使用 Node.js SDK 从 PDF 中提取附件

    import credentials from "./credentials.json" with { type: "json" };
    import fs from 'node:fs/promises';
    import path from 'node:path';
    import { PdfApi } from "asposepdfcloud";
    import { AttachmentInfo } from "asposepdfcloud/src/models/attachmentInfo.js";

    async function getAllAttachments() {
        const LOCAL_PATH = "C:\\Samples\\";
        const LOCAL_FILE_NAME = "C:\\Samples\\Attachments\\sample_attachment.pdf";
        const STORAGE_FILE_NAME = "sample_attachment.pdf";
        try {
            const pdfApi = new PdfApi(credentials.id, credentials.key);
            const pdfData = await fs.readFile(LOCAL_FILE_NAME);
            await pdfApi.uploadFile(STORAGE_FILE_NAME, pdfData);

            const result = await pdfApi.getDocumentAttachments(STORAGE_FILE_NAME);

            if (result.body.code === 200 && result.body.attachments) {
                const attachmentList = result.body.attachments.list || [];
                if (!attachmentList.length) {
                    console.error("No attachments found.");
                    return;
                }

                const downloadTasks = attachmentList.map(async (attachment) => {
                    try {
                        const attachmentUrl = attachment.links[0].href;
                        const info = await pdfApi.getDocumentAttachmentByIndex(STORAGE_FILE_NAME, attachmentUrl);
                        const download = await pdfApi.getDownloadDocumentAttachmentByIndex(STORAGE_FILE_NAME, attachmentUrl);
                        await fs.writeFile(path.join(LOCAL_PATH, info.body.attachment.name), download.body);
                    } catch (error) {
                        console.error("Failed to download attachment:", error);
                    }
                });

                await Promise.all(downloadTasks);
            } else {
                console.error("Failed to retrieve attachments. Status:", result.statusCode);
            }
        } catch (error) {
            console.error("Error processing PDF attachments:", error);
        }
    }