@achingbrain/nat-port-mapper/dist/src/upnp/fetch.js

Port mapping with UPnP and NAT-PMP

import { logger } from '@libp2p/logger';
import xml2js from 'xml2js';
import { NS_SOAP } from './constants.js';
import { getNamespace } from './utils.js';
const log = logger('nat-port-mapper:upnp:fetch');
export async function fetchXML(url, init) {
    const response = await fetch(url, init);
    log.trace('-> %s %s', init.method ?? 'GET', url, response.status);
    if (init.body != null) {
        log.trace('->', init.body);
    }
    const contentType = response.headers.get('content-type');
    if (contentType?.includes('/xml') !== true) {
        throw new Error(`Bad content type: ${contentType}`);
    }
    const responseText = await response.text();
    log.trace('<-', responseText);
    const parser = new xml2js.Parser({
        explicitRoot: false,
        explicitArray: false,
        attrkey: '@'
    });
    const responseBody = await parser.parseStringPromise(responseText);
    if (!response.ok) {
        const soapns = getNamespace(responseBody, NS_SOAP);
        const body = responseBody[`${soapns}Body`];
        const fault = body[`${soapns}Fault`];
        const error = fault?.detail?.UPnPError ?? {
            errorCode: -1,
            errorDescription: 'Unknown error'
        };
        if (fault?.detail?.UPnPError != null) {
            throw new UPnPError(`Code ${error.errorCode} - ${error.errorDescription}`);
        }
        throw new Error(`Request failed: ${response.statusText}`);
    }
    return responseBody;
}
class UPnPError extends Error {
    static name = 'UPnPError';
    name = 'UPnPError';
}
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