nats
Version:
Node.js client for NATS, a lightweight, high-performance cloud native messaging system
67 lines • 2.12 kB
JavaScript
;
/*
* Copyright 2020-2022 The NATS Authors
* 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.
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.StringCodec = StringCodec;
exports.JSONCodec = JSONCodec;
const encoders_1 = require("./encoders");
const core_1 = require("./core");
/**
* Returns a {@link Codec} for encoding strings to a message payload
* and decoding message payloads into strings.
* @constructor
*/
function StringCodec() {
return {
encode(d) {
return encoders_1.TE.encode(d);
},
decode(a) {
return encoders_1.TD.decode(a);
},
};
}
/**
* Returns a {@link Codec} for encoding JavaScript object to JSON and
* serialize them to an Uint8Array, and conversely, from an
* Uint8Array to JSON to a JavaScript Object.
* @param reviver
* @constructor
*/
function JSONCodec(reviver) {
return {
encode(d) {
try {
if (d === undefined) {
// @ts-ignore: json will not handle undefined
d = null;
}
return encoders_1.TE.encode(JSON.stringify(d));
}
catch (err) {
throw core_1.NatsError.errorForCode(core_1.ErrorCode.BadJson, err);
}
},
decode(a) {
try {
return JSON.parse(encoders_1.TD.decode(a), reviver);
}
catch (err) {
throw core_1.NatsError.errorForCode(core_1.ErrorCode.BadJson, err);
}
},
};
}
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