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From "Shazron Abdullah (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CB-11835) Cordova image URIs may be cached
Date Tue, 04 Oct 2016 23:50:20 GMT

     [ https://issues.apache.org/jira/browse/CB-11835?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Shazron Abdullah updated CB-11835:
----------------------------------
    Component/s:     (was: iOS)

> Cordova image URIs may be cached
> --------------------------------
>
>                 Key: CB-11835
>                 URL: https://issues.apache.org/jira/browse/CB-11835
>             Project: Apache Cordova
>          Issue Type: Bug
>          Components: Plugin Camera
>    Affects Versions: 4.2.1
>         Environment: Reproduced on iPhone 6, iPad Pro, and iPad 3, with iOS 9.3.4.
>            Reporter: Jacob Weber
>            Priority: Minor
>
> This is not strictly a Cordova bug, but I think it should be added to the documentation,
as it could help people avoid a lot of pain.
> If you call camera.cleanup(), and then start calling camera.getPicture() with the default
Camera.destinationType.FILE_URI, Cordova will return image URIs with sequential numbers starting
at 1, like "cdv_photo_001.jpg".
> If you then repeat these steps, Cordova will start the numbering over, and return the
same sequence of image URIs.
> If you're setting an <img> tag's source to the URIs, as in the documented examples,
the browser may use cached images the second time. As a result, you might take a picture,
and then see an image of a picture you took a while ago.
> I would suggest changing the examples with {{img.src = imageURI}} to something like {{img.src
= imageURI + "?v=" + new Date().getTime()}}, so it avoids the cached image.
> Here is a test case. Create a project and add the following. When you click Capture the
first time, and take a picture, you'll see the correct preview. When you click it a second
time, and take a different picture, you'll still see the original picture's preview.
> {code}
> // config.xml
> ...
> <engine name="ios" spec="4.2.1" />
> <plugin name="cordova-plugin-camera" spec="2.2.0" />
> {code}
> {code}
> // index.html
> <button id="capture">Capture</button>
> <img id="preview" />
> <script>
> document.getElementById("capture").addEventListener("click", function() {
>   navigator.camera.cleanup();
>   navigator.camera.getPicture(
>     function(imageURI) {
>       document.getElementById("preview").src = imageURI;
>     },
>     function() {},
>     {
>       targetWidth: 200,
>       targetHeight: 200
>     }
>   );
> });
> </script>
> {code}



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