mountebank-dev/src/models/http/headersHelper.js

Over the wire test doubles

'use strict';

function add (current, value) {
    return Array.isArray(current) ? current.concat(value) : [current].concat(value);
}

function arrayifyIfExists (current, value) {
    return current ? add(current, value) : value;
}

function headersFor (rawHeaders) {
    const result = {};
    for (let i = 0; i < rawHeaders.length; i += 2) {
        const name = rawHeaders[i];
        const value = rawHeaders[i + 1];
        result[name] = arrayifyIfExists(result[name], value);
    }
    return result;
}

function hasHeader (headerName, headers) {
    return Object.keys(headers).some(header => header.toLowerCase() === headerName.toLowerCase());
}

function getHeader (headerName, headers) {
    return headers[headerNameFor(headerName, headers)];
}

function setHeader (headerName, value, headers) {
    headers[headerNameFor(headerName, headers)] = value;
}

function headerNameFor (headerName, headers) {
    const helpers = require('../../util/helpers'),
        result = Object.keys(headers).find(header => header.toLowerCase() === headerName.toLowerCase());

    if (!helpers.defined(result)) {
        return headerName;
    }
    else {
        return result;
    }
}

function getJar (headers) {
    return {
        get: header => getHeader(header, headers),
        set: (header, value) => setHeader(header, value, headers)
    };
}

module.exports = { headersFor, hasHeader, headerNameFor, getJar, getHeader, setHeader };