415gotit
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dela
734
node_modules/@msgpack/msgpack/dist.esm/Decoder.mjs
generated
vendored
Normal file
734
node_modules/@msgpack/msgpack/dist.esm/Decoder.mjs
generated
vendored
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@@ -0,0 +1,734 @@
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import { prettyByte } from "./utils/prettyByte.mjs";
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import { ExtensionCodec } from "./ExtensionCodec.mjs";
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import { getInt64, getUint64, UINT32_MAX } from "./utils/int.mjs";
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import { utf8Decode } from "./utils/utf8.mjs";
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import { ensureUint8Array } from "./utils/typedArrays.mjs";
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import { CachedKeyDecoder } from "./CachedKeyDecoder.mjs";
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import { DecodeError } from "./DecodeError.mjs";
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const STATE_ARRAY = "array";
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const STATE_MAP_KEY = "map_key";
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const STATE_MAP_VALUE = "map_value";
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const mapKeyConverter = (key) => {
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if (typeof key === "string" || typeof key === "number") {
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return key;
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}
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throw new DecodeError("The type of key must be string or number but " + typeof key);
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};
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class StackPool {
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stack = [];
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stackHeadPosition = -1;
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get length() {
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return this.stackHeadPosition + 1;
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}
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top() {
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return this.stack[this.stackHeadPosition];
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}
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pushArrayState(size) {
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const state = this.getUninitializedStateFromPool();
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state.type = STATE_ARRAY;
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state.position = 0;
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state.size = size;
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state.array = new Array(size);
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}
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pushMapState(size) {
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const state = this.getUninitializedStateFromPool();
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state.type = STATE_MAP_KEY;
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state.readCount = 0;
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state.size = size;
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state.map = {};
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}
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getUninitializedStateFromPool() {
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this.stackHeadPosition++;
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if (this.stackHeadPosition === this.stack.length) {
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const partialState = {
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type: undefined,
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size: 0,
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array: undefined,
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position: 0,
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readCount: 0,
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map: undefined,
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key: null,
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};
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this.stack.push(partialState);
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}
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return this.stack[this.stackHeadPosition];
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}
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release(state) {
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const topStackState = this.stack[this.stackHeadPosition];
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if (topStackState !== state) {
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throw new Error("Invalid stack state. Released state is not on top of the stack.");
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}
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if (state.type === STATE_ARRAY) {
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const partialState = state;
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partialState.size = 0;
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partialState.array = undefined;
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partialState.position = 0;
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partialState.type = undefined;
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}
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if (state.type === STATE_MAP_KEY || state.type === STATE_MAP_VALUE) {
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const partialState = state;
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partialState.size = 0;
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partialState.map = undefined;
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partialState.readCount = 0;
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partialState.type = undefined;
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}
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this.stackHeadPosition--;
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}
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reset() {
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this.stack.length = 0;
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this.stackHeadPosition = -1;
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}
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}
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const HEAD_BYTE_REQUIRED = -1;
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const EMPTY_VIEW = new DataView(new ArrayBuffer(0));
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const EMPTY_BYTES = new Uint8Array(EMPTY_VIEW.buffer);
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try {
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// IE11: The spec says it should throw RangeError,
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// IE11: but in IE11 it throws TypeError.
