nginx获取url参数

//声明部分
    ngx_str_t* name;
    ngx_http_variable_value_t* val;
    char temp[15];

//实现部分
        name=ngx_pnalloc(r->pool, sizeof(ngx_str_t));
        name->data="arg_test";
        name->len=sizeof("arg_test")-1;

        val=ngx_http_get_variable(r, name, 0);
        
        ZeroMemory(temp, sizeof(temp));
        memcpy(temp, val->data, val->len);
        OutputDebugStringA(temp);
        OutputDebugStringA("\n");