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116 lines
2.8 KiB
116 lines
2.8 KiB
/*
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Copyright The Helm 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 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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*/
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package getter
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import (
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"bytes"
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"io"
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"net/http"
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"github.com/pkg/errors"
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"helm.sh/helm/v3/internal/tlsutil"
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"helm.sh/helm/v3/internal/urlutil"
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"helm.sh/helm/v3/internal/version"
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)
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// HTTPGetter is the default HTTP(/S) backend handler
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type HTTPGetter struct {
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opts options
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}
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//Get performs a Get from repo.Getter and returns the body.
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func (g *HTTPGetter) Get(href string, options ...Option) (*bytes.Buffer, error) {
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for _, opt := range options {
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opt(&g.opts)
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}
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return g.get(href)
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}
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func (g *HTTPGetter) get(href string) (*bytes.Buffer, error) {
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buf := bytes.NewBuffer(nil)
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// Set a helm specific user agent so that a repo server and metrics can
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// separate helm calls from other tools interacting with repos.
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req, err := http.NewRequest("GET", href, nil)
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if err != nil {
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return buf, err
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}
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req.Header.Set("User-Agent", version.GetUserAgent())
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if g.opts.userAgent != "" {
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req.Header.Set("User-Agent", g.opts.userAgent)
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}
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if g.opts.username != "" && g.opts.password != "" {
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req.SetBasicAuth(g.opts.username, g.opts.password)
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}
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client, err := g.httpClient()
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if err != nil {
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return nil, err
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}
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resp, err := client.Do(req)
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if err != nil {
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return buf, err
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}
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if resp.StatusCode != 200 {
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return buf, errors.Errorf("failed to fetch %s : %s", href, resp.Status)
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}
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_, err = io.Copy(buf, resp.Body)
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resp.Body.Close()
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return buf, err
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}
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// NewHTTPGetter constructs a valid http/https client as a Getter
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func NewHTTPGetter(options ...Option) (Getter, error) {
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var client HTTPGetter
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for _, opt := range options {
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opt(&client.opts)
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}
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return &client, nil
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}
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func (g *HTTPGetter) httpClient() (*http.Client, error) {
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if (g.opts.certFile != "" && g.opts.keyFile != "") || g.opts.caFile != "" {
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tlsConf, err := tlsutil.NewClientTLS(g.opts.certFile, g.opts.keyFile, g.opts.caFile)
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if err != nil {
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return nil, errors.Wrap(err, "can't create TLS config for client")
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}
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tlsConf.BuildNameToCertificate()
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sni, err := urlutil.ExtractHostname(g.opts.url)
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if err != nil {
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return nil, err
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}
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tlsConf.ServerName = sni
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client := &http.Client{
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Transport: &http.Transport{
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TLSClientConfig: tlsConf,
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Proxy: http.ProxyFromEnvironment,
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},
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}
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return client, nil
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}
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return http.DefaultClient, nil
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}
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