encrypted-fetcher/lib/EncryptedFetcher.js

Rest API Fetcher with AES Encryption

"use strict";
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g;
    return g = { next: verb(0), "throw": verb(1), "return": verb(2) }, typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
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            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
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        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.EncryptedFetcher = void 0;
var AesPkcs5_1 = require("./AesPkcs5");
var HttpError_1 = require("./HttpError");
if (typeof global === "object"
    && typeof global.process === "object"
    && typeof global.process.versions === "object"
    && typeof global.process.versions.node !== undefined)
    global.fetch = require("node-fetch");
var EncryptedFetcher = (function () {
    function EncryptedFetcher(host, password, headers) {
        this.host = host;
        this.password_ = password;
        this.headers_ = headers;
    }
    EncryptedFetcher.prototype.fetch = function (method, path, input) {
        return __awaiter(this, void 0, void 0, function () {
            var sendData, index, password_1, init, response, replyData, password;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        sendData = undefined;
                        if (input)
                            if (method === "GET" || method === "DELETE") {
                                index = path.lastIndexOf("?");
                                path += ((index === -1) ? "?" : "&")
                                    + new URLSearchParams(input).toString();
                            }
                            else {
                                sendData = JSON.stringify(input);
                                password_1 = this.password_ instanceof Function
                                    ? this.password_(sendData, true)
                                    : this.password_;
                                sendData = AesPkcs5_1.AesPkcs5.encode(sendData, password_1.key, password_1.iv);
                            }
                        init = {
                            method: method,
                            body: sendData,
                            headers: this.headers_
                        };
                        return [4, fetch("" + this.host + path, init)];
                    case 1:
                        response = _a.sent();
                        return [4, response.text()];
                    case 2:
                        replyData = _a.sent();
                        if (response.status !== 200 && response.status !== 201)
                            throw new HttpError_1.HttpError(method, path, response.status, replyData);
                        password = this.password_ instanceof Function
                            ? this.password_(replyData, false)
                            : this.password_;
                        replyData = AesPkcs5_1.AesPkcs5.decode(replyData, password.key, password.iv);
                        return [2, JSON.parse(replyData)];
                }
            });
        });
    };
    return EncryptedFetcher;
}());
exports.EncryptedFetcher = EncryptedFetcher;
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