NodeJS 中的基本静态文件服务器 [英] Basic static file server in NodeJS

问题描述

我试图在 nodejs 中创建一个静态文件服务器，更多的是作为理解 node 的练习，而不是作为一个完美的服务器.我非常了解 Connect 和 node-static 等项目，并且完全打算将这些库用于更多的生产就绪代码，但我也喜欢了解我正在使用的基础知识.考虑到这一点，我编写了一个小型 server.js:

I'm trying to create a static file server in nodejs more as an exercise to understand node than as a perfect server. I'm well aware of projects like Connect and node-static and fully intend to use those libraries for more production-ready code, but I also like to understand the basics of what I'm working with. With that in mind, I've coded up a small server.js:

var http = require('http'),
    url = require('url'),
    path = require('path'),
    fs = require('fs');
var mimeTypes = {
    "html": "text/html",
    "jpeg": "image/jpeg",
    "jpg": "image/jpeg",
    "png": "image/png",
    "js": "text/javascript",
    "css": "text/css"};

http.createServer(function(req, res) {
    var uri = url.parse(req.url).pathname;
    var filename = path.join(process.cwd(), uri);
    path.exists(filename, function(exists) {
        if(!exists) {
            console.log("not exists: " + filename);
            res.writeHead(200, {'Content-Type': 'text/plain'});
            res.write('404 Not Found
');
            res.end();
        }
        var mimeType = mimeTypes[path.extname(filename).split(".")[1]];
        res.writeHead(200, mimeType);

        var fileStream = fs.createReadStream(filename);
        fileStream.pipe(res);

    }); //end path.exists
}).listen(1337);

我的问题是双重的

1. 这是在节点中创建和流式传输基本 html 等的正确"方式还是有更好/更优雅/更健壮的方法?

1. Is this the "right" way to go about creating and streaming basic html etc in node or is there a better/more elegant/more robust method ?

node 中的 .pipe() 是否基本上只是在执行以下操作?

Is the .pipe() in node basically just doing the following?

.

var fileStream = fs.createReadStream(filename);
fileStream.on('data', function (data) {
    res.write(data);
});
fileStream.on('end', function() {
    res.end();
});

谢谢大家！

推荐答案

• 你的基本服务器看起来不错，除了:

  • Your basic server looks good, except:

    缺少return 语句.

    res.write('404 Not Found
    ');
    res.end();
    return; // <- Don't forget to return here !!
    

    还有:

    res.writeHead(200, mimeType);

    应该是:

    res.writeHead(200, {'Content-Type':mimeType});

    是的 pipe() 基本上就是这样做的，它还暂停/恢复源流(以防接收器速度较慢).下面是 pipe() 函数的源代码:https:///github.com/joyent/node/blob/master/lib/stream.js

    Yes pipe() does basically that, it also pauses/resumes the source stream (in case the receiver is slower). Here is the source code of the pipe() function: https://github.com/joyent/node/blob/master/lib/stream.js

    这篇关于NodeJS 中的基本静态文件服务器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！