#[non_exhaustive]
pub struct DefaultMiddleware;
Expand description

AWS Middleware Stack

This implements the middleware stack for this service. It will:

  1. Load credentials asynchronously into the property bag
  2. Sign the request with SigV4
  3. Resolve an Endpoint for the request
  4. Add a user agent to the request

Implementations§

Create a new DefaultMiddleware stack

Note: DefaultMiddleware holds no state.

Examples found in repository?
src/client.rs (line 5555)
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    pub fn from_conf(conf: crate::Config) -> Self {
        let retry_config = conf
            .retry_config()
            .cloned()
            .unwrap_or_else(aws_smithy_types::retry::RetryConfig::disabled);
        let timeout_config = conf
            .timeout_config()
            .cloned()
            .unwrap_or_else(aws_smithy_types::timeout::TimeoutConfig::disabled);
        let sleep_impl = conf.sleep_impl();
        if (retry_config.has_retry() || timeout_config.has_timeouts()) && sleep_impl.is_none() {
            panic!("An async sleep implementation is required for retries or timeouts to work. \
                                    Set the `sleep_impl` on the Config passed into this function to fix this panic.");
        }

        let connector = conf.http_connector().and_then(|c| {
            let timeout_config = conf
                .timeout_config()
                .cloned()
                .unwrap_or_else(aws_smithy_types::timeout::TimeoutConfig::disabled);
            let connector_settings =
                aws_smithy_client::http_connector::ConnectorSettings::from_timeout_config(
                    &timeout_config,
                );
            c.connector(&connector_settings, conf.sleep_impl())
        });

        let builder = aws_smithy_client::Builder::new();

        let builder = match connector {
            // Use provided connector
            Some(c) => builder.connector(c),
            None => {
                #[cfg(any(feature = "rustls", feature = "native-tls"))]
                {
                    // Use default connector based on enabled features
                    builder.dyn_https_connector(
                        aws_smithy_client::http_connector::ConnectorSettings::from_timeout_config(
                            &timeout_config,
                        ),
                    )
                }
                #[cfg(not(any(feature = "rustls", feature = "native-tls")))]
                {
                    panic!("No HTTP connector was available. Enable the `rustls` or `native-tls` crate feature or set a connector to fix this.");
                }
            }
        };
        let mut builder = builder
            .middleware(aws_smithy_client::erase::DynMiddleware::new(
                crate::middleware::DefaultMiddleware::new(),
            ))
            .retry_config(retry_config.into())
            .operation_timeout_config(timeout_config.into());
        builder.set_sleep_impl(sleep_impl);
        let client = builder.build();

        Self {
            handle: std::sync::Arc::new(Handle { client, conf }),
        }
    }

Trait Implementations§

Returns a copy of the value. Read more
Performs copy-assignment from source. Read more
Formats the value using the given formatter. Read more
Returns the “default value” for a type. Read more
The wrapped service
Wrap the given service with the middleware, returning a new service that has been decorated with the middleware. Read more

Auto Trait Implementations§

Blanket Implementations§

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
Instruments this type with the current Span, returning an Instrumented wrapper. Read more

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

Should always be Self
The resulting type after obtaining ownership.
Creates owned data from borrowed data, usually by cloning. Read more
Uses borrowed data to replace owned data, usually by cloning. Read more
The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.
Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more