Upgrade to flask 2

[corenting]

I noticed in issue #1759 that the flask version was pinned to the 1.x branch to fix compatibility issues. This PR introduces the necessary changes to bump Flask and werkzeug to version 2.x .

[cyberw]

Cool stuff! Right now there is just so much more flask 1.x running out there (that people might be running in the same env as locust or inside locust), so I dont think we want to merge this right now, but it is nice to know we can.

[corenting]

Cool stuff! Right now there is just so much more flask 1.x running out there (that people might be running in the same env as locust or inside locust), so I dont think we want to merge this right now, but it is nice to know we can.

Thanks for the feedback :) Maybe I can add conditions to see which version of Flask is used and adapt the changes depending on this, to allow running with both Flask 1.x and Flask 2.x ?

[cyberw]

Thanks for the feedback :) Maybe I can add conditions to see which version of Flask is used and adapt the changes depending on this, to allow running with both Flask 1.x and Flask 2.x ?

That would be nice. We'd still have to depend on 1.x in setup.py, but I guess it might still be useful for some people.

[cyberw]

Actually, I'm thinking about making a 2.0 release soon and it makes total sense to update flask at the same time. can you fix the formatting errors though?

[corenting]

Actually, I'm thinking about making a 2.0 release soon and it makes total sense to update flask at the same time. can you fix the formatting errors though?

Sure ! I just pushed an update with formatting fixed. I didn't have time to verify the tests though, but look like they are OK on the CI.

[jjin-ut]

Thanks for the PR. I ran into this error just now when I try to run locust.

app.jinja_options["extensions"].append("jinja2.ext.do")
KeyError: 'extensions'

It was working for me a few hours ago, then all in sudden ran into this error. Nothing has changed on my side.
When is this PR going to be released? Hope it will fix the issue.

[cyberw]

Thanks for the PR. I ran into this error just now when I try to run locust.

app.jinja_options["extensions"].append("jinja2.ext.do")
KeyError: 'extensions'

It was working for me a few hours ago, then all in sudden ran into this error. Nothing has changed on my side.
When is this PR going to be released? Hope it will fix the issue.

I want to do this in 2.0, because it may be a breaking change for some people. Locust 1.5.3 uses a pinned 1.x version of Flask, so you shouldnt have this issue?

[jjin-ut]

Thanks for the PR. I ran into this error just now when I try to run locust.

app.jinja_options["extensions"].append("jinja2.ext.do")
KeyError: 'extensions'

It was working for me a few hours ago, then all in sudden ran into this error. Nothing has changed on my side.
When is this PR going to be released? Hope it will fix the issue.

I want to do this in 2.0, because it may be a breaking change for some people. Locust 1.5.3 uses a pinned 1.x version of Flask, so you shouldnt have this issue?

Ah my locust is 1.4.4. I'll update and see if it works. Thank you!

[jjin-ut]

Thanks for the PR. I ran into this error just now when I try to run locust.

app.jinja_options["extensions"].append("jinja2.ext.do")
KeyError: 'extensions'

It was working for me a few hours ago, then all in sudden ran into this error. Nothing has changed on my side.
When is this PR going to be released? Hope it will fix the issue.

I want to do this in 2.0, because it may be a breaking change for some people. Locust 1.5.3 uses a pinned 1.x version of Flask, so you shouldnt have this issue?

update to 1.5.3 fixed my problem. Thank you!