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use header specific handler in add_handler,

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"Last-Modified" header handler
This commit is contained in:
Igor Sysoev 2007-08-01 14:01:30 +00:00
parent 36c0deafb3
commit 82b5a31e2d
1 changed files with 117 additions and 22 deletions
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139
src/http/modules/ngx_http_headers_filter_module.c
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@ -9,17 +9,32 @@
#include <ngx_http.h>
typedef struct {
ngx_table_elt_t value;
ngx_array_t *lengths;
ngx_array_t *values;
} ngx_http_header_val_t;
typedef struct ngx_http_header_val_s ngx_http_header_val_t;
typedef ngx_int_t (*ngx_http_set_header_pt)(ngx_http_request_t *r,
ngx_http_header_val_t *hv, ngx_str_t *value);
typedef struct {
time_t expires;
ngx_str_t cache_control;
ngx_array_t *headers;
ngx_str_t name;
ngx_uint_t offset;
ngx_http_set_header_pt handler;
} ngx_http_set_header_t;
struct ngx_http_header_val_s {
ngx_table_elt_t value;
ngx_uint_t offset;
ngx_http_set_header_pt handler;
ngx_array_t *lengths;
ngx_array_t *values;
};
typedef struct {
time_t expires;
ngx_str_t cache_control;
ngx_array_t *headers;
} ngx_http_headers_conf_t;
@ -29,6 +44,11 @@ typedef struct {
#define NGX_HTTP_EXPIRES_MAX -2147483644
static ngx_int_t ngx_http_add_header(ngx_http_request_t *r,
ngx_http_header_val_t *hv, ngx_str_t *value);
static ngx_int_t ngx_http_set_last_modified(ngx_http_request_t *r,
ngx_http_header_val_t *hv, ngx_str_t *value);
static void *ngx_http_headers_create_conf(ngx_conf_t *cf);
static char *ngx_http_headers_merge_conf(ngx_conf_t *cf,
void *parent, void *child);
@ -39,6 +59,16 @@ static char *ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd,
void *conf);
static ngx_http_set_header_t ngx_http_set_headers[] = {
{ ngx_string("Last-Modified"),
offsetof(ngx_http_headers_out_t, last_modified),
ngx_http_set_last_modified },
{ ngx_null_string, 0, NULL }
};
static ngx_command_t ngx_http_headers_filter_commands[] = {
{ ngx_string("expires"),
@ -99,8 +129,9 @@ static ngx_int_t
ngx_http_headers_filter(ngx_http_request_t *r)
{
size_t len;
ngx_str_t value;
ngx_uint_t i;
ngx_table_elt_t *expires, *cc, **ccp, *out;
ngx_table_elt_t *expires, *cc, **ccp;
ngx_http_header_val_t *h;
ngx_http_headers_conf_t *conf;
@ -255,23 +286,20 @@ ngx_http_headers_filter(ngx_http_request_t *r)
if (conf->headers) {
h = conf->headers->elts;
for (i = 0; i < conf->headers->nelts; i++) {
out = ngx_list_push(&r->headers_out.headers);
if (out == NULL) {
return NGX_ERROR;
}
out->hash = h[i].value.hash;
out->key = h[i].value.key;
if (h[i].lengths == NULL) {
out->value = h[i].value.value;
continue;
value = h[i].value.value;
} else {
if (ngx_http_script_run(r, &value, h[i].lengths->elts, 0,
h[i].values->elts)
== NULL)
{
return NGX_ERROR;
}
}
if (ngx_http_script_run(r, &out->value, h[i].lengths->elts, 0,
h[i].values->elts)
== NULL)
{
if (h[i].handler(r, &h[i], &value) != NGX_OK) {
return NGX_ERROR;
}
}
@ -281,6 +309,58 @@ ngx_http_headers_filter(ngx_http_request_t *r)
}
static ngx_int_t
ngx_http_add_header(ngx_http_request_t *r, ngx_http_header_val_t *hv,
ngx_str_t *value)
{
ngx_table_elt_t *h;
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL) {
return NGX_ERROR;
}
h->hash = hv->value.hash;
h->key = hv->value.key;
h->value = *value;
return NGX_OK;
}
static ngx_int_t
ngx_http_set_last_modified(ngx_http_request_t *r, ngx_http_header_val_t *hv,
ngx_str_t *value)
{
ngx_table_elt_t *h, **old;
if (hv->offset) {
old = (ngx_table_elt_t **) ((char *) &r->headers_out + hv->offset);
} else {
old = NULL;
}
if (old == NULL || *old == NULL) {
h = ngx_list_push(&r->headers_out.headers);
if (h == NULL) {
return NGX_ERROR;
}
} else {
h = *old;
}
h->hash = hv->value.hash;
h->key = hv->value.key;
h->value = *value;
r->headers_out.last_modified_time = -1;
return NGX_OK;
}
static void *
ngx_http_headers_create_conf(ngx_conf_t *cf)
{
@ -406,7 +486,9 @@ ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
ngx_int_t n;
ngx_str_t *value;
ngx_uint_t i;
ngx_http_header_val_t *h;
ngx_http_set_header_t *sh;
ngx_http_script_compile_t sc;
value = cf->args->elts;
@ -432,9 +514,22 @@ ngx_http_headers_add(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
h->value.hash = 1;
h->value.key = value[1];
h->value.value = value[2];
h->offset = 0;
h->handler = ngx_http_add_header;
h->lengths = NULL;
h->values = NULL;
sh = ngx_http_set_headers;
for (i = 0; sh[i].name.len; i++) {
if (ngx_strcasecmp(value[1].data, sh[i].name.data) != 0) {
continue;
}
h->offset = sh[i].offset;
h->handler = sh[i].handler;
break;
}
n = ngx_http_script_variables_count(&value[2]);
if (n == 0) {