github.com/darkowlzz/helm@v2.5.1-0.20171213183701-6707fe0468d4+incompatible/pkg/getter/httpgetter.go (about)

     1  /*
     2  Copyright 2016 The Kubernetes Authors All rights reserved.
     3  Licensed under the Apache License, Version 2.0 (the "License");
     4  you may not use this file except in compliance with the License.
     5  You may obtain a copy of the License at
     6  
     7  http://www.apache.org/licenses/LICENSE-2.0
     8  
     9  Unless required by applicable law or agreed to in writing, software
    10  distributed under the License is distributed on an "AS IS" BASIS,
    11  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  See the License for the specific language governing permissions and
    13  limitations under the License.
    14  */
    15  
    16  package getter
    17  
    18  import (
    19  	"bytes"
    20  	"fmt"
    21  	"io"
    22  	"net/http"
    23  	"strings"
    24  
    25  	"k8s.io/helm/pkg/tlsutil"
    26  	"k8s.io/helm/pkg/urlutil"
    27  	"k8s.io/helm/pkg/version"
    28  )
    29  
    30  //httpGetter is the efault HTTP(/S) backend handler
    31  type httpGetter struct {
    32  	client *http.Client
    33  }
    34  
    35  //Get performs a Get from repo.Getter and returns the body.
    36  func (g *httpGetter) Get(href string) (*bytes.Buffer, error) {
    37  	buf := bytes.NewBuffer(nil)
    38  
    39  	// Set a helm specific user agent so that a repo server and metrics can
    40  	// separate helm calls from other tools interacting with repos.
    41  	req, err := http.NewRequest("GET", href, nil)
    42  	if err != nil {
    43  		return buf, err
    44  	}
    45  	req.Header.Set("User-Agent", "Helm/"+strings.TrimPrefix(version.GetVersion(), "v"))
    46  
    47  	resp, err := g.client.Do(req)
    48  	if err != nil {
    49  		return buf, err
    50  	}
    51  	if resp.StatusCode != 200 {
    52  		return buf, fmt.Errorf("Failed to fetch %s : %s", href, resp.Status)
    53  	}
    54  
    55  	_, err = io.Copy(buf, resp.Body)
    56  	resp.Body.Close()
    57  	return buf, err
    58  }
    59  
    60  // newHTTPGetter constructs a valid http/https client as Getter
    61  func newHTTPGetter(URL, CertFile, KeyFile, CAFile string) (Getter, error) {
    62  	var client httpGetter
    63  	if CertFile != "" && KeyFile != "" {
    64  		tlsConf, err := tlsutil.NewClientTLS(CertFile, KeyFile, CAFile)
    65  		if err != nil {
    66  			return nil, fmt.Errorf("can't create TLS config for client: %s", err.Error())
    67  		}
    68  		tlsConf.BuildNameToCertificate()
    69  
    70  		sni, err := urlutil.ExtractHostname(URL)
    71  		if err != nil {
    72  			return nil, err
    73  		}
    74  		tlsConf.ServerName = sni
    75  
    76  		client.client = &http.Client{
    77  			Transport: &http.Transport{
    78  				TLSClientConfig: tlsConf,
    79  			},
    80  		}
    81  	} else {
    82  		client.client = http.DefaultClient
    83  	}
    84  	return &client, nil
    85  }