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Merge remote-tracking branch 'stirling-pdf-rewrite/main' into stirling-pdf-rewrite

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.gitignore vendored
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### Eclipse ###
.metadata
bin/
tmp/
*.tmp
*.bak
*.swp
*~.nib
local.properties
.settings/
.loadpath
.recommenders
.classpath
.project
version.properties
pipeline/
#### Stirling-PDF Files ###
customFiles/
configs/
watchedFolders/
# Gradle
.gradle
.lock
# External tool builders
.externalToolBuilders/
# Locally stored "Eclipse launch configurations"
*.launch
# PyDev specific (Python IDE for Eclipse)
*.pydevproject
# CDT-specific (C/C++ Development Tooling)
.cproject
# CDT- autotools
.autotools
# Java annotation processor (APT)
.factorypath
# PDT-specific (PHP Development Tools)
.buildpath
# sbteclipse plugin
.target
# Tern plugin
.tern-project
# TeXlipse plugin
.texlipse
# STS (Spring Tool Suite)
.springBeans
# Code Recommenders
.recommenders/
# Annotation Processing
.apt_generated/
.apt_generated_test/
# Scala IDE specific (Scala & Java development for Eclipse)
.cache-main
.scala_dependencies
.worksheet
# Uncomment this line if you wish to ignore the project description file.
# Typically, this file would be tracked if it contains build/dependency configurations:
#.project
### Eclipse Patch ###
# Spring Boot Tooling
.sts4-cache/
### Git ###
# Created by git for backups. To disable backups in Git:
# $ git config --global mergetool.keepBackup false
*.orig
# Created by git when using merge tools for conflicts
*.BACKUP.*
*.BASE.*
*.LOCAL.*
*.REMOTE.*
*_BACKUP_*.txt
*_BASE_*.txt
*_LOCAL_*.txt
*_REMOTE_*.txt
### Java ###
# Compiled class file
*.class
# Log file
*.log
# BlueJ files
*.ctxt
# Mobile Tools for Java (J2ME)
.mtj.tmp/
# Package Files #
*.jar
*.war
*.nar
*.ear
*.zip
*.tar.gz
*.rar
*.db
/build
/.vscode
/node_modules/
.env
/testFiles/
/ignore/
*.code-workspace

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CONTRIBUTE.md Normal file
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# Contribute
This file should introduce you with the concepts and tools used in this project.
## PDF Library Docs
- [pdf-lib](https://pdf-lib.js.org) - js
- [pdfcpu](https://pdfcpu.io) - go-wasm
## Adding a PDF Function
In order to add a PDF-Function there are several files that need to be changed. If the function is on the backend only, or on only on the frontend, you just need to add it to one of the locations. If it is available on both, you need to update both locations.
Dependency Injection is used to accomodate for different imports across platforms.
Backend functions can have different implementations than their frontend counterparts if neccesary. Otherwise they can just link to their frontend implementation.
Registering functions will also pass them their dependencies for the specific target platform (Node, Browser)
### Backend
[Register Functions](/functions.js)\
[Functions Folder](/functions/)
Examples that go in the node-functions folder: server-side-only functions, different implementation for backend
### Frontend
[Register Functions](/public/functions.js)\
[Functions Folder](/public/functions/)
Examples that go in the browser-functions folder: client-side-only functions, shared functions

