@aws-sdk/signature-v4-crt/dist-es/headerUtil.js

A revision of AWS Signature V4 request signer based on AWS Common Runtime https://github.com/awslabs/aws-crt-nodejs

export function hasHeader(soughtHeader, headers) {
    soughtHeader = soughtHeader.toLowerCase();
    for (const headerName of Object.keys(headers)) {
        if (soughtHeader === headerName.toLowerCase()) {
            return true;
        }
    }
    return false;
}
export function getHeaderValue(soughtHeader, headers) {
    soughtHeader = soughtHeader.toLowerCase();
    for (const headerName of Object.keys(headers)) {
        if (soughtHeader === headerName.toLowerCase()) {
            return headers[headerName];
        }
    }
    return undefined;
}
export function deleteHeader(soughtHeader, headers) {
    soughtHeader = soughtHeader.toLowerCase();
    for (const headerName of Object.keys(headers)) {
        if (soughtHeader === headerName.toLowerCase()) {
            delete headers[headerName];
        }
    }
}