dotcloud/docker

package remotecontext // import "github.com/docker/docker/builder/remotecontext"

import (
    "mime"
    "net/http"
)

// MIME content types.
const (
    mimeTypeTextPlain   = "text/plain"
    mimeTypeOctetStream = "application/octet-stream"
)

// detectContentType returns a best guess representation of the MIME
// content type for the bytes at c.  The value detected by
// http.DetectContentType is guaranteed not be nil, defaulting to
// application/octet-stream when a better guess cannot be made. The
// result of this detection is then run through mime.ParseMediaType()
// which separates the actual MIME string from any parameters.
func detectContentType(c []byte) (string, error) {
    contentType, _, err := mime.ParseMediaType(http.DetectContentType(c))
    if err != nil {
        return "", err
    }
    return contentType, nil
}