#[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 5071)
5021
5022
5023
5024
5025
5026
5027
5028
5029
5030
5031
5032
5033
5034
5035
5036
5037
5038
5039
5040
5041
5042
5043
5044
5045
5046
5047
5048
5049
5050
5051
5052
5053
5054
5055
5056
5057
5058
5059
5060
5061
5062
5063
5064
5065
5066
5067
5068
5069
5070
5071
5072
5073
5074
5075
5076
5077
5078
5079
5080
5081
    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