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<p align="center"><img src="https://raw.githubusercontent.com/Frooodle/Stirling-PDF/main/docs/stirling.png" width="80" ><br><h1 align="center">Stirling-PDF</h1>
</p>
# StirlingPDF rewrite
[![Docker Pulls](https://img.shields.io/docker/pulls/frooodle/s-pdf)](https://hub.docker.com/r/frooodle/s-pdf)
[![Discord](https://img.shields.io/discord/1068636748814483718?label=Discord)](https://discord.gg/Cn8pWhQRxZ)
[![Docker Image Version (tag latest semver)](https://img.shields.io/docker/v/frooodle/s-pdf/latest)](https://github.com/Frooodle/Stirling-PDF/)
[![GitHub Repo stars](https://img.shields.io/github/stars/frooodle/stirling-pdf?style=social)](https://github.com/Frooodle/stirling-pdf)
[![Paypal Donate](https://img.shields.io/badge/Paypal%20Donate-yellow?style=flat&logo=paypal)](https://www.paypal.com/paypalme/froodleplex)
[![Github Sponser](https://img.shields.io/badge/Github%20Sponsor-yellow?style=flat&logo=github)](https://github.com/sponsors/Frooodle)
This is the development repository for the new StirlingPDF backend. With the power of JS, WASM & GO this will provide almost all functionality SPDF can do currently directly on the client. For automation purposes this will still provide an API to automate your workflows.
[![Deploy to DO](https://www.deploytodo.com/do-btn-blue.svg)](https://cloud.digitalocean.com/apps/new?repo=https://github.com/Frooodle/Stirling-PDF/tree/digitalOcean&refcode=c3210994b1af)
## Try the new API!
This is a powerful locally hosted web based PDF manipulation tool using docker that allows you to perform various operations on PDF files, such as splitting merging, converting, reorganizing, adding images, rotating, compressing, and more. This locally hosted web application started as a 100% ChatGPT-made application and has evolved to include a wide range of features to handle all your PDF needs.
[![Run in Postman](https://run.pstmn.io/button.svg)](https://documenter.getpostman.com/view/30633786/2s9YRB1Wto)
Stirling PDF makes no outbound calls for any record keeping or tracking.
## Understanding Workflows
All files and PDFs are either purely client side, in server memory only during the execution of the task or within a temporay file only for execution of the task.
Any file which has been downloaded by the user will have already been deleted from the server by that time.
Workflows define how to apply operations to a PDF, including their order and relations with eachother.
Feel free to request any features or bug fixes either in github issues or our [Discord](https://discord.gg/Cn8pWhQRxZ)
Workflows can be created via the web-ui and then exported or, if you want to brag a bit, you can create the JSON object yourself.
![stirling-home](images/stirling-home.png)
### Basics
To create your own, you have to understand a few key features first. You can also look at more examples our github repository.
``` json
{
"outputOptions": {
"zip": false
},
"operations": [
{
"type": "extract",
"values": {
"pagesToExtractArray": [0, 2]
},
"operations": []
}
]
}
```
The workflow above will extract the first (p\[0\]) and third (p\[2\]) page of the document.
You can also nest workflows like this:
``` json
{
"outputOptions": {
"zip": false
},
"operations": [
{
"type": "extract",
"values": {
"pagesToExtractArray": [0, 2]
},
"operations": [
{
"type": "impose",
"values": {
"nup": 2, // 2 pages of the input document will be put on one page of the output document.
"format": "A4L" // A4L -> The page size of the Ouput will be an A4 in Landscape. You can also use other paper formats and "P" for portrait output.
},
"operations": []
}
]
}
]
}
```
If you look at it closely, you will see that the extract operation has another nested operation of the type impose. This workflow will produce a PDF with the 1st and 2nd page of the input on one single page.
### Advanced
If that is not enought for you usecase, there is also the possibility to connect operations with eachother.
You can also do different operations to produce two different output PDFs from one input.
If you are interested in learning about this, take a look at the Example workflows provided in the repository, ask on the discord, or wait for me to finish this documentation.
## Features
- Dark mode support.
- Custom download options (see [here](https://github.com/Frooodle/Stirling-PDF/blob/main/images/settings.png) for example)
- Parallel file processing and downloads
- API for integration with external scripts
- Optional Login and Authentication support (see [here](https://github.com/Frooodle/Stirling-PDF/tree/main#login-authentication) for documentation)
### New
## **PDF Features**
- [x] Client side PDF-Manipulation
- [x] Workflows
- [ ] Stateful UI
- [ ] Node based editing of them
- [ ] Propper auth using passportjs
### **Page Operations**
- Full interactive GUI for merging/splitting/rotating/moving PDFs and their pages.
- Merge multiple PDFs together into a single resultant file.
- Split PDFs into multiple files at specified page numbers or extract all pages as individual files.
- Reorganize PDF pages into different orders.
- Rotate PDFs in 90-degree increments.
- Remove pages.
- Multi-page layout (Format PDFs into a multi-paged page).
- Scale page contents size by set %.
- Adjust Contrast.
- Crop PDF.
- Auto Split PDF (With physically scanned page dividers).
- Extract page(s).
- Convert PDF to a single page.
### Functions
### **Conversion Operations**
- Convert PDFs to and from images.
- Convert any common file to PDF (using LibreOffice).
- Convert PDF to Word/Powerpoint/Others (using LibreOffice).
- Convert HTML to PDF.
- URL to PDF.
- Markdown to PDF.
Current functions of spdf and their progress in this repo.
### **Security & Permissions**
- Add and remove passwords.
- Change/set PDF Permissions.
- Add watermark(s).
- Certify/sign PDFs.
- Sanitize PDFs.
- Auto-redact text.
- [x] Merge
- [x] Split
- [x] Rotate
- [x] Multi-Page-Layout
- [x] Adjust page size/scale
- [ ] Organize
- [ ] Change Metadata
- [ ] Add Watermark
### **Other Operations**
- Add/Generate/Write signatures.
- Repair PDFs.
- Detect and remove blank pages.
- Compare 2 PDFs and show differences in text.
- Add images to PDFs.
- Compress PDFs to decrease their filesize (Using OCRMyPDF).
- Extract images from PDF.
- Extract images from Scans.
- Add page numbers.
- Auto rename file by detecting PDF header text.
- OCR on PDF (Using OCRMyPDF).
- PDF/A conversion (Using OCRMyPDF).
- Edit metadata.
- Flatten PDFs.
- Get all information on a PDF to view or export as JSON.
<br>
- [ ] Remove Pages
- [ ] Remove Blank Pages
- [ ] Detect/Split Scanned photos
For a overview of the tasks and the technology each uses please view [groups.md](https://github.com/Frooodle/Stirling-PDF/blob/main/Groups.md)
Hosted instance/demo of the app can be seen [here](https://pdf.adminforge.de/) hosted by the team at adminforge.de
<br>
## Technologies used
- Spring Boot + Thymeleaf
- PDFBox
- [LibreOffice](https://www.libreoffice.org/discover/libreoffice/) for advanced conversions
- [OcrMyPdf](https://github.com/ocrmypdf/OCRmyPDF)
- HTML, CSS, JavaScript
- Docker
- PDF.js
- PDF-LIB.js
- [ ] Repair
- [ ] Compress
- [ ] Flatten
- [ ] Compare/Diff
## How to use
<br>
### Locally
Please view https://github.com/Frooodle/Stirling-PDF/blob/main/LocalRunGuide.md
- [ ] Sign
- [ ] Sign with Certificate
- [ ] Add Password
- [ ] Remove Password
- [ ] Change Permissions
### Docker
https://hub.docker.com/r/frooodle/s-pdf
<br>
Stirling PDF has 3 different versions, a Full version, Lite, and ultra-Lite. Depending on the types of features you use you may want a smaller image to save on space.
To see what the different versions offer please look at our [version mapping](https://github.com/Frooodle/Stirling-PDF/blob/main/Version-groups.md)
For people that don't mind about space optimization just use the latest tag.
![Docker Image Size (tag)](https://img.shields.io/docker/image-size/frooodle/s-pdf/latest?label=Stirling-PDF%20Full)
![Docker Image Size (tag)](https://img.shields.io/docker/image-size/frooodle/s-pdf/latest-lite?label=Stirling-PDF%20Lite)
![Docker Image Size (tag)](https://img.shields.io/docker/image-size/frooodle/s-pdf/latest-ultra-lite?label=Stirling-PDF%20Ultra-Lite)
- [ ] Image to PDF
- [ ] Add image
- [ ] Extract Images
- [ ] PDF to Image
- [ ] OCR
Docker Run
```
docker run -d \
-p 8080:8080 \
-v /location/of/trainingData:/usr/share/tesseract-ocr/4.00/tessdata \
-v /location/of/extraConfigs:/configs \
-e DOCKER_ENABLE_SECURITY=false \
--name stirling-pdf \
frooodle/s-pdf:latest
Can also add these for customisation but are not required
-v /location/of/customFiles:/customFiles \
```
Docker Compose
```
version: '3.3'
services:
stirling-pdf:
image: frooodle/s-pdf:latest
ports:
- '8080:8080'
volumes:
- /location/of/trainingData:/usr/share/tesseract-ocr/4.00/tessdata #Required for extra OCR languages
- /location/of/extraConfigs:/configs
# - /location/of/customFiles:/customFiles/
environment:
- DOCKER_ENABLE_SECURITY=false
```
<br>
- [ ] Convert file to PDF
- [ ] PDF to Text/RTF
- [ ] PDF to HTML
- [ ] PDF to XML
## Enable OCR/Compression feature
Please view https://github.com/Frooodle/Stirling-PDF/blob/main/HowToUseOCR.md
## Contribute
## Want to add your own language?
Stirling PDF currently supports 18!
- English (English) (en_GB)
- English (US) (en_US)
- Arabic (العربية) (ar_AR)
- German (Deutsch) (de_DE)
- French (Français) (fr_FR)
- Spanish (Español) (es_ES)
- Chinese (简体中文) (zh_CN)
- Catalan (Català) (ca_CA)
- Italian (Italiano) (it_IT)
- Swedish (Svenska) (sv_SE)
- Polish (Polski) (pl_PL)
- Romanian (Română) (ro_RO)
- Korean (한국어) (ko_KR)
- Portuguese Brazilian (Português) (pt_BR)
- Russian (Русский) (ru_RU)
- Basque (Euskara) (eu_ES)
- Japanese (日本語) (ja_JP)
- Dutch (Nederlands) (nl_NL)
If you want to add your own language to Stirling-PDF please refer
https://github.com/Frooodle/Stirling-PDF/blob/main/HowToAddNewLanguage.md
And please create a PR to merge it back in so others can use it!
## How to View
1. Open a web browser and navigate to `http://localhost:8080/`
2. Use the application by following the instructions on the website.
## Customisation
Stirling PDF allows easy customization of the app.
Includes things like
- Custom application name
- Custom slogans, icons, images, and even custom HTML (via file overrides)
There are two options for this, either using the generated settings file ``settings.yml``
This file is located in the ``/configs`` directory and follows standard YAML formatting
Environment variables are also supported and would override the settings file
For example in the settings.yml you have
```
system:
defaultLocale: 'en-US'
```
To have this via an environment variable you would have ``SYSTEM_DEFAULTLOCALE``
The Current list of settings is
```
security:
enableLogin: false # set to 'true' to enable login
csrfDisabled: true
system:
defaultLocale: 'en-US' # Set the default language (e.g. 'de-DE', 'fr-FR', etc)
googlevisibility: false # 'true' to allow Google visibility (via robots.txt), 'false' to disallow
customStaticFilePath: '/customFiles/static/' # Directory path for custom static files
#ui:
# appName: exampleAppName # Application's visible name
# homeDescription: I am a description # Short description or tagline shown on homepage.
# appNameNavbar: navbarName # Name displayed on the navigation bar
endpoints:
toRemove: [] # List endpoints to disable (e.g. ['img-to-pdf', 'remove-pages'])
groupsToRemove: [] # List groups to disable (e.g. ['LibreOffice'])
metrics:
enabled: true # 'true' to enable Info APIs endpoints (view http://localhost:8080/swagger-ui/index.html#/API to learn more), 'false' to disable
```
### Extra notes
- Endpoints. Currently, the endpoints ENDPOINTS_TO_REMOVE and GROUPS_TO_REMOVE can include comma separate lists of endpoints and groups to disable as example ENDPOINTS_TO_REMOVE=img-to-pdf,remove-pages would disable both image-to-pdf and remove pages, GROUPS_TO_REMOVE=LibreOffice Would disable all things that use LibreOffice. You can see a list of all endpoints and groups [here](https://github.com/Frooodle/Stirling-PDF/blob/main/groups.md)
- customStaticFilePath. Customise static files such as the app logo by placing files in the /customFiles/static/ directory. An example of customising app logo is placing a /customFiles/static/favicon.svg to override current SVG. This can be used to change any images/icons/css/fonts/js etc in Stirling-PDF
### Environment only parameters
- ``SYSTEM_ROOTURIPATH`` ie set to ``/pdf-app`` to Set the application's root URI to ``localhost:8080/pdf-app``
- ``SYSTEM_CONNECTIONTIMEOUTMINUTES`` to set custom connection timeout values
- ``DOCKER_ENABLE_SECURITY`` to tell docker to download security jar (required as true for auth login)
## API
For those wanting to use Stirling-PDFs backend API to link with their own custom scripting to edit PDFs you can view all existing API documentation
[here](https://app.swaggerhub.com/apis-docs/Frooodle/Stirling-PDF/) or navigate to /swagger-ui/index.html of your stirling-pdf instance for your versions documentation (Or by following the API button in your settings of Stirling-PDF)
## Login authentication
![stirling-login](images/login-light.png)
### Prerequisites:
- User must have the folder ./configs volumed within docker so that it is retained during updates.
- Docker uses must download the security jar version by setting ``DOCKER_ENABLE_SECURITY`` to ``true`` in environment variables.
- Then either enable login via the settings.yml file or via setting ``SECURITY_ENABLE_LOGIN`` to ``true``
- Now the initial user will be generated with username ``admin`` and password ``stirling``. On login you will be forced to change the password to a new one. You can also use the environment variables ``SECURITY_INITIALLOGIN_USERNAME`` and ``SECURITY_INITIALLOGIN_PASSWORD`` to set your own straight away (Recommended to remove them after user creation).
Once the above has been done, on restart, a new stirling-pdf-DB.mv.db will show if everything worked.
When you login to Stirling PDF you will be redirected to /login page to login with those default credentials. After login everything should function as normal
To access your account settings go to Account settings in the settings cog menu (top right in navbar) This Account settings menu is also where you find your API key.
To add new users go to the bottom of Account settings and hit 'Admin Settings', here you can add new users. The different roles mentioned within this are for rate limiting. This is a Work in progress which will be expanding on more in future
For API usage you must provide a header with 'X-API-Key' and the associated API key for that user.
## FAQ
### Q1: What are your planned features?
- Progress bar/Tracking
- Full custom logic pipelines to combine multiple operations together.
- Folder support with auto scanning to perform operations on
- Redact text (Via UI not just automated way)
- Add Forms
- Annotations
- Multi page layout (Stich PDF pages together) support x rows y columns and custom page sizing
- Fill forms mannual and automatic
### Q2: Why is my application downloading .htm files?
This is a issue caused commonly by your NGINX congifuration. The default file upload size for NGINX is 1MB, you need to add the following in your Nginx sites-available file. ``client_max_body_size SIZE;`` Where "SIZE" is 50M for example for 50MB files.
### Q3: Why is my download timing out
NGINX has timeout values by default so if you are running Stirling-PDF behind NGINX you may need to set a timeout value such as adding the config ``proxy_read_timeout 3600;``
For initial instructions look at [CONTRIBUTE.md](./CONTRIBUTE.md)

