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* #296 renamed configuration.json to ocelot.json in preparation * removed things we dont need for tests * another file we dont need * removed some async we dont need * refactoring to consolidate configuration code * removed another pointless abstraction * #296 started writing merge code * #296 coming up with ideas for this config merging * #296 still hacking this idea around * #296 will now do a crappy merge on the configuration * #296 change so tests pass on windows
41 lines
1.9 KiB
ReStructuredText
41 lines
1.9 KiB
ReStructuredText
Rate Limiting
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=============
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Thanks to `@catcherwong article <http://www.c-sharpcorner.com/article/building-api-gateway-using-ocelot-in-asp-net-core-rate-limiting-part-four/>`_ for inspiring me to finally write this documentation.
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Ocelot supports rate limiting of upstream requests so that your downstream services do not become overloaded. This feature was added by @geffzhang on GitHub! Thanks very much.
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OK so to get rate limiting working for a ReRoute you need to add the following json to it.
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.. code-block:: json
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"RateLimitOptions": {
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"ClientWhitelist": [],
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"EnableRateLimiting": true,
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"Period": "1s",
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"PeriodTimespan": 1,
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"Limit": 1
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}
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ClientWhitelist - This is an array that contains the whitelist of the client. It means that the client in this array will not be affected by the rate limiting.
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EnableRateLimiting - This value specifies enable endpoint rate limiting.
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Period - This value specifies the period, such as 1s, 5m, 1h,1d and so on.
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PeriodTimespan - This value specifies that we can retry after a certain number of seconds.
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Limit - This value specifies the maximum number of requests that a client can make in a defined period.
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You can also set the following in the GlobalConfiguration part of ocelot.json
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.. code-block:: json
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"RateLimitOptions": {
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"DisableRateLimitHeaders": false,
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"QuotaExceededMessage": "Customize Tips!",
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"HttpStatusCode": 999,
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"ClientIdHeader" : "Test"
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}
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DisableRateLimitHeaders - This value specifies whether X-Rate-Limit and Rety-After headers are disabled.
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QuotaExceededMessage - This value specifies the exceeded message.
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HttpStatusCode - This value specifies the returned HTTP Status code when rate limiting occurs.
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ClientIdHeader - Allows you to specifiy the header that should be used to identify clients. By default it is "ClientId"
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