TechNote

File Upload Fails with Flash Player 10 for Solaris with 417 Expectation Failed

Issue

File Upload Fails with Flash Player for Solaris with 417 Expectation Failed

Reason

This is the result of the Flash Player sending a blank "Expect" with Flash Player 10. This Flash Player Bug #2440351 will be resolved in a future release of the Flash Player.

Solution

Overwrite the Expect headers for your web server.

To do this with Apache:

Use mod_headers to ignore the Expect call by modifying the Apache httpd.conf

1) Edit the httpd.conf file in the <APACHE_HOME>/conf directory

2) Add or uncomment the follow line:
LoadModule headers_module modules/mod_headers.so

3) Add the following to remove any "Expect" header.

<IfModule mod_headers.c>
RequestHeader unset Expect early
</IfModule>

NOTE: It's also possible to edit and add data to the expect headers with mod_headers. Consult your Apache administrator before making these changes as it may impact other applications that depend on the Expect header.

Please contact Adobe support if you have additional questions,