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import PDFLib from 'pdf-lib';
import * as pdfcpuWraopper from "./public/wasm/pdfcpu-wrapper-node.js";
import { extractPages as dependantExtractPages } from "./public/functions/extractPages.js";
import { impose as dependantImpose } from './public/functions/impose.js';
import { mergePDFs as dependantMergePDFs } from './public/functions/mergePDFs.js';
import { rotatePages as dependantRotatePages } from './public/functions/rotatePages.js';
import { scaleContent as dependantScaleContent} from './public/functions/scaleContent.js';
import { scalePage as dependantScalePage } from './public/functions/scalePage.js';
import { splitPDF as dependantSplitPDF } from './public/functions/splitPDF.js';
export async function extractPages(snapshot, pagesToExtractArray) {
return dependantExtractPages(snapshot, pagesToExtractArray, PDFLib);
}
export async function impose(snapshot, nup, format) {
return dependantImpose(snapshot, nup, format, pdfcpuWraopper);
}
export async function mergePDFs(snapshots) {
return dependantMergePDFs(snapshots, PDFLib);
}
export async function rotatePages(snapshot, rotation) {
return dependantRotatePages(snapshot, rotation, PDFLib);
}
export async function scaleContent(snapshot, scaleFactor) {
return dependantScaleContent(snapshot, scaleFactor, PDFLib);
}
export async function scalePage(snapshot, pageSize) {
return dependantScalePage(snapshot, pageSize, PDFLib);
}
export async function splitPDF(snapshot, splitAfterPageArray) {
return dependantSplitPDF(snapshot, splitAfterPageArray, PDFLib);
}

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import api from './routes/api/index.js';
import express from 'express';
const app = express();
const PORT = 8080;
// Static Middleware
app.use(express.static('./public'));
app.get('/', function (req, res, next) { // TODO: Use EJS?
res.render('home.ejs');
});
app.use("/api/", api);
app.listen(PORT, function (err) {
if (err) console.log(err);
console.log(`http://localhost:${PORT}`);
});

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package-lock.json generated Normal file
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{
"name": "pdfjs",
"version": "1.0.0",
"lockfileVersion": 1,
"requires": true,
"dependencies": {
"@pdf-lib/standard-fonts": {
"version": "1.0.0",
"resolved": "https://registry.npmjs.org/@pdf-lib/standard-fonts/-/standard-fonts-1.0.0.tgz",
"integrity": "sha512-hU30BK9IUN/su0Mn9VdlVKsWBS6GyhVfqjwl1FjZN4TxP6cCw0jP2w7V3Hf5uX7M0AZJ16vey9yE0ny7Sa59ZA==",
"requires": {
"pako": "^1.0.6"
}
},
"@pdf-lib/upng": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/@pdf-lib/upng/-/upng-1.0.1.tgz",
"integrity": "sha512-dQK2FUMQtowVP00mtIksrlZhdFXQZPC+taih1q4CvPZ5vqdxR/LKBaFg0oAfzd1GlHZXXSPdQfzQnt+ViGvEIQ==",
"requires": {
"pako": "^1.0.10"
}
},
"@wasmer/wasmfs": {
"version": "0.12.0",
"resolved": "https://registry.npmjs.org/@wasmer/wasmfs/-/wasmfs-0.12.0.tgz",
"integrity": "sha512-m1ftchyQ1DfSenm5XbbdGIpb6KJHH5z0gODo3IZr6lATkj4WXfX/UeBTZ0aG9YVShBp+kHLdUHvOkqjy6p/GWw==",
"requires": {
"memfs": "3.0.4",
"pako": "^1.0.11",
"tar-stream": "^2.1.0"
}
},
"accepts": {
"version": "1.3.8",
"resolved": "https://registry.npmjs.org/accepts/-/accepts-1.3.8.tgz",
"integrity": "sha512-PYAthTa2m2VKxuvSD3DPC/Gy+U+sOA1LAuT8mkmRuvw+NACSaeXEQ+NHcVF7rONl6qcaxV3Uuemwawk+7+SJLw==",
"requires": {
"mime-types": "~2.1.34",
"negotiator": "0.6.3"
}
},
"archiver": {
"version": "6.0.1",
"resolved": "https://registry.npmjs.org/archiver/-/archiver-6.0.1.tgz",
"integrity": "sha512-CXGy4poOLBKptiZH//VlWdFuUC1RESbdZjGjILwBuZ73P7WkAUN0htfSfBq/7k6FRFlpu7bg4JOkj1vU9G6jcQ==",
"requires": {
"archiver-utils": "^4.0.1",
"async": "^3.2.4",
"buffer-crc32": "^0.2.1",
"readable-stream": "^3.6.0",
"readdir-glob": "^1.1.2",
"tar-stream": "^3.0.0",
"zip-stream": "^5.0.1"
},
"dependencies": {
"tar-stream": {
"version": "3.1.6",
"resolved": "https://registry.npmjs.org/tar-stream/-/tar-stream-3.1.6.tgz",
"integrity": "sha512-B/UyjYwPpMBv+PaFSWAmtYjwdrlEaZQEhMIBFNC5oEG8lpiW8XjcSdmEaClj28ArfKScKHs2nshz3k2le6crsg==",
"requires": {
"b4a": "^1.6.4",
"fast-fifo": "^1.2.0",
"streamx": "^2.15.0"
}
}
}
},
"archiver-utils": {
"version": "4.0.1",
"resolved": "https://registry.npmjs.org/archiver-utils/-/archiver-utils-4.0.1.tgz",
"integrity": "sha512-Q4Q99idbvzmgCTEAAhi32BkOyq8iVI5EwdO0PmBDSGIzzjYNdcFn7Q7k3OzbLy4kLUPXfJtG6fO2RjftXbobBg==",
"requires": {
"glob": "^8.0.0",
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19
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@ -0,0 +1,19 @@
{
"name": "pdfjs",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "node ."
},
"author": "",
"license": "ISC",
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},
"type": "module"
}

139
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@ -0,0 +1,139 @@
// JSON Representation of this Node Tree:
// https://discord.com/channels/1068636748814483718/1099390571493195898/1118192754103693483
// https://cdn.discordapp.com/attachments/1099390571493195898/1118192753759764520/image.png?ex=6537dba7&is=652566a7&hm=dc46820ef7c34bc37424794966c5f66f93ba0e15a740742c364d47d31ea119a9&
export const discordWorkflow = {
outputOptions: {
zip: false
},
operations: [
{
type: "extract",
values: { "index": "1" },
operations: [
{
type: "removeObjects",
values: { "objectNames": "photo, josh" },
operations: [
{
type: "wait",
values: { "id": 1 }
}
]
}
]
},
{
type: "extract",
values: { "index": "2-5" },
operations: [
{
type: "fillField",
values: { "objectName": "name", "inputValue": "Josh" },
operations: [
{
type: "wait",
values: { "id": 1 }
}
]
}
]
},
{
type: "done", // This gets called when the other merge-ops with the same id finish.
values: { "id": 1 },
operations: [
{
type: "merge",
values: {},
operations: []
}
]
},
{
type: "extractImages",
values: {},
operations: []
},
{
type: "merge",
values: {},
operations: [
{
type: "transform",
values: { "scale": "2x", "rotation": "90deg" },
operations: []
}
]
}
]
}
// This will merge all input files into one giant document
export const mergeOnly = {
outputOptions: {
zip: false
},
operations: [
{
type: "merge",
values: {},
operations: []
}
]
}
// Extract Pages and store them in a new document
export const extractOnly = {
outputOptions: {
zip: false
},
operations: [
{
type: "extract",
values: { "pagesToExtractArray": [0, 2] },
operations: []
}
]
}
// Split a document up into multiple documents
export const splitOnly = {
outputOptions: {
zip: false
},
operations: [
{
type: "split",
values: { "pagesToSplitAfterArray": [2, 10] },
operations: []
}
]
}
// Split a document up into multiple documents
export const rotateOnly = {
outputOptions: {
zip: false
},
operations: [
{
type: "rotate",
values: { "rotation": -90 },
operations: []
}
]
}
// Split a document up into multiple documents
export const imposeOnly = {
outputOptions: {
zip: false
},
operations: [
{
type: "impose",
values: { "nup": 2, "format": "A4L" },
operations: []
}
]
}

