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59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// Copyright (c) 2023 IBM Corp.
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// All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package headers
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import (
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"net/http"
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"net/textproto"
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A "github.com/IBM/fp-go/array"
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F "github.com/IBM/fp-go/function"
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L "github.com/IBM/fp-go/optics/lens"
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LA "github.com/IBM/fp-go/optics/lens/array"
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LRG "github.com/IBM/fp-go/optics/lens/record/generic"
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RG "github.com/IBM/fp-go/record/generic"
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)
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// HTTP headers
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const (
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Accept = "Accept"
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Authorization = "Authorization"
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ContentType = "Content-Type"
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ContentLength = "Content-Length"
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)
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var (
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// Monoid is a [M.Monoid] to concatenate [http.Header] maps
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Monoid = RG.UnionMonoid[http.Header](A.Semigroup[string]())
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// AtValues is a [L.Lens] that focusses on the values of a header
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AtValues = F.Flow2(
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textproto.CanonicalMIMEHeaderKey,
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LRG.AtRecord[http.Header, []string],
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)
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composeHead = F.Pipe1(
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LA.AtHead[string](),
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L.ComposeOptions[http.Header, string](A.Empty[string]()),
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)
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// AtValue is a [L.Lens] that focusses on first value of a header
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AtValue = F.Flow2(
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AtValues,
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composeHead,
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)
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)
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