I’ve just completed the upgrade of the DojoX FileUploader to make it compatible with Flash Player 10. The FileUploader widget allows for the uploading of more than one file at a time, which is surprisingly still not supported natively by any web browser on the market today.
In Flash versions 8 and 9, a file upload Browse Dialog could be launched using JavaScript code. Users could click an HTML button, which would call a JavaScript function behind the scenes, communicate with a Flash (SWF) file, which would then trigger the browse() method in the SWF. The latest Flash Player has a security feature where the user must click within a Flash-based portion of the user interface to launch the Browse Dialog. This change is to prevent malicious code from continually opening the dialog without user interaction. Working toward this upgrade was a major undertaking that involved a significant rewrite of FileUploader. The results are a success, and in addition to working with the tightened security policies, it was a great opportunity to add many new features:
- Degradable
- CDN Support (see below for cross-domain restriction details)
- POST Data Support
- Custom Field Name Support
- Full Event Support
- Exposed CSS Positioning
- Dialog Container Detection
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