Gomez Injection

[JRahm]

Problem this snippet solves:

The following iRule will utilize the Stream profile to auto-inject the required client side Gomez Networks performance measurement JavaScript code. The iRule performs two functions.

First of all, it will serve up the Gomez Javascript bootstrap code so you do not have to come up with a location to store this on one of your servers. In this example, the javascript is included inline in the script. As a consequence, a string substitution has to be made to replace all the braces at runtime. This overcomes a limitation with the BIG-IP command line import utility in it's handling of a large number of embedded braces. An alternate implementation could be to store this script in an external class file and load the contents with a TCL lindex command as seen in Automatic Sorry Page

How to use this snippet:

Steps to Install

• Gomez Account Id: You need to apply for a Gomez account and obtain your Gomez Application Id. This is typically a 6-character string. You'll need to replace the value of the GOMEZ_APP_ID variable with your correct application id.
• Virtual Server: Enable the default Stream filter profile on your Virtual Server. Also, ensure you have a valid HTTP profile configured.
• HTTP Profile: Set the value of "Response Chunking" in your HTTP Profile to "Rechunk".
• iRule: Save the iRule to your LTM and add it as a resource to your Virtual Server.

Code :

when HTTP_REQUEST {

  # -------------------------------------------------------------------------
  # TODO - Replace XXXXXX with your Gomez Account Application Id
  # -------------------------------------------------------------------------
  set GOMEZ_APP_ID "XXXXXX";

  set GOMEZ_DEBUG 0;
  set gws_luri [string tolower [HTTP::uri]]
  
