forked from GoesToEleven/GolangTraining
/
email.go
59 lines (54 loc) · 1.14 KB
/
email.go
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package twitter
import (
"encoding/base64"
"io"
"io/ioutil"
"mime"
"mime/multipart"
"strings"
"golang.org/x/net/context"
)
func parseFile(ctx context.Context, mme, enc string, reader io.Reader) (string, error) {
mediatype, params, err := mime.ParseMediaType(mme)
ret := ""
if err != nil {
return "", err
}
switch mediatype {
case "multipart/alternative":
rdr := multipart.NewReader(reader, params["boundary"])
for {
part, err := rdr.NextPart()
if err == io.EOF {
break
} else if err != nil {
return "", err
}
newMime := part.Header.Get("Content-Type")
if !strings.HasPrefix(newMime, "text/plain") {
continue
}
encoding := part.Header.Get("Content-Transfer-Encoding")
ret, err = parseFile(ctx, newMime, encoding, part)
if err != nil {
return "", err
}
}
case "text/plain":
if enc == "base64" {
dcode := base64.NewDecoder(base64.StdEncoding, reader)
bts, err := ioutil.ReadAll(dcode)
if err != nil {
return "", err
}
ret = string(bts)
} else {
bts, err := ioutil.ReadAll(reader)
if err != nil {
return "", err
}
ret = string(bts)
}
}
return ret, nil
}