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This refactor is driven by the following (ultimate) aims:
- Get rid of as much of the custom stream code in mime4cl which makes
less code to maintain in the future.
- Lay the groundwork for correct handling of 8bit transfer encoding:
The mime4cl we inherited assumes that any MIME message can be decoded
completely by the CL implementation (in SBCL's case using latin1)
into CHARACTERs. This is not necessarily the case. flexi-streams
allows changing how the stream is decoded on the fly and also has
support for reading the underlying bytes which is perfect for the
requirements decoding MIME has.
- Since flexi-streams uses trivial-gray-streams, it supports
READ-SEQUENCE. Taking advantage of this may improve decoding
performance significantly in the future.
This incurs the following changes:
- Naturally we now open given files as binary files in MIME-MESSAGE.
Given strings are encoded using STRING-TO-OCTETS and then passed on
to a new octet vector method. Instead of MY-STRING-INPUT-STREAM this
now uses flexi-streams' WITH-INPUT-FROM-SEQUENCE.
- OPEN-FILE-PORTION and OPEN-DECODED-FILE-PORTION need to be merged,
since the transfer encoding not only implies an extra decoder stream
that needs to be attached after file portion stream, but also imply a
certain encoding of the stream itself (mostly binary vs. ASCII).
As flexi-streams can change their encoding on the fly this could be
untangled again, but it is not strictly necessary.
As before, we use the DATA slot of the file portion to create a fresh
stream if possible. Instead of strings we now use an vector of octets
to match MIME-MESSAGE.
The actual portioned stream relies on POSITIONED-FLEXI-INPUT-STREAM, a
subclass of the stock FLEXI-INPUT-STREAM class, described below.
- POSITIONED-FLEXI-INPUT-STREAM replaces DELIMITED-INPUT-STREAM. It is
created using MAKE-POSITIONED-FLEXI-INPUT-STREAM which accepts the
same arguments as MAKE-FLEXI-STREAMS and, additionally, :IGNORE-CLOSE.
A POSITIONED-FLEXI-INPUT-STREAM works the same as an
FLEXI-INPUT-STREAM, but upon creation, the underlying stream is
rewinded or forwarded to the argument given by :POSITION using
FILE-POSITION.
If :IGNORE-CLOSE is T, a call to CLOSE is not forwarded to the
underlying stream.
Change-Id: I2d48c769bb110ca0b7cf52441bd63c1e1c2ccd04
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8559
Reviewed-by: sterni <sternenseemann@systemli.org>
Autosubmit: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
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This makes sure that initializing coder-stream-mixin (for the most part)
has the same interface as initializing qbase64:decode-stream. This will
make integrating that as a faster replacement to
mime4cl:base64-decoder-stream a bit easier.
The idea is to replace the char by char base64 decoder with one that
supports read-sequence. After that deliminited-input-stream needs to
gain support for read-sequence as well, so we can actually take
advantage of this fact. Finally, we'll have to evaluate the remaining
decoders and think about switching the (base64) encoders over as well.
Change-Id: If971da02437506e00a7c9fab2b94efc42725e62d
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8555
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Autosubmit: sterni <sternenseemann@systemli.org>
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By computing the amount the stream position advanced we can save a
syscall on every read which speeds up mime:mime-body-stream by /a lot/,
e.g. extracting a ~3MB attachment drops from over 15s to under ~0.5s.
There's still a lot to be gained and correctness left to be desired
which can be addressed as described in the newly added comment.
Change-Id: I5e1dfd213aac41203f271cf220db456dfb95a02b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5073
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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Having #+cmu all over the place suggests that we maintain CMUCL support
or test with CMUCL which is not the case.
Change-Id: Ia0828cb1ac48e49acdee6fef7a0fa2c04c1805b3
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5068
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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This should be a net positive for portability and lets us drop some of
the CMUCL cruft (which we don't test anyway, CMU support may have
regressed regardless).
Change-Id: I85664d82d211177da1db9eebea65c956295b09f7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5067
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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Done using
find third_party/lisp/{sclf,mime4cl,npg} \
-name '*.lisp' -or -name '*.asd' \
-exec bash -c 'expand -i -t 8 "$0" | sponge "$0"' {} \;
Change-Id: If84afac9c1d5cbc74e137a5aa0ae61472f0f1e90
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5066
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
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The following changes are required to make mime4cl build:
* file-position doesn't like to be called with NIL as the position
argument, so we have to make sure to not do that in
stream-file-position. My workaround is a bit clunky, but works.
* Tests discover the sample file via relative path resolution. This
doesn't work when they are imported into the nix store as individual
files. Instead we make use of the fact that DEFVAR is a no-op if the
variable is already defined and inject a file via the nix build that
sets the relevant ones. For the path to sample1.msg, we need to create
a new variable.
Change-Id: I74eeda7bf2c2a4f64cc2b90e72081513ec3285d5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3270
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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Used http://wcp.sdf-eu.org/software/mime4cl-20150207T211851.tbz (sha256
5a914669bba7561efe59a4fd0817204c07ad2add98b03ae206ef185ac04affb3).
Importing seems sensible since there's no upstream repo nor has their
been a release since 2015.
This is just an import commit, so the changes made to make it build are
more discoverable as their own commit.
Change-Id: I2ff28c3c7433abdf7857204bc89eaf9edc0b1cbc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3378
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
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