65 lines
1.7 KiB
Go
65 lines
1.7 KiB
Go
/*
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Copyright 2023 The Dapr Authors
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 implieout.
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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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*/
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package wasm
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import (
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"context"
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"fmt"
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"io"
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"net/http"
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"net/url"
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)
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// httpClient decorates an http.Client with convenience methods.
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type httpClient struct {
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c http.Client
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}
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// newHTTPFetcher is a constructor for httpFetcher.
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//
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// It is possible to plug a custom http.RoundTripper to handle other concerns (e.g. retries)
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// Compression is handled transparently and automatically by http.Client.
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func newHTTPCLient(transport http.RoundTripper) *httpClient {
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return &httpClient{
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c: http.Client{Transport: transport},
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}
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}
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// fetch returns a byte slice of the wasm module found at the given URL, or an error otherwise.
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func (f *httpClient) get(ctx context.Context, u *url.URL) ([]byte, error) {
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req, err := http.NewRequestWithContext(ctx, http.MethodGet, u.String(), nil)
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if err != nil {
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return nil, err
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}
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resp, err := f.c.Do(req.WithContext(ctx))
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if err != nil {
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return nil, err
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}
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if resp.StatusCode != http.StatusOK {
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io.Copy(io.Discard, resp.Body)
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resp.Body.Close()
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return nil, fmt.Errorf("received %v status code from %q", resp.StatusCode, u)
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}
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bytes, err := io.ReadAll(resp.Body)
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resp.Body.Close()
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if err != nil {
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return nil, err
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}
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return bytes, nil
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}
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