javascript - Chrome WebRequest - Add chrome event listener once -


problem

  • i'm trying pass headers chrome extension running in tab. @ moment current code, adds 1 event each time page refreshed means if refresh on same page 5 times, end event triggered 5 times on each page load.

restrictions

  • i have run tab using background script allow user exclude sites runs on.
  • in order specific headers want, have listen using background extension because, attempts re-request resource cors , have access reduced set of headers.

code

chrome.tabs.onupdated.addlistener(function(tabid, changeinfo, tab) {     // prevent double firing of event - extension should run once on complete.     if (changeinfo.status == "complete") {                    chrome.webrequest.oncompleted.addlistener(              function(details) {                  console.log(details);                  // pseudo code, things pulled storage                  // based on then:                  executescript(tabid, "built_seo_traffic.js");              },              {                 urls: ["*://*/*"],                 types: ["main_frame"],                 tabid: tab.id             },             ["responseheaders"]          );     } });

what i've tried

i've tried setting variable checks if event has fired, can script runs once across tabs, rather once on each tab.

am tackling correctly? missing makes easy?

thanks @woxxom managed following solution:

chrome.tabs.onupdated.addlistener(function(tabid, changeinfo, tab) {     // prevent double firing of event - extension should run once on complete.     if (changeinfo.status == "complete") {                    chrome.webrequest.oncompleted.addlistener(              executetrafficlights,              {                 urls: ["*://*/*"],                 types: ["main_frame"],                 tabid: tab.id             },             ["responseheaders"]          );     } });   executetrafficlights(details){     console.log(details);     // pseudo code, things pulled storage     // based on then:     executescript(tabid, "built_seo_traffic.js");      // remove self after executing     chrome.webrequest.oncompleted.removelistener(executetrafficlights); }

notably part had been struggling because named function can called without parameters wasn't sure how pass in tabid , tab.

turns out both pieces of information needed (the tabid , url) in details object.

unsure if there other information contained in tab isn't in details, me worked great!


Comments

Post a Comment

Popular posts from this blog

What is happening when Matlab is starting a "parallel pool"? -

running parallel cpu processes in matlab starts command parpool() according documentation , function: [creates] special job on pool of workers, , [connects] matlab client parallel pool. this function takes bit of time execute, on order of 30 seconds. in other multi-cpu paradigms openmp, parallel execution seems totally transparent -- i've never noticed behavior analogous matlab (granted i'm not experienced parallel programming). so, happening between time parpool() called , when finishes executing? takes long? parallel computing toolbox enables run matlab code in parallel using several different paradigms (e.g. jobs , tasks, parfor , spmd , parfeval , batch processing), , run either locally (parallelised across cores in local machine) or remotely (parallelised across machines in cluster - either 1 own, or 1 in cloud). in of these cases, code run on matlab workers , copies of matlab without interactive desktop. if you're intending run on remo...
Read more

angular - DownloadURL return null in below code -

when change file updated in firebase storage when try downloadurl show null. filechange(event: any) { const imagefolder: string = this.employee.id; const filelist: filelist = event.target.files; const file: file = filelist[0]; const storageref = firebase.storage().ref().child(`${imagefolder}/profile.jpg`).put(file); console.log(storageref.snapshot.downloadurl); } the put() asynchronous. if want url after file uploaded have this: firebase.storage().ref().child(`${imagefolder}/profile.jpg`).put(file).then((snapshot) => { storageref = snapshot.downloadurl: console.log(snapshot.downloadurl); });
Read more

php - Cannot override Laravel Spark authentication with own implementation -

during login process of laravel spark need request token of remote api. api stores exact same users , passwords laravel spark application. therefore need username , non hashed password of user during authentication process. i thought overriding authenticated method solution problem. in routes/web.php override post /login endpoint , pointing endpoint own logincontroller: <?php namespace app\http\controllers\auth; use illuminate\support\facades\log; use illuminate\http\request; use laravel\spark\http\controllers\auth\logincontroller sparklogincontroller; class logincontroller extends sparklogincontroller { /** * create new login controller instance. * * @return void */ public function __construct() { parent::__construct(); } /** * handle successful authentication attempt. * * @param request $request * @param \illuminate\contracts\auth\authenticatable $user * @return response */ public fu...
Read more