diff options
Diffstat (limited to 'src/fluent-bit/plugins/out_slack/slack.c')
| -rw-r--r-- | src/fluent-bit/plugins/out_slack/slack.c | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/src/fluent-bit/plugins/out_slack/slack.c b/src/fluent-bit/plugins/out_slack/slack.c new file mode 100644 index 000000000..f014228e9 --- /dev/null +++ b/src/fluent-bit/plugins/out_slack/slack.c @@ -0,0 +1,336 @@ +/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ + +/* Fluent Bit + * ========== + * Copyright (C) 2015-2022 The Fluent Bit Authors + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include <fluent-bit/flb_output_plugin.h> +#include <fluent-bit/flb_pack.h> +#include <fluent-bit/flb_utils.h> +#include <fluent-bit/flb_http_client.h> +#include <fluent-bit/flb_log_event_decoder.h> + +#include "slack.h" + +#define FLB_HTTP_CONTENT_TYPE "Content-Type" +#define FLB_HTTP_MIME_JSON "application/json" + +static int cb_slack_init(struct flb_output_instance *ins, + struct flb_config *config, void *data) +{ + int ret; + char *protocol = NULL; + char *host = NULL; + char *port = NULL; + char *uri = NULL; + struct flb_slack *ctx; + (void) config; + (void) data; + + /* Allocate context */ + ctx = flb_calloc(1, sizeof(struct flb_slack)); + if (!ctx) { + flb_errno(); + return -1; + } + ctx->ins = ins; + + /* Set the plugin context */ + flb_output_set_context(ins, ctx); + + /* Create config map and validate expected parameters */ + ret = flb_output_config_map_set(ins, (void *) ctx); + if (ret == -1) { + flb_free(ctx); + return -1; + } + + /* Validate if the slack webhook is defined */ + if (!ctx->webhook) { + flb_plg_error(ctx->ins, "the 'webhook' address has not been defined"); + return -1; + } + + /* Split the address */ + ret = flb_utils_url_split(ctx->webhook, &protocol, &host, &port, &uri); + if (ret == -1) { + flb_plg_error(ctx->ins, "could not process 'webhook' address"); + return -1; + } + + if (strcasecmp(protocol, "https") != 0) { + flb_plg_error(ctx->ins, "invalid protocol '%s', we expected 'https'", + protocol); + goto error; + } + + if (!host) { + flb_plg_error(ctx->ins, "invalid slack host"); + goto error; + } + + if (!uri) { + flb_plg_error(ctx->ins, "slack webhook uri has not been defined"); + goto error; + } + + ctx->host = flb_sds_create(host); + ctx->uri = flb_sds_create(uri); + + if (port) { + ctx->port = atoi(port); + } + else { + ctx->port = 443; + } + + /* Create upstream context */ + ctx->u = flb_upstream_create(config, + ctx->host, + ctx->port, + FLB_IO_TLS, ins->tls); + if (!ctx->u) { + flb_plg_error(ctx->ins, "error creating upstream context"); + goto error; + } + + /* Set instance flags into upstream */ + flb_output_upstream_set(ctx->u, ins); + + /* Cleanup */ + if (protocol) { + flb_free(protocol); + } + if (host) { + flb_free(host); + } + if (port) { + flb_free(port); + } + if (uri) { + flb_free(uri); + } + + return 0; + +error: + if (protocol) { + flb_free(protocol); + } + if (host) { + flb_free(host); + } + if (port) { + flb_free(port); + } + if (uri) { + flb_free(uri); + } + + return -1; +} + +static void cb_slack_flush(struct flb_event_chunk *event_chunk, + struct flb_output_flush *out_flush, + struct flb_input_instance *i_ins, + void *out_context, + struct flb_config *config) +{ + int len; + int ret; + int out_ret = FLB_OK; + size_t size; + size_t printed = 0; + size_t b_sent; + flb_sds_t json; + flb_sds_t out_buf; + msgpack_sbuffer mp_sbuf; + msgpack_packer mp_pck; + struct flb_http_client *c; + struct flb_connection *u_conn; + struct flb_slack *ctx = out_context; + struct flb_log_event_decoder log_decoder; + struct flb_log_event log_event; + + size = event_chunk->size * 4; + json = flb_sds_create_size(size); + if (!json) { + FLB_OUTPUT_RETURN(FLB_RETRY); + } + memset(json, '\0', size); + + ret = flb_log_event_decoder_init(&log_decoder, + (char *) event_chunk->data, + event_chunk->size); + + if (ret != FLB_EVENT_DECODER_SUCCESS) { + flb_plg_error(ctx->ins, + "Log event decoder initialization error : %d", ret); + + flb_sds_destroy(json); + + FLB_OUTPUT_RETURN(FLB_RETRY); + } + + while ((ret = flb_log_event_decoder_next( + &log_decoder, + &log_event)) == FLB_EVENT_DECODER_SUCCESS) { + + ret = snprintf(json + printed, size - printed, + "[\"timestamp\": %" PRIu32 ".