refactor(log): Use CLEF for JSON logs

Use Compact Log Event Format (CLEF) for JSON logs along with custom properties.

Folder.DotSettings

@@ -0,0 +1,4 @@
+<wpf:ResourceDictionary xml:space="preserve" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:ss="urn:shemas-jetbrains-com:settings-storage-xaml" xmlns:wpf="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=cfddns/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=mydomain/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/UserDictionary/Words/=myserver/@EntryIndexedValue">True</s:Boolean></wpf:ResourceDictionary>

cfddns.sh

@@ -35,18 +35,18 @@ badParam() {
   if [ "$1" = "null" ]; then
     printf "\n%sERROR: '%s' cannot have a NULL (empty) value.\n" "$err" "$2"
     printf "%sPlease use '--help' for assistance.%s\n\n" "$cyan" "$norm"
-    ([ "$logToConsole" -eq 0 ]) && writePlainTextLog \
+    ([ "$logToConsole" -eq 0 ]) && writeLog \
       "${2} cannot have a NULL (empty) value" "critical" "fail" "preexec" 1
     exit 1
   elif [ "$1" = "dne" ]; then
     printf "\n%sERROR: '%s %s'\n" "$err" "$2" "$3"
     printf "file or directory does not exist or is empty.%s\n\n" "$norm"
-    ([ "$logToConsole" -eq 0 ]) && writePlainTextLog \
+    ([ "$logToConsole" -eq 0 ]) && writeLog \
       "${3}: file or directory does not exist or is empty" "critical" "fail" "preexec" 1
     exit 1
   elif [ "$1" = "errMsg" ]; then
     printf "\n%sERROR: %s%s\n\n" "$err" "$2" "$norm"
-    ([ "$logToConsole" -eq 0 ]) && writePlainTextLog \
+    ([ "$logToConsole" -eq 0 ]) && writeLog \
       "${2%%\Exit*}" "fatal" "fail" "preexec" 1
     exit 1
   fi
@@ -85,7 +85,7 @@ listCFErrors() {
     messages="${messages#*_}"
 
     # output to log
-    writePlainTextLog "${message}" "err" "fail" "$2" "$code"
+    writeLog "${message}" "err" "fail" "$2:CF-ERR" "$code"
   done
 }
 
@@ -113,6 +113,31 @@ standardizeLogLevels() {
   esac
 }
 
+# $1: message, $2: level, $3: status, [$4: operation], [$5: code]
+writeJsonLog() {
+  # not enough information to generate a meaningful log message
+  if [ -z "$1" ] || [ $# -lt 3 ]; then
+    return
+  fi
+
+  JSON_PROPS="$(
+    jq --null-input -c \
+      --arg timestamp "$(getTimeStamp)" \
+      --arg hostname "$(getHostname)" \
+      --arg pName "$LOG_PROGRAM_NAME" \
+      --arg pid "$$" \
+      --arg level "$(standardizeLogLevels "$2")" \
+      --arg status "$(uppercase "$3")" \
+      --arg message "$1" \
+      --arg operation "${4:-UNSPECIFIED}" \
+      --arg code "${5:-0}" \
+      '{"@t":$timestamp, "@m":$message, "@l":$level, "hostname":$hostname, "programName":$pName, "pid":$pid, "status":$status, "operation":$operation, "code":$code}' \
+  )"
+
+  printf "%s\n" "$JSON_PROPS" >>"$logFile"
+  return
+}
+
 # modified syslog fmt: <ISO-8601 timestamp> <hostname> <tag>[pid]: [LEVEL:$2] [STATUS:$3] <MESSAGE:$1> (<OPERATION:$4>:<CODE:$5>)
 writePlainTextLog() {
   # not enough information to generate a meaningful log message
@@ -120,16 +145,23 @@ writePlainTextLog() {
     return
   fi
 
-  PT_LOG_LEVEL="$(standardizeLogLevels "$2")"
-
-  ([ "$logDebug" -eq 0 ] && [ "$PT_LOG_LEVEL" = "DEBUG" ]) && return
-
   printf "%s %s %s[%s]: [%s] [%s] %s (%s:%s)\n" \
     "$(getTimeStamp)" "$(getHostname)" "$LOG_PROGRAM_NAME" "$$" \
-    "$PT_LOG_LEVEL" "$(uppercase "$3")" "$1" "${4:-UNSPECIFIED}" "${5:-0}" \
+    "$(standardizeLogLevels "$2")" "$(uppercase "$3")" "$1" "${4:-UNSPECIFIED}" "${5:-0}" \
     >>"$logFile"
 }
 
+writeLog() {
+  ([ "$logToNone" -eq 1 ]) && return
+
+  PT_LOG_LEVEL="$(standardizeLogLevels "$2")"
+  ([ "$logDebug" -eq 0 ] && [ "$PT_LOG_LEVEL" = "DEBUG" ]) && return
+
+  ([ "$logToJournal" -eq 1 ]) && return # TODO: replace this with function when implemented
+  ([ "$useJsonLogFmt" -eq 1 ]) && writeJsonLog "$@"
+  ([ "$useSyslogLogFmt" -eq 1 ]) && writePlainTextLog "$@"
+}
+
 scriptExamples() {
   newline
   printf "Update Cloudflare DNS host A/AAAA records with current IP address.\n"
@@ -241,23 +273,24 @@ textBlockSwitches() {
 }
 
 ### default variable values
+LOG_PROGRAM_NAME="CFDDNS"
 scriptPath="$(CDPATH='' \cd -- "$(dirname -- "$0")" && pwd -P)"
 scriptName="$(basename "$0")"
 logFile="$scriptPath/${scriptName%.*}.log"
 logToJournal=0
 logToConsole=0
+logToNone=0
 logDebug=0
 useJsonLogFmt=1
 useSyslogLogFmt=0
 accountFile="$scriptPath/cloudflare.credentials"
-colourizeLogFile=1
 dnsRecords=""
 dnsSeparator=","
 ipAddress=""
 ip4=1
 ip6=0
-ip4DetectionSvc="http://ipv4.icanhazip.com"
-ip6DetectionSvc="http://ipv6.icanhazip.com"
+ip4DetectionSvc="https://ipv4.icanhazip.com"
+ip6DetectionSvc="https://ipv6.icanhazip.com"
 invalidDomainCount=0
 failedHostCount=0
 
@@ -296,6 +329,7 @@ while [ $# -gt 0 ]; do
   --log-none)
   # do not log anything
     logFile="/dev/null"
+    logToNone=1
     ;;
   --log-debug)
   # log debugging messages
@@ -355,7 +389,7 @@ while [ $# -gt 0 ]; do
   *)
     printf "\n%sUnknown option: %s\n" "$err" "$1"
     printf "%sUse '--help' for valid options.%s\n\n" "$cyan" "$norm"
-    ([ "$logToConsole" -eq 0 ]) && writePlainTextLog \
+    ([ "$logToConsole" -eq 0 ]) && writeLog \
       "Unknown script parameter: '${1}'" "critical" "fail" "preexec" 1
     exit 1
     ;;
@@ -366,12 +400,12 @@ done
 ### pre-flight checks
 if ! command -v curl >/dev/null; then
   printf "\n%sThis script requires that 'curl' is installed and accessible. Exiting.%s\n\n" "$err" "$norm"
-  ([ "$logToConsole" -eq 0 ]) && writePlainTextLog "'curl' must be installed and accessible" "fatal" "fail" "preexec" 2
+  ([ "$logToConsole" -eq 0 ]) && writeLog "'curl' must be installed and accessible" "fatal" "fail" "preexec" 2
   exit 2
 fi
 if ! command -v jq >/dev/null; then
   printf "\n%sThis script requires that 'jq' is installed and accessible. Exiting.%s\n\n" "$err" "$norm"
-  ([ "$logToConsole" -eq 0 ]) && writePlainTextLog "'jq' must be installed and accessible" "fatal" "fail" "preexec" 2
+  ([ "$logToConsole" -eq 0 ]) && writeLog "'jq' must be installed and accessible" "fatal" "fail" "preexec" 2
   exit 2
 fi
 if [ -z "$dnsRecords" ]; then
@@ -385,27 +419,16 @@ if [ "$logToJournal" -eq 1 ] && ! command -v logger >/dev/null 2>&1; then
   printf "\n%sThis script requires that 'logger' is installed to write journald entries. Exiting.%s\n\n" "$err" "$norm"
   exit 2
 fi
-# turn off log file colourization if parameter is set
-if [ "$colourizeLogFile" -eq 0 ]; then
-  bold=""
-  cyan=""
-  err=""
-  magenta=""
-  norm=""
-  ok=""
-  warn=""
-  yellow=""
-fi
 
