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feat(limit-count): add constant key type #5984

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merged 5 commits into from Jan 5, 2022
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spacewander
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See #5881 (comment)

Signed-off-by: spacewander spacewanderlzx@gmail.com

What this PR does / why we need it:

Pre-submission checklist:

  • Did you explain what problem does this PR solve? Or what new features have been added?
  • Have you added corresponding test cases?
  • Have you modified the corresponding document?
  • Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first

See apache#5881 (comment)

Signed-off-by: spacewander <spacewanderlzx@gmail.com>
@spacewander spacewander marked this pull request as ready for review December 31, 2021 10:25
@juzhiyuan
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cc @zaunist @leslie-tsang @guoqqqi to have a check 😄

Co-authored-by: Yu.Bozhong <y.bz@foxmail.com>
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@bisakhmondal bisakhmondal left a comment

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LGTM 👍

@@ -39,7 +39,7 @@ Limit request rate by a fixed number of requests in a given time window.
| ------------------- | ------- | --------------------------------------- | ------------- | ------------------------------------------------------------------------------------------------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| count | integer | required | | count > 0 | the specified number of requests threshold. |
| time_window | integer | required | | time_window > 0 | the time window in seconds before the request count is reset. |
| key_type | string | optional | "var" | ["var", "var_combination"] | the type of key. |
| key_type | string | optional | "var" | ["var", "var_combination", "constant"] | the type of key. |
| key | string | optional | "remote_addr" | | the user specified key to limit the rate. If the `key_type` is "var", the key will be treated as a name of variable. If the `key_type` is "var_combination", the key will be a combination of variables. For example, if we use "$remote_addr $consumer_name" as keys, plugin will be restricted by two keys which are "remote_addr" and "consumer_name". If the value of the key is empty, `remote_addr` will be set as the default key.|
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If possible, can we add a line here[L43] to document how the key will be interpreted when the key_type is constant?

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Addressed in the new commit

Signed-off-by: spacewander <spacewanderlzx@gmail.com>
Co-authored-by: Bisakh <bisakhmondal00@gmail.com>
Comment on lines +253 to +257
-- here we add a separator ':' to mark the boundary of the prefix and the key itself
if not conf.group then
key = key .. ctx.conf_type .. ctx.conf_version
key = ctx.conf_type .. ctx.conf_version .. ':' .. key
else
key = key .. conf.group
key = conf.group .. ':' .. key
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I wonder if we should add a note here to alert those who use the key to monitoring or something else.

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Could you give an example for the note?

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How about:

-- key format changed from `key*` to `*:key` for constant key type support

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Err...
I don't want to comment on all the changes in the code, unless it is something that affects public API. AFAIK, we don't describe the key format in the doc. So I think such change is just implementation details.

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Make Sense, leave the comment here should do the trick as well.

Signed-off-by: spacewander <spacewanderlzx@gmail.com>
@spacewander spacewander merged commit c6f1a83 into apache:master Jan 5, 2022
@spacewander spacewander deleted the lccc branch January 5, 2022 01:05
kyroslin pushed a commit to kyroslin/apisix that referenced this pull request Jan 5, 2022
Co-authored-by: Yu.Bozhong <y.bz@foxmail.com>
Co-authored-by: Bisakh <bisakhmondal00@gmail.com>
@spacewander spacewander mentioned this pull request Feb 18, 2022
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6 participants