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/*
* Copyright (C) Yichun Zhang (agentzh)
*/
#ifndef NGX_HTTP_ECHO_MODULE_H
#define NGX_HTTP_ECHO_MODULE_H
#include <ngx_core.h>
#include <ngx_http.h>
#include <nginx.h>
extern ngx_module_t ngx_http_echo_module;
/* config directive's opcode */
typedef enum {
echo_opcode_echo_sync,
echo_opcode_echo,
echo_opcode_echo_request_body,
echo_opcode_echo_sleep,
echo_opcode_echo_flush,
echo_opcode_echo_blocking_sleep,
echo_opcode_echo_reset_timer,
echo_opcode_echo_before_body,
echo_opcode_echo_after_body,
echo_opcode_echo_location_async,
echo_opcode_echo_location,
echo_opcode_echo_subrequest_async,
echo_opcode_echo_subrequest,
echo_opcode_echo_duplicate,
echo_opcode_echo_read_request_body,
echo_opcode_echo_foreach_split,
echo_opcode_echo_end,
echo_opcode_echo_abort_parent,
echo_opcode_echo_exec
} ngx_http_echo_opcode_t;
/* all the various config directives (or commands) are
* divided into two categories: "handler commands",
* and "filter commands". For instance, the "echo"
* directive is a handler command while
* "echo_before_body" is a filter one. */
typedef enum {
echo_handler_cmd,
echo_filter_cmd
} ngx_http_echo_cmd_category_t;
/* compiled form of a config directive argument's value */
typedef struct {
/* holds the raw string of the argument value */
ngx_str_t raw_value;
/* fields "lengths" and "values" are set by
* the function ngx_http_script_compile,
* iff the argument value indeed contains
* nginx variables like "$foo" */
ngx_array_t *lengths;
ngx_array_t *values;
} ngx_http_echo_arg_template_t;
/* represent a config directive (or command) like "echo". */
typedef struct {
ngx_http_echo_opcode_t opcode;
/* each argument is of type echo_arg_template_t: */
ngx_array_t *args;
} ngx_http_echo_cmd_t;
/* location config struct */
typedef struct {
/* elements of the following arrays are of type
* ngx_http_echo_cmd_t */
ngx_array_t *handler_cmds;
ngx_array_t *before_body_cmds;
ngx_array_t *after_body_cmds;
unsigned seen_leading_output;
ngx_int_t status;
} ngx_http_echo_loc_conf_t;
typedef struct {
ngx_int_t requires_filter;
#if nginx_version >= 1011011
ngx_buf_t **busy_buf_ptrs;
ngx_int_t busy_buf_ptr_count;
#endif
} ngx_http_echo_main_conf_t;
typedef struct {
ngx_array_t *choices; /* items after splitting */
ngx_uint_t next_choice; /* current item index */
ngx_uint_t cmd_index; /* cmd index for the echo_foreach direcitve */
} ngx_http_echo_foreach_ctx_t;
/* context struct in the request handling cycle, holding
* the current states of the command evaluator */
typedef struct {
/* index of the next handler command in
* ngx_http_echo_loc_conf_t's "handler_cmds" array. */
ngx_uint_t next_handler_cmd;
/* index of the next before-body filter command in
* ngx_http_echo_loc_conf_t's "before_body_cmds" array. */
ngx_uint_t next_before_body_cmd;
/* index of the next after-body filter command in
* ngx_http_echo_loc_conf_t's "after_body_cmds" array. */
ngx_uint_t next_after_body_cmd;
ngx_http_echo_foreach_ctx_t *foreach;
ngx_time_t timer_begin;
ngx_event_t sleep;
ngx_uint_t counter;
unsigned before_body_sent:1;
unsigned skip_filter:1;
unsigned wait_read_request_body:1;
unsigned waiting:1;
unsigned done:1;
unsigned run_post_subrequest:1;
unsigned header_sent:1; /* r->header_sent is not sufficient
* because special header filters like
* ngx_http_image_filter_module's may
* intercept the whole header filter chain
* leaving r->header_sent unset. So we
* should always test both flags. */
} ngx_http_echo_ctx_t;
#endif /* NGX_HTTP_ECHO_MODULE_H */
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