Why is my xhr requests pending?

Question

I'm catching requests with HTTPServer and BaseHTTPRequestHandler

class Server(BaseHTTPRequestHandler):

def do_GET(self):
self.response(200, {
"Content-type": "text/html",
"Access-Control-Allow-Origin": "*"
})
self.write("success")

def write(self, text):
self.wfile.write(bytes(text, "utf-8"))

def response(self, code, headers):
self.send_response(int(code))
for key in headers:
self.send_header(key, headers[key])
self.end_headers()

server = HTTPServer(("localhost", 3000), Server)
server.serve_forever()

When viewed from browser it works perfectly.
But when sent with javascript it receives the requests but it doesn't send the response status which leaves the request hanging.

Answer 1

Okay so. The problem was that I had youtube open. Or if any other side is loading in a new tab. My internet shouldn't be that bad tho...

Answer 2

Nothing special about it

var xhttp = new XMLHttpRequest();
xhttp.onreadystatechange = function() {
if (this.readyState == 4 && this.status == 200) {
alert("success")
}
};
xhttp.open("GET", "http://localhost:3000", true);
xhttp.send();

Sometimes it success but with a huge delay

Answer 3

Python version: 3.6
windows 10
google chrome and edge

Last request delay 43 seconds.

Answer 4

Just for sure... Can you insert

self.wfile.flush()

at end of do_GET() ?

Answer 5

You have start serving?

server.serve_forever()

Answer 6

I presume that you have started serving because you have edited the code... Anyway, can you post the xhr code?

Answer 7

Strange... I have do some test and all worked normally...
Browser: Firefox 47.0.1 (used for either web and xhr request)
Python version: 3.6 on Windows 7 32b

Which are your specs?

Answer 8

😤😤😤

Answer 9

Hey but your connection is local, how you can get so mich delay? It dont depends on your internet connection