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src/stream/ngx_stream_return_module.c - nginx source code
Global variables defined
Data types defined
Functions defined
Source code
- #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,
- NULL,
- NULL,
- NULL,
- ngx_stream_return_create_srv_conf,
- NULL
- };
- ngx_module_t ngx_stream_return_module = {
- NGX_MODULE_V1,
- &ngx_stream_return_module_ctx,
- ngx_stream_return_commands,
- NGX_STREAM_MODULE,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- NULL,
- 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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