allmydata.util.log.err() either takes a Failure as the first positional
argument, or takes no positional arguments and must be invoked in an
exception handler. Fixed its signature to match both foolscap.logging.log.err
and twisted.python.log.err . Included a brief unit test.
Stop checking separately for ConnectionDone/ConnectionLost, since those have
been folded into DeadReferenceError since foolscap-0.3.1 . Write
rrefutil.trap_deadref() in terms of rrefutil.trap_and_discard() to improve
code coverage.
Verifier misses
The results (described in #819) match our expectations: it misses corruption
in unused share fields and in most container fields (which are only visible
to the storage server, not the client). 1265 bytes of a 2753 byte
share (hosting a 56-byte file with an artifically small segment size) are
unused, mostly in the unused tail of the overallocated UEB space (765 bytes),
and the allocated-but-unwritten plaintext_hash_tree (480 bytes).
instead of weird errors. Closes#874 and #786.
Previously, if the file had 0 shares, this would raise TypeError as it tried
to call download_version(None). If the file had some shares but fewer than
'k', it would incorrectly raise MustForceRepairError.
Added get_successful() to the IRepairResults API, to give repair() a place to
report non-code-bug problems like this.
Mutable servermap updates and the immutable checker, when run with
add_lease=True, send both the do-you-have-block and add-lease commands in
parallel, to avoid an extra round trip time. Many older servers have problems
with add-lease and raise various exceptions, which don't generally matter.
The client-side code was catching+ignoring some of them, but unrecognized
exceptions were passed through to the DYHB code, concealing the DYHB results
from the checker, making it think the server had no shares.
The fix is to separate the code paths. Both commands are sent at the same
time, but the errback path from add-lease is handled separately. Known
exceptions are ignored, the others (both unknown-remote and all-local) are
logged (log.WEIRD, which will trigger an Incident), but neither will affect
the DYHB results.
The add-lease message is sent first, and we know that the server handles them
synchronously. So when the checker is done, we can be sure that all the
add-lease messages have been retired. This makes life easier for unit tests.
web/filenode.py: also serve edge metadata when using t=json on a
DIRCAP/childname object.
tahoe_ls.py: list file objects as if we were listing one-entry directories.
Show edge metadata if we have it, which will be true when doing
'tahoe ls DIRCAP/filename' and false when doing 'tahoe ls
FILECAP'
This forbids operations that would implicitly create a directory with a
zero-length (empty string) name, like what you'd get if you did "tahoe put
local /oops/blah" (#358) or "POST /uri/CAP//?t=mkdir" (#676). The error
message is fairly friendly too.
Also added code to "tahoe put" to catch this error beforehand and suggest the
correct syntax (i.e. without the leading slash).
The webapi has been looking for an Accept header since 1.4.0, but it treats a
missing header as equal to */* (to honor RFC2616). This change finally
modifies our CLI tools to ask for "text/plain, application/octet-stream",
which seems roughly correct (we either want a plain-text traceback or error
message, or an uninterpreted chunk of binary data to save to disk). Some day
we'll figure out how JSON fits into this scheme.
* 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.
* backups now share dirnodes with any previous backup, in any location,
so renames and moves are handled very efficiently
* "tahoe backup" no longer bothers reading the previous snapshot
* if you switch grids, you should delete ~/.tahoe/private/backupdb.sqlite,
to force new uploads of all files and directories
The proper hierarchy is:
IFilesystemNode
+IFileNode
++IMutableFileNode
++IImmutableFileNode
+IDirectoryNode
Also expand test_client.py (NodeMaker) to hit all IFilesystemNode types.
* stop caching most_recent_size in dirnode, rely upon backing filenode for it
* start caching most_recent_size in MutableFileNode
* return None when you don't know, not "?"
* only render None as "?" in the web "more info" page
* add get_size/get_current_size to UnknownNode
* change t=mkdir-with-children to not use multipart/form encoding. Instead,
the request body is all JSON. t=mkdir-immutable uses this format too.
* make nodemaker.create_immutable_dirnode() get convergence from SecretHolder,
but let callers override it
* raise NotDeepImmutableError instead of using assert()
* add mutable= argument to DirectoryNode.create_subdirectory(), default True
* "cap" means a python instance which encapsulates a filecap/dircap (uri.py)
* "uri" means a string with a "URI:" prefix
* FileNode instances are created with (and retain) a cap instance, and
generate uri strings on demand
* .get_cap/get_readcap/get_verifycap/get_repaircap return cap instances
* .get_uri/get_readonly_uri return uri strings
* add filenode.download_to_filename() for control.py, should find a better way
* use MutableFileNode.init_from_cap, not .init_from_uri
* directory URI instances: use get_filenode_cap, not get_filenode_uri
* update/cleanup bench_dirnode.py to match, add Makefile target to run it
This is safer: in the earlier API, an old webapi server would silently ignore
the initial children, and clients trying to set them would have to fetch the
newly-created directory to discover the incompatibility. In the new API,
clients using t=mkdir-with-children against an old webapi server will get a
clear error.
instead of creating an empty file and then adding the children later.
This should speed up mkdir(initial_children) considerably, removing two
roundtrips and an entire read-modify-write cycle, probably bringing it down
to a single roundtrip. A quick test (against the volunteergrid) suggests a
30% speedup.
test_dirnode: add new tests to enforce the restrictions that interfaces.py
claims for create_new_mutable_directory(): no UnknownNodes, metadata dicts
interfaces.py: define INodeMaker, document argument values, change
create_new_mutable_directory() to take dict-of-nodes. Change
dirnode.set_nodes() and dirnode.create_subdirectory() too.
nodemaker.py: use INodeMaker, update create_new_mutable_directory()
client.py: have create_dirnode() delegate initial_children= to nodemaker
dirnode.py (Adder): take dict-of-nodes instead of list-of-nodes, which
updates set_nodes() and create_subdirectory()
web/common.py (convert_initial_children_json): create dict-of-nodes
web/directory.py: same
web/unlinked.py: same
test_dirnode.py: update tests to match
