问题：console.log(html),控制台输出成功，但res.end(html)无法渲染页面。

Question

1.代码var http = require("http");var path = require("path");var url = require("url");var fs = require("fs");var ejs = require("ejs");var server = http.createServer(function (req, res) { if (req.url == "/favicon.ico") { return; } var pathname = url.parse(req.url).pathname; var fileUrl = path.normalize("./public/" + pathname); var extname = path.extname(pathname); fs.readFile(fileUrl, function (err, fileData) { getMime(extname, function (mime) { res.writeHead(200, { "context-type": mime }); res.end(fileData); }) }); if (pathname == "/") { var _thisUrl = "./public" var fileArry = [];//存储各个文件data的一些数据 var a = {} var data = {};//存储file(是否事文件,1是，0不是);fileName:文件(夹)名;url:文件实际地址 fs.readdir(_thisUrl, function (err, files) { var length = files.length; (function iterator(i) { var show = 0; if (i >= files.length) { data = { "fa": fileArry, "length": length }; fs.readFile("./views/index.ejs", function (err, fileData) { var template = fileData.toString(); var html = ejs.render(template, data); console.log(html); res.end(html); }); return; } fs.stat(_thisUrl + "/" + files[i], function (err, stats) { if (stats.isDirectory()) { a = { "file": 0, "fileName": files[i], "url": _thisUrl + "/" + files[i] } } else { if (path.extname("/" + files[i]).toLocaleLowerCase() == ".jpg") { show = 1; } a = { "file": 1, "fileName": files[i], "url": _thisUrl + "/" + files[i], "show": show } } fileArry.push(a); //console.log(fileArry); iterator(i + 1); }) })(0); }); };});server.listen(3000, "127.0.0.1");function getMime(extname, fn) { fs.readFile("./public/mime.json", function (err, data) { var mimeList = JSON.parse(data); var mime = mimeList[extname]; fn(mime); })}2.控制台截图我是小白，请解释的稍微浅显些，谢谢各位大神。

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Answer 1

var http = require("http");var path = require("path");var url = require("url");var fs = require("fs");var ejs = require("ejs");var server = http.createServer(function (req, res) {    if (req.url == "/favicon.ico") {        return;    }    var pathname = url.parse(req.url).pathname;    var fileUrl = path.normalize("./public/" + pathname);    var extname = path.extname(pathname);     fs.readFile(fileUrl, function (err, fileData) {        getMime(extname, function (mime) {            res.writeHead(200, { "context-type": mime });            res.end(fileData);        })    });    if (pathname == "/") {        var _thisUrl = "./public"        var fileArry = [];//存储各个文件data的一些数据        var a = {}        var data = {};//存储file(是否事文件,1是，0不是);fileName:文件(夹)名;url:文件实际地址        fs.readdir(_thisUrl, function (err, files) {            var length = files.length;            (function iterator(i) {                var show = 0;                if (i >= files.length) {                    data = { "fa": fileArry, "length": length };                     fs.readFile("./views/index.ejs", function (err, fileData) {                        var template = fileData.toString();                        var html = ejs.render(template, data);                        console.log(html);                        res.end(html);                    });                    return;                }                fs.stat(_thisUrl + "/" + files[i], function (err, stats) {                    if (stats.isDirectory()) {                        a = { "file": 0, "fileName": files[i], "url": _thisUrl + "/" + files[i] }                    }                    else {                        if (path.extname("/" + files[i]).toLocaleLowerCase() == ".jpg") {                            show = 1;                        }                        a = { "file": 1, "fileName": files[i], "url": _thisUrl + "/" + files[i], "show": show }                    }                    fileArry.push(a);                    //console.log(fileArry);                    iterator(i + 1);                })            })(0);         });     };   }); server.listen(3000, "127.0.0.1");function getMime(extname, fn) {    fs.readFile("./public/mime.json", function (err, data) {        var mimeList = JSON.parse(data);        var mime = mimeList[extname];        fn(mime);    })}