{"id":87208,"date":"2020-07-05T13:42:19","date_gmt":"2020-07-05T11:42:19","guid":{"rendered":"https:\/\/prohoster.info\/blog\/administrirovanie\/sentry-udalennyj-monitoring-bagov-v-frontend-prilozheniyah-react"},"modified":"2020-07-05T13:42:19","modified_gmt":"2020-07-05T11:42:19","slug":"sentry-udalennyj-monitoring-bagov-v-frontend-prilozheniyah-react","status":"publish","type":"post","link":"https:\/\/prohoster.info\/nl\/blog\/administrirovanie\/sentry-udalennyj-monitoring-bagov-v-frontend-prilozheniyah-react","title":{"rendered":"Sentry afstandsmonitoring van bugs in frontend React-applicaties","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>We onderzoeken het gebruik van Sentry met React.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/6ea51ae73accae0c36e0130b830c1ca2.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Dit artikel maakt deel uit van een serie die begint met een foutmelding in Sentry aan de hand van een voorbeeld: <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/508686\/\">Deel 1<\/a><\/noindex>. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p><strong>Implementatie van React<\/strong> <\/p>\n<p><\/p>\n<p>Eerst moeten we een nieuw Sentry-project toevoegen voor deze applicatie; vanaf de Sentry-website. In dit geval kiezen we voor React.<\/p>\n<p><\/p>\n<p>We implementeren opnieuw onze twee knoppen, Hello en Error, in de React-app. We beginnen met het maken van onze startapplicatie:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">npx create-react-app react-app<\/code><\/pre>\n<p><\/p>\n<p>Daarna importeren we het Sentry-pakket:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">yarn add @sentry\/browser<\/code><\/pre>\n<p><\/p>\n<p>en initialiseren we het:<\/p>\n<p><\/p>\n<p>react-app \/ src \/ index.js<\/p>\n<p><\/p>\n<pre><code class=\"javascript\">...\nimport * as Sentry from '@sentry\/browser';\n\nconst RELEASE = '0.1.0';\nif (process.env.NODE_ENV === 'production') {\n  Sentry.init({\n    dsn: 'https:\/\/303c04eac89844b5bfc908ceffc6757c@sentry.io\/1289887',\n    release: RELEASE,\n  });\n}\n...<\/code><\/pre>\n<p><\/p>\n<p>Observaties:<\/p>\n<p><\/p>\n<ul>\n<li>Tijdens de ontwikkeling hebben we andere mechanismen voor het observeren van problemen, zoals de console, dus we schakelen Sentry alleen in voor productie-uitvoeringen.<\/li>\n<\/ul>\n<p><\/p>\n<p>Daarna implementeren we onze knoppen Hello en Error en voegen ze toe aan de app:<\/p>\n<p><\/p>\n<p><em>react-app \/ src \/ Hello.js<\/em><\/p>\n<p><\/p>\n<pre><code class=\"javascript\">import React, { Component } from &#039;react&#039;;\nimport * as Sentry from &#039;@sentry\/browser&#039;;\n\nexport default class Hello extends Component {\n  state = {\n    text: &#039;&#039;,\n  };\n  render() {\n    const { text } = this.state;\n    return (\n      &lt;div&gt;\n        &lt;button\n          onclick=&quot;{this.handleClick}&quot;\n        &gt;\n          Hallo\n        &lt;\/button&gt;\n        &lt;div&gt;{text}&lt;\/div&gt;\n      &lt;\/div&gt;\n    )\n  }\n\n  handleClick = () =&amp;gt; {\n    this.setState({\n      text: &#039;Hallo Wereld&#039;,\n    });\n    try {\n      throw new Error(&#039;Vang&#039;);\n    } catch (err) {\n      if (process.env.NODE_ENV !== &#039;production&#039;) {\n        return;\n      }\n      Sentry.captureException(err);\n    }\n  }\n}<\/code><\/pre>\n<p><\/p>\n<p><em>react-app \/ src \/ MyError.js<\/em><\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">import React, { Component } from &#039;react&#039;;\n\nexport default class MyError extends Component {\n  render() {\n    return (\n      &lt;div&gt;\n        &lt;button\n          onclick=&quot;{this.handleClick}&quot;\n        &gt;\n          Fout\n        &lt;\/button&gt;\n      &lt;\/div&gt;\n    )\n  }\n\n  handleClick = () =&amp;gt; {\n    throw new Error(&#039;Uncaught&#039;);\n  }\n}<\/code><\/pre>\n<p><\/p>\n<p><em>react-app \/ src \/ App.js<\/em><\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">... import Hello from &#039;.