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/*
* Copyright (C) Yichun Zhang (agentzh)
*/
#ifndef DDEBUG
#define DDEBUG 0
#endif
#include "ddebug.h"
#include "ngx_http_echo_sleep.h"
#include "ngx_http_echo_handler.h"
#include <nginx.h>
#include <ngx_log.h>
/* event handler for echo_sleep */
static void ngx_http_echo_post_sleep(ngx_http_request_t *r);
static void ngx_http_echo_sleep_cleanup(void *data);
ngx_int_t
ngx_http_echo_exec_echo_sleep(ngx_http_request_t *r,
ngx_http_echo_ctx_t *ctx, ngx_array_t *computed_args)
{
ngx_str_t *computed_arg;
ngx_str_t *computed_arg_elts;
ngx_int_t delay; /* in msec */
ngx_http_cleanup_t *cln;
computed_arg_elts = computed_args->elts;
computed_arg = &computed_arg_elts[0];
delay = ngx_atofp(computed_arg->data, computed_arg->len, 3);
if (delay == NGX_ERROR) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"invalid sleep duration \"%V\"", &computed_arg_elts[0]);
return NGX_HTTP_BAD_REQUEST;
}
dd("adding timer with delay %lu ms, r:%.*s", (unsigned long) delay,
(int) r->uri.len, r->uri.data);
ngx_add_timer(&ctx->sleep, (ngx_msec_t) delay);
/* we don't check broken downstream connections
* ourselves so even if the client shuts down
* the connection prematurely, nginx will still
* go on waiting for our timers to get properly
* expired. However, we'd still register a
* cleanup handler for completeness. */
cln = ngx_http_cleanup_add(r, 0);
if (cln == NULL) {
return NGX_ERROR;
}
cln->handler = ngx_http_echo_sleep_cleanup;
cln->data = r;
return NGX_AGAIN;
}
static void
ngx_http_echo_post_sleep(ngx_http_request_t *r)
{
ngx_http_echo_ctx_t *ctx;
/* ngx_int_t rc; */
dd("post sleep, r:%.*s", (int) r->uri.len, r->uri.data);
ctx = ngx_http_get_module_ctx(r, ngx_http_echo_module);
if (ctx == NULL) {
return;
}
ctx->waiting = 0;
ctx->done = 1;
dd("sleep: after get module ctx");
dd("timed out? %d", ctx->sleep.timedout);
dd("timer set? %d", ctx->sleep.timer_set);
if (!ctx->sleep.timedout) {
dd("HERE reached!");
return;
}
ctx->sleep.timedout = 0;
if (ctx->sleep.timer_set) {
dd("deleting timer for echo_sleep");
ngx_del_timer(&ctx->sleep);
}
/* r->write_event_handler = ngx_http_request_empty_handler; */
ngx_http_echo_wev_handler(r);
}
void
ngx_http_echo_sleep_event_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
ngx_http_request_t *r;
ngx_http_log_ctx_t *ctx;
r = ev->data;
c = r->connection;
if (c->destroyed) {
return;
}
if (c->error) {
ngx_http_finalize_request(r, NGX_ERROR);
return;
}
ctx = c->log->data;
ctx->current_request = r;
/* XXX when r->done == 1 we should do cleaning immediately
* and delete our timer and then quit. */
ngx_log_debug2(NGX_LOG_DEBUG_HTTP, c->log, 0,
"echo sleep event handler: \"%V?%V\"", &r->uri, &r->args);
/*
if (r->done) {
return;
}
*/
ngx_http_echo_post_sleep(r);
#if defined(nginx_version)
dd("before run posted requests");
ngx_http_run_posted_requests(c);
dd("after run posted requests");
#endif
}
ngx_int_t
ngx_http_echo_exec_echo_blocking_sleep(ngx_http_request_t *r,
ngx_http_echo_ctx_t *ctx, ngx_array_t *computed_args)
{
ngx_str_t *computed_arg;
ngx_str_t *computed_arg_elts;
ngx_int_t delay; /* in msec */
computed_arg_elts = computed_args->elts;
computed_arg = &computed_arg_elts[0];
delay = ngx_atofp(computed_arg->data, computed_arg->len, 3);
if (delay == NGX_ERROR) {
ngx_log_error(NGX_LOG_ERR, r->connection->log, 0,
"invalid sleep duration \"%V\"", &computed_arg_elts[0]);
return NGX_HTTP_BAD_REQUEST;
}
dd("blocking delay: %lu ms", (unsigned long) delay);
ngx_msleep((ngx_msec_t) delay);
return NGX_OK;
}
static void
ngx_http_echo_sleep_cleanup(void *data)
{
ngx_http_request_t *r = data;
ngx_http_echo_ctx_t *ctx;
dd("echo sleep cleanup");
ctx = ngx_http_get_module_ctx(r, ngx_http_echo_module);
if (ctx == NULL) {
return;
}
if (ctx->sleep.timer_set) {
dd("cleanup: deleting timer for echo_sleep");
ngx_del_timer(&ctx->sleep);
return;
}
dd("cleanup: timer not set");
}
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