Fixing error on update echo and adding httpGet Support

stocks/stocks

@@ -2,13 +2,32 @@
 # Author: Alexander Epstein https://github.com/alexanderepstein
 
 currentVersion="1.2.1"
+configuredClient=""
 
-checkCurl()
+## 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
-   echo "Error: this tool requires 'curl', please install it."
-   return 1
- fi
+    if  command -v curl &>/dev/null ; then
+      configuredClient="curl"
+    elif command -v wget &>/dev/null ; then
+      configuredClient="wget"
+    elif command -v fetch &>/dev/null ; then
+      configuredClient="fetch"
+    else
+      echo "Error: This tool reqires either curl, wget, or fetch to be installed."
+      return 1
+    fi
+
+}
+
+## Allows to call the users configured client without if statements everywhere
+httpGet()
+{
+  case "$configuredClient" in
+    curl) curl -A curl -s "$@";;
+    wget) wget -qO- "$@";;
+    fetch) fetch -o "...";;
+  esac
 }
 
 checkInternet()
@@ -26,7 +45,7 @@ checkInternet()
 ## JSON response to extrapolate the information for storage
 getStockInformation()
 {
-  stockInfo=$(curl -Acurl -s  "https://www.alphavantage.co/query?function=GLOBAL_QUOTE&symbol=$1&apikey=KPCCCRJVMOGN9L6T") > /dev/null #grab the JSON response
+  stockInfo=$(httpGet  "https://www.alphavantage.co/query?function=GLOBAL_QUOTE&symbol=$1&apikey=KPCCCRJVMOGN9L6T") > /dev/null #grab the JSON response
   export PYTHONIOENCODING=utf8 #necessary for python in some cases
   echo $stockInfo | python -c "import sys, json; print json.load(sys.stdin)['Realtime Global Securities Quote']['02. Exchange Name']" > /dev/null 2>&1 || { echo "Not a valid stock symbol" ; exit 1; } #checking if we get any information back from the server if not chances are it isnt a valid stock symbol
   # The rest of the code is just extrapolating the data with python from the JSON response
@@ -69,7 +88,7 @@ printStockInformation()
 ## and it will determine the stock symbol for apple is AAPL and move on from there
 getTicker()
 {
-  response=$(curl -Acurl -s "http://d.yimg.com/autoc.finance.yahoo.com/autoc?query=$1+$2+$3+$4+$5+$6+$7+$8+$9&region=1&lang=en%22") > /dev/null
+  response=$(httpGet "http://d.yimg.com/autoc.finance.yahoo.com/autoc?query=$1+$2+$3+$4+$5+$6+$7+$8+$9&region=1&lang=en%22") > /dev/null
   symbol=$(echo $response | python -c "import sys, json; print json.load(sys.stdin)['ResultSet']['Result'][0]['symbol']") # using python to extrapolate the stock symbol
   unset response #just unsets the entire response after using it since all I need is the stock ticker
 }
@@ -82,7 +101,7 @@ update()
   repositoryName="Bash-Snippets" #Name of repostiory to be updated ex. Sandman-Lite
   githubUserName="alexanderepstein" #username that hosts the repostiory ex. alexanderepstein
   nameOfInstallFile="install.sh" # change this if the installer file has a different name be sure to include file extension if there is one
-  latestVersion=$(curl -Acurl -s 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
+  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
@@ -102,7 +121,7 @@ update()
         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" || { echo "Permissions Error: try running the update as sudo"; exit 1; }
+        ./$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
@@ -124,7 +143,7 @@ usage()
   echo "  -v Get the tool version"
 }
 
-checkCurl || exit 1
+getConfiguredClient || exit 1
 checkInternet || exit 1 # check if we have a valid internet connection if this isnt true the rest of the script will not work so stop here