\/Hello&#039;; import MyError from &#039;.\/MyError&#039;; class App extends Component { render() { return (\n      &lt;div classname=&quot;App&quot;&gt;\n        ...\n        &lt;hello \/&gt;\n        &lt;myerror \/&gt;\n      &lt;\/div&gt;\n    ); } } export default App;<\/code><\/pre>\n<p><\/p>\n<p><strong>Probleem (Bronkaarten)<\/strong><\/p>\n<p><\/p>\n<p>We kunnen Sentry testen met een productie-uitvoering door het volgende in te voeren:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">yarn build<\/code><\/pre>\n<p><\/p>\n<p>en in de build-map voeren we in:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">npx http-server -c-1<\/code><\/pre>\n<p><\/p>\n<p>Het probleem dat we direct tegenkomen, is dat de foutmeldingen van Sentry verwijzen naar regelnummers in het verkleinde pakket; niet erg handig.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/e5b320f731249bad65a82e33c4e09b43.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>De service Sentry legt dit uit door de bron kaarten voor het verkleinde pakket op te halen nadat een fout is opgetreden. In dit geval lopen we van localhost (niet bereikbaar voor de Sentry-service).<\/p>\n<p><\/p>\n<p><strong>Oplossingen (Bronkaarten)<\/strong><\/p>\n<p><\/p>\n<p>Het oplossen van dit probleem komt neer op het draaien van de applicatie vanaf een openbare webserver. Een eenvoudige oplossing is om de GitHub Pages-service (gratis) te gebruiken. De stappen om dit meestal te doen zijn als volgt:<\/p>\n<p><\/p>\n<ol>\n<li>\n<p>Kopieer de inhoud van de map <em>build<\/em> kopi\u00ebren naar de map <em>docs<\/em> in de hoofdmap van de repository.<\/p>\n<p>\n<\/li>\n<li>\n<p>Schakel <em>GitHub Pages<\/em> in de repository (vanuit GitHub) in om de docs-map te gebruiken in <em>master<\/em> de tak<\/p>\n<p>\n<\/li>\n<li>\n<p>Verplaats de wijzigingen naar GitHub<\/p>\n<p>\n<\/li>\n<\/ol>\n<p><\/p>\n<p><strong>Opmerking<\/strong>: nadat ik begrijp dat ik de <em>create-create-app<\/em> homepage-functie moest gebruiken om de applicatie te draaien. Dit kwam neer op het toevoegen van het volgende aan package.json:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">\"homepage\": \"https:\/\/larkintuckerllc.github.io\/hello-sentry\/\"<\/code><\/pre>\n<p><\/p>\n<p>De definitieve versie van de draaiende applicatie is beschikbaar op:<\/p>\n<p><\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/larkintuckerllc.github.io\/hello-sentry\/\">https:\/\/larkintuckerllc.github.io\/hello-sentry\/<\/a><\/noindex><\/p>\n<p><\/p>\n<p><strong>Illustratie van gevangen fouten<\/strong><\/p>\n<p><\/p>\n<p>Laten we het proces doorlopen bij het drukken op de Hello-knop.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/1dbe7845b2e3d04933344d3d18dac01f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Met de fout die als volgt verschijnt:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/621f0f12eb77b7dd413d168c35c141d4.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Observaties:<\/p>\n<p><\/p>\n<ul>\n<li>Dit foutrapport kan niet duidelijker zijn, <strong>BRAVO<\/strong>.<\/li>\n<\/ul>\n<p><\/p>\n<p><strong>Illustratie van niet-gevangen fouten<\/strong><\/p>\n<p><\/p>\n<p>Evenzo, laten we het proces doorlopen bij het drukken op de knop <em>Fout<\/em>.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/65c07bc6db9f6b577ecb79dfd3336b38.