rama::http::headers

Struct Upgrade

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pub struct Upgrade(/* private fields */);
Expand description

Upgrade header, defined in RFC7230

The Upgrade header field is intended to provide a simple mechanism for transitioning from HTTP/1.1 to some other protocol on the same connection. A client MAY send a list of protocols in the Upgrade header field of a request to invite the server to switch to one or more of those protocols, in order of descending preference, before sending the final response. A server MAY ignore a received Upgrade header field if it wishes to continue using the current protocol on that connection. Upgrade cannot be used to insist on a protocol change.

§ABNF

Upgrade          = 1#protocol

protocol         = protocol-name ["/" protocol-version]
protocol-name    = token
protocol-version = token

§Example values

  • HTTP/2.0, SHTTP/1.3, IRC/6.9, RTA/x11

§Note

In practice, the Upgrade header is never that complicated. In most cases, it is only ever a single value, such as "websocket".

§Examples

use headers::Upgrade;

let ws = Upgrade::websocket();

Implementations§

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impl Upgrade

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pub fn websocket() -> Upgrade

Constructs an Upgrade: websocket header.

Trait Implementations§

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impl Clone for Upgrade

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fn clone(&self) -> Upgrade

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 Upgrade

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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 Header for Upgrade

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fn name() -> &'static HeaderName

The name of this header.
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fn decode<'i, I>(values: &mut I) -> Result<Upgrade, Error>
where I: Iterator<Item = &'i HeaderValue>,

Decode this type from an iterator of HeaderValues.
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fn encode<E>(&self, values: &mut E)
where E: Extend<HeaderValue>,

Encode this type to a HeaderMap. Read more
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impl PartialEq for Upgrade

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fn eq(&self, other: &Upgrade) -> bool

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl StructuralPartialEq for Upgrade

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Encode this Header to HeaderValue.
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