mozilla-central/__GENERATED__/dist/xpcrs/rt/nsIChannelEventSink.rs

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//
// DO NOT EDIT. THIS FILE IS GENERATED FROM $SRCDIR/netwerk/base/nsIChannelEventSink.idl
//
/// `interface nsIChannelEventSink : nsISupports`
///
/// ```text
/// /**
/// * Implement this interface to receive control over various channel events.
/// * Channels will try to get this interface from a channel's
/// * notificationCallbacks or, if not available there, from the loadGroup's
/// * notificationCallbacks.
/// *
/// * These methods are called before onStartRequest.
/// */
/// ```
///
// The actual type definition for the interface. This struct has methods
// declared on it which will call through its vtable. You never want to pass
// this type around by value, always pass it behind a reference.
#[repr(C)]
pub struct nsIChannelEventSink {
vtable: &'static nsIChannelEventSinkVTable,
/// This field is a phantomdata to ensure that the VTable type and any
/// struct containing it is not safe to send across threads by default, as
/// XPCOM is generally not threadsafe.
///
/// If this type is marked as [rust_sync], there will be explicit `Send` and
/// `Sync` implementations on this type, which will override the inherited
/// negative impls from `Rc`.
__nosync: ::std::marker::PhantomData<::std::rc::Rc<u8>>,
// Make the rust compiler aware that there might be interior mutability
// in what actually implements the interface. This works around UB
// that a rust lint would make blatantly obvious, but doesn't exist.
// This prevents optimizations, but those optimizations weren't available
// before rustc switched to LLVM 16, and they now cause problems because
// of the UB.
// Until there's a lint available to find all our UB, it's simpler to
// avoid the UB in the first place, at the cost of preventing optimizations
// in places that don't cause UB. But again, those optimizations weren't
// available before.
__maybe_interior_mutability: ::std::cell::UnsafeCell<[u8; 0]>,
}
// Implementing XpCom for an interface exposes its IID, which allows for easy
// use of the `.query_interface<T>` helper method. This also defines that
// method for nsIChannelEventSink.
unsafe impl XpCom for nsIChannelEventSink {
const IID: nsIID = nsID(0x0197720d, 0x37ed, 0x4e75,
[0x89, 0x56, 0xd0, 0xd2, 0x96, 0xe4, 0xd8, 0xa6]);
}
// We need to implement the RefCounted trait so we can be used with `RefPtr`.
// This trait teaches `RefPtr` how to manage our memory.
unsafe impl RefCounted for nsIChannelEventSink {
#[inline]
unsafe fn addref(&self) {
self.AddRef();
}
#[inline]
unsafe fn release(&self) {
self.Release();
}
}
// This trait is implemented on all types which can be coerced to from nsIChannelEventSink.
// It is used in the implementation of `fn coerce<T>`. We hide it from the
// documentation, because it clutters it up a lot.
#[doc(hidden)]
pub trait nsIChannelEventSinkCoerce {
/// Cheaply cast a value of this type from a `nsIChannelEventSink`.
fn coerce_from(v: &nsIChannelEventSink) -> &Self;
}
// The trivial implementation: We can obviously coerce ourselves to ourselves.
impl nsIChannelEventSinkCoerce for nsIChannelEventSink {
#[inline]
fn coerce_from(v: &nsIChannelEventSink) -> &Self {
v
}
}
impl nsIChannelEventSink {
/// Cast this `nsIChannelEventSink` to one of its base interfaces.
#[inline]
pub fn coerce<T: nsIChannelEventSinkCoerce>(&self) -> &T {
T::coerce_from(self)
}
}
// Every interface struct type implements `Deref` to its base interface. This
// causes methods on the base interfaces to be directly avaliable on the
// object. For example, you can call `.AddRef` or `.QueryInterface` directly
// on any interface which inherits from `nsISupports`.
impl ::std::ops::Deref for nsIChannelEventSink {
type Target = nsISupports;
#[inline]
fn deref(&self) -> &nsISupports {
unsafe {
::std::mem::transmute(self)
}
}
}
// Ensure we can use .coerce() to cast to our base types as well. Any type which
// our base interface can coerce from should be coercable from us as well.
impl<T: nsISupportsCoerce> nsIChannelEventSinkCoerce for T {
#[inline]
fn coerce_from(v: &nsIChannelEventSink) -> &Self {
T::coerce_from(v)
}
}
// This struct represents the interface's VTable. A pointer to a statically
// allocated version of this struct is at the beginning of every nsIChannelEventSink
// object. It contains one pointer field for each method in the interface. In
// the case where we can't generate a binding for a method, we include a void
// pointer.
