Function sigv4_validate_request 

pub async fn sigv4_validate_request<B, G, F, S>(
    request: Request<B>,
    region: &str,
    service: &str,
    get_signing_key: &mut G,
    server_timestamp: DateTime<Utc>,
    required_headers: &S,
    options: SignatureOptions,
) -> Result<(Parts, Bytes, SigV4AuthenticatorResponse), BoxError>
where
    B: IntoRequestBytes,
    G: Service<GetSigningKeyRequest, Response = GetSigningKeyResponse, Error = BoxError, Future = F> + Send,
    F: Future<Output = Result<GetSigningKeyResponse, BoxError>> + Send,
    S: SignedHeaderRequirements,

Validate an AWS SigV4 request.

This takes in an HTTP Request along with other service-specific paramters. If the validation is successful (i.e. the request is properly signed with a known access key), this returns:

• The request headers (as HTTP Parts).
• The request body (as a Bytes object, which is empty if no body was provided).
• The response from the authenticator, which contains the principal and other session data.

Parameters

• request - The HTTP Request to validate.
• region - The AWS region in which the request is being made.
• service - The AWS service to which the request is being made.
• get_signing_key - A service that can provide the signing key for the request.
• server_timestamp - The timestamp of the server when the request was received. Usually this is the current time, Utc::now().
• required_headers - The headers that are required to be signed in the request in addition to the default SigV4 headers. If none, use NO_ADDITIONAL_SIGNED_HEADERS.
• options - SignatureOptionsthat affect the behavior of the signature validation. For most services, useSignatureOptions::default()`.

Errors

This function returns a SignatureError if the HTTP request is malformed or the request was not properly signed. The validation follows the AWS Auth Error Ordering document.