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EMPTY_VIEW.getInt8(0);
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}
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catch (e) {
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if (!(e instanceof RangeError)) {
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throw new Error("This module is not supported in the current JavaScript engine because DataView does not throw RangeError on out-of-bounds access");
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}
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}
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const MORE_DATA = new RangeError("Insufficient data");
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const sharedCachedKeyDecoder = new CachedKeyDecoder();
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export class Decoder {
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extensionCodec;
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context;
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useBigInt64;
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rawStrings;
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maxStrLength;
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maxBinLength;
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maxArrayLength;
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maxMapLength;
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maxExtLength;
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keyDecoder;
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mapKeyConverter;
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totalPos = 0;
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pos = 0;
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view = EMPTY_VIEW;
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bytes = EMPTY_BYTES;
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headByte = HEAD_BYTE_REQUIRED;
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stack = new StackPool();
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entered = false;
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constructor(options) {
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this.extensionCodec = options?.extensionCodec ?? ExtensionCodec.defaultCodec;
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this.context = options?.context; // needs a type assertion because EncoderOptions has no context property when ContextType is undefined
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this.useBigInt64 = options?.useBigInt64 ?? false;
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this.rawStrings = options?.rawStrings ?? false;
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this.maxStrLength = options?.maxStrLength ?? UINT32_MAX;
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this.maxBinLength = options?.maxBinLength ?? UINT32_MAX;
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this.maxArrayLength = options?.maxArrayLength ?? UINT32_MAX;
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this.maxMapLength = options?.maxMapLength ?? UINT32_MAX;
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this.maxExtLength = options?.maxExtLength ?? UINT32_MAX;
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this.keyDecoder = options?.keyDecoder !== undefined ? options.keyDecoder : sharedCachedKeyDecoder;
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this.mapKeyConverter = options?.mapKeyConverter ?? mapKeyConverter;
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}
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clone() {
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// eslint-disable-next-line @typescript-eslint/no-unsafe-argument
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return new Decoder({
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extensionCodec: this.extensionCodec,
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context: this.context,
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useBigInt64: this.useBigInt64,
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rawStrings: this.rawStrings,
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maxStrLength: this.maxStrLength,
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maxBinLength: this.maxBinLength,
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maxArrayLength: this.maxArrayLength,
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maxMapLength: this.maxMapLength,
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maxExtLength: this.maxExtLength,
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keyDecoder: this.keyDecoder,
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});
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}
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reinitializeState() {
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this.totalPos = 0;
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this.headByte = HEAD_BYTE_REQUIRED;
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this.stack.reset();
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// view, bytes, and pos will be re-initialized in setBuffer()
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}
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setBuffer(buffer) {
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const bytes = ensureUint8Array(buffer);
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this.bytes = bytes;
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this.view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
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this.pos = 0;
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}
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appendBuffer(buffer) {
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if (this.headByte === HEAD_BYTE_REQUIRED && !this.hasRemaining(1)) {
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this.setBuffer(buffer);
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}
