Golang using zlib compression and decompression strings

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In Python it is customary to use zlib for Web page compression.  Golang also uses zlib for compression decompression. Zlib official gives the method is very simple, here right when a supplement.

articles are often modified and updated. Annotated under Golang zlib original address, http://xiaorui.cc/?p=3084

Zlib.   Newwriter () can only pass []byte type data. The newwriterlevel can pass the compression level.

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">#xiaorui. Ccpackage mainimport ("bytes" "Compress/zlib" "FMT" "IO") func main () {var in bytes. Bufferb: = []byte (' xiorui.cc ') w: = Zlib. Newwriter (&in) w.write (b) W.close () var out bytes. Bufferr, _: = Zlib. Newreader (&in) io. Copy (&out, R) fmt. Println (out). String ())}</textarea>

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#xiaorui. CC PackageMainImport ("bytes""Compress/zlib""FMT""IO")funcMain() {varinch bytes.Bufferb := []byte(`Xiorui.cc`)W := zlib.Newwriter(&inch)W.Write(b)W.Close() var outbytes.BufferR, _ := zlib.Newreader(&inch)io.Copy(& out, R)FMT.Println( out.String())}

Library Package Address

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">import "Compress/zlib"</textarea>

12	Import "Compress/zlib"

Write

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">func newwriter func newwriter (w io). Writer) *writer</textarea>

1234	func Newwriter func newwriter( w io. Writer ) *Writer

To read compressed data

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">func newreader func newreader (r io. Reader) (IO. Readcloser, error)</textarea>

1234	func Newreader func newreader( r io. Reader ) (io. Readcloser , error)

Set the compression level and compress the data

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">func newwriterlevel (w io. Writer, Level int) (IO. Writecloser, OS. Error)</textarea>

12	func newwriterlevel Span class= "Crayon-sy" > ( w io writer level int ( io writecloser os error )

Here are a few levels.

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">Const (nocompression = 0 Bestspeed = 1 bestcompression = 9 Defaultcompression = 1 ) const (nocompression = Flate. Nocompression bestspeed = flate. Bestspeed bestcompression = flate. Bestcompression defaultcompression = flate. Defaultcompression)</textarea>

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Const (        nocompression = 0        Bestspeed     = 1        bestcompression    = 9        defaultcompression = -1)Const (    nocompression      = flate.nocompression    Bestspeed          = flate.Bestspeed    bestcompression    = flate.bestcompression    defaultcompression = flate.defaultcompression)

Write Data

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">func (*writer) write func (z *writer) write (P []byte) (n int, err error)</textarea>

1234	func (*Writer) Write    func (Z *Writer) Write(P []byte) (N int, ErrError)

Shut down

Python <textarea wrap="soft" class="crayon-plain print-no" data-settings="" readonly="" style="-moz-tab-size:4; -o-tab-size:4; -webkit-tab-size:4; tab-size:4; font-size: 12px !important; line-height: 15px !important;">func (*writer) close func (z *writer) Close () error</textarea>

1234	func ( * writer ) close        func ( z * writer ) Span class= "crayon-e" >close ( error

Goang zlib compression efficiency and performance are also possible, after all, rsync is also using this compression algorithm. in fact zlib and gzip contrast, seemingly with gzip a bit more. For example, Nginx gzip compression. Previously read a foreign post, is said zlib than gzip more suitable for that speed and compression effect of the scene.