Added asn component.

asn/asn

@@ -0,0 +1,203 @@
+#!/usr/bin/env bash
+# Author: IP2Location https://github.com/ip2location
+currentVersion="1.23.0"
+configuredClient=""
+
+## This function determines which http get tool the system has installed and returns an error if there isnt one
+getConfiguredClient()
+{
+  if  command -v curl &>/dev/null; then
+    configuredClient="curl"
+  elif command -v wget &>/dev/null; then
+    configuredClient="wget"
+  elif command -v http &>/dev/null; then
+    configuredClient="httpie"
+  elif command -v fetch &>/dev/null; then
+    configuredClient="fetch"
+  else
+    echo "Error: This tool requires either curl, wget, httpie or fetch to be installed." >&2
+    return 1
+  fi
+}
+
+# The python and JSON functions can be deleted if the script does not need them
+
+## This function determines which version of python is installed on the machine
+getConfiguredPython()
+{
+  if command -v python3 &>/dev/null; then
+    configuredPython="python3"
+  elif  command -v python2 &>/dev/null; then
+    configuredPython="python2"
+  elif command -v python &>/dev/null; then
+    configuredPython="python"
+  else
+    echo "Error: This tool requires python to be installed."
+    return 1
+  fi
+}
+
+## Don't alter the python call if it's coming from a Mac
+if [[ $(uname) != "Darwin" ]]; then
+  python()
+  {
+    case "$configuredPython" in
+      python3) python3 "$@" ;;
+      python2) python2 "$@" ;;
+      python)  python "$@" ;;
+    esac
+  }
+fi
+
+## Grabs an element from a a json string and then echoes it to stdout
+## $1 = the JSON string
+## $n+1 = the elements to be indexed
+AccessJsonElement() {
+  json="$1"
+  shift
+  accessor=""
+  for element in "$@"; do
+      accessor="${accessor}['$element']"
+  done
+  echo "$json" | python -c "from __future__ import print_function; import sys, json; print(json.load(sys.stdin)${accessor})"
+  return "$?"
+}
+
+## Allows to call the users configured client without if statements everywhere
+httpGet()
+{
+  case "$configuredClient" in
+    curl)  curl -A curl -s "$@" ;;
+    wget)  wget -qO- "$@" ;;
+    httpie) http -b GET "$@" ;;
+    fetch) fetch -q "$@" ;;
+  esac
+}
+
+update()
+{
+  # Author: Alexander Epstein https://github.com/alexanderepstein
+  # Update utility version 1.2.0
+  # To test the tool enter in the default values that are in the examples for each variable
+  repositoryName="Bash-Snippets" #Name of repostiory to be updated ex. Sandman-Lite
+  githubUserName="alexanderepstein" #username that hosts the repostiory ex. alexanderepstein
+  nameOfInstallFile="install.sh" # change this if the installer file has a different name be sure to include file extension if there is one
+  latestVersion=$(httpGet https://api.github.com/repos/$githubUserName/$repositoryName/tags | grep -Eo '"name":.*?[^\\]",'| head -1 | grep -Eo "[0-9.]+" ) #always grabs the tag without the v option
+
+  if [[ $currentVersion == "" || $repositoryName == "" || $githubUserName == "" || $nameOfInstallFile == "" ]]; then
+    echo "Error: update utility has not been configured correctly." >&2
+    exit 1
+  elif [[ $latestVersion == "" ]]; then
+    echo "Error: no active internet connection" >&2
+    exit 1
+  else
+    if [[ "$latestVersion" != "$currentVersion" ]]; then
+      echo "Version $latestVersion available"
+      echo -n "Do you wish to update $repositoryName [Y/n]: "
+      read -r answer
+      if [[ "$answer" == [Yy] ]]; then
+        cd ~ || { echo 'Update Failed'; exit 1; }
+        if [[ -d  ~/$repositoryName ]]; then rm -r -f $repositoryName || { echo "Permissions Error: try running the update as sudo"; exit 1; } ; fi
+        git clone "https://github.com/$githubUserName/$repositoryName" || { echo "Couldn't download latest version"; exit 1; }
+        cd $repositoryName || { echo 'Update Failed'; exit 1; }
+        git checkout "v$latestVersion" 2> /dev/null || git checkout "$latestVersion" 2> /dev/null || echo "Couldn't git checkout to stable release, updating to latest commit."
