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Update pdf-repair example and fix cross-reference stream index count #106

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merged 2 commits into from
Nov 7, 2023
Merged

Update pdf-repair example and fix cross-reference stream index count #106

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9dfc4e2
chore: update `pdf-repair` example
microshine Nov 7, 2023
a5867b4
fix: cross-reference stream index count
microshine Nov 7, 2023
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10 changes: 9 additions & 1 deletion packages/core/src/structure/CrossReferenceStream.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -329,8 +329,16 @@ export class CrossReferenceStream extends PDFStream implements CrossReference {

const indexes = this.Index || [{ start: 0, size: this.Size }];

// Some documents may have more indexes in the cross-reference stream than represented in the Index,
// which can lead to errors. To avoid this, we pre-determine the number of objects (totalCount) and
// exit the loop if we reach this count.
let totalCount = 0;
for (const index of indexes) {
totalCount += index.size;
}

let count = 0;
while (!streamDataReader.isEOF) {
while (!streamDataReader.isEOF && count < totalCount) {
const field1 = num(streamDataReader.read(w[0]), 1);
const field2 = num(streamDataReader.read(w[1]));
const field3 = num(streamDataReader.read(w[2]));
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5 changes: 3 additions & 2 deletions packages/repair/README.md
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Expand Up @@ -17,7 +17,7 @@ npm install @peculiarventures/pdf-repair

## Usage

Example usage of `@peculiarventures/pdf-repair``:
Example usage of `@peculiarventures/pdf-repair`:

```javascript
const fs = require('fs');
Expand All @@ -28,7 +28,8 @@ const data = fs.readFileSync("file.pdf");
const doc = PDFDocument.load(data);

const repair = new PDFRepair();
repair.repairDocument(doc);
const repairNotes = await repair.repairDocument(doc);
console.log(repairNotes);

const raw = doc.save();
fs.writeFileSync("newFile.pdf", raw, { flag: "w+" });
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