+ ngx_str_null(&val);
+ }
+
+ attr = ngx_array_push(attrs);
+ if (attr == NULL) {
+ return NGX_ERROR;
+ }
+
+ attr->key = name;
+ attr->value = val;
+
+ if (last == end) {
+ break;
+ }
+
+ start = last + 1;
+ }
+
+ return NGX_OK;
+}
+
+
+static ngx_int_t
+ngx_http_proxy_rewrite_cookie_value(ngx_http_request_t *r, ngx_str_t *value,
+ ngx_array_t *rewrites)
+{
ngx_int_t rc;
ngx_uint_t i;
ngx_http_proxy_rewrite_t *pr;

- prefix = value - h->value.data;
-
- p = (u_char *) ngx_strchr(value, ';');
-
- len = p ? (size_t) (p - value) : (h->value.len - prefix);
-
pr = rewrites->elts;

for (i = 0; i < rewrites->nelts; i++) {
- rc = pr[i].handler(r, &h->value, prefix, len, &pr[i]);
+ rc = pr[i].handler(r, value, 0, value->len, &pr[i]);

if (rc != NGX_DECLINED) {
return rc;
@@ -2681,6 +2889,192 @@ ngx_http_proxy_rewrite_cookie_value(ngx_


static ngx_int_t
+ngx_http_proxy_rewrite_cookie_flags(ngx_http_request_t *r, ngx_array_t *attrs,
+ ngx_array_t *flags)
+{
+ ngx_str_t pattern;
+#if (NGX_PCRE)
+ ngx_int_t rc;
+#endif
+ ngx_uint_t i;
+ ngx_keyval_t *attr;
+ ngx_http_proxy_cookie_flags_t *pcf;
+
+ attr = attrs->elts;
+ pcf = flags->elts;
+
+ for (i = 0; i < flags->nelts; i++) {
+
+#if (NGX_PCRE)
+ if (pcf[i].regex) {
+ rc = ngx_http_regex_exec(r, pcf[i].cookie.regex, &attr[0].key);
+
+ if (rc == NGX_ERROR) {
+ return NGX_ERROR;
+ }
+
+ if (rc == NGX_OK) {
+ break;
+ }
+
+ /* NGX_DECLINED */
+
+ continue;
+ }
+#endif
+
+ if (ngx_http_complex_value(r, &pcf[i].cookie.complex, &pattern)
+ != NGX_OK)
+ {
+ return NGX_ERROR;
+ }
+
+ if (pattern.len == attr[0].key.len
+ && ngx_strncasecmp(attr[0].key.data, pattern.data, pattern.len)
+ == 0)
+ {
+ break;
+ }
+ }
+
+ if (i == flags->nelts) {
+ return NGX_DECLINED;
+ }
+
+ return ngx_http_proxy_edit_cookie_flags(r, attrs, pcf[i].flags);
+}
+
+
+static ngx_int_t
+ngx_http_proxy_edit_cookie_flags(ngx_http_request_t *r, ngx_array_t *attrs,
+ ngx_uint_t flags)
+{
+ ngx_str_t *key, *value;
+ ngx_uint_t i;
+ ngx_keyval_t *attr;
+
+ attr = attrs->elts;
+
+ for (i = 1; i < attrs->nelts; i++) {
+ key = &attr[i].key;
+
+ if (key->len == 6
+ && ngx_strncasecmp(key->data, (u_char *) "secure", 6) == 0)
+ {
+ if (flags & NGX_HTTP_PROXY_COOKIE_SECURE_ON) {
+ flags &= ~NGX_HTTP_PROXY_COOKIE_SECURE_ON;
+
+ } else if (flags & NGX_HTTP_PROXY_COOKIE_SECURE_OFF) {
+ key->data = NULL;
+ }
+
+ continue;
+ }
+
+ if (key->len == 8
+ && ngx_strncasecmp(key->data, (u_char *) "httponly", 8) == 0)
+ {
+ if (flags & NGX_HTTP_PROXY_COOKIE_HTTPONLY_ON) {
+ flags &= ~NGX_HTTP_PROXY_COOKIE_HTTPONLY_ON;
+
+ } else if (flags & NGX_HTTP_PROXY_COOKIE_HTTPONLY_OFF) {
+ key->data = NULL;
+ }
+
+ continue;
+ }
+
