Developers
AvantGo Channel Developer Guide

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AvantGo limitations

In order to optimize use of the limited resources on mobile devices, the AvantGo Client and the AvantGo sync servers place additional limitations on the web content that can be served through your channel.

  • Limited subset of HTML: Frames, style sheets, image maps, and a quite a few other features you may be used to using are not supported. See APPENDIX B. HTML 3.2 support in AvantGo Client 4.x, and when you're ready to support AvantGo Client 5.x, APPENDIX A. HTML 4 support in AvantGo Client 5.x.
  • No fancy plug-ins: Plug-ins, such as Macromedia Flash, are not currently supported.
  • 150-pixel graphic limit: If a channel page contains a graphic that is larger than 150x150 pixels, the AvantGo sync server will scale it down to this size before downloading it. If you really need to get around this limit you can break a single image into pieces — see Breaking the 150-pixel limit for how-to and caveats.
  • Channel size limit: You must specify a Maximum Channel Size in your channel setup — the AvantGo sync server stops downloading pages once that size is reached. See Size limit issues.
  • Cookies stored on server: With an AvantGo channel the cookies are stored on the server so that they do not have to be uploaded at the start of every sync. This means that you have to use different methods to inspect cookies when you are troubleshooting your channel. See Not sure cookie is being set properly in your channel and Tips for debugging cookies.


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