Python Flask - tracking a request for logging purposes

Question

I'm not sure if I'm missing something obvious here as this appears like it would be a common issue.

I setup basic python logging to allow me add some debug during various parts of my Flask web service, but I realised if more than one request comes in at one time I won't know which request the logging pertains to.

How can I uniquely 'tag' each request that comes in, and modify the default logging format to include this tag?

Vinay Sajip · Accepted Answer · 2013-07-30 06:53:57Z

4

Here's a post about doing this sort of logging for web applications in general; the approach should work with Flask in particular (the post was written for Armin Ronacher).

tl; dr: Use thread-locals.

answered Jul 30, 2013 at 6:53

Vinay Sajip

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3 Comments

Markus Unterwaditzer Over a year ago

You should mention that the blogpost you linked was not written by Armin, you're just referring to a post by Armin. Also, just linking to a blogpost isn't actually a valid answer on stackoverflow. At least copy an example in here.

Vinay Sajip Over a year ago

I said it was written for Armin, so how could I be implying it was written by him? I'm not just referring to something Armin wrote, I provided an answer for this same question, which he posed. It's too long to post a simple example here, hence the link and tl;dr.

AndyC Over a year ago

It is a long post and a little more complex than I needed, but the principals behind it are applicable for my needs.

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