all files / modules/utils/ normalizeHeaderName.js

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const IrregularHeaderNames = require("./IrregularHeaderNames");
 
/**
 * Normalizes HTTP header names according to RFC 2616.
 */
function normalizeHeaderName(headerName) {
    headerName = headerName.toLowerCase();
 
    if (headerName in IrregularHeaderNames) {
        return IrregularHeaderNames[headerName];
    }
 
    return headerName.replace(/(^|-)([a-z])/g, function (match, dash, letter) {
        return dash + letter.toUpperCase();
    });
}
 
module.exports = normalizeHeaderName;