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/*
* 2010 (C) Marcus Clyne
*/
#include <ndk.h>
static ngx_int_t ngx_http_set_var_concat2 (ngx_http_request_t *r, ngx_str_t *val, ngx_http_variable_value_t *v);
static char * ngx_http_set_prepend_hello (ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static ndk_set_var_t ngx_http_var_set_concat2 = {
NDK_SET_VAR_MULTI_VALUE,
ngx_http_set_var_concat2,
2,
NULL
};
static ngx_command_t ngx_http_set_var_examples_commands[] = {
{
ngx_string ("set_concat2"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE3,
ndk_set_var_multi_value,
0,
0,
&ngx_http_var_set_concat2
},
{
ngx_string ("set_prepend_hello"),
NGX_HTTP_MAIN_CONF|NGX_HTTP_SRV_CONF|NGX_HTTP_SIF_CONF|NGX_HTTP_LOC_CONF|NGX_HTTP_LIF_CONF|NGX_CONF_TAKE1,
ngx_http_set_prepend_hello,
0,
0,
NULL
},
ngx_null_command
};
ngx_http_module_t ngx_http_set_var_examples_module_ctx = {NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL};
ngx_module_t ngx_http_set_var_examples_module = {
NGX_MODULE_V1,
&ngx_http_set_var_examples_module_ctx, // module context
ngx_http_set_var_examples_commands, // module directives
NGX_HTTP_MODULE, // module type
NULL, // init master
NULL, // init module
NULL, // init process
NULL, // init thread
NULL, // exit thread
NULL, // exit process
NULL, // exit master
NGX_MODULE_V1_PADDING
};
/*
This function is called by both examples, takes two variable values and concatenates them
to give a third string.
*/
static ngx_int_t
ngx_http_set_var_concat2 (ngx_http_request_t *r, ngx_str_t *val, ngx_http_variable_value_t *v)
{
size_t len;
ngx_http_variable_value_t *v2;
u_char *p;
v2 = v + 1;
len = v->len + v2->len;
/*
* NDK provided abbreviation for the following code:
*
* p = ngx_palloc (r->pool, len);
* if (p == NULL)
* return NGX_ERROR;
*
* */
ndk_palloc_re(p, r->pool, len);
val->data = p;
val->len = len;
ngx_memzero (p, len);
p = ngx_cpymem (p, v->data, v->len);
ngx_memcpy (p, v2->data, v2->len);
return NGX_OK;
}
/*
This function demonstrates using the 'core' function in a function that appends the word
'hello_' to the beginning of a variable.
set $var world;
set_prepend_hello $var $var;
If the arguments used in the variable value filter do not all come directly from the conf
file, or are not given in the order
direcive $var_name val1 "val2 string $var" ...
then the _core functions should be used inside the function that is called when the directive
is read.
*/
static char *
ngx_http_set_prepend_hello (ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_str_t s[2], *var_name;
ndk_set_var_t filter;
var_name = cf->args->elts;
var_name++;
s[0].data = (u_char*) "hello_";
s[0].len = 6;
s[1] = *(var_name + 1);
filter.type = NDK_SET_VAR_MULTI_VALUE;
filter.func = ngx_http_set_var_concat2;
filter.size = 2;
return ndk_set_var_multi_value_core (cf, var_name, (ngx_str_t *) s, &filter);
}
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