# Zlib::GzipReader < Zlib::GzipFile
Enumerable (from ruby core)
(from ruby core)
Zlib::GzipReader is the class for reading a gzipped file. GzipReader
should be used as an IO, or -IO-like, object.
File.open('hoge.gz') do |f|
gz = Zlib::GzipReader.new(f)
## Method Catalogue
The following methods in Zlib::GzipReader are just like their
counterparts in IO, but they raise Zlib::Error or Zlib::GzipFile::Error
exception if an error was found in the gzip file.
Be careful of the footer of the gzip file. A gzip file has the checksum
of pre-compressed data in its footer. GzipReader checks all uncompressed
data against that checksum at the following cases, and if it fails,
raises `Zlib::GzipFile::NoFooter`, `Zlib::GzipFile::CRCError`, or
* When an reading request is received beyond the end of file (the end
of compressed data). That is, when Zlib::GzipReader#read,
Zlib::GzipReader#gets, or some other methods for reading returns
* When Zlib::GzipFile#close method is called after the object reaches
the end of file.
* When Zlib::GzipReader#unused method is called after the object
reaches the end of file.
The rest of the methods are adequately described in their own
# Class methods:
# Instance methods: