pub struct ContentType(pub Mime);
Expand description

Content-Type header, defined in RFC 7231 §3.1.1.5

The Content-Type header field indicates the media type of the associated representation: either the representation enclosed in the message payload or the selected representation, as determined by the message semantics. The indicated media type defines both the data format and how that data is intended to be processed by a recipient, within the scope of the received message semantics, after any content codings indicated by Content-Encoding are decoded.

Although the mime crate allows the mime options to be any slice, this crate forces the use of Vec. This is to make sure the same header can’t have more than 1 type. If this is an issue, it’s possible to implement Header on a custom struct.

ABNF

Content-Type = media-type

Example Values

  • text/html; charset=utf-8
  • application/json

Examples

use actix_web::HttpResponse;
use actix_web::http::header::ContentType;

let mut builder = HttpResponse::Ok();
builder.insert_header(
    ContentType::json()
);
use actix_web::HttpResponse;
use actix_web::http::header::ContentType;

let mut builder = HttpResponse::Ok();
builder.insert_header(
    ContentType(mime::TEXT_HTML)
);

Tuple Fields§

§0: Mime

Implementations§

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impl ContentType

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pub fn json() -> ContentType

A constructor to easily create a Content-Type: application/json header.

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pub fn plaintext() -> ContentType

A constructor to easily create a Content-Type: text/plain; charset=utf-8 header.

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pub fn html() -> ContentType

A constructor to easily create a Content-Type: text/html; charset=utf-8 header.

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pub fn xml() -> ContentType

A constructor to easily create a Content-Type: text/xml header.

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pub fn form_url_encoded() -> ContentType

A constructor to easily create a Content-Type: application/www-form-url-encoded header.

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pub fn jpeg() -> ContentType

A constructor to easily create a Content-Type: image/jpeg header.

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pub fn png() -> ContentType

A constructor to easily create a Content-Type: image/png header.

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pub fn octet_stream() -> ContentType

A constructor to easily create a Content-Type: application/octet-stream header.

Methods from Deref<Target = Mime>§

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pub fn type_(&self) -> Name<'_>

Get the top level media type for this Mime.

Example
let mime = mime::TEXT_PLAIN;
assert_eq!(mime.type_(), "text");
assert_eq!(mime.type_(), mime::TEXT);
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pub fn subtype(&self) -> Name<'_>

Get the subtype of this Mime.

Example
let mime = mime::TEXT_PLAIN;
assert_eq!(mime.subtype(), "plain");
assert_eq!(mime.subtype(), mime::PLAIN);
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pub fn suffix(&self) -> Option<Name<'_>>

Get an optional +suffix for this Mime.

Example
let svg = "image/svg+xml".parse::<mime::Mime>().unwrap();
assert_eq!(svg.suffix(), Some(mime::XML));
assert_eq!(svg.suffix().unwrap(), "xml");


assert!(mime::TEXT_PLAIN.suffix().is_none());
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pub fn get_param<'a, N>(&'a self, attr: N) -> Option<Name<'a>>where N: PartialEq<Name<'a>>,

Look up a parameter by name.

Example
let mime = mime::TEXT_PLAIN_UTF_8;
assert_eq!(mime.get_param(mime::CHARSET), Some(mime::UTF_8));
assert_eq!(mime.get_param("charset").unwrap(), "utf-8");
assert!(mime.get_param("boundary").is_none());

let mime = "multipart/form-data; boundary=ABCDEFG".parse::<mime::Mime>().unwrap();
assert_eq!(mime.get_param(mime::BOUNDARY).unwrap(), "ABCDEFG");
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pub fn params<'a>(&'a self) -> Params<'a>

Returns an iterator over the parameters.

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pub fn essence_str(&self) -> &str

Return a &str of the Mime’s “essence”.

Trait Implementations§

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impl Clone for ContentType

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fn clone(&self) -> ContentType

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 Debug for ContentType

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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 Deref for ContentType

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type Target = Mime

The resulting type after dereferencing.
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fn deref(&self) -> &Self::Target

Dereferences the value.
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impl DerefMut for ContentType

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fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.
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impl Display for ContentType

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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 Header for ContentType

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fn name() -> HeaderName

Returns the name of the header field.
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fn parse<M: HttpMessage>(msg: &M) -> Result<Self, ParseError>

Parse the header from a HTTP message.
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impl PartialEq<ContentType> for ContentType

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fn eq(&self, other: &ContentType) -> 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 TryIntoHeaderValue for ContentType

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type Error = InvalidHeaderValue

The type returned in the event of a conversion error.
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fn try_into_value(self) -> Result<HeaderValue, Self::Error>

Try to convert value to a HeaderValue.
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impl Eq for ContentType

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impl StructuralEq for ContentType

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impl StructuralPartialEq for ContentType

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere 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> Borrow<T> for Twhere 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 Twhere 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 Qwhere 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 Qwhere 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 Twhere 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> Same<T> for T

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type Output = T

Should always be Self
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impl<T> ToOwned for Twhere T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T> ToString for Twhere 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 Twhere 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 Twhere 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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impl<T> TryIntoHeaderPair for Twhere T: Header,

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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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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>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more