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04-server.js
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82 lines (77 loc) · 2.58 KB
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var http = require('http');
var url = require('url');
var fs = require('fs');
var util = require('util');
var querystring = require('querystring');
var mimetype = {
'txt': 'text/plain',
'html': 'text/html',
'css': 'text/css',
'xml': 'application/xml',
'json': 'application/json',
'js': 'application/javascript',
'jpg': 'image/jpeg',
'jpeg': 'image/jpeg',
'gif': 'image/gif',
'png': 'image/png',
'svg': 'image/svg+xml'
}
var page_404 = function(req, res, path){
res.writeHead(404, {
'Content-Type': 'text/html'
});
res.write('<!doctype html>\n');
res.write('<title>404 Not Found</title>\n');
res.write('<h1>Not Found</h1>');
res.write(
'<p>The requested URL ' +
path +
' was not found on this server.</p>'
);
res.end();
}
var page_500 = function(req, res, error){
res.writeHead(500, {
'Content-Type': 'text/html'
});
res.write('<!doctype html>\n');
res.write('<title>Internal Server Error</title>\n');
res.write('<h1>Internal Server Error</h1>');
res.write('<pre>' + util.inspect(error) + '</pre>');
//方法返回 object 的字符串表示，主要用于调试。 附加的 options 可用于改变格式化字符串的某些方面。
}
http.createServer(function (req, res) {
var pathname = url.parse(req.url).pathname;
var realPath = __dirname + pathname;
if(req.method == "POST" && !mimetype[realPath.split('.').pop()]){
console.log(req.method);
// 定义了一个post变量，用于暂存请求体的信息
var post = '';
// 通过req的data事件监听函数，每当接受到请求体的数据，就累加到post变量中
req.on('data', function(chunk){
post += chunk;
});
// 在end事件触发后，通过querystring.parse将post解析为真正的POST请求格式，然后向客户端返回。
req.on('end', function(){
post = querystring.parse(post);
res.end(util.inspect(post));
});
return ;
}
fs.exists(realPath, function(exists){
if(!exists){
return page_404(req, res, pathname);
} else {
var file = fs.createReadStream(realPath);
res.writeHead(200, {
'Content-Type': mimetype[realPath.split('.').pop()] || 'text/plain'
});
file.on('data', res.write.bind(res));
file.on('close', res.end.bind(res));
file.on('error', function(err){
return page_500(req, res, err);
});
}
})
}).listen(1337, '127.0.0.1');
console.log('Server running at http://127.0.0.1:1337/');