DoRequests executes a list of requests in parallel.

InstrumentMiddleware can be inserted into the middleware chain to expose timing information.

Adapted from https://github.com/prometheus/client_golang/blob/4b158abea9470f75b6f07460cdc2189b91914562/api/prometheus/v1/api.go#L137.

MergeMiddlewares produces a middleware that applies multiple middleware in turn; ie Merge(f,g,h).Wrap(handler) == f.Wrap(g.Wrap(h.Wrap(handler))).

MergeResponse merges multiple Response into one.

NewEmptyPrometheusResponse returns an empty successful Prometheus query range response.

NewInstrumentMiddlewareMetrics makes a new InstrumentMiddlewareMetrics.

NewRoundTripper merges a set of middlewares into an handler, then inject it into the `next` roundtripper using the codec to translate requests and responses.

SubQueryStepSizeCheck ensures the query doesn't contain too small step size in subqueries.

Adapted from https://github.com/prometheus/client_golang/blob/4b158abea9470f75b6f07460cdc2189b91914562/api/prometheus/v1/api.go#L84.

InstrumentMiddlewareMetrics holds the metrics tracked by InstrumentMiddleware.

NoopCollector is a noop collector that can be used as placeholder when no metric should tracked by the instrumentation.

RequestResponse contains a request response and the respective request that was used.

Buffer can be used to read a response body.

Codec is used to encode/decode query range requests and responses so they can be passed down to middlewares.

Handler is like http.Handle, but specifically for Prometheus query_range calls.

Limits allows us to specify per-tenant runtime limits on the behavior of the query handling code.

Merger is used by middlewares making multiple requests to merge back all responses into a single one.

Middleware is a higher order Handler.

Request represents a query range request that can be process by middlewares.

Response represents a query range response.

HandlerFunc is like http.HandlerFunc, but for Handler.

MiddlewareFunc is like http.HandlerFunc, but for Middleware.

RoundTripFunc is to http.RoundTripper what http.HandlerFunc is to http.Handler.

Tripperware is a signature for all http client-side middleware.