如何使用nodejs上传文件

我想用nodejs上传一个图像。

我将文件发送到node，但接下来的问题是我不知道如何处理"req"。

客户端

<html>
    <body>
        <input id="uploadInput" type="file"/>
        <div id="uploadShow"></div>
        <script type="text/javascript">
            uploadInput = document.getElementById("uploadInput");
            uploadInput.onchange = function() {  //when file ready to upload
                if(uploadInput.files && uploadInput.files[0]) {
                    var file = uploadInput.files[0];  //I want to send the file
                    var xhr = new XMLHttpRequest();
                    if (xhr.readyState == 4 && xhr.status == 200) {
                        var uploadShow = document.getElementById("uploadInput");
                        uploadShow.innerHTML = xhr.responseText;  //show file
                    }
                    xhr.open('POST', "/upload", false);
                    xhr.send(file);  //send file...
                }
            };
        </script>
    </body>
</html>

服务器

var http = require('http'),url = require("url"),
    path = require('path'),fs = require('fs');
http.createServer(function(req, res) {
    var filename = "/index.html";
    if (req.url !== "/") {
       filename = url.parse(req.url, true).pathname;
       filename = filename.split("?")[0];
    }
    if (filename === "/upload" && req.method.toLowerCase() == 'post') {
        //deal the request of ajax
        **upload_file**(req, res);  //can you help me to write this function
        return;
    }
    //the following fs.readFile index.html
}).listen("192.168.39.9", 8888);

如何上传图片并进行展示

我认为文件上传不会以这种方式工作。如果你可以使用express，我建议你使用强大的支持ajax文件上传；

点击此处查看：https://stackoverflow.com/a/20372845/1520518

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