Add the ability to show or hide access logging with a command-line argument

Author: Matthew Byng-Maddick

README

@@ -96,6 +96,7 @@ Options are:
   -F, --pidfile=FILE              Specifies a file to write the process-id to.
   -h, --help                      Show this text.
   -i, --monitor-interval=TIME     Set the monitor interval (default: 5.00s).
+  -L, --access-log=MODE           Specify the mode of access logging (default: "ALL").
   -l, --logfile=[MODE:]FILE       Log all messages to logfile (default: stdout/stderr).
   -m, --max-frame-size=VALUE      Specify the maximum frame size (default: 16384 bytes).
   -n, --num-workers=VALUE         Specify the number of workers (default: 10).
@@ -119,6 +120,8 @@ for the mode, then line buffering is used when writing to the log file.
 The time delay/interval is specified in milliseconds by default, but can be
 in any other unit if the number is suffixed by a unit (us, ms, s, m, h, d).
 
+Access logging modes are 'NONE', 'ERROR', 'SUCCESS', 'ALL'.
+
 Copyright 2018-2020 HAProxy Technologies
 SPDX-License-Identifier: GPL-2.0-or-later
 --- help output -------

include/types/main.h

@@ -75,6 +75,7 @@ struct config_data {
 	int           pidfile_fd;
 	uint          ev_backend;
 #ifdef HAVE_LIBCURL
+	int           access_log_mode;
 	char         *mir_url;
 	const char   *mir_address;
 	int           mir_port[2];

src/curl.c

@@ -180,11 +180,12 @@ static void mir_curl_check_multi_info(struct curl_data *curl)
 			if ((rc = curl_easy_getinfo(msg->easy_handle, CURL_v075500(CURLINFO_SIZE_DOWNLOAD_T, CURLINFO_SIZE_DOWNLOAD), &size_download)) != CURLE_OK)
 				CURL_ERR_EASY("Failed to get number of downloaded bytes", rc);
 
-			w_log(NULL, "\"%s %s %s\" %ld " CURL_v075500("%ld/%ld", "%.0f/%.0f") " %.3f %s",
-			      con->mir->method, url, mir_curl_get_http_version(version),
-			      response_code, size_upload, size_download,
-			      CURL_v076100(total_time / 1000.0, total_time * 1000.0),
-			      (msg->data.result != CURLE_OK) ? con->error : "ok");
+			if (msg->data.result == CURLE_OK ? (cfg.access_log_mode & 1) : (cfg.access_log_mode & 2))
+				w_log(NULL, "\"%s %s %s\" %ld " CURL_v075500("%ld/%ld", "%.0f/%.0f") " %.3f %s",
+				      con->mir->method, url, mir_curl_get_http_version(version),
+				      response_code, size_upload, size_download,
+				      CURL_v076100(total_time / 1000.0, total_time * 1000.0),
+				      (msg->data.result != CURLE_OK) ? con->error : "ok");
 
 			CURL_DBG("Done: %s => (%d) %s", url, msg->data.result, con->error);
 

src/main.c

@@ -34,6 +34,9 @@ struct config_data cfg = {
 	.runtime_us          = DEFAULT_RUNTIME,
 	.pidfile_fd          = -1,
 	.ev_backend          = EVFLAG_AUTO,
+#ifdef LIBCURL
+	.access_log_mode     = 3,
+#endif
 };
 struct program_data prg;
 
@@ -71,6 +74,9 @@ static void usage(const char *program_name, bool_t flag_verbose)
 		(void)printf("  -F, --pidfile=FILE              Specifies a file to write the process-id to.\n");
 		(void)printf("  -h, --help                      Show this text.\n");
 		(void)printf("  -i, --monitor-interval=TIME     Set the monitor interval (default: %s).\n", str_delay(DEFAULT_MONITOR_INTERVAL));
+#ifdef HAVE_LIBCURL
+		(void)printf("  -L, --access-log=MODE           Specify the mode of access logging (default: \"ALL\").\n");
+#endif
 		(void)printf("  -l, --logfile=[MODE:]FILE       Log all messages to logfile (default: stdout/stderr).\n");
 		(void)printf("  -m, --max-frame-size=VALUE      Specify the maximum frame size (default: %d bytes).\n", DEFAULT_MAX_FRAME_SIZE);
 		(void)printf("  -n, --num-workers=VALUE         Specify the number of workers (default: %d).\n", DEFAULT_NUM_WORKERS);
@@ -91,6 +97,7 @@ static void usage(const char *program_name, bool_t flag_verbose)
 		(void)printf("for the mode, then line buffering is used when writing to the log file.\n\n");
 		(void)printf("The time delay/interval is specified in milliseconds by default, but can be\n");
 		(void)printf("in any other unit if the number is suffixed by a unit (us, ms, s, m, h, d).\n\n");
+		(void)printf("Access logging modes are 'NONE', 'ERROR', 'SUCCESS', 'ALL'.\n\n");
 		(void)printf("Copyright 2018-2020 HAProxy Technologies\n");
 		(void)printf("SPDX-License-Identifier: GPL-2.0-or-later\n\n");
 	} else {
@@ -326,6 +333,55 @@ static int getopt_set_ports(const char *ports, int *range)
 }
 
 
+/***
+ * NAME
+ *   getopt_set_access_log_mode -
+ *
+ * ARGUMENTS
+ *   mode_txt -
+ *   mode_val -
+ *
+ * DESCRIPTION
+ *   -
+ *
+ * RETURN VALUE
+ *   -
+ */
+static int getopt_set_access_log_mode(const char *mode_txt, int *mode_val)
+{
+	int retval = FUNC_RET_ERROR, mode=0;
+
+	DBG_FUNC(NULL, "\"%s\", %p", mode_txt, mode_val);
+
+	if (*mode_txt == 'A' || *mode_txt == 'a') {
+		mode = 3;
+		retval = FUNC_RET_OK;
+	}
+	else if (*mode_txt == 'E' || *mode_txt == 'e') {
+		mode = 2;
+		retval = FUNC_RET_OK;
+	}
+	else if (*mode_txt == 'S' || *mode_txt == 's') {
+		mode = 1;
+		retval = FUNC_RET_OK;
+	}
+	else if (*mode_txt == 'N' || *mode_txt == 'n') {
+		mode = 0;
+		retval = FUNC_RET_OK;
+	}
+	else
+		(void)fprintf(stderr, "ERROR: access log mode must be one of 'ALL', 'ERROR', 'SUCCESS', or 'NONE'\n");
+
+	/* If everything is fine, set the mode. */
+	if (_OK(retval)) {
+		*mode_val = mode;
+		W_DBG(NOTICE, NULL, "  mode set to %d", mode);
+	}
+
+        return retval;
+}
+
+
 /***
  * NAME
  *   main -
@@ -360,6 +416,7 @@ int main(int argc, char **argv, char **envp __maybe_unused)
 		{ "runtime",            required_argument, NULL, 'r' },
 		{ "processing-delay",   required_argument, NULL, 't' },
 #ifdef HAVE_LIBCURL
+		{ "access-log",         required_argument, NULL, 'L' },
 		{ "mirror-url",         required_argument, NULL, 'u' },
 		{ "mirror-interface",   required_argument, NULL, 'I' },
 		{ "mirror-local-port",  required_argument, NULL, 'P' },
@@ -422,6 +479,8 @@ int main(int argc, char **argv, char **envp __maybe_unused)
 		else if (c == 't')
 			flag_error |= _OK(getopt_set_time(optarg, &(cfg.processing_delay_us), 0, TIMEINT_S(1))) ? 0 : 1;
 #ifdef HAVE_LIBCURL
+		else if (c == 'L')
+			flag_error |= _OK(getopt_set_access_log_mode(optarg, &(cfg.access_log_mode))) ? 0 : 1;
 		else if (c == 'u')
 			mir_url = optarg;
 		else if (c == 'I')