Is there a way to write a byte array to a file? I have the file name and file extension(like temp.xml).
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1How to read/write from/to file?icza– icza2015-09-21 05:51:11 +00:00Commented Sep 21, 2015 at 5:51
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2 Answers
Sounds like you just want the ioutil.WriteFile function from the standard library.
https://golang.org/pkg/io/ioutil/#WriteFile
It would look something like this:
permissions := 0644 // or whatever you need
byteArray := []byte("to be written to a file\n")
err := ioutil.WriteFile("file.txt", byteArray, permissions)
if err != nil {
// handle error
}
1 Comment
Prithvi Boinpally
ioutil.WriteFile() has been replaced by os.WriteFile, and permissions are no longer an int, and can be passed in directly as the octal code. E.g.
err = os.WriteFile("file.txt", byteArray, 0666)According to https://golang.org/pkg/io/ioutil/#WriteFile, as of Go 1.16 this function is deprecated. Use https://pkg.go.dev/os#WriteFile instead (ioutil.WriteFile simply calls os.WriteFile as of 1.16).
Otherwise, Jeffrey Martinez's answer remains correct:
permissions := 0644 // or whatever you need
byteArray := []byte("to be written to a file\n")
err := os.WriteFile("file.txt", byteArray, permissions)
if err != nil {
// handle error
}
1 Comment
Prithvi Boinpally
I believe permissions would be assigned an int type which would throw an error when passed to os.WriteFile() (which expects perms to be an fs.FileMode). Permissions are now stated directly in the function call.