We are making an app that parses information from our school portal. The problem is that the information you want to parse seems to be the value expressed in the Java portlet, not in the html form.
I planned to think simply and send the appropriate request to the portal web server and parse the response accordingly. But I can't find the information I need even if I try to capture all the packets using wireshark. Obviously, you've sent a query to the database with information about the student I thought I was spraying the information I received on the portlet, but there must have been a mistake.
Class files, jsp files, etc. are all used as clients so that the website can be viewed from the client I checked to download and run it, but why can't I see the important data in the packet?
web java database packet
If certain data has been passed from the server to the client, it is normal to see it in wirehsark. You might not be able to see it if you didn't set up the NIC with traffic, but I don't think this is a problem because you can see other packets.
In the case of the Java app, there is a higher probability of transmitting data to a protocol implemented within the app itself than the HTTP protocol used on the web, so it might not be seen if you filtered only with protocols such as HTTP in wireshark. Please make sure that there are no packets coming and going from the TCP end.
And maybe if it's a solution that's used in school portals, to some extent, you have to keep the level of security (I don't know about domestic law), so the data may come and go, but it may not be seen as a layout text. Keep Wireshark on the side and monitor it, and we recommend that you check the packets in real time that occur immediately when you actually send a request. If it's binary data, not plant text data, it might be encrypted or encoded, so I think you should reverse the claside app in that situation.
PS. Of course, it's hard to answer exactly why you can't see the relevant information without looking into it yourself.
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