Struct kvarn::prelude::utils::parse::Query

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pub struct Query<'a> { /* private fields */ }
Expand description

A set of QueryPairs, parsed from a query.

This is a multimap (one to many relation between keys and values) struct. A query can have multiple values per name. If we always use the first or last value of a name in a query, subtle exploits slip in. You have to make a explicit choice of what to do in this implementation.

Note that the order of the names in the Display implementation may be in the right order.

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impl<'a> Query<'a>

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pub fn get_all(&self, name: &'a str) -> QueryPairIter<'_>

Returns a iterator of all values with name.

Don’t use this to get the first or last item; you’ll get the same drawbacks as Self::get_first and Self::get_last.

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pub fn get(&self, name: &'a str) -> Option<&QueryPair<'_>>

Returns the value of name. This is the recommended method to get a QueryPair.

Note that this can return None even if name is present in the query.

If there exists multiple values associated with a name, None is returned.

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pub fn get_first(&self, name: &'a str) -> Option<&QueryPair<'_>>

Gets the first value of name in the query. Consider using Self::get instead, as it eliminates risks for query attacks.

Watch this Youtube video to see how it can be exploited.

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pub fn get_last(&self, name: &'a str) -> Option<&QueryPair<'_>>

Gets the last value of name in the query. Consider using Self::get instead, as it eliminates risks for query attacks.

Watch this Youtube video to see how it can be exploited.

Trait Implementations§

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impl<'a> Debug for Query<'a>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl<'a> Display for Query<'a>

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fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter. Read more
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impl<'a> PartialEq for Query<'a>

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fn eq(&self, other: &Query<'a>) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl<'a> Eq for Query<'a>

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impl<'a> StructuralPartialEq for Query<'a>

Auto Trait Implementations§

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impl<'a> Freeze for Query<'a>

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impl<'a> RefUnwindSafe for Query<'a>

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impl<'a> Send for Query<'a>

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impl<'a> Sync for Query<'a>

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impl<'a> Unpin for Query<'a>

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impl<'a> UnwindSafe for Query<'a>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> AsCleanDebug for T
where T: Display,

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fn as_clean(&self) -> CleanDebug<'_, Self>
where Self: Display,

Get a CleanDebug for Self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Checks if this value is equivalent to the given key. Read more
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impl<Q, K> Equivalent<K> for Q
where Q: Eq + ?Sized, K: Borrow<Q> + ?Sized,

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fn equivalent(&self, key: &K) -> bool

Compare self to key and return true if they are equal.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Pointable for T

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const ALIGN: usize = _

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToCompactString for T
where T: Display,

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fn to_compact_string(&self) -> CompactString

Converts the given value to a CompactString. Read more
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impl<T> ToString for T
where T: Display + ?Sized,

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default fn to_string(&self) -> String

Converts the given value to a String. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

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