mirror of
https://github.com/IBM/fp-go.git
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73 lines
2.3 KiB
Go
73 lines
2.3 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 builder
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import (
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"bytes"
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"context"
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"net/http"
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"strconv"
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RIOE "github.com/IBM/fp-go/context/readerioeither"
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RIOEH "github.com/IBM/fp-go/context/readerioeither/http"
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E "github.com/IBM/fp-go/either"
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F "github.com/IBM/fp-go/function"
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R "github.com/IBM/fp-go/http/builder"
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H "github.com/IBM/fp-go/http/headers"
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LZ "github.com/IBM/fp-go/lazy"
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O "github.com/IBM/fp-go/option"
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)
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func Requester(builder *R.Builder) RIOEH.Requester {
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withBody := F.Curry3(func(data []byte, url string, method string) RIOE.ReaderIOEither[*http.Request] {
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return RIOE.TryCatch(func(ctx context.Context) func() (*http.Request, error) {
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return func() (*http.Request, error) {
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req, err := http.NewRequestWithContext(ctx, method, url, bytes.NewReader(data))
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if err == nil {
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req.Header.Set(H.ContentLength, strconv.Itoa(len(data)))
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H.Monoid.Concat(req.Header, builder.GetHeaders())
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}
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return req, err
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}
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})
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})
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withoutBody := F.Curry2(func(url string, method string) RIOE.ReaderIOEither[*http.Request] {
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return RIOE.TryCatch(func(ctx context.Context) func() (*http.Request, error) {
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return func() (*http.Request, error) {
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req, err := http.NewRequestWithContext(ctx, method, url, nil)
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if err == nil {
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H.Monoid.Concat(req.Header, builder.GetHeaders())
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}
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return req, err
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}
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})
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})
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return F.Pipe5(
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builder.GetBody(),
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O.Fold(LZ.Of(E.Of[error](withoutBody)), E.Map[error](withBody)),
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E.Ap[func(string) RIOE.ReaderIOEither[*http.Request]](builder.GetTargetURL()),
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E.Flap[error, RIOE.ReaderIOEither[*http.Request]](builder.GetMethod()),
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E.GetOrElse(RIOE.Left[*http.Request]),
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RIOE.Map(func(req *http.Request) *http.Request {
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req.Header = H.Monoid.Concat(req.Header, builder.GetHeaders())
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return req
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}),
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)
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}
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