Unicode issue with Python v3.3

[Cameron Simpson]

On 12Apr2013 21:50, nagia.retsina at gmail.com <nagia.retsina at gmail.com> wrote:
| Ookey after that is corrected, i then tried the plain solution and i got this response back form the shell:
| 
| Traceback (most recent call last):
|   File "metrites.py", line 213, in <module>
|     htmldata = f.read()
|   File "/root/.local/lib/python2.7/lib/python3.3/encodings/iso8859_7.py", line 23, in decode
|     return codecs.charmap_decode(input,self.errors,decoding_table)[0]
| UnicodeDecodeError: 'charmap' codec can't decode byte 0xae in position 47: character maps to <undefined>
| 
| then i switched to:
| 
| 		with open('/home/nikos/www/' + page, encoding='utf-8') as f:
| 			htmldata = f.read()
| 
| and i got no error at all, just pure run *from the shell*!

Ok, so you need to specify utf-8 to decode the file. Good.

| But i get internal server error when i try to run the webpage from the browser(Chrome).

That is standard for a CGI script that does not complete successfully.

| So, can you tell me please where can i find the apache error log so to display here please?

That depends on the install. Have a look in /var/log/apache or similar.
Otherwise you need to find the httpd.conf for the apache and look
for its log coniguration settings.

| Apcher error_log is always better than running 'python3 metrites.py' because even if the python script has no error apache will also display more web related things?

The error log is where error messages from CGI scripts go. And other error messages.
It is very useful when testing CGI scripts.

Of course, it's best to work out as much as possible from the command
line first; you have much more direct control and access to errors
there. That only gets you so far though; the environment the CGI
script runs in is not the same as your command line, and some
different behaviour can come from this.

BTW, are you sure python3 is running your CGI script?
Also, the CGI script may not be running as you, but as the apache user.
In that case, it may fail if it does not has permission to access various
files owned by you.

Anyway, you need to see the error messages to work this out.

If you can't find the error log you can divert stderr at the
start of your python program:

  sys.stderr = open('/home/nikos/cgi.err.out', 'a')

and watch that in a shell:

  tail -f cgi.err.out

Cheers,
-- 
Cameron Simpson <cs at zip.com.au>

If you 'aint falling off, you ar'nt going hard enough.  - Fred Gassit