fpb should detect when given binary input

[chriskuehl]

This isn't so great:

baisang@redacted ~> fpb logs.zip
Traceback (most recent call last):
  File "/usr/bin/fpb", line 11, in <module>
    sys.exit(paste_main())
  File "/opt/venvs/fluffy/lib/python3.6/site-packages/fluffy_cli/main.py", line 200, in paste_main
    return paste(args.server, args.file, args.language, args.regex, auth, args.direct_link, args.tee)
  File "/opt/venvs/fluffy/lib/python3.6/site-packages/fluffy_cli/main.py", line 95, in paste
    content = f.read()
  File "/opt/venvs/fluffy/lib/python3.6/codecs.py", line 321, in decode
    (result, consumed) = self._buffer_decode(data, self.errors, final)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0x91 in position 12: invalid start byte

Let's detect when given a binary file and either upload it as a file automatically, or suggest using fput instead. It definitely shouldn't crash like this.

[chriskuehl]

How to tell if a file is binary? Maybe using identify, like in fluffy-server?

fluffy/fluffy/models.py

Lines 128 to 132 in a3b1709

	@cached_property
	def probably_binary(self):
	p = not identify.is_text(self.open_file)
	self.open_file.seek(0)
	return p

[chriskuehl]

Using identify doesn't work (unless we copy the function inline) since we don't want to add any additional dependencies to the cli. Maybe just check if it can be decoded?

I could imagine something like:

$ fpb some-file.bin
This file can't be decoded using UTF-8! This may indicate that it's a binary file, or using an unusual encoding.
What do you want to do?
  (1) Upload it as text, decoded using latin-1. This may produce garbled text.
  (2) Upload it as a binary file.

(For interactive use cases, of course.)