89 lines
2.3 KiB
Ruby
89 lines
2.3 KiB
Ruby
$:.unshift(File.join(File.dirname(__FILE__), '..', 'lib'))
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require 'mongo'
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require 'mongo/gridfs'
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include Mongo
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include GridFS
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host = ENV['MONGO_RUBY_DRIVER_HOST'] || 'localhost'
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port = ENV['MONGO_RUBY_DRIVER_PORT'] || Connection::DEFAULT_PORT
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puts "Connecting to #{host}:#{port}"
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db = Connection.new(host, port).db('ruby-mongo-examples')
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def dump(db, fname)
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GridStore.open(db, fname, 'r') { |f| puts f.read }
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end
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# Write a new file
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GridStore.open(db, 'foobar', 'w') { |f| f.write("hello, world!") }
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# Read it and print out the contents
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dump(db, 'foobar')
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# Append more data
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GridStore.open(db, 'foobar', 'w+') { |f| f.write("\n"); f.puts "line two" }
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dump(db, 'foobar')
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# Overwrite
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GridStore.open(db, 'foobar', 'w') { |f| f.puts "hello, sailor!" }
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dump(db, 'foobar')
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# File existence tests
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puts "File 'foobar' exists: #{GridStore.exist?(db, 'foobar')}"
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puts "File 'does-not-exist' exists: #{GridStore.exist?(db, 'does-not-exist')}"
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# Read with offset (uses seek)
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puts GridStore.read(db, 'foobar', 6, 7)
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# Rewind/seek/tell
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GridStore.open(db, 'foobar', 'w') { |f|
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f.write "hello, world!"
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f.rewind
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f.write "xyzzz"
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puts f.tell # => 5
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f.seek(4)
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f.write('y')
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}
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dump(db, 'foobar') # => 'xyzzy'
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# Unlink (delete)
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GridStore.unlink(db, 'foobar')
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puts "File 'foobar' exists after delete: #{GridStore.exist?(db, 'foobar')}"
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# Metadata
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GridStore.open(db, 'foobar', 'w') { |f| f.write("hello, world!") }
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GridStore.open(db, 'foobar', 'r') { |f|
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puts f.content_type
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puts f.upload_date
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puts f.chunk_size
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puts f.metadata.inspect
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}
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# Add some metadata; change content type
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GridStore.open(db, 'foobar', 'w+') { |f|
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f.content_type = 'text/xml'
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f.metadata = {'a' => 1}
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}
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# Print it
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GridStore.open(db, 'foobar', 'r') { |f|
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puts f.content_type
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puts f.upload_date
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puts f.chunk_size
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puts f.metadata.inspect
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}
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# You can also set metadata when initially writing the file. Setting :root
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# means that the file and its chunks are stored in a different root
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# collection: instead of gridfs.files and gridfs.chunks, here we use
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# my_files.files and my_files.chunks.
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GridStore.open(db, 'foobar', 'w',
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:content_type => 'text/plain',
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:metadata => {'a' => 1},
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:chunk_size => 1024 * 4,
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:root => 'my_files') { |f|
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f.puts 'hello, world'
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}
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