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Met de fout die als volgt verschijnt:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/f4d668075885bb66ce0158588bff038c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><strong>De beste behandeling van niet-gehandleerde fouten (rendering)<\/strong><\/p>\n<p><\/p>\n<blockquote><p>Inleiding tot foutgrenzen<\/p>\n<p>Een JavaScript-fout in het gedeelte van de gebruikersinterface mag de werking van de hele applicatie niet verstoren. Om dit probleem voor React-gebruikers op te lossen, introduceert React 16 het nieuwe concept \"foutgrenzen\".<\/p>\n<p>Foutgrenzen zijn React-componenten die JavaScript-fouten opvangen waar dan ook in hun kindcomponenten, deze fouten registreren en een reservegebruikersinterface weergeven in plaats van de gebroken componentenboom. Foutgrenzen vangen fouten op tijdens het renderen, in levenscyclusmethoden en in constructeurs van de hele boom onder hen.<\/p>\n<p>\u2026<\/p>\n<p>Nieuw gedrag voor niet-opgevangen fouten<\/p>\n<p>Deze wijziging is van cruciaal belang. Vanaf React 16 zullen fouten die door geen enkele foutgrens zijn opgevangen, leiden tot het demonteren van de hele React-componentenboom.<\/p>\n<p>\u2014 <em>Dan Abramov \u2014<\/em> <noindex><a rel=\"nofollow\" href=\"https:\/\/reactjs.org\/blog\/2017\/07\/26\/error-handling-in-react-16.html\"><em>Foutafhandeling in React 16<\/em><\/a><\/noindex><\/p><\/blockquote>\n<p>Een belangrijke nuance die enige tijd kostte voordat ik het begreep, is dat <strong>het hierboven beschreven gedrag alleen werkt met fouten die worden gegenereerd in de render-methode (of, waarschijnlijker, in een van de levenscyclusmethoden)<\/strong>. Bijvoorbeeld, het gebruik van foutgrenzen zou ons geen voordelen hebben opgeleverd met onze knop <em>Fout<\/em>; deze fout zat in de klikhandler.<\/p>\n<p><\/p>\n<p>Laten we een voorbeeld van een renderfout maken, en daarna foutgrenzen gebruiken voor een elegantere foutafhandeling.<\/p>\n<p><\/p>\n<p><em>react-app \/ src \/ MyRenderError<\/em><\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">import React, { Component } from &#039;react&#039;;\n\nexport default class MyRenderError extends Component {\n  state = {\n    flag: false,\n  };\n  render() {\n    const { flag } = this.state;\n    return (\n      &lt;div&gt;\n        &lt;button\n          onclick=&quot;{this.handleClick}&quot;\n        &gt;\n          Render Fout\n        &lt;\/button&gt;\n        { flag &amp;amp;&amp;amp; &lt;div&gt;{flag.busted.bogus}&lt;\/div&gt; }\n      &lt;\/div&gt;\n    )\n  }\n\n  handleClick = () =&amp;gt; {\n    this.setState({\n      flag: true,\n    });\n  }\n}<\/code><\/pre>\n<p><\/p>\n<p>Opmerking:<\/p>\n<p><\/p>\n<ul>\n<li>\n<p>Bij het klikken op de knop, <em>React<\/em> dezelfde indicatie van een beveiligde verbinding worden weergegeven als voor certificaten met domeinverificatie. <em>flag.busted.bogus<\/em>, die een fout genereert<\/p>\n<p>\n<\/li>\n<li>\n<p>Zonder een foutgrens zal de hele componentenboom worden gedemonteerd.<\/p>\n<p>\n<\/li>\n<\/ul>\n<p><\/p>\n<p>Dan schrijven we onze foutgrenscode (maakt gebruik van de nieuwe levenscyclusmethode <em>componentDidCatch<\/em>); dit is in wezen een voorbeeld dat in het artikel van Dan Abramov wordt gegeven:<\/p>\n<p><\/p>\n<p><em>react-app \/ src \/ ErrorBoundary.js<\/em><\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">import React, { Component } from &#039;react&#039;;\nimport * as Sentry from &#039;@sentry\/browser&#039;;\n\nexport default class ErrorBoundary extends Component {\n  constructor(props) {\n    super(props);\n    this.state = { hasError: false };\n  }\n\n  componentDidCatch(err, info) {\n    this.setState({ hasError: true });\n    Sentry.captureException(err);\n  }\n\n  render() {\n    if (this.state.hasError) {\n      return &lt;h1&gt;Er is iets misgegaan.