fix(gatsby-source-medium): fix data fecthing & add limitation to readme

[sujinjoshi]

TL;DR

Fixes the issue but limited to latest 10 posts.

Description

Fixes the issue with medium.com cloudflare ddos protection by modifying the URL from https://medium.com/${nameOfBlogHere}/latest?format=json&limit=100 to https://medium.com/${nameOfBlogHere}?format=json as suggested by @biernacki here #17335 (comment)

Limitation

This workaround would limit the number of articles returned to 10. Hence, the plugin can't be used to display all the contents from medium blog. But it would be helpful if you are displaying only last n number of blogs (where n <= 10), which is I believe how most gatsby themes using this plugin are designed.

Related Issues

Fixes #17335

[EmaSuriano]

This change fixes the build problem but sadly it doesn't return the same amount of posts as in the initial request. Is there any alternative to log in into Medium in order to avoid the 403?

[wardpeet]

Thank you for taking a stab at this @sujinjoshi. I'm currently marking this as WIP as I like to get some more info on this #17335 (comment)

[LekoArts]

Let's close this PR as long as not a definite solution is found in which direction the plugin should be headed: #17335

[LekoArts]

LGTM from a technical standpoint, @gatsbyjs/learning should look at the README change.

[EmaSuriano]

Yeah, it seems that the team of Medium is not going to fix this issue and in the current state of the plugin, it doesn't work at all ...

[laurieontech]

Thanks for this additional information. Good to know the limitations. One minor grammar change but other than that looks good to me.

[wardpeet]

Sadly, this is the best we can do. Thanks a ton! 💯

[laurieontech]

Thanks for the dialogue on this everyone! Going to get this merged.

[Crayon-ShinChan]

I tested a medium account with 4 articles.gatsby-source-medium didn't return the number of articles it should have return. It just returned totalCount: 3, which should be 4. Additionally, I tested an account with 9 articles, it just returned 4 articles.

Then I tried to use https://medium.com/${nameOfBlogHere}/?format=json&limit=10. There were just 3 posts not 4. How can this happen?

[laurieontech]

@Crayon-ShinChan Can you please open a bug with as much duplication information as possible? Thank you.