javascript - How to pass customHeaders as system arguments in PhantomJS script? -

i have started working in small proof of concept using phantomjs take screenshots , i'll necessary configurations system arguments such url, timeout, isscreenshotreqd, isharfilereqd, isheadersreqd, username, password , application related configs. working fine except customheaders.

code used

if (system.args.length === 1) {     console.log('usage: phantom.js <some url>');     phantom.exit(1); } else {     assembleid = system.args[2];     page.address = system.args[3];     page.settings.resourcetimeout = system.args[4];     isscreenshotreqd = system.args[5];     isheadersreqd = system.args[6];     isharfilereqd = system.args[7];     page.settings.username = system.args[8];     page.settings.password = system.args[9];     var key = "headerkey";//(or system.args[10])     var value = "headervalue";//(or system.args[11])     page.customheaders = {key : value};    //some operation } 

this sets customheader

"headers": [{"name": "key","value": "headervalue"}] 

you can see value set correctly key not taken initialized variable or system.args[x] instead takes whatever variable use.

though works if hardcode customheaders like

page.customheaders = {"headerkey": "headervalue"}; 

gives expected output problem i'll having dynamic headers various urls. means it's config driven , each customer give different headers each url.

javascript not permit use of variables object keys. have set variable key in way:

var key = "some dynamic key"; var value = "some value" var obj = {}; obj[key] = value; 

the additional problem phantomjs' customheaders needs set whole. phantomjs doesn't notice properties of customheaders object have changed. can use this:

var key = "headerkey"; var value = "headervalue"; var customheaders = {}; customheaders[key] = value; page.customheaders = customheaders;