@nestia/fetcher/lib/EncryptedFetcher.mjs

Fetcher library of Nestia SDK

import { AesPkcs5 } from './AesPkcs5.mjs';
import { FetcherBase } from './internal/FetcherBase.mjs';

/**
 * 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) {
    async function fetch(connection, route, input, stringify) {
        if ((route.request?.encrypted === true || route.response?.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.request({
            className: "EncryptedFetcher",
            encode: route.request?.encrypted === true
                ? (input, headers) => {
                    const p = closure("encode")(headers, input);
                    return AesPkcs5.encrypt((stringify ?? JSON.stringify)(input), p.key, p.iv);
                }
                : (input) => input,
            decode: route.response?.encrypted === true
                ? (input, headers) => {
                    const p = closure("decode")(headers, input);
                    const s = AesPkcs5.decrypt(input, p.key, p.iv);
                    return s.length ? JSON.parse(s) : s;
                }
                : (input) => input,
        })(connection, route, input, stringify);
    }
    EncryptedFetcher.fetch = fetch;
    async function propagate(connection, route, input, stringify) {
        if ((route.request?.encrypted === true || route.response?.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.propagate({
            className: "EncryptedFetcher",
            encode: route.request?.encrypted === true
                ? (input, headers) => {
                    const p = closure("encode")(headers, input);
                    return AesPkcs5.encrypt((stringify ?? JSON.stringify)(input), p.key, p.iv);
                }
                : (input) => input,
            decode: route.response?.encrypted === true
                ? (input, headers) => {
                    const p = closure("decode")(headers, input);
                    const s = AesPkcs5.decrypt(input, p.key, p.iv);
                    return s.length ? JSON.parse(s) : s;
                }
                : (input) => input,
        })(connection, route, input, stringify);
    }
    EncryptedFetcher.propagate = propagate;
})(EncryptedFetcher || (EncryptedFetcher = {}));

export { EncryptedFetcher };
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