@domoinc/ryuu-proxy/dist/index.js

a middleware that provides a proxy for local domo app development

"use strict";
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Object.defineProperty(exports, "__esModule", { value: true });
exports.Proxy = void 0;
const path = __importStar(require("path"));
const os = __importStar(require("os"));
const form_data_1 = __importDefault(require("form-data"));
const fs_1 = require("fs");
const https_proxy_agent_1 = require("https-proxy-agent");
const dotenv = __importStar(require("dotenv"));
const busboy_1 = __importDefault(require("busboy"));
const Transport_1 = __importDefault(require("./lib/Transport"));
class Proxy {
    constructor(config) {
        this.onError = (err, res) => {
            const status = err.response?.data?.statusCode !== undefined ? err.response.data.statusCode : 500;
            const msg = err.response?.data?.statusMessage !== undefined ? err.response.data.statusMessage : (err.message ?? err);
            res.status(status).send(msg);
        };
        this.express = () => (req, res, next) => {
            if (this.transport.isDomoRequest(req.url)) {
                if (this.transport.isMultiPartRequest(req.headers)) {
                    const bb = (0, busboy_1.default)({ headers: req.headers });
                    let filePath;
                    let fieldName;
                    bb.on('file', (fieldname, filestream, fileMetadata) => {
                        filePath = path.join(os.tmpdir(), path.basename(fileMetadata.filename));
                        fieldName = fieldname;
                        filestream.pipe((0, fs_1.createWriteStream)(filePath));
                    });
                    bb.on('finish', () => {
                        this.transport
                            .buildBasic(req)
                            .then((options) => {
                            const form = new form_data_1.default();
                            form.append(fieldName, (0, fs_1.createReadStream)(filePath));
                            return this.transport.request({
                                ...options,
                                headers: { ...options.headers, ...form.getHeaders() },
                                data: form,
                            });
                        })
                            .then((rawRequest) => rawRequest.data.pipe(res))
                            .catch((err) => this.onError(err, res));
                    });
                    return req.pipe(bb);
                }
                return this.transport
                    .build(req)
                    .then((options) => this.transport.request({
                    ...options,
                    httpsAgent: this.agent,
                }))
                    .then((rawRequest) => rawRequest.data.pipe(res))
                    .catch((err) => this.onError(err, res));
            }
            return next();
        };
        this.stream = (req) => {
            if (this.transport.isDomoRequest(req.url)) {
                return this.transport
                    .build(req)
                    .then(this.transport.request)
                    .catch((err) => {
                    // Re-throw the error so callers can handle it
                    throw err;
                });
            }
            return undefined;
        };
        this.transport = new Transport_1.default(config);
        dotenv.config({ path: `${process.cwd()}/.env` });
        const proxyHost = process.env.REACT_APP_PROXY_HOST ?? process.env.PROXY_HOST;
        const proxyPort = process.env.REACT_APP_PROXY_PORT ?? process.env.PROXY_PORT;
        const proxyUsername = process.env.REACT_APP_PROXY_USERNAME ?? process.env.PROXY_USERNAME;
        const proxyPassword = process.env.REACT_APP_PROXY_PASSWORD ?? process.env.PROXY_PASSWORD;
        if (proxyHost !== undefined && proxyPort !== undefined) {
            if (proxyUsername !== undefined && proxyPassword !== undefined) {
                this.agent = new https_proxy_agent_1.HttpsProxyAgent(`http://${proxyUsername}:${proxyPassword}@${proxyHost}:${proxyPort}`);
            }
            else {
                this.agent = new https_proxy_agent_1.HttpsProxyAgent(`http://${proxyHost}:${proxyPort}`);
            }
        }
    }
}
exports.Proxy = Proxy;
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