Struct Builder

pub struct Builder { /* private fields */ }

An HTTP response builder

This type can be used to construct an instance of Response through a builder-like pattern.

Implementations

impl Builder

pub fn new() -> Builder

Creates a new default instance of Builder to construct either a Head or a Response.

Examples

let response = response::Builder::new()
    .status(200)
    .body(())
    .unwrap();

pub fn status<T>(self, status: T) -> Builder

where StatusCode: TryFrom<T>, <StatusCode as TryFrom<T>>::Error: Into<Error>,

Set the HTTP status for this response.

By default this is 200.

Examples

let response = Response::builder()
    .status(200)
    .body(())
    .unwrap();

pub fn version(self, version: Version) -> Builder

Set the HTTP version for this response.

By default this is HTTP/1.1

Examples

let response = Response::builder()
    .version(Version::HTTP_2)
    .body(())
    .unwrap();

pub fn header<K, V>(self, key: K, value: V) -> Builder

where HeaderName: TryFrom<K>, <HeaderName as TryFrom<K>>::Error: Into<Error>, HeaderValue: TryFrom<V>, <HeaderValue as TryFrom<V>>::Error: Into<Error>,

Appends a header to this response builder.

This function will append the provided key/value as a header to the internal HeaderMap being constructed. Essentially this is equivalent to calling HeaderMap::append.

Examples

let response = Response::builder()
    .header("Content-Type", "text/html")
    .header("X-Custom-Foo", "bar")
    .header("content-length", 0)
    .body(())
    .unwrap();

pub fn headers_ref(&self) -> Option<&HeaderMap>

Get header on this response builder.

When builder has error returns None.

Example

let res = Response::builder()
    .header("Accept", "text/html")
    .header("X-Custom-Foo", "bar");
let headers = res.headers_ref().unwrap();
assert_eq!( headers["Accept"], "text/html" );
assert_eq!( headers["X-Custom-Foo"], "bar" );

pub fn headers_mut(&mut self) -> Option<&mut HeaderMap>

Get header on this response builder. when builder has error returns None

Example

let mut res = Response::builder();
{
  let headers = res.headers_mut().unwrap();
  headers.insert("Accept", HeaderValue::from_static("text/html"));
  headers.insert("X-Custom-Foo", HeaderValue::from_static("bar"));
}
let headers = res.headers_ref().unwrap();
assert_eq!( headers["Accept"], "text/html" );
assert_eq!( headers["X-Custom-Foo"], "bar" );

pub fn extension<T>(self, extension: T) -> Builder

where T: Clone + Any + Send + Sync + 'static,

Adds an extension to this builder

Examples

let response = Response::builder()
    .extension("My Extension")
    .body(())
    .unwrap();

assert_eq!(response.extensions().get::<&'static str>(),
           Some(&"My Extension"));

pub fn extensions_ref(&self) -> Option<&Extensions>

Get a reference to the extensions for this response builder.

If the builder has an error, this returns None.

Example

let res = Response::builder().extension("My Extension").extension(5u32);
let extensions = res.extensions_ref().unwrap();
assert_eq!(extensions.get::<&'static str>(), Some(&"My Extension"));
assert_eq!(extensions.get::<u32>(), Some(&5u32));

pub fn extensions_mut(&mut self) -> Option<&mut Extensions>

Get a mutable reference to the extensions for this response builder.

If the builder has an error, this returns None.

Example

let mut res = Response::builder().extension("My Extension");
let mut extensions = res.extensions_mut().unwrap();
assert_eq!(extensions.get::<&'static str>(), Some(&"My Extension"));
extensions.insert(5u32);
assert_eq!(extensions.get::<u32>(), Some(&5u32));

pub fn body<T>(self, body: T) -> Result<Response<T>, Error>

“Consumes” this builder, using the provided body to return a constructed Response.

Errors

This function may return an error if any previously configured argument failed to parse or get converted to the internal representation. For example if an invalid head was specified via header("Foo", "Bar\r\n") the error will be returned when this function is called rather than when header was called.

Examples

let response = Response::builder()
    .body(())
    .unwrap();

Trait Implementations

impl Debug for Builder

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

Formats the value using the given formatter.

impl Default for Builder

fn default() -> Builder

Returns the “default value” for a type.

impl ResponseBuilderExt for Builder

fn url(self, url: Url) -> Builder

A builder method for the http::response::Builder type that allows the user to add a Url to the http::Response