&lt;\/h1&gt;;\n    }\n    return this.props.children;\n  }\n}<\/code><\/pre>\n<p><\/p>\n<p>Ten slotte gebruiken we deze component:<\/p>\n<p><\/p>\n<p><em>react-app \/ src \/ App.js<\/em><\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">...\nimport MyRenderError from &#039;.\/MyRenderError&#039;;\n\nclass App extends Component {\n  render() {\n    return (\n      &lt;errorboundary&gt;\n        &lt;div classname=&quot;App&quot;&gt;\n          ...\n        &lt;\/div&gt;\n      &lt;\/errorboundary&gt;\n    );\n  }\n}\n...<\/code><\/pre>\n<p><\/p>\n<p>Hierdoor zal het klikken op de knop Render Error de reservegebruikersinterface weergeven en een fout melden aan Sentry.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/e410ee6355f5d423281fe278b638a09d.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry afstandsmonitoring van bugs in frontend React-applicaties\" src=\"\/wp-content\/uploads\/2020\/07\/58183f6f6aef124e8d14acaaf7e0d4fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><strong>Afsluiting<\/strong><\/p>\n<p><\/p>\n<p>Ik hoop dat je dit nuttig vond.<\/p>\n<p><\/p>\n<p>P.S. <noindex><a rel=\"nofollow\" href=\"https:\/\/medium.com\/@johntucker_48673\/sentry-error-reporting-by-example-part-2-cd7b2f653be4\">Link naar origineel<\/a><\/noindex> <\/p>\n<p><\/p>\n<p>P.S. Telegram-chat over Sentry <noindex><a rel=\"nofollow\" href=\"https:\/\/t.me\/sentry_ru\">https:\/\/t.me\/sentry_ru<\/a><\/noindex><\/p>\n<p>Bron: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/509362\/\">habr.com<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041c\u044b \u0438\u0437\u0443\u0447\u0430\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 Sentry \u0441 React. \u042d\u0442\u0430 \u0441\u0442\u0430\u0442\u044c\u044f \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0447\u0430\u0441\u0442\u044c\u044e \u0441\u0435\u0440\u0438\u0438, \u043d\u0430\u0447\u0438\u043d\u0430\u044e\u0449\u0435\u0439\u0441\u044f \u0441 \u0441\u043e\u043e\u0431\u0449\u0435\u043d\u0438\u044f \u043e\u0431 \u043e\u0448\u0438\u0431\u043a\u0430\u0445 Sentry \u043d\u0430 \u043f\u0440\u0438\u043c\u0435\u0440\u0435: \u0427\u0430\u0441\u0442\u044c 1. \u0420\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f React \u0421\u043d\u0430\u0447\u0430\u043b\u0430 \u043d\u0430\u043c \u043d\u0443\u0436\u043d\u043e \u0434\u043e\u0431\u0430\u0432\u0438\u0442\u044c \u043d\u043e\u0432\u044b\u0439 \u043f\u0440\u043e\u0435\u043a\u0442 Sentry \u0434\u043b\u044f \u044d\u0442\u043e\u0433\u043e \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u044f; \u0441 \u0441\u0430\u0439\u0442\u0430 Sentry. \u0412 \u044d\u0442\u043e\u043c \u0441\u043b\u0443\u0447\u0430\u0435 \u043c\u044b \u0432\u044b\u0431\u0438\u0440\u0430\u0435\u043c React. \u041c\u044b \u0432\u043d\u043e\u0432\u044c \u0440\u0435\u0430\u043b\u0438\u0437\u0443\u0435\u043c \u043d\u0430\u0448\u0438 \u0434\u0432\u0435 \u043a\u043d\u043e\u043f\u043a\u0438, Hello \u0438 Error, \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435 \u0441 React. \u041c\u044b [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":87209,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-87208","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041c\u044b \u0438\u0437\u0443\u0447\u0430\u0435\u043c \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0435 Sentry \u0441 React.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/nl\/blog\/administrirovanie\/sentry-udalennyj-monitoring-bagov-v-frontend-prilozheniyah-react\" \/>\n\t\t<meta 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