Struct NEFilterFlow

Source

#[repr(C)]
pub struct NEFilterFlow { /* private fields */ }

Expand description

The NEFilterFlow class declares the programmatic interface of an object that represents a flow of network data to be filtered.

NEFilterFlow is part of NetworkExtension.framework

Implementations§

Source §

impl NEFilterFlow

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pub unsafe fn URL(&self) -> Option<Retained<NSURL>>

The flow’s HTTP request URL. Will be nil if the flow did not originate from WebKit.

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pub unsafe fn sourceAppUniqueIdentifier(&self) -> Option<Retained<NSData>>

A byte string that uniquely identifies the binary for each build of the source application of the flow.

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pub unsafe fn sourceAppIdentifier(&self) -> Option<Retained<NSString>>

A string containing the identifier of the source application of the flow. This identifier stays the same for all versions and builds of the application. This identifier is unique among all applications.

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pub unsafe fn sourceAppVersion(&self) -> Option<Retained<NSString>>

The short version string of the source application. Will be nil if the app info is unavailable.

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pub unsafe fn direction(&self) -> NETrafficDirection

Initial direction of the flow (outgoing or incoming flow)

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pub unsafe fn sourceAppAuditToken(&self) -> Option<Retained<NSData>>

Audit token of the source application of the flow.

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pub unsafe fn sourceProcessAuditToken(&self) -> Option<Retained<NSData>>

The audit token of the process that created the flow. In cases where the connection was created by a system process on behalf of the source application, sourceProcessAuditToken will be different from sourceAppAuditToken and will contain the audit token of the system process. In cases where the source application directly created the connection sourceAppAuditToken and sourceProcessAuditToken will be identical.

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pub unsafe fn identifier(&self) -> Retained<NSUUID>

The unique identifier of the flow.

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impl NEFilterFlow

Methods declared on superclass NSObject.

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pub unsafe fn init(this: Allocated<Self>) -> Retained<Self>

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pub unsafe fn new() -> Retained<Self>

Methods from Deref<Target = NSObject>§

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pub fn doesNotRecognizeSelector(&self, sel: Sel) -> !

Handle messages the object doesn’t recognize.

See Apple’s documentation for details.

Methods from Deref<Target = AnyObject>§

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pub fn class(&self) -> &'static AnyClass

Dynamically find the class of this object.

§Panics

May panic if the object is invalid (which may be the case for objects returned from unavailable init/new methods).

§Example

Check that an instance of NSObject has the precise class NSObject.

use objc2::ClassType;
use objc2::runtime::NSObject;

let obj = NSObject::new();
assert_eq!(obj.class(), NSObject::class());

Source

pub unsafe fn get_ivar<T>(&self, name: &str) -> &T
where T: Encode,

👎Deprecated: this is difficult to use correctly, use Ivar::load instead.

Use Ivar::load instead.

§Safety

The object must have an instance variable with the given name, and it must be of type T.

See Ivar::load_ptr for details surrounding this.

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pub fn downcast_ref<T>(&self) -> Option<&T>
where T: DowncastTarget,

Attempt to downcast the object to a class of type T.

This is the reference-variant. Use Retained::downcast if you want to convert a retained object to another type.

§Mutable classes

Some classes have immutable and mutable variants, such as NSString and NSMutableString.

When some Objective-C API signature says it gives you an immutable class, it generally expects you to not mutate that, even though it may technically be mutable “under the hood”.

So using this method to convert a NSString to a NSMutableString, while not unsound, is generally frowned upon unless you created the string yourself, or the API explicitly documents the string to be mutable.

See Apple’s documentation on mutability and on isKindOfClass: for more details.

§Generic classes

Objective-C generics are called “lightweight generics”, and that’s because they aren’t exposed in the runtime. This makes it impossible to safely downcast to generic collections, so this is disallowed by this method.

You can, however, safely downcast to generic collections where all the type-parameters are AnyObject.

§Panics

This works internally by calling isKindOfClass:. That means that the object must have the instance method of that name, and an exception will be thrown (if CoreFoundation is linked) or the process will abort if that is not the case. In the vast majority of cases, you don’t need to worry about this, since both root objects NSObject and NSProxy implement this method.

§Examples

Cast an NSString back and forth from NSObject.

use objc2::rc::Retained;
use objc2_foundation::{NSObject, NSString};

let obj: Retained<NSObject> = NSString::new().into_super();
let string = obj.downcast_ref::<NSString>().unwrap();
// Or with `downcast`, if we do not need the object afterwards
let string = obj.downcast::<NSString>().unwrap();

Try (and fail) to cast an NSObject to an NSString.

use objc2_foundation::{NSObject, NSString};

let obj = NSObject::new();
assert!(obj.downcast_ref::<NSString>().is_none());

Try to cast to an array of strings.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);
// This is invalid and doesn't type check.
let arr = arr.downcast_ref::<NSArray<NSString>>();

This fails to compile, since it would require enumerating over the array to ensure that each element is of the desired type, which is a performance pitfall.

Downcast when processing each element instead.

use objc2_foundation::{NSArray, NSObject, NSString};

let arr = NSArray::from_retained_slice(&[NSObject::new()]);

for elem in arr {
    if let Some(data) = elem.downcast_ref::<NSString>() {
        // handle `data`
    }
}