Hi,

during some investigation of the Umbraco codebase I noticed some weird output in calls to the provisioning endpoints such as /install/api/PostPerformInstall. The response started with the characters )]}', simply a bunch of unwanted closing tags since there are no opening tags. Investigation of the codebase led to the AngularJsonMediaTypeFormatter class, which does this:

using (StreamWriter writer = new StreamWriter(writeStream, encoding))
{
    writer.Write(")]}',\n");
    writer.Flush();
    return base.WriteToStreamAsync(type, value, writeStream, content, transportContext);
}

Given that is a bad practice of writing closing tags without doing the opening tags in the same method, I thought I'd report this issue here.

Regards,

Wouter