check_http first lines

check_http

+#!/bin/bash
+# ================================================================================
+#
+# CHECK HTTP
+#
+#
+# -------------------------------------------------------------------------------
+# 2023-09-05  v0.1  <axel.hahn@unibe.ch>
+# ================================================================================
+
+. $( dirname $0 )/inc_pluginfunctions
+
+export self_APPVERSION=1.0
+
+# ----------------------------------------------------------------------
+# FUNCTIONS
+# ----------------------------------------------------------------------
+
+# show help text
+function showHelp(){
+    local _self; _self=$(basename $0)
+cat <<EOF
+$( ph.showImlHelpHeader )
+
+Makes an http request to chewck the response by
+- http status code
+- content in http response header
+- content in http response body
+
+SYNTAX:
+  $_self [-h] ...
+
+OPTIONS:
+
+  -h               this help
+
+PARAMETERS:
+
+  Define request:
+  -u URL           Set url to fetch
+  -m METHOD        Set a method, eg. HEAD; default: GET
+
+  What to check:
+  -s STATUSCODE    Statuscode to ceck
+  -r REGEX         String to check in http response header
+  -j JQ-FILTER     for JSON Response: filter data by a jq
+  -b REGEX         String to check in response body 
+
+  Output:
+  -l LABEL         set a custom label; default: METHOD + URL eg.
+                   "GET https://example.com/status"
+
+EXAMPLES:
+
+  $_self ...
+
+EOF
+}
+
+# ----------------------------------------------------------------------
+# MAIN
+# ----------------------------------------------------------------------
+
+ph.hasParamoption "h" "$@"; bOptHelp=$?
+
+if [ $bOptHelp -eq 0 -o $# -eq 0 ]; then
+    showHelp
+    exit 0
+fi
+
+ph.require "curl"
+
+sUrl=$(     ph.getValueWithParam ''    u "$@")
+sMethod=$(  ph.getValueWithParam 'GET' m "$@" | tr [:lower:] [:upper:])
+
+iStatus=$(  ph.getValueWithParam '200' s "$@")
+sHeader=$(  ph.getValueWithParam ''    r "$@")
+sBody=$(    ph.getValueWithParam ''    b "$@")
+sJq=$(      ph.getValueWithParam ''    j "$@")
+sLabel=$(   ph.getValueWithParam "$sMethod $sUrl"    l "$@")
+
+
+curlParams="-si"
+sProblems=
+sOK=
+
+if [ -z "$sUrl" ]; then
+    ph.setStatus unknown
+    ph.status "Wrong parameters - no url was given."
+    ph.exit
+fi
+ 
+# test -z "$sBody"  && curlParams+=" -I"
+
+
+out=$( curl $curlParams "$sUrl" )
+
+
+iHeaderEnd=$( echo "$out" | grep -n ^$'\r' | cut -f 1 -d ':')
+
+_header=$(echo "$out" | sed -n "1,${iHeaderEnd}p")
+_body=$(  echo "$out" | sed -n "${iHeaderEnd},\$p")
+
+if [ -n "$sJq" ]; then
+    _body=$( jq "$sJq" <<< "$_body" 2>/dev/null )
+fi
+
+# echo "HEADER"; echo "$_header"
+# echo "BODY"; echo "$_body"
+
+
+# --- test status
+if [ -n "$iStatus" ]; then
+    if ! grep -i "^HTTP/[0-9\.]* ${iStatus}" <<< "${_header}" >/dev/null; then
+        ph.setStatus critical
+        sProblems+="- Http status is not [${iStatus}];\n"
+    else
+        sOK+="- Http status is [${iStatus}];\n"
+    fi
+fi
+
+# --- search in http response header
+if [ -n "$sHeader" ]; then
+    if ! grep -iE "$sHeader" <<< "${_header}" >/dev/null; then
+        ph.setStatus critical
+        sProblems+="- Header does not contain [${sHeader}];\n"
+    else
+        sOK+="- [${sHeader}] was found in header;\n"
+    fi
+    
+fi
+
+# --- search in http response body
+if [ -n "$sBody" ]; then
+    if ! grep -iE "$sBody" <<< "${_body}" >/dev/null; then
+        ph.setStatus critical
+        sProblems+="- Body does not contain [${sBody}];\n"
+    else
+        sOK+="- [${sBody}] was found in body;\n"
+    fi
+    
+fi
+
+# --- output
+test -n "$sProblems" && sProblems="Problems:\n$sProblems\n"
+test -n "$sOK"       && sOK="Found:\n$sOK"
+
+ph.status "$sLabel"
+
+if [ "$sLabel" != "$sMethod $sUrl" ]; then
+    echo "$sMethod $sUrl"
+fi
+echo
+echo -e "${sProblems}${sOK}"
+
+echo "HEADER:"; echo; echo "$_header"
+echo -n "Eapsed time: "; ph.showtimer
+
+ph.exit
+
+# ----------------------------------------------------------------------