This URL library ends up being a relatively fundamental base library of
the system, as LibCore depends on LibURL.
This change has two main benefits:
* Moving AK back more towards being an agnostic library that can
be used between the kernel and userspace. URL has never really fit
that description - and is not used in the kernel.
* URL _should_ depend on LibUnicode, as it needs punnycode support.
However, it's not really possible to do this inside of AK as it can't
depend on any external library. This change brings us a little closer
to being able to do that, but unfortunately we aren't there quite
yet, as the code generators depend on LibCore.
Along with putting functions in the URL namespace into a DOMURL
namespace.
This is done as LibWeb is in an awkward situation where it needs
two URL classes. AK::URL is the general purpose URL class which
is all that is needed in 95% of cases. URL in the Web namespace
is needed predominantly for interfacing with the javascript
interfaces.
Because of two URLs in the same namespace, AK::URL has had to be
used throughout LibWeb. If we move AK::URL into a URL namespace,
this becomes more painful - where ::URL::URL is required to
specify the constructor (and something like
::URL::create_with_url_or_path in other places).
To fix this problem - rename the class in LibWeb implementing the
URL IDL interface to DOMURL, along with moving the other Web URL
related classes into this DOMURL folder.
One could argue that this name also makes the situation a little
more clear in LibWeb for why these two URL classes need be used
in the first place.
With this change, we now have ~1200 CellAllocators across both LibJS and
LibWeb in a normal WebContent instance.
This gives us a minimum heap size of 4.7 MiB in the scenario where we
only have one cell allocated per type. Of course, in practice there will
be many more of each type, so the effective overhead is quite a bit
smaller than that in practice.
I left a few types unconverted to this mechanism because I got tired of
doing this. :^)
Stop worrying about tiny OOMs. Work towards #20449.
While going through these, I also changed the function signature in many
places where returning ThrowCompletionOr<T> is no longer necessary.
This does not implement extra functionality on top of the basic parser,
but allows multiple places in LibWeb to call the 'correct' interface for
when it is fully implemented.
This makes Fetch rely less on using main_thread_vm().current_realm(),
which relies on the dummy execution context if no JavaScript is
currently running.
The majority of error strings are StringView literals, and it seems
silly to require heap-allocating strings for these.
This idea is stolen from a recent change in fd1fbad :^)
Previously, parsing failures and the header not existing made
extract_header_list_values return an empty Optional, making it
impossible to differentiate between the two.
Required for implementing CORS-preflight, where parsing failures for
the headers makes it fail, but not having them doesn't make it fail in
all cases.
Move the macro to LibJS and change it to return a throw completion
instead of a WebIDL exception. This will let us use this macro within
LibJS to handle OOM conditions.
We have a new, improved string type coming up in AK (OOM aware, no null
state), and while it's going to use UTF-8, the name UTF8String is a
mouthful - so let's free up the String name by renaming the existing
class.
Making the old one have an annoying name will hopefully also help with
quick adoption :^)
This implements the following operations from section 4 of the Fetch
spec (https://fetch.spec.whatwg.org/#fetching):
- Fetch
- Main fetch
- Fetch response handover
- Scheme fetch
- HTTP fetch
- HTTP-redirect fetch
- HTTP-network-or-cache fetch (without caching)
It does *not* implement:
- HTTP-network fetch
- CORS-preflight fetch
Instead, we let ResourceLoader handle the actual networking for now,
which isn't ideal, but certainly enough to get enough functionality up
and running for most websites to not complain.
There will be a lot of different cases where we'll return an error
response, and having a customized Promise rejection message seems quite
useful.
Note that this has to be distinct from the existing 'status message',
which is required to be empty in those cases.
This is the way.
On a more serious note, there's no reason to keep adding ref-counted
classes to LibWeb now that the majority of classes is GC'd - it only
adds the risk of discovering some cycle down the line, and forces us to
use handles as we can't visit().
With the addition of the 'fetch params' struct, the single ownership
model we had so far falls apart completely.
Additionally, this works nicely for FilteredResponse's internal response
instead of risking a dangling reference.
Replacing the public constructor with a create() function also found a
few instances of a Request being stack-allocated!
This is needed to eventually share a header list between a Request or
Response object's internal infra request/response and the object's
exposed Header object.
A Request/Response instance should always be heap-allocated and have
clear ownership, so let's also wrap it in a NonnullOwnPtr instead of
putting them on the stack.
The Fetch spec unfortunately will cause a name clash between the Request
concept and the Request JS object - both cannot live in the Web::Fetch
namespace, and WrapperGenerator generally assumes `Web::<Name>` for
things living in the `<Name>/` subdirectory, so let's instead move infra
code into its own namespace - it already sits in a (sub-)subdirectory
anyway.
