Struct isahc::config::ExpectContinue

pub struct ExpectContinue { /* fields omitted */ }

Controls the use of the Expect request header when sending request bodies with HTTP/1.1.

By default, when sending requests containing a body of large or unknown length over HTTP/1.1, Isahc will send the request headers first without the body and wait for the server to respond with a 100 (Continue) status code, as defined by RFC 7231, Section 5.1.1. This gives the opportunity for the server to reject the response without needing to first transmit the request body over the network, if the body contents are not necessary for the server to determine an appropriate response.

For servers that do not support this behavior and instead simply wait for the request body without responding with a 100 (Continue), there is a limited timeout before the response body is sent anyway without confirmation. The default timeout is 1 second, but this can be configured.

The Expect behavior can also be disabled entirely.

This configuration only takes effect when using HTTP/1.1.

Implementations

impl ExpectContinue

pub const fn enabled() -> Self

Enable the use of Expect and wait for a 100 (Continue) response with a default timeout before sending a request body.

pub const fn timeout(timeout: Duration) -> Self

Enable the use of Expect and wait for a 100 (Continue) response, up to the given timeout, before sending a request body.

pub const fn disabled() -> Self

Disable the use and handling of the Expect request header.

Trait Implementations

impl Clone for ExpectContinue

fn clone(&self) -> ExpectContinue

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ExpectContinue

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

Formats the value using the given formatter.

impl Default for ExpectContinue

fn default() -> Self

Returns the “default value” for a type.

impl From<Duration> for ExpectContinue

fn from(value: Duration) -> Self

Performs the conversion.

impl From<bool> for ExpectContinue

fn from(value: bool) -> Self

Performs the conversion.