testing/web-platform/tests/element-timing/resources/progressive-image.py

   1 import os.path
   2 import time
   3
   4 from wptserve.utils import isomorphic_encode
   5
   6 def main(request, response):
   7     name = request.GET.first(b"name")
   8     sleepTime = float(request.GET.first(b"sleep")) / 1E3
   9     numInitial = int(request.GET.first(b"numInitial"))
  10
  11     path = os.path.join(os.path.dirname(isomorphic_encode(__file__)), name)
  12     body = open(path, u"rb").read()
  13
  14     response.headers.set(b"Content-Type", b"image")
  15     response.headers.set(b"Content-Length", len(body))
  16     response.headers.set(b"Cache-control", b"no-cache, must-revalidate")
  17     response.write_status_headers()
  18
  19     # Read from the beginning, |numInitial| bytes.
  20     first = body[:numInitial]
  21     response.writer.write_content(first)
  22
  23     time.sleep(sleepTime)
  24
  25     # Read the remainder after having slept.
  26     second = body[numInitial:]
  27     response.writer.write_content(second)