node.js

Question

我正在 Udemy 上参加代码训练营。

挑战在于使用 Node.js 和 ejs 创建博客站点。我已经完成挑战并且博客网站可以正常运行。但是，我想改变一件事，我正在努力寻找可行的解决方案。

我的 app.js 文件将 'push' 我在撰写页面中创建的 post 到主页，然后将我重定向到那里。然后主页在 100 个字符后给我一个“...阅读更多”。如果 post 的标题中有一个“/”，例如“1/2/22”，那么当我单击“阅读更多”按钮时，我会收到错误 'Cannot GET /posts/1/2/22'。我明白为什么会出现此错误，所以我希望有人能帮助我防止有人在输入字段中输入“/”或其他特殊字符。

我试过 regEx 但无法正常工作。

<!-- My home page -->

<h1>Home</h1>
  <p>
    <%= startingContent %>
  </p>


  <% posts.forEach(function(post){ %>

    <h1>
      <%=post.title%>
    </h1>
    <p>
      <%=post.content.substring(0, 100) + " ..." %>
        <a href="/posts/<%= post.title %>">Read More</a>
    </p>


    <% }) %>

<!--  this is the page to type the post and submit it -->
<h1>Compose</h1>
    <form class="" action="/compose" method="post">
      <div class="form-group">
        <label>Title</label>
        <input class="form-control" type="text" name="postTitle">
        <label>Post</label>
        <textarea class="form-control" name="postBody" rows="5" cols="30"></textarea>
      </div>
      <button class="btn btn-primary" type="submit" name="button">Publish</button>
    </form>

//app.js file

const express = require("express");
const bodyParser = require("body-parser");
const ejs = require("ejs");
const _ = require("lodash");
const port = 3000;

const homeStartingContent = "Lacus vel facilisis volutpat est velit egestas dui id ornare. Semper auctor neque vitae tempus quam. Sit amet cursus sit amet dictum sit amet justo. Viverra tellus in hac habitasse. Imperdiet proin fermentum leo vel orci porta. Donec ultrices tincidunt arcu non sodales neque sodales ut. Mattis molestie a iaculis at erat pellentesque adipiscing. Magnis dis parturient montes nascetur ridiculus mus mauris vitae ultricies. Adipiscing elit ut aliquam purus sit amet luctus venenatis lectus. Ultrices vitae auctor eu augue ut lectus arcu bibendum at. Odio euismod lacinia at quis risus sed vulputate odio ut. Cursus mattis molestie a iaculis at erat pellentesque adipiscing.";
const aboutContent = "Hac habitasse platea dictumst vestibulum rhoncus est pellentesque. Dictumst vestibulum rhoncus est pellentesque elit ullamcorper. Non diam phasellus vestibulum lorem sed. Platea dictumst quisque sagittis purus sit. Egestas sed sed risus pretium quam vulputate dignissim suspendisse. Mauris in aliquam sem fringilla. Semper risus in hendrerit gravida rutrum quisque non tellus orci. Amet massa vitae tortor condimentum lacinia quis vel eros. Enim ut tellus elementum sagittis vitae. Mauris ultrices eros in cursus turpis massa tincidunt dui.";
const contactContent = "Scelerisque eleifend donec pretium vulputate sapien. Rhoncus urna neque viverra justo nec ultrices. Arcu dui vivamus arcu felis bibendum. Consectetur adipiscing elit duis tristique. Risus viverra adipiscing at in tellus integer feugiat. Sapien nec sagittis aliquam malesuada bibendum arcu vitae. Consequat interdum varius sit amet mattis. Iaculis nunc sed augue lacus. Interdum posuere lorem ipsum dolor sit amet consectetur adipiscing elit. Pulvinar elementum integer enim neque. Ultrices gravida dictum fusce ut placerat orci nulla. Mauris in aliquam sem fringilla ut morbi tincidunt. Tortor posuere ac ut consequat semper viverra nam libero.";

const app = express();

app.set('view engine', 'ejs');

app.use(bodyParser.urlencoded({ extended: true }));
app.use(express.static("public"));

let posts = [];

app.get("/", (req, res) => {
  res.render("home", {
    startingContent: homeStartingContent,
    posts: posts
  });
});

app.get("/about", (req, res) => {
  res.render("about", {
    aboutContent: aboutContent
  });
});

app.get("/contact", (req, res) => {
  res.render("contact", {
    contactContent: contactContent
  });
});

app.get("/compose", (req, res) => {
  res.render("compose");
});

app.post("/compose", (req, res) => {
  const post = {
    title: req.body.postTitle,
    content: req.body.postBody
  };

  posts.push(post);
  res.redirect("/");

});

app.get("/posts/:postName", (req, res) => {
  const requestedTitle = _.lowerCase(req.params.postName);

  posts.forEach((post) => {
    const storedTitle = _.lowerCase(post.title);

    if (storedTitle === requestedTitle) {
      res.render("post", {
        title: post.title,
        content: post.content
      });
    }
  });

});

app.listen(port, () => {
  console.log(`Server is running on port ${port}`);
});

Answer 1

'Cannot GET /posts/1/2/22'

要么你做 app.get("/posts/:postName(*)"

参考：Solution

node.js - 需要验证我的输入字段

node.js - need to validate my input field

javascript

ejs

express