| from __future__ import print_function |
| import os |
| import re |
| from urlparse import parse_qs |
| |
| def parse_range(header_value, file_size): |
| if header_value is None: |
| # HTTP Range header range end is inclusive |
| return 0, file_size - 1 |
| |
| match = re.match("bytes=(\d*)-(\d*)", header_value) |
| start = int(match.group(1)) if match.group(1).strip() != "" else 0 |
| last = int(match.group(2)) if match.group(2).strip() != "" else file_size - 1 |
| return start, last |
| |
| def main(request, response): |
| file_extension = parse_qs(request.url_parts.query)["extension"][0] |
| with open("media/movie_300." + file_extension, "rb") as f: |
| f.seek(0, os.SEEK_END) |
| file_size = f.tell() |
| |
| range_header = request.headers.get("range") |
| req_start, req_last = parse_range(range_header, file_size) |
| f.seek(req_start, os.SEEK_SET) |
| |
| response.add_required_headers = False |
| response.writer.write_status(206 if range_header else 200) |
| response.writer.write_header("Accept-Ranges", "bytes") |
| response.writer.write_header("Content-Type", "video/mp4") |
| if range_header: |
| response.writer.write_header("Content-Range", "bytes %d-%d/%d" % |
| (req_start, req_last, file_size)) |
| response.writer.write_header("Content-Length", str(req_last - req_start + 1)) |
| response.writer.end_headers() |
| |
| gap_start = int(file_size * 0.5) |
| gap_last = int(file_size * 0.95) |
| |
| if gap_start < req_start < gap_last: |
| # If the start position is part of the gap, don't send any data |
| return |
| |
| if req_start < gap_start: |
| # If the position is before of the gap, only send data until the |
| # gap is reached |
| req_last = min(req_last, gap_start) |
| |
| size = req_last - req_start + 1 |
| response.writer.write(f.read(size)) |
