ultimate-ws/src/request.js

The Ultimate WebSocket server. ws-compatible server, based on uWebSockets.

/*
Copyright 2024 dimden.dev

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

const discardedDuplicates = [
    "age", "authorization", "content-length", "content-type", "etag", "expires",
    "from", "host", "if-modified-since", "if-unmodified-since", "last-modified",
    "location", "max-forwards", "proxy-authorization", "referer", "retry-after",
    "server", "user-agent"
];

module.exports = class IncomingMessage {
    #rawHeadersEntries = [];
    #cachedHeaders = null;
    #cachedDistinctHeaders = null;
    #cachedParsedIp = null;
    constructor(app, req, res) {
        this.app = app;
        this.req = req;
        this.res = res;
        this.urlQuery = req.getQuery() ?? '';
        if(this.urlQuery) {
            this.urlQuery = '?' + this.urlQuery;
        }
        this.url = req.getUrl() + this.urlQuery;
        this.method = req.getMethod();
        this.rawIp = res.getRemoteAddress();
        req.forEach((key, value) => {
            this.#rawHeadersEntries.push([key, value]);
        });
    }

    get parsedIp() {
        if(this.#cachedParsedIp) {
            return this.#cachedParsedIp;
        }
        let ip = '';
        if(this.rawIp.byteLength === 4) {
            // ipv4
            ip = this.rawIp.join('.');
        } else {
            // ipv6
            const dv = new DataView(this.rawIp);
            for(let i = 0; i < 8; i++) {
                ip += dv.getUint16(i * 2).toString(16).padStart(4, '0');
                if(i < 7) {
                    ip += ':';
                }
            }
        }
        this.#cachedParsedIp = ip;
        return ip;
    }

    get connection() {
        return {
            remoteAddress: this.parsedIp,
            localPort: this.app.port,
            remotePort: this.app.port,
            encrypted: this.app.ssl,
            destroy: () => this.res.close(),
            end: (data, encoding, callback) => {
                this.res.end(data, true);
                if(callback) process.nextTick(callback);
            },
        };
    }

    get socket() {
        return this.connection;
    }

    get headers() {
        // https://nodejs.org/api/http.html#messageheaders
        if(this.#cachedHeaders) {
            return this.#cachedHeaders;
        }
        let headers = {};
        this.#rawHeadersEntries.forEach((val) => {
            const key = val[0].toLowerCase();
            const value = val[1];
            if(headers[key]) {
                if(discardedDuplicates.includes(key)) {
                    return;
                }
                if(key === 'cookie') {
                    headers[key] += '; ' + value;
                } else if(key === 'set-cookie') {
                    headers[key].push(value);
                } else {
                    headers[key] += ', ' + value;
                }
                return;
            }
            if(key === 'set-cookie') {
                headers[key] = [value];
            } else {
                headers[key] = value;
            }
        });
        this.#cachedHeaders = headers;
        return headers;
    }

    get headersDistinct() {
        if(this.#cachedDistinctHeaders) {
            return this.#cachedDistinctHeaders;
        }
        let headers = {};
        this.#rawHeadersEntries.forEach((val) => {
            if(!headers[val[0]]) {
                headers[val[0]] = [];
            }
            headers[val[0]].push(val[1]);
        });
        this.#cachedDistinctHeaders = headers;
        return headers;
    }

    get rawHeaders() {
        const res = [];
        this.#rawHeadersEntries.forEach((val) => {
            res.push(val[0], val[1]);
        });
        return res;
    }

    get httpVersion() {
        return '1.1';
    }

    get httpVersionMajor() {
        return 1;
    }

    get httpVersionMinor() {
        return 1;
    }
}