问题
I am developing a web app with an ASP server side and I use an iframe for data push.
An ASP handler flushes every once in a while some javascript to the iframe:
context.Response.Write("<script language='javascript'>top.update('lala');</script>");
context.Response.Flush();
My problem is that sometimes, when I receive the data, I don't get the full text.
For example I will receive this : <script language='javascript'>update('lala');</
Unfortunately this prevents the javascript code from being executed if no other data is to come during the next second or so.
One workaround I have is to have a thread flushing '..........' every 500ms. (Then I will receive script>...... which will complete my javascript.)
However I am sure there must be a way to have Response.Flush() sending the whole chunk of data. Does someone have an idea on how to use properly Response.Flush() ?
Thank you!
Charles
回答1:
One of my coworkers figured out the problem. Gzip compression was enabled on IIS, which was preventing the web browsers getting full chunks of data.
Among the solutions:
Disable compression for all websites:
For IIS 5.1, go to Control Panel/Administrative Tools/Internet Information Services. Right click on Web Sites, click on properties and remove the ISAPI filter Compression.
For IIS 7, go to My Documents/IISExpress/config/applicationHost.config and change the part httpCompression so that compression is not enabled for your particular page.
Disable compression just for your website:
In the web.config file of your application, add the line <urlCompression doStaticCompression="true" doDynamicCompression="false"/> under the section <system.webServer>.
Disable compression for a particular web page or a particular request
These good guys found a way to do it:
Can gzip compression be selectively disabled in ASP.NET/IIS 7?
回答2:
If you use gzip compression ratio up to 3, IIS serves chunked page. And there is no significant difference between gzip ratio 3 and 9. Look at IIS compression ratio test
来源：https://stackoverflow.com/questions/11024580/asp-response-flush-flushes-partial-data