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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin: 10px 0 0 0; margin-top: 0">I've tried Logback's TeeFilter, but it did not capture the HTTP POST data for me.</p> <p style="margin: 10px 0 0 0">Thus I used Wireshark to log incoming POST data (SSL is already decrypted at our loadbalancer):</p>
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# nohup tshark -Y http.request.method==POST -Tfields -e frame.time -e http.file_data >>/tmp/tshark.log &
</pre>
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</div> <p style="margin: 10px 0 0 0">Working POST data looks like this:</p>
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_shib_idp_consentIds=uid&_shib_idp_consentIds=eduPersonScopedAffiliation&_shib_idp_consentIds=eduPersonEntitlement&_shib_idp_consentIds=UniMrLinkToPeople&_eventId_proceed=Accept
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</div> <p style="margin: 10px 0 0 0">Here is some problematic POST data which was sent by Firefox 49 / user-agent "Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:49.0) Gecko/20100101 Firefox/49.0":</p>
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_shib_idp_consentIds=%5B%22uid%22%2C%22eduPersonScopedAffiliation%22%2C%22eduPersonEntitlement%22%2C%22UniMrLinkToPeople%22%5D&_eventId_proceed=Accept
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</div> <p style="margin: 10px 0 0 0">It looks the same for Chrome 54 / user-agent "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.71 Safari/537.36":</p>
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_shib_idp_consentIds=%5B%22uid%22%2C%22eduPersonScopedAffiliation%22%2C%22eduPersonEntitlement%22%2C%22UniMrLinkToPeople%22%5D&_eventId_proceed=Accept
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</div> <p style="margin: 10px 0 0 0">Seems as if form data was encoded as JSON array by the browser. If we decode the masked chars, it reads as follows:</p>
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_shib_idp_consentIds=["uid","eduPersonScopedAffiliation","eduPersonEntitlement","UniMrLinkToPeople"]&_eventId_proceed=Accept
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