1825 lines
66 KiB
HTML
1825 lines
66 KiB
HTML
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<!DOCTYPE html>
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<html lang='en'>
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<head>
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<meta charset='UTF-8' />
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<meta name='viewport' content='width=device-width, initial-scale=1' />
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<title>
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Webapp-Development in Haskell – Home
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</title>
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<meta property='og:description' content='Step-by-Step-Anleitung, wie man ein neues Projekt mit einer bereits erprobten Pipeline erstellt.' />
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<meta property='og:site_name' content='Home' />
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<meta property='og:image' content />
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<meta property='og:type' content='website' />
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<meta property='og:title' content='Webapp-Development in Haskell' />
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<base href='/' />
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<link href='favicon.svg' rel='icon' />
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<script>
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window.MathJax = {
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startup: {
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ready: () => {
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MathJax.startup.defaultReady();
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}
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}
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};
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</script>
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<script async id='MathJax-script' src='https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js'></script>
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<!-- mermaid.js --><script src='https://cdn.jsdelivr.net/npm/mermaid/dist/mermaid.min.js'></script>
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<script>
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mermaid.initialize({startOnLoad:false});
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mermaid.init(undefined,document.querySelectorAll(".mermaid"));
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</script>
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<!-- highlight.js -->
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<link rel='stylesheet' href='https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.6.0/styles/hybrid.min.css' />
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<script src='https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.6.0/highlight.min.js'></script>
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<!-- Include languages that Emanote itself uses -->
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<script src='https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.6.0/languages/haskell.min.js'></script>
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<script src='https://cdnjs.cloudflare.com/ajax/libs/highlight.js/11.6.0/languages/nix.min.js'></script>
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<script>hljs.highlightAll();</script>
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<link href='tailwind.css?instanceId=faa07eb7-0f7a-4cb2-8347-d9aa01265a0e' rel='stylesheet' type='text/css' />
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<!-- Heist error element -->
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<style>
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strong.error {
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color: lightcoral;
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font-size: 90%;
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font-family: monospace;
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}
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</style>
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<!-- What goes in this file will appear on near the end of <head>--><link rel='preload' href='_emanote-static/fonts/Maven_Pro/MavenPro-VariableFont_wght.ttf' as='font' type='font/ttf' crossorigin />
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<style>
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@font-face {
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font-family: 'MavenPro';
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/* FIXME: This ought to be: ${ema:emanoteStaticLayerUrl}/fonts/Maven_Pro/MavenPro-VariableFont_wght.ttf */
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src: url(_emanote-static/fonts/Maven_Pro/MavenPro-VariableFont_wght.ttf) format("truetype");
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font-display: swap;
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}
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body {
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font-family: 'MavenPro', sans-serif;
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/* font-variation-settings: 'wght'300; */
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}
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a.mavenLinkBold {
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font-variation-settings: 'wght'500;
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}
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strong {
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font-variation-settings: 'wght'500;
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}
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h1,
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h2,
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h3,
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h4,
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h5,
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h6,
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header,
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.header-font {
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font-family: 'MavenPro', sans-serif;
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}
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</style>
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<link rel='stylesheet' href='_emanote-static/inverted-tree.css' />
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<link rel='stylesheet' href='https://files.stork-search.net/releases/v1.5.0/flat.css' />
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<!-- Custom Stork-search styling for Emanote -->
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<style>
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#stork-search-container {
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z-index: 1000;
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background-color: rgb(15 23 42/.8);
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}
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.stork-overflow-hidden-important {
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overflow: hidden !important;
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}
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</style>
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<script src='https://files.stork-search.net/releases/v1.5.0/stork.js'></script>
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<script data-emanote-base-url='/'>
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window.emanote = {};
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window.emanote.stork = {
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searchShown: false,
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toggleSearch: function () {
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document.getElementById('stork-search-container').classList.toggle('hidden');
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window.emanote.stork.searchShown = document.body.classList.toggle('stork-overflow-hidden-important');
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if (window.emanote.stork.searchShown) {
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document.getElementById('stork-search-input').focus();
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}
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},
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clearSearch: function () {
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document.getElementById('stork-search-container').classList.add('hidden');
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document.body.classList.remove('stork-overflow-hidden-important');
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window.emanote.stork.searchShown = false;
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},
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init: function () {
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const indexName = 'emanote-search'; // used to match input[data-stork] attribute value
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const baseUrl = document.currentScript.getAttribute('data-emanote-base-url') || '/';
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const indexUrl = baseUrl + '-/stork.st';
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if (document.readyState !== 'complete') {
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window.addEventListener('load', function () {
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stork.register(indexName, indexUrl);
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});
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document.addEventListener('keydown', event => {
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if (window.emanote.stork.searchShown && event.key === 'Escape') {
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window.emanote.stork.clearSearch();
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event.preventDefault();
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} else if ((event.key == 'k' || event.key == 'K') && (event.ctrlKey || event.metaKey)) {
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window.emanote.stork.toggleSearch();
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event.preventDefault();
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}
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});
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} else {
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// Override existing on Ema's hot-reload
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stork.register(indexName, indexUrl, { forceOverwrite: true });
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}
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}
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};
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window.emanote.stork.init();
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</script>
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</head>
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<!-- DoNotFormat -->
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<!-- DoNotFormat -->
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<body class='bg-gray-400 overflow-y-scroll'>
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<div class='container mx-auto'>
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<nav id='breadcrumbs' class='w-full text-gray-700 md:hidden'>
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<div class='flex justify-left'>
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<div class='w-full px-2 py-2 bg-gray-50'>
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<ul class='flex flex-wrap text-lg'>
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<li class='inline-flex items-center'>
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<img style='width: 1rem;' src='favicon.svg' />
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</li>
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<li class='inline-flex items-center'>
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<a class='px-1 font-bold' href=''>
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Home
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</a>
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<svg fill='currentColor' viewBox='0 0 20 20' class='w-auto h-5 text-gray-400'>
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<path fill-rule='evenodd' d='M7.293 14.707a1 1 0 010-1.414L10.586 10 7.293 6.707a1 1 0 011.414-1.414l4 4a1 1 0 010 1.414l-4 4a1 1 0 01-1.414 0z' clip-rule='evenodd'></path>
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</svg>
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</li>
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<li class='inline-flex items-center'>
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<a class='px-1 font-bold' href='Haskell'>
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Haskell
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</a>
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<svg fill='currentColor' viewBox='0 0 20 20' class='w-auto h-5 text-gray-400'>
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<path fill-rule='evenodd' d='M7.293 14.707a1 1 0 010-1.414L10.586 10 7.293 6.707a1 1 0 011.414-1.414l4 4a1 1 0 010 1.414l-4 4a1 1 0 01-1.414 0z' clip-rule='evenodd'></path>
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</svg>
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</li>
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</ul>
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</div>
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<button class='inline px-2 py-1 bg-gray-50 outline-none cursor-pointer focus:outline-none' title='Search (Ctrl+K)' type='button' onclick='window.emanote.stork.toggleSearch()'>
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<svg xmlns='http://www.w3.org/2000/svg' style='width: 1rem;' class='hover:text-red-700' f
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fill='none' viewBox='0 0 24 24' stroke='currentColor' stroke-width='2'>
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<path stroke-linecap='round' stroke-linejoin='round' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'></path>
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</svg>
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</button>
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<button class='inline px-2 py-1 text-white bg-red-600 outline-none cursor-pointer focus:outline-none' title='Toggle sidebar' type='button' onclick="toggleHidden('sidebar')">
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<svg xmlns='http://www.w3.org/2000/svg' class='w-4' fill='none' viewBox='0 0 24 24' stroke='currentColor'>
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<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 6h16M4 12h16M4 18h16'></path>
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</svg>
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</button>
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<script>
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function toggleHidden(elemId) {
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document.getElementById(elemId).classList.toggle("hidden");
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}
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</script>
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</div>
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</nav>
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<div id='container' class='flex flex-nowrap flex-col md:flex-row bg-gray-50 md:mt-8 md:shadow-2xl md:mb-8'>
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<!-- Sidebar column -->
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<nav id='sidebar' class='flex-shrink hidden leading-relaxed md:block md:sticky md:top-0 md:h-full md:w-48 xl:w-64'>
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<div class='px-2 py-2 text-gray-800'>
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<div id='indexing-links' class='flex flex-row float-right p-2 space-x-2 text-gray-500'>
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<a href='-/tags' title='View tags'>
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<svg style='width: 1rem;' class='hover:text-red-700' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
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<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 7h.01M7 3h5c.512 0 1.024.195 1.414.586l7 7a2 2 0 010 2.828l-7 7a2 2 0 01-2.828 0l-7-7A1.994 1.994 0 013 12V7a4 4 0 014-4z'>
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</path>
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</svg>
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</a>
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<a href='-/all' title='Expand full tree'>
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<svg style='width: 1rem;' class='hover:text-red-700' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
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<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 8V4m0 0h4M4 4l5 5m11-1V4m0 0h-4m4 0l-5 5M4 16v4m0 0h4m-4 0l5-5m11 5l-5-5m5 5v-4m0 4h-4'>
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</path>
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</svg>
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</a>
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<a title='Search (Ctrl+K)' class='cursor-pointer' onclick='window.emanote.stork.toggleSearch()'>
|
|||
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<svg xmlns='http://www.w3.org/2000/svg' style='width: 1rem;' class='hover:text-red-700' f
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fill='none' viewBox='0 0 24 24' stroke='currentColor' stroke-width='2'>
|
|||
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<path stroke-linecap='round' stroke-linejoin='round' d='M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z'></path>
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</svg>
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</a>
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</div>
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|
|||
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<div id='site-logo' class='pl-2'>
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<div class='flex items-center my-2 space-x-2 justify-left'>
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<a href='' title='Go to Home'>
|
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<!-- The style width attribute here is to prevent huge
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icon from displaying at those rare occasions when Tailwind
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hasn't kicked in immediately on page load
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-->
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<img style='width: 1rem;' class='transition transform hover:scale-110 hover:opacity-80' src='favicon.svg' />
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</a>
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<a class='font-bold truncate' title='Go to Home' href=''>
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Home
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</a>
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</div>
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</div>
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<!-- Variable bindings for this tree-->
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<!-- Rendering of this tree -->
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<div class='pl-2'>
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<!-- Node's rootLabel-->
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<div class='flex items-center my-2 space-x-2 justify-left'>
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<svg xmlns='http://www.w3.org/2000/svg' class='w-4 h-4 flex-shrink-0 inline text-gray-700' viewBox='0 0 20 20' fill='currentColor'>
|
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<path fill-rule='evenodd' d='M2 6a2 2 0 012-2h4l2 2h4a2 2 0 012 2v1H8a3 3 0 00-3 3v1.5a1.5 1.5 0 01-3 0V6z' clip-rule='evenodd'></path>
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<path d='M6 12a2 2 0 012-2h8a2 2 0 012 2v2a2 2 0 01-2 2H2h2a2 2 0 002-2v-2z'></path>
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</svg>
|
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|
|||
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|
|||
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<a class='font-bold hover:underline truncate' title='About' href='About'>
|
|||
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About
|
|||
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</a>
|
|||
|
|
|||
|
|
|||
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</div>
|
|||
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|
|||
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<!-- Node's children forest, displayed only on active trees
|
|||
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TODO: Use <details> to toggle visibility?
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|||
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-->
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|||
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|
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|
|||
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<!-- Variable bindings for this tree-->
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|
|||
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|||
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<!-- Rendering of this tree -->
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|||
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<div class='pl-2'>
|
|||
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<!-- Node's rootLabel-->
|
|||
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<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
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|
|||
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<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
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</path>
|
|||
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</svg>
|
|||
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|
|||
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|
|||
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<a class='hover:underline truncate' title='Highlights of my experiences in the programming world' href='About/Experience'>
|
|||
|
Highlights of my experiences in the programming world
|
|||
|
</a>
|
|||
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|
|||
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|
|||
|
</div>
|
|||
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|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
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|
|||
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|
|||
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|
|||
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</div>
|
|||
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|
|||
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<!-- Variable bindings for this tree-->
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|||
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|
|||
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|
|||
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<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
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<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
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<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
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<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
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|||
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</path>
|
|||
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</svg>
|
|||
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|
|||
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|
|||
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<a class='hover:underline truncate' title='Stefan Dresselhaus' href='About/CV'>
|
|||
|
Stefan Dresselhaus
|
|||
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</a>
|
|||
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|
|||
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|
|||
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</div>
|
|||
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|
|||
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<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
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|
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|||
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|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='Studium generale / University-Life' href='About/Extracurricular'>
|
|||
|
Studium generale / University-Life
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='Work-Experience' href='About/Work'>
|
|||
|
Work-Experience
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg xmlns='http://www.w3.org/2000/svg' class='w-4 h-4 flex-shrink-0 inline text-gray-700' viewBox='0 0 20 20' fill='currentColor'>
|
|||
|
<path fill-rule='evenodd' d='M2 6a2 2 0 012-2h4l2 2h4a2 2 0 012 2v1H8a3 3 0 00-3 3v1.5a1.5 1.5 0 01-3 0V6z' clip-rule='evenodd'></path>
|
|||
|
<path d='M6 12a2 2 0 012-2h8a2 2 0 012 2v2a2 2 0 01-2 2H2h2a2 2 0 002-2v-2z'></path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='font-bold hover:underline truncate' title='Android' href='Android'>
|
|||
|
Android
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='Einrichtung Android-Smartphones' href='Android/Einrichtung'>
|
|||
|
Einrichtung Android-Smartphones
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg xmlns='http://www.w3.org/2000/svg' class='w-4 h-4 flex-shrink-0 inline text-gray-700' viewBox='0 0 20 20' fill='currentColor'>
|
|||
|
<path fill-rule='evenodd' d='M2 6a2 2 0 012-2h4l2 2h4a2 2 0 012 2v1H8a3 3 0 00-3 3v1.5a1.5 1.5 0 01-3 0V6z' clip-rule='evenodd'></path>
|
|||
|
<path d='M6 12a2 2 0 012-2h8a2 2 0 012 2v2a2 2 0 01-2 2H2h2a2 2 0 002-2v-2z'></path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='font-bold hover:underline truncate' title='Haskell' href='Haskell'>
|
|||
|
Haskell
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg xmlns='http://www.w3.org/2000/svg' class='w-4 h-4 flex-shrink-0 inline text-gray-700' viewBox='0 0 20 20' fill='currentColor'>
|
|||
|
<path fill-rule='evenodd' d='M2 6a2 2 0 012-2h4l2 2h4a2 2 0 012 2v1H8a3 3 0 00-3 3v1.5a1.5 1.5 0 01-3 0V6z' clip-rule='evenodd'></path>
|
|||
|
<path d='M6 12a2 2 0 012-2h8a2 2 0 012 2v2a2 2 0 01-2 2H2h2a2 2 0 002-2v-2z'></path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='font-bold hover:underline truncate' title='Code-Snippets' href='Haskell/Code%20Snippets'>
|
|||
|
Code-Snippets
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='*-Morpisms' href='Haskell/Code%20Snippets/Morphisms'>
|
|||
|
*-Morpisms
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='Monoid? Da war doch was…' href='Haskell/Code%20Snippets/Monoid'>
|
|||
|
Monoid? Da war doch was…
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='Fortgeschrittene funktionale Programmierung in Haskell' href='Haskell/FFPiH'>
|
|||
|
Fortgeschrittene funktionale Programmierung in Haskell
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='Lenses' href='Haskell/Lenses'>
|
|||
|
Lenses
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 21h10a2 2 0 002-2V9.414a1 1 0 00-.293-.707l-5.414-5.414A1 1 0 0012.586 3H7a2 2 0 00-2 2v14a2 2 0 002 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='hover:underline truncate' title='Talks und Posts zu Haskell' href='Haskell/Advantages'>
|
|||
|
Talks und Posts zu Haskell
|
|||
|
</a>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Node's children forest, displayed only on active trees
|
|||
|
TODO: Use <details> to toggle visibility?
|
|||
|
-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<!-- Variable bindings for this tree-->
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
|
|||
|
<!-- Rendering of this tree -->
|
|||
|
<div class='pl-2'>
|
|||
|
<!-- Node's rootLabel-->
|
|||
|
<div class='flex items-center my-2 space-x-2 justify-left'>
|
|||
|
|
|||
|
|
|||
|
<svg class='w-4 h-4 flex-shrink-0 inline' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
|
|||
|
|
|||
|
<a class='font-bold text-red-600 hover:underline truncate' title='Webapp-Development in Haskell' href='Haskell/Webapp_Development'>
|
|||
|
Webapp-Development in Haskell
|
|||
|
</a>
|
|||
|
|
|||
|
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|||
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|
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|
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|
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|
|||
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|
|||
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|
|||
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<a class='hover:underline truncate' title='Logik für Dummies' href='Logik'>
|
|||
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Logik für Dummies
|
|||
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|
|||
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|
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|
|||
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Uni
|
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|
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<a class='hover:underline truncate' title='Wie lerne ich richtig an der Uni?' href='Uni/Lernerfolg_an_der_Uni'>
|
|||
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Wie lerne ich richtig an der Uni?
|
|||
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|
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|
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|
|||
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|
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<path fill-rule='evenodd' d='M2 6a2 2 0 012-2h4l2 2h4a2 2 0 012 2v1H8a3 3 0 00-3 3v1.5a1.5 1.5 0 01-3 0V6z' clip-rule='evenodd'></path>
|
|||
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|
|||
|
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|
|||
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|
|||
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|
|||
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|
|||
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Unix
|
|||
|
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|
|||
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|
|||
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|
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|
|||
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|
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|
|||
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|
|||
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|
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|
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|
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|
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|
|||
|
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|
|||
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|
|||
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|
|||
|
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|
|||
|
SSH-Filter
|
|||
|
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|
|||
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|
|||
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|
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|
|||
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|
|||
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|
|||
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|
|||
|
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|
|||
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|
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|
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|
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|
|||
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|
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|
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|
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|
|||
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|
|||
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|
|||
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|
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|
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|
|||
|
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|
|||
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|
|||
|
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|
|||
|
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|
|||
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|
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|
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|
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|
|||
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|
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|
|||
|
|
|||
|
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|
|||
|
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|
|||
|
Haskell
|
|||
|
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|
|||
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|
|||
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|
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|
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|
|||
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|
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|
|||
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|
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|
|||
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|
|||
|
Home
|
|||
|
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|
|||
|
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|
|||
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|
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|
|||
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|
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|
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|
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|
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|
|||
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|
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|
|||
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|
|||
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|
|||
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<h1 class='flex items-end justify-center mb-4 p-3 bg-red-100 text-5xl font-extrabold text-black rounded'>
|
|||
|
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|
|||
|
Webapp-Development in Haskell
|
|||
|
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|
|||
|
</h1>
|
|||
|
<article class='overflow-auto'>
|
|||
|
<!-- What goes in this file will appear on top of note body-->
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Step-by-Step-Anleitung, wie man ein neues Projekt mit einer bereits erprobten Pipeline erstellt.
|
|||
|
</p>
|
|||
|
<h2 id='definition-der-api' class='inline-block mt-6 mb-4 text-4xl font-bold text-gray-700 border-b-2'>Definition der API</h2>
|
|||
|
<p class='mb-3'>
|
|||
|
Erster Schritt ist immer ein wünsch-dir-was bei der Api-Defenition.
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Die meisten Services haben offensichtliche Anforderungen (Schnittstellen nach draußen, Schnittstellen intern, …). Diese kann man immer sehr gut in einem <code class='py-0.5 px-0.5 bg-gray-100'>Request -> Response</code>-Model erfassen.
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Diese Definition läuft über openapi-v3 und kann z.b. mit Echtzeit-Vorschau im <a href='http://editor.swagger.io/' class='text-red-600 hover:underline' target='_blank' rel='noopener'>http://editor.swagger.io/</a> erspielen. Per Default ist der noch auf openapi-v2 (aka swagger), kann aber auch v3.
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Nach der Definition, was man am Ende haben möchte, muss man sich entscheiden, in welcher Sprache man weiter entwickelt. Ich empfehle aus verschiedenen Gründen primär 2 Sprachen: Python-Microservices (weil die ML-Libraries sehr gut sind, allerdings Änderungen meist schwer sind und der Code wenig robust - meist nur 1 API-Endpunkt pro service) und Haskell (stabilität, performace, leicht zu ändern, gut anzupassen).
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Im folgenden wird (aus offensichtlichen Gründen) nur auf das Haskell-Projekt eingegangen.
|
|||
|
</p>
|
|||
|
<h2 id='startprojekt-in-haskell' class='inline-block mt-6 mb-4 text-4xl font-bold text-gray-700 border-b-2'>Startprojekt in Haskell</h2><h3 id='erstellen-eines-neuen-projektes' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>Erstellen eines neuen Projektes</h3>
|
|||
|
<p class='mb-3'>
|
|||
|
zunächst erstellen wir in normales Haskell-Projekt ohne funktionalität & firlefanz:
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='bash language-bash'>stack new myservice</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
Dies erstellt ein neues Verzeichnis und das generelle scaffolding. Nach einer kurzen anpassung der stack.yaml (resolver auf unserer setzen; aktuell: lts-17.4) fügen wir am Ende der Datei
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='yaml language-yaml'>allow-newer: true
|
|||
|
ghc-options:
|
|||
|
"$locals": -fwrite-ide-info</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
ein. Anschließend organisieren wir uns noch eine gute <code class='py-0.5 px-0.5 bg-gray-100'>.gitignore</code> und initialisieren das git mittels <code class='py-0.5 px-0.5 bg-gray-100'>git init; git add .; git commit -m "initial scaffold"</code>
|
|||
|
</p>
|
|||
|
<h3 id='generierung-der-api' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>Generierung der API</h3>
|
|||
|
<p class='mb-3'>
|
|||
|
Da die API immer wieder neu generiert werden kann (und sollte!) liegt sich in einem unterverzeichnis des Haputprojektes.
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Initial ist es das einfachste ein leeres temporäres Verzeichnis woanders zu erstellen, die <code class='py-0.5 px-0.5 bg-gray-100'>api-doc.yml</code> hinein kopieren und folgendes ausführen:
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='bash language-bash'>openapi-generator generate -g haskell -o . -i api-doc.yml</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
Dieses erstellt einem dann eine komplette library inkl. Datentypen. Wichtig: Der Name in der api-doc sollte vom Namen des Services (oben myservice) abweichen - entweder in Casing oder im Namen direkt. Suffixe wie API schneidet der Generator hier leider ab. (Wieso das ganze? Es entstehen nachher 2 libraries, foo & fooAPI. Da der generator das API abschneidet endet man mit foo & foo und der compiler meckert, dass er nicht weiss, welche lib gemeint ist).
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
danach: wie gewohnt <code class='py-0.5 px-0.5 bg-gray-100'>git init; git add .; git commit -m "initial"</code>. Auf dem Server der Wahl (github, gitea, gitlab, …) nun ein Repository erstellen (am Besten: myserviceAPI - alles auf API endend ist autogeneriert!) und den Anweisungen nach ein remote hinzufügen & pushen.
|
|||
|
</p>
|
|||
|
<h4 id='wieder-zurück-im-haskell-service' class='mt-6 mb-2 text-2xl font-bold text-gray-700'>Wieder zurück im Haskell-Service</h4>
|
|||
|
<p class='mb-3'>
|
|||
|
In unserem eigentlichen Service müssen wir nun die API einbinden. Dazu erstellen wir ein Verzeichnis <code class='py-0.5 px-0.5 bg-gray-100'>libs</code> (konvention) und machen ein <code class='py-0.5 px-0.5 bg-gray-100'>git submodule add <repository-url> libs/myserviceAPI</code>
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Git hat nun die API in das submodul gepackt und wir können das oben erstellte temporäre verzeichnis wieder löschen.
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Anschließend müssen wir stack noch erklären, dass wir die API da nun liegen haben und passen wieder die stack.yaml an, indem wir das Verzeichnis unter packages hinzufügen.
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='yaml language-yaml'>packages:
|
|||
|
- .
|
|||
|
- libs/myserviceAPI # <<</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
nun können wir in der <code class='py-0.5 px-0.5 bg-gray-100'>package.yaml</code> (oder <code class='py-0.5 px-0.5 bg-gray-100'>myservice.cabal</code>, falls kein hpack verwendet wird) unter den dependencies unsere api hinzufügen (name wie die cabal-datei in libs/myserviceAPI).
|
|||
|
</p>
|
|||
|
<h3 id='einbinden-anderer-microservices' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>Einbinden anderer Microservices</h3>
|
|||
|
<p class='mb-3'>
|
|||
|
Funktioniert komplett analog zu dem vorgehen oben (ohne das generieren natürlich ;) ). <code class='py-0.5 px-0.5 bg-gray-100'>stack.yaml</code> editieren und zu den packages hinzufügen:
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='yaml language-yaml'>packages:
|
|||
|
- .
|
|||
|
- libs/myserviceAPI
|
|||
|
- libs/myCoolMLServiceAPI</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
in der <code class='py-0.5 px-0.5 bg-gray-100'>package.yaml</code> (oder der cabal) die dependencies hinzufügen und schon haben wir die Features zur Verfügung und können gegen diese Services reden.
|
|||
|
</p>
|
|||
|
<h3 id='entfernen-von-anderen-technologienmicroservices' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>Entfernen von anderen Technologien/Microservices</h3>
|
|||
|
<p class='mb-3'>
|
|||
|
In git ist das entfernen von Submodules etwas frickelig, daher hier ein copy&paste der <a href='https://gist.github.com/myusuf3/7f645819ded92bda6677' class='text-red-600 hover:underline' target='_blank' rel='noopener'>GitHub-Antwort</a>:
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='bash language-bash'>## Remove the submodule entry from .git/config
|
|||
|
git submodule deinit -f path/to/submodule
|
|||
|
|
|||
|
## Remove the submodule directory from the superproject's .git/modules directory
|
|||
|
rm-rf .git/modules/path/to/submodule
|
|||
|
|
|||
|
## Remove the entry in .gitmodules and remove the submodule directory located at path/to/submodule
|
|||
|
git rm-f path/to/submodule</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
Falls das nicht klappt, gibt es alternative Vorschläge unter dem Link oben.
|
|||
|
</p>
|
|||
|
<h3 id='woher-weiss-ich-was-wo-liegt-dokumentation-halloo' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>Woher weiss ich, was wo liegt? Dokumentation? Halloo??</h3>
|
|||
|
<p class='mb-3'>
|
|||
|
Keine Panik. Ein <code class='py-0.5 px-0.5 bg-gray-100'>stack haddock --open</code> hilft da. Das generiert die Dokumentation für alle in der <code class='py-0.5 px-0.5 bg-gray-100'>package.yaml</code> (oder cabal-file) eingetragenen dependencies inkl. aller upstream-dependencies. Man bekommt also eine komplette lokale Dokumentation von allem. Geöffnet wird dann die Paket-Startseite inkl. der direkten dependencies:
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Es gibt 2 wichtige Pfade im Browser:
|
|||
|
</p>
|
|||
|
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
…../all/index.html - hier sind alle Pakete aufgeführt
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
…../index.html - hier sind nur die direkten dependencies aufgeführt.
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Wenn man einen lokalen Webserver startet kann man mittels “s” auch die interaktive Suche öffnen (Suche nach Typen, Funktionen, Signaturen, etc.). In Bash mit python3 geht das z.b. einfach über:
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='bash language-bash'>cd $(stack path --local-doc-root)
|
|||
|
python3 -m SimpleHTTPServer 8000
|
|||
|
firefox "http://localhost:8000"</code></pre></div><h3 id='implementation-des-services-und-start' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>Implementation des Services und Start</h3><h4 id='loaderbootstrapper' class='mt-6 mb-2 text-2xl font-bold text-gray-700'>Loader/Bootstrapper</h4>
|
|||
|
<p class='mb-3'>
|
|||
|
Generelles Vorgehen:
|
|||
|
</p>
|
|||
|
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
in app/Main.hs: Hier ist quasi immer nur eine Zeile drin: <code class='py-0.5 px-0.5 bg-gray-100'>main = myServiceMain</code>
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Grund: Applications tauchen nicht im Haddock auf. Also haben wir ein “src”-Modul, welches hier nur geladen & ausgeführt wird.
|
|||
|
</p>
|
|||
|
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
in src/MyService.hs: <code class='py-0.5 px-0.5 bg-gray-100'>myServiceMain :: IO ()</code> definieren
|
|||
|
</p>
|
|||
|
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Für die Main kann man prinzipiell eine Main andere Services copy/pasten. Im folgenden eine Annotierte main-Funktion - zu den einzelnen Vorraussetzungen kommen wir im Anschluss.
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='haskell language-haskell'>{-# OPTIONS_GHC -Wno-name-shadowing #-}
|
|||
|
{-# LANGUAGE FlexibleContexts #-}
|
|||
|
{-# LANGUAGE LambdaCase #-}
|
|||
|
{-# LANGUAGE OverloadedStrings #-}
|
|||
|
{-# LANGUAGE RankNTypes #-}
|
|||
|
{-# LANGUAGE RecordWildCards #-}
|
|||
|
{-# LANGUAGE ScopedTypeVariables #-}
|
|||
|
module MyService where
|
|||
|
|
|||
|
-- generische imports aus den dependencies/base, nicht in der prelude
|
|||
|
import Codec.MIME.Type
|
|||
|
import Configuration.Dotenv as Dotenv
|
|||
|
import Control.Concurrent (forkIO, threadDelay)
|
|||
|
import Control.Concurrent.Async
|
|||
|
import Control.Concurrent.STM
|
|||
|
import Control.Monad
|
|||
|
import Control.Monad.Catch
|
|||
|
import Control.Monad.Except
|
|||
|
import Conversion
|
|||
|
import Conversion.Text ()
|
|||
|
import Data.Binary.Builder
|
|||
|
import Data.String (IsString (..))
|
|||
|
import Data.Time
|
|||
|
import Data.Time.Clock
|
|||
|
import Data.Time.Format
|
|||
|
import Data.Default
|
|||
|
import Network.HostName
|
|||
|
import Network.HTTP.Client as HTTP hiding
|
|||
|
(withConnection)
|
|||
|
import Network.HTTP.Types (Status, statusCode)
|
|||
|
import Network.Mom.Stompl.Client.Queue
|
|||
|
import Network.Wai (Middleware)
|
|||
|
import Network.Wai.Logger
|
|||
|
import Network.Wai.Middleware.Cors
|
|||
|
import Network.Wai.Middleware.RequestLogger (OutputFormat (..),
|
|||
|
logStdout,
|
|||
|
mkRequestLogger,
|
|||
|
outputFormat)
|
|||
|
import Servant.Client (mkClientEnv,
|
|||
|
parseBaseUrl)
|
|||
|
import System.Directory
|
|||
|
import System.Envy
|
|||
|
import System.IO
|
|||
|
import System.Log.FastLogger
|
|||
|
import Text.PrettyPrint.GenericPretty
|
|||
|
|
|||
|
-- generische imports, aber qualified, weil es sonst zu name-clashes kommt
|
|||
|
|
|||
|
import qualified Data.ByteString as BS
|
|||
|
-- import qualified Data.ByteString.Char8 as BS8
|
|||
|
import qualified Data.ByteString.Lazy as LBS
|
|||
|
import qualified Network.HTTP.Client.TLS as UseDefaultHTTPSSettings (tlsManagerSettings)
|
|||
|
import qualified Network.Mom.Stompl.Client.Queue as AMQ
|
|||
|
import qualified Network.Wai as WAI
|
|||
|
|
|||
|
-- Handler für den MyServiceBackend-Typen und Imports aus den Libraries
|
|||
|
import MyService.Handler as H -- handler der H.myApiEndpointV1Post implementiert
|
|||
|
import MyService.Types -- weitere Type (s. nächste box)
|
|||
|
import MyServiceGen.API as MS -- aus der generierten library
|
|||
|
|
|||
|
|
|||
|
myServicemain :: IO ()
|
|||
|
myServicemain = do
|
|||
|
-- .env-Datei ins Prozess-Environment laden, falls noch nicht von außen gesetzt
|
|||
|
void $ loadFile $ Dotenv.Config [".env"] [] False
|
|||
|
-- Config holen (defaults + overrides aus dem Environment)
|
|||
|
sc@ServerConfig{..} <- decodeWithDefaults defConfig
|
|||
|
-- Backend-Setup
|
|||
|
-- legt sowas wie Proxy-Server fest und wo man wie dran kommt. Benötigt für das Sprechen mit anderen Microservices
|
|||
|
let defaultHTTPSSettings = UseDefaultHTTPSSettings.tlsManagerSettings { managerResponseTimeout = responseTimeoutMicro $ 1000 * 1000 * myserviceMaxTimeout }
|
|||
|
createBackend url proxy = do
|
|||
|
manager <- newManager . managerSetProxy proxy
|
|||
|
$ defaultHTTPSSettings
|
|||
|
url' <- parseBaseUrl url
|
|||
|
return (mkClientEnv manager url')
|
|||
|
internalProxy = case myserviceInternalProxyUrl of
|
|||
|
"" -> noProxy
|
|||
|
url -> useProxy $ HTTP.Proxy (fromString url) myserviceInternalProxyPort
|
|||
|
-- externalProxy = case myserviceExternalProxyUrl of
|
|||
|
-- "" -> noProxy
|
|||
|
-- url -> useProxy $ HTTP.Proxy (fromString url) myserviceExternalProxyPort
|
|||
|
|
|||
|
-- Definieren & Erzeugen der Funktionen um die anderen Services anzusprechen.
|
|||
|
calls <- (,)
|
|||
|
<$> createBackend myserviceAUri internalProxy
|
|||
|
<*> createBackend myserviceBUri internalProxy
|
|||
|
|
|||
|
-- Logging-Setup
|
|||
|
hSetBuffering stdout LineBuffering
|
|||
|
hSetBuffering stderr LineBuffering
|
|||
|
|
|||
|
|
|||
|
-- Infos holen, brauchen wir später
|
|||
|
myName <- getHostName
|
|||
|
today <- formatTime defaultTimeLocale "%F" . utctDay <$> getCurrentTime
|
|||
|
|
|||
|
|
|||
|
-- activeMQ-Transaktional-Queue zum schreiben nachher vorbereiten
|
|||
|
amqPost <- newTQueueIO
|
|||
|
|
|||
|
|
|||
|
-- bracket a b c == erst a machen, ergebnis an c als variablen übergeben. Schmeisst c ne exception/wird gekillt/..., werden die variablen an b übergeben.
|
|||
|
bracket
|
|||
|
-- logfiles öffnen
|
|||
|
(LogFiles <$> openFile ("/logs/myservice-"<>myName<>"-"<>today<>".info") AppendMode
|
|||
|
<*> openFile (if myserviceDebug then "/logs/myservice-"<>myName<>"-"<>today<>".debug" else "/dev/null") AppendMode
|
|||
|
<*> openFile ("/logs/myservice-"<>myName<>"-"<>today<>".error") AppendMode
|
|||
|
<*> openFile ("/logs/myservice-"<>myName<>"-"<>today<>".timings") AppendMode
|
|||
|
)
|
|||
|
-- und bei exception/beendigung schlißen.h
|
|||
|
(\(LogFiles a b c d) -> mapM_ hClose [a,b,c,d])
|
|||
|
$ \logfiles -> do
|
|||
|
|
|||
|
|
|||
|
-- logschreibe-funktionen aliasen; log ist hier abstrakt, iolog spezialisiert auf io.
|
|||
|
let log = printLogFiles logfiles :: MonadIO m => [LogItem] -> m ()
|
|||
|
iolog = printLogFilesIO logfiles :: [LogItem] -> IO ()
|
|||
|
|
|||
|
|
|||
|
-- H.myApiEndpointV1Post ist ein Handler (alle Handler werden mit alias H importiert) und in einer eigenen Datei
|
|||
|
-- Per Default bekommen Handler sowas wie die server-config, die Funktionen um mit anderen Services zu reden, die AMQ-Queue um ins Kibana zu loggen und eine Datei-Logging-Funktion
|
|||
|
-- Man kann aber noch viel mehr machen - z.b. gecachte Daten übergeben, eine Talk-Instanz, etc. pp.
|
|||
|
server = MyServiceBackend{ myApiEndpointV1Post = H.myApiEndpointV1Post sc calls amqPost log
|
|||
|
}
|
|||
|
config = MS.Config $ "http://" ++ myserviceHost ++ ":" ++ show myservicePort ++ "/"
|
|||
|
iolog . pure . Info $ "Using Server configuration:"
|
|||
|
iolog . pure . Info $ pretty sc { myserviceActivemqPassword = "******" -- Do NOT log the password ;)
|
|||
|
, myserviceMongoPassword = "******"
|
|||
|
}
|
|||
|
-- alle Services starten (Hintergrund-Aktionen wie z.b. einen MongoDB-Dumper, einen Talk-Server oder wie hier die ActiveMQ
|
|||
|
void $ forkIO $ keepActiveMQConnected sc iolog amqPost
|
|||
|
-- logging-Framework erzeugen
|
|||
|
loggingMW <- loggingMiddleware
|
|||
|
-- server starten
|
|||
|
if myserviceDebug
|
|||
|
then runMyServiceMiddlewareServer config (cors (\_ -> Just (simpleCorsResourcePolicy {corsRequestHeaders = ["Content-Type"]})) . loggingMW . logStdout) server
|
|||
|
else runMyServiceMiddlewareServer config (cors (\_ -> Just (simpleCorsResourcePolicy {corsRequestHeaders = ["Content-Type"]}))) server
|
|||
|
|
|||
|
|
|||
|
-- Sollte bald in die Library hs-stomp ausgelagert werden
|
|||
|
-- ist ein Beispiel für einen ActiveMQ-Dumper
|
|||
|
keepActiveMQConnected :: ServerConfig -> ([LogItem] -> IO ()) -> TQueue BS.ByteString -> IO ()
|
|||
|
keepActiveMQConnected sc@ServerConfig{..} printLog var = do
|
|||
|
res <- handle (\(e :: SomeException) -> do
|
|||
|
printLog . pure . Error $ "Exception in AMQ-Thread: "<>show e
|
|||
|
return $ Right ()
|
|||
|
) $ AMQ.try $ do -- catches all AMQ-Exception that we can handle. All others bubble up.
|
|||
|
printLog . pure . Info $ "AMQ: connecting..."
