使用命令行执行NODE.js脚本无反应

Question

我正在尝试编写一个脚本，用户可以在其中访问本地网站并粘贴他们的加密文本。但是，当我执行以下代码时，当用户提交文本时没有显示任何响应。我正在尝试使用 console.log(reqbody) 显示输入的文本，但没有显示任何内容。非常感谢帮助！

const http = require('http')
var qs = require("querystring");
const port = 9000

function getHome(request, response) {
    response.writeHead(200, { "Content-Type": "text/html" });
    response.write("<html><body>Encrypt your email! <a 
href='http://travistidwell.com/jsencrypt/demo/index.html'>Click.</a> Verify 
Wi-Fi AP <a href='/send'>Click here.</a></body ></html > ")
    response.end();
}

function get404(request, response) {
    response.writeHead(404, "Resource Not Found", { "Content-Type": 
"text/html" });
    response.write("<html><title> Error 404 </title><h1>404: Resource not 
found!</h1></html >")
    response.end();
}

function get405(request, response) {
    response.writeHead(405, "Method not supported", { "Content-Type": 
"text/html" });
    response.write("<html><title> Error 405</title><h1>Error 405: Method not 
supported.</h1></html >")
    response.end();
}

function getSendForm(request, response) {
    response.write("<html><body><form method='post'><form><tr><td>Enter the 
encrypted text:</td><td><input type='text' id='encryptedtext' value='Paste 
encrypted text.'/></td></tr><tr><td><input type='submit' value='Send'/></td>
</tr></form> </body></html>")  
    };

    http.createServer(function (request, response) {
        console.log(request.url);
        switch (request.method) {
            case "GET":
                if (request.url === "/") {
                    getHome(request, response);
                }
                else if (request.url === "/send") {
                    getSendForm(request, response);
                }
                else {
                    get404(request, response);
                }
                break;
            case "POST":
                if (request.url === "/send") {
                    var reqBody = '';
                    request.on('data', function (data) {
                        reqBody += data;
                        if (reqBody.length > 1e7) //10mb
                        {
                            response.writeHead(413, 'Too large encrypted 
data.', { 'Content-Type': 'text/html' });
                            response.write("<html><title> Error 413 </title>
<h1>413: Too much data.</h1></html >")
                            response.end();
                        }
                    });
                    request.on('end', function (data) {
                        console.log(reqBody);
                    });
                }
                else {
                    get404(request, response);
                }
                break;
           default:
                get405(request, response);
                break;
        }
    }).listen(port);
    console.log("server")

Answer 1

我看到你的代码有两个错误，你需要修改。

首先是<form method='post'><form>删除表格的一个标签

其次是 <input type='text' id='encryptedtext' value='Paste encrypted text.'/> 你不需要 'id' 但 'name' .

下面有完整的修复

 response.write("<html><body><form method='post'><tr><td>Enter the 
encrypted text:</td><td><input type='text' name='encryptedtext' value='Paste 
encrypted text.'/></td></tr><tr><td><input type='submit' value='Send'/></td>
</tr></form> </body></html>")  
    };

Answer 2

您的代码有几个问题：

在函数getSendForm()中，缺少response.end()，这意味着网页/send永远不会结束加载——页面中会有一个旋转器保持运行选项卡
错误地插入了 <form> 标签，如@TonyY 所述。
表单的action不见了，根据你的代码应该是/send
name of input 元素缺失，如@TonyY 所述。
Paste encrypted text. 应该是 placeholder，而不是 value。
response.end() 在 POST /send 的处理程序中缺失，因此在提交表单后没有向用户显示任何响应。

固定代码如下：

const http = require('http')
var qs = require("querystring");
const port = 9000

...

function getSendForm(request, response) {
  response.write("<html><body><form method='post' action='/send'><tr><td>Enter the encrypted text:</td><td><input type='text' id='encryptedtext' name='encryptedtext' placeholder='Paste encrypted text.'/></td></tr><tr><td><input type='submit' value='Send'/></td></tr></form> </body></html>")
  response.end();
};

http.createServer(function (request, response) {
  console.log(request.url);
  switch (request.method) {
    case "GET":
      if (request.url === "/") {
        getHome(request, response);
      }
      else if (request.url === "/send") {
        getSendForm(request, response);
      }
      else {
        get404(request, response);
      }
      break;
    case "POST":
      if (request.url === "/send") {
        var reqBody = '';
        request.on('data', function (data) {
          reqBody += data;
          if (reqBody.length > 1e7) //10mb
          {
            response.writeHead(413, 'Too large encrypted data.', { 'Content-Type': 'text/html' });
            response.write("<html><title> Error 413 </title> <h1>413: Too much data.</h1></html >")
            response.end();
          }
        });
        request.on('end', function (data) {
          console.log(reqBody);
          response.end('Done!');
        });
      }
      else {
        get404(request, response);
      }
      break;
    default:
      get405(request, response);
      break;
  }
}).listen(port);
console.log("server")

使用命令行执行NODE.js脚本无反应

No response when using commandline to execute NODE.js script

console

http

response

request

node.js