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DOC: internal: filters: fix reference to entities.pdf
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In doc/internals/api/filters.txt was the referece to
doc/internals/entities.pdf which was delteted in the
past.
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@wtarreau
Aleksandar Lazic authored and wtarreau committed Oct 23, 2023
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4 changes: 3 additions & 1 deletion doc/internals/api/filters.txt
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Expand Up @@ -47,7 +47,9 @@ SUMMARY
First of all, to fully understand how filters work and how to create one, it is
best to know, at least from a distance, what is a proxy (frontend/backend), a
stream and a channel in HAProxy and how these entities are linked to each other.
doc/internals/entities.pdf is a good overview.
In doc/internals/api/layers.txt is a good overview of the different layers in
HAProxy and in doc/internals/muxes.pdf is described the flow between the
different muxes.

Then, to support filters, many callbacks has been added to HAProxy at different
places, mainly around channel analyzers. Their purpose is to allow filters to
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