forked from emersion/go-imap
/
bodystructure.go
60 lines (48 loc) · 1.25 KB
/
bodystructure.go
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package backendutil
import (
"io"
"strings"
"github.com/emersion/go-imap"
"github.com/emersion/go-message"
)
// FetchBodyStructure computes a message's body structure from its content.
func FetchBodyStructure(e *message.Entity, extended bool) (*imap.BodyStructure, error) {
bs := new(imap.BodyStructure)
mediaType, mediaParams, _ := e.Header.ContentType()
typeParts := strings.SplitN(mediaType, "/", 2)
bs.MIMEType = typeParts[0]
if len(typeParts) == 2 {
bs.MIMESubType = typeParts[1]
}
bs.Params = mediaParams
bs.Id = e.Header.Get("Content-Id")
bs.Description = e.Header.Get("Content-Description")
bs.Encoding = e.Header.Get("Content-Encoding")
// TODO: bs.Size
if mr := e.MultipartReader(); mr != nil {
var parts []*imap.BodyStructure
for {
p, err := mr.NextPart()
if err == io.EOF {
break
} else if err != nil {
return nil, err
}
pbs, err := FetchBodyStructure(p, extended)
if err != nil {
return nil, err
}
parts = append(parts, pbs)
}
bs.Parts = parts
}
// TODO: bs.Envelope, bs.BodyStructure
// TODO: bs.Lines
if extended {
bs.Extended = true
bs.Disposition, bs.DispositionParams, _ = e.Header.ContentDisposition()
// TODO: bs.Language, bs.Location
// TODO: bs.MD5
}
return bs, nil
}