Javascript Node.JS readFileSync() 函数
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Node.JS readFileSync() function
提问by Xylon
index.js
索引.js
var server = require("./server");
var router = require("./router");
server.start(router.route);
server.js
服务器.js
//Script to start a server
var http = require("http");
var url = require("url");
var fs = require("fs");
function start(route) {
function onRequest(request, response) {
var pathname = url.parse(request.url).pathname;
route(pathname, response, fs);
}
http.createServer(onRequest).listen(8888);
console.log("Server has started.");
}
exports.start = start;
router.js
路由器.js
function route(pathname, response, fs) {
var regex = new RegExp('^/view/?$');
var directpath = "D:/nodejs/file_upload" + pathname;
var voo = fs.readFileSync(directpath);
if(regex.test(pathname)){
response.writeHead(200, {"Content-Type": "text/html"});
console.log("About to route a request for " + pathname);
response.end(voo);
} else{
response.writeHead(404);
response.end("<br/>404, file not found");
}
}
exports.route = route;
index.html
索引.html
<!DOCTYPE html>
<html>
<body>
<p>Hello My friend </p>
</body>
</html>
I'm trying to store the file path in a variable and then feed it ti readFileSync() function, but this gives me fllowing error in the console.
我试图将文件路径存储在一个变量中，然后将它提供给 readFileSync() 函数，但这给我带来了控制台中的错误。
Error: EISDIR, illegal operation on a directory
at Object.fs.readSync (fs.js:487:19)
at Object.fs.readFileSync (fs.js:326:28)
at route (D:\nodejs\file_upload\router.js:7:15)
at Server.onRequest (D:\nodejs\file_upload\server.js:15:6)
at Server.emit (events.js:98:17)
at HTTPParser.parser.onIncoming (http.js:2108:12)
at HTTPParser.parserOnHeadersComplete [as onHeadersComplete] (http.js:121:23
)
at Socket.socket.ondata (http.js:1966:22)
at TCP.onread (net.js:527:27)
but if I enter the path "D:/nodejs/file_upload/view/index.html" in the function directly then it shows me the page in the browser.
但是如果我直接在函数中输入路径“D:/nodejs/file_upload/view/index.html”，那么它会在浏览器中显示页面。
I stored the index.html file in the view folder
我将 index.html 文件存储在视图文件夹中
回答by Tom Grant
EISDIRerror occurs when you try to open a file, but the path given is a directory. See related question and answer: Using Node.js I get, "Error: EISDIR, read".
EISDIR当您尝试打开文件时发生错误，但给定的路径是一个目录。请参阅相关问答：使用 Node.js 我得到， "Error: EISDIR, read"。
To debug this I would log to console the variable directpathand I would assume that it is pointing to a directory, not a file. Correctly setting this variable to the intended path should solve your problem.
为了调试这个，我会登录到控制台变量directpath，我会假设它指向一个目录，而不是一个文件。将此变量正确设置为预期路径应该可以解决您的问题。