+ if (key->len == 8
+ && ngx_strncasecmp(key->data, (u_char *) "samesite", 8) == 0)
+ {
+ value = &attr[i].value;
+
+ if (flags & NGX_HTTP_PROXY_COOKIE_SAMESITE_STRICT) {
+ flags &= ~NGX_HTTP_PROXY_COOKIE_SAMESITE_STRICT;
+
+ if (value->len != 6
+ || ngx_strncasecmp(value->data, (u_char *) "strict", 6)
+ != 0)
+ {
+ ngx_str_set(key, "SameSite");
+ ngx_str_set(value, "Strict");
+ }
+
+ } else if (flags & NGX_HTTP_PROXY_COOKIE_SAMESITE_LAX) {
+ flags &= ~NGX_HTTP_PROXY_COOKIE_SAMESITE_LAX;
+
+ if (value->len != 3
+ || ngx_strncasecmp(value->data, (u_char *) "lax", 3) != 0)
+ {
+ ngx_str_set(key, "SameSite");
+ ngx_str_set(value, "Lax");
+ }
+
+ } else if (flags & NGX_HTTP_PROXY_COOKIE_SAMESITE_NONE) {
+ flags &= ~NGX_HTTP_PROXY_COOKIE_SAMESITE_NONE;
+
+ if (value->len != 4
+ || ngx_strncasecmp(value->data, (u_char *) "none", 4) != 0)
+ {
+ ngx_str_set(key, "SameSite");
+ ngx_str_set(value, "None");
+ }
+
+ } else if (flags & NGX_HTTP_PROXY_COOKIE_SAMESITE_OFF) {
+ key->data = NULL;
+ }
+
+ continue;
+ }
+ }
+
+ if (flags & NGX_HTTP_PROXY_COOKIE_SECURE_ON) {
+ attr = ngx_array_push(attrs);
+ if (attr == NULL) {
+ return NGX_ERROR;
+ }
+
+ ngx_str_set(&attr->key, "Secure");
+ ngx_str_null(&attr->value);
+ }
+
+ if (flags & NGX_HTTP_PROXY_COOKIE_HTTPONLY_ON) {
+ attr = ngx_array_push(attrs);
+ if (attr == NULL) {
+ return NGX_ERROR;
+ }
+
+ ngx_str_set(&attr->key, "HttpOnly");
+ ngx_str_null(&attr->value);
+ }
+
+ if (flags & (NGX_HTTP_PROXY_COOKIE_SAMESITE_STRICT
+ |NGX_HTTP_PROXY_COOKIE_SAMESITE_LAX
+ |NGX_HTTP_PROXY_COOKIE_SAMESITE_NONE))
+ {
+ attr = ngx_array_push(attrs);
+ if (attr == NULL) {
+ return NGX_ERROR;
+ }
+
+ ngx_str_set(&attr->key, "SameSite");
+
+ if (flags & NGX_HTTP_PROXY_COOKIE_SAMESITE_STRICT) {
+ ngx_str_set(&attr->value, "Strict");
+
+ } else if (flags & NGX_HTTP_PROXY_COOKIE_SAMESITE_LAX) {
+ ngx_str_set(&attr->value, "Lax");
+
+ } else {
+ ngx_str_set(&attr->value, "None");
+ }
+ }
+
+ return NGX_OK;
+}
+
+
+static ngx_int_t
ngx_http_proxy_rewrite_complex_handler(ngx_http_request_t *r, ngx_str_t *value,
size_t prefix, size_t len, ngx_http_proxy_rewrite_t *pr)
{
@@ -2742,7 +3136,7 @@ ngx_http_proxy_rewrite_domain_handler(ng

p = value->data + prefix;

- if (p[0] == '.') {
+ if (len && p[0] == '.') {
p++;
prefix++;
len--;
@@ -2955,6 +3349,7 @@ ngx_http_proxy_create_loc_conf(ngx_conf_

conf->cookie_domains = NGX_CONF_UNSET_PTR;
conf->cookie_paths = NGX_CONF_UNSET_PTR;
+ conf->cookie_flags = NGX_CONF_UNSET_PTR;

conf->http_version = NGX_CONF_UNSET_UINT;

@@ -3350,6 +3745,8 @@ ngx_http_proxy_merge_loc_conf(ngx_conf_t

ngx_conf_merge_ptr_value(conf->cookie_paths, prev->cookie_paths, NULL);

