{"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\/da\/blog\/administrirovanie\/sentry-udalennyj-monitoring-bagov-v-frontend-prilozheniyah-react","title":{"rendered":"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Vi unders\u00f8ger brugen af Sentry med React.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" src=\"\/wp-content\/uploads\/2020\/07\/6ea51ae73accae0c36e0130b830c1ca2.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Denne artikel er en del af en serie, der starter med fejlrapportering i Sentry som eksempel: <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/508686\/\">Del 1<\/a><\/noindex>. <\/p>\n<p><noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><\/p>\n<p><strong>Implementering af React<\/strong> <\/p>\n<p><\/p>\n<p>F\u00f8rst skal vi tilf\u00f8je et nyt Sentry-projekt til denne applikation fra Sentrys hjemmeside. I dette tilf\u00e6lde v\u00e6lger vi React.<\/p>\n<p><\/p>\n<p>Vi implementerer igen vores to knapper, Hello og Error, i applikationen med React. Vi starter med at bygge vores startapplikation:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">npx create-react-app react-app<\/code><\/pre>\n<p><\/p>\n<p>Derefter importerer vi Sentry-pakken:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">yarn add @sentry\/browser<\/code><\/pre>\n<p><\/p>\n<p>og initialiserer den:<\/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>Observationer:<\/p>\n<p><\/p>\n<ul>\n<li>Under udvikling har vi andre mekanismer til at overv\u00e5ge problemer, s\u00e5som konsollen, s\u00e5 vi aktiverer kun Sentry for produktionsbygger.<\/li>\n<\/ul>\n<p><\/p>\n<p>Derefter implementerer vi vores knapper Hello og Error og tilf\u00f8jer dem til applikationen:<\/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          Hej\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;Hello World&#039;,\n    });\n    try {\n      throw new Error(&#039;Caught&#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          Fejl\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\">...\nimport Hello from &#039;.\\\/Hello&#039;;\nimport MyError from &#039;.\\\/MyError&#039;;\n\nclass App extends Component {\n  render() {\n    return (\n      &lt;div classname=&quot;App&quot;&gt;\n        ...\n        &lt;hello \/&gt;\n        &lt;myerror \/&gt;\n      &lt;\/div&gt;\n    );\n  }\n}\n\nexport default App;<\/code><\/pre>\n<p><\/p>\n<p><strong>Problematik (Kildekort)<\/strong><\/p>\n<p><\/p>\n<p>Vi kan teste Sentry med en produktionsbygning ved at indtaste:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">yarn build<\/code><\/pre>\n<p><\/p>\n<p>og fra build-mappen indtaste:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">npx http-server -c-1<\/code><\/pre>\n<p><\/p>\n<p>Problemet, vi straks vil st\u00f8de p\u00e5, er, at Sentry-fejlrapporter henviser til linjenumre i den minimerede pakke; ikke s\u00e5 nyttigt.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" src=\"\/wp-content\/uploads\/2020\/07\/e5b320f731249bad65a82e33c4e09b43.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Sentry-tjenesten forklarer dette ved at tr\u00e6kke kildekortene for den minimerede pakke efter modtagelse af en fejl. I dette tilf\u00e6lde k\u00f8rer vi fra localhost (utilg\u00e6ngelig for Sentry).<\/p>\n<p><\/p>\n<p><strong>L\u00f8sninger (Kildekort)<\/strong><\/p>\n<p><\/p>\n<p>At l\u00f8se dette problem kr\u00e6ver, at applikationen k\u00f8rer fra en offentlig webserver. En simpel reaktion p\u00e5 dette er at bruge GitHub Pages-tjenesten (gratis). Trinene for at bruge det er normalt som f\u00f8lger:<\/p>\n<p><\/p>\n<ol>\n<li>\n<p>Kopier indholdet af mappen <em>build<\/em> til mappen <em>docs<\/em> i roden af repository.<\/p>\n<p>\n<\/li>\n<li>\n<p>Aktiver <em>GitHub Pages<\/em> i repository (fra GitHub) for at bruge docs-mappen i <em>master<\/em> grenen.<\/p>\n<p>\n<\/li>\n<li>\n<p>Overf\u00f8r \u00e6ndringer til GitHub<\/p>\n<p>\n<\/li>\n<\/ol>\n<p><\/p>\n<p><strong>Bem\u00e6rk<\/strong>: efter at jeg inds\u00e5, at jeg skulle bruge <em>create-create-app<\/em> homepage-funktionen til at k\u00f8re applikationen. Det handlede om at tilf\u00f8je f\u00f8lgende til package.json:<\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">\"hjemmeside\": \"https:\/\/larkintuckerllc.github.io\/hello-sentry\/\"<\/code><\/pre>\n<p><\/p>\n<p>Den endelige version af den k\u00f8rende applikation er tilg\u00e6ngelig p\u00e5:<\/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>Illustration af Fangede Fejl<\/strong><\/p>\n<p><\/p>\n<p>Lad os gennemg\u00e5 et klik p\u00e5 knappen Hello.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" src=\"\/wp-content\/uploads\/2020\/07\/1dbe7845b2e3d04933344d3d18dac01f.