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helm/pkg/getter/httpgetter.go

158 lines
3.9 KiB

/*
Copyright The Helm Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package getter
import (
"bytes"
"crypto/tls"
"io"
"net/http"
"net/url"
"sync"
"github.com/pkg/errors"
"helm.sh/helm/v3/internal/tlsutil"
"helm.sh/helm/v3/internal/urlutil"
"helm.sh/helm/v3/internal/version"
)
Spelling (#7258) * spelling: constraint Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: cryptographic Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: dependency Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: doesnot Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: don't Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: unexpected Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: dreadnought Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: default Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: envvars Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: evaluates Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: execute Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: extractor Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: frobnitz Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: generated Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: implementation Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: jabba Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: keywords Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: kubernetes Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: override Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: package Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: parsable Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: progress Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: recursively Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: release Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: cache Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: representing Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: serializer Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: subchart Signed-off-by: Josh Soref <jsoref@users.noreply.github.com> * spelling: utilities Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
5 years ago
// HTTPGetter is the default HTTP(/S) backend handler
type HTTPGetter struct {
opts options
transport *http.Transport
once sync.Once
}
// Get performs a Get from repo.Getter and returns the body.
func (g *HTTPGetter) Get(href string, options ...Option) (*bytes.Buffer, error) {
for _, opt := range options {
opt(&g.opts)
}
return g.get(href)
}
func (g *HTTPGetter) get(href string) (*bytes.Buffer, error) {
// Set a helm specific user agent so that a repo server and metrics can
// separate helm calls from other tools interacting with repos.
req, err := http.NewRequest(http.MethodGet, href, nil)
if err != nil {
return nil, err
}
req.Header.Set("User-Agent", version.GetUserAgent())
if g.opts.userAgent != "" {
req.Header.Set("User-Agent", g.opts.userAgent)
}
// Before setting the basic auth credentials, make sure the URL associated
// with the basic auth is the one being fetched.
u1, err := url.Parse(g.opts.url)
if err != nil {
return nil, errors.Wrap(err, "Unable to parse getter URL")
}
u2, err := url.Parse(href)
if err != nil {
return nil, errors.Wrap(err, "Unable to parse URL getting from")
}
// Host on URL (returned from url.Parse) contains the port if present.
// This check ensures credentials are not passed between different
// services on different ports.
if g.opts.passCredentialsAll || (u1.Scheme == u2.Scheme && u1.Host == u2.Host) {
if g.opts.username != "" && g.opts.password != "" {
req.SetBasicAuth(g.opts.username, g.opts.password)
}
}
client, err := g.httpClient()
if err != nil {
return nil, err
}
resp, err := client.Do(req)
if err != nil {
return nil, err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return nil, errors.Errorf("failed to fetch %s : %s", href, resp.Status)
}
buf := bytes.NewBuffer(nil)
_, err = io.Copy(buf, resp.Body)
return buf, err
}
// NewHTTPGetter constructs a valid http/https client as a Getter
func NewHTTPGetter(options ...Option) (Getter, error) {
var client HTTPGetter
for _, opt := range options {
opt(&client.opts)
}
return &client, nil
}
func (g *HTTPGetter) httpClient() (*http.Client, error) {
if g.opts.transport != nil {
return &http.Client{
Transport: g.opts.transport,
Timeout: g.opts.timeout,
}, nil
}
g.once.Do(func() {
g.transport = &http.Transport{
DisableCompression: true,
Proxy: http.ProxyFromEnvironment,
}
})
if (g.opts.certFile != "" && g.opts.keyFile != "") || g.opts.caFile != "" {
tlsConf, err := tlsutil.NewClientTLS(g.opts.certFile, g.opts.keyFile, g.opts.caFile)
if err != nil {
return nil, errors.Wrap(err, "can't create TLS config for client")
}
sni, err := urlutil.ExtractHostname(g.opts.url)
if err != nil {
return nil, err
}
tlsConf.ServerName = sni
g.transport.TLSClientConfig = tlsConf
}
if g.opts.insecureSkipVerifyTLS {
if g.transport.TLSClientConfig == nil {
g.transport.TLSClientConfig = &tls.Config{
InsecureSkipVerify: true,
}
} else {
g.transport.TLSClientConfig.InsecureSkipVerify = true
}
}
client := &http.Client{
Transport: g.transport,
Timeout: g.opts.timeout,
}
return client, nil
}