fix: prevent uncontrolled redirect on /go/app/download - #839
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The `/go/app/download/<platform>` endpoint has a parameter `url` which is intended for internal use on this site, but the parameter was not validated, so it could be abused for random redirects to any site. Now requires the url to point to downloads.keyman.com; a more comprehensive fix could remove the hostname altogether from the redirector and just have a path (but this mitigates for now). Test-bot: skip
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The
/go/app/download/<platform>endpoint has a parameterurlwhich is intended for internal use on this site, but the parameter was not validated, so it could be abused for random redirects to any site. Now requires the url to point to downloads.keyman.com; a more comprehensive fix could remove the hostname altogether from the redirector and just have a path (but this mitigates for now).Test-bot: skip