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Request Entity Too large 413 error on SSL secured page

For file upload on a SSL secured page, you may sometimes encounter a "Request Entity Too large 413 error" if you wait for too long before clicking on upload button. An article on the IIS forum page points to a possible bug on IIS settings and a tweak is needed to solve this problem.

Set correct value:
%windir%\system32\inetsrv\appcmd set config -section:system.webserver/serverruntime /uploadreadaheadsize:204800 /commit:apphost

cscript adsutil.vbs set w3svc/uploadreadaheadsize 204800

To view setting:
cscript adsutil.vbs get w3svc/UploadReadAheadSize

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