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kato.cafe
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PDF -> PNG Convertor 

* DockerFile Addditions
+ Helper Functions
This commit is contained in:
Daniel Legt 2022-05-10 02:32:55 +03:00
parent 31292b0d17
commit 7306bf607a
9 changed files with 608 additions and 27 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
Dockerfile
View File

@ -1,5 +1,7 @@
FROM node:18-buster
ENV DEBIAN_FRONTEND=noninteractive
# Create app directory
WORKDIR /app
@ -9,5 +11,11 @@ COPY . .
# Install Requirements and build the app
RUN npm install && npm run build;
# Install required dependencies
RUN apt update && apt install -y \
poppler-utils poppler-data \
&& rm -rf /var/lib/apt/lists/*
EXPOSE 5386
CMD [ "npm", "run", "start" ]

451
package-lock.json generated
View File

@ -6,10 +6,14 @@
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"@types/express-handlebars": "^6.0.0",
"@types/mmmagic": "^0.4.30",
"@types/multer": "^1.4.7",
"dotenv": "^16.0.0",
"express": "^4.18.1",
"express-handlebars": "^6.0.5",
"mmmagic": "^0.5.3",
"multer": "^1.4.4",
"node-poppler": "^5.1.4",
"ts-node": "^10.7.0",
"typescript": "^4.6.4"
},
@ -84,15 +88,6 @@
"@types/serve-static": "*"
}
},
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"deprecated": "This is a stub types definition. express-handlebars provides its own type definitions, so you do not need this installed.",
"dependencies": {
"express-handlebars": "*"
}
},
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@ -108,6 +103,22 @@
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@ -188,6 +199,11 @@
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@ -260,8 +276,19 @@
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@ -283,6 +310,17 @@
"url": "https://github.com/sponsors/ljharb"
}
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@ -316,6 +354,52 @@
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"string_decoder": "~1.1.1",
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@ -348,6 +432,11 @@
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@ -378,6 +467,18 @@
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@ -784,6 +885,11 @@
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@ -869,11 +975,57 @@
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@ -962,6 +1134,11 @@
"url": "https://github.com/sponsors/jonschlinkert"
}
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@ -1678,6 +1923,51 @@
"integrity": "sha1-2Klr13/Wjfd5OnMDajug1UBdR3s=",
"dev": true
},
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"resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.2.tgz",
"integrity": "sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==",
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"buffer-from": "^1.0.0",
"inherits": "^2.0.3",
"readable-stream": "^2.2.2",
"typedarray": "^0.0.6"
},
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"resolved": "https://registry.npmjs.org/isarray/-/isarray-1.0.0.tgz",
"integrity": "sha1-u5NdSFgsuhaMBoNJV6VKPgcSTxE="
},
"readable-stream": {
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"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.7.tgz",
"integrity": "sha512-Ebho8K4jIbHAxnuxi7o42OrZgF/ZTNcsZj6nRKyUmkhLFq8CHItp/fy6hQZuZmP/n3yZ9VBUbp4zz/mX8hmYPw==",
"requires": {
"core-util-is": "~1.0.0",
"inherits": "~2.0.3",
"isarray": "~1.0.0",
"process-nextick-args": "~2.0.0",
"safe-buffer": "~5.1.1",
"string_decoder": "~1.1.1",
"util-deprecate": "~1.0.1"
}
},
"safe-buffer": {
"version": "5.1.2",
"resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
"integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
},
"string_decoder": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.1.1.tgz",
"integrity": "sha512-n/ShnvDi6FHbbVfviro+WojiFzv+s8MPMHBczVePfUpDJLwoLT0ht1l4YwBCbi8pJAveEEdnkHyPyTP/mzRfwg==",
"requires": {
"safe-buffer": "~5.1.0"
}
}
}
},
"content-disposition": {
"version": "0.5.4",
"resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
@ -1701,6 +1991,11 @@
"resolved": "https://registry.npmjs.org/cookie-signature/-/cookie-signature-1.0.6.tgz",
"integrity": "sha1-4wOogrNCzD7oylE6eZmXNNqzriw="
},
"core-util-is": {
"version": "1.0.3",
"resolved": "https://registry.npmjs.org/core-util-is/-/core-util-is-1.0.3.tgz",
"integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ=="
},
"create-require": {
"version": "1.1.1",
"resolved": "https://registry.npmjs.org/create-require/-/create-require-1.1.1.tgz",
@ -1724,6 +2019,15 @@
"resolved": "https://registry.npmjs.org/destroy/-/destroy-1.2.0.tgz",
"integrity": "sha512-2sJGJTaXIIaR1w4iJSNoN0hnMY7Gpc/n8D4qSCJw8QqFWXf7cuAgnEHxBpweaVcPevC2l3KpjYCx3NypQQgaJg=="
},
"dicer": {
"version": "0.2.5",
"resolved": "https://registry.npmjs.org/dicer/-/dicer-0.2.5.tgz",
"integrity": "sha1-WZbAhrszIYyBLAkL3cCc0S+stw8=",
"requires": {
"readable-stream": "1.1.x",
"streamsearch": "0.1.2"
}
},
"diff": {
"version": "4.0.2",
"resolved": "https://registry.npmjs.org/diff/-/diff-4.0.2.tgz",
@ -2033,6 +2337,11 @@
"integrity": "sha512-41Cifkg6e8TylSpdtTpeLVMqvSBEVzTttHvERD741+pnZ8ANv0004MRL43QKPDlK9cGvNp6NZWZUBlbGXYxxng==",
"dev": true
},
"isarray": {
"version": "0.0.1",
"resolved": "https://registry.npmjs.org/isarray/-/isarray-0.0.1.tgz",
"integrity": "sha1-ihis/Kmo9Bd+Cav8YDiTmwXR7t8="
},
"make-error": {
"version": "1.3.6",
"resolved": "https://registry.npmjs.org/make-error/-/make-error-1.3.6.tgz",
@ -2091,11 +2400,49 @@
"integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
"dev": true
},
"mmmagic": {
"version": "0.5.3",
"resolved": "https://registry.npmjs.org/mmmagic/-/mmmagic-0.5.3.tgz",
"integrity": "sha512-xLqCu7GJYTzJczg0jafXFuh+iPzQL/ru0YYf4GiTTz8Cehru/wiXtUS8Pp8Xi77zNaiVndJ0OO1yAFci6iHyFg==",
"requires": {
"nan": "^2.13.2"
}
},
"ms": {
"version": "2.0.0",
"resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
"integrity": "sha1-VgiurfwAvmwpAd9fmGF4jeDVl8g="
},
"multer": {
"version": "1.4.4",
"resolved": "https://registry.npmjs.org/multer/-/multer-1.4.4.tgz",
"integrity": "sha512-2wY2+xD4udX612aMqMcB8Ws2Voq6NIUPEtD1be6m411T4uDH/VtL9i//xvcyFlTVfRdaBsk7hV5tgrGQqhuBiw==",
"requires": {
"append-field": "^1.0.0",
"busboy": "^0.2.11",
"concat-stream": "^1.5.2",
"mkdirp": "^0.5.4",
"object-assign": "^4.1.1",
"on-finished": "^2.3.0",
"type-is": "^1.6.4",
"xtend": "^4.0.0"
},
"dependencies": {
"mkdirp": {
"version": "0.5.6",
"resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-0.5.6.tgz",
"integrity": "sha512-FP+p8RB8OWpF3YZBCrP5gtADmtXApB5AMLn+vdyA+PyxCjrCs00mjyUozssO33cwDeT3wNGdLxJ5M//YqtHAJw==",
"requires": {
"minimist": "^1.2.6"
}
}
}
},
"nan": {
"version": "2.15.0",
"resolved": "https://registry.npmjs.org/nan/-/nan-2.15.0.tgz",
"integrity": "sha512-8ZtvEnA2c5aYCZYd1cvgdnU6cqwixRoYg70xPLWUws5ORTa/lnw+u4amixRS/Ac5U5mQVgp9pnlSUnbNWFaWZQ=="
},
"negotiator": {
"version": "0.6.3",
"resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
@ -2106,12 +2453,26 @@
"resolved": "https://registry.npmjs.org/neo-async/-/neo-async-2.6.2.tgz",
"integrity": "sha512-Yd3UES5mWCSqR+qNT93S3UoYUkqAZ9lLg8a7g9rimsWmYGK8cVToA4/sF3RrshdyV3sAGMXVUmpMYOw+dLpOuw=="
},
"node-poppler": {
