controller_trackview.py 文件源码

def download():
    trackrels = request.query.tracks.split('|')

    # write the archive into a temporary in-memory file-like object
    temp = tempfile.SpooledTemporaryFile()
    with zipfile.ZipFile(temp, 'w', zipfile.ZIP_DEFLATED) as archive:
        for trackrel in trackrels:
            base_wildcard = trackrel.replace("-track.csv", "*")
            paths = config.TRACKDIR.glob(base_wildcard)
            for path in paths:
                archive.write(str(path),
                              str(path.relative_to(config.TRACKDIR))
                              )

    temp.seek(0)

    # force a download; give it a filename and mime type
    response.set_header('Content-Disposition', 'attachment; filename="data.zip"')
    response.set_header('Content-Type', 'application/zip')

    # relying on garbage collector to delete tempfile object
    # (and hence the file itself) when done sending
    return temp