On Tue, Dec 15, 2015 at 2:37 PM, Thomas Steiner <[email protected]> wrote:
> On a more technical note—trying to be a good citizen [3]—the client > library sets an identifying User-Agent header in Node.js mode. > However, trying to set the corresponding X-User-Agent (note the "X-") > header from a browser context (XMLHttpRequest cannot override the > browser's intrinsic User-Agent for security reasons), this fails with > an error message "Request header field X-User-Agent is not allowed by > Access-Control-Allow-Headers in preflight response". Maybe you could > change your CORS settings and include X-User-Agent in your > Access-Control-Allow-Headers?! > Filed as https://phabricator.wikimedia.org/T121823
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