Class: Xlsxrb::Ooxml::ZipReader

Inherits:
Object
  • Object
show all
Defined in:
lib/xlsxrb/ooxml/zip_reader.rb

Overview

Reads ZIP archives using only stdlib (zlib). Scans local file headers sequentially — works with non-seekable IO.

Constant Summary collapse

LOCAL_HEADER_SIG = 
"PK\x03\x04".b
MAX_UNCOMPRESSED_SIZE =

500MB per file limit

500 * 1024 * 1024

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(io) ⇒ ZipReader

Returns a new instance of ZipReader.



32
33
34
35
 
# File 'lib/xlsxrb/ooxml/zip_reader.rb', line 32

def initialize(io)
  @io = io
  @entries = nil
end

Class Method Details

.open(source) ⇒ Object

Opens a ZIP from a file path or IO and yields the reader.



18
19
20
21
22
23
24
25
26
27
28
29
30
 
# File 'lib/xlsxrb/ooxml/zip_reader.rb', line 18

def self.open(source)
  io = source.is_a?(String) ? File.open(source, "rb") : source
  reader = new(io)
  if block_given?
    begin
      yield reader
    ensure
      io.close if source.is_a?(String)
    end
  else
    reader
  end
end

Instance Method Details

#each_entry(&block) ⇒ Object

Yields (entry_name, data_string) for each file in the archive.



50
51
52
53
54
 
# File 'lib/xlsxrb/ooxml/zip_reader.rb', line 50

def each_entry(&block)
  return enum_for(:each_entry) unless block

  entries.each_pair(&block)
end

#read_all ⇒ Object

Returns a Hash { entry_name => raw_bytes } for all entries.



38
39
40
41
42
 
# File 'lib/xlsxrb/ooxml/zip_reader.rb', line 38

def read_all
  result = {}
  each_entry { |name, data| result[name] = data }
  result
end

#read_entry(name) ⇒ Object

Returns raw bytes for a single entry, or nil if not found.



45
46
47
 
# File 'lib/xlsxrb/ooxml/zip_reader.rb', line 45

def read_entry(name)
  entries[name]
end