 ### initial log entries
-writePlainTextLog "starting '${scriptName}'" "info" "ok" "script"
-writePlainTextLog "script path: ${scriptPath}/${scriptName}" "debug" "ok" "startup"
-writePlainTextLog "credentials file: ${accountFile}" "debug" "ok" "startup"
+writeLog "starting '${scriptName}'" "info" "ok" "script"
+writeLog "script path: ${scriptPath}/${scriptName}" "debug" "ok" "startup"
+writeLog "credentials file: ${accountFile}" "debug" "ok" "startup"
 
 if [ "$ip4" -eq 1 ]; then
-  writePlainTextLog "mode: IPv4" "debug" "ok" "startup"
+  writeLog "mode: IPv4" "debug" "ok" "startup"
 elif [ "$ip6" -eq 1 ]; then
-  writePlainTextLog "mode: IPv6" "debug" "ok" "startup"
+  writeLog "mode: IPv6" "debug" "ok" "startup"
 fi
 
 # detect and report IP address
@@ -413,21 +436,21 @@ if [ -z "$ipAddress" ]; then
   # detect public ip address
   if [ "$ip4" -eq 1 ]; then
     if ! ipAddress="$(curl -s $ip4DetectionSvc)"; then
-      writePlainTextLog \
+      writeLog \
         "Unable to auto-detect this machine's public IP address; try again later or supply the IP address to be used" "err" "fail" "detectip" 10
       exit 10
     fi
   fi
   if [ "$ip6" -eq 1 ]; then
     if ! ipAddress="$(curl -s $ip6DetectionSvc)"; then
-      writePlainTextLog \
+      writeLog \
         "Unable to auto-detect this machine's public IP address; try again later or supply the IP address to be used" "err" "fail" "detectip" 10
       exit 10
     fi
   fi
-  writePlainTextLog "DDNS IP address (detected): $ipAddress" "info" "ok" "startup"
+  writeLog "DDNS IP address (detected): $ipAddress" "info" "ok" "startup"
 else
-  writePlainTextLog "DDNS IP address (supplied): $ipAddress" "info" "ok" "startup"
+  writeLog "DDNS IP address (supplied): $ipAddress" "info" "ok" "startup"
 fi
 
 # iterate DNS records to update
@@ -439,7 +462,7 @@ while [ -n "$dnsRecordsToUpdate" ] && [ "$dnsRecordsToUpdate" != "$dnsSeparator"
   if [ -z "$record" ]; then
     continue
   fi
-  writePlainTextLog "DNS host record '${record}' queued for update" "info" "ok" "startup"
+  writeLog "DNS host record '${record}' queued for update" "info" "ok" "startup"
 done
 
 ### read Cloudflare credentials
@@ -456,14 +479,14 @@ case "$accountFile" in
   ;;
 esac
 if [ -z "$cfKey" ]; then
-  writePlainTextLog "Cloudflare authorized API key (cfKey) is either null or undefined; please check your Cloudflare credentials file" "err" "fail" "creds" 21
+  writeLog "Cloudflare authorized API key (cfKey) is either null or undefined; please check your Cloudflare credentials file" "err" "fail" "creds" 21
   exit 21
 fi
 if [ -z "$cfZoneId" ]; then
-  writePlainTextLog "Cloudflare zone id (cfZoneId) is either null or undefined; please check your Cloudflare credentials file" "err" "fail" "creds" 22
+  writeLog "Cloudflare zone id (cfZoneId) is either null or undefined; please check your Cloudflare credentials file" "err" "fail" "creds" 22
   exit 22
 fi
-writePlainTextLog "Cloudflare credentials file read successfully" "debug" "ok" "creds"
+writeLog "Cloudflare credentials file read successfully" "debug" "ok" "creds"
 
 ### connect to Cloudflare and do what needs to be done!
 dnsRecordsToUpdate="$dnsRecords$dnsSeparator"
@@ -488,7 +511,7 @@ while [ -n "$dnsRecordsToUpdate" ] && [ "$dnsRecordsToUpdate" != "$dnsSeparator"
       -H "Authorization: Bearer ${cfKey}" \
       -H "Content-Type: application/json"
   )"; then
-    writePlainTextLog "Unable to connect to Cloudflare servers; please try again later." "err" "fail" "cflogin" 3
+    writeLog "Unable to connect to Cloudflare servers; please try again later." "err" "fail" "cflogin" 3
     exit 3
   fi
 
