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feat: fix mmkv parser, support for ios ekey mmkv

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鲁树人
2023-06-15 19:30:33 +01:00
parent f787e1c3f8
commit 8db5b64b38
6 changed files with 36 additions and 10 deletions
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21
src/util/MMKVParser.ts
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@@ -1,28 +1,29 @@
import { formatHex } from './formatHex';
const textDecoder = new TextDecoder('utf-8', { ignoreBOM: true });
export class MMKVParser {
private offset = 8;
private offset = 4;
private length: number;
constructor(private view: DataView) {
const payloadLength = view.getUint32(0, true);
this.length = 4 + payloadLength;
// skip unused str
this.readInt();
}
toString() {
const offset = this.offset.toString(16).padStart(8, '0');
const length = this.length.toString(16).padStart(8, '0');
return `<MMKVParser offset=0x${offset} len=0x${length}>`;
const offset = formatHex(this.offset, 8);
const length = formatHex(this.length, 8);
return `<MMKVParser offset=${offset} len=${length}>`;
}
get eof() {
return this.offset >= this.length;
}
peek() {
return this.view.getUint8(this.offset);
}
public readByte() {
return this.view.getUint8(this.offset++);
}
@@ -77,7 +78,9 @@ export class MMKVParser {
const newOffset = this.offset + containerLen;
const result = this.readString();
if (newOffset !== this.offset) {
throw new Error('readVariantString failed: offset does not match');
const expected = formatHex(newOffset);
const actual = formatHex(this.offset);
throw new Error(`readVariantString failed: offset does mismatch (expect: ${expected}, actual: ${actual})`);
}
return result;
}