wehub-resource-sync
134 lines
4.0 KiB
Plaintext
134 lines
4.0 KiB
Plaintext
---
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title: "Convert documents to PDF using LibreOffice"
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sidebarTitle: "LibreOffice PDF conversion"
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description: "This example demonstrates how to convert documents to PDF using LibreOffice with Trigger.dev."
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---
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import LocalDevelopment from "/snippets/local-development-extensions.mdx";
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## Prerequisites
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- A project with [Trigger.dev initialized](/quick-start)
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- [LibreOffice](https://www.libreoffice.org/download/download-libreoffice/) installed on your machine
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- A [Cloudflare R2](https://developers.cloudflare.com) account and bucket
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### Using our `aptGet` build extension to add the LibreOffice package
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To deploy this task, you'll need to add LibreOffice to your project configuration, like this:
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```ts trigger.config.ts
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import { aptGet } from "@trigger.dev/build/extensions/core";
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import { defineConfig } from "@trigger.dev/sdk";
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export default defineConfig({
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project: "<project ref>",
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// Your other config settings...
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build: {
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extensions: [
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aptGet({
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packages: ["libreoffice"],
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}),
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],
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},
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});
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```
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<Note>
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[Build extensions](/config/extensions/overview) allow you to hook into the build system and
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customize the build process or the resulting bundle and container image (in the case of
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deploying). You can use pre-built extensions or create your own.
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</Note>
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You'll also need to add `@trigger.dev/build` to your `package.json` file under `devDependencies` if you don't already have it there.
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## Convert a document to PDF using LibreOffice and upload to R2
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This task demonstrates how to use LibreOffice to convert a document (.doc or .docx) to PDF and upload the PDF to an R2 storage bucket.
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### Key Features
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- Fetches a document from a given URL
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- Converts the document to PDF
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- Uploads the PDF to R2 storage
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### Task code
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```ts trigger/libreoffice-pdf-convert.ts
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import { PutObjectCommand, S3Client } from "@aws-sdk/client-s3";
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import { task } from "@trigger.dev/sdk";
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import libreoffice from "libreoffice-convert";
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import { promisify } from "node:util";
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import path from "path";
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import fs from "fs";
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const convert = promisify(libreoffice.convert);
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// Initialize S3 client
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const s3Client = new S3Client({
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// How to authenticate to R2: https://developers.cloudflare.com/r2/api/s3/tokens/
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region: "auto",
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endpoint: process.env.R2_ENDPOINT,
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credentials: {
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accessKeyId: process.env.R2_ACCESS_KEY_ID ?? "",
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secretAccessKey: process.env.R2_SECRET_ACCESS_KEY ?? "",
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},
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});
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export const libreOfficePdfConvert = task({
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id: "libreoffice-pdf-convert",
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run: async (payload: { documentUrl: string }, { ctx }) => {
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// Set LibreOffice path for production environment
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if (ctx.environment.type !== "DEVELOPMENT") {
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process.env.LIBREOFFICE_PATH = "/usr/bin/libreoffice";
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}
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try {
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// Create temporary file paths
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const inputPath = path.join(process.cwd(), `input_${Date.now()}.docx`);
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const outputPath = path.join(process.cwd(), `output_${Date.now()}.pdf`);
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// Download file from URL
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const response = await fetch(payload.documentUrl);
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const buffer = Buffer.from(await response.arrayBuffer());
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fs.writeFileSync(inputPath, buffer);
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const inputFile = fs.readFileSync(inputPath);
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// Convert to PDF using LibreOffice
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const pdfBuffer = await convert(inputFile, ".pdf", undefined);
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fs.writeFileSync(outputPath, pdfBuffer);
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// Upload to R2
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const key = `converted-pdfs/output_${Date.now()}.pdf`;
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await s3Client.send(
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new PutObjectCommand({
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Bucket: process.env.R2_BUCKET,
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Key: key,
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Body: fs.readFileSync(outputPath),
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})
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);
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// Cleanup temporary files
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fs.unlinkSync(inputPath);
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fs.unlinkSync(outputPath);
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return { pdfLocation: key };
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} catch (error) {
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console.error("Error converting PDF:", error);
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throw error;
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}
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},
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});
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```
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### Testing your task
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To test this task, use this payload structure:
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```json
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{
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"documentUrl": "<a-document-url>" // Replace <a-document-url> with the URL of the document you want to convert
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}
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```
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<LocalDevelopment packages={"libreoffice"} />
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