Google Apps Script で PDF をテキスト化する

はじめに

GASでPDFの内容を読み取りたい！と思った時に書いたコードの記録

コード

export class PDFService {

	toStringByFileId(fileId: string): string {
		const blob: GoogleAppsScript.Base.Blob = DriveApp.getFileById(fileId).getBlob();
		const resource: any = {
			title: blob.getName(),
			mimeType: blob.getContentType(),
		};
		const doc: GoogleAppsScript.Document.Document = this.toDoc(resource, blob, 'ja');
		return doc.getBody().getText();
	}

	private toDoc(resource: any, blob: GoogleAppsScript.Base.Blob, language: string): GoogleAppsScript.Document.Document {
		const options: any = {ocr: true, ocrLanguage: language};
		try {
			const file: GoogleAppsScript.Drive.Schema.File = Drive.Files.insert(resource, blob, options);
			return DocumentApp.openById(file.id);
		} catch(e: any) {
			console.error(e);
		}
	}
}