Nodejs 文件上传事例
//server.jsvar http = require("http");
var url = require("url");
function start(route, handle) {
var onRequest = function(request, response) {
var pathname = url.parse(request.url).pathname;
console.log("Request for " + pathname + " received.");
var postData = "";
/*
request.addListener("data", function(postDataChunk){
postData += postDataChunk;
console.log("Reserved POST data chunk'" + postDataChunk + "'.");
});
request.addListener("end", function() {
route(handle, pathname, response, postData);
});
*/
route(handle, pathname, response, request);
//route(handle, pathname, response);
}
http.createServer(onRequest).listen(8888);
console.log("Server has started.");
}
exports.start = start;
//router.js
function route(handle, pathname, response, request)
{
if(typeof(handle) === "function") {
console.log("About to route a request for " + pathname);
handle(response, request);
}
else {
console.log("No request handler found for " + pathname);
response.writeHead(404, {"Content-Type" : "text/html"});
response.write("404 Not found");
response.end();
}
}
exports.route = route;
//requestHandlers.js
var exec = require("child_process").exec;
var querystring = require("querystring"),
fs = require("fs"),
formidable = require("formidable");
function sleep(milliSeconds) {
var startTime = new Date();
while(new Date().getTime() < startTime + milliSeconds);
}
function start(response, request) {
console.log("Request handler 'start' was called. ");
/*
exec("dir",
{timeout: 10000, maxBuffer: 20000*1024},
function(error, stdout, stderr) {
response.writeHead(200, {"Content-Type" : "text/plain"});
response.write(stdout);
response.end();
});
*/
var body = '<html>' +
'<head>' +
'<meta http-equiv="Content-Type" content="text/html; ' +
'charset=UTF-8" />' +
'</head>' +
'<body>' +
'<form action="/upload" method="post" enctype="multipart/form-data" >' +
'<textarea name="text" rows="20" cols="60"></textarea> ' +
'<input type="file" name="upload" multiple="multiple" />' +
'<input type="submit" value="Submit Text" /> ' +
'</body>' +
'</html>';
response.writeHead(200, {"Content-Type" : "text/html"});
response.write(body);
response.end();
}
function upload(response, request) {
console.log("Request handler 'upload' was called. ");
var form = formidable.IncomingForm();
form.uploadDir = "tmp";
console.log("about to parse");
form.parse(request, function(error, fields, files) {
console.log("parsing done");
//sleep(10000);
setTimeout(function() {
try {
fs.renameSync(files.upload.path, "tmp/test.png");
} catch(e) {
console.log(e);
}
console.log(files.upload.path);
response.writeHead(200, {"Content-Type" : "text/html"});
response.write("received image:<br />");
response.write("<img src='/show' />");
response.end();}, 1000);
});
}
function show(response) {
console.log("Request handler 'show' was called. ");
fs.readFile("tmp/test.png", "binary", function(error, file) {
if(error) {
response.writeHead(500, {"Content-Type" : "text/plain"});
response.write(error + "\n");
response.end();
} else {
response.writeHead(200, {"Content-Type" : "image/png"});
response.write(file, "binary");
response.end();
}
});
}
exports.start = start;
exports.upload = upload;
exports.show = show;
//index.js
var server = require("./server");
var router = require("./router");
var requestHandlers = require("./requestHandlers");
var handle = {};
handle["/"] = requestHandlers.start;
handle["/start"] = requestHandlers.start;
handle["/upload"] = requestHandlers.upload;
handle["/show"] = requestHandlers.show;
server.start(router.route, handle);
参考：http://www.nodebeginner.org/index-zh-cn.html
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