@@ -497,7 +520,7 @@ while [ -n "$dnsRecordsToUpdate" ] && [ "$dnsRecordsToUpdate" != "$dnsSeparator"
   cfSuccess="$(printf "%s" "$cfLookup" | jq -r '.success')"
   if [ "$cfSuccess" = "false" ]; then
     listCFErrors "$cfLookup" "cflogin"
-    writePlainTextLog "Cloudflare API error; review any previously logged 'CF-ERR:' lines for details." "err" "fail" "cflogin" 25
+    writeLog "Cloudflare API error; review any previously logged 'CF-ERR:' lines for details." "err" "fail" "cflogin" 25
     exit 25
   fi
 
@@ -505,18 +528,18 @@ while [ -n "$dnsRecordsToUpdate" ] && [ "$dnsRecordsToUpdate" != "$dnsSeparator"
 
   # skip to the next host if an existing host record cannot be found (this script *updates* only, does not create!)
   if [ "$resultCount" = "0" ]; then
-    writePlainTextLog "Cannot find an existing record matching '${record}' to update" "warn" "warn" "ddns"
+    writeLog "Cannot find an existing record matching '${record}' to update" "warn" "warn" "ddns"
     invalidDomainCount=$((invalidDomainCount + 1))
     continue
   fi
 
   objectId=$(printf "%s" "$cfLookup" | jq -r '.result | .[] | .id')
   currentIpAddr=$(printf "%s" "$cfLookup" | jq -r '.result | .[] | .content')
-  writePlainTextLog "The current IP address for '${record}' is ${currentIpAddr}" "debug" "ok" "ddns"
+  writeLog "The current IP address for '${record}' is ${currentIpAddr}" "debug" "ok" "ddns"
 
   # skip to next hostname if record already up to date
   if [ "$currentIpAddr" = "$ipAddress" ]; then
-    writePlainTextLog "The IP address for '${record}' is already up to date" "info" "ok" "ddns"
+    writeLog "The IP address for '${record}' is already up to date" "info" "ok" "ddns"
     continue
   fi
 
@@ -530,17 +553,17 @@ while [ -n "$dnsRecordsToUpdate" ] && [ "$dnsRecordsToUpdate" != "$dnsSeparator"
       -H "Content-Type: application/json" \
       --data "${updateJSON}"
   )"; then
-    writePlainTextLog "Unable to connect to Cloudflare servers; please try again later." "err" "fail" "ddns" 3
+    writeLog "Unable to connect to Cloudflare servers; please try again later." "err" "fail" "ddns" 3
     exit 3
   fi
 
   # note update success or failure
   cfSuccess="$(printf "%s" "$cfResult" | jq '.success')"
   if [ "$cfSuccess" = "true" ]; then
-    writePlainTextLog "The IP address for '${record}' successfully updated" "info" "ok" "ddns"
+    writeLog "The IP address for '${record}' successfully updated" "info" "ok" "ddns"
   else
     listCFErrors "$cfResult" "ddns"
-    writePlainTextLog "Unable to update the IP address for '${record}'" "err" "fail" "ddns"
+    writeLog "Unable to update the IP address for '${record}'" "err" "fail" "ddns"
     # do not exit with error, API error here is probably an update issue specific to this host
     # increment counter and note it after all processing finished
     failedHostCount=$((failedHostCount + 1))
@@ -549,14 +572,14 @@ done
 
 # exit
 if [ "$invalidDomainCount" -ne 0 ]; then
-  writePlainTextLog "${invalidDomainCount} invalid host(s) were supplied for updating" "warn" "warn" "ddns"
+  writeLog "${invalidDomainCount} invalid host(s) were supplied for updating" "warn" "warn" "ddns"
 fi
 if [ "$failedHostCount" -ne 0 ]; then
-  writePlainTextLog \
+  writeLog \
     "${failedHostCount} host update(s) failed; review 'CF-ERR:' lines in this log to help determine what may have gone wrong" "err" "fail" "ddns" 26
   exit 26
 else
-  writePlainTextLog "${scriptName} completed successfully" "info" "ok" "script"
+  writeLog "${scriptName} completed successfully" "info" "ok" "script"
 fi
 
 ### exit return codes