86 lines
2.7 KiB
TypeScript
86 lines
2.7 KiB
TypeScript
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import { Response } from 'express';
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import { PdfFile } from '@stirling-pdf/shared-operations/src/wrappers/PdfFile'
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import Archiver from 'archiver';
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export async function respondWithFile(res: Response, uint8Array: Uint8Array, filename: string, mimeType: string): Promise<void> {
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res.writeHead(200, {
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'Content-Type': mimeType,
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'Content-disposition': `attachment; filename="${filename}"`,
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'Content-Length': uint8Array.length
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});
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res.end(uint8Array);
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}
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export async function respondWithPdfFile(res: Response, file: PdfFile): Promise<void> {
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const byteArray = await file.uint8Array;
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respondWithFile(res, byteArray, file.filename+".pdf", "application/pdf");
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}
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export async function respondWithZip(res: Response, filename: string, files: {uint8Array: Uint8Array, filename: string}[]): Promise<void> {
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if (files.length == 0) {
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res.status(500).json({"warning": "The workflow had no outputs."});
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return;
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}
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console.log(filename)
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res.writeHead(200, {
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'Content-Type': 'application/zip',
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'Content-disposition': `attachment; filename="${filename}.zip"`,
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});
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// TODO: Also allow changing the compression level
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var zip = Archiver('zip');
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// Stream the file to the user.
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zip.pipe(res);
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console.log("Adding Files to ZIP...");
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for (let i = 0; i < files.length; i++) {
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zip.append(Buffer.from(files[i].uint8Array), { name: files[i].filename });
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}
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zip.finalize();
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console.log("Sent");
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}
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export async function respondWithPdfFiles(res: Response, pdfFiles: PdfFile[] | undefined, filename: string) {
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if(!pdfFiles || pdfFiles.length == 0) {
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res.status(500).json({"warning": "The workflow had no outputs."});
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}
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else if (pdfFiles.length == 1) {
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respondWithPdfFile(res, pdfFiles[0])
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}
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else {
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const promises = pdfFiles.map(async (pdf) => {return{uint8Array: await pdf.uint8Array, filename: pdf.filename + ".pdf"}})
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const files = await Promise.all(promises);
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respondWithZip(res, filename, files);
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}
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}
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export function response_mustHaveExactlyOneFile(res: Response): void {
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res.status(400).send([
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{
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"message": "file is required",
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"path": [
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"pdfFile"
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],
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"type": "file",
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"context": {
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"label": "pdfFile",
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"key": "pdfFile"
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}
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}
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]);
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}
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export function response_dependencyNotConfigured(res: Response, dependencyName: string): void {
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res.status(400).send([
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{
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"message": `${dependencyName} is not configured correctly on the server.`,
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"type": "dependency_error",
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}
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]);
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}
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