ahmed-musallam

How to compress PDF using ghostscript

As a developer, it bothers me when someone sends me a large pdf file compared to the number of pages. Recently, I recieved a 12MB scanned document for just one letter-sized page... so I got to googlin, like I usually do, and found ghostscript!

to learn more abot ghostscript (gs): https://www.ghostscript.com/

What we are interested in, is the gs command line tool, which provides many options for manipulating PDF, but we are interested in compressign those large PDF's into small yet legible documents.

credit goes to this answer on askubuntu forum: https://askubuntu.com/questions/3382/reduce-filesize-of-a-scanned-pdf/3387#3387?newreg=bceddef8bc334e5b88bbfd17a6e7c4f9

ahmed-musallam

# Required deps:
# imagemagick: https://imagemagick.org/script/download.php

# name of your master icon, must be at least 512X512
PNG_MASTER="icon-large.png"

ICONSET_FOLDER="AppIcon.iconset"
sizes=(
  16x16
  32x32

ahmed-musallam

package com.ahmedmusallam.service;

import java.io.IOException;
import java.net.URI;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

ahmed-musallam

export class EventUtil
{
  private static observable = $({});

  /**
   * Subscribe to an event
   */
  public static subscribe = function(...args){
    EventUtil.observable.on.apply(EventUtil.observable, args);

ahmed-musallam

How to fix AEM error org.apache.jackrabbit.vault.fs.impl.io.GenericArtifactHandler Error while parsing when deploying AEM package

I ran into this issue with one of the projects I was working on, AEM throws this very unhelpful error:

rg.apache.jackrabbit.vault.fs.impl.io.GenericArtifactHandler Error while parsing <path here>/.content.xml: {}
org.xml.sax.SAXException: null
	at org.apache.jackrabbit.vault.fs.impl.io.DocViewSAXImporter.startElement(DocViewSAXImporter.java:662)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:509)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(XMLNSDocumentScannerImpl.java:374)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2784)

ahmed-musallam

/**
 * A simple circular data structure
 */
function Circular(arr, startIntex){
  this.arr = arr;
  this.currentIndex = startIntex || 0;
}

Circular.prototype.next = function(){
  var i = this.currentIndex, arr = this.arr;

ahmed-musallam

// this code is the same as the servlet but for grovy console: https://github.com/OlsonDigital/aem-groovy-console
// OPTIONS
def PATH = '/content/dam/'


def query = createQuery([path:PATH, type:'nt:file', 'p.limit':'99999999999999999'])
def  result = query.getResult();
long totalSizeInKB = 0
result.getHits().each{
    def node = it.node

ahmed-musallam

A simple groovy console script to find AEM pages with a certain component then display them in a nice table

Copy script to AEM groovy console, change parameters and run!

ahmed-musallam

// poll async featch calls in a syncronized fashion, IE do not start the next function call until the previous was resolved.
// also allows for throttling :) 
async function poll(fn, onData, throttle) {
    const _throttle = throttle || 5000;
    let lastPollStarted;
    async function _poll(_fn, _onData) {
        lastPollStarted = new Date().getTime();
        let response = await _fn();
        if (response.status === 200) {
            // Get and show the message

ahmed-musallam

<!--
I use this setup primarely on jsfiddle where I do not want to open chrome console while testing js code.
example: https://jsfiddle.net/wybmxgop/1/
-->

<!-- a Mono-spaced font-->
<link href="https://fonts.googleapis.com/css?family=Roboto+Mono" rel="stylesheet">
<style>
ul#console {
  list-style-type: none;