protected String getSchemeFromHeader()

in aws-serverless-java-container-core/src/main/java/com/amazonaws/serverless/proxy/internal/servlet/AwsHttpServletRequest.java [620:635]

• 14 lines of code
• 6 McCabe index (conditional complexity)

    protected String getSchemeFromHeader(Headers headers) {
        // if we don't have any headers to deduce the value we assume HTTPS - API Gateway's default
        if (headers == null) {
            return "https";
        }
        String cfScheme = headers.getFirst(CF_PROTOCOL_HEADER_NAME);
        if (cfScheme != null && SecurityUtils.isValidScheme(cfScheme)) {
            return cfScheme;
        }
        String gwScheme = headers.getFirst(PROTOCOL_HEADER_NAME);
        if (gwScheme != null && SecurityUtils.isValidScheme(gwScheme)) {
            return gwScheme;
        }
        // https is our default scheme
        return "https";
    }