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Med en fejl, der fremst\u00e5r som f\u00f8lger:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" src=\"\/wp-content\/uploads\/2020\/07\/621f0f12eb77b7dd413d168c35c141d4.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Observationer:<\/p>\n<p><\/p>\n<ul>\n<li>Denne fejlrapport kan ikke v\u00e6re klarere, <strong>BRAVO<\/strong>.<\/li>\n<\/ul>\n<p><\/p>\n<p><strong>Illustration af Uovervejede Fejl<\/strong><\/p>\n<p><\/p>\n<p>Tilsvarende, lad os gennemg\u00e5 et klik p\u00e5 knappen. <em>Fejl<\/em>.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" src=\"\/wp-content\/uploads\/2020\/07\/65c07bc6db9f6b577ecb79dfd3336b38.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p>Med en fejl, der fremst\u00e5r som f\u00f8lger:<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" src=\"\/wp-content\/uploads\/2020\/07\/f4d668075885bb66ce0158588bff038c.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><strong>Bedste h\u00e5ndtering af uventede fejl (rendering)<\/strong><\/p>\n<p><\/p>\n<blockquote><p>Introduktion til fejlgr\u00e6nser<\/p>\n<p>En JavaScript-fejl i brugergr\u00e6nsefladen m\u00e5 ikke stoppe hele applikationen. For at l\u00f8se dette problem for React-brugere introducerer React 16 et nyt begreb kaldet \"fejlh\u00e5ndteringsgr\u00e6nser\".<\/p>\n<p>Fejlgr\u00e6nser er React-komponenter, der fanger JavaScript-fejl, uanset hvor i deres barnetr\u00e6 de opst\u00e5r, registrerer disse fejl og viser en reserve-brugergr\u00e6nseflade i stedet for det komponenttr\u00e6, der er brudt. Fejlgr\u00e6nser fanger fejl under rendering, i livscyklusmetoder og i konstrukt\u00f8rer af hele tr\u00e6et under dem.<\/p>\n<p>\u2026<\/p>\n<p>Ny adf\u00e6rd for uopdagede fejl<\/p>\n<p>Denne \u00e6ndring er vigtig. Fra og med React 16 vil fejl, der ikke er fanget af nogen fejlgr\u00e6nse, resultere i, at hele React-komponenttr\u00e6et afmonteres.<\/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>Fejlmeddelelser i React 16<\/em><\/a><\/noindex><\/p><\/blockquote>\n<p>En vigtig pr\u00e6cisering, som tog mig noget tid at forst\u00e5, er, at <strong>den ovenfor n\u00e6vnte adf\u00e6rd kun g\u00e6lder for fejl, der genereres i renderingsmetoden (eller, hvad der er mere sandsynligt, i en hvilken som helst af livscyklusmetoderne)<\/strong>. For eksempel ville brugen af fejlgr\u00e6nser ikke v\u00e6re nyttig med vores knap <em>Fejl<\/em>; denne fejl opstod i klikhandleren.<\/p>\n<p><\/p>\n<p>Lad os oprette et eksempel p\u00e5 en visualiseringsfejl og derefter bruge fejlgr\u00e6nser til en mere elegant fejlh\u00e5ndtering.<\/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 Fejl\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>Observation:<\/p>\n<p><\/p>\n<ul>\n<li>\n<p>Ved klik p\u00e5 knappen, <em>React<\/em> vise <em>flag.busted.bogus<\/em>, som for\u00e5rsager en fejl<\/p>\n<p>\n<\/li>\n<li>\n<p>Uden fejlgr\u00e6nse vil hele komponenttr\u00e6et blive afmonteret<\/p>\n<p>\n<\/li>\n<\/ul>\n<p><\/p>\n<p>Derefter skriver vi vores fejlgr\u00e6nsekode (bruger den nye livscyklusmetode <em>componentDidCatch<\/em>); dette er i det v\u00e6sentlige et eksempel fra Dan Abramovs artikel:<\/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;Noget gik galt.&lt;\/h1&gt;;\n    }\n    return this.props.children;\n  }\n}<\/code><\/pre>\n<p><\/p>\n<p>Endelig bruger vi denne komponent:<\/p>\n<p><\/p>\n<p><em>react-app \/ src \/ App.js<\/em><\/p>\n<p><\/p>\n<pre><code class=\"plaintext\">...&lt;br&gt;import MyRenderError from &#039;.\/MyRenderError&#039;;&lt;br&gt;&lt;br&gt;class App extends Component {&lt;br&gt;  render() {&lt;br&gt;    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>N\u00e5r knappen Render Error trykkes, viser den reserve-brugergr\u00e6nsefladen og rapporterer fejlen til Sentry.<\/p>\n<p><\/p>\n<p><img decoding=\"async\" alt=\"Sentry fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" 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 fjernoverv\u00e5gning af fejl i frontend-applikationer i React\" src=\"\/wp-content\/uploads\/2020\/07\/58183f6f6aef124e8d14acaaf7e0d4fe.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p><\/p>\n<p><strong>Afslutning<\/strong><\/p>\n<p><\/p>\n<p>Jeg h\u00e5ber, du fandt det nyttigt.<\/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 til originalen<\/a><\/noindex> <\/p>\n<p><\/p>\n<p>P.S. Telegram-chat om Sentry <noindex><a rel=\"nofollow\" href=\"https:\/\/t.me\/sentry_ru\">https:\/\/t.me\/sentry_ru<\/a><\/noindex><\/p>\n<p>Kilde: <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\/da\/blog\/administrirovanie\/sentry-udalennyj-monitoring-bagov-v-frontend-prilozheniyah-react\" \/>\n\t\t<meta 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