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// PDFLib gets importet via index.html script-tag
import * as pdfcpuWraopper from "./wasm/pdfcpu-wrapper-browser.js";
import { extractPages as dependantExtractPages } from "./functions/extractPages.js";
import { impose as dependantImpose } from './functions/impose.js';
import { mergePDFs as dependantMergePDFs } from './functions/mergePDFs.js';
import { rotatePages as dependantRotatePages } from './functions/rotatePages.js';
import { scaleContent as dependantScaleContent} from './functions/scaleContent.js';
import { scalePage as dependantScalePage } from './functions/scalePage.js';
import { splitPDF as dependantSplitPDF } from './functions/splitPDF.js';
export async function extractPages(snapshot, pagesToExtractArray) {
return dependantExtractPages(snapshot, pagesToExtractArray, PDFLib);
}
export async function impose(snapshot, nup, format) {
return dependantImpose(snapshot, nup, format, pdfcpuWraopper);
}
export async function mergePDFs(snapshots) {
return dependantMergePDFs(snapshots, PDFLib);
}
export async function rotatePages(snapshot, rotation) {
return dependantRotatePages(snapshot, rotation, PDFLib);
}
export async function scaleContent(snapshot, scaleFactor) {
return dependantScaleContent(snapshot, scaleFactor, PDFLib);
}
export async function scalePage(snapshot, pageSize) {
return dependantScalePage(snapshot, pageSize, PDFLib);
}
export async function splitPDF(snapshot, splitAfterPageArray) {
return dependantSplitPDF(snapshot, splitAfterPageArray, PDFLib);
}

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export async function extractPages(snapshot, pagesToExtractArray, PDFLib) {
const pdfDoc = await PDFLib.PDFDocument.load(snapshot)
// TODO: invent a better format for pagesToExtractArray and convert it.
return createSubDocument(pdfDoc, pagesToExtractArray, PDFLib);
};
export async function createSubDocument(pdfDoc, pagesToExtractArray, PDFLib) {
const subDocument = await PDFLib.PDFDocument.create();
// Check that array max number is not larger pdf pages number
if(Math.max(...pagesToExtractArray) >= pdfDoc.getPageCount()) {
throw new Error(`The PDF document only has ${pdfDoc.getPageCount()} pages and you tried to extract page ${Math.max(...pagesToExtractArray)}`);
}
const copiedPages = await subDocument.copyPages(pdfDoc, pagesToExtractArray);
for (let i = 0; i < copiedPages.length; i++) {
subDocument.addPage(copiedPages[i]);
}
return subDocument.save();
}

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export async function impose(snapshot, nup, format, pdfcpuWraopper) {
return await pdfcpuWraopper.oneToOne([
"pdfcpu.wasm",
"nup",
"-c",
"disable",
'f:' + format,
"/output.pdf",
String(nup),
"input.pdf",
], snapshot);
}

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export const mergePDFs = async (snapshots, PDFLib) => {
const mergedPdf = await PDFLib.PDFDocument.create();
for (let i = 0; i < snapshots.length; i++) {
const pdfToMerge = await PDFLib.PDFDocument.load(snapshots[i]);
const copiedPages = await mergedPdf.copyPages(pdfToMerge, pdfToMerge.getPageIndices());
copiedPages.forEach((page) => mergedPdf.addPage(page));
}
return mergedPdf.save();
};

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export async function rotatePages (snapshot, rotation, PDFLib) {
// Load the original PDF file
const pdfDoc = await PDFLib.PDFDocument.load(snapshot, {
parseSpeed: PDFLib.ParseSpeeds.Fastest,
});
const pages = pdfDoc.getPages();
pages.forEach(page => {
// Change page size
page.setRotation(PDFLib.degrees(rotation))
});
// Serialize the modified document
return pdfDoc.save();
};

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export async function scaleContent(snapshot, scaleFactor, PDFLib) {
// Load the original PDF file
const pdfDoc = await PDFLib.PDFDocument.load(snapshot, {
parseSpeed: PDFLib.ParseSpeeds.Fastest,
});
const pages = pdfDoc.getPages();
pages.forEach(page => {
const width = page.getWidth();
const height = page.getHeight();
// Scale content
page.scaleContent(scaleFactor, scaleFactor);
const scaled_diff = {
width: Math.round(width - scaleFactor * width),
height: Math.round(height - scaleFactor * height),
};
// Center content in new page format
page.translateContent(Math.round(scaled_diff.width / 2), Math.round(scaled_diff.height / 2));
});
// Serialize the modified document
return pdfDoc.save();
};

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export async function scalePage(snapshot, pageSize, PDFLib) {
// Load the original PDF file
const pdfDoc = await PDFLib.PDFDocument.load(snapshot, {
parseSpeed: PDFLib.ParseSpeeds.Fastest,
});
const new_size = pageSize;
const pages = pdfDoc.getPages();
pages.forEach(page => {
// Change page size
page.setSize(new_size.width, new_size.height);
});
// Serialize the modified document
return pdfDoc.save();
};
export const PageSize = {
a4: {
width: 594.96,
height: 841.92
},
letter: {
width: 612,
height: 792
}
};

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import { createSubDocument } from "./extractPages.js";
export async function splitPDF(snapshot, splitAfterPageArray, PDFLib) {
const pdfDoc = await PDFLib.PDFDocument.load(snapshot)
const numberOfPages = pdfDoc.getPages().length;
let pagesArray = [];
let splitAfter = splitAfterPageArray.shift();
const subDocuments = [];
for (let i = 0; i < numberOfPages; i++) {
if(i > splitAfter && pagesArray.length > 0) {
subDocuments.push(await createSubDocument(pdfDoc, pagesArray, PDFLib));
splitAfter = splitAfterPageArray.shift();
pagesArray = [];
}
pagesArray.push(i);
}
subDocuments.push(await createSubDocument(pdfDoc, pagesArray, PDFLib));
pagesArray = [];
return subDocuments;
};

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<!--TODO: Remove External Dependencies-->
<script src="https://unpkg.com/pdf-lib@1.17.1/dist/pdf-lib.min.js"></script>
<script src="https://unpkg.com/downloadjs@1.4.7"></script>
<script src="/wasm/browserfs.min.js"></script>
<script src="index.js" type="module"></script>
</head>
<body>
<input type="file" id="pdfFile" accept=".pdf" multiple>
<ul id="operations">
</ul>
<select id="pdfOptions">
<option value="scaleContent">Scale Content</option>
<option value="changePageSize">Change Page Size</option>
<option value="mergePDFs">Merge PDFs</option>
<option value="splitPDFs">Split PDFs</option>
</select>
<button id="addButton">Add</button>
<button id="doneButton">Done</button>
</body>
</html>

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import { scaleContent } from "./functions/scaleContent.js";
import { scalePage, PageSize } from "./functions/scalePage.js";
import * as exampleWorkflows from "./exampleWorkflows.js";
import { traverseOperations } from "./traverseOperations.js";
import * as Functions from "./functions.js";
(async (workflow) => {
const pdfFileInput = document.getElementById('pdfFile');
const doneButton = document.getElementById("doneButton");
doneButton.addEventListener('click', async (e) => {
console.log("Starting...");
const files = Array.from(pdfFileInput.files);
console.log(files);
const inputs = await Promise.all(files.map(async file => {
return {
originalFileName: file.name.replace(/\.[^/.]+$/, ""),
fileName: file.name.replace(/\.[^/.]+$/, ""),
buffer: new Uint8Array(await file.arrayBuffer())
}
}));
console.log(inputs);
const traverse = traverseOperations(workflow.operations, inputs, Functions);
let pdfResults;
let iteration;
while (true) {
iteration = await traverse.next();
if (iteration.done) {
pdfResults = iteration.value;
console.log(`data: processing done\n\n`);
break;
}
console.log(`data: ${iteration.value}\n\n`);
}
pdfResults.forEach(result => {
download(result.buffer, result.fileName, "application/pdf");
});
});
})(exampleWorkflows.imposeOnly);

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export function organizeWaitOperations(operations) {
// Initialize an object to store the counts and associated "done" operations
const waitCounts = {};
const doneOperations = {};
// Function to count "type: wait" operations and associate "done" operations per id
function countWaitOperationsAndDone(operations) {
for (const operation of operations) {
if (operation.type === "wait") {
const id = operation.values.id;
if (id in waitCounts) {
waitCounts[id]++;
} else {
waitCounts[id] = 1;
}
}
if (operation.type === "done") {
const id = operation.values.id;
doneOperations[id] = operation;
}
if (operation.operations) {
countWaitOperationsAndDone(operation.operations);
}
}
}
// Start counting and associating from the root operations
countWaitOperationsAndDone(operations);
// Combine counts and associated "done" operations
const result = {};
for (const id in waitCounts) {
result[id] = {
waitCount: waitCounts[id],
doneOperation: doneOperations[id],
input: []
};
}
return result;
}

