@nestia/fetcher/lib/EncryptedFetcher.js

Fetcher library of Nestia SDK

"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());
    });
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.EncryptedFetcher = void 0;
const AesPkcs5_1 = require("./AesPkcs5");
const FetcherBase_1 = require("./internal/FetcherBase");
/**
 * Utility class for `fetch` functions used in `@nestia/sdk` with encryption.
 *
 * `EncryptedFetcher` is a utility class designed for SDK functions generated by
 * [`@nestia/sdk`](https://nestia.io/docs/sdk/sdk), interacting with the remote
 * HTTP API encrypted by AES-PKCS algorithm. In other words, this is a
 * collection of dedicated `fetch()` functions for `@nestia/sdk` with
 * encryption.
 *
 * For reference, `EncryptedFetcher` class being used only when target
 * controller method is encrypting body data by `@EncryptedRoute` or
 * `@EncryptedBody` decorators. If those decorators are not used,
 * {@link PlainFetcher} class would be used instead.
 *
 * @author Jeongho Nam - https://github.com/samchon
 */
var EncryptedFetcher;
(function (EncryptedFetcher) {
    function fetch(connection, route, input, stringify) {
        return __awaiter(this, void 0, void 0, function* () {
            var _a, _b, _c, _d;
            if ((((_a = route.request) === null || _a === void 0 ? void 0 : _a.encrypted) === true || ((_b = route.response) === null || _b === void 0 ? void 0 : _b.encrypted)) &&
                connection.encryption === undefined)
                throw new Error("Error on EncryptedFetcher.fetch(): the encryption password has not been configured.");
            const closure = typeof connection.encryption === "function"
                ? (direction) => (headers, body) => connection.encryption({
                    headers,
                    body,
                    direction,
                })
                : () => () => connection.encryption;
            return FetcherBase_1.FetcherBase.request({
                className: "EncryptedFetcher",
                encode: ((_c = route.request) === null || _c === void 0 ? void 0 : _c.encrypted) === true
                    ? (input, headers) => {
                        const p = closure("encode")(headers, input);
                        return AesPkcs5_1.AesPkcs5.encrypt((stringify !== null && stringify !== void 0 ? stringify : JSON.stringify)(input), p.key, p.iv);
                    }
                    : (input) => input,
                decode: ((_d = route.response) === null || _d === void 0 ? void 0 : _d.encrypted) === true
                    ? (input, headers) => {
                        const p = closure("decode")(headers, input);
                        const s = AesPkcs5_1.AesPkcs5.decrypt(input, p.key, p.iv);
                        return s.length ? JSON.parse(s) : s;
                    }
                    : (input) => input,
            })(connection, route, input, stringify);
        });
    }
    EncryptedFetcher.fetch = fetch;
    function propagate(connection, route, input, stringify) {
        return __awaiter(this, void 0, void 0, function* () {
            var _a, _b, _c, _d;
            if ((((_a = route.request) === null || _a === void 0 ? void 0 : _a.encrypted) === true || ((_b = route.response) === null || _b === void 0 ? void 0 : _b.encrypted)) &&
                connection.encryption === undefined)
                throw new Error("Error on EncryptedFetcher.propagate(): the encryption password has not been configured.");
            const closure = typeof connection.encryption === "function"
                ? (direction) => (headers, body) => connection.encryption({
                    headers,
                    body,
                    direction,
                })
                : () => () => connection.encryption;
            return FetcherBase_1.FetcherBase.propagate({
                className: "EncryptedFetcher",
                encode: ((_c = route.request) === null || _c === void 0 ? void 0 : _c.encrypted) === true
                    ? (input, headers) => {
                        const p = closure("encode")(headers, input);
                        return AesPkcs5_1.AesPkcs5.encrypt((stringify !== null && stringify !== void 0 ? stringify : JSON.stringify)(input), p.key, p.iv);
                    }
                    : (input) => input,
                decode: ((_d = route.response) === null || _d === void 0 ? void 0 : _d.encrypted) === true
                    ? (input, headers) => {
                        const p = closure("decode")(headers, input);
                        const s = AesPkcs5_1.AesPkcs5.decrypt(input, p.key, p.iv);
                        return s.length ? JSON.parse(s) : s;
                    }
                    : (input) => input,
            })(connection, route, input, stringify);
        });
    }
    EncryptedFetcher.propagate = propagate;
})(EncryptedFetcher || (exports.EncryptedFetcher = EncryptedFetcher = {}));
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