"hostname doesn't match" when using requests in PythonAnywhere

Question

EDIT: I fixed the problem, see links in the answer.

I'm using the XMLHttpRequest AJAX API to send data from different websites to our server in PythonAnywhere. Something odd happens: depending on the website, either we send successfully or we get this error

POST https://canecto.pythonanywhere.com/api/ 500 (Internal Server Error)

even though the same code is loaded. I tried to manually open the request and send data via JavaScript console in Chrome but nothing changes.

Here is how the snippet looks like:

var url = "https://canecto.pythonanywhere.com/api/";
var xmlHttpPost = new XMLHttpRequest();
xmlHttpPost.open("POST", url, true);
xmlHttpPost.setRequestHeader("Content-type", "application/json");

var postData = {
    page_url: window.location.href,
    time_on_page: activeTime,
    cookie: cookie,
    /* some variables */
};
xmlHttpPost.onreadystatechange = function() {
    if (xmlHttpPost.readyState == 4 && XMLHttpRequest.DONE) {
            console.log('');
    }
};

/* send data */
xmlHttpPost.send(JSON.stringify(postData));

I read here that the problem should not be the client-side JavaScript.

If I inspect on the server side, for the line requests.get(page_url, headers=HEADER, timeout=10)(where I try to access the page) I get this log:

I read on the Python request library that it may be something related to the SSL verification, but I have very little clue about it. I tried to check other similar questions but I have not found the answer.

Has anybody experienced anything similar and successfully solved it?

seems like I found something interesting in this answer but I need to check if works once installed the requirements. — Mattia Paterna
– Mattia Paterna, Commented May 22, 2017 at 9:19

Mattia Paterna · Accepted Answer · 2018-02-06 10:54:31Z

3

To whom it still uses Python < 2.7.9: this answer worked for me. SNI is not supported in Python 2, that means you should follow such answer and these requirements to make requests work with SSL certificate verification.

edited Feb 6, 2018 at 10:54

answered May 22, 2017 at 10:02

Mattia Paterna

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2 Comments

rschwieb Over a year ago

"these instructions" 404.

Mattia Paterna Over a year ago

@rschwieb unfortunately the url has gone, but I linked the comment where it had originated. There, you can find the requirements for it to work.

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