load: ignore context cancel error

[asjdf]

Describe the pull request

I recently noticed the error session: load: read: get: context canceled in my sentry panel.

I traced the error into this package and found that it will panic when the user closes the connection.

Actually, there are some fixes applied in line 188 but it is not enough.

Because the context canceled before the next handlers, I use c.ResponseWriter().WriteHeader(0) to end this handler chain.

By the way, I am looking forward flamego support the method like Abort() in gin to prevents pending handlers from being called.

Link to the issue: n/a

Checklist

• I agree to follow the Code of Conduct by submitting this pull request.
• I have read and acknowledged the Contributing guide.
• I have added test cases to cover the new code.

[asjdf]

@unknwon sorry to bother you, but do you have time to review this pr?

[unknwon]

Apologies for the delay, will take a look today!

[unknwon]

By the way, I am looking forward flamego support the method like Abort() in gin to prevents pending handlers from being called.

If I understand your ask correctly, you may want to look at https://flamego.dev/core-services.html#response-stream for how to archive that.

TL;DR as soon as a status code is being written, subsequent handlers won't be called.

[asjdf]

顺便说一下，我期待 flamego 支持像Abort()gin 中的方法，以防止挂起的处理程序被调用。

如果我正确理解您的问题，您可能需要查看https://flamego.dev/core-services.html#response-stream了解如何存档。

TL;DR 一旦写入状态代码，就不会调用后续处理程序。

I know about this feature, and that's why I added c.ResponseWriter().WriteHeader(0) to the code.

[asjdf]

I think there should be some problem with my modification, if you can explain the correct workflow, I can make a modification.

[unknwon]

I just committed a suggestion, I think things should work as expected now.

[unknwon]

Thanks for the PR!

[unknwon]

I'm gonna merge and release a new patch version. If you have any other suggestions that are not included, we can always work on a followup PR, since this one is purely beneficial.

[unknwon]

https://github.com/flamego/session/releases/tag/v1.2.2 has been created for this merge.

[asjdf]

Thanks for reviewing.
This blog seems to be misleading me https://neojos.com/blog/2018/03-17-http%E6%80%BB%E7%BB%93-%E7%8A%B6%E6%80%81%E7%A0%81/#0%E8%B6%85%E6%97%B6%E5%AE%A2%E6%88%B7%E7%AB%AF%E4%B8%BB%E5%8A%A8%E6%96%AD%E5%BC%80%E8%BF%9E%E6%8E%A5.