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else {
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const remainingData = this.bytes.subarray(this.pos);
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const newData = ensureUint8Array(buffer);
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// concat remainingData + newData
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const newBuffer = new Uint8Array(remainingData.length + newData.length);
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newBuffer.set(remainingData);
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newBuffer.set(newData, remainingData.length);
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this.setBuffer(newBuffer);
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}
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}
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hasRemaining(size) {
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return this.view.byteLength - this.pos >= size;
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}
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createExtraByteError(posToShow) {
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const { view, pos } = this;
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return new RangeError(`Extra ${view.byteLength - pos} of ${view.byteLength} byte(s) found at buffer[${posToShow}]`);
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}
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/**
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* @throws {@link DecodeError}
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* @throws {@link RangeError}
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*/
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decode(buffer) {
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if (this.entered) {
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const instance = this.clone();
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return instance.decode(buffer);
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}
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try {
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this.entered = true;
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this.reinitializeState();
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this.setBuffer(buffer);
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const object = this.doDecodeSync();
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if (this.hasRemaining(1)) {
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throw this.createExtraByteError(this.pos);
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}
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return object;
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}
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finally {
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this.entered = false;
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}
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}
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*decodeMulti(buffer) {
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if (this.entered) {
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const instance = this.clone();
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yield* instance.decodeMulti(buffer);
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return;
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}
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try {
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this.entered = true;
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this.reinitializeState();
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this.setBuffer(buffer);
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while (this.hasRemaining(1)) {
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yield this.doDecodeSync();
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}
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}
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finally {
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this.entered = false;
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}
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}
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async decodeAsync(stream) {
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if (this.entered) {
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const instance = this.clone();
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return instance.decodeAsync(stream);
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}
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try {
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this.entered = true;
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let decoded = false;
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let object;
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for await (const buffer of stream) {
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if (decoded) {
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this.entered = false;
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throw this.createExtraByteError(this.totalPos);
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}
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this.appendBuffer(buffer);
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try {
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object = this.doDecodeSync();
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decoded = true;
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}
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catch (e) {
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if (!(e instanceof RangeError)) {
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throw e; // rethrow
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}
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// fallthrough
