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POChrome tracks 2 history entries even when submitting a PRG-based form
 

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  1. POChrome tracks 2 history entries even when submitting a PRG-based form
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    <p>Chrome tracks TWO history entries - instead of only ONE - when submitting a form that implements "Post + Same Page Redirect + Get" method.</p> <h2>The steps that demonstrate this strange behaviour.</h2> <p>1 - I browse to the form page Naked form page : demo.html. Naked form page: <img src="https://i.stack.imgur.com/wroxT.png" alt="Naked form page (demo.html)"></p> <p>2 - I fill the form. Filled form:</p> <p><img src="https://i.stack.imgur.com/oT33m.png" alt="Filled form (demo.html)"></p> <p>3 - I submit the form. Submited -thus empty - form (at demo.html, as redirected from my PRG-based redirect-to-same-page.php):</p> <p><img src="https://i.stack.imgur.com/SiOaP.png" alt="enter image description here"></p> <p>4 - I click on the browser's "back" button once.</p> <h3>Chrome jumps back to the filled form (step)</h3> <p><img src="https://i.stack.imgur.com/uYP82.png" alt="enter image description here"></p> <p>5 - I need to click on the browser's "back" button another time to reach the page I was browsing before I went to that form page (say my browser's "google" default page): <img src="https://i.stack.imgur.com/9IwLW.png" alt="enter image description here"></p> <p>This happens with Chrome (version 25.0.1364.172) and Safari (6.0.2)</p> <h2>What I'm expecting</h2> <p>I'm expecting to have a single browser's "back" click to reach the page before the form. This is actually how Firefox (19.0.2) Opera (12.11), and IE (from version 6 to latest 10) behave.</p> <h2>My source code</h2> <p>demo.html</p> <pre><code>&lt;!DOCTYPE html&gt; &lt;html lang="en"&gt; &lt;head&gt; &lt;/head&gt; &lt;body&gt; &lt;form action="redirect-to-same-page.php" method="post"&gt; Type something and submit: &lt;input type="text" name="something" /&gt; &lt;!-- optional: autocomplete="off" --&gt; &lt;input type="submit" value="submit" /&gt; &lt;/form&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>redirect-to-same-page.php</p> <pre><code>&lt;?php header('Location: demo.html', true, 302); // not any of true/false 302/303 combinations are working // not working either: header("Refresh: 0; demo.html"); exit; ?&gt; </code></pre> <h2>What Chrome's web inspector reveals...</h2> <p>1 Before submission : <img src="https://i.stack.imgur.com/6NIYI.png" alt="enter image description here"></p> <p>2 After submission : <img src="https://i.stack.imgur.com/umD7W.png" alt="enter image description here"></p> <h2>My questions</h2> <p>I read similar questions and potential answers but none of them solved my problem.</p> <p>Is this behaviour a Chrome/Safari issue or a feature* ? (* in the case submission fails it retains a full backup of your filled form)</p> <p>Is there a correct or more defensive code for node.js or php to avoid this behaviour ?</p> <p>Thanks for your help</p>
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