Brother Lian Blockchain training share go language compression and decompression

In the first quarter of 2018, the demand for blockchain-related talent had reached 9.7 times times the same period in 2017, with a 4.6 times-fold increase in the number of companies publishing blockchain-related posts.

Brother Lian Education go all-in-one and Blockchain training courses are unique, structured courses developed by Tsinghua, Microsoft, and Google teachers over the course of a half-year period.

Compress files

Package Main

Import (

"FMT"

"OS"

"IO"

"Archive/tar"

"Compress/gzip"

)

Func Main () {

File Write

FW, ERR: = OS. Create ("tar/lin_golang_src.tar.gz")

If err! = Nil {

Panic (ERR)

}

Defer FW. Close ()

Gzip Write

GW: = gzip. Newwriter (FW)

Defer GW. Close ()

Tar Write

TW: = tar. Newwriter (GW)

Defer TW. Close ()

Open Folder

Dir, err: = OS. Open ("file/")

If err! = Nil {

Panic (Nil)

}

Defer dir. Close ()

Read a list of files

FIS, err: = dir. Readdir (0)

If err! = Nil {

Panic (ERR)

}

Traverse file List

For _, Fi: = Range fis {

Escape the folder, I will not be recursive here

If Fi. Isdir () {

Continue

}

Print file name

Fmt. Println (FI. Name ())

Open File

FR, err: = OS. Open (dir. Name () + "/" + FI. Name ())

If err! = Nil {

Panic (ERR)

}

Defer Fr. Close ()

Information header

H: = new (tar. Header)

H.name = fi. Name ()

H.size = fi. Size ()

H.mode = Int64 (FI. Mode ())

H.modtime = fi. Modtime ()

Write message header

Err = tw. Writeheader (h)

If err! = Nil {

Panic (ERR)

}

Write a file

_, err = Io. Copy (TW, FR)

If err! = Nil {

Panic (ERR)

}

}

Fmt. Println ("tar.gz OK")

}

Unzip the file

Package Main

Import (

"FMT"

"OS"

"IO"

"Time"

"Archive/tar"

"Compress/gzip"

)

Func Main () {

File read

FR, err: = OS. Open ("tar/lin_golang_src.tar.gz")

If err! = Nil {

Panic (ERR)

}

Defer Fr. Close ()

Gzip Read

GR, err: = gzip. Newreader (FR)

If err! = Nil {

Panic (ERR)

}

Defer Gr. Close ()

Tar read

TR: = tar. Newreader (GR)

Read file

for {

H, err: = tr. Next ()

If err = = Io. EOF {

Break

}

If err! = Nil {

Panic (ERR)

}

Show Files

Fmt. Println (H.name)

Open File

FW, ERR: = OS. OpenFile ("file2/" + h.name, os. O_create | Os. O_wronly, 0644/*os. FileMode (H.mode) */)

If err! = Nil {

Panic (ERR)

}

Defer FW. Close ()

Write a file

_, err = Io. Copy (FW, TR)

If err! = Nil {

Panic (ERR)

}

}

Fmt. Println ("Un tar.gz OK")

}