Remi Tricot-Le Breton 3d08236cb3 MINOR: cache: Prepare helper functions for Vary support ... The Vary functionality is based on a secondary key that needs to be calculated for every request to which a server answers with a Vary header. The Vary header, which can only be found in server responses, determines which headers of the request need to be taken into account in the secondary key. Since we do not want to have to store all the headers of the request until we have the response, we will pre-calculate as many sub-hashes as there are headers that we want to manage in a Vary context. We will only focus on a subset of headers which are likely to be mentioned in a Vary response (accept-encoding and referer for now). Every managed header will have its own normalization function which is in charge of transforming the header value into a core representation, more robust to insignificant changes that could exist between multiple clients. For instance, two accept-encoding values mentioning the same encodings but in different orders should give the same hash. This patch adds a function that parses a Vary header value and checks if all the values belong to our supported subset. It also adds the normalization functions for our two headers, as well as utility functions that can prebuild a secondary key for a given request and transform it into an actual secondary key after the vary signature is determined from the response.		2020-11-24 16:52:57 +01:00
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haproxy	MINOR: cache: Prepare helper functions for Vary support	2020-11-24 16:52:57 +01:00
import	MINOR: ist: Add istend() function to return a pointer to the end of the string	2020-11-05 19:25:12 +01:00