mirrors/pdf.js
1
0
Fork 0
mirror of https://github.com/mozilla/pdf.js.git synced 2025-04-25 09:38:06 +02:00
Code Activity

When parsing corrupt documents, avoid inserting obviously broken data in the XRef-table (issue 13783)

Browse source 
In cases where even the very *first* attempt at reading from an object will throw, simply ignoring such objects will help improve rendering of *some* corrupt documents.
Note that this will lead to more parsing in some cases, but considering that this only applies to *corrupt* documents that shouldn't be a big deal.
This commit is contained in:
Jonas Jenwald 2021-07-23 17:37:55 +02:00
parent 51f0a81085
commit b82c802dff
5 changed files with 51 additions and 10 deletions
Download patch file Download diff file Expand all files Collapse all files

18
src/core/parser.js
View file

@ -33,7 +33,11 @@ import {
Name,
Ref,
} from "./primitives.js";
import { isWhiteSpace, MissingDataException } from "./core_utils.js";
import {
isWhiteSpace,
MissingDataException,
ParserEOFException,
} from "./core_utils.js";
import { Ascii85Stream } from "./ascii_85_stream.js";
import { AsciiHexStream } from "./ascii_hex_stream.js";
import { CCITTFaxStream } from "./ccitt_stream.js";
@ -124,10 +128,10 @@ class Parser {
array.push(this.getObj(cipherTransform));
}
if (isEOF(this.buf1)) {
if (!this.recoveryMode) {
throw new FormatError("End of file inside array");
if (this.recoveryMode) {
return array;
}
return array;
throw new ParserEOFException("End of file inside array.");
}
this.shift();
return array;
@ -148,10 +152,10 @@ class Parser {
dict.set(key, this.getObj(cipherTransform));
}
if (isEOF(this.buf1)) {
if (!this.recoveryMode) {
throw new FormatError("End of file inside dictionary");
if (this.recoveryMode) {
return dict;
}
return dict;
throw new ParserEOFException("End of file inside dictionary.");
}
// Stream objects are not allowed inside content streams or