Merge pull request #128 from aspose-pdf-cloud/pdfcloud-4840-added-use-cases-for-compress-pdf

PDFCLOUD-4840: added use cases for Compress PDF

Author: kaferi

UsesCases/CompressDocument/compressPdf.js

@@ -0,0 +1,65 @@
+import credentials from "../../../Credentials/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 "../../src/api/api.js";
+import { OptimizeOptions } from "../../src/models/optimizeOptions.js";
+
+const configParams = {
+    LOCAL_FOLDER: "C:\\Samples\\",
+    PDF_DOCUMENT_NAME: "sample.pdf",
+    TEMP_FOLDER : 'TempPdfCloud',
+    LOCAL_RESULT_DOCUMENT_NAME: "output_sample.pdf",
+};
+
+const pdfApi = new PdfApi(credentials.id, credentials.key);
+
+const PdfCompress = {
+    async uploadDocument (fileName, localFolder) {
+        const fileNamePath = path.join(configParams.LOCAL_FOLDER, configParams.PDF_DOCUMENT_NAME);
+        const fileData = await fs.readFile(fileNamePath);
+        const storagePath = path.join(configParams.TEMP_FOLDER, configParams.PDF_DOCUMENT_NAME);
+        await pdfApi.uploadFile(storagePath, fileData)
+            .then(() => console.log("File: '" + configParams.PDF_DOCUMENT_NAME +"' successfully uploaded."));
+    },
+
+    async downloadResult() {
+        const fileName = path.join( configParams.TEMP_FOLDER, configParams.PDF_DOCUMENT_NAME);
+        const changedPdfData = await pdfApi.downloadFile(fileName);
+        const filePath = path.join(configParams.LOCAL_FOLDER, configParams.LOCAL_RESULT_DOCUMENT_NAME);
+        await fs.writeFile(filePath, changedPdfData.body);
+        console.log("Downloaded: " + filePath);
+    },
+
+    async compressPdfDocument() {
+        if ( pdfApi ) {
+
+            const optimizeOptions = new OptimizeOptions();
+            optimizeOptions.allowReusePageContent = true;
+            optimizeOptions.compressImages = true;
+            optimizeOptions.imageQuality = 100;
+            optimizeOptions.linkDuplcateStreams = true;
+            optimizeOptions.removeUnusedObjects = true;
+            optimizeOptions.removeUnusedStreams = true;            
+            optimizeOptions.unembedFonts = true;
+  
+            const response = await pdfApi.postOptimizeDocument(configParams.PDF_DOCUMENT_NAME, optimizeOptions, null, configParams.TEMP_FOLDER);
+            if (response.body.code != 200)
+                console.error("compressPdfDocument(): Failed to compress the PDF document!");
+            else
+                console.log("compressPdfDocument(): Successfully copressed the PDF document '" + configParams.PDF_DOCUMENT_NAME + "' !");
+        }
+    },
+};
+
+async function main() {
+    try {
+        await PdfCompress.uploadDocument();
+        await PdfCompress.compressPdfDocument();
+        await PdfCompress.downloadResult();
+
+    } catch (error) {
+        console.error("Error:", error.message);
+    }
+}
+
+main();