CGI script end of script before headers
Question
I have a VPS server with Apache on it. I want to execute simple CGI script. I created a python script, saved it as .cgi file and placed it to the folder cgi-bin, but it only displays error message: "End of script output before headers".
However when I saved this script as .py file and did not place it into cgi-bin folder, it worked, but whenever there was an error, it did not show any error message, just server error. Command cgitb.enable() did not show any error.
I tried to give the file 755 permission, but that still did not solve my problem.
Where could be a problem?
Source code:
#!/usr/local/bin/python3
print("Content-type:text/html")
print("")
print ("<html><head><title>CGI</title></head>")
print ("<body>")
print ("hello cgi")
print ("</body>")
print ("</html>")
Thank you for your answers.
1 answers
solution1
0 2017-10-09 10:31:52
It might be more useful to use sys.stdout.write and add \\n so that you know exactly what gets written to standard output:
#!/usr/bin/env python
import sys
import os
sys.stdout.write('Status: 200 OK\n')
sys.stdout.write('Content-Type: text/html; charset=utf-8\n\n')
sys.stdout.write('<html><body>Hello, world!</body></html>\n')
sys.exit(os.EX_OK)
Run the script with python script.py | cat -e python script.py | cat -e so that you can verify line endings.
Make sure you aren't sending any more HTTP headers after you start sending content.
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