public static Checksummer checksummer()

in core/http-auth-aws/src/main/java/software/amazon/awssdk/http/auth/aws/internal/signer/util/ChecksumUtil.java [159:202]

37 lines of code
14 McCabe index (conditional complexity)


    public static Checksummer checksummer(BaseSignRequest<?, ? extends AwsCredentialsIdentity> request,
                                          Boolean isPayloadSigningOverride) {
        boolean isPayloadSigning = isPayloadSigningOverride != null ? isPayloadSigningOverride : isPayloadSigning(request);
        boolean isEventStreaming = isEventStreaming(request.request());
        boolean hasChecksumHeader = hasChecksumHeader(request);
        boolean isChunkEncoding = request.requireProperty(CHUNK_ENCODING_ENABLED, false);
        boolean isTrailing = request.request().firstMatchingHeader(X_AMZ_TRAILER).isPresent();
        boolean isFlexible = request.hasProperty(CHECKSUM_ALGORITHM) && !hasChecksumHeader;
        boolean isAnonymous = CredentialUtils.isAnonymous(request.identity());

        if (isEventStreaming) {
            return Checksummer.forPrecomputed256Checksum(STREAMING_EVENTS_PAYLOAD);
        }

        if (isPayloadSigning) {
            if (isChunkEncoding) {
                if (isFlexible || isTrailing) {
                    return Checksummer.forPrecomputed256Checksum(STREAMING_SIGNED_PAYLOAD_TRAILER);
                }
                return Checksummer.forPrecomputed256Checksum(STREAMING_SIGNED_PAYLOAD);
            }

            if (isFlexible) {
                return Checksummer.forFlexibleChecksum(request.property(CHECKSUM_ALGORITHM));
            }
            return Checksummer.create();
        }

        if (isFlexible || isTrailing) {
            if (isChunkEncoding) {
                return Checksummer.forPrecomputed256Checksum(STREAMING_UNSIGNED_PAYLOAD_TRAILER);
            }
        }

        if (isFlexible) {
            return Checksummer.forFlexibleChecksum(UNSIGNED_PAYLOAD, request.property(CHECKSUM_ALGORITHM));
        }

        if (isAnonymous) {
            return Checksummer.forNoOp();
        }

        return Checksummer.forPrecomputed256Checksum(UNSIGNED_PAYLOAD);
    }