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I'm working on pset7, register and I'm at a loss for how to fix this issue. I'm fairly certain my application.py logic is correct because once the form finally submits everything works as expected. I also don't think it's my HTML, because the login page as implemented by the staff is doing this too.

I tried putting a print() statement at the top of the register() function; and when the page first loads, it prints to the command line and the page displays. I fill in the form and submit, the print statement doesn't execute, and I get this in chrome:

This page isn’t working ide50-allclay1993.cs50.io didn’t send any data. ERR_EMPTY_RESPONSE

If I open dev tools, I see that the request fails, and there's no Request Method header. Then if I keep refreshing it eventually works. What else should I look at?

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  • Since login gives the same result, I would suspect something in the browser:settings, add-ons, cache? Have you tried ctrl-F5 refresh (clears cache)? Have you tried another browser? Or "safe-mode" (firefox lingo, add-ons disabled)? – DinoCoderSaurus Jul 24 '18 at 19:15
  • I didn't think to check those things, I just tried all of that in chrome, and still have the same issue. Installing firefox now. – Allan Clayton Jul 24 '18 at 19:48
  • It works more often in ff, but the issue still happens sometimes. However ff says "The connection to the server was reset while the page was loading." – Allan Clayton Jul 24 '18 at 20:20
  • Those two messages (ERR_EMPTY_RESPONSE and "...connection..reset") converge at http/https. And that heads down the rabbit hole of anti-virus, proxy, firewall. You might have to seriously parse through the network data in dev tools to find the difference between when it works and when it doesn't. I cannot make sense of the fact that repeated refresh eventually works. (Flaky internet cnxn?). Sorry, I've got nothin'. – DinoCoderSaurus Jul 24 '18 at 22:15
  • Thank You! I turned off my antimalware and firewall and it works perfectly now. – Allan Clayton Jul 24 '18 at 23:29
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To others with this issue: If all else fails, turning off your antivirus/malware and firewall may be the solution. Just don't forget to turn them back on afterwards!

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