@typed/http/esm/createHttpEnv.js

HTTP requests for node and browsers

import { Disposable } from '@typed/disposable';
import { withHttpManagement } from './withHttpManagement';
const headerSeparator = ': ';
const newLineRegex = /[\r\n]+/;
/**
 * Creates an Http Environment that works in browser and node.
 */
export function createHttpEnv(options) {
    const env = { http };
    return options ? withHttpManagement(options, env) : env;
}
function http(url, options, callbacks) {
    const { success, failure } = callbacks;
    const { method = 'GET', headers, body } = options;
    const request = new XMLHttpRequest();
    const disposable = Disposable.lazy();
    request.onerror = () => disposable.addDisposable(failure(new Error(request.statusText)));
    request.addEventListener('load', () => {
        const headers = request.getAllResponseHeaders();
        // Convert the header string into an array
        // of individual headers
        const arr = headers.trim().split(newLineRegex);
        // Create a map of header names to values
        const headerMap = {};
        arr.forEach((line) => {
            const parts = line.split(headerSeparator);
            const header = parts.shift();
            const value = parts.join(headerSeparator);
            headerMap[header] = value;
        });
        disposable.addDisposable(success({
            responseText: request.responseText,
            status: request.status,
            statusText: request.statusText,
            headers: headerMap,
        }));
    });
    request.open(method, url);
    if (headers) {
        Object.keys(headers).forEach((header) => {
            request.setRequestHeader(header, headers[header] || '');
        });
    }
    request.send(body);
    return disposable;
}
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