Fixing some issues on special characters in names an non latin1 characters in names and values

[vboehm]

When trying to save and restore the InfluxDB data for my HomeAssistant instance I ran into some errors:

• It is impossible to save measurements containing a slash ('/') like 'm/s', 'l/h' or 'm³/d'.
  You can replace the slash in the filename by another charachter (U+2044 FRACTION SLASH,
  U+2215 DIVISION SLASH, U+2571 is BOX DRAWINGS LIGHT DIAGONAL UPPER RIGHT TO LOWER LEFT etc.) or a sequence of characters ('<@>', '=>' or what you like).
  I preferred the U+2571 solution and fixed it in this way.
• Identifiers (measurements, tag keys and field keys) containing some characters are not stored correctly
  Since it is allowed to use Blank (' '), comma (',') and equal sign ('=') in tag keys and field keys and blanks and commas in measurements (see InfluxDB documentation), these characters must also be escaped. Until now (commit #166779d) only values are escaped.
  I fixed this also.
• Measurements, tag keys, fields keys or values containing non-latin1 characters cannot be restored When restoring files containing characters which are not included in the latin1 character set, the build of the write request failed. When the data parameter to requests.post() is a string it will be converted to the standard HTTP character set latin1 which fails for non-latin1 characters.
  When this parameter is of type bytes no conversion takes place and everything works fine.
  This issue is also fixed.

The 1st and 3rd flaw were already mentioned in the issues #3 and #6.

I hope these changes make this nice program a little bit more usable :-)

Volker Böhm (volker@vboehm.de)

P.S.: I have a working copy of the changes in my git repository but I don't know how to put it into a pull request on GitHub.

I attached the updated file influx-backup.py as influx-backup.txt since the bloody GitHub does not accept PY-files :-( influx-backup .txt

[roman-vynar]

Many thanks!

I have also amended this line

                     else:
                         if type(val) == str:
-                            val = val.replace(' ', '\ ').replace(',', '\,').replace('=', '\=')
+                            val = identifier2lineprotocol(val)

[roman-vynar]

Pushed as https://github.com/Quiq/influxdb-tools/commit/3789263524dd9cd23a78203e4957c932c93c8b6f