lambda-live-debugger
Version:
Debug Lambda functions locally like it is running in the cloud
67 lines (66 loc) • 2.67 kB
JavaScript
import { NormalizedSchema } from "@smithy/core/schema";
import { _parseEpochTimestamp, _parseRfc3339DateTimeWithOffset, _parseRfc7231DateTime, LazyJsonString, NumericValue, splitHeader, } from "@smithy/core/serde";
import { fromBase64 } from "@smithy/util-base64";
import { toUtf8 } from "@smithy/util-utf8";
import { SerdeContext } from "../SerdeContext";
import { determineTimestampFormat } from "./determineTimestampFormat";
export class FromStringShapeDeserializer extends SerdeContext {
settings;
constructor(settings) {
super();
this.settings = settings;
}
read(_schema, data) {
const ns = NormalizedSchema.of(_schema);
if (ns.isListSchema()) {
return splitHeader(data).map((item) => this.read(ns.getValueSchema(), item));
}
if (ns.isBlobSchema()) {
return (this.serdeContext?.base64Decoder ?? fromBase64)(data);
}
if (ns.isTimestampSchema()) {
const format = determineTimestampFormat(ns, this.settings);
switch (format) {
case 5:
return _parseRfc3339DateTimeWithOffset(data);
case 6:
return _parseRfc7231DateTime(data);
case 7:
return _parseEpochTimestamp(data);
default:
console.warn("Missing timestamp format, parsing value with Date constructor:", data);
return new Date(data);
}
}
if (ns.isStringSchema()) {
const mediaType = ns.getMergedTraits().mediaType;
let intermediateValue = data;
if (mediaType) {
if (ns.getMergedTraits().httpHeader) {
intermediateValue = this.base64ToUtf8(intermediateValue);
}
const isJson = mediaType === "application/json" || mediaType.endsWith("+json");
if (isJson) {
intermediateValue = LazyJsonString.from(intermediateValue);
}
return intermediateValue;
}
}
if (ns.isNumericSchema()) {
return Number(data);
}
if (ns.isBigIntegerSchema()) {
return BigInt(data);
}
if (ns.isBigDecimalSchema()) {
return new NumericValue(data, "bigDecimal");
}
if (ns.isBooleanSchema()) {
return String(data).toLowerCase() === "true";
}
return data;
}
base64ToUtf8(base64String) {
return (this.serdeContext?.utf8Encoder ?? toUtf8)((this.serdeContext?.base64Decoder ?? fromBase64)(base64String));
}
}