FS-8692 Added functionality to mod_amqp command listener to be able to send the api response back as an event to an exchange defined in the api message headers

src/mod/event_handlers/mod_amqp/mod_amqp_command.c

@@ -178,6 +178,60 @@ switch_status_t mod_amqp_command_create(char *name, switch_xml_t cfg)
 	return SWITCH_STATUS_GENERR;
 }
 
+static void mod_amqp_command_response(mod_amqp_command_profile_t *profile, char *command, switch_stream_handle_t stream,
+									  char *fs_resp_exchange, char *fs_resp_key, switch_status_t status)
+{
+	char *json_output = NULL;
+	amqp_basic_properties_t props;
+	cJSON *message = NULL;
+
+	if (! profile->conn_active) {
+		/* No connection, so we can not send the message. */
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Profile[%s] not active\n", profile->name);
+		return;
+	}
+
+	/* Construct the api response */
+	switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Preparing api command response: [%s]\n", (char *)stream.data);
+	message = cJSON_CreateObject();
+
+	cJSON_AddItemToObject(message, "output", cJSON_CreateString((const char *) stream.data));
+	cJSON_AddItemToObject(message, "command", cJSON_CreateString(command));
+	cJSON_AddItemToObject(message, "status", cJSON_CreateNumber((double) status));
+
+	json_output = cJSON_Print(message);
+	cJSON_Delete(message);
+
+	memset(&props, 0, sizeof(amqp_basic_properties_t));
+
+	props._flags = AMQP_BASIC_CONTENT_TYPE_FLAG;
+	props.content_type = amqp_cstring_bytes("text/json");
+
+	status = amqp_basic_publish(
+								profile->conn_active->state,
+								1,
+								amqp_cstring_bytes(fs_resp_exchange),
+								amqp_cstring_bytes(fs_resp_key),
+								0,
+								0,
+								&props,
+								amqp_cstring_bytes(json_output));
+
+	switch_safe_free(json_output);
+
+	if (status < 0) {
+		const char *errstr = amqp_error_string2(-status);
+		switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_CRIT, "Profile[%s] failed to send event on connection[%s]: %s\n",
+						  profile->name, profile->conn_active->name, errstr);
+
+		/* This is bad, we couldn't send the message. Clear up any connection */
+		mod_amqp_connection_close(profile->conn_active);
+		profile->conn_active = NULL;
+		return;
+	}
+
+	return;
+}
 
 void * SWITCH_THREAD_FUNC mod_amqp_command_thread(switch_thread_t *thread, void *data)
 {
@@ -286,6 +340,7 @@ void * SWITCH_THREAD_FUNC mod_amqp_command_thread(switch_thread_t *thread, void
 				COMMAND_FORMAT_UNKNOWN,
 				COMMAND_FORMAT_PLAINTEXT
 			} commandFormat = COMMAND_FORMAT_PLAINTEXT;
+			char *fs_resp_exchange = NULL, *fs_resp_key = NULL;
 
 			amqp_maybe_release_buffers(profile->conn_active->state);
 
@@ -342,6 +397,24 @@ void * SWITCH_THREAD_FUNC mod_amqp_command_thread(switch_thread_t *thread, void
 				}
 			}
 
+			if (envelope.message.properties.headers.num_entries) {
+				int x = 0;
+
+				for ( x = 0; x < envelope.message.properties.headers.num_entries; x++) {
+					char *header_key = (char *)envelope.message.properties.headers.entries[x].key.bytes;
+					char *header_value = (char *)envelope.message.properties.headers.entries[x].value.value.bytes.bytes;
+					switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "AMQP message custom header key[%s] value[%s]\n", header_key, header_value);
+
+					if ( !strncmp(header_key, "x-fs-api-resp-exchange", 22)) {
+						fs_resp_exchange = header_value;
+					} else if (!strncmp(header_key, "x-fs-api-resp-key", 17)) {
+						fs_resp_key = header_value;
+					} else {
+						switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Ignoring unrecognized event header [%s]\n", header_key);
+					}
+				}
+			}
+
 			if (commandFormat == COMMAND_FORMAT_PLAINTEXT) {
 				switch_stream_handle_t stream = { 0 }; /* Collects the command output */
 
@@ -353,10 +426,15 @@ void * SWITCH_THREAD_FUNC mod_amqp_command_thread(switch_thread_t *thread, void
 
 				SWITCH_STANDARD_STREAM(stream);
 
-				if (switch_console_execute(command, 0, &stream) != SWITCH_STATUS_SUCCESS) {
+				if ( fs_resp_exchange && fs_resp_key ) {
-					switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Remote command failed:\n%s\n", (char *) stream.data);
+					switch_status_t status = switch_console_execute(command, 0, &stream);
+					mod_amqp_command_response(profile, command, stream, fs_resp_exchange, fs_resp_key, status);
 				} else {
-					switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Remote command succeeded:\n%s\n", (char *) stream.data);
+					if (switch_console_execute(command, 0, &stream) != SWITCH_STATUS_SUCCESS) {
+						switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_WARNING, "Remote command failed:\n%s\n", (char *) stream.data);
+					} else {
+						switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Remote command succeeded:\n%s\n", (char *) stream.data);
+					}
 				}
 				switch_safe_free(stream.data);
 			}