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import { organizeWaitOperations } from "./organizeWaitOperations.js";
export async function * traverseOperations(operations, input, Functions) {
const waitOperations = organizeWaitOperations(operations);
let results = [];
yield* nextOperation(operations, input);
console.log("Done2");
return results;
async function * nextOperation(operations, input) {
if(Array.isArray(operations) && operations.length == 0) { // isEmpty
if(Array.isArray(input)) {
console.log("operation done: " + input[0].fileName + input.length > 1 ? "+" : "");
results = results.concat(input);
return;
}
else {
console.log("operation done: " + input.fileName);
results.push(input);
return;
}
}
for (let i = 0; i < operations.length; i++) {
yield* computeOperation(operations[i], structuredClone(input));
}
}
async function * computeOperation(operation, input) {
yield "Starting: " + operation.type;
switch (operation.type) {
case "done": // Skip this, because it is a valid node.
break;
case "wait":
const waitOperation = waitOperations[operation.values.id];
if(Array.isArray(input)) {
waitOperation.input.concat(input); // TODO: May have unexpected concequences. Needs further testing!
}
else {
waitOperation.input.push(input);
}
waitOperation.waitCount--;
if(waitOperation.waitCount == 0) {
yield* nextOperation(waitOperation.doneOperation.operations, waitOperation.input);
}
break;
case "extract":
yield* nToN(input, operation, async (input) => {
input.fileName += "_extractedPages";
input.buffer = await Functions.extractPages(input.buffer, operation.values["pagesToExtractArray"]);
});
break;
case "impose":
yield* nToN(input, operation, async (input) => {
input.fileName += "_imposed";
input.buffer = await Functions.impose(input.buffer, operation.values["nup"], operation.values["format"]);
});
break;
case "merge":
yield* nToOne(input, operation, async (inputs) => {
return {
originalFileName: inputs.map(input => input.originalFileName).join("_and_"),
fileName: inputs.map(input => input.fileName).join("_and_") + "_merged",
buffer: await Functions.mergePDFs(inputs.map(input => input.buffer))
}
});
break;
case "rotate":
yield* nToN(input, operation, async (input) => {
input.fileName += "_turned";
input.buffer = await Functions.rotatePages(input.buffer, operation.values["rotation"]);
});
break;
case "split":
// TODO: A split might break the done condition, it may count multiple times. Needs further testing!
yield* oneToN(input, operation, async (input) => {
const splitResult = await Functions.splitPDF(input.buffer, operation.values["pagesToSplitAfterArray"]);
const splits = [];
for (let j = 0; j < splitResult.length; j++) {
splits.push({
originalFileName: input.originalFileName,
fileName: input.fileName + "_split" + j,
buffer: splitResult[j]
})
}
input = splits;
});
break;
default:
throw new Error(`${operation.type} not implemented yet.`);
break;
}
}
async function * nToOne(inputs, operation, callback) {
if(!Array.isArray(inputs)) {
inputs = [inputs];
}
inputs = await callback(inputs);
yield* nextOperation(operation.operations, inputs);
}
async function * oneToN(input, operation, callback) {
if(Array.isArray(input)) {
for (let i = 0; i < input.length; i++) {
await callback(input[i]);
}
yield* nextOperation(operation.operations, input);
}
else {
await callback(input);
yield* nextOperation(operation.operations, input);
}
}
async function * nToN(input, operation, callback) {
if(Array.isArray(input)) {
for (let i = 0; i < input.length; i++) {
await callback(input[i]);
}
yield* nextOperation(operation.operations, input);
}
else {
await callback(input);
yield* nextOperation(operation.operations, input);
}
}
}

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// TODO: Uses the BrowserFS import, needs to be changed for serverside
let wasmLocation = "/wasm/";
let fs;
let Buffer;
configureFs();
loadWasm();
function configureFs() {
BrowserFS.configure(
{
fs: "InMemory",
},
function (e) {
if (e) {
// An error happened!
throw e;
}
fs = BrowserFS.BFSRequire("fs");
Buffer = BrowserFS.BFSRequire("buffer").Buffer;
window.fs = fs;
window.Buffer = Buffer;
}
);
}
function loadWasm() {
const script = document.createElement("script");
script.src = wasmLocation + "/wasm_exec.js";
script.async = true;
document.body.appendChild(script);
}
const runWasm = async (param) => {
if (window.cachedWasmResponse === undefined) {
const response = await fetch(wasmLocation + "/pdfcpu.wasm");
const buffer = await response.arrayBuffer();
window.cachedWasmResponse = buffer;
window.go = new Go();
}
const { instance } = await WebAssembly.instantiate(
window.cachedWasmResponse,
window.go.importObject
);
window.go.argv = param;
await window.go.run(instance);
return window.go.exitCode;
};
async function loadFileAsync(data) {
console.log(`Writing file to MemoryFS`);
await fs.writeFile(`/input.pdf`, data);
console.log(`Write done. Validating...`);
let exitcode = await runWasm([
"pdfcpu.wasm",
"validate",
"-c",
"disable",
`/input.pdf`,
]);
if (exitcode !== 0)
throw new Error("There was an error validating your PDFs");
console.log(`File is Valid`);
}
export async function impose(snapshot, nup, format) {
};
export async function oneToOne(wasmArray, snapshot) {
await loadFileAsync(Buffer.from(snapshot));
console.log("Nuping File");
let exitcode = await runWasm(wasmArray);
if (exitcode !== 0) {
console.error("There was an error nuping your PDFs");
return;
}
await fs.unlink("input.pdf");
const contents = fs.readFileSync("output.pdf");
fs.unlink("output.pdf");
console.log("Your File ist Ready!");
return new Uint8Array(contents);
}
export async function manyToOne() {
//TODO: Do this of neccesary for some operations
}
export async function oneToMany() {
//TODO: Do this of neccesary for some operations
}
export async function manyToMany() {
//TODO: Do this of neccesary for some operations
}

