| |
| /* |
| * 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_buf_t buf; |
| } 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_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_close_connection(c); |
| return; |
| } |
| |
| ngx_log_debug1(NGX_LOG_DEBUG_STREAM, c->log, 0, |
| "stream return text: \"%V\"", &text); |
| |
| if (text.len == 0) { |
| ngx_stream_close_connection(c); |
| return; |
| } |
| |
| ctx = ngx_pcalloc(c->pool, sizeof(ngx_stream_return_ctx_t)); |
| if (ctx == NULL) { |
| ngx_stream_close_connection(c); |
| return; |
| } |
| |
| ngx_stream_set_ctx(s, ctx, ngx_stream_return_module); |
| |
| ctx->buf.pos = text.data; |
| ctx->buf.last = text.data + text.len; |
| |
| 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) |
| { |
| ssize_t n; |
| ngx_buf_t *b; |
| 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_close_connection(c); |
| return; |
| } |
| |
| if (ev->ready) { |
| ctx = ngx_stream_get_module_ctx(s, ngx_stream_return_module); |
| |
| b = &ctx->buf; |
| |
| n = c->send(c, b->pos, b->last - b->pos); |
| if (n == NGX_ERROR) { |
| ngx_stream_close_connection(c); |
| return; |
| } |
| |
| if (n > 0) { |
| b->pos += n; |
| |
| if (b->pos == b->last) { |
| ngx_stream_close_connection(c); |
| return; |
| } |
| } |
| } |
| |
| if (ngx_handle_write_event(ev, 0) != NGX_OK) { |
| ngx_stream_close_connection(c); |
| 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; |
| } |