Chromium Embedded Framework Forum

by **wolf24** » Tue Feb 16, 2021 12:28 pm

Hello,

Opening the URL https://www.lakemedelsverket.se/ in cefclient.exe does not fully load this page, the main content is missing.

Tested with this app: https://cef-builds.spotifycdn.com/cef_b ... nt.tar.bz2

Any idea how to get this working?

Thanks,
Wolf

by **magreenblatt** » Tue Feb 16, 2021 12:37 pm

Are there any error messages in the DevTools console?

by **wolf24** » Tue Feb 16, 2021 1:02 pm

Yes. This is the debug log:

Code: Select all: [0216/190043.209:INFO:CONSOLE(1)] "ERROR [object Object]", source: https://www.lakemedelsverket.se/dist/main.js?v=20201207095638 (1) [0216/190047.154:INFO:CONSOLE(1)] "ERROR Error: Uncaught (in promise): t: {"headers":{"normalizedNames":{},"lazyUpdate":null},"status":404,"statusText":"OK","url":"https://www.lakemedelsverket.se/api/episerver/v2.0/content/100?expand=*","ok":false,"name":"HttpErrorResponse","message":"Http failure response for https://www.lakemedelsverket.se/api/episerver/v2.0/content/100?expand=*: 404 OK","error":"\r\n<!DOCTYPE html>\r\n\r\n<html lang=\"sv\">\r\n<head>\r\n\r\n <base href=\"/\">\r\n <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\r\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0, maximum-scale=2.0\" />\r\n\r\n <title></title>\r\n\r\n \r\n <meta property=\"og:url\" />\r\n <meta property=\"og:type\" content=\"article\" />\r\n <meta property=\"og:description\" />\r\n <meta property=\"og:image\" />\r\n \r\n \r\n <meta name=\"robots\">\r\n <meta name=\"robots\">\r\n <meta name=\"description\">\r\n\r\n\r\n \r\n <link rel=\"apple-touch-icon\" sizes=\"180x180\" href=\"/dist/assets/favicons/apple-touch-icon.png\">\r\n <link rel=\"icon\" type=\"image/png\" sizes=\"32x32\" href=\"/dist/assets/favicons/favicon-32x32.png\">\r\n <link rel=\"icon\" type=\"image/png\" sizes=\"16x16\" href=\"/dist/assets/favicons/favicon-16x16.png\">\r\n <link rel=\"manifest\" href=\"/dist/assets/favicons/site.webmanifest\">\r\n <link rel=\"mask-icon\" href=\"/dist/assets/favicons/safari-pinned-tab.svg\" color=\"#66c0f6\">\r\n <link rel=\"shortcut icon\" href=\"/dist/assets/favicons/favicon.ico\">\r\n <meta name=\"msapplication-TileColor\" content=\"#ffffff\">\r\n <meta name=\"msapplication-config\" content=\"/dist/assets/favicons/browserconfig.xml\">\r\n <meta name=\"theme-color\" content=\"#ffffff\">\r\n\r\n \r\n <meta name=\"format-detection\" content=\"telephone=no\">\r\n\r\n <link rel=\"stylesheet\" href=\"/dist/styles.css?v=20201207095638\" />\r\n\r\n \r\n\r\n \r\n <script type=\"text/javascript\">\r\n window.rsConf = {\r\n general: {\r\n usePost: true,\r\n selectionPlayer: '#readspeaker_button1'\r\n },\r\n params: '//cdn1.readspeaker.com/script/11228/webReader/webReader.js?pids=wr'\r\n };\r\n </script>\r\n <script src=\"//cdn1.readspeaker.com/script/11228/webReader/webReader.js?pids=wr\" type=\"text/javascript\"></script>\r\n<script type=\"text/javascript\">var appInsights=window.appInsights||function(config){function t(config){i[config]=function(){var t=arguments;i.queue.push(function(){i[config].apply(i,t)})}}var i={config:config},u=document,e=window,o=\"script\",s=\"AuthenticatedUserContext\",h=\"start\",c=\"stop\",l=\"Track\",a=l+\"Event\",v=l+\"Page\",r,f;setTimeout(function(){var t=u.createElement(o);t.src=config.url||\"https://az416426.vo.msecnd.net/scripts/a/ai.0.js\";u.getElementsByTagName(o)[0].parentNode.appendChild(t)});try{i.cookie=u.cookie}catch(y){}for(i.queue=[],r=[\"Event\",\"Exception\",\"Metric\",\"PageView\",\"Trace\",\"Dependency\"];r.length;)t(\"track\"+r.pop());return t(\"set\"+s),t(\"clear\"+s),t(h+a),t(c+a),t(h+v),t(c+v),t(\"flush\"),config.disableExceptionTracking||(r=\"onerror\",t(\"_\"+r),f=e[r],e[r]=function(config,t,u,e,o){var s=f&&f(config,t,u,e,o);return s!==!0&&i[\"_\"+r](config,t,u,e,o),s}),i}({instrumentationKey:\"f41a3a53-a9ca-4992-8aa1-afa7c4d8c650\",sdkExtension:\"a\"});window.appInsights=appInsights;appInsights.queue&&appInsights.queue.length===0&&appInsights.trackPageView();</script></head>\r\n<body>\r\n \r\n\r\n\r\n\r\n<input name=\"__RequestVerificationToken\" type=\"hidden\" value=\"R6RqSDn5oyvHfdl-GbL50PBg3vHOlLA5uzlIuJPK9CCMDvVJZWF1bCd5Wv5sE9lyq86e-1VrfISyVGuK_we6LyTfxNrcQmVhcBDwLjLwoWk1\" />\r\n\r\n<app-root></app-root>\r\n\r\n<script src=\"/dist/runtime.js?v=20201207095638\"></script>\r\n<script nomodule src=\"/dist/polyfills-es5.js?v=20201207095638\"></script>\r\n<script src=\"/dist/polyfills.js?v=20201207095638\"></script>\r\n<script src=\"/dist/main.js?v=20201207095638\"></script>\r\n\r\n \r\n</body>\r\n</html>"}", source: https://www.lakemedelsverket.se/dist/main.js?v=20201207095638 (1)