|
|||
|
withConnection myserviceActivemqHost myserviceActivemqPort [ OAuth myserviceActivemqUsername myserviceActivemqPassword
|
|||
|
, OTmo (30*1000) {- 30 sec timeout -}
|
|||
|
]
|
|||
|
[] $ \c -> do
|
|||
|
let oconv = return
|
|||
|
printLog . pure . Info $ "AMQ: connected"
|
|||
|
withWriter c "Chaos-Logger for Kibana" "chaos.logs" [] [] oconv $ \writer -> do
|
|||
|
printLog . pure . Info $ "AMQ: queue created"
|
|||
|
let postfun = writeQ writer (Type (Application "json") []) []
|
|||
|
void $ race
|
|||
|
(forever $ atomically (readTQueue var) >>= postfun)
|
|||
|
(threadDelay (600*1000*1000)) -- wait 10 Minutes
|
|||
|
-- close writer
|
|||
|
-- close connection
|
|||
|
-- get outside of all try/handle/...-constructions befor recursing.
|
|||
|
case res of
|
|||
|
Left ex -> do
|
|||
|
printLog . pure . Error $ "AMQ: "<>show ex
|
|||
|
keepActiveMQConnected sc printLog var
|
|||
|
Right _ -> keepActiveMQConnected sc printLog var
|
|||
|
|
|||
|
|
|||
|
-- Beispiel für eine Custom-Logging-Middleware.
|
|||
|
-- Hier werden z.B. alle 4xx-Status-Codes inkl. Payload ins stdout-Log geschrieben.
|
|||
|
-- Nützlich, wenn die Kollegen ihre Requests nicht ordentlich schreiben können und der Server das Format zurecht mit einem BadRequest ablehnt ;)
|
|||
|
loggingMiddleware :: IO Middleware
|
|||
|
loggingMiddleware = liftIO $ mkRequestLogger $ def { outputFormat = CustomOutputFormatWithDetails out }
|
|||
|
where
|
|||
|
out :: ZonedDate -> WAI.Request -> Status -> Maybe Integer -> NominalDiffTime -> [BS.ByteString] -> Builder -> LogStr
|
|||
|
out _ r status _ _ payload _
|
|||
|
| statusCode status < 300 = ""
|
|||
|
| statusCode status > 399 && statusCode status < 500 = "Error code "<>toLogStr (statusCode status) <>" sent. Request-Payload was: "<> mconcat (toLogStr <$> payload) <> "\n"
|
|||
|
| otherwise = toLogStr (show r) <> "\n"
|
|||
|
</code></pre></div><h4 id='weitere-instanzen-und-definitionen-die-der-generator-noch-nicht-macht' class='mt-6 mb-2 text-2xl font-bold text-gray-700'>Weitere Instanzen und Definitionen, die der Generator (noch) nicht macht</h4>
|
|||
|
<p class='mb-3'>
|
|||
|
In der <code class='py-0.5 px-0.5 bg-gray-100'>Myservice.Types</code> werden ein paar hilfreiche Typen und Typinstanzen definiert. Im Folgenden geht es dabei um Dinge für:
|
|||
|
</p>
|
|||
|
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
Envy
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
Laden von $ENV_VAR in Datentypen
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Definitionen für Default-Settings
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
ServerConfig
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
Definition der Server-Konfiguration & Benennung der Environment-Variablen
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
ExtraTypes
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
ggf. Paketweite extra-Typen, die der Generator nicht macht, weil sie nicht aus der API kommen (z.B. cache)
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Out/BSON-Instanzen
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
Der API-Generator generiert nur wenige Instanzen automatisch (z.B. Aeson), daher werden hier die fehlenden definiert.
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
BSON: Kommunakation mit MongoDB
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Out: pretty-printing im Log
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='haskell language-haskell'>{-# OPTIONS_GHC -Wno-orphans #-}
|
|||
|
{-# OPTIONS_GHC -Wno-name-shadowing #-}
|
|||
|
{-# LANGUAGE DeriveAnyClass #-}
|
|||
|
{-# LANGUAGE DeriveFunctor #-}
|
|||
|
{-# LANGUAGE DeriveGeneric #-}
|
|||
|
{-# LANGUAGE DerivingVia #-}
|
|||
|
{-# LANGUAGE DuplicateRecordFields #-}
|
|||
|
{-# LANGUAGE FlexibleContexts #-}
|
|||
|
{-# LANGUAGE FlexibleInstances #-}
|
|||
|
{-# LANGUAGE GADTs #-}
|
|||
|
{-# LANGUAGE LambdaCase #-}
|
|||
|
{-# LANGUAGE MultiParamTypeClasses #-}
|
|||
|
{-# LANGUAGE OverloadedStrings #-}
|
|||
|
{-# LANGUAGE RankNTypes #-}
|
|||
|
{-# LANGUAGE RecordWildCards #-}
|
|||
|
module MyService.Types where
|
|||
|
|
|||
|
import Data.Aeson (FromJSON, ToJSON)
|
|||
|
import Data.Text
|
|||
|
import Data.Time.Clock
|
|||
|
import GHC.Generics
|
|||
|
import System.Envy
|
|||
|
import Text.PrettyPrint (text)
|
|||
|
import Text.PrettyPrint.GenericPretty
|
|||
|
|
|||
|
-- Out hat hierfür keine Instanzen, daher kurz eine einfach Definition.
|
|||
|
instance Out Text where
|
|||
|
doc = text . unpack
|
|||
|
docPrec i a = text $ showsPrec i a ""
|
|||
|
|
|||
|
instance Out UTCTime where
|
|||
|
doc = text . show
|
|||
|
docPrec i a = text $ showsPrec i a ""
|
|||
|
|
|||
|
-- Der ServerConfig-Typ. Wird mit den defaults unten initialisiert, dann mit den Variablen aus der .env-Datei überschrieben und zum Schluss können Serveradmins diese via $MYSERVICE_FOO nochmal überschreiben.
|
|||
|
data ServerConfig = ServerConfig
|
|||
|
{ myserviceHost :: String -- ^ Environment: $MYSERVICE_HOST
|
|||
|
, myservicePort :: Int -- ^ Environment: $MYSERVICE_PORT
|
|||
|
, myserviceMaxTimeout :: Int -- ^ Environment: $MYSERVICE_MAX_TIMEOUT
|
|||
|
, myserviceInternalProxyUrl :: String -- ^ Environment: $MYSERVICE_INTERNAL_PROXY_URL
|
|||
|
, myserviceInternalProxyPort :: Int -- ^ Environment: $MYSERVICE_INTERNAL_PROXY_PORT
|
|||
|
, myserviceExternalProxyUrl :: String -- ^ Environment: $MYSERVICE_EXTERNAL_PROXY_URL
|
|||
|
, myserviceExternalProxyPort :: Int -- ^ Environment: $MYSERVICE_EXTERNAL_PROXY_PORT
|
|||
|
, myserviceActivemqHost :: String -- ^ Environment: $MYSERVICE_ACTIVEMQ_HOST
|
|||
|
, myserviceActivemqPort :: Int -- ^ Environment: $MYSERVICE_ACTIVEMQ_PORT
|
|||
|
, myserviceActivemqUsername :: String -- ^ Environment: $MYSERVICE_ACTIVEMQ_USERNAME
|
|||
|
, myserviceActivemqPassword :: String -- ^ Environment: $MYSERVICE_ACTIVEMQ_PASSWORD
|
|||
|
, myserviceMongoUsername :: String -- ^ Environment: $MYSERVICE_MONGO_USERNAME
|
|||
|
, myserviceMongoPassword :: String -- ^ Environment: $MYSERVICE_MONGO_PASSWORD
|
|||
|
, myserviceDebug :: Bool -- ^ Environment: $MYSERVICE_DEBUG
|
|||
|
} deriving (Show, Eq, Generic)
|
|||
|
|
|||
|
-- Default-Konfigurations-Instanz für diesen Service.
|
|||
|
instance DefConfig ServerConfig where
|
|||
|
defConfig = ServerConfig "0.0.0.0" 8080 20
|
|||
|
""
|
|||
|
""
|
|||
|
""
|
|||
|
0
|
|||
|
""
|
|||
|
0
|
|||
|
""
|
|||
|
0
|
|||
|
""
|
|||
|
""
|
|||
|
""
|
|||
|
""
|
|||
|
False
|
|||
|
|
|||
|
-- Kann auch aus dem ENV gefüllt werden
|
|||
|
instance FromEnv ServerConfig
|
|||
|
-- Und hübsch ausgegeben werden.
|
|||
|
instance Out ServerConfig
|
|||
|
|
|||
|
|
|||
|
instance Out Response
|
|||
|
instance FromBSON Repsonse -- FromBSON-Instanz geht immer davon aus, dass alle keys da sind (ggf. mit null bei Nothing).</code></pre></div><h4 id='was-noch-zu-tun-ist' class='mt-6 mb-2 text-2xl font-bold text-gray-700'>Was noch zu tun ist</h4>
|
|||
|
<p class='mb-3'>
|
|||
|
Den Service implementieren. Einfach ein neues Modul aufmachen (z.B. <code class='py-0.5 px-0.5 bg-gray-100'>MyService.Handler</code> oder <code class='py-0.5 px-0.5 bg-gray-100'>MyService.DieserEndpunktbereich</code>/<code class='py-0.5 px-0.5 bg-gray-100'>MyService.JenerEndpunktbereich</code>) und dort die Funktion implementieren, die man in der <code class='py-0.5 px-0.5 bg-gray-100'>Main.hs</code> benutzt hat. In dem Handler habt ihr dann keinen Stress mehr mit validierung, networking, logging, etc. pp. weil alles in der Main abgehandelt wurde und ihr nur noch den “Happy-Case” implementieren müsst. Beispiel für unseren Handler oben:
|
|||
|
</p>
|
|||
|
<div class='py-0.5 mb-3 text-sm'><pre><code class='haskell language-haskell'>myApiEndpointV1Post :: MonadIO m => ServerConfig -> (ClientEnv,ClientEnv) -> TQueue BS.ByteString -> ([LogItem] -> IO ()) -> Request -> m Response
|
|||
|
myApiEndpointV1Post sc calls amqPost log req = do
|
|||
|
liftIO . log $ [Info $ "recieved "<>pretty req] -- input-logging
|
|||
|
liftIO . atomically . writeTQueue . LBS.toStrict $ "{\"hey Kibana, i recieved:\"" <> A.encode (pretty req) <> "}" -- log in activeMQ/Kibana
|
|||
|
|
|||
|
|
|||
|
--- .... gaaaanz viel komplizierter code um die Response zu erhalten ;)
|
|||
|
let ret = Response 1337 Nothing -- dummy-response ;)
|
|||
|
-- gegeben wir haben eine gültige mongodb-pipe;
|
|||
|
-- mehr logik will ich in die Beispiele nicht packen.
|
|||
|
-- Man kann die z.b. als weiteren Wert in einer TMVar (damit man sie ändern & updaten kann) an die Funktion übergeben.
|
|||
|
liftIO . access pipe master "DatabaseName" $ do
|
|||
|
ifM (auth (myServiceMongoUsername sc) (myServiceMongoPassword sc)) (return ()) (liftIO . printLog . pure . Error $ "MongoDB: Login failed.")
|
|||
|
save "DatabaseCollection" ["_id" =: 1337, "entry" =: ret] -- selbe id wie oben ;)
|
|||
|
return ret</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
Diese dummy-Antwort führt auf, wie gut man die ganzen Sachen mischen kann.
|
|||
|
</p>
|
|||
|
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
Logging in die Dateien/stdout nach config
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Logging von Statistiker in Kibana
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Speichern der Antwort in der MongoDB
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Generieren einer Serverantwort und ausliefern dieser über die Schnittstelle
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
<h4 id='tipps--tricks' class='mt-6 mb-2 text-2xl font-bold text-gray-700'>Tipps & Tricks</h4><h5 id='dateien-die-statisch-ausgeliefert-werden-sollen' class='mt-6 mb-2 text-xl font-bold text-gray-700'>Dateien, die statisch ausgeliefert werden sollen</h5>
|
|||
|
<p class='mb-3'>
|
|||
|
Hierzu erstellt man ein Verzeichnis <code class='py-0.5 px-0.5 bg-gray-100'>static/</code> (konvention; ist im generator so generiert, dass das ausgeliefert wird). Packt man hier z.b. eine <code class='py-0.5 px-0.5 bg-gray-100'>index.html</code> rein, erscheint die, wenn man den Service ansurft.
|
|||
|
</p>
|
|||
|
<h5 id='wie-bekomme-ich-diese-fancy-preview-hin' class='mt-6 mb-2 text-xl font-bold text-gray-700'>Wie bekomme ich diese fancy Preview hin?</h5>
|
|||
|
<p class='mb-3'>
|
|||
|
Der Editor, der ganz am Anfang zum Einsatz gekommen ist, braucht nur die <code class='py-0.5 px-0.5 bg-gray-100'>api-doc.yml</code> um diese Ansicht zu erzeugen. Daher empfielt sich hier ein angepasster Fork davon indem die Pfade in der index.html korrigiert sind. Am einfachsten (und von den meisten services so benutzt): In meiner Implementation liegt dann nach dem starten auf http://localhost:PORT/ui/ und kann direkt dort getestet werden.
|
|||
|
</p>
|
|||
|
<h5 id='wie-sorge-ich-für-bessere-warnungen-damit-der-compiler-meine-bugs-fängt' class='mt-6 mb-2 text-xl font-bold text-gray-700'>Wie sorge ich für bessere Warnungen, damit der Compiler meine Bugs fängt?</h5><div class='py-0.5 mb-3 text-sm'><pre><code class='bash language-bash'>stack build --file-watch --ghc-options '-freverse-errors -W -Wall -Wcompat' --interleaved-output</code></pre></div>
|
|||
|
<p class='mb-3'>
|
|||
|
Was tut das?
|
|||
|
</p>
|
|||
|
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
<code class='py-0.5 px-0.5 bg-gray-100'>--file-watch</code>: automatisches (minimales) kompilieren bei dateiänderungen
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
<code class='py-0.5 px-0.5 bg-gray-100'>--ghc-options</code>
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
<code class='py-0.5 px-0.5 bg-gray-100'>-freverse-errors</code>: Fehlermeldungen in umgekehrter Reihenfolge (Erster Fehler ganz unten; wenig scrollen )
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
<code class='py-0.5 px-0.5 bg-gray-100'>-W</code>: Warnungen an
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
<code class='py-0.5 px-0.5 bg-gray-100'>-Wall</code>: Alle sinnvollen Warnungen an (im gegensatz zu <code class='py-0.5 px-0.5 bg-gray-100'>-Weverything</code>, was WIRKLICH alles ist )
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
<code class='py-0.5 px-0.5 bg-gray-100'>-Wcompat</code>: Warnungen für Sachen, die in der nächsten Compilerversion kaputt brechen werden & vermieden werden sollten
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
<code class='py-0.5 px-0.5 bg-gray-100'>--interleaved-output</code>: stack-log direkt ausgeben & nicht in dateien schreiben und die dann am ende zusammen cat'en.