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}
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this.totalPos += this.pos;
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}
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if (decoded) {
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if (this.hasRemaining(1)) {
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throw this.createExtraByteError(this.totalPos);
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}
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return object;
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}
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const { headByte, pos, totalPos } = this;
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throw new RangeError(`Insufficient data in parsing ${prettyByte(headByte)} at ${totalPos} (${pos} in the current buffer)`);
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}
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finally {
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this.entered = false;
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}
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}
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decodeArrayStream(stream) {
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return this.decodeMultiAsync(stream, true);
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}
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decodeStream(stream) {
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return this.decodeMultiAsync(stream, false);
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}
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async *decodeMultiAsync(stream, isArray) {
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if (this.entered) {
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const instance = this.clone();
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yield* instance.decodeMultiAsync(stream, isArray);
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return;
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}
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try {
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this.entered = true;
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let isArrayHeaderRequired = isArray;
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let arrayItemsLeft = -1;
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for await (const buffer of stream) {
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if (isArray && arrayItemsLeft === 0) {
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throw this.createExtraByteError(this.totalPos);
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}
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this.appendBuffer(buffer);
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if (isArrayHeaderRequired) {
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arrayItemsLeft = this.readArraySize();
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isArrayHeaderRequired = false;
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this.complete();
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}
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try {
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while (true) {
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yield this.doDecodeSync();
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if (--arrayItemsLeft === 0) {
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break;
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}
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}
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}
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catch (e) {
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if (!(e instanceof RangeError)) {
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throw e; // rethrow
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}
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// fallthrough
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}
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this.totalPos += this.pos;
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}
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}
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finally {
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this.entered = false;
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}
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}
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doDecodeSync() {
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DECODE: while (true) {
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const headByte = this.readHeadByte();
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let object;
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if (headByte >= 0xe0) {
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// negative fixint (111x xxxx) 0xe0 - 0xff
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object = headByte - 0x100;
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}
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else if (headByte < 0xc0) {
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||||
if (headByte < 0x80) {
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||||
// positive fixint (0xxx xxxx) 0x00 - 0x7f
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object = headByte;
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||||
}
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||||
else if (headByte < 0x90) {
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||||
// fixmap (1000 xxxx) 0x80 - 0x8f
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||||
const size = headByte - 0x80;
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||||
if (size !== 0) {
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||||
this.pushMapState(size);
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||||
this.complete();
