Facebook Callback appends '#_=_' to Return

2楼-- · 2018-12-31 21:33

I know this reply is late, but if you are using passportjs, you might want to see this.

return (req, res, next) => {
    console.log(req.originalUrl);
    next();
};

I have written this middleware and applied it to express server instance, and the original URL I've got is without the "#_=_". Looks like it when we apply passporJS' instance as middleware to the server instance, it doesn't take those characters, but are only visible on the address bar of our browsers.

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初与友歌

3楼-- · 2018-12-31 21:36

TL;DR

if (window.location.hash == '#_=_'){
    history.replaceState 
        ? history.replaceState(null, null, window.location.href.split('#')[0])
        : window.location.hash = '';
}

Full version with step by step instructions

// Test for the ugliness.
if (window.location.hash == '#_=_'){

    // Check if the browser supports history.replaceState.
    if (history.replaceState) {

        // Keep the exact URL up to the hash.
        var cleanHref = window.location.href.split('#')[0];

        // Replace the URL in the address bar without messing with the back button.
        history.replaceState(null, null, cleanHref);

    } else {

        // Well, you're on an old browser, we can get rid of the _=_ but not the #.
        window.location.hash = '';

    }

}

Step by step:

We'll only get into the code block if the fragment is #_=_.
Check if the browser supports the HTML5 window.replaceState method.
1. Clean the URL by splitting on # and taking only the first part.
2. Tell history to replace the current page state with the clean URL. This modifies the current history entry instead of creating a new one. What this means is the back and forward buttons will work just the way you want. ;-)
If the browser does not support the awesome HTML 5 history methods then just clean up the URL as best you can by setting the hash to empty string. This is a poor fallback because it still leaves a trailing hash (example.com/#) and also it adds a history entry, so the back button will take you back to #_-_.

Learn more about history.replaceState.

Learn more about window.location.

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步步皆殇っ

4楼-- · 2018-12-31 21:38

Not sure why they're doing this but, you could get around this by reseting the hash at the top of your page:

if (window.location.hash == "#_=_")
  window.location.hash = "";

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还给你的自由

5楼-- · 2018-12-31 21:38

A change was introduced recently in how Facebook handles session redirects. See "Change in Session Redirect Behavior" in this week's Operation Developer Love blog post for the announcement.

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宁负流年不负卿

6楼-- · 2018-12-31 21:41

This would remove the appended characters to your url

<script type="text/javascript">
 var idx=window.location.toString().indexOf("#_=_"); 
   if (idx > 0) { 
     window.location = window.location.toString().substring(0, idx); 
   } 
</script>

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永恒的永恒

7楼-- · 2018-12-31 21:43

Major annoying, especially for apps that parse the URI and not just read the $_GET... Here's the hack I threw together... Enjoy!

<html xmlns:fb='http://www.facebook.com/2008/fbml'>
<head>
        <script type="text/javascript">
        // Get rid of the Facebook residue hash in the URI
        // Must be done in JS cuz hash only exists client-side
        // IE and Chrome version of the hack
        if (String(window.location.hash).substring(0,1) == "#") {
                window.location.hash = "";
                window.location.href=window.location.href.slice(0, -1);
                }
        // Firefox version of the hack
        if (String(location.hash).substring(0,1) == "#") {
                location.hash = "";
                location.href=location.href.substring(0,location.href.length-3);
                }
        </script>
</head>
<body>
URI should be clean
</body>
</html>

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Facebook Callback appends '#_=_' to Return

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