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Um pro Datei Warnungen auszuschalten (z.B. weil man ganz sicher weiss, was man tut -.-): <code class='py-0.5 px-0.5 bg-gray-100'>{-# OPTIONS_GHC -Wno-whatsoever #-}</code> als Pragma in die Datei.
|
|||
|
</p>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
<strong>Idealerweise sollte das Projekt keine Warnungen erzeugen.</strong>
|
|||
|
</p>
|
|||
|
<h3 id='deployment' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>Deployment</h3>
|
|||
|
<p class='mb-3'>
|
|||
|
Als Beispiel sei hier ein einfaches Docker-Build mit Jenkins-CI gezeigt, weil ich das aus Gründen rumliegen hatte. Kann man analog in fast alle anderen CI übrsetzen.
|
|||
|
</p>
|
|||
|
<h4 id='docker' class='mt-6 mb-2 text-2xl font-bold text-gray-700'>Docker</h4>
|
|||
|
<p class='mb-3'>
|
|||
|
Die angehängten Scripte gehen von einer Standard-Einrichtung aus (statische sachen in static, 2-3 händische Anpassungen auf das eigene Projekt nach auspacken). Nachher liegt dann auch unter static/version die gebaute Versionsnummer & kann abgerufen werden. In der Dockerfile.release und der Jenkinsfile müssen noch anpassungen gemacht werden. Konkret:
|
|||
|
</p>
|
|||
|
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
in der Dockerfile.release: alle <code class='py-0.5 px-0.5 bg-gray-100'><<<HIER>>></code>-Stellen sinnvoll befüllen
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
in der Jenkinsfile die defs für “servicename” und “servicebinary” ausfüllen. Binary ist das, was bei stack exec aufgerufen wird; name ist der Image-Name für das docker-repository.
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
<h4 id='jenkins' class='mt-6 mb-2 text-2xl font-bold text-gray-700'>Jenkins</h4>
|
|||
|
<p class='mb-3'>
|
|||
|
Änderungen die dann noch gemacht werden müssen:
|
|||
|
</p>
|
|||
|
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-disc'>
|
|||
|
|
|||
|
<li>
|
|||
|
git-repository url anpassen
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Environment-Vars anpasses ($BRANCH = test & live haben keine zusatzdinger im docker-image-repository; ansonsten hat das image $BRANCH im namen)
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
<p class='mb-3'>
|
|||
|
Wenn das durchgebaut ist, liegt im test/live-repository ein docker-image namens <code class='py-0.5 px-0.5 bg-gray-100'>servicename:version</code>.
|
|||
|
</p>
|
|||
|
<h3 id='omg-ich-muss-meine-api-ändern-was-mache-ich-nun' class='mt-6 mb-2 text-3xl font-bold text-gray-700'>OMG! Ich muss meine API ändern. Was mache ich nun?</h3>
|
|||
|
<ul class='my-3 ml-6 space-y-1 list-decimal list-inside'>
|
|||
|
|
|||
|
<li>
|
|||
|
api-doc.yml bearbeiten, wie gewünscht
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
mittels generator die Api & submodule neu generieren
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
ggf. custom Änderungen übernehmen (:Gitdiffsplit hilft)
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
Alle Compilerfehler + Warnungen in der eigentlichen Applikation fixen
|
|||
|
</li>
|
|||
|
|
|||
|
<li>
|
|||
|
If it comipilez, ship it! (Besser nicht ;) )
|
|||
|
</li>
|
|||
|
|
|||
|
</ul>
|
|||
|
|
|||
|
<!-- div class="flex items-center justify-center mt-2">
|
|||
|
<ema:metadata>
|
|||
|
<with var="template">
|
|||
|
<a class="text-gray-300 hover:text-${theme}-600 text-sm" title="Edit this page on GitHub"
|
|||
|
href="${value:editBaseUrl}/${ema:note:source-path}">
|
|||
|
<svg xmlns="http://www.w3.org/2000/svg" class="h-6 w-6" fill="none" viewBox="0 0 24 24" stroke="currentColor">
|
|||
|
<path stroke-linecap="round" stroke-linejoin="round" stroke-width="2"
|
|||
|
d="M11 5H6a2 2 0 00-2 2v11a2 2 0 002 2h11a2 2 0 002-2v-5m-1.414-9.414a2 2 0 112.828 2.828L11.828 15H9v-2.828l8.586-8.586z" />
|
|||
|
</svg>
|
|||
|
</a>
|
|||
|
</with>
|
|||
|
</ema:metadata>
|
|||
|
</div -->
|
|||
|
</article>
|
|||
|
<div class='flex flex-col lg:flex-row lg:space-x-2'>
|
|||
|
|
|||
|
|
|||
|
</div>
|
|||
|
|
|||
|
<section class='flex flex-wrap items-end justify-center my-4 space-x-2 space-y-2 font-mono text-sm'>
|
|||
|
|
|||
|
</section>
|
|||
|
|
|||
|
<!-- What goes in this file will at the very end of the main div -->
|
|||
|
</main>
|
|||
|
</div>
|
|||
|
</div>
|
|||
|
<footer class='flex items-center justify-center mt-2 mb-8 space-x-4 text-center text-gray-800'>
|
|||
|
|
|||
|
<div>
|
|||
|
<a href='' title='Go to Home page'>
|
|||
|
<svg xmlns='http://www.w3.org/2000/svg' class='w-6 h-6 hover:text-red-700' fill='none' viewBox='0 0 24 24' stroke='currentColor'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M3 12l2-2m0 0l7-7 7 7M5 10v10a1 1 0 001 1h3m10-11l2 2m-2-2v10a1 1 0 01-1 1h-3m-6 0a1 1 0 001-1v-4a1 1 0 011-1h2a1 1 0 011 1v4a1 1 0 001 1m-6 0h6'></path>
|
|||
|
</svg>
|
|||
|
</a>
|
|||
|
</div>
|
|||
|
<div>
|
|||
|
<a href='-/all' title='View Index'>
|
|||
|
<svg class='w-6 h-6 hover:text-red-700' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M4 8V4m0 0h4M4 4l5 5m11-1V4m0 0h-4m4 0l-5 5M4 16v4m0 0h4m-4 0l5-5m11 5l-5-5m5 5v-4m0 4h-4'>
|
|||
|
</path>
|
|||
|
</svg>
|
|||
|
</a>
|
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|
</div>
|
|||
|
<div>
|
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|
<a href='https://emanote.srid.ca' target='_blank' title='Generated by Emanote 0.7.3.0'>
|
|||
|
<img class='w-6 h-6 hover:text-red-700' src='_emanote-static/emanote-logo.svg' />
|
|||
|
</a>
|
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|
</div>
|
|||
|
<div>
|
|||
|
<a href='-/tags' title='View tags'>
|
|||
|
<svg class='w-6 h-6 hover:text-red-700' fill='none' stroke='currentColor' viewBox='0 0 24 24' xmlns='http://www.w3.org/2000/svg'>
|
|||
|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M7 7h.01M7 3h5c.512 0 1.024.195 1.414.586l7 7a2 2 0 010 2.828l-7 7a2 2 0 01-2.828 0l-7-7A1.994 1.994 0 013 12V7a4 4 0 014-4z'>
|
|||
|
</path>
|
|||
|
</svg>
|
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|
</a>
|
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|
</div>
|
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|
<div>
|
|||
|
<a href='-/tasks' title='View tasks'>
|
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|
<svg xmlns='http://www.w3.org/2000/svg' class='w-6 h-6 hover:text-red-700' fill='none' viewBox='0 0 24 24' stroke='currentColor'>
|
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|
<path stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M9 12l2 2 4-4m6 2a9 9 0 11-18 0 9 9 0 0118 0z'></path>
|
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|
</svg>
|
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|
</a>
|
|||
|
</div>
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|
</footer>
|
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|
</div>
|
|||
|
|
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|
<div id='stork-search-container' class='hidden fixed w-screen h-screen inset-0 backdrop-filter backdrop-blur-sm'>
|
|||
|
<div class='fixed w-screen h-screen inset-0' onclick='window.emanote.stork.toggleSearch()'></div>
|
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|
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|||
|
<div class='container mx-auto p-10 mt-10'>
|
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|
<div class='stork-wrapper-flat container mx-auto'>
|
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|
<input id='stork-search-input' data-stork='emanote-search' class='stork-input' placeholder='Search (Ctrl+K) ...' />
|
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|
<div data-stork='emanote-search-output' class='stork-output'></div>
|
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|
</div>
|
|||
|
</div>
|
|||
|
</div>
|
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|
</body>
|
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|
|
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|
</html>
|