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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))
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