Question

在index.js中，我能够在控制台中获取数据。但我正在尝试在浏览器中显示它。如何将数据从index.js发送到html页面？有谁可以帮我解决...

我在index.js中的代码：

 walk(dirctory, function(filePath, stat) {
       console.log(filePath); //able to get data 
      $("#table").val(filePath);
    });

我的HTML：

<script src="javascripts/script.js"></script>
<script src="javascripts/jquery-1.11.2.min.js"></script>

    <div id="box"> 
        <h2>DOWNLOAD</h2>
           <h> Download MLabs ".tgz" files for one month </h>
            <div id="text">
                    <form id="download" method="post" action="/download">
                    <center>
                        <span class ="mandatory" style="color:red">*</span>
                        <label>Year :  <select id ="year" name="year">
                        <option value="select year:" selected>Select year:</option>
                        <option value="2009">2009</option>
                        <option value="2010">2010</option>
                        <option value="2011">2011</option>
                        <option value="2012">2012</option>
                        <option value="2013">2013</option>
                        <option value="2014">2014</option>
                        <option value="2015">2015</option>      
                        </select>
                        </label></br></br>

                        <span class ="mandatory" style="color:red">*</span>
                        <label>Month :  <select id ="month" name="month">
                        <option value="select month:" selected>Select month:</option>
                        <option value="January">January</option>
                        <option value="February">February</option>
                        <option value="March">March</option>
                        <option value="April">April</option>
                        <option value="May">May</option>
                        <option value="June">June</option>
                        <option value="July">July</option>
                        <option value="August">August</option>
                        <option value="September">September</option>
                        <option value="October">October</option>
                        <option value="November">November</option>
                        <option value="December">December</option>
                        </select>
                        </label></br></br>

                        <span class ="mandatory" style="color:red">*</span>
                        <label>Number of files to download :  <select id ="files" name="files">
                        <option value="select value:" selected>Select value:</option>
                        <option value="1">1</option>
                        <option value="100">100</option>
                        <option value="150">150</option>
                        <option value="200">200</option>
                        <option value="ALL">ALL</option>
                        </select>
                        </label></br></br>

                            <input type="submit" name="submit" onclick="createFormElement()" value="Download" />&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<input type="reset" value="Reset" />
                    </center>
                </form>
              </div>
    </div>

<div id="fileDiv"></div>
</script>

我的index.js：

router.post('/download', function(req, res, next) {

    var year = req.body.year;
    var month = req.body.month;
    var limit = req.body.files;

function walk(currentDirPath, callback) {
    var fs = require('fs'), path = require('path');
    fs.readdirSync(currentDirPath).forEach(function(name) {
        var filePath = path.join(currentDirPath, name);
        var stat = fs.statSync(filePath);
        if (stat.isFile()) {
            callback(filePath, stat);
        } else if (stat.isDirectory()) {
            walk(filePath, callback);
        }
    });
}


var dirctory ="/usr/local/ndt-files"+"/"+year+"/"+month;
walk(dirctory, function(filePath, stat) {
   console.log(filePath);
  $("#table").val(filePath);
});


    var stream = fs.createWriteStream('views/downloadInput.txt');
    stream.once('open', function(fd) {
    stream.write(year);
    stream.write('/');
    stream.write(month);
    //stream.write('/');
    //stream.write(limit);
    stream.end();
    }); 

    child = exec("/usr/local/src/node-v0.10.35/nodeprograms/views/scriptformonth.sh",   
    function (error, stdout, stderr) {

        if (!error) {

            console.log(stdout);

        } else {

            res.send(error);

        }
        });
});

Answer 1

将Web服务器视为接收请求作为输入并输出响应的黑盒子。当您使用Web浏览器向Web服务器发送HTTP请求时，Web浏览器将收到响应。

因此，要回答您的问题，在服务器端，您无需将响应发送给特定客户端。只需使用res.send('whatever')，无论客户提出请求都会得到响应。

Answer 2

当您使用res.send(error)发生错误并完全忽略其他方案时，您只会将响应发送回客户端。您还需要使用res.send(..)发送输出。

在代码中进行以下更改 -

function (error, stdout, stderr) {

    if (!error) {

        console.log(stdout);
        // send the output here - 
        res.send(stdout);

    } else {

        res.send(error);
      }
    });

如何在node.js中将数据从服务器发送到客户端

2 个答案: