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/*
* Copyright (C) Roman Arutyunyan
* Copyright (C) Nginx, Inc.
*/
#include <ngx_config.h>
#include <ngx_core.h>
#include <ngx_stream.h>
typedef struct {
ngx_stream_complex_value_t text;
} ngx_stream_return_srv_conf_t;
typedef struct {
ngx_chain_t *out;
} ngx_stream_return_ctx_t;
static void ngx_stream_return_handler(ngx_stream_session_t *s);
static void ngx_stream_return_write_handler(ngx_event_t *ev);
static void *ngx_stream_return_create_srv_conf(ngx_conf_t *cf);
static char *ngx_stream_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf);
static ngx_command_t ngx_stream_return_commands[] = {
{ ngx_string("return"),
NGX_STREAM_SRV_CONF|NGX_CONF_TAKE1,
ngx_stream_return,
NGX_STREAM_SRV_CONF_OFFSET,
0,
NULL },
ngx_null_command
};
static ngx_stream_module_t ngx_stream_return_module_ctx = {
NULL, /* preconfiguration */
NULL, /* postconfiguration */
NULL, /* create main configuration */
NULL, /* init main configuration */
ngx_stream_return_create_srv_conf, /* create server configuration */
NULL /* merge server configuration */
};
ngx_module_t ngx_stream_return_module = {
NGX_MODULE_V1,
&ngx_stream_return_module_ctx, /* module context */
ngx_stream_return_commands, /* module directives */
NGX_STREAM_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
};
static void
ngx_stream_return_handler(ngx_stream_session_t *s)
{
ngx_str_t text;
ngx_buf_t *b;
ngx_connection_t *c;
ngx_stream_return_ctx_t *ctx;
ngx_stream_return_srv_conf_t *rscf;
c = s->connection;
c->log->action = "returning text";
rscf = ngx_stream_get_module_srv_conf(s, ngx_stream_return_module);
if (ngx_stream_complex_value(s, &rscf->text, &text) != NGX_OK) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream return text: \"%V\"", &text);
if (text.len == 0) {
ngx_stream_finalize_session(s, NGX_STREAM_OK);
return;
}
ctx = ngx_pcalloc(c->pool, sizeof(ngx_stream_return_ctx_t));
if (ctx == NULL) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ngx_stream_set_ctx(s, ctx, ngx_stream_return_module);
b = ngx_calloc_buf(c->pool);
if (b == NULL) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
b->memory = 1;
b->pos = text.data;
b->last = text.data + text.len;
b->last_buf = 1;
ctx->out = ngx_alloc_chain_link(c->pool);
if (ctx->out == NULL) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ctx->out->buf = b;
ctx->out->next = NULL;
c->write->handler = ngx_stream_return_write_handler;
ngx_stream_return_write_handler(c->write);
}
static void
ngx_stream_return_write_handler(ngx_event_t *ev)
{
ngx_connection_t *c;
ngx_stream_session_t *s;
ngx_stream_return_ctx_t *ctx;
c = ev->data;
s = c->data;
if (ev->timedout) {
ngx_connection_error(c, NGX_ETIMEDOUT, "connection timed out");
ngx_stream_finalize_session(s, NGX_STREAM_OK);
return;
}
ctx = ngx_stream_get_module_ctx(s, ngx_stream_return_module);
if (ngx_stream_top_filter(s, ctx->out, 1) == NGX_ERROR) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ctx->out = NULL;
if (!c->buffered) {
ngx_log_debug0(NGX_LOG_DEBUG_STREAM, c->log, 0,
"stream return done sending");
ngx_stream_finalize_session(s, NGX_STREAM_OK);
return;
}
if (ngx_handle_write_event(ev, 0) != NGX_OK) {
ngx_stream_finalize_session(s, NGX_STREAM_INTERNAL_SERVER_ERROR);
return;
}
ngx_add_timer(ev, 5000);
}
static void *
ngx_stream_return_create_srv_conf(ngx_conf_t *cf)
{
ngx_stream_return_srv_conf_t *conf;
conf = ngx_pcalloc(cf->pool, sizeof(ngx_stream_return_srv_conf_t));
if (conf == NULL) {
return NULL;
}
return conf;
}
static char *
ngx_stream_return(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
{
ngx_stream_return_srv_conf_t *rscf = conf;
ngx_str_t *value;
ngx_stream_core_srv_conf_t *cscf;
ngx_stream_compile_complex_value_t ccv;
if (rscf->text.value.data) {
return "is duplicate";
}
value = cf->args->elts;
ngx_memzero(&ccv, sizeof(ngx_stream_compile_complex_value_t));
ccv.cf = cf;
ccv.value = &value[1];
ccv.complex_value = &rscf->text;
if (ngx_stream_compile_complex_value(&ccv) != NGX_OK) {
return NGX_CONF_ERROR;
}
cscf = ngx_stream_conf_get_module_srv_conf(cf, ngx_stream_core_module);
cscf->handler = ngx_stream_return_handler;
return NGX_CONF_OK;
}
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