如何从Node.js服务器重定向到另一个页面

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英文:

how to redirect to another page from a node.js server

问题

这是Node.js服务器的代码，你想要在这里进行重定向。但是要注意，Node.js的http模块本身不提供直接的res.redirect函数。你需要使用res.writeHead和res.end来手动发送一个重定向响应。以下是代码的修改部分：

  1. http.createServer(function (req, res) {
  2.     var urlQuery = url.parse(req.url, true).query;
  3.     removeItem(urlQuery.itemToRemove);
  4.     addItem(urlQuery.itemToAdd);
  6.     // 手动进行重定向
  7.     res.writeHead(302, {
  8.         'Location': '/index.html' // 重定向到index.html或你想要的URL
  9.     });
  10.     res.end();
  11. }).listen(8080);

这里我用res.writeHead设置了状态码为302，表示重定向，然后在响应头中设置了重定向的目标URL。这样，当请求到达服务器时，它将重定向到指定的URL。

英文:

i have been struggling for the pas few days i want to redirect to another page from my node.js server.
first by website is redirecting me to my server to do a task but when that task is done i want the server to redirect me back to my website.
here is the node js server code.

  1. var http = require('http');
  2. var url = require('url');
  3. var MongoClient = require('mongodb').MongoClient;
  4. var mongourl = "mongodb://localhost:27017/";
  6. http.createServer(function (req, res) {
  7.     res.writeHead(200, {
  8.         'Content-Type': 'text/html'
  9.     });
  10.     var urlQuery = url.parse(req.url, true).query;
  11.     removeItem(urlQuery.itemToRemove);
  12.     addItem(urlQuery.itemToAdd);
  13.     **// i have been trying to redirect to my html site **
  14.     **// i have got a error saying TypeError: res.redirect is not a function**
  15.     res.redirect('index.html');
  16.     res.end();
  17. }).listen(8080);
  21. function removeItem(remove) {
  22.     if (remove !== undefined) {
  23.         MongoClient.connect(mongourl, function (err, db) {
  24.             if (err) throw err;
  25.             var dbo = db.db("mydb");
  26.             var myquery = {
  27.                 itemName: remove
  28.             };
  29.             dbo.collection("shoppingCart").deleteOne(myquery, function (err, obj) {
  30.                 if (err) throw err;
  31.                 console.log("deleted:" + myquery);
  32.                 db.close();
  33.             });
  34.         });
  35.     }
  36. }
  38. function addItem(create) {
  39.     if (create !== undefined) {
  40.         MongoClient.connect(mongourl, function (err, db) {
  41.             if (err) throw err;
  42.             var dbo = db.db("mydb");
  43.             var myobj = {
  44.                 itemName: create
  45.             };
  46.             dbo.collection("shoppingCart").insertOne(myobj, function (err, res) {
  47.                 if (err) throw err;
  48.                 console.log("document inserted:" + myobj);
  49.                 db.close();
  50.             });
  51.         });
  52.     }
  53. }

答案1

得分: 0

你遇到该错误是因为 response.redirect() 是一个 Express 函数，而你的应用程序纯粹基于 Node.js 的 http 库。

你可以通过以下方式实现你所提到的功能：

  1. res.writeHead(301, { Location: 'your-location' });
  2. res.end();
英文:

You are getting that error because response.redirect() is an express function and your app is based purely on nodejs http library.

You can accomplish what you have mentioned this way:

  1. res.writeHead(301,{Location: 'your-location'});
  2. res.end();

答案2

得分: 0

你没有正确地创建服务器。尽量保持代码整洁，编写单独的API用于提供index.html，不要将其放在创建服务器的内部。

英文:

You are not creating the server properly. Try to keep your code clean,Write separate API for serving index.html, not inside creating the server.