by **HarmlessDave** » Tue Feb 16, 2021 6:52 pm

That looks like errors in the scripts sent from the server, not a CEF problem.

What errors do you get in Google Chrome with the F12 developer tools open?

by **wolf24** » Wed Feb 17, 2021 2:28 am

In Google Chrome, I don't get an error in the developer tools. And the page is fully loaded.

Also other Chromium based browsers don't show an error in the dev tools. I only see this error in CEF.

by **amaitland** » Wed Feb 17, 2021 2:50 am

Have you considered they are blocking CEF based browsers? Wouldn't be the first time.

Try changing your user agent

by **amaitland** » Wed Feb 17, 2021 2:56 am

They may also be relying on features that are implemented in Chromium and not in CEF. CEF only supports a subset of the features chromium does.

by **ndesktop** » Wed Feb 17, 2021 4:23 am

Me I get a 400. It looks like is originating from a script - https://www.lakemedelsverket.se/api/routing?isEpi=false :

Code: Select all: main.js?v=20201207095638:formatted:7353 ERROR t {headers: e, status: 400, statusText: "OK", url: "https://www.lakemedelsverket.se/api/routing?isEpi=false", ok: false, …} Ze @ main.js?v=20201207095638:formatted:7353 e.handleError @ main.js?v=20201207095638:formatted:7365 (anonymous) @ main.js?v=20201207095638:formatted:10642 ...

and

Code: Select all: error: "Bad Request" headers: e {normalizedNames: Map(0), lazyUpdate: null, lazyInit: ƒ} message: "Http failure response for https://www.lakemedelsverket.se/api/routing?isEpi=false: 400 OK" name: "HttpErrorResponse" ok: false status: 400 statusText: "OK" url: "https://www.lakemedelsverket.se/api/routing?isEpi=false"

400 is Bad request which is done by ... their scripts (?!).

by **wolf24** » Wed Feb 17, 2021 5:37 am

Have you considered they are blocking CEF based browsers? Wouldn't be the first time.
Try changing your user agent

Changing the user agent did not change this behavior.

Honestly, I don't think that they block CEF.

I use CEF4Delphi which contains a very basic demo ("SimpleBrowser") that seems to work correctly with this page, the page is fully loaded. With the more advanced demo "MiniBrowser" (or also with the official cefsample.exe) this page does not work.

So it seems that this page stops working when certain CEF features are used.

by **ndesktop** » Wed Feb 17, 2021 6:55 am

With 4280 (modified, I admit): cefsimple loads normally, cefclient does not. Windows 10 x64.
Spotify builds do not deliver cefsimple.exe, I'm afraid.

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