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How to check if a tab has been reloaded in background.js?

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隐瞒了意图╮
隐瞒了意图╮ 2020-12-12 01:00

I am writing a Chrome extension which needs to detect if the tab has been reloaded, that is to say, the user refreshed the page (either by pressing the refresh button, or pu

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  • 无人及你
    2020-12-12 01:19

    Use webNavigation

    The API to use from a script in the background context to determine when a page is actually reloaded, not just the URL being updated in-page without navigation, is webNavigation. You may want a webNavigation.onCommitted listener, which is the only event which has information as to why the page is navigating (transitionType and transitionQualifiers), but webNavigation.onDOMContentLoaded or webNavigation.onCompleted will also work, depending on what your actual needs are.

    If your goal really is to determine that it's a reload, not just a load, you will either need to keep a record of the current URL for each tab and compare the new URL against the old one, or use the TransitionType Object contained in the webNavigation.onCommitted's transitionType property, which will explicitly declare it a "reload".

    These are the events which occur when you reload a tab by clicking on the "reload this page" button:

    webNavigation.onBeforeNavigate    ->  arg[0]= {"frameId":0,"parentFrameId":-1,"processId":-1,"tabId":411,"timeStamp":1500401223978.314,"url":"http://www.example.com/"}        
webRequest.onBeforeRequest        ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestId":"260870","tabId":411,"timeStamp":1500401223979.044,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onBeforeSendHeaders    ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestHeaders":[{"name":"Upgrade-Insecure-Requests","value":"1"},{"name":"User-Agent","value":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36"},{"name":"Accept","value":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"},{"name":"Accept-Encoding","value":"gzip, deflate"},{"name":"Accept-Language","value":"en-US,en;q=0.8"}],"requestId":"260870","tabId":411,"timeStamp":1500401223979.3242,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onSendHeaders          ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestHeaders":[{"name":"Upgrade-Insecure-Requests","value":"1"},{"name":"User-Agent","value":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36"},{"name":"Accept","value":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"},{"name":"Accept-Encoding","value":"gzip, deflate"},{"name":"Accept-Language","value":"en-US,en;q=0.8"}],"requestId":"260870","tabId":411,"timeStamp":1500401223979.538,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onHeadersReceived      ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestId":"260870","responseHeaders":[{"name":"Content-Encoding","value":"gzip"},{"name":"Accept-Ranges","value":"bytes"},{"name":"Cache-Control","value":"max-age=604800"},{"name":"Content-Type","value":"text/html"},{"name":"Date","value":"Tue, 18 Jul 2017 18:07:03 GMT"},{"name":"Etag","value":"\"359670651\""},{"name":"Expires","value":"Tue, 25 Jul 2017 18:07:03 GMT"},{"name":"Last-Modified","value":"Fri, 09 Aug 2013 23:54:35 GMT"},{"name":"Server","value":"ECS (rhv/818F)"},{"name":"Vary","value":"Accept-Encoding"},{"name":"X-Cache","value":"HIT"},{"name":"Content-Length","value":"606"}],"statusCode":200,"statusLine":"HTTP/1.1 200 OK","tabId":411,"timeStamp":1500401224072.296,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onResponseStarted      ->  