  if { $gws_luri eq "/js/axftag.js" } {
    
    # -----------------------------------------------------------------------
    # Serve up Gomez bootstrap JavaScript
    # -----------------------------------------------------------------------
    HTTP::respond 200 content [string map {LBR \{ RBR \}} {/*Gomez tag version: 5.0*/var gomez=gomez?gomez:LBRRBR;gomez.h3=function(d, s)LBRfor(var p in s)LBRd[p]=s[p];RBRreturn d;RBR;gomez.h3(gomez,LBRb3:function(r)LBRif(r<=0)return false;return Math.random()<=r&&r;RBR,b0:function(n)LBRvar c=document.cookie;var v=c.match(new RegExp(';[ ]*'+n+'=([^;]*)'));if(!v)v=c.match(new RegExp(n+'=([^;]*)'));if(v)return unescape(v[1]);return '';RBR,c2:function(n,v,e,p,d,s)LBRtryLBRvar t=this,a=location.hostname;var c=n+'='+escape(v)+(e?';expires='+e.toGMTString():'')+(p?';path='+p:';path=/')+(d?';domain='+d:';domain='+a)+(s?';secure':'');document.cookie=c;RBRcatch(e)LBRRBRRBR,z0:function(n)LBRvar t=this;if(n)LBRvar s =t.b0("__g_c");if(!s)return '';var v=s.match(new RegExp(n+':([^\|]*)'));if(v)return unescape(v[1]);return '';RBRelse return '';RBR,z1:function(n,m)LBRvar t=this;if(n)LBRvar s=t.b0("__g_c");if(s)LBRif(s.indexOf(n+':')!=-1)s=s.replace(new RegExp('('+n+':[^\|]*)'),n+':'+m);else s=s==' '?n+':'+m:s+'|'+n+':'+m;t.c2("__g_c",s);RBRelse t.c2("__g_c",n+':'+m);RBR;RBRRBR);if(gomez.wrate)LBRgomez.i0=gomez.z0('w');if(gomez.i0)LBRgomez.runFlg=parseInt(gomez.i0)>0?true:false;RBRelse if(gomez.b3(parseFloat(gomez.wrate)))LBRgomez.runFlg=true;gomez.z1('w',1);RBRelseLBRgomez.runFlg=false;gomez.z1('w',0);RBRRBRelse if(gomez.wrate==undefined)LBRgomez.runFlg=true;gomez.z1('w',1);RBRelseLBRgomez.runFlg=false;gomez.z1('w',0);RBR;if(gomez.runFlg)LBRgomez.h1=function(v,d)LBRreturn v?v:dRBR;gomez.gs=gomez.h1(gomez.gs,new Date().getTime());gomez.acctId=gomez.h1(gomez.acctId,'');gomez.pgId=gomez.h1(gomez.pgId,'');gomez.grpId=gomez.h1(gomez.grpId, '');gomez.E=function(c)LBRthis.s=c;RBR;gomez.E.prototype=LBRg1:function(e)LBRvar t=gomez,i=t.g6(e);if(i)i.e=t.b5();RBRRBR;gomez.L=function(m)LBRthis.a=m;RBR;gomez.L.prototype=LBRg2:function(m)LBRvar t=gomez,n=t.b5();var s=document.getElementsByTagName(m);var e=t.k;if(m=='script')e=t.j;if(m=='iframe')e=t.l;if(s)LBRvar l=s.length;for(var i=0;i<\/scr"+"ipt>");else t.h5(s);RBR;t.b=t.z0('g');RBR,h7:function()LBRvar t=gomez,u=t.tloc?t.tloc:location.protocol+'//'+t.acctId+'.t.axf8.net/js/gtag5.js';if(t.gSfr)document.write("<\/scr"+"ipt>");else t.h5(u);RBR,n0:function(h)LBRvar t=gomez,f=new Date(t.gt()+946080000000),g=t.b0('__g_u');t.n1=h;t.z1('h',h);if(g&&g!='1'&&g.indexOf('NaN')==-1&&g.indexOf('undefined')==-1)LBRvar r=g.split('_');g=''+r[0]+'_'+r[1]+'_'+r[2]+'_'+r[3]+'_'+r[4]+'_'+r[5]+'_'+h;t.c2('__g_u',g,f);RBR;RBR,b1:function(v,s,q,f)LBRvar t=this;if(t._a)return;if(t.b3(v))LBRt._w=true;t.a=1;var p=parseFloat(s/v);if(t.b3(p))LBRt.x=true;t.a=3;RBR;RBR;t.d=true;t.z1('a',t.a);t.z1('e',v);t.z1('f',s);t.gc.i=v;t.gc.j=s;t.h4(v,s,q,f);if(t._w)LBRt.h7();t._a=true;RBR;RBR,b2:function(v,s)LBRvar t=this,f=new Date(t.gt()+946080000000),g=''+v+'_'+s;if(t._a)return;t.c2('__g_u',g,f);t.gc.c=v;t.gc.d=s;t.z1('c',v);t.z1('d',s);RBR,h4:function(o,p,q,d)LBRvar t=this,f=new Date(t.gt()+946080000000),g=t.b0('__g_u');if(g&&g!