Message

Add a header to these headers. The header should be a type with a recurring Header instance to ensure that the new value can be appended to any existing values.

>>> import cats.effect.IO
>>> import org.http4s.headers.Accept

>>> val req = Request[IO]().addHeader(Accept(MediaRange.`application/*`))
>>> req.headers.get[Accept]
Some(Accept(NonEmptyList(application/*)))

>>> val req2 = req.addHeader(Accept(MediaRange.`text/*`))
>>> req2.headers.get[Accept]
Some(Accept(NonEmptyList(application/*, text/*)))

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Lifts this Message's body to the specified effect type.

Keep headers that satisfy the predicate

Add the provided headers to the existing headers, replacing those of the same header name

>>> import cats.effect.IO
>>> import org.http4s.headers.Accept

>>> val req = Request[IO]().putHeaders(Accept(MediaRange.`application/*`))
>>> req.headers.get[Accept]
Some(Accept(NonEmptyList(application/*)))

>>> val req2 = req.putHeaders(Accept(MediaRange.`text/*`))
>>> req2.headers.get[Accept]
Some(Accept(NonEmptyList(text/*)))

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The trailer headers, as specified in Section 3.6.1 of RFC 2616. The resulting F might not complete until the entire body has been consumed.

Generates a new message object with the specified key/value pair appended to the attributes.

Sets the entity body without affecting headers such as Transfer-Encoding or Content-Length. Most use cases are better served by withEntity, which uses an EntityEncoder to maintain the headers.

Set an empty entity body on this message, and remove all payload headers that make no sense with an empty body.

Replace the body of this message with a new body

Returns a new message object without the specified key in the attributes.

Decode the Media to the specified type

If no valid Status has been described, allow Ok

Decode the Media to the specified type