arg[0]= {"frameId":0,"fromCache":false,"ip":"93.184.216.34","method":"GET","parentFrameId":-1,"requestId":"260870","responseHeaders":[{"name":"Content-Encoding","value":"gzip"},{"name":"Accept-Ranges","value":"bytes"},{"name":"Cache-Control","value":"max-age=604800"},{"name":"Content-Type","value":"text/html"},{"name":"Date","value":"Tue, 18 Jul 2017 18:07:03 GMT"},{"name":"Etag","value":"\"359670651\""},{"name":"Expires","value":"Tue, 25 Jul 2017 18:07:03 GMT"},{"name":"Last-Modified","value":"Fri, 09 Aug 2013 23:54:35 GMT"},{"name":"Server","value":"ECS (rhv/818F)"},{"name":"Vary","value":"Accept-Encoding"},{"name":"X-Cache","value":"HIT"},{"name":"Content-Length","value":"606"}],"statusCode":200,"statusLine":"HTTP/1.1 200 OK","tabId":411,"timeStamp":1500401224072.5032,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onCompleted            ->  arg[0]= {"frameId":0,"fromCache":false,"ip":"93.184.216.34","method":"GET","parentFrameId":-1,"requestId":"260870","responseHeaders":[{"name":"Content-Encoding","value":"gzip"},{"name":"Accept-Ranges","value":"bytes"},{"name":"Cache-Control","value":"max-age=604800"},{"name":"Content-Type","value":"text/html"},{"name":"Date","value":"Tue, 18 Jul 2017 18:07:03 GMT"},{"name":"Etag","value":"\"359670651\""},{"name":"Expires","value":"Tue, 25 Jul 2017 18:07:03 GMT"},{"name":"Last-Modified","value":"Fri, 09 Aug 2013 23:54:35 GMT"},{"name":"Server","value":"ECS (rhv/818F)"},{"name":"Vary","value":"Accept-Encoding"},{"name":"X-Cache","value":"HIT"},{"name":"Content-Length","value":"606"}],"statusCode":200,"statusLine":"HTTP/1.1 200 OK","tabId":411,"timeStamp":1500401224074.0261,"type":"main_frame","url":"http://www.example.com/"}        
tabs.onUpdated                    ->  arg[0]= 411 :: arg[1]= {"status":"loading","url":"http://www.example.com/"} :: arg[2]= {"active":true,"audible":false,"autoDiscardable":true,"discarded":false,"height":902,"highlighted":true,"id":411,"incognito":false,"index":1,"mutedInfo":{"muted":false},"pinned":false,"selected":true,"status":"loading","title":"www.example.com","url":"http://www.example.com/","width":1282,"windowId":10}    
tabs.onZoomChange                 ->  arg[0]= {"newZoomFactor":1,"oldZoomFactor":1,"tabId":411,"zoomSettings":{"mode":"automatic","scope":"per-origin"}}        
webNavigation.onCommitted         ->  arg[0]= {"frameId":0,"processId":107,"tabId":411,"timeStamp":1500401224079.4019,"transitionQualifiers":[],"transitionType":"reload","url":"http://www.example.com/"}
--->>Here is where you can tell it's a reload --------------------------------------------------------------------------------------------------^^^^^^^^^^^^^^^^^^^^^^^^^
history.onVisited                 ->  arg[0]= {"id":"42","lastVisitTime":1500401224077.579,"title":"Example Domain","typedCount":1,"url":"http://www.example.com/","visitCount":12}        
tabs.onUpdated                    ->  arg[0]= 411 :: arg[1]= {"title":"Example Domain"} :: arg[2]= {"active":true,"audible":false,"autoDiscardable":true,"discarded":false,"height":902,"highlighted":true,"id":411,"incognito":false,"index":1,"mutedInfo":{"muted":false},"pinned":false,"selected":true,"status":"loading","title":"Example Domain","url":"http://www.example.com/","width":1282,"windowId":10}    
webNavigation.onDOMContentLoaded  ->  arg[0]= {"frameId":0,"processId":107,"tabId":411,"timeStamp":1500401224093.404,"url":"http://www.example.com/"}        
webNavigation.onCompleted         ->  arg[0]= {"frameId":0,"processId":107,"tabId":411,"timeStamp":1500401224094.768,"url":"http://www.example.com/"}        
tabs.onUpdated                    ->  arg[0]= 411 :: arg[1]= {"status":"complete"} :: arg[2]= {"active":true,"audible":false,"autoDiscardable":true,"discarded":false,"height":902,"highlighted":true,"id":411,"incognito":false,"index":1,"mutedInfo":{"muted":false},"pinned":false,"selected":true,"status":"complete","title":"Example Domain","url":"http://www.example.com/","width":1282,"windowId":10}

