var server = http.createServer(function(req,res){ res.setHeader(‘Content-Type’,’text/html’); res.end(‘Hello World’); }); server.listen(3000,’127.0.0.1’); 可以给浏览器发送字符串，如果我想给浏览器仅仅发送一张图片该怎么做？ var server = http.createServer(function(req,res){ res.setHeader(‘Content-Type’,’image/png’); //假如拿到图片数据，var image,如何发送到浏览器显示呢？ }); server.listen(3000,’127.0.0.1’);
你是问上传图片吗？ 还是静态服务器？
这里有一个静态文件服务器的例子：
var http = require('http'),
url = require('url'),
path = require('path'),
fs = require('fs');
var PORT = 8080,
mimeTypes = {
"html": "text/html",
"jpeg": "image/jpeg",
"jpg": "image/jpeg",
"png": "image/png",
"js": "text/javascript",
"css": "text/css",
"txt": "text/plain"
};
var server = http.createServer(function(req,res){
var pathname = __dirname + url.parse(req.url).pathname;
fs.exists(pathname, function(exists){
var fileSteam,
mimeType = mimeTypes[path.extname(pathname).split(".")[1]];
if(!exists){
res.writeHead(404, {"Content-Type": "text/plain"});
res.write('This requst URL ' + pathname + ' was not found on this server.');
res.end();
return;
}
res.writeHead(200,{"Content-Type": mimeType});
fileSteam = fs.createReadStream(pathname);
fileSteam.pipe(res);
});
});
server.listen(PORT);
console.log('Server runing at port: ' + PORT + '.');
只要输出对应mime类型，然后通过readStream输入流的pipe方法流向res(输出流)
var http = require( ‘http’ ); var fs = require( ‘fs’ ); http.createServer( function ( req, res ) { res.writeHead( 200, { 'content-type’: ‘image/jpeg’ } ); var cs = fs.createReadStream( './sl.jpg’, { 'flag’: ‘r’ } ); cs.pipe( res ); //只读流流向输出流 } ).listen( 7878, function () { console.log( ‘server is start’ );//服务器都有静态文件功能 } )
