requests not working in Firefox · Issue #22 · koenvo/pyodide-http · GitHub

I've been trying to get the basic example to work in Jupyterlite, just changing micropip to instead use the %pip magic:

%pip install -q pyodide-http requests

import pyodide_http
pyodide_http.patch_all()  # Patch all libraries

import requests
response = requests.get('http://raw.githubusercontent.com/statsbomb/open-data/master/data/lineups/15946.json')

The cells run without errors, but the response object has a status code of 0, and response.content is empty. Am I missing something?

The result is the same running locally using jupyter lite serve, and on GitHub Pages.

Hmm there seems to be an issue with redirects. Can you try with https:// instead of http:// ?

That didn't seem to make any difference, but I had a look in the browser console and saw this:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://raw.githubusercontent.com/statsbomb/open-data/master/data/lineups/15946.json. (Reason: CORS request did not succeed). Status code: (null).

Failed to load ‘https://raw.githubusercontent.com/statsbomb/open-data/master/data/lineups/15946.json’. A ServiceWorker passed a promise to FetchEvent.respondWith() that rejected with ‘TypeError: NetworkError when attempting to fetch resource.’.

Also seeing something similar (status code 0) when trying out the following code snippet in jupyterlite/jupyterlite#940:

%pip install seaborn
import pyodide_http
pyodide_http.patch_all()

import seaborn as sns

# Load an example dataset
tips = sns.load_dataset("tips")

Thanks for the report!

What browser did you use? I'm getting a JsException: NetworkError: Failed to execute 'send' on 'XMLHttpRequest': Failed to load 'https://github.com/mwaskom/seaborn-data'. error in Chrome on MacOS.

It was with Firefox 108 with the following error:

Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://github.com/mwaskom/seaborn-data. (Reason: CORS request did not succeed). Status code: (null

Seeing the same here:

console output:

Firefox 111.0.1 (64-bit)

This might be an issue with the Pyodide FFI pyodide/pyodide#1653 where the exception isn't passed properly

Seeing the same here:

console output:

Firefox 111.0.1 (64-bit)

Just installed Firefox and I do get the same error as you get. When I do a manual request using

from js import XMLHttpRequest
xhr = XMLHttpRequest.new()
url = "https://raw.githubusercontent.com/statsbomb/open-data/master/data/lineups/15946.json"
xhr.overrideMimeType("text/plain; charset=ISO-8859-15")
xhr.open('GET', url, False)
xhr.send()
body = xhr.response.encode("ISO-8859-15")

it seems to work fine.

Maybe it's something with some headers requests is adding. Lets dig into this.

[edit1]

Got a failing minimal example

[edit2]

Hah! It's the 'User-Agent' header. Let me do some additional testing

[edit3]

It seems to be related to https://bugzilla.mozilla.org/show_bug.cgi?id=1629921

I just released version 0.2.1 with a fix for this issue.

@wragge @dazzag24 can you also verify it works for you?

@jtpio your issue with seaborn is fixed when mwaskom/seaborn#3234 is released.

Confirming that my basic example now works. Thanks!

Thanks for both reporting this bug and testing the fix!

Works for me now:

Many thanks

requests not working in Firefox · Issue #22 · koenvo/pyodide-http · GitHub

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requests not working in Firefox #22

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requests not working in Firefox · Issue #22 · koenvo/pyodide-http · GitHub

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requests not working in Firefox #22

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koenvo commented on Dec 14, 2022

wragge commented on Dec 14, 2022

jtpio commented on Jan 3, 2023

koenvo commented on Jan 3, 2023

jtpio commented on Jan 4, 2023

dazzag24 commented on Mar 30, 2023

rth commented on Mar 30, 2023

koenvo commented on Mar 30, 2023

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koenvo commented on Mar 30, 2023

wragge commented on Apr 2, 2023

koenvo commented on Apr 2, 2023

dazzag24 commented on Apr 2, 2023

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