+        chmod a+x install.sh #this might be necessary in your case but wasnt in mine.
+        ./$nameOfInstallFile "update" || exit 1
+        cd ..
+        rm -r -f $repositoryName || { echo "Permissions Error: update succesfull but cannot delete temp files located at ~/$repositoryName delete this directory with sudo"; exit 1; }
+      else
+        exit 1
+      fi
+    else
+      echo "$repositoryName is already the latest version"
+    fi
+  fi
+}
+
+checkInternet()
+{
+  httpGet github.com > /dev/null 2>&1 || { echo "Error: no active internet connection" >&2; return 1; } # query github with a get request
+}
+
+usage()
+{
+  cat <<EOF
+asn
+Description: A simple tool to return the ASN data of an IP address along with it's corresponding geolocation data. This tool is using IP2Location.io API which provided 500 queries per day for keyless query, or 30000 queries per month if you sign up the free plan.
+Usage: asn [flags]
+  -g  Lookup an IP address for it's ASN data plus geolocation information
+  -i  Set the IP address to be lookup for
+  -k  Set the IP2Location.io API key (Optional)
+  -u  Update Bash-Snippet Tools
+  -h  Show the help
+  -v  Get the tool version
+Examples:
+   asn -g
+   asn -i 8.8.8.8 -g
+   asn -k <YOUR_IP2LOCATIONIO_APIKEY> -g
+   asn -i 8.8.8.8 -k <YOUR_IP2LOCATIONIO_APIKEY> -g
+EOF
+}
+
+
+getasn() {
+  if [ -n "${IP}" ]; then
+    echo "Querying for ${IP} now..."
+    if [ -n "${APIKEY}" ]; then
+      httpGet "https://api.ip2location.io/?key=${APIKEY}&ip=${IP}"
+    else
+      httpGet "https://api.ip2location.io/?ip=${IP}"
+    fi
+  else
+    echo "Querying for server IP now..."
+    if [ -n "${APIKEY}" ]; then
+      httpGet "https://api.ip2location.io/?key=${APIKEY}"
+    else
+      httpGet "https://api.ip2location.io/"
+    fi
+  fi
+}
+
+test1() {
+  if [ -n "${IP}" ]; then
+    echo "Querying for ${IP} now..."
+  else
+    echo "Querying for server IP now..."
+  fi
+}
+
+while getopts "gti:k:hvu" opt; do
+  case "$opt" in
+    h)  usage
+        exit 0
+        ;;
+    g) getConfiguredClient && checkInternet && getasn || exit 1 ;;
+    i) IP=$OPTARG ;;
+    k) APIKEY=$OPTARG ;;
+    t) test1 || exit 1 ;;
+    v)  echo "Version $currentVersion"
+        exit 0
+        ;;
+    u)  getConfiguredClient || exit 1
+        checkInternet || exit 1
+        update
+        exit 0
+        ;;
+  esac
+done
+
+# special set of first arguments that have a specific behavior across tools
+if [[ $# == "0" ]]; then
+  usage ## if calling the tool with no flags and args chances are you want to return usage
+  exit 0
+elif [[ $# == "1" ]]; then
+  if [[ $1 == "update" ]]; then
+    getConfiguredClient || exit 1
+    checkInternet || exit 1
+    update || exit 1
+    exit 0
+  elif [[ $1 == "help" ]]; then
+    usage
+    exit 0
+  fi
+fi