Remove framework-specific route detection from collector middleware #251
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Sadly, with the benefit of hindsight, this wasn't a good idea.
There are two reasons we're dropping this:
- It doesn't play nicely with libraries like `Rack::Builder`, which
dispatches requests to different Rack apps based on a path prefix in
a way that isn't visible to middleware.
For example, when using `Rack::Builder`, `sinatra.route` only
contains the parts of the path after the prefix that `Rack::Builder`
used to dispatch to the specific app, and doesn't leave any
information in the request environment to indicate which prefix it
dispatched to.
- It turns out framework-specific route info isn't always formatted in
a way that looks good in a Prometheus label.
For example, when using regex-based route-matching in Sinatra, you
can end up with labels that look like `\\/vapes\\/([0-9]+)\\/?`.
For a really detailed dive into those two issues, see this GitHub
comment:
#249 (comment)
Signed-off-by: Chris Sinjakli <[email protected]>
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dmagliola
approved these changes
Mar 11, 2022
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Sure thing. Maybe a slight rearrange of this doc to emphasise that you can customise |
|
Yeah, that sounds perfect. |
Sinjo
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Signed-off-by: Chris Sinjakli <[email protected]>
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All done! |
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Sadly, with the benefit of hindsight, this wasn't a good idea.
There are two reasons we're dropping this:
It doesn't play nicely with libraries like
Rack::Builder, whichdispatches requests to different Rack apps based on a path prefix in
a way that isn't visible to middleware.
For example, when using
Rack::Builder,sinatra.routeonlycontains the parts of the path after the prefix that
Rack::Builderused to dispatch to the specific app, and doesn't leave any
information in the request environment to indicate which prefix it
dispatched to.
It turns out framework-specific route info isn't always formatted in
a way that looks good in a Prometheus label.
For example, when using regex-based route-matching in Sinatra, you
can end up with labels that look like
\\/vapes\\/([0-9]+)\\/?.For a really detailed dive into those two issues, see this GitHub
comment:
#249 (comment)
Fixes #249