Android course catalog does not download data

[drewvolz]

The course catalog does not appear to download courses on android. iOS works fine.

[drewvolz]

I have an answer as to what is going on. Requests to stolaf.github.io redirect to stolaf.dev.

We are returned a 301 Moved Permanently response.

iOS is able to follow it, Android is not following the redirect.

[drewvolz]

So maybe it is not a redirect issue?

Normally, fetch transparently follows HTTP-redirects, like 301, 302 etc.
https://javascript.info/fetch-api#redirect

I am able to fix this locally by changing urls.ts

- export const COURSE_DATA_PAGE = 'https://stodevx.github.io/course-data/'
+ export const COURSE_DATA_PAGE = 'https://stolaf.dev/course-data/'

- export const INFO_PAGE = 'https://stodevx.github.io/course-data/info.json'
+ export const INFO_PAGE = 'https://stolaf.dev/course-data/info.json'

- export const GE_DATA = 'https://stodevx.github.io/course-data/data-lists/valid_gereqs.json'
+ export const GE_DATA = 'https://stolaf.dev/course-data/data-lists/valid_gereqs.json'

- export const DEPT_DATA = 'https://stodevx.github.io/course-data/data-lists/valid_departments.json'
+ export const DEPT_DATA = 'https://stolaf.dev/course-data/data-lists/valid_departments.json'

- export const TIMES_DATA = 'https://stodevx.github.io/course-data/data-lists/valid_times.json'
+ export const TIMES_DATA = 'https://stolaf.dev/course-data/data-lists/valid_times.json'

[hawkrives]

Is it an RN 0.68 issue? Since they ship the fetch-to-native shim…

[drewvolz]

Here are the networking issues for 0.68

Known Issues with fetch and cookie based authentication

The following options are currently not working with fetch

• redirect:manual
• credentials:omit

• Having same name headers on Android will result in only the latest one being present. A temporary solution can be found here: Fetch no longer returns all rows of the same-name response headers after RN Upgrade facebook/react-native#18837 (comment).
• Cookie based authentication is currently unstable. You can view some of the issues raised here: Cookie based authentication issues aggregation facebook/react-native#23185
• As a minimum on iOS, when redirected through a 302, if a Set-Cookie header is present, the cookie is not set properly. Since the redirect cannot be handled manually this might cause a scenario where infinite requests occur if the redirect is the result of an expired session.