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// TODO: Uses the BrowserFS import, needs to be changed for serverside
import { WasmFs } from '@wasmer/wasmfs';
import path from "path";
let webWasmLocation = "/wasm/";
let nodeWasmLocation = "./public/wasm/";
let fs;
const wasmfs = new WasmFs();
(async () => {
await loadWasm();
await configureFs();
})();
async function configureFs() {
// Can't use BrowserFS: https://github.com/jvilk/BrowserFS/issues/271
fs = wasmfs.fs;
global.fs = fs;
console.log("InMemoryFs configured");
}
async function loadWasm() {
global.crypto = (await import("crypto")).webcrypto; // wasm dependecy
await import("./wasm_exec.js");
}
const runWasm = async (param) => {
if (global.cachedWasmResponse === undefined) {
const buffer = (await import("fs")).readFileSync(nodeWasmLocation + "/pdfcpu.wasm");
global.cachedWasmResponse = buffer;
global.go = new Go();
}
const { instance } = await WebAssembly.instantiate(
global.cachedWasmResponse,
global.go.importObject
);
global.go.argv = param;
await global.go.run(instance);
return global.go.exitCode;
};
async function loadFileAsync(data) {
console.log(`Writing file to Disk`);
fs.writeFileSync(`input.pdf`, data);
console.log(`Write done. Validating...`);
let exitcode = await runWasm([
"pdfcpu.wasm",
"validate",
"-c",
"disable",
`input.pdf`,
]);
if (exitcode !== 0)
throw new Error("There was an error validating your PDFs");
// // Get logs of command
// wasmfs.getStdOut().then(response => {
// console.log(response);
// });
console.log(`File is Valid`);
}
export async function oneToOne(wasmArray, snapshot) {
await loadFileAsync(Buffer.from(snapshot));
console.log("Nuping File");
let exitcode = await runWasm(wasmArray);
if (exitcode !== 0) {
console.error("There was an error nuping your PDFs");
return;
}
console.log("Nuping Done");
await checkExistsWithTimeout("/output.pdf", 1000);
console.log("Write started...");
// TODO: Make this more elegant, this waits for the write to finish.
// Maybe replace wasmfs with https://github.com/streamich/memfs
let fileSize;
while (true) {
fileSize = fs.statSync("/output.pdf").size;
await new Promise((resolve, reject) => {
setTimeout(() => {
resolve();
}, 50);
});
if(fileSize > 0 && fileSize == fs.statSync("/output.pdf").size) // Wait for file Size not changing anymore.
break;
}
console.log("Could be done?");
fs.unlinkSync("input.pdf");
const data = fs.readFileSync("/output.pdf");
if(data.length == 0) {
throw Error("File Size 0 that should not happen. The write probably didn't finish in time.");
}
fs.unlinkSync("output.pdf");
console.log("Your File ist Ready!");
return new Uint8Array(data);
}
export async function manyToOne() {
//TODO: Do this if necessary for some pdfcpu operations
}
export async function oneToMany() {
//TODO: Do this if necessary for some pdfcpu operations
}
export async function manyToMany() {
//TODO: Do this if necessary for some pdfcpu operations
}
// THX: https://stackoverflow.com/questions/26165725/nodejs-check-file-exists-if-not-wait-till-it-exist
function checkExistsWithTimeout(filePath, timeout) {
return new Promise(function (resolve, reject) {
var timer = setTimeout(function () {
watcher.close();
reject(new Error('File did not exists and was not created during the timeout.'));
}, timeout);
fs.access(filePath, fs.constants.R_OK, function (err) {
if (!err) {
clearTimeout(timer);
watcher.close();
resolve();
}
});
var dir = path.dirname(filePath);
var watcher = fs.watch(dir, function (eventType, filename) {
clearTimeout(timer);
watcher.close();
resolve();
});
});
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
(() => {
// Map multiple JavaScript environments to a single common API,
// preferring web standards over Node.js API.
//
// Environments considered:
// - Browsers
// - Node.js
// - Electron
// - Parcel
// - Webpack
console.log("imported")
if (typeof global !== "undefined") {
// global already exists
} else if (typeof window !== "undefined") {
window.global = window;
} else if (typeof self !== "undefined") {
self.global = self;
} else {
throw new Error("cannot export Go (neither global, window nor self is defined)");
}
let logFS = false
var handler = {
get: function (target, property) {
if (property in target && target[property] instanceof Function) {
return function () {
if (logFS) {
console.log(property, 'called', arguments);
}
// 将callback替换
if (arguments[arguments.length - 1] instanceof Function) {
var origCB = arguments[arguments.length - 1];
var newCB = function () {
if (logFS) {
console.log('callback for', property, 'get called with args:', arguments);
}
return Reflect.apply(origCB, arguments.callee, arguments);
}
arguments[arguments.length - 1] = newCB;
}
return Reflect.apply(target[property], target, arguments);
}
} else {
return target[property]
}
}
}
if (!global.require && typeof require !== "undefined") {
global.require = require;
}
if (!global.fs && global.require) {
//const fs = require("fs");
if (typeof fs === "object" && fs !== null && Object.keys(fs).length !== 0) {
global.fs = fs;
}
}
const enosys = () => {
const err = new Error("not implemented");
err.code = "ENOSYS";
return err;
};
if (!global.fs) {
let outputBuf = "";
global.fs = {
constants: {
O_WRONLY: -1,
O_RDWR: -1,
O_CREAT: -1,
O_TRUNC: -1,
O_APPEND: -1,
O_EXCL: -1
}, // unused
writeSync(fd, buf) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
console.log(outputBuf.substr(0, nl));
outputBuf = outputBuf.substr(nl + 1);
}
return buf.length;
},
write(fd, buf, offset, length, position, callback) {
if (offset !== 0 || length !== buf.length || position !== null) {
callback(enosys());
return;
}
const n = this.writeSync(fd, buf);
callback(null, n);
},
chmod(path, mode, callback) {
callback(enosys());
},
chown(path, uid, gid, callback) {
callback(enosys());
},
close(fd, callback) {
callback(enosys());
},
fchmod(fd, mode, callback) {
callback(enosys());
},
fchown(fd, uid, gid, callback) {
callback(enosys());
},
fstat(fd, callback) {
callback(enosys());
},
fsync(fd, callback) {
callback(null);
},
ftruncate(fd, length, callback) {
callback(enosys());
},
lchown(path, uid, gid, callback) {
callback(enosys());
},
link(path, link, callback) {
callback(enosys());
},
lstat(path, callback) {
callback(enosys());
},
mkdir(path, perm, callback) {
callback(enosys());
},
open(path, flags, mode, callback) {
callback(enosys());
},
read(fd, buffer, offset, length, position, callback) {
callback(enosys());
},
readdir(path, callback) {
callback(enosys());
},
readlink(path, callback) {
callback(enosys());
},
rename(from, to, callback) {
callback(enosys());
},
rmdir(path, callback) {
callback(enosys());
},
stat(path, callback) {
callback(enosys());
},
symlink(path, link, callback) {
callback(enosys());
},
truncate(path, length, callback) {
callback(enosys());
},
unlink(path, callback) {
callback(enosys());
},
utimes(path, atime, mtime, callback) {
callback(enosys());
},
};
}
if (!global.process) {
global.process = {
getuid() {
return -1;
},
getgid() {
return -1;
},
geteuid() {
return -1;
},
getegid() {
return -1;
},
getgroups() {
throw enosys();
},
pid: -1,
ppid: -1,
umask() {
throw enosys();
},
cwd() {
throw enosys();
},
chdir() {
throw enosys();
},
}
}
if (!global.crypto && global.require) {
const nodeCrypto = require("crypto");
global.crypto = {
getRandomValues(b) {
nodeCrypto.randomFillSync(b);
},
};
}
if (!global.crypto) {
throw new Error("global.crypto is not available, polyfill required (getRandomValues only)");
}
if (!global.performance) {
global.performance = {
now() {
const [sec, nsec] = process.hrtime();
return sec * 1000 + nsec / 1000000;
},
};
}
if (!global.TextEncoder && global.require) {
global.TextEncoder = require("util").TextEncoder;
}
if (!global.TextEncoder) {
throw new Error("global.TextEncoder is not available, polyfill required");
}
if (!global.TextDecoder && global.require) {
global.TextDecoder = require("util").TextDecoder;
}
if (!global.TextDecoder) {
throw new Error("global.TextDecoder is not available, polyfill required");
}
const isNodeJS = global.process && global.process.title === "node";
if (!isNodeJS) {
// console.log("ini browser fs")
// var myfs = global.BrowserFS.BFSRequire('fs');
// global.Buffer = global.BrowserFS.BFSRequire('buffer').Buffer;
// global.fs = myfs;
global.fs.constants = {
O_RDONLY: 0,
O_WRONLY: 1,
O_RDWR: 2,
O_CREAT: 64,
O_CREATE: 64,
O_EXCL: 128,
O_NOCTTY: 256,
O_TRUNC: 512,
O_APPEND: 1024,
O_DIRECTORY: 65536,
O_NOATIME: 262144,
O_NOFOLLOW: 131072,
O_SYNC: 1052672,
O_DIRECT: 16384,
O_NONBLOCK: 2048,
};
let outputBuf = "";
global.fs.writeSyncOriginal = global.fs.writeSync
global.fs.writeSync = function (fd, buf) {
if (fd === 1 || fd === 2) {
outputBuf += decoder.decode(buf);
const nl = outputBuf.lastIndexOf("\n");
if (nl != -1) {
console.log(outputBuf.substr(0, nl));
outputBuf = outputBuf.substr(nl + 1);
}
return buf.length;
} else {
return global.fs.writeSyncOriginal(...arguments);
}
};
global.fs.writeOriginal = global.fs.write
global.fs.write = function (fd, buf, offset, length, position, callback) {
// (corresponding to STDOUT/STDERR)
if (fd === 1 || fd === 2) {
if (offset !== 0 || length !== buf.length || position !== null) {
throw new Error("not implemented");
}
const n = this.writeSync(fd, buf);
callback(null, n, buf);
} else {
// buf: read buf first
arguments[1] = global.Buffer.from(arguments[1]);
return global.fs.writeOriginal(...arguments);
}
};
global.fs.openOriginal = global.fs.open
global.fs.open = function (path, flags, mode, callback) {
var myflags = 'r';
var O = global.fs.constants;
// Convert numeric flags to string flags
// FIXME: maybe wrong...
console.log("open dir?", path, 'flag', flags, myflags)
if (flags & O.O_WRONLY) { // 'w'
myflags = 'w';
if (flags & O.O_EXCL) {
myflags = 'wx';
}
} else if (flags & O.O_RDWR) { // 'r+' or 'w+'
if (flags & O.O_CREAT && flags & O.O_TRUNC) { // w+
if (flags & O.O_EXCL) {
myflags = 'wx+';
} else {
myflags = 'w+';
}
} else { // r+
myflags = 'r+';
}
} else if (flags & O.O_APPEND) { // 'a'
console.log("append error")
throw new Error("Not implmented");
} else {
// 打开文件
myflags = 'r+';
console.log("open dir?", path, 'flag', flags, myflags)
}
return global.fs.openOriginal(path, myflags, mode, callback);
};
global.fs.fstatOriginal = global.fs.fstat;
global.fs.fstat = function (fd, callback) {
return global.fs.fstatOriginal(fd, function () {
var retStat = arguments[1];
delete retStat['fileData'];
retStat.atimeMs = retStat.atime.getTime();
retStat.mtimeMs = retStat.mtime.getTime();
retStat.ctimeMs = retStat.ctime.getTime();
retStat.birthtimeMs = retStat.birthtime.getTime();
return callback(arguments[0], retStat);
});
};
global.fs.closeOriginal = global.fs.close;
global.fs.close = function (fd, callback) {
return global.fs.closeOriginal(fd, function () {
if (typeof arguments[0] === 'undefined') arguments[0] = null;
return callback(...arguments);
});
}
// global.fs.renameOriginal = global.fs.rename
// global.fs.rename = function (from, to, callback) {
// console.log("rename a0", arguments[0])
// global.fs.renameOriginal(from, to);
// callback(arguments[0])
// }
// global.fs.renameSyncOriginal = global.fs.renameSync
// global.fs.renameSync = function(fd, options) {
// console.log("Sync")
// }
global.fs = new Proxy(global.fs, handler);
}
// End of polyfills for common API.
const encoder = new TextEncoder("utf-8");
const decoder = new TextDecoder("utf-8");
