github.com/jingleWang/moby@v1.13.1/distribution/registry.go (about)

     1  package distribution
     2  
     3  import (
     4  	"fmt"
     5  	"net"
     6  	"net/http"
     7  	"time"
     8  
     9  	"github.com/docker/distribution"
    10  	"github.com/docker/distribution/manifest/schema2"
    11  	distreference "github.com/docker/distribution/reference"
    12  	"github.com/docker/distribution/registry/client"
    13  	"github.com/docker/distribution/registry/client/auth"
    14  	"github.com/docker/distribution/registry/client/transport"
    15  	"github.com/docker/docker/api/types"
    16  	"github.com/docker/docker/dockerversion"
    17  	"github.com/docker/docker/registry"
    18  	"github.com/docker/go-connections/sockets"
    19  	"golang.org/x/net/context"
    20  )
    21  
    22  // ImageTypes represents the schema2 config types for images
    23  var ImageTypes = []string{
    24  	schema2.MediaTypeImageConfig,
    25  	// Handle unexpected values from https://github.com/docker/distribution/issues/1621
    26  	// (see also https://github.com/docker/docker/issues/22378,
    27  	// https://github.com/docker/docker/issues/30083)
    28  	"application/octet-stream",
    29  	"application/json",
    30  	"text/html",
    31  	// Treat defaulted values as images, newer types cannot be implied
    32  	"",
    33  }
    34  
    35  // PluginTypes represents the schema2 config types for plugins
    36  var PluginTypes = []string{
    37  	schema2.MediaTypePluginConfig,
    38  }
    39  
    40  var mediaTypeClasses map[string]string
    41  
    42  func init() {
    43  	// initialize media type classes with all know types for
    44  	// plugin
    45  	mediaTypeClasses = map[string]string{}
    46  	for _, t := range ImageTypes {
    47  		mediaTypeClasses[t] = "image"
    48  	}
    49  	for _, t := range PluginTypes {
    50  		mediaTypeClasses[t] = "plugin"
    51  	}
    52  }
    53  
    54  // NewV2Repository returns a repository (v2 only). It creates an HTTP transport
    55  // providing timeout settings and authentication support, and also verifies the
    56  // remote API version.
    57  func NewV2Repository(ctx context.Context, repoInfo *registry.RepositoryInfo, endpoint registry.APIEndpoint, metaHeaders http.Header, authConfig *types.AuthConfig, actions ...string) (repo distribution.Repository, foundVersion bool, err error) {
    58  	repoName := repoInfo.FullName()
    59  	// If endpoint does not support CanonicalName, use the RemoteName instead
    60  	if endpoint.TrimHostname {
    61  		repoName = repoInfo.RemoteName()
    62  	}
    63  
    64  	direct := &net.Dialer{
    65  		Timeout:   30 * time.Second,
    66  		KeepAlive: 30 * time.Second,
    67  		DualStack: true,
    68  	}
    69  
    70  	// TODO(dmcgowan): Call close idle connections when complete, use keep alive
    71  	base := &http.Transport{
    72  		Proxy:               http.ProxyFromEnvironment,
    73  		Dial:                direct.Dial,
    74  		TLSHandshakeTimeout: 10 * time.Second,
    75  		TLSClientConfig:     endpoint.TLSConfig,
    76  		// TODO(dmcgowan): Call close idle connections when complete and use keep alive
    77  		DisableKeepAlives: true,
    78  	}
    79  
    80  	proxyDialer, err := sockets.DialerFromEnvironment(direct)
    81  	if err == nil {
    82  		base.Dial = proxyDialer.Dial
    83  	}
    84  
    85  	modifiers := registry.DockerHeaders(dockerversion.DockerUserAgent(ctx), metaHeaders)
    86  	authTransport := transport.NewTransport(base, modifiers...)
    87  
    88  	challengeManager, foundVersion, err := registry.PingV2Registry(endpoint.URL, authTransport)
    89  	if err != nil {
    90  		transportOK := false
    91  		if responseErr, ok := err.(registry.PingResponseError); ok {
    92  			transportOK = true
    93  			err = responseErr.Err
    94  		}
    95  		return nil, foundVersion, fallbackError{
    96  			err:         err,
    97  			confirmedV2