    Here are the events for when the user selects the address bar and hits Enter:

    webNavigation.onBeforeNavigate   ->  arg[0]= {"frameId":0,"parentFrameId":-1,"processId":-1,"tabId":411,"timeStamp":1500403090082.833,"url":"http://www.example.com/"}        
webRequest.onBeforeRequest       ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestId":"261350","tabId":411,"timeStamp":1500403090083.163,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onBeforeSendHeaders   ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestHeaders":[{"name":"Upgrade-Insecure-Requests","value":"1"},{"name":"User-Agent","value":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36"},{"name":"Accept","value":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"},{"name":"Accept-Encoding","value":"gzip, deflate"},{"name":"Accept-Language","value":"en-US,en;q=0.8"}],"requestId":"261350","tabId":411,"timeStamp":1500403090083.3289,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onSendHeaders         ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestHeaders":[{"name":"Upgrade-Insecure-Requests","value":"1"},{"name":"User-Agent","value":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.115 Safari/537.36"},{"name":"Accept","value":"text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8"},{"name":"Accept-Encoding","value":"gzip, deflate"},{"name":"Accept-Language","value":"en-US,en;q=0.8"}],"requestId":"261350","tabId":411,"timeStamp":1500403090083.4739,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onHeadersReceived     ->  arg[0]= {"frameId":0,"method":"GET","parentFrameId":-1,"requestId":"261350","responseHeaders":[{"name":"Accept-Ranges","value":"bytes"},{"name":"Cache-Control","value":"max-age=604800"},{"name":"Date","value":"Tue, 18 Jul 2017 18:38:09 GMT"},{"name":"Expires","value":"Tue, 25 Jul 2017 18:38:09 GMT"},{"name":"Last-Modified","value":"Fri, 09 Aug 2013 23:54:35 GMT"},{"name":"Server","value":"ECS (rhv/818F)"},{"name":"Vary","value":"Accept-Encoding"},{"name":"X-Cache","value":"HIT"},{"name":"Content-Encoding","value":"gzip"},{"name":"Content-Type","value":"text/html"},{"name":"Etag","value":"\"359670651\""},{"name":"Content-Length","value":"606"}],"statusCode":200,"statusLine":"HTTP/1.1 200 OK","tabId":411,"timeStamp":1500403090130.209,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onResponseStarted     ->  arg[0]= {"frameId":0,"fromCache":true,"ip":"93.184.216.34","method":"GET","parentFrameId":-1,"requestId":"261350","responseHeaders":[{"name":"Accept-Ranges","value":"bytes"},{"name":"Cache-Control","value":"max-age=604800"},{"name":"Date","value":"Tue, 18 Jul 2017 18:38:09 GMT"},{"name":"Expires","value":"Tue, 25 Jul 2017 18:38:09 GMT"},{"name":"Last-Modified","value":"Fri, 09 Aug 2013 23:54:35 GMT"},{"name":"Server","value":"ECS (rhv/818F)"},{"name":"Vary","value":"Accept-Encoding"},{"name":"X-Cache","value":"HIT"},{"name":"Content-Encoding","value":"gzip"},{"name":"Content-Type","value":"text/html"},{"name":"Etag","value":"\"359670651\""},{"name":"Content-Length","value":"606"}],"statusCode":200,"statusLine":"HTTP/1.1 200 OK","tabId":411,"timeStamp":1500403090130.3289,"type":"main_frame","url":"http://www.example.com/"}        
webRequest.onCompleted           ->  arg[0]= {"frameId":0,"fromCache":true,"ip":"93.184.216.34","method":"GET","parentFrameId":-1,"requestId":"261350","responseHeaders":[{"name":"Accept-Ranges","value":"bytes"},{"name":"Cache-Control","value":"max-age=604800"},{"name":"Date","value":"Tue, 18 Jul 2017 18:38:09 GMT"},{"name":"Expires","value":"Tue, 25 Jul 2017 18:38:09 GMT"},{"name":"Last-Modified","value":"Fri, 09 Aug 2013 23:54:35 GMT"},{"name":"Server","value":"ECS (rhv/818F)"},{"name":"Vary","value":"Accept-Encoding"},{"name":"X-Cache","value":"HIT"},{"name":"Content-Encoding","value":"gzip"},{"name":"Content-Type","value":"text/html"},{"name":"Etag","value":"\"359670651\""},{"name":"Content-Length","value":"606"}],"statusCode":200,"statusLine":"HTTP/1.1 200 OK","tabId":411,"timeStamp":1500403090131.1592,"type":"main_frame","url":"http://www.example.com/"}        
tabs.onUpdated                   ->  arg[0]= 411 :: arg[1]= {"status":"loading"} :: arg[2]= {"active":true,"audible":false,"autoDiscardable":true,"discarded":false,"height":902,"highlighted":true,"id":411,"incognito":false,"index":1,"mutedInfo":{"muted":false},"pinned":false,"selected":true,"status":"loading","title":"Example Domain","url":"http://www.example.com/","width":1282,"windowId":10}    
tabs.onZoomChange                ->  arg[0]= {"newZoomFactor":1,"oldZoomFactor":1,"tabId":411,"zoomSettings":{"mode":"automatic","scope":"per-origin"}}        
webNavigation.onCommitted        ->  arg[0]= {"frameId":0,"processId":107,"tabId":411,"timeStamp":1500403090135.629,"transitionQualifiers":["from_address_bar"],"transitionType":"reload","url":"http://www.example.com/"}        
--->>Here is where you can tell it's a reload ------------------------------------------------------------------------------------------------------------------^^^^^^^^^^^^^^^^^^^^^^^^^
--->>This tells you it was the user hitting [Enter] in the address bar----------------------------------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
history.onVisited                ->  arg[0]= {"id":"42","lastVisitTime":1500403090134.133,"title":"Example Domain","typedCount":1,"url":"http://www.example.com/","visitCount":12}        
webNavigation.onDOMContentLoaded ->  arg[0]= {"frameId":0,"processId":107,"tabId":411,"timeStamp":1500403090144.5688,"url":"http://www.example.com/"}        
webNavigation.onCompleted        ->  arg[0]= {"frameId":0,"processId":107,"tabId":411,"timeStamp":1500403090146.102,"url":"http://www.example.com/"}        
tabs.onUpdated                   ->  arg[0]= 411 :: arg[1]= {"status":"complete"} :: arg[2]= {"active":true,"audible":false,"autoDiscardable":true,"discarded":false,"height":902,"highlighted":true,"id":411,"incognito":false,"index":1,"mutedInfo":{"muted":false},"pinned":false,"selected":true,"status":"complete","title":"Example Domain","url":"http://www.example.com/","width":1282,"windowId":10}

    Alternately, use a content script to tell the background script the page has reloaded

    You can use a content script, defined in a content_scripts entry in your manifest.json, which is injected into the domains you desire to detect are loaded/reloaded. Each time the content script is run it can send a message, using runtime.sendMessage(), to the background script (received in a runtime.onMessage listener) telling the background script that the page has been loaded/reloaded.

    If you're monitoring a limited number of domains, this would be preferable, as the warning the user gets upon installing the extension will only state that the extension will have access to the specified domains, instead of all domains.

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