Failed to execute 'send' on XMLHttprequest' - Sitecore

Question

We are using sitecore 7.2 with Coveo for sitecore(3.0). When I try to edit a rich text field for an item using EditHtml, I am getting this message below and not able to accept the changes.

Failed to execute 'send' on XMLHttprequest': Failed to load 'https://www.cm.instancename.com/sitecore/shell/~/xaml/sitecore.shell.applications.contenteditor.Dialogs.EditHtml.aspx?hdl=someGuid.

But when i try make changes using ShowEditor and use Design, the changes I made are accepted.

Can anyone help me to understand why this issue is occurring.

Answer 1

It seems like your webservers operate behind a load balancer/proxy, SSL certificate is installed only on the load balancer/proxy and communication between load balancer/proxy and Sitecore is plain HTTP.

Client -> HTTPS -> Load Balancer/proxy -> ALWAYS http -> server

I am afraid Sitecore does not completely support this configuration. As far as I remember, some part of Sitecore does use context URL as a basis of generating/modifying URLs. Such configuration was not tested and is not officially supported. In this case, you may experience the following issues: You will not be able to open a number of the Sitecore dialogs due to their iframe src value set to http://... .

Always include a server URL setting that cannot be used since it will generate the wrong URL.

So, full SSL appears to be a safe option for now.

Cliend -> HTTPS -> Proxy -> HTTPS -> Sitecore

You have to do this in IIS directly.

Following article may be helpful:

http://weblogs.asp.net/scottgu/archive/2007/04/06/tip-trick-enabling-ssl-on-iis7-using-self-signed-certificates.aspx

https://doc.sitecore.net/sitecore_experience_platform/setting_up__maintaining/security_hardening/configuring/increase_login_security