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Connection gets reset for HTTP POST (certain inputs) #27

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pidu opened this issue Apr 1, 2022 · 3 comments
Open

Connection gets reset for HTTP POST (certain inputs) #27

pidu opened this issue Apr 1, 2022 · 3 comments

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@pidu
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pidu commented Apr 1, 2022

I ran into this the other day. Consider the following handler:

(ws-start
 (lambda (req)
  (with-slots (process headers) req
   (let ((is-post (assoc :POST headers)))
    (if is-post
     (progn
      (ws-response-header process 200
       '("Content-Type" . "text/plain; utf-8"))
      (process-send-string process (cdr (assoc "param" headers))))
     (progn
      (ws-response-header process 200
       '("Content-Type" . "text/html; charset=utf-8"))
      (process-send-string process
       (format "<!DOCTYPE html>
                <html>
                <body>
                <form method=%S>
                <textarea name=%S></textarea>
                <input type=%S value=%S />
                </form>
                </body>
                </html>" "post" "param" "submit" "Send")))))))
 9090)

Now visit for instance: https://www.gnu.org/software/emacs/manual/html_node/emacs/Coding-Systems.html

Copy the page contents, paste it into the the form and submit.

Behold, connection gets reset.
@pidu
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pidu commented Apr 1, 2022

I haven't been able to determine why but it almost seems to be size-related. Copy smaller parts of the input and pasting them works fine.

@pidu
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pidu commented Apr 1, 2022

Not sure if Emacs version makes a difference, but I ran into this on Emacs 27.1 and 27.2

@pidu
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pidu commented Apr 1, 2022

Ah...it works with multipart/form-data

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