serverless-spy
Version:
CDK-based library for writing elegant integration tests on AWS serverless architecture and an additional web console to monitor events in real time.
183 lines (174 loc) • 7.15 kB
JavaScript
var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __name = (target, value) => __defProp(target, "name", { value, configurable: true });
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
if (from && typeof from === "object" || typeof from === "function") {
for (let key of __getOwnPropNames(from))
if (!__hasOwnProp.call(to, key) && key !== except)
__defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
}
return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);
// src/index.ts
var src_exports = {};
__export(src_exports, {
EventStreamMarshaller: () => EventStreamMarshaller,
eventStreamSerdeProvider: () => eventStreamSerdeProvider
});
module.exports = __toCommonJS(src_exports);
// src/EventStreamMarshaller.ts
var import_eventstream_codec = require("@smithy/eventstream-codec");
// src/getChunkedStream.ts
function getChunkedStream(source) {
let currentMessageTotalLength = 0;
let currentMessagePendingLength = 0;
let currentMessage = null;
let messageLengthBuffer = null;
const allocateMessage = /* @__PURE__ */ __name((size) => {
if (typeof size !== "number") {
throw new Error("Attempted to allocate an event message where size was not a number: " + size);
}
currentMessageTotalLength = size;
currentMessagePendingLength = 4;
currentMessage = new Uint8Array(size);
const currentMessageView = new DataView(currentMessage.buffer);
currentMessageView.setUint32(0, size, false);
}, "allocateMessage");
const iterator = /* @__PURE__ */ __name(async function* () {
const sourceIterator = source[Symbol.asyncIterator]();
while (true) {
const { value, done } = await sourceIterator.next();
if (done) {
if (!currentMessageTotalLength) {
return;
} else if (currentMessageTotalLength === currentMessagePendingLength) {
yield currentMessage;
} else {
throw new Error("Truncated event message received.");
}
return;
}
const chunkLength = value.length;
let currentOffset = 0;
while (currentOffset < chunkLength) {
if (!currentMessage) {
const bytesRemaining = chunkLength - currentOffset;
if (!messageLengthBuffer) {
messageLengthBuffer = new Uint8Array(4);
}
const numBytesForTotal = Math.min(
4 - currentMessagePendingLength,
// remaining bytes to fill the messageLengthBuffer
bytesRemaining
// bytes left in chunk
);
messageLengthBuffer.set(
// @ts-ignore error TS2532: Object is possibly 'undefined' for value
value.slice(currentOffset, currentOffset + numBytesForTotal),
currentMessagePendingLength
);
currentMessagePendingLength += numBytesForTotal;
currentOffset += numBytesForTotal;
if (currentMessagePendingLength < 4) {
break;
}
allocateMessage(new DataView(messageLengthBuffer.buffer).getUint32(0, false));
messageLengthBuffer = null;
}
const numBytesToWrite = Math.min(
currentMessageTotalLength - currentMessagePendingLength,
// number of bytes left to complete message
chunkLength - currentOffset
// number of bytes left in the original chunk
);
currentMessage.set(
// @ts-ignore error TS2532: Object is possibly 'undefined' for value
value.slice(currentOffset, currentOffset + numBytesToWrite),
currentMessagePendingLength
);
currentMessagePendingLength += numBytesToWrite;
currentOffset += numBytesToWrite;
if (currentMessageTotalLength && currentMessageTotalLength === currentMessagePendingLength) {
yield currentMessage;
currentMessage = null;
currentMessageTotalLength = 0;
currentMessagePendingLength = 0;
}
}
}
}, "iterator");
return {
[Symbol.asyncIterator]: iterator
};
}
__name(getChunkedStream, "getChunkedStream");
// src/getUnmarshalledStream.ts
function getMessageUnmarshaller(deserializer, toUtf8) {
return async function(message) {
const { value: messageType } = message.headers[":message-type"];
if (messageType === "error") {
const unmodeledError = new Error(message.headers[":error-message"].value || "UnknownError");
unmodeledError.name = message.headers[":error-code"].value;
throw unmodeledError;
} else if (messageType === "exception") {
const code = message.headers[":exception-type"].value;
const exception = { [code]: message };
const deserializedException = await deserializer(exception);
if (deserializedException.$unknown) {
const error = new Error(toUtf8(message.body));
error.name = code;
throw error;
}
throw deserializedException[code];
} else if (messageType === "event") {
const event = {
[message.headers[":event-type"].value]: message
};
const deserialized = await deserializer(event);
if (deserialized.$unknown)
return;
return deserialized;
} else {
throw Error(`Unrecognizable event type: ${message.headers[":event-type"].value}`);
}
};
}
__name(getMessageUnmarshaller, "getMessageUnmarshaller");
// src/EventStreamMarshaller.ts
var _EventStreamMarshaller = class _EventStreamMarshaller {
constructor({ utf8Encoder, utf8Decoder }) {
this.eventStreamCodec = new import_eventstream_codec.EventStreamCodec(utf8Encoder, utf8Decoder);
this.utfEncoder = utf8Encoder;
}
deserialize(body, deserializer) {
const inputStream = getChunkedStream(body);
return new import_eventstream_codec.SmithyMessageDecoderStream({
messageStream: new import_eventstream_codec.MessageDecoderStream({ inputStream, decoder: this.eventStreamCodec }),
// @ts-expect-error Type 'T' is not assignable to type 'Record<string, any>'
deserializer: getMessageUnmarshaller(deserializer, this.utfEncoder)
});
}
serialize(inputStream, serializer) {
return new import_eventstream_codec.MessageEncoderStream({
messageStream: new import_eventstream_codec.SmithyMessageEncoderStream({ inputStream, serializer }),
encoder: this.eventStreamCodec,
includeEndFrame: true
});
}
};
__name(_EventStreamMarshaller, "EventStreamMarshaller");
var EventStreamMarshaller = _EventStreamMarshaller;
// src/provider.ts
var eventStreamSerdeProvider = /* @__PURE__ */ __name((options) => new EventStreamMarshaller(options), "eventStreamSerdeProvider");
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
EventStreamMarshaller,
eventStreamSerdeProvider
});