+ ngx_conf_merge_ptr_value(conf->cookie_flags, prev->cookie_flags, NULL);
+
ngx_conf_merge_uint_value(conf->http_version, prev->http_version,
NGX_HTTP_VERSION_10);

@@ -4081,6 +4478,131 @@ ngx_http_proxy_cookie_path(ngx_conf_t *c
}


+static char *
+ngx_http_proxy_cookie_flags(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
+{
+ ngx_http_proxy_loc_conf_t *plcf = conf;
+
+ ngx_str_t *value;
+ ngx_uint_t i, m;
+ ngx_conf_bitmask_t *mask;
+ ngx_http_proxy_cookie_flags_t *pcf;
+ ngx_http_compile_complex_value_t ccv;
+#if (NGX_PCRE)
+ ngx_regex_compile_t rc;
+ u_char errstr[NGX_MAX_CONF_ERRSTR];
+#endif
+
+ if (plcf->cookie_flags == NULL) {
+ return "is duplicate";
+ }
+
+ value = cf->args->elts;
+
+ if (cf->args->nelts == 2) {
+
+ if (ngx_strcmp(value[1].data, "off") == 0) {
+
+ if (plcf->cookie_flags != NGX_CONF_UNSET_PTR) {
+ return "is duplicate";
+ }
+
+ plcf->cookie_flags = NULL;
+ return NGX_CONF_OK;
+ }
+
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "invalid parameter \"%V\"", &value[1]);
+ return NGX_CONF_ERROR;
+ }
+
+ if (plcf->cookie_flags == NGX_CONF_UNSET_PTR) {
+ plcf->cookie_flags = ngx_array_create(cf->pool, 1,
+ sizeof(ngx_http_proxy_cookie_flags_t));
+ if (plcf->cookie_flags == NULL) {
+ return NGX_CONF_ERROR;
+ }
+ }
+
+ pcf = ngx_array_push(plcf->cookie_flags);
+ if (pcf == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ pcf->regex = 0;
+
+ if (value[1].data[0] == '~') {
+ value[1].len--;
+ value[1].data++;
+
+#if (NGX_PCRE)
+ ngx_memzero(&rc, sizeof(ngx_regex_compile_t));
+
+ rc.pattern = value[1];
+ rc.err.len = NGX_MAX_CONF_ERRSTR;
+ rc.err.data = errstr;
+ rc.options = NGX_REGEX_CASELESS;
+
+ pcf->cookie.regex = ngx_http_regex_compile(cf, &rc);
+ if (pcf->cookie.regex == NULL) {
+ return NGX_CONF_ERROR;
+ }
+
+ pcf->regex = 1;
+#else
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "using regex \"%V\" requires PCRE library",
+ &value[1]);
+ return NGX_CONF_ERROR;
+#endif
+
+ } else {
+
+ ngx_memzero(&ccv, sizeof(ngx_http_compile_complex_value_t));
+
+ ccv.cf = cf;
+ ccv.value = &value[1];
+ ccv.complex_value = &pcf->cookie.complex;
+
+ if (ngx_http_compile_complex_value(&ccv) != NGX_OK) {
+ return NGX_CONF_ERROR;
+ }
+ }
+
+ mask = ngx_http_proxy_cookie_flags_masks;
+ pcf->flags = 0;
+
+ for (i = 2; i < cf->args->nelts; i++) {
+ for (m = 0; mask[m].name.len != 0; m++) {
+
+ if (mask[m].name.len != value[i].len
+ || ngx_strcasecmp(mask[m].name.data, value[i].data) != 0)
+ {
+ continue;
+ }
+
+ if (pcf->flags & mask[m].mask) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "duplicate parameter \"%V\"", &value[i]);
+ return NGX_CONF_ERROR;
+ }
+
+ pcf->flags |= mask[m].mask;
+
+ break;
+ }
+
+ if (mask[m].name.len == 0) {
+ ngx_conf_log_error(NGX_LOG_EMERG, cf, 0,
+ "invalid parameter \"%V\"", &value[i]);
+ return NGX_CONF_ERROR;
+ }
+ }
+
+ return NGX_CONF_OK;
+}
+
+
static ngx_int_t
ngx_http_proxy_rewrite_regex(ngx_conf_t *cf, ngx_http_proxy_rewrite_t *pr,
ngx_str_t *regex, ngx_uint_t caseless)
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