#[doc(hidden)]
#[repr(C)]
pub struct nsIChannelEventSinkVTable {
/// We need to include the members from the base interface's vtable at the start
/// of the VTable definition.
pub __base: nsISupportsVTable,
/* void asyncOnChannelRedirect (in nsIChannel oldChannel, in nsIChannel newChannel, in unsigned long flags, in nsIAsyncVerifyRedirectCallback callback); */
pub AsyncOnChannelRedirect: unsafe extern "system" fn (this: *const nsIChannelEventSink, oldChannel: *const nsIChannel, newChannel: *const nsIChannel, flags: u32, callback: *const nsIAsyncVerifyRedirectCallback) -> ::nserror::nsresult,
}
// The implementations of the function wrappers which are exposed to rust code.
// Call these methods rather than manually calling through the VTable struct.
impl nsIChannelEventSink {
/// ```text
/// /**
/// * This is a temporary redirect. New requests for this resource should
/// * continue to use the URI of the old channel.
/// *
/// * The new URI may be identical to the old one.
/// */
/// ```
///
pub const REDIRECT_TEMPORARY: u32 = 1;
/// ```text
/// /**
/// * This is a permanent redirect. New requests for this resource should use
/// * the URI of the new channel (This might be an HTTP 301 reponse).
/// * If this flag is not set, this is a temporary redirect.
/// *
/// * The new URI may be identical to the old one.
/// */
/// ```
///
pub const REDIRECT_PERMANENT: u32 = 2;
/// ```text
/// /**
/// * This is an internal redirect, i.e. it was not initiated by the remote
/// * server, but is specific to the channel implementation.
/// *
/// * The new URI may be identical to the old one.
/// */
/// ```
///
pub const REDIRECT_INTERNAL: u32 = 4;
/// ```text
/// /**
/// * This is a special-cased redirect coming from hitting HSTS upgrade
/// * redirect from http to https only. In some cases this type of redirect
/// * may be considered as safe despite not being the-same-origin redirect.
/// */
/// ```
///
pub const REDIRECT_STS_UPGRADE: u32 = 8;
/// ```text
/// /**
/// * This is a internal redirect used to handle http authentication retries.
/// * Upon receiving a 401 or 407 the channel gets redirected to a new channel
/// * (same URL) that performs the request with the appropriate credentials.
/// * Auth retry to the server must be made after redirecting to a new channel
/// */
/// ```
///
pub const REDIRECT_AUTH_RETRY: u32 = 16;
/// ```text
/// /**
/// * Called when a redirect occurs. This may happen due to an HTTP 3xx status
/// * code. The purpose of this method is to notify the sink that a redirect
/// * is about to happen, but also to give the sink the right to veto the
/// * redirect by throwing or passing a failure-code in the callback.
/// *
/// * Note that vetoing the redirect simply means that |newChannel| will not
/// * be opened. It is important to understand that |oldChannel| will continue
/// * loading as if it received a HTTP 200, which includes notifying observers
/// * and possibly display or process content attached to the HTTP response.
/// * If the sink wants to prevent this loading it must explicitly deal with
/// * it, e.g. by calling |oldChannel->Cancel()|
/// *
/// * There is a certain freedom in implementing this method:
/// *
/// * If the return-value indicates success, a callback on |callback| is
/// * required. This callback can be done from within asyncOnChannelRedirect
/// * (effectively making the call synchronous) or at some point later
/// * (making the call asynchronous). Repeat: A callback must be done
/// * if this method returns successfully.
/// *
/// * If the return value indicates error (method throws an exception)
/// * the redirect is vetoed and no callback must be done. Repeat: No
/// * callback must be done if this method throws!
/// *
/// * NOTE: originalURI isn't yet set on the new channel when
/// * asyncOnChannelRedirect is called.
/// *
/// * @see nsIAsyncVerifyRedirectCallback::onRedirectVerifyCallback()
/// *
/// * @param oldChannel
/// * The channel that's being redirected.
/// * @param newChannel
/// * The new channel. This channel is not opened yet.
/// * @param flags
/// * Flags indicating the type of redirect. A bitmask consisting
/// * of flags from above.
/// * One of REDIRECT_TEMPORARY and REDIRECT_PERMANENT will always be
/// * set.
/// * @param callback
/// * Object to inform about the async result of this method
/// *
/// * @throw <any> Throwing an exception will cause the redirect to be
/// * cancelled
/// */
/// ```
///
/// `void asyncOnChannelRedirect (in nsIChannel oldChannel, in nsIChannel newChannel, in unsigned long flags, in nsIAsyncVerifyRedirectCallback callback);`
#[inline]
pub unsafe fn AsyncOnChannelRedirect(&self, oldChannel: *const nsIChannel, newChannel: *const nsIChannel, flags: u32, callback: *const nsIAsyncVerifyRedirectCallback) -> ::nserror::nsresult {
((*self.vtable).AsyncOnChannelRedirect)(self, oldChannel, newChannel, flags, callback)
}
}