зеркало из https://github.com/microsoft/docker.git
113 строки
2.4 KiB
Go
113 строки
2.4 KiB
Go
package utils
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import (
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"encoding/json"
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"fmt"
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"io"
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)
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type StreamFormatter struct {
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json bool
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}
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func NewStreamFormatter(json bool) *StreamFormatter {
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return &StreamFormatter{json}
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}
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const streamNewline = "\r\n"
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var streamNewlineBytes = []byte(streamNewline)
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func (sf *StreamFormatter) FormatStream(str string) []byte {
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if sf.json {
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b, err := json.Marshal(&JSONMessage{Stream: str})
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if err != nil {
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return sf.FormatError(err)
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}
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return append(b, streamNewlineBytes...)
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}
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return []byte(str + "\r")
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}
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func (sf *StreamFormatter) FormatStatus(id, format string, a ...interface{}) []byte {
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str := fmt.Sprintf(format, a...)
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if sf.json {
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b, err := json.Marshal(&JSONMessage{ID: id, Status: str})
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if err != nil {
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return sf.FormatError(err)
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}
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return append(b, streamNewlineBytes...)
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}
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return []byte(str + streamNewline)
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}
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func (sf *StreamFormatter) FormatError(err error) []byte {
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if sf.json {
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jsonError, ok := err.(*JSONError)
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if !ok {
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jsonError = &JSONError{Message: err.Error()}
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}
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if b, err := json.Marshal(&JSONMessage{Error: jsonError, ErrorMessage: err.Error()}); err == nil {
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return append(b, streamNewlineBytes...)
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}
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return []byte("{\"error\":\"format error\"}" + streamNewline)
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}
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return []byte("Error: " + err.Error() + streamNewline)
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}
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func (sf *StreamFormatter) FormatProgress(id, action string, progress *JSONProgress) []byte {
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if progress == nil {
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progress = &JSONProgress{}
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}
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if sf.json {
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b, err := json.Marshal(&JSONMessage{
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Status: action,
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ProgressMessage: progress.String(),
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Progress: progress,
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ID: id,
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})
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if err != nil {
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return nil
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}
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return b
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}
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endl := "\r"
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if progress.String() == "" {
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endl += "\n"
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}
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return []byte(action + " " + progress.String() + endl)
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}
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func (sf *StreamFormatter) Json() bool {
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return sf.json
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}
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type StdoutFormater struct {
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io.Writer
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*StreamFormatter
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}
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func (sf *StdoutFormater) Write(buf []byte) (int, error) {
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formattedBuf := sf.StreamFormatter.FormatStream(string(buf))
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n, err := sf.Writer.Write(formattedBuf)
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if n != len(formattedBuf) {
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return n, io.ErrShortWrite
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}
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return len(buf), err
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}
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type StderrFormater struct {
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io.Writer
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*StreamFormatter
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}
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func (sf *StderrFormater) Write(buf []byte) (int, error) {
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formattedBuf := sf.StreamFormatter.FormatStream("\033[91m" + string(buf) + "\033[0m")
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n, err := sf.Writer.Write(formattedBuf)
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if n != len(formattedBuf) {
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return n, io.ErrShortWrite
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}
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return len(buf), err
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}
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