@proton/ccxt/dist/cjs/src/static_dependencies/proxies/https-proxy-agent/parse-proxy-response.js

A JavaScript / TypeScript / Python / C# / PHP cryptocurrency trading library with support for 130+ exchanges

'use strict';

Object.defineProperty(exports, '__esModule', { value: true });

var createDebug = require('debug');

function _interopDefaultLegacy (e) { return e && typeof e === 'object' && 'default' in e ? e : { 'default': e }; }

var createDebug__default = /*#__PURE__*/_interopDefaultLegacy(createDebug);

const debug = createDebug__default["default"]('https-proxy-agent:parse-proxy-response');
function parseProxyResponse(socket) {
    return new Promise((resolve, reject) => {
        // we need to buffer any HTTP traffic that happens with the proxy before we get
        // the CONNECT response, so that if the response is anything other than an "200"
        // response code, then we can re-play the "data" events on the socket once the
        // HTTP parser is hooked up...
        let buffersLength = 0;
        const buffers = [];
        function read() {
            const b = socket.read();
            if (b)
                ondata(b);
            else
                socket.once('readable', read);
        }
        function cleanup() {
            socket.removeListener('end', onend);
            socket.removeListener('error', onerror);
            socket.removeListener('close', onclose);
            socket.removeListener('readable', read);
        }
        function onclose(err) {
            debug('onclose had error %o', err);
        }
        function onend() {
            debug('onend');
        }
        function onerror(err) {
            cleanup();
            debug('onerror %o', err);
            reject(err);
        }
        function ondata(b) {
            buffers.push(b);
            buffersLength += b.length;
            const buffered = Buffer.concat(buffers, buffersLength);
            const endOfHeaders = buffered.indexOf('\r\n\r\n');
            if (endOfHeaders === -1) {
                // keep buffering
                debug('have not received end of HTTP headers yet...');
                read();
                return;
            }
            const headerParts = buffered.toString('ascii').split('\r\n');
            const firstLine = headerParts.shift();
            if (!firstLine) {
                throw new Error('No header received');
            }
            const firstLineParts = firstLine.split(' ');
            const statusCode = +firstLineParts[1];
            const statusText = firstLineParts.slice(2).join(' ');
            const headers = {};
            for (const header of headerParts) {
                if (!header)
                    continue;
                const firstColon = header.indexOf(':');
                if (firstColon === -1) {
                    throw new Error(`Invalid header: "${header}"`);
                }
                const key = header.slice(0, firstColon).toLowerCase();
                const value = header.slice(firstColon + 1).trimStart();
                const current = headers[key];
                if (typeof current === 'string') {
                    headers[key] = [current, value];
                }
                else if (Array.isArray(current)) {
                    current.push(value);
                }
                else {
                    headers[key] = value;
                }
            }
            debug('got proxy server response: %o', firstLine);
            cleanup();
            resolve({
                connect: {
                    statusCode,
                    statusText,
                    headers,
                },
                buffered,
            });
        }
        socket.on('error', onerror);
        socket.on('close', onclose);
        socket.on('end', onend);
        read();
    });
}

exports.parseProxyResponse = parseProxyResponse;