global.Go = class {
constructor() {
this.argv = ["js"];
this.env = {};
this.exit = (code) => {
this.exitCode = code;
if (code !== 0) {
console.warn("exit code:", code);
}
};
this._exitPromise = new Promise((resolve) => {
this._resolveExitPromise = resolve;
});
this._pendingEvent = null;
this._scheduledTimeouts = new Map();
this._nextCallbackTimeoutID = 1;
const setInt64 = (addr, v) => {
this.mem.setUint32(addr + 0, v, true);
this.mem.setUint32(addr + 4, Math.floor(v / 4294967296), true);
}
const getInt64 = (addr) => {
const low = this.mem.getUint32(addr + 0, true);
const high = this.mem.getInt32(addr + 4, true);
return low + high * 4294967296;
}
const loadValue = (addr) => {
const f = this.mem.getFloat64(addr, true);
if (f === 0) {
return undefined;
}
if (!isNaN(f)) {
return f;
}
const id = this.mem.getUint32(addr, true);
return this._values[id];
}
const storeValue = (addr, v) => {
const nanHead = 0x7FF80000;
if (typeof v === "number" && v !== 0) {
if (isNaN(v)) {
this.mem.setUint32(addr + 4, nanHead, true);
this.mem.setUint32(addr, 0, true);
return;
}
this.mem.setFloat64(addr, v, true);
return;
}
if (v === undefined) {
this.mem.setFloat64(addr, 0, true);
return;
}
let id = this._ids.get(v);
if (id === undefined) {
id = this._idPool.pop();
if (id === undefined) {
id = this._values.length;
}
this._values[id] = v;
this._goRefCounts[id] = 0;
this._ids.set(v, id);
}
this._goRefCounts[id]++;
let typeFlag = 0;
switch (typeof v) {
case "object":
if (v !== null) {
typeFlag = 1;
}
break;
case "string":
typeFlag = 2;
break;
case "symbol":
typeFlag = 3;
break;
case "function":
typeFlag = 4;
break;
}
this.mem.setUint32(addr + 4, nanHead | typeFlag, true);
this.mem.setUint32(addr, id, true);
}
const loadSlice = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
return new Uint8Array(this._inst.exports.mem.buffer, array, len);
}
const loadSliceOfValues = (addr) => {
const array = getInt64(addr + 0);
const len = getInt64(addr + 8);
const a = new Array(len);
for (let i = 0; i < len; i++) {
a[i] = loadValue(array + i * 8);
}
return a;
}
const loadString = (addr) => {
const saddr = getInt64(addr + 0);
const len = getInt64(addr + 8);
return decoder.decode(new DataView(this._inst.exports.mem.buffer, saddr, len));
}
const timeOrigin = Date.now() - performance.now();
this.importObject = {
go: {
// Go's SP does not change as long as no Go code is running. Some operations (e.g. calls, getters and setters)
// may synchronously trigger a Go event handler. This makes Go code get executed in the middle of the imported
// function. A goroutine can switch to a new stack if the current stack is too small (see morestack function).
// This changes the SP, thus we have to update the SP used by the imported function.
// func wasmExit(code int32)
"runtime.wasmExit": (sp) => {
sp >>>= 0;
const code = this.mem.getInt32(sp + 8, true);
this.exited = true;
delete this._inst;
delete this._values;
delete this._goRefCounts;
delete this._ids;
delete this._idPool;
this.exit(code);
},
// func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
"runtime.wasmWrite": (sp) => {
sp >>>= 0;
const fd = getInt64(sp + 8);
const p = getInt64(sp + 16);
const n = this.mem.getInt32(sp + 24, true);
fs.writeSync(fd, new Uint8Array(this._inst.exports.mem.buffer, p, n));
},
// func resetMemoryDataView()
"runtime.resetMemoryDataView": (sp) => {
sp >>>= 0;
this.mem = new DataView(this._inst.exports.mem.buffer);
},
// func nanotime1() int64
"runtime.nanotime1": (sp) => {
sp >>>= 0;
setInt64(sp + 8, (timeOrigin + performance.now()) * 1000000);
},
// func walltime1() (sec int64, nsec int32)
"runtime.walltime1": (sp) => {
sp >>>= 0;
const msec = (new Date).getTime();
setInt64(sp + 8, msec / 1000);
this.mem.setInt32(sp + 16, (msec % 1000) * 1000000, true);
},
// func scheduleTimeoutEvent(delay int64) int32
"runtime.scheduleTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this._nextCallbackTimeoutID;
this._nextCallbackTimeoutID++;
this._scheduledTimeouts.set(id, setTimeout(
() => {
this._resume();
while (this._scheduledTimeouts.has(id)) {
// for some reason Go failed to register the timeout event, log and try again
// (temporary workaround for https://github.com/golang/go/issues/28975)
console.warn("scheduleTimeoutEvent: missed timeout event");
this._resume();
}
},
getInt64(sp + 8) + 1, // setTimeout has been seen to fire up to 1 millisecond early
));
this.mem.setInt32(sp + 16, id, true);
},
// func clearTimeoutEvent(id int32)
"runtime.clearTimeoutEvent": (sp) => {
sp >>>= 0;
const id = this.mem.getInt32(sp + 8, true);
clearTimeout(this._scheduledTimeouts.get(id));
this._scheduledTimeouts.delete(id);
},
// func getRandomData(r []byte)
"runtime.getRandomData": (sp) => {
sp >>>= 0;
crypto.getRandomValues(loadSlice(sp + 8));
},
// func finalizeRef(v ref)
"syscall/js.finalizeRef": (sp) => {
sp >>>= 0;
const id = this.mem.getUint32(sp + 8, true);
this._goRefCounts[id]--;
if (this._goRefCounts[id] === 0) {
const v = this._values[id];
this._values[id] = null;
this._ids.delete(v);
this._idPool.push(id);
}
},
// func stringVal(value string) ref
"syscall/js.stringVal": (sp) => {
sp >>>= 0;
storeValue(sp + 24, loadString(sp + 8));
},
// func valueGet(v ref, p string) ref
"syscall/js.valueGet": (sp) => {
sp >>>= 0;
const result = Reflect.get(loadValue(sp + 8), loadString(sp + 16));
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 32, result);
},
// func valueSet(v ref, p string, x ref)
"syscall/js.valueSet": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), loadString(sp + 16), loadValue(sp + 32));
},
// func valueDelete(v ref, p string)
"syscall/js.valueDelete": (sp) => {
sp >>>= 0;
Reflect.deleteProperty(loadValue(sp + 8), loadString(sp + 16));
},
// func valueIndex(v ref, i int) ref
"syscall/js.valueIndex": (sp) => {
sp >>>= 0;
storeValue(sp + 24, Reflect.get(loadValue(sp + 8), getInt64(sp + 16)));
},
// valueSetIndex(v ref, i int, x ref)
"syscall/js.valueSetIndex": (sp) => {
sp >>>= 0;
Reflect.set(loadValue(sp + 8), getInt64(sp + 16), loadValue(sp + 24));
},
// func valueCall(v ref, m string, args []ref) (ref, bool)
"syscall/js.valueCall": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const m = Reflect.get(v, loadString(sp + 16));
const args = loadSliceOfValues(sp + 32);
const result = Reflect.apply(m, v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 56, result);
this.mem.setUint8(sp + 64, 1);
} catch (err) {
storeValue(sp + 56, err);
this.mem.setUint8(sp + 64, 0);
}
},
// func valueInvoke(v ref, args []ref) (ref, bool)
"syscall/js.valueInvoke": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.apply(v, undefined, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
}
},
// func valueNew(v ref, args []ref) (ref, bool)
"syscall/js.valueNew": (sp) => {
sp >>>= 0;
try {
const v = loadValue(sp + 8);
const args = loadSliceOfValues(sp + 16);
const result = Reflect.construct(v, args);
sp = this._inst.exports.getsp() >>> 0; // see comment above
storeValue(sp + 40, result);
this.mem.setUint8(sp + 48, 1);
} catch (err) {
storeValue(sp + 40, err);
this.mem.setUint8(sp + 48, 0);
}
},
// func valueLength(v ref) int
"syscall/js.valueLength": (sp) => {
sp >>>= 0;
setInt64(sp + 16, parseInt(loadValue(sp + 8).length));
},
// valuePrepareString(v ref) (ref, int)
"syscall/js.valuePrepareString": (sp) => {
sp >>>= 0;
const str = encoder.encode(String(loadValue(sp + 8)));
storeValue(sp + 16, str);
setInt64(sp + 24, str.length);
},
// valueLoadString(v ref, b []byte)
"syscall/js.valueLoadString": (sp) => {
sp >>>= 0;
const str = loadValue(sp + 8);
loadSlice(sp + 16).set(str);
},
// func valueInstanceOf(v ref, t ref) bool
"syscall/js.valueInstanceOf": (sp) => {
sp >>>= 0;
this.mem.setUint8(sp + 24, (loadValue(sp + 8) instanceof loadValue(sp + 16)) ? 1 : 0);
},
// func copyBytesToGo(dst []byte, src ref) (int, bool)
"syscall/js.copyBytesToGo": (sp) => {
sp >>>= 0;
const dst = loadSlice(sp + 8);
const src = loadValue(sp + 32);
if (!(src instanceof Uint8Array || src instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
},
// func copyBytesToJS(dst ref, src []byte) (int, bool)
"syscall/js.copyBytesToJS": (sp) => {
sp >>>= 0;
const dst = loadValue(sp + 8);
const src = loadSlice(sp + 16);
if (!(dst instanceof Uint8Array || dst instanceof Uint8ClampedArray)) {
this.mem.setUint8(sp + 48, 0);
return;
}
const toCopy = src.subarray(0, dst.length);
dst.set(toCopy);
setInt64(sp + 40, toCopy.length);
this.mem.setUint8(sp + 48, 1);
},
"debug": (value) => {
console.log(value);
},
}
};
}
async run(instance) {
if (!(instance instanceof WebAssembly.Instance)) {
throw new Error("Go.run: WebAssembly.Instance expected");
}
this._inst = instance;
this.mem = new DataView(this._inst.exports.mem.buffer);
this._values = [ // JS values that Go currently has references to, indexed by reference id
NaN,
0,
null,
true,
false,
global,
this,
];
this._goRefCounts = new Array(this._values.length).fill(Infinity); // number of references that Go has to a JS value, indexed by reference id
this._ids = new Map([ // mapping from JS values to reference ids
[0, 1],
[null, 2],
[true, 3],
[false, 4],
[global, 5],
[this, 6],
]);
this._idPool = []; // unused ids that have been garbage collected
this.exited = false; // whether the Go program has exited
// Pass command line arguments and environment variables to WebAssembly by writing them to the linear memory.
let offset = 4096;
const strPtr = (str) => {
const ptr = offset;
const bytes = encoder.encode(str + "\0");
new Uint8Array(this.mem.buffer, offset, bytes.length).set(bytes);
offset += bytes.length;
if (offset % 8 !== 0) {
offset += 8 - (offset % 8);
}
return ptr;
};
const argc = this.argv.length;
const argvPtrs = [];
this.argv.forEach((arg) => {
argvPtrs.push(strPtr(arg));
});
argvPtrs.push(0);
const keys = Object.keys(this.env).sort();
keys.forEach((key) => {
argvPtrs.push(strPtr(`${key}=${this.env[key]}`));
});
argvPtrs.push(0);
const argv = offset;
argvPtrs.forEach((ptr) => {
this.mem.setUint32(offset, ptr, true);
this.mem.setUint32(offset + 4, 0, true);
offset += 8;
});
this._inst.exports.run(argc, argv);
if (this.exited) {
this._resolveExitPromise();
}
await this._exitPromise;
}
_resume() {
if (this.exited) {
throw new Error("Go program has already exited");
}
this._inst.exports.resume();
if (this.exited) {
this._resolveExitPromise();
}
}
_makeFuncWrapper(id) {
const go = this;
return function () {
const event = {
id: id,
this: this,
args: arguments
};
go._pendingEvent = event;
go._resume();
return event.result;
};
}
}
if (
typeof module !== "undefined" &&
global.require &&
global.require.main === module &&
global.process &&
global.process.versions &&
!global.process.versions.electron
) {
if (process.argv.length < 3) {
console.error("usage: go_js_wasm_exec [wasm binary] [arguments]");
process.exit(1);
}
const go = new Go();
go.argv = process.argv.slice(2);
go.env = Object.assign({
TMPDIR: require("os").tmpdir()
}, process.env);
go.exit = process.exit;
WebAssembly.instantiate(fs.readFileSync(process.argv[2]), go.importObject).then((result) => {
process.on("exit", (code) => { // Node.js exits if no event handler is pending
if (code === 0 && !go.exited) {
// deadlock, make Go print error and stack traces
go._pendingEvent = {
id: 0
};
go._resume();
}
});
return go.run(result.instance);
}).catch((err) => {
console.error(err);
process.exit(1);
});
}
})();

