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96834da0a2
* remove Downloader.download_to_data/download_to_filename/download_to_filehandle * remove download.Data/FileName/FileHandle targets * remove filenode.download/download_to_data/download_to_filename methods * leave Downloader.download (the whole Downloader will go away eventually) * add util.consumer.MemoryConsumer/download_to_data, for convenience (this is mostly used by unit tests, but it gets used by enough non-test code to warrant putting it in allmydata.util) * update tests * removes about 180 lines of code. Yay negative code days! Overall plan is to rewrite immutable/download.py and leave filenode.read() as the sole read-side API.
31 lines
918 B
Python
Executable File
31 lines
918 B
Python
Executable File
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"""This file defines a basic download-to-memory consumer, suitable for use in
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a filenode's read() method. See download_to_data() for an example of its use.
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"""
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from zope.interface import implements
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from twisted.internet.interfaces import IConsumer
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class MemoryConsumer:
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implements(IConsumer)
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def __init__(self):
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self.chunks = []
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self.done = False
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def registerProducer(self, p, streaming):
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self.producer = p
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if streaming:
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# call resumeProducing once to start things off
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p.resumeProducing()
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else:
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while not self.done:
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p.resumeProducing()
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def write(self, data):
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self.chunks.append(data)
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def unregisterProducer(self):
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self.done = True
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def download_to_data(n, offset=0, size=None):
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d = n.read(MemoryConsumer(), offset, size)
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d.addCallback(lambda mc: "".join(mc.chunks))
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return d
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