File size: 4,056 Bytes
1b756c8 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 | import { ClassicPreset } from 'rete';
import { BaseWorkflowNode } from './base-node';
import { pdfSocket } from '../sockets';
import type { PDFData, SocketData, MultiPDFData } from '../types';
import { PDFDocument } from 'pdf-lib';
import { readFileAsArrayBuffer, initializeQpdf } from '../../utils/helpers.js';
export class EncryptedPDFError extends Error {
constructor(public readonly filename: string) {
super(`PDF "${filename}" is password-protected`);
this.name = 'EncryptedPDFError';
}
}
export class PDFInputNode extends BaseWorkflowNode {
readonly category = 'Input' as const;
readonly icon = 'ph-file-pdf';
readonly description = 'Upload one or more PDF files';
private files: PDFData[] = [];
constructor() {
super('PDF Input');
this.addOutput('pdf', new ClassicPreset.Output(pdfSocket, 'PDF'));
}
async addFile(file: File): Promise<void> {
const arrayBuffer = await readFileAsArrayBuffer(file);
const bytes = new Uint8Array(arrayBuffer as ArrayBuffer);
let isEncrypted = false;
try {
await PDFDocument.load(bytes, { throwOnInvalidObject: false });
} catch {
isEncrypted = true;
}
if (isEncrypted) {
try {
await PDFDocument.load(bytes, {
ignoreEncryption: true,
throwOnInvalidObject: false,
});
} catch {
throw new Error(
`Failed to load "${file.name}" - file may be corrupted`
);
}
throw new EncryptedPDFError(file.name);
}
const document = await PDFDocument.load(bytes, {
throwOnInvalidObject: false,
});
this.files.push({
type: 'pdf',
document,
bytes,
filename: file.name,
});
}
async addDecryptedFile(file: File, password: string): Promise<void> {
const arrayBuffer = await readFileAsArrayBuffer(file);
const bytes = new Uint8Array(arrayBuffer as ArrayBuffer);
const qpdf = await initializeQpdf();
const uid = `${Date.now()}_${Math.random().toString(36).slice(2, 9)}`;
const inputPath = `/tmp/input_decrypt_${uid}.pdf`;
const outputPath = `/tmp/output_decrypt_${uid}.pdf`;
try {
qpdf.FS.writeFile(inputPath, bytes);
qpdf.callMain([
inputPath,
'--password=' + password,
'--decrypt',
outputPath,
]);
const decryptedData = qpdf.FS.readFile(outputPath, {
encoding: 'binary',
});
const decryptedBytes = new Uint8Array(decryptedData);
const document = await PDFDocument.load(decryptedBytes, {
throwOnInvalidObject: false,
});
this.files.push({
type: 'pdf',
document,
bytes: decryptedBytes,
filename: file.name,
});
} finally {
try {
qpdf.FS.unlink(inputPath);
} catch {
/* cleanup */
}
try {
qpdf.FS.unlink(outputPath);
} catch {
/* cleanup */
}
}
}
async setFile(file: File): Promise<void> {
this.files = [];
await this.addFile(file);
}
async setFiles(fileList: File[]): Promise<void> {
this.files = [];
for (const file of fileList) {
await this.addFile(file);
}
}
removeFile(index: number): void {
this.files.splice(index, 1);
}
hasFile(): boolean {
return this.files.length > 0;
}
getFileCount(): number {
return this.files.length;
}
getFilenames(): string[] {
return this.files.map((f) => f.filename);
}
getFilename(): string {
if (this.files.length === 0) return '';
if (this.files.length === 1) return this.files[0].filename;
return `${this.files.length} files`;
}
async data(
_inputs: Record<string, SocketData[]>
): Promise<Record<string, SocketData>> {
if (this.files.length === 0) {
throw new Error('No PDF files uploaded in PDF Input node');
}
if (this.files.length === 1) {
return { pdf: this.files[0] };
}
const multiData: MultiPDFData = {
type: 'multi-pdf',
items: this.files,
};
return { pdf: multiData };
}
}
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