The Programming Language

Crystal 0.12.0 released!

16 Feb 2016 by asterite

Crystal 0.12.0 has been released!

The major feature of this release is IO encoding support.

Strings in Crystal always denote UTF-8 encoded characters. Before this release, if you read a file whose encoding wasn’t UTF-8 the String ended with invalid byte sequences, and there was no way to specify the encoding.

Now you can do it, both for writing and reading. For example, to read a file encoded in, say, GB2312, you do:"file.txt", encoding: "GB2312")

The encoding can be set on all IOs (files, sockets, pipes, memory):

# Write a string encoded in GB2312 in memory
io =
io.set_encoding "GB2312"
io.print "你好"

# See the resulting bytes
puts io.to_slice # => [196, 227, 186, 195]

Additionally, HTTP::Client will use the charset specified in the Content-Type header so you can now fetch non-UTF-8 web sites.

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