From: Brian Warner Date: Wed, 23 May 2007 18:18:49 +0000 (-0700) Subject: change uri-packer-unpacker to deal with dictionaries, not fragile tuples X-Git-Tag: allmydata-tahoe-0.3.0~73 X-Git-Url: https://git.rkrishnan.org/pf/content/de.html?a=commitdiff_plain;h=05163ec8e1353ada943b67fda75ed6e5ed0fcbf7;p=tahoe-lafs%2Ftahoe-lafs.git change uri-packer-unpacker to deal with dictionaries, not fragile tuples --- diff --git a/src/allmydata/download.py b/src/allmydata/download.py index 656c8ecb..02b79547 100644 --- a/src/allmydata/download.py +++ b/src/allmydata/download.py @@ -214,17 +214,21 @@ class FileDownloader: def __init__(self, client, uri, downloadable): self._client = client self._downloadable = downloadable - (codec_name, codec_params, tail_codec_params, verifierid, fileid, key, roothash, needed_shares, total_shares, size, segment_size) = unpack_uri(uri) + + d = unpack_uri(uri) + verifierid = d['verifierid'] + size = d['size'] + segment_size = d['segment_size'] assert isinstance(verifierid, str) assert len(verifierid) == 20 self._verifierid = verifierid - self._fileid = fileid - self._roothash = roothash + self._fileid = d['fileid'] + self._roothash = d['roothash'] - self._codec = codec.get_decoder_by_name(codec_name) - self._codec.set_serialized_params(codec_params) - self._tail_codec = codec.get_decoder_by_name(codec_name) - self._tail_codec.set_serialized_params(tail_codec_params) + self._codec = codec.get_decoder_by_name(d['codec_name']) + self._codec.set_serialized_params(d['codec_params']) + self._tail_codec = codec.get_decoder_by_name(d['codec_name']) + self._tail_codec.set_serialized_params(d['tail_codec_params']) self._total_segments = mathutil.div_ceil(size, segment_size) @@ -233,10 +237,10 @@ class FileDownloader: self._size = size self._num_needed_shares = self._codec.get_needed_shares() - self._output = Output(downloadable, key) + self._output = Output(downloadable, d['key']) - self._share_hashtree = hashtree.IncompleteHashTree(total_shares) - self._share_hashtree.set_hashes({0: roothash}) + self._share_hashtree = hashtree.IncompleteHashTree(d['total_shares']) + self._share_hashtree.set_hashes({0: self._roothash}) self.active_buckets = {} # k: shnum, v: bucket self._share_buckets = {} # k: shnum, v: set of buckets diff --git a/src/allmydata/test/test_system.py b/src/allmydata/test/test_system.py index e692c771..81aa91bc 100644 --- a/src/allmydata/test/test_system.py +++ b/src/allmydata/test/test_system.py @@ -212,11 +212,10 @@ class SystemTest(testutil.SignalMixin, unittest.TestCase): def mangle_uri(self, gooduri): # change the verifierid, which means we'll be asking about the wrong # file, so nobody will have any shares - pieces = list(uri.unpack_uri(gooduri)) - # [3] is the verifierid - assert len(pieces[3]) == 20 - pieces[3] = self.flip_bit(pieces[3]) - return uri.pack_uri(*pieces) + d = uri.unpack_uri(gooduri) + assert len(d['verifierid']) == 20 + d['verifierid'] = self.flip_bit(d['verifierid']) + return uri.pack_uri(**d) # TODO: add a test which mangles the fileid instead, and should fail in # the post-download phase when the file's integrity check fails. Do the diff --git a/src/allmydata/test/test_upload.py b/src/allmydata/test/test_upload.py index 383462ae..efae86d4 100644 --- a/src/allmydata/test/test_upload.py +++ b/src/allmydata/test/test_upload.py @@ -24,14 +24,14 @@ class GoodServer(unittest.TestCase): def _check(self, uri): self.failUnless(isinstance(uri, str)) self.failUnless(uri.startswith("URI:")) - codec_name, codec_params, tail_codec_params, verifierid, fileid, key, roothash, needed_shares, total_shares, size, segment_size = unpack_uri(uri) - self.failUnless(isinstance(verifierid, str)) - self.failUnlessEqual(len(verifierid), 20) - self.failUnless(isinstance(fileid, str)) - self.failUnlessEqual(len(fileid), 20) - self.failUnless(isinstance(key, str)) - self.failUnlessEqual(len(key), 16) - self.failUnless(isinstance(codec_params, str)) + d = unpack_uri(uri) + self.failUnless(isinstance(d['verifierid'], str)) + self.failUnlessEqual(len(d['verifierid']), 20) + self.failUnless(isinstance(d['fileid'], str)) + self.failUnlessEqual(len(d['fileid']), 20) + self.failUnless(isinstance(d['key'], str)) + self.failUnlessEqual(len(d['key']), 16) + self.failUnless(isinstance(d['codec_params'], str)) def testData(self): data = "This is some data to upload" diff --git a/src/allmydata/uri.py b/src/allmydata/uri.py index 356e409b..96fca1da 100644 --- a/src/allmydata/uri.py +++ b/src/allmydata/uri.py @@ -8,6 +8,7 @@ from allmydata.util import idlib def pack_uri(codec_name, codec_params, tail_codec_params, verifierid, fileid, key, roothash, needed_shares, total_shares, size, segment_size): + # applications should pass keyword parameters into this assert isinstance(codec_name, str) assert len(codec_name) < 10 assert ":" not in codec_name @@ -26,15 +27,17 @@ def pack_uri(codec_name, codec_params, tail_codec_params, def unpack_uri(uri): assert uri.startswith("URI:") - header, codec_name, codec_params, tail_codec_params, verifierid_s, fileid_s, key_s, roothash_s, needed_shares_s, total_shares_s, size_s, segment_size_s = uri.split(":") - verifierid = idlib.a2b(verifierid_s) - fileid = idlib.a2b(fileid_s) - key = idlib.a2b(key_s) - roothash = idlib.a2b(roothash_s) - needed_shares = int(needed_shares_s) - total_shares = int(total_shares_s) - size = int(size_s) - segment_size = int(segment_size_s) - return codec_name, codec_params, tail_codec_params, verifierid, fileid, key, roothash, needed_shares, total_shares, size, segment_size + d = {} + header, d['codec_name'], d['codec_params'], d['tail_codec_params'], verifierid_s, fileid_s, key_s, roothash_s, needed_shares_s, total_shares_s, size_s, segment_size_s = uri.split(":") + assert header == "URI" + d['verifierid'] = idlib.a2b(verifierid_s) + d['fileid'] = idlib.a2b(fileid_s) + d['key'] = idlib.a2b(key_s) + d['roothash'] = idlib.a2b(roothash_s) + d['needed_shares'] = int(needed_shares_s) + d['total_shares'] = int(total_shares_s) + d['size'] = int(size_s) + d['segment_size'] = int(segment_size_s) + return d diff --git a/src/allmydata/webish.py b/src/allmydata/webish.py index 5275b0de..687d63bf 100644 --- a/src/allmydata/webish.py +++ b/src/allmydata/webish.py @@ -128,8 +128,7 @@ class Directory(rend.Page): ctx.fillSlots("uri", T.a(href=dl_uri_url)[html.escape(uri)]) #extract and display file size - unpacked = unpack_uri(uri) - ctx.fillSlots("size", unpacked[9]) + ctx.fillSlots("size", unpack_uri(uri)['size']) # this creates a button which will cause our child__delete method # to be invoked, which deletes the file and then redirects the