"version": "5.1.4",
"resolved": "https://registry.npmjs.org/node-poppler/-/node-poppler-5.1.4.tgz",
"integrity": "sha512-HF2PyHtKpOzx8YKFHAwj+BHHcrfEpzRrBmPjMnpb5UZeL3hBDeyF72t52DZfj3wibusUbTLvf6+s7H4dYFz8fg==",
"requires": {
"camelcase": "^6.3.0",
"upath": "^2.0.1"
}
},
"normalize-path": {
"version": "3.0.0",
"resolved": "https://registry.npmjs.org/normalize-path/-/normalize-path-3.0.0.tgz",
"integrity": "sha512-6eZs5Ls3WtCisHWp9S2GUy8dqkpGi4BVSz3GaqiE6ezub0512ESztXUwUB6C6IKbQkY2Pnb/mD4WYojCRwcwLA==",
"dev": true
},
"object-assign": {
"version": "4.1.1",
"resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
"integrity": "sha1-IQmtx5ZYh8/AXLvUQsrIv7s2CGM="
},
"object-inspect": {
"version": "1.12.0",
"resolved": "https://registry.npmjs.org/object-inspect/-/object-inspect-1.12.0.tgz",
@ -2160,6 +2521,11 @@
"integrity": "sha512-JU3teHTNjmE2VCGFzuY8EXzCDVwEqB2a8fsIvwaStHhAWJEeVd1o1QD80CU6+ZdEXXSLbSsuLwJjkCBWqRQUVA==",
"dev": true
},
"process-nextick-args": {
"version": "2.0.1",
"resolved": "https://registry.npmjs.org/process-nextick-args/-/process-nextick-args-2.0.1.tgz",
"integrity": "sha512-3ouUOpQhtgrbOa17J7+uxOTpITYWaGP7/AhoR3+A+/1e9skrzelGi/dXzEYyvbxubEF6Wn2ypscTKiKJFFn1ag=="
},
"proxy-addr": {
"version": "2.0.7",
"resolved": "https://registry.npmjs.org/proxy-addr/-/proxy-addr-2.0.7.tgz",
@ -2193,6 +2559,17 @@
"unpipe": "1.0.0"
}
},
"readable-stream": {
"version": "1.1.14",
"resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-1.1.14.tgz",
"integrity": "sha1-fPTFTvZI44EwhMY23SB54WbAgdk=",
"requires": {
"core-util-is": "~1.0.0",
"inherits": "~2.0.1",
"isarray": "0.0.1",
"string_decoder": "~0.10.x"
}
},
"readdirp": {
"version": "3.6.0",
"resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
@ -2305,6 +2682,16 @@
"resolved": "https://registry.npmjs.org/statuses/-/statuses-2.0.1.tgz",
"integrity": "sha512-RwNA9Z/7PrK06rYLIzFMlaF+l73iwpzsqRIFgbMLbTcLD6cOao82TaWefPXQvB2fOC4AjuYSEndS7N/mTCbkdQ=="
},
"streamsearch": {
"version": "0.1.2",
"resolved": "https://registry.npmjs.org/streamsearch/-/streamsearch-0.1.2.tgz",
"integrity": "sha1-gIudDlb8Jz2Am6VzOOkpkZoanxo="
},
"string_decoder": {
"version": "0.10.31",
"resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-0.10.31.tgz",
"integrity": "sha1-YuIDvEF2bGwoyfyEMB2rHFMQ+pQ="
},
"strip-bom": {
"version": "3.0.0",
"resolved": "https://registry.npmjs.org/strip-bom/-/strip-bom-3.0.0.tgz",
@ -2418,6 +2805,11 @@
"mime-types": "~2.1.24"
}
},
"typedarray": {
"version": "0.0.6",
"resolved": "https://registry.npmjs.org/typedarray/-/typedarray-0.0.6.tgz",
"integrity": "sha1-hnrHTjhkGHsdPUfZlqeOxciDB3c="
},
"typescript": {
"version": "4.6.4",
"resolved": "https://registry.npmjs.org/typescript/-/typescript-4.6.4.tgz",
@ -2434,6 +2826,16 @@
"resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
"integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
},
"upath": {
"version": "2.0.1",
"resolved": "https://registry.npmjs.org/upath/-/upath-2.0.1.tgz",
"integrity": "sha512-1uEe95xksV1O0CYKXo8vQvN1JEbtJp7lb7C5U9HMsIp6IVwntkH/oNUzyVNQSd4S1sYk2FpSSW44FqMc8qee5w=="
},
"util-deprecate": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",
"integrity": "sha1-RQ1Nyfpw3nMnYvvS1KKJgUGaDM8="
},
"utils-merge": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
@ -2462,8 +2864,7 @@
"xtend": {
"version": "4.0.2",
"resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
"integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==",
"dev": true
"integrity": "sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ=="
},
"yn": {
"version": "3.1.1",

7
package.json
View File

@ -1,7 +1,7 @@
{
"scripts": {
"start": "node ./dist/app.js",
"test": "cd src && ts-node-dev --respawn app.ts",
"test": "ts-node-dev --respawn src/app.ts",
"build": "tsc"
},
"devDependencies": {
@ -9,9 +9,14 @@
},
"dependencies": {
"@types/express": "^4.17.13",
"@types/mmmagic": "^0.4.30",
"@types/multer": "^1.4.7",
"dotenv": "^16.0.0",
"express": "^4.18.1",
"express-handlebars": "^6.0.5",
"mmmagic": "^0.5.3",
"multer": "^1.4.4",
"node-poppler": "^5.1.4",
"ts-node": "^10.7.0",
"typescript": "^4.6.4"
}

86
src/Controllers/Convert.ts Normal file
View File

@ -0,0 +1,86 @@
import { Request, Response, NextFunction, Router } from 'express';
import { Magic, MAGIC_MIME_TYPE } from 'mmmagic';
import { findFile, returnError } from '../Helpers/ApiHelper';
import { convertFileToPNG } from '../Models/ConversionModel';
const magic = new Magic(MAGIC_MIME_TYPE);
const convertController = async (req: Request, res: Response, next: NextFunction) => {
// Check if any files were sent over.
if ( !req.files || req.files?.length <= 0 ) {
return returnError(res, {
"message": "No files have been provided, this api endpoint requres files to be able to process them",
"error": "Empty files array"
})
}
// Get our file
const inputFile = findFile('inputFile', req.files as Express.Multer.File[]);
// Check if we have an input File
if ( inputFile == null ) {
return returnError(res, {
"message": "Broken file name in request, please try again.",
"error": "Files are in the call, but we require the name inputFile to be sent over."
})
}
let inputFileType: string | null = null;
// Get the input file format
await new Promise<string | string[]>((_r, _e) => {
magic.detectFile(inputFile.path, (err, fileType) => {
if ( err ) {
return _e(err);
} else {
return _r(fileType);
}
})
})
.then( ftype => {
console.log(ftype);
if ( typeof ftype != 'object' ) {
inputFileType = ftype;
} else {
inputFileType = ftype[0];
}
})
.catch( err => {
console.error(err);
})
if ( !!!inputFileType ) {
return returnError(res, {
message: "Could not determine a valid input file type",
error: "Could not determine a valid input file type",
})
}
// Check if we have the target Format
const targetFormat = req.body.targetFormat
// Predefine the result
let result: string | null = null;
// Check for the input/output formats
if ( targetFormat == 'png' && inputFileType == 'application/pdf' ) {
await convertFileToPNG(inputFile)
.then( data => {
result = data.toString(`base64`);
})
.catch( err => {
console.error(err);
})
}
res.status(200).send({
message: `Conversion completed`,
result: result,
});
}
export { convertController }

19
src/Helpers/ApiHelper.ts Normal file
View File

@ -0,0 +1,19 @@
import { Response } from "express";
export function returnError(res: Response, content: any, status: number = 400) {
res.status(status).send(content);
}
export function findFile(fieldName: string, fileList: Express.Multer.File[]): Express.Multer.File | null {
// Go through all files
for ( let file of fileList ) {
// Check if the field name matches
if ( file.fieldname == fieldName) {
// Return the found file
return file;
}
}
return null;
}

36
src/Models/ConversionModel.ts Normal file
View File

@ -0,0 +1,36 @@
import { Poppler } from "node-poppler";
import fs from "fs/promises";
export function convertFileToPNG(file: Express.Multer.File): Promise<Buffer> {
return new Promise<Buffer>((_r, _e) => {
console.log(file);
// Read the file
fs.readFile(file.path)
.then( fileBuffer => {
let p = new Poppler(`/usr/bin`);
p.pdfToCairo(fileBuffer, undefined, {
pngFile: true,
singleFile: true,
})
.then( buff => {
if ( buff instanceof Error ) {
return _e(buff);
}
_r(Buffer.from(buff));
})
.catch(err => {
_e(err);
})
})
.catch( err => {
return _e(err);
})
})
}

23
src/Routes/Api.ts Normal file
View File

@ -0,0 +1,23 @@
// Imports
import express from 'express';
import multer from 'multer';
import { convertController } from '../Controllers/Convert';
const upload = multer({ dest: '/tmp' });
// Get the router
const router = express.Router();
router.get(`/`, (req, res, next) => {
res.status(200).send({
status: "Healthy",
healthStatus: "100%",
version: "1.0.0",
});
})
// Set the route
router.post("/convert", upload.any(), convertController);
// Export the reouter
export {router as apiRouter};

3
src/app.ts
View File

@ -4,6 +4,7 @@ import express from 'express';
import config from './Config/config';
import { engine } from 'express-handlebars';
import { homepageRouter } from './Routes/Homepage';
import { apiRouter } from './Routes/Api';
//#endregion
@ -58,6 +59,8 @@ router.use((req, res, next) => {
router.use(`/public`, express.static('./src/public/'));
// Handle the homepage
router.use("/api", apiRouter);
router.get("/", homepageRouter);
{ // Error handling