- 1 year ago
How to output the output data of `exec.Command` without broken characters
When using the exec.Command
function in Go to execute a command and capture its output, you may encounter broken characters or encoding issues when displaying the output. To ensure that the output data is displayed correctly, you need to handle the character encoding properly.
Here's an example of how to capture and display the output data without broken characters in Go:
gopackage main
import (
"fmt"
"os/exec"
"os"
"bytes"
"io"
"strings"
)
func main() {
cmd := exec.Command("your_command", "arg1", "arg2")
var stdout bytes.Buffer
var stderr bytes.Buffer
cmd.Stdout = &stdout
cmd.Stderr = &stderr
err := cmd.Run()
if err != nil {
fmt.Println("Error:", err)
os.Exit(1)
}
// Convert output bytes to string using proper encoding
stdoutStr := decodeOutput(stdout.Bytes())
stderrStr := decodeOutput(stderr.Bytes())
fmt.Println("Standard Output:")
fmt.Println(stdoutStr)
fmt.Println("Standard Error:")
fmt.Println(stderrStr)
}
func decodeOutput(data []byte) string {
buf := bytes.NewBuffer(nil)
decoder := mahonia.NewDecoder("UTF-8")
reader := strings.NewReader(string(data))
decodedReader := decoder.NewReader(reader)
io.Copy(buf, decodedReader)
return buf.String()
}
In this example, the decodeOutput
function uses the mahonia
library to decode the output bytes using the UTF-8 encoding. You can install the mahonia
package using go get github.com/axgle/mahonia
.
By properly decoding the output data using the correct encoding, you can ensure that the characters are displayed correctly without any broken or garbled characters.
Note that you may need to adjust the encoding and decoding logic depending on the specific encoding used by the output data of your executed command. The example assumes the output is UTF-8 encoded, but you can change it to match the actual encoding if necessary.