Thêm Hình ảnh vào Tiêu đề của PDF trong Node.js SDK

    import credentials from "./credentials.json"  with { type: "json" };    // json-file in this format: { "id": "*****", "key": "*******" }
    import fs from 'node:fs/promises';
    import path from 'node:path';
    import { PdfApi } from "asposepdfcloud";
    import { ImageHeader } from "asposepdfcloud/src/models/imageHeader.js";
    import { HorizontalAlignment } from "asposepdfcloud/src/models/horizontalAlignment.js";

    const configParams = {
        LOCAL_FOLDER: "C:\\Samples\\",
        PDF_DOCUMENT_NAME: "sample.pdf",
        LOCAL_RESULT_DOCUMENT_NAME: "output_sample.pdf",
        IMAGE_HEADER_FILE: "sample.png",
        PAGE_NUMBER: 2,     // Your document page number...
    };

    const pdfApi = new PdfApi(credentials.id, credentials.key);

    const pdfHederFooter = {
        async uploadFile (fileName) {
            const pdfFileData = await fs.readFile(configParams.LOCAL_FOLDER + fileName);
            await pdfApi.uploadFile(fileName, pdfFileData);
        },

        async uploadDocument () {
            await pdfHederFooter.uploadFile(configParams.PDF_DOCUMENT_NAME);
        },

        async downloadResult() {
            const changedPdfData = await pdfApi.downloadFile(configParams.PDF_DOCUMENT_NAME);
            const filePath = path.join(configParams.LOCAL_FOLDER, configParams.LOCAL_RESULT_DOCUMENT_NAME);
            await fs.writeFile(filePath, changedPdfData.body);
            console.log("Downloaded: " + filePath);
        },

        async adddImageHeader () {
            const imageHeader = new ImageHeader();
            imageHeader.background = true;
            imageHeader.value = "TEST HEADER VALUE";
            imageHeader.horizontalAlignment = HorizontalAlignment.Center;
            imageHeader.fileName = configParams.IMAGE_HEADER_FILE;
            imageHeader.width = 24;
            imageHeader.height = 24;

            const resultLinks = await pdfApi.postDocumentImageHeader(configParams.PDF_DOCUMENT_NAME, imageHeader);

            if (resultLinks.body.code == 200) {
                return resultLinks.body;
            }
            else
                throw new Error("Unexpected error : can't append Text Header!");
        },
    }

    async function main() {
        try {
            await pdfHederFooter.uploadDocument();
            await pdfHederFooter.uploadFile(configParams.IMAGE_HEADER_FILE);
            await pdfHederFooter.adddImageHeader();
            await pdfHederFooter.downloadResult();
        } catch (error) {
            console.error("Error:", error.message);
        }
    }