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我正在尝试学习节点的来龙去脉。我知道您可以使用框架提供文件,但我正在尝试手动完成。我在“./public/logo.jpg”中有一个 jpeg 文件。当我通过 localhost:8080 发送请求时,我没有得到图像,只是一个带有通用图像占位符的空白屏幕。我究竟做错了什么?谢谢!

var http=require('http');
var url=require('url');
var fs=require('fs');

// creates a new httpServer instance
http.createServer(function (req, res) {
// this is the callback, or request handler for the httpServer
log('in server callback')
res.ins=res.write;

var parse=url.parse(req.url,true);
var path0=parse.pathname;
console.log(path0)
// respond to the browser, write some headers so the 
// browser knows what type of content we are sending

var serveFile=function(){
    var path='./public'+path0
    fs.exists(path,function(e){
        if(e){
            log('serving file')
            log(path)
            fs.readFile(path,'binary',function(err,data){
                if(data){
                    res.writeHead(200, {'Content-Type': 'image/jpeg'});
                    res.ins(data)
                    res.end()
                }
            })
        }
        else{
            log('no file to serve')
            log(path)
            servePage()
        }   
    })
}
serveFile()
}).listen(8080); // the server will listen on port 8080
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1 回答 1

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readFile只需在回调 中更改以下两行:

res.writeHead(200, {'Content-Type': 'image/jpeg'});
res.write(data, 'binary');

用于response.write向客户端发送数据并将编码设置为binary. (默认为 utf-8)

于 2013-07-15T19:53:14.893 回答