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bbottema /
Last active Jul 5, 2020
Utility code for creating SSLSocketFactory for sending email
package org.simplejavamail.sslhelper;
import org.simplejavamail.internal.util.MiscUtil;
public class KeyStoreInfo {
private final String keyStorePath;
private final String password;
private final String type /*= "JKS"*/;
bbottema / test-lossy-webp-support.js
Created Dec 27, 2019
Ways of detecting webp browser support
View test-lossy-webp-support.js
// works for all browsers
async function supportsWebp():Promise<boolean> {
const img = new Image();
return new Promise(resolve => {
img.onload = function () {resolve((img.width > 0) && (img.height > 0));};
img.onerror = function () {resolve(false);};
img.src = "data:image/webp;base64," + "UklGRiIAAABXRUJQVlA4IBYAAAAwAQCdASoBAAEADsD+JaQAA3AAAAAA";
bbottema /
Created Jun 25, 2019 — forked from alvarow/
OpenSSL and Keytool cheat sheet
# Generate a new key
openssl genrsa -out server.key 2048
# Generate a new CSR
openssl req -sha256 -new -key server.key -out server.csr
# Check certificate against CA
openssl verify -verbose -CApath ./CA/ -CAfile ./CA/cacert.pem cert.pem
# Self Signed
bbottema /
Last active Jul 20, 2019
Mimetypes compiled from two big public lists
class MimeType {
private static final MimetypesFileTypeMap MIMETYPES_FILE_TYPE_MAP = createMap();
* @return a vastly improved mimetype map
private static MimetypesFileTypeMap createMap() {
try (InputStream is = MimeType.class.getClassLoader().getResourceAsStream("mimetypes.txt")) {
return new MimetypesFileTypeMap(is);
bbottema /
Created Mar 4, 2019 — forked from chrisnicola/
Is REST specific to HTTP?

Davy Brion and Jef Claes were discussing whether or not you can have REST without HTTP. Is this another peanut butter and chocolate thing? I think it's hard to extract REST from HTTP because that is how it is defined. I mean quite literally how it is defined in Fielding's dissertation. REST, the term, is short for "representational state transfer" but it still specifically describes an architectural style of representing state transfer via the HTTP specification.

But what if we didn't let such a little thing like semantics get in our way here and only took REST for it's literal name definition and not as the specification laid out in Fielding's dissertation? What if REST only meant a representation of state transfers? I'm not muc

bbottema /
Last active Dec 4, 2018
Truncate GIT history
# <commit-rev> = commit you want to reset repo to
# <target-branch> = branch you want to truncate (probably master or develop)
git checkout --orphan temp <commit-rev>
git commit -m "Truncate history or Initial commit"
git rebase --onto temp <commit-rev> <target-branch>
git push --force
bbottema /
Created Sep 6, 2018
Minimal Dijkstra Java (uses Lombok)
// cleaned up generics version of Baeldung's Dijkstra (
public class Dijkstra {
public static <T> void findShortestPathToAllOtherNodes(Node<T> startingPoint) {
Set<Node<T>> settledNodes = new HashSet<>();
Set<Node<T>> unsettledNodes = new HashSet<>();
bbottema / index.html
Created Jun 7, 2018
Console log to HTML
View index.html
<!DOCTYPE html>
<meta charset="UTF-8">
<title>Log to HTML</title>
<link rel="icon" href="data:;base64,=">
(function(eleLocator) {
bbottema / List 2 Pairs
Created Oct 23, 2017 — forked from ktejnora/List 2 Pairs
Java 8 Create list of pairs from List of items. Java does not have Pair and groupBy uses AtomicInteger trick.
View List 2 Pairs
package cz.tejnora.pokusy;
import static;
import static org.hamcrest.MatcherAssert.assertThat;
import java.util.Arrays;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
bbottema /
Last active Oct 20, 2020
Demonstration of various techniques for sorting based on multiple properties. Also, see:
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.List;
import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.comparators.ComparatorChain;
import org.apache.commons.lang3.builder.CompareToBuilder;