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||||
continue DECODE;
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||||
}
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||||
else {
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||||
object = {};
|
||||
}
|
||||
}
|
||||
else if (headByte < 0xa0) {
|
||||
// fixarray (1001 xxxx) 0x90 - 0x9f
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||||
const size = headByte - 0x90;
|
||||
if (size !== 0) {
|
||||
this.pushArrayState(size);
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||||
this.complete();
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continue DECODE;
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||||
}
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||||
else {
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||||
object = [];
|
||||
}
|
||||
}
|
||||
else {
|
||||
// fixstr (101x xxxx) 0xa0 - 0xbf
|
||||
const byteLength = headByte - 0xa0;
|
||||
object = this.decodeString(byteLength, 0);
|
||||
}
|
||||
}
|
||||
else if (headByte === 0xc0) {
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||||
// nil
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||||
object = null;
|
||||
}
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||||
else if (headByte === 0xc2) {
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||||
// false
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||||
object = false;
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||||
}
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||||
else if (headByte === 0xc3) {
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||||
// true
|
||||
object = true;
|
||||
}
|
||||
else if (headByte === 0xca) {
|
||||
// float 32
|
||||
object = this.readF32();
|
||||
}
|
||||
else if (headByte === 0xcb) {
|
||||
// float 64
|
||||
object = this.readF64();
|
||||
}
|
||||
else if (headByte === 0xcc) {
|
||||
// uint 8
|
||||
object = this.readU8();
|
||||
}
|
||||
else if (headByte === 0xcd) {
|
||||
// uint 16
|
||||
object = this.readU16();
|
||||
}
|
||||
else if (headByte === 0xce) {
|
||||
// uint 32
|
||||
object = this.readU32();
|
||||
}
|
||||
else if (headByte === 0xcf) {
|
||||
// uint 64
|
||||
if (this.useBigInt64) {
|
||||
object = this.readU64AsBigInt();
|
||||
}
|
||||
else {
|
||||
object = this.readU64();
|
||||
}
|
||||
}
|
||||
else if (headByte === 0xd0) {
|
||||
// int 8
|
||||
object = this.readI8();
|
||||
}
|
||||
else if (headByte === 0xd1) {
|
||||
// int 16
|
||||
object = this.readI16();
|
||||
}
|
||||
else if (headByte === 0xd2) {
|
||||
// int 32
|
||||
object = this.readI32();
|
||||
}
|
||||
else if (headByte === 0xd3) {
|
||||
// int 64
|
||||
if (this.useBigInt64) {
|
||||
object = this.readI64AsBigInt();
|
||||
}
|
||||
else {
|
||||
object = this.readI64();
|
||||
}
|
||||
}
|
||||
else if (headByte === 0xd9) {
|
||||
// str 8
|
||||
const byteLength = this.lookU8();
|
||||
object = this.decodeString(byteLength, 1);
|
||||
}
|
||||
else if (headByte === 0xda) {
|
||||
// str 16
|
||||
const byteLength = this.lookU16();
|
||||
object = this.decodeString(byteLength, 2);
|
||||
}
|
||||
else if (headByte === 0xdb) {
|
||||
// str 32
|
||||
const byteLength = this.lookU32();
|
||||
object = this.decodeString(byteLength, 4);
|
||||
}
|
||||
else if (headByte === 0xdc) {
|
||||
// array 16
|
||||
const size = this.readU16();
|
||||
if (size !== 0) {
|
||||
this.pushArrayState(size);
|
||||
this.complete();
|
||||
continue DECODE;
|
||||
}
|
||||
else {
|
||||
object = [];
|
||||
}
|
||||
}
|
||||
else if (headByte === 0xdd) {
|
||||
// array 32
|
||||
const size = this.readU32();
|
||||
if (size !== 0) {
|
||||
this.pushArrayState(size);
|
||||
this.complete();
|
||||
continue DECODE;
|
||||
}
|
||||
else {
|
||||
object = [];
|
||||
}
|
||||
}
|
||||
else if (headByte === 0xde) {
|
||||
// map 16
|
||||
const size = this.readU16();
|
||||
if (size !== 0) {
|
||||
this.pushMapState(size);
|
||||
this.complete();
|
||||
continue DECODE;
|
||||
}
|
||||
else {
|
||||
object = {};
|
||||
}
|
||||
}
|
||||
else if (headByte === 0xdf) {
|
||||
// map 32
|
||||
const size = this.readU32();
|
||||
if (size !== 0) {
|
||||
this.pushMapState(size);
|
||||
this.complete();
|
||||
continue DECODE;
|
||||
}
|
||||
else {
|
||||
object = {};
|
||||
}
|
||||
}
|
||||
else if (headByte === 0xc4) {
|
||||
// bin 8
|
||||
const size = this.lookU8();
|
||||
object = this.decodeBinary(size, 1);
|
||||
}
|
||||
else if (headByte === 0xc5) {
|
||||
// bin 16
|
||||
const size = this.lookU16();
|
||||
object = this.decodeBinary(size, 2);
|
||||
}
|
||||
else if (headByte === 0xc6) {
|
||||
// bin 32
|
||||
const size = this.lookU32();
|
||||
object = this.decodeBinary(size, 4);
|
||||
}
|
||||
else if (headByte === 0xd4) {
|
||||
// fixext 1
|
||||
object = this.decodeExtension(1, 0);
|
||||
}
|
||||
else if (headByte === 0xd5) {
|
||||
// fixext 2
|
||||
object = this.decodeExtension(2, 0);
|
||||
}
|
||||
else if (headByte === 0xd6) {
|
||||
// fixext 4
|
||||
object = this.decodeExtension(4, 0);
|
||||
}
|
||||
else if (headByte === 0xd7) {
|
||||
// fixext 8
|
||||
object = this.decodeExtension(8, 0);
|
||||
}
|
||||
else if (headByte === 0xd8) {
|
||||
// fixext 16
|
||||
object = this.decodeExtension(16, 0);
|
||||
}
|
||||
else if (headByte === 0xc7) {
|
||||
// ext 8
|
||||
const size = this.lookU8();
|
||||
object = this.decodeExtension(size, 1);
|
||||
}
|
||||
else if (headByte === 0xc8) {
|
||||
// ext 16
|
||||
const size = this.lookU16();
|
||||
object = this.decodeExtension(size, 2);
|
||||
}
|
||||
else if (headByte === 0xc9) {
|
||||
// ext 32
|
||||
const size = this.lookU32();
|
||||
object = this.decodeExtension(size, 4);
|
||||
}
|
||||
else {
|
||||
throw new DecodeError(`Unrecognized type byte: ${prettyByte(headByte)}`);
|
||||
}
|
||||
this.complete();
|
||||
const stack = this.stack;
|
||||
while (stack.length > 0) {
|
||||
// arrays and maps
|
||||
const state = stack.top();
|
||||
if (state.type === STATE_ARRAY) {
|
||||
state.array[state.position] = object;