15
routes/api/index.js Normal file
View File

@ -0,0 +1,15 @@
import express from 'express';
import workflow from './workflow.js';
import fileUpload from 'express-fileupload';
const router = express.Router();
router.use(fileUpload());
router.get("/", function (req, res, next) {
// TODO: Implement root api endpoint
res.status(501).json({"Error": "Unfinished Endpoint. This sould probably send some api docs?"});
});
router.use("/workflow", workflow);
export default router;

233
routes/api/workflow.js Normal file
View File

@ -0,0 +1,233 @@
import express from 'express';
import crypto from 'crypto';
import stream from "stream";
import Archiver from 'archiver';
import * as Functions from "../../functions.js";
import { traverseOperations } from "../../public/traverseOperations.js";
const activeWorkflows = {};
const router = express.Router();
router.post("/:workflowUuid?", [
async (req, res) => {
if(req.files == null) {
res.status(400).json({"error": "No files were uploaded."});
return;
}
if(Array.isArray(req.files.files)) {
req.files = req.files.files;
}
else {
req.files = [req.files.files];
}
const workflow = JSON.parse(req.body.workflow);
// TODO: Validate input further (json may fail or not be a valid workflow)
const inputs = await Promise.all(req.files.map(async file => {
return {
originalFileName: file.name.replace(/\.[^/.]+$/, ""),
fileName: file.name.replace(/\.[^/.]+$/, ""),
buffer: new Uint8Array(await file.data)
}
}));
// Allow option to do it synchronously and just make a long request
if(req.body.async === "false") {
console.log("Don't do async");
const traverse = traverseOperations(workflow.operations, inputs, Functions);
let pdfResults;
let iteration;
while (true) {
iteration = await traverse.next();
if (iteration.done) {
pdfResults = iteration.value;
console.log("Done");
break;
}
console.log(iteration.value);
}
console.log("Download");
downloadHandler(res, pdfResults);
}
else {
console.log("Start Aync Workflow");
// TODO: UUID collision checks
let workflowID = req.params.workflowUuid
if(!workflowID)
workflowID = generateWorkflowID();
activeWorkflows[workflowID] = {
createdAt: Date.now(),
finished: false,
eventStream: null,
result: null,
// TODO: When auth is implemented: owner
}
const activeWorkflow = activeWorkflows[workflowID];
res.status(200).json({
"workflowID": workflowID,
"data-recieved": {
"fileCount": req.files.length,
"workflow": workflow
}
});
const traverse = traverseOperations(workflow.operations, inputs);
let pdfResults;
let iteration;
while (true) {
iteration = await traverse.next();
if (iteration.done) {
pdfResults = iteration.value;
if(activeWorkflow.eventStream) {
activeWorkflow.eventStream.write(`data: processing done\n\n`);
activeWorkflow.eventStream.end();
}
break;
}
if(activeWorkflow.eventStream)
activeWorkflow.eventStream.write(`data: ${iteration.value}\n\n`);
}
activeWorkflow.result = pdfResults;
activeWorkflow.finished = true;
}
}
]);
router.get("/progress/:workflowUuid", (req, res, nex) => {
if(!req.params.workflowUuid) {
res.status(400).json({"error": "No workflowUuid weres provided."});
return;
}
if(!activeWorkflows.hasOwnProperty(req.params.workflowUuid)) {
res.status(400).json({"error": `No workflow with workflowUuid "${req.params.workflowUuid}" was found.`});
return;
}
// Return current progress
const workflow = activeWorkflows[req.params.workflowUuid];
res.status(200).json({ createdAt: workflow.createdAt, finished: workflow.finished });
});
router.get("/progress-stream/:workflowUuid", (req, res, nex) => {
if(!req.params.workflowUuid) {
res.status(400).json({"error": "No workflowUuid weres provided."});
return;
}
if(!activeWorkflows.hasOwnProperty(req.params.workflowUuid)) {
res.status(400).json({"error": `No workflow with workflowUuid "${req.params.workflowUuid}" was found.`});
return;
}
// TODO: Check if already done
// Send realtime updates
res.setHeader('Cache-Control', 'no-cache');
res.setHeader('Content-Type', 'text/event-stream');
res.setHeader('Access-Control-Allow-Origin', '*');
res.setHeader('Connection', 'keep-alive');
res.flushHeaders(); // flush the headers to establish SSE with client
const workflow = activeWorkflows[req.params.workflowUuid];
workflow.eventStream = res;
res.on('close', () => {
res.end();
// TODO: Abort if not already done?
});
});
router.get("/result/:workflowUuid", (req, res, nex) => {
if(!req.params.workflowUuid) {
res.status(400).json({"error": "No workflowUuid weres provided."});
return;
}
if(!activeWorkflows.hasOwnProperty(req.params.workflowUuid)) {
res.status(400).json({"error": `No workflow with workflowUuid "${req.params.workflowUuid}" was found.`});
return;
}
/*
* If workflow isn't done return error
* Send file, TODO: if there are multiple outputs return as zip
* If download is done, delete results / allow deletion within the next 5-60 mins
*/
const workflow = activeWorkflows[req.params.workflowUuid];
if(!workflow.finished) {
res.status(202).json({ message: "Workflow hasn't finished yet. Check progress or connect to progress-steam to get notified when its done." });
return
}
downloadHandler(res, workflow.result);
// Delete workflow / results when done.
delete activeWorkflows[req.params.workflowUuid];
});
router.post("/abort/:workflowUuid", (req, res, nex) => {
if(!req.params.workflowUuid) {
res.status(400).json({"error": "No workflowUuid weres provided."});
return;
}
if(!activeWorkflows.hasOwnProperty(req.params.workflowUuid)) {
res.status(400).json({"error": `No workflow with workflowUuid "${req.params.workflowUuid}" was found.`});
return;
}
// TODO: Abort workflow
res.status(501).json({"warning": "Abortion has not been implemented yet."});
});
function generateWorkflowID() {
return crypto.randomUUID();
}
function downloadHandler(res, pdfResults) {
if(pdfResults.length == 0) {
res.status(500).json({"warning": "The workflow had no outputs."});
}
else if(pdfResults.length > 1) {
// TODO: Also allow the user to download multiple files without zip compressen, because this is kind of slow...
res.writeHead(200, {
'Content-Type': 'application/zip',
'Content-disposition': 'attachment; filename=workflow-results.zip'
});
var zip = Archiver('zip');
// Stream the file to the user.
zip.pipe(res);
console.log("Adding Files to ZIP...");
for (let i = 0; i < pdfResults.length; i++) {
// TODO: Implement other file types (mostly fro image & text extraction)
// TODO: Check for name collisions
zip.append(Buffer.from(pdfResults[i].buffer), { name: pdfResults[i].fileName + ".pdf" });
}
zip.finalize();
console.log("Sent");
}
else {
const readStream = new stream.PassThrough();
readStream.end(pdfResults[0].buffer);
// TODO: Implement other file types (mostly fro image & text extraction)
res.set("Content-disposition", 'attachment; filename=' + pdfResults[0].fileName + ".pdf");
res.set("Content-Type", "application/pdf");
readStream.pipe(res);
}
}
export default router;