='1'&&g.indexOf('NaN')==-1&&g.indexOf('undefined')==-1)LBRvar r=g.split('_'),s;if(d)s=d;else if(q&&q>=0)s=new Date(t.gt()+parseInt(q*86400000)).getTime();elseLBRq=5;s=new Date(t.gt()+432000000).getTime();RBR;g=''+r[0]+'_'+r[1]+'_'+o+'_'+p+'_'+q+'_'+s;t.c2('__g_u',g,f);RBR;RBR,gt:function()LBRreturn new Date().getTime()RBR,b5:function()LBRreturn new Date().getTime()-gomez.gsRBR,b6:function()LBRvar t=gomez;t.p=t.b5();RBR,f8:function()LBRvar t=this;if(t.pollId1)clearInterval(t.pollId1);if(t.pollId2)clearInterval(t.pollId2);if(t.pollId3)clearInterval(t.pollId3);if(t.pollId4)clearInterval(t.pollId4);RBR,b7:function()LBRvar t =gomez;t.f8();t.q=t.b5();RBR,c7:function(u, s)LBRvar t=this;t.m=u;t.s=s;RBR,c8:function()LBRvar t=gomez,n=t.b5(),l=document.images.length;if(l>t._h)LBRfor(var i=t._h; i20) n=n.substring(0,20);var t=this,f=t.u;if(p==3)LBRf[f.length]=LBR'n':'a','a':n,'b':b,'e':p,'f':undefinedRBR;RBRelseLBRf[f.length]=LBR'n':'a','a':n,'b':t.b5(),'e':p,'f':bRBR;RBRRBR,customValue:function(n,v)LBRvar t=this;if(typeof(v)!='number')LBRreturn;RBRt.f6(n,3,v);RBR,d8:function(e)LBRif(gomez.gIE)return e.srcElement||LBRRBR;else return e.currentTarget||e.target||LBRRBR;RBR,e2:function(e,p,f,c)LBRvar n='on'+p;if(e.addEventListener)e.addEventListener(p,f,c);else if(e.attachEvent)e.attachEvent(n, f);elseLBRvar x=e[n];if(typeof e[n]!='function')e[n]=f;else e[n]=function(a)LBRx(a);f(a);RBR;RBRRBR,i1:function()LBRvar d =window.document, done=false,i2=function ()LBRif(!done)LBRdone=true;gomez.b6();gomez.a9();RBRRBR;(function ()LBRtryLBRd.documentElement.doScroll('left');RBRcatch(e)LBRsetTimeout(arguments.callee, 50);return;RBRi2();RBR)();d.onreadystatechange=function()LBRif(d.readyState=='complete')LBRd.onreadystatechange=null;i2();RBRRBR;RBR,g7:function()LBRtryLBRvar t=gomez;t.gc.a=t.acctId;/*@cc_on t.gIE=true;@*/if(t.gIE)LBRt.i1();window.attachEvent('onload', t.b7);RBRelse if(t.gSfr)LBRvar m=setInterval(function()LBRif(/loaded|complete/.test(document.readyState))LBRclearInterval(m);delete m;t.b6();t.b7();RBRRBR, 10);RBRelse if(window.addEventListener)LBRwindow.addEventListener('DOMContentLoaded', t.b6, false);window.addEventListener('load', t.b7, false);RBRelse return;t.c8();t.pollId1=setInterval(t.c8, 10);gomez.L.m['link'].g2('link');t.pollId3=setInterval("gomez.L.m['link'].g2('link')", 10);gomez.L.m['iframe'].g2('iframe');t.pollId4=setInterval("gomez.L.m['iframe'].g2('iframe')", 10);if(!t.gIE)t.a9();RBRcatch(e)LBRreturn;RBRRBRRBR);gomez.h2();gomez.g7();RBR}] "Content-Type" "application/x-javascript";

  } else {
    
    # ---------------------------------------------------------------------
    # Don't allow response data to be chunked
    # ---------------------------------------------------------------------
    if { [HTTP::version] eq "1.1" } {
      # -------------------------------------------------------------------
      # Force downgrade to HTTP 1.0, but still allow keep-alive connections.
      # Since HTTP 1.1 is keep-alive by default, and 1.0 isn't,
      # we need make sure the headers reflect the keep-alive status.
      # -------------------------------------------------------------------
      if { [HTTP::header is_keepalive] } {
        HTTP::header replace "Connection" "Keep-Alive";
      }
    }
  }
}

 when HTTP_RESPONSE {
   
  # -------------------------------------------------------------------------
  # Stream filter is disabled by default
  # -------------------------------------------------------------------------
  STREAM::disable;
   
  # -------------------------------------------------------------------------
  # Only process stream replacement for a valid response and content type is html.
  # -------------------------------------------------------------------------
  if { ([HTTP::header Content-Type] starts_with "text/html") && ([HTTP::status] == 200) } {
    
    set gomez_client [subst {