func readFile(filePath string) (string, error) {
var buf []byte
var err error
var n int
var writer *flate.Writer
var encoder io.WriteCloser
var file *os.File
var data *bytes.Buffer = new(bytes.Buffer)
if file, err = os.Open(filePath); err != nil {
return "", err
}
defer file.Close()
encoder = ascii85.NewEncoder(data)
defer encoder.Close()
writer, err = flate.NewWriter(encoder, flate.BestCompression)
defer writer.Close()
buf = make([]byte, 8192)
err = nil
for {
if n, err = file.Read(buf); err != nil {
if err == io.EOF {
break
} else {
return "", err
}
}
if n == 8192 {
_, err = writer.Write(buf)
} else {
_, err = writer.Write(buf[:n])
}
if err != nil {
return "", err
}
}
if err = writer.Flush(); err != nil {
return "", err
}
return strconv.Quote(string(data.Bytes())), nil
}
