Struct rocket::form::ValueField

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pub struct ValueField<'r> {
    pub name: NameView<'r>,
    pub value: &'r str,
}
Expand description

A form field with a string value.

Rocket preprocesses all form fields into either ValueFields or DataFields. All fields from url-encoded forms, and fields without Content-Types from multipart forms, are preprocessed as a ValueField.

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§name: NameView<'r>

The (decoded) name of the form field.

§value: &'r str

The (decoded) value of the form field.

Implementations§

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impl<'v> ValueField<'v>

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pub fn parse(field: &'v str) -> Self

Parse a field string, where both the key and value are assumed to be URL-decoded while preserving the = delimiter, into a ValueField.

This implements 3.2, 3.3 of section 5.1 of the WHATWG living standard.

§Example
use rocket::form::ValueField;

let parsed = ValueField::parse("a cat=an A+ pet");
assert_eq!(parsed.name, "a cat");
assert_eq!(parsed.value, "an A+ pet");

let parsed = ValueField::parse("a cat is an A+ pet");
assert_eq!(parsed.name, "a cat is an A+ pet");
assert_eq!(parsed.value, "");

let parsed = ValueField::parse("cat.food=yum?");
assert_eq!(parsed.name, "cat");
assert_eq!(parsed.name.source(), "cat.food");
assert_eq!(parsed.value, "yum?");
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pub fn from_value(value: &'v str) -> Self

Create a ValueField from a value, which is assumed to be URL-decoded. The field name will be empty.

This is equivalent to ValueField::from(("", value)). To create a ValueField from both a name and a value, use ValueField::from((name, value)).

§Example
use rocket::form::ValueField;

let parsed = ValueField::from_value("A+=kitten");
assert_eq!(parsed.name, "");
assert_eq!(parsed.value, "A+=kitten");
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pub fn shift(self) -> Self

Shift the name of self and return self with the shifted name.

See NameView::shift() for the details on name “shifting”.

§Example
use rocket::form::ValueField;

let parsed = ValueField::parse("cat.food=yum?");
assert_eq!(parsed.name, "cat");
assert_eq!(parsed.name.source(), "cat.food");
assert_eq!(parsed.name.key_lossy(), "cat");

let shifted = parsed.shift();
assert_eq!(shifted.name, "cat.food");
assert_eq!(shifted.name.key_lossy(), "food");
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pub fn unexpected(&self) -> Error<'v>

Creates a complete unexpected value field Error from self.

The error will have the following properties:

§Example
use rocket::form::ValueField;
use rocket::form::error::{ErrorKind, Entity};

let field = ValueField::parse("cat.food=yum?");
let error = field.unexpected();

assert_eq!(error.name.as_ref().unwrap(), "cat.food");
assert_eq!(error.value.as_ref().unwrap(), "yum?");
assert_eq!(error.kind, ErrorKind::Unexpected);
assert_eq!(error.entity, Entity::ValueField);
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pub fn missing(&self) -> Error<'v>

Creates a complete missing value field Error from self.

The error will have the following properties:

§Example
use rocket::form::ValueField;
use rocket::form::error::{ErrorKind, Entity};

let field = ValueField::parse("cat.food=yum?");
let error = field.missing();

assert_eq!(error.name.as_ref().unwrap(), "cat.food");
assert_eq!(error.value.as_ref().unwrap(), "yum?");
assert_eq!(error.kind, ErrorKind::Missing);
assert_eq!(error.entity, Entity::ValueField);

Trait Implementations§

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impl<'r> Clone for ValueField<'r>

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fn clone(&self) -> ValueField<'r>

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'r> Debug for ValueField<'r>

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

Formats the value using the given formatter. Read more
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impl<'a> From<(&'a str, &'a str)> for ValueField<'a>

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fn from((name, value): (&'a str, &'a str)) -> Self

Converts to this type from the input type.
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impl<'a, 'b> PartialEq<ValueField<'b>> for ValueField<'a>

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fn eq(&self, other: &ValueField<'b>) -> bool

This method tests for self and other values to be equal, and is used by ==.
1.0.0 · source§

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.

Auto Trait Implementations§

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impl<'r> Freeze for ValueField<'r>

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impl<'r> RefUnwindSafe for ValueField<'r>

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impl<'r> Send for ValueField<'r>

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impl<'r> Sync for ValueField<'r>

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impl<'r> Unpin for ValueField<'r>

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impl<'r> UnwindSafe for ValueField<'r>

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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fn explicit(self, class: Class, tag: u32) -> TaggedParser<'a, Explicit, Self, E>

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fn implicit( self, class: Class, constructed: bool, tag: u32 ) -> TaggedParser<'a, Implicit, Self, E>

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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fn from(t: T) -> T

Returns the argument unchanged.

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Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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