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main.go
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main.go
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package main
import (
"bytes"
"compress/gzip"
"encoding/base64"
"encoding/csv"
"io"
"log"
"os"
)
func main() {
f, err := os.Open("fcc.csv")
if err != nil {
log.Fatal(err)
}
defer f.Close()
err = CSVToCZ64(f, os.Stdout)
if err != nil {
log.Fatal(err)
}
}
func CSVToCZ64(in io.Reader, out io.Writer) error {
r := csv.NewReader(in)
for {
var csvbuf, gzbuf, b64buf bytes.Buffer
w := csv.NewWriter(&csvbuf)
gw, err := gzip.NewWriterLevel(&gzbuf, gzip.BestCompression)
if err != nil {
return err
}
record, err := r.Read()
if err == io.EOF {
break
}
if err != nil {
return err
}
err = w.Write(record)
if err != nil {
return err
}
w.Flush()
_, err = gw.Write(csvbuf.Bytes())
if err != nil {
return err
}
gw.Flush()
encoder := base64.NewEncoder(base64.StdEncoding, &b64buf)
_, err = encoder.Write(gzbuf.Bytes())
if err != nil {
return err
}
encoder.Close()
_, err = out.Write(b64buf.Bytes())
if err != nil {
return err
}
out.Write([]byte("\n"))
}
return nil
}