本文整理汇总了Python中xml.etree.cElementTree.XML.findtext方法的典型用法代码示例。如果您正苦于以下问题：Python XML.findtext方法的具体用法？Python XML.findtext怎么用？Python XML.findtext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xml.etree.cElementTree.XML的用法示例。
在下文中一共展示了XML.findtext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: fetch
# 需要导入模块: from xml.etree.cElementTree import XML [as 别名]
# 或者: from xml.etree.cElementTree.XML import findtext [as 别名]
def fetch(*pos, dest_file, quiet=False, frontend=None, abort=None, **kw):
url = manifest_url(*pos, **kw)
if not quiet:
print(url, file=stderr)
with PersistentConnectionHandler() as connection:
session = urllib.request.build_opener(connection)
with session.open(url) as response:
manifest = response.read()
manifest = XML(manifest)
# TODO: this should be determined from bootstrap info presumably
(frags, _) = manifest.findtext(F4M_NAMESPACE + "duration").split(".")
frags = (int(frags) + 2) // 3
# TODO: determine preferred bitrate, max bitrate, etc
media = manifest.find(F4M_NAMESPACE + "media") # Just pick the first one!
player = player_verification(manifest)
if not quiet:
print(player, file=stderr)
media_url = media.get("url")
metadata = media.findtext(F4M_NAMESPACE + "metadata")
metadata = b64decode(metadata.encode("ascii"), validate=True)
with open(dest_file, "wb") as flv:
flv.write(bytes.fromhex("464C560105000000090000000012"))
flv.write(len(metadata).to_bytes(3, "big"))
flv.write(bytes(3 + 4))
flv.write(metadata)
flv.write(bytes.fromhex("00019209"))
for frag in range(frags):
frag += 1
frag_url = "{}Seg1-Frag{}?{}".format(media_url, frag, player)
frag_url = urljoin(url, frag_url)
try:
response = session.open(frag_url)
except HTTPError as err:
if err.code != http.client.NOT_FOUND:
raise
# Relying on requests for fragments after the final
# fragment to return 404 "Not found" errors
break
while True:
boxsize = response.read(4)
if not boxsize:
break
boxtype = response.read(4)
assert len(boxsize) == 4 and len(boxtype) == 4
boxsize = int.from_bytes(boxsize, "big")
if boxsize == 1:
boxsize = response.read(8)
assert len(boxsize) == 8
boxsize = int.from_bytes(boxsize, "big")
boxsize -= 16
else:
boxsize -= 8
assert boxsize >= 0
if boxtype == b"mdat":
if frag > 1:
for _ in range(2):
streamcopy(response, null_writer, 1,
abort=abort)
packetsize = response.read(3)
assert len(packetsize) == 3
packetsize = int.from_bytes(packetsize, "big")
packetsize += 11 + 4
streamcopy(response, null_writer,
packetsize - 4, abort=abort)
boxsize -= packetsize
assert boxsize >= 0
streamcopy(response, flv, boxsize, abort=abort)
else:
streamcopy(response, null_writer, boxsize,
abort=abort)
size = flv.tell()
if frontend:
frontend.set_size(size)
else:
stderr.write("\rFrag {}; {:.1F} MB\r".format(frag, size / 1e6))
stderr.flush()
else:
if not frontend:
print(file=stderr)
msg = "Fragment number would exceeded {}".format(frags)
raise NotImplementedError(msg)
if not frontend:
print(file=stderr)