Question

我在尝试接收帖子数据时遇到问题，而没有先从网络浏览器运行html页面。我想知道是否有一种方法使用NodeJS，有人可以运行给定的html文档，静默检索Post数据和控制台输出。我需要这个，以便允许在云或远程服务器环境中进行开发。

当前用法Server.js：

var spawn = require('child_process').spawn; // Will not do for the situation of development within something similar to an Ubuntu Server
spawn(command, ["http://localhost:80/Develop/Client.html"]);
http.createServer(mainArgs).listen(options); // mainArgs is the function (req,res) callback

function mainArgs(req,res){
    if (req.method == 'POST') { // NodeJS is Getting what is posted...
        console.log("POST");

        var url_parts = url.parse(req.url, true);
        currentQuery = url_parts.query;

        req.on('end', function () {
            console.log("Body: " + currentQuery['stubScript']);
            writeHTML(currentQuery['stubScript']);
        });
    }

    ..... // HTML, JavaScript, & CSS Handled here
}

当前使用情况Client.html：

<html>
     <head>
          //Posts data via XMLHttpRequest()
          <script src=devScript.js></script>
     </head>
     <body>
          <script>
               // Access Devscript functions and build page using javascript
          </script>
     </body>
</html>

当前用法devScript.js：

function postIt(varname, variable) {

    var req = new XMLHttpRequest();
    var getParms = '?'+ varname + '=' + variable;

    req.open('POST', document.URL + getParms, true);

    req.onreadystatechange = function(){
        if (req.readyState == 4 && req.status == 200)
        {
            alert('PHPcall() : JSObject =' + varname );
        }
    };

    req.send(getParms);


} // Client is posting...

Answer 1

您正在寻找发送HTML请求。

您可以使用request等模块或wget或curl等终端程序执行此操作。

但是如果你需要在没有任何模块的情况下这样做（我建议使用模块，它们在许多方面都是理智的，以下情况不是这样）你可以通过使用本机来做this SO thread中讨论的内容http和querystring个模块。

以下是该主题的代码：

// We need this to build our post string
var querystring = require('querystring');
var http = require('http');
var fs = require('fs');

function PostCode(codestring) {
  // Build the post string from an object
  var post_data = querystring.stringify({
      'compilation_level' : 'ADVANCED_OPTIMIZATIONS',
      'output_format': 'json',
      'output_info': 'compiled_code',
      'warning_level' : 'QUIET',
      'js_code' : codestring
  });

  // An object of options to indicate where to post to
  var post_options = {
      host: 'closure-compiler.appspot.com',
      port: '80',
      path: '/compile',
      method: 'POST',
      headers: {
          'Content-Type': 'application/x-www-form-urlencoded',
          'Content-Length': Buffer.byteLength(post_data)
      }
  };

  // Set up the request
  var post_req = http.request(post_options, function(res) {
      res.setEncoding('utf8');
      res.on('data', function (chunk) {
          console.log('Response: ' + chunk);
      });
  });

  // post the data
  post_req.write(post_data);
  post_req.end();

}

// This is an async file read
fs.readFile('LinkedList.js', 'utf-8', function (err, data) {
  if (err) {
    // If this were just a small part of the application, you would
    // want to handle this differently, maybe throwing an exception
    // for the caller to handle. Since the file is absolutely essential
    // to the program's functionality, we're going to exit with a fatal
    // error instead.
    console.log("FATAL An error occurred trying to read in the file: " + err);
    process.exit(-2);
  }
  // Make sure there's data before we post it
  if(data) {
    PostCode(data);
  }
  else {
    console.log("No data to post");
    process.exit(-1);
  }
});

但是我强烈建议使用request / wget / curl，因为错误处理是集中的，诸如表单（multipart，urlencoded等），json数据和Headers之类的东西在'client'端正确实现，大大减少了数量你会遇到的虫子。

Answer 2

所以你想运行一个进程并将stdout发布到一个URL？您当前的用法会将URL作为参数传递给您生成的命令。因此，该过程将负责将POST数据发送到URL。

要获取spawn过程的输出，请参阅：15339379

要发出POST请求，请参阅：6158933

如果这些答案有帮助，请确保对它们进行投票。

更新：听起来您想要接受 POST请求;见blog post。

NodeJS - 在没有浏览器的情况下检索发布数据

2 个答案: