本文整理汇总了Python中pyramid.response.Response.headers["X-Expected-Content-Length"]方法的典型用法代码示例。如果您正苦于以下问题：Python Response.headers["X-Expected-Content-Length"]方法的具体用法？Python Response.headers["X-Expected-Content-Length"]怎么用？Python Response.headers["X-Expected-Content-Length"]使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类pyramid.response.Response的用法示例。
在下文中一共展示了Response.headers["X-Expected-Content-Length"]方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: file
# 需要导入模块: from pyramid.response import Response [as 别名]
# 或者: from pyramid.response.Response import headers["X-Expected-Content-Length"] [as 别名]
def file(request):
"""
HTTP standard does not allow us to respond with 206/Partial Content with unknown range length,
so we'll just implement download resuming our own way.
When necessary, getting content_offset from Range request header can be done like this:
content_offset = None
if request.range is not None:
if request.range.start > 0 and request.range.end is None:
content_offset = request.range.start
And responding can be done like this:
content_length = NotImplemented
if content_offset is not None:
response.content_length = content_length - content_offset + 1
response.content_range = ContentRange(content_offset, content_length, content_length)
response.status_code = 206
"""
path = file_path_for_serving(request)
if file_can_be_transfered_directly(path):
f = open(path)
expected_length = os.path.getsize(path)
else:
f = IncompleteFile(convert_file_path(request))
d = os.path.dirname(f.path)
if not os.path.exists(d):
os.makedirs(d)
stdout, stderr = subprocess.Popen(["/usr/bin/avconv", "-i", path], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()
m_duration = re.search("Duration: ([0-9:.]+),", stderr)
if m_duration:
[h, m, s] = m_duration.group(1).split(":")
[s, ms] = s.split(".")
expected_length = ((int(h) * 3600 + int(m) * 60 + int(s)) * 1000 + int(ms) * 10) * (BITRATE * 1024) / 8 / 1000
else:
expected_length = None
if not os.path.exists(f.path):
def avconv_thread():
while True:
code = subprocess.call([
"/usr/bin/avconv", "-i", path,
"-acodec", "libmp3lame", "-ab", "%dk" % BITRATE, "-ar", "44100", "-f", "mp3",
"-y", f.path
])
if code == 0:
break
f.set_completed()
threading.Thread(target=avconv_thread).start()
content_offset = int(request.GET.get("content_offset", 0))
if content_offset > 0:
f.read(content_offset)
def app_iter():
for data in iter(lambda: f.read(8192), ""):
yield data
f.close()
response = Response()
response.app_iter = app_iter()
if expected_length:
response.headers["X-Expected-Content-Length"] = str(expected_length)
return response