答案3

得分: 0

> TypeError: res.redirect is not a function

这是因为 res.redirect 是一个 Express 函数，而您正在使用纯粹的 http 节点服务器。

您可以考虑使用 express 来处理重定向。

  1. var http = require('http');
  2. var url = require('url');
  3. var MongoClient = require('mongodb').MongoClient;
  4. var mongourl = 'mongodb://localhost:27017/';
  6. // express
  7. const express = require('express');
  8. const app = express();
  9. const port = 8080;
  11. // 用于模板化
  12. // 创建 `views/` 文件夹
  13. // 并放置 `index.pug` 和 `redirected-page.pug`
  14. app.set('view engine', 'pug');
  16. app.get('/redirect', (req, res) => {
  17.   res.render('redirected-page');
  18. });
  20. app.get('/', (req, res) => {
  21.   var urlQuery = url.parse(req.url, true).query;
  22.   Promise.all([
  23.     removeItem(urlQuery.itemToRemove),
  24.     addItem(urlQuery.itemToAdd),
  25.   ]).then(() => {
  26.     res.redirect('redirect');
  27.   });
  28. });
  30. app.use(function(err, req, res, next) {
  31.   console.error(err.stack);
  32.   res.status(500).send('Something broke!');
  33. });
  35. function removeItem(remove) {
  36.   if (remove !== undefined) {
  37.     MongoClient.connect(mongourl, function(err, db) {
  38.       if (err) throw err;
  39.       var dbo = db.db('mydb');
  40.       var myquery = {
  41.         itemName: remove,
  42.       };
  43.       dbo.collection('shoppingCart').deleteOne(myquery, function(err, obj) {
  44.         if (err) throw err;
  45.         console.log('deleted:' + myquery);
  46.         db.close();
  47.       });
  48.     });
  49.   }
  50. }
  52. function addItem(create) {
  53.   if (create !== undefined) {
  54.     MongoClient.connect(mongourl, function(err, db) {
  55.       if (err) throw err;
  56.       var dbo = db.db('mydb');
  57.       var myobj = {
  58.         itemName: create,
  59.       };
  60.       dbo.collection('shoppingCart').insertOne(myobj, function(err, res) {
  61.         if (err) throw err;
  62.         console.log('document inserted:' + myobj);
  63.         db.close();
  64.       });
  65.     });
  66.   }
  67. }
  69. app.listen(port, () => console.log(`Server is running at ${port}!`));
英文:

> TypeError: res.redirect is not a function

This is because res.redirect is an express function and you're using plain http node server.

You can consider using express for handling redirects for you.

  1. var http = require('http');
  2. var url = require('url');
  3. var MongoClient = require('mongodb').MongoClient;
  4. var mongourl = 'mongodb://localhost:27017/';
  5. // express
  6. const express = require('express');
  7. const app = express();
  8. const port = 8080;
  9. // for templating
  10. // create `views/` folder
  11. // and place `index.pug` and `redirected-page.pug`
  12. app.set('view engine', 'pug');
  13. app.get('/redirect', (req, res) => {
  14. res.render('redirected-page');
  15. });
  16. app.get('/', (req, res) => {
  17. var urlQuery = url.parse(req.url, true).query;
  18. Promise.all([
  19. removeItem(urlQuery.itemToRemove),
  20. addItem(urlQuery.itemToAdd),
  21. ]).then(() => {
  22. res.redirect('redirect');
  23. });
  24. });
  25. app.use(function(err, req, res, next) {
  26. console.error(err.stack);
  27. res.status(500).send('Something broke!');
  28. });
  29. function removeItem(remove) {
  30. if (remove !== undefined) {
  31. MongoClient.connect(mongourl, function(err, db) {
  32. if (err) throw err;
  33. var dbo = db.db('mydb');
  34. var myquery = {
  35. itemName: remove,
  36. };
  37. dbo.collection('shoppingCart').deleteOne(myquery, function(err, obj) {
  38. if (err) throw err;
  39. console.log('deleted:' + myquery);
  40. db.close();
  41. });
  42. });
  43. }
  44. }
  45. function addItem(create) {
  46. if (create !== undefined) {
  47. MongoClient.connect(mongourl, function(err, db) {
  48. if (err) throw err;
  49. var dbo = db.db('mydb');
  50. var myobj = {
  51. itemName: create,
  52. };
  53. dbo.collection('shoppingCart').insertOne(myobj, function(err, res) {
  54. if (err) throw err;
  55. console.log('document inserted:' + myobj);
  56. db.close();
  57. });
  58. });
  59. }
  60. }
  61. app.listen(port, () => console.log(`Server is running at ${port}!`));

huangapple
  • 本文由 发表于 2020年1月3日 14:33:01
  • 转载请务必保留本文链接：https://go.coder-hub.com/59574142.html
  • mongodb
  • node.js
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