|
||||
state.position++;
|
||||
if (state.position === state.size) {
|
||||
object = state.array;
|
||||
stack.release(state);
|
||||
}
|
||||
else {
|
||||
continue DECODE;
|
||||
}
|
||||
}
|
||||
else if (state.type === STATE_MAP_KEY) {
|
||||
if (object === "__proto__") {
|
||||
throw new DecodeError("The key __proto__ is not allowed");
|
||||
}
|
||||
state.key = this.mapKeyConverter(object);
|
||||
state.type = STATE_MAP_VALUE;
|
||||
continue DECODE;
|
||||
}
|
||||
else {
|
||||
// it must be `state.type === State.MAP_VALUE` here
|
||||
state.map[state.key] = object;
|
||||
state.readCount++;
|
||||
if (state.readCount === state.size) {
|
||||
object = state.map;
|
||||
stack.release(state);
|
||||
}
|
||||
else {
|
||||
state.key = null;
|
||||
state.type = STATE_MAP_KEY;
|
||||
continue DECODE;
|
||||
}
|
||||
}
|
||||
}
|
||||
return object;
|
||||
}
|
||||
}
|
||||
readHeadByte() {
|
||||
if (this.headByte === HEAD_BYTE_REQUIRED) {
|
||||
this.headByte = this.readU8();
|
||||
// console.log("headByte", prettyByte(this.headByte));
|
||||
}
|
||||
return this.headByte;
|
||||
}
|
||||
complete() {
|
||||
this.headByte = HEAD_BYTE_REQUIRED;
|
||||
}
|
||||
readArraySize() {
|
||||
const headByte = this.readHeadByte();
|
||||
switch (headByte) {
|
||||
case 0xdc:
|
||||
return this.readU16();
|
||||
case 0xdd:
|
||||
return this.readU32();
|
||||
default: {
|
||||
if (headByte < 0xa0) {
|
||||
return headByte - 0x90;
|
||||
}
|
||||
else {
|
||||
throw new DecodeError(`Unrecognized array type byte: ${prettyByte(headByte)}`);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
pushMapState(size) {
|
||||
if (size > this.maxMapLength) {
|
||||
throw new DecodeError(`Max length exceeded: map length (${size}) > maxMapLengthLength (${this.maxMapLength})`);
|
||||
}
|
||||
this.stack.pushMapState(size);
|
||||
}
|
||||
pushArrayState(size) {
|
||||
if (size > this.maxArrayLength) {
|
||||
throw new DecodeError(`Max length exceeded: array length (${size}) > maxArrayLength (${this.maxArrayLength})`);
|
||||
}
|
||||
this.stack.pushArrayState(size);
|
||||
}
|
||||
decodeString(byteLength, headerOffset) {
|
||||
if (!this.rawStrings || this.stateIsMapKey()) {
|
||||
return this.decodeUtf8String(byteLength, headerOffset);
|
||||
}
|
||||
return this.decodeBinary(byteLength, headerOffset);
|
||||
}
|
||||
/**
|
||||
* @throws {@link RangeError}
|
||||
*/
|
||||
decodeUtf8String(byteLength, headerOffset) {
|
||||
if (byteLength > this.maxStrLength) {
|
||||
throw new DecodeError(`Max length exceeded: UTF-8 byte length (${byteLength}) > maxStrLength (${this.maxStrLength})`);
|
||||
}
|
||||
if (this.bytes.byteLength < this.pos + headerOffset + byteLength) {
|
||||
throw MORE_DATA;
|
||||
}
|
||||
const offset = this.pos + headerOffset;
|
||||
let object;
|
||||
if (this.stateIsMapKey() && this.keyDecoder?.canBeCached(byteLength)) {
|
||||
object = this.keyDecoder.decode(this.bytes, offset, byteLength);
|
||||
}
|
||||
else {
|
||||
object = utf8Decode(this.bytes, offset, byteLength);
|
||||
}
|
||||
this.pos += headerOffset + byteLength;
|
||||
return object;
|
||||
}
|
||||
stateIsMapKey() {
|
||||
if (this.stack.length > 0) {
|
||||
const state = this.stack.top();
|
||||
return state.type === STATE_MAP_KEY;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
/**
|
||||
* @throws {@link RangeError}
|
||||
*/
|
||||
decodeBinary(byteLength, headOffset) {
|
||||
if (byteLength > this.maxBinLength) {
|
||||
throw new DecodeError(`Max length exceeded: bin length (${byteLength}) > maxBinLength (${this.maxBinLength})`);
|
||||
}
|
||||
if (!this.hasRemaining(byteLength + headOffset)) {
|
||||
throw MORE_DATA;
|
||||
}
|
||||
const offset = this.pos + headOffset;
|
||||
const object = this.bytes.subarray(offset, offset + byteLength);
|
||||
this.pos += headOffset + byteLength;
|
||||
return object;
|
||||
}
|
||||
decodeExtension(size, headOffset) {
|
||||
if (size > this.maxExtLength) {
|
||||
throw new DecodeError(`Max length exceeded: ext length (${size}) > maxExtLength (${this.maxExtLength})`);
|
||||
}
|
||||
const extType = this.view.getInt8(this.pos + headOffset);
|
||||
const data = this.decodeBinary(size, headOffset + 1 /* extType */);
|
||||
return this.extensionCodec.decode(data, extType, this.context);
|
||||
}
|
||||
lookU8() {
|
||||
return this.view.getUint8(this.pos);
|
||||
}
|
||||
lookU16() {
|
||||
return this.view.getUint16(this.pos);
|
||||
}
|
||||
lookU32() {
|
||||
return this.view.getUint32(this.pos);
|
||||
}
|
||||
readU8() {
|
||||
const value = this.view.getUint8(this.pos);
|
||||
this.pos++;
|
||||
return value;
|
||||
}
|
||||
readI8() {
|
||||
const value = this.view.getInt8(this.pos);
|
||||
this.pos++;
|
||||
return value;
|
||||
}
|
||||
readU16() {
|
||||
const value = this.view.getUint16(this.pos);
|
||||
this.pos += 2;
|
||||
return value;
|
||||
}
|
||||
readI16() {
|
||||
const value = this.view.getInt16(this.pos);
|
||||
this.pos += 2;
|
||||
return value;
|
||||
}
|
||||
readU32() {
|
||||
const value = this.view.getUint32(this.pos);
|
||||
this.pos += 4;
|
||||
return value;
|
||||
}
|
||||
readI32() {
|
||||
const value = this.view.getInt32(this.pos);
|
||||
this.pos += 4;
|
||||
return value;
|
||||
}
|
||||
readU64() {
|
||||
const value = getUint64(this.view, this.pos);
|
||||
this.pos += 8;
|
||||
return value;
|
||||
}
|
||||
readI64() {
|
||||
const value = getInt64(this.view, this.pos);
|
||||
this.pos += 8;
|
||||
return value;
|
||||
}
|
||||
readU64AsBigInt() {
|
||||
const value = this.view.getBigUint64(this.pos);
|
||||
this.pos += 8;
|
||||
return value;
|
||||
}
|
||||
readI64AsBigInt() {
|
||||
const value = this.view.getBigInt64(this.pos);
|
||||
this.pos += 8;
|
||||
return value;
|
||||
}
|
||||
readF32() {
|
||||
const value = this.view.getFloat32(this.pos);
|
||||
this.pos += 4;
|
||||
return value;
|
||||
}
|
||||
readF64() {
|
||||
const value = this.view.getFloat64(this.pos);
|
||||
this.pos += 8;
|
||||
return value;
|
||||
}
|
||||
}
|
||||
//# sourceMappingURL=Decoder.mjs.map
|
||||
Reference in New Issue
Block a user