%09lu, ", + (uint32_t) log_event.timestamp.tm.tv_sec, + log_event.timestamp.tm.tv_nsec); + printed += ret; + + ret = msgpack_object_print_buffer(json + printed, + size - printed, + *log_event.body); + if (ret < 0) { + flb_plg_error(ctx->ins, "error formatting payload"); + flb_sds_destroy(json); + flb_log_event_decoder_destroy(&log_decoder); + + FLB_OUTPUT_RETURN(FLB_RETRY); + } + + /* the previous call returns the remaining available space in the buffer */ + printed += ret; + json[printed++] = ']'; + json[printed++] = '\n'; + } + + flb_log_event_decoder_destroy(&log_decoder); + + /* Take formatted message and convert it to msgpack */ + msgpack_sbuffer_init(&mp_sbuf); + msgpack_packer_init(&mp_pck, &mp_sbuf, msgpack_sbuffer_write); + + len = strlen(json); + + msgpack_pack_map(&mp_pck, 1); + msgpack_pack_str(&mp_pck, 4); + msgpack_pack_str_body(&mp_pck, "text", 4); + msgpack_pack_str(&mp_pck, len); + msgpack_pack_str_body(&mp_pck, json, len); + + /* Release buffer */ + flb_sds_destroy(json); + + /* Re-format mspgack as JSON */ + out_buf = flb_msgpack_raw_to_json_sds(mp_sbuf.data, mp_sbuf.size); + if (!out_buf) { + msgpack_sbuffer_destroy(&mp_sbuf); + FLB_OUTPUT_RETURN(FLB_RETRY); + } + msgpack_sbuffer_destroy(&mp_sbuf); + + /* Create upstream connection */ + u_conn = flb_upstream_conn_get(ctx->u); + if (!u_conn) { + flb_sds_destroy(out_buf); + FLB_OUTPUT_RETURN(FLB_RETRY); + } + + /* Create HTTP client context */ + c = flb_http_client(u_conn, FLB_HTTP_POST, ctx->uri, + out_buf, flb_sds_len(out_buf), + ctx->host, ctx->port, + NULL, 0); + flb_http_add_header(c, + FLB_HTTP_CONTENT_TYPE, + sizeof(FLB_HTTP_CONTENT_TYPE) - 1, + FLB_HTTP_MIME_JSON, + sizeof(FLB_HTTP_MIME_JSON) - 1); + flb_http_add_header(c, "User-Agent", 10, "Fluent-Bit", 10); + + ret = flb_http_do(c, &b_sent); + if (ret == 0) { + if (c->resp.status < 200 || c->resp.status > 205) { + flb_plg_error(ctx->ins, "%s:%i, HTTP status=%i", + ctx->host, ctx->port, c->resp.status); + out_ret = FLB_RETRY; + } + else { + if (c->resp.payload) { + flb_plg_info(ctx->ins, "%s:%i, HTTP status=%i\n%s", + ctx->host, ctx->port, + c->resp.status, c->resp.payload); + } + else { + flb_plg_info(ctx->ins, "%s:%i, HTTP status=%i", + ctx->host, ctx->port, + c->resp.status); + } + } + } + else { + flb_plg_error(ctx->ins, "could not flush records to %s:%i (http_do=%i)", + ctx->host, ctx->port, ret); + out_ret = FLB_RETRY; + } + + flb_upstream_conn_release(u_conn); + flb_http_client_destroy(c); + flb_sds_destroy(out_buf); + FLB_OUTPUT_RETURN(out_ret); +} + +static int cb_slack_exit(void *data, struct flb_config *config) +{ + struct flb_slack *ctx; + + ctx = (struct flb_slack *) data; + if (!ctx) { + return 0; + } + + if (ctx->host) { + flb_sds_destroy(ctx->host); + } + if (ctx->uri) { + flb_sds_destroy(ctx->uri); + } + + if (ctx->u) { + flb_upstream_destroy(ctx->u); + } + + flb_free(ctx); + + return 0; +} + +/* Configuration properties map */ +static struct flb_config_map config_map[] = { + { + FLB_CONFIG_MAP_STR, "webhook", NULL, + 0, FLB_TRUE, offsetof(struct flb_slack, webhook), + NULL + }, + + /* EOF */ + {0} +}; + +struct flb_output_plugin out_slack_plugin = { + .name = "slack", + .description = "Send events to a Slack channel", + .cb_init = cb_slack_init, + .cb_flush = cb_slack_flush, + .cb_exit = cb_slack_exit, + .flags = FLB_OUTPUT_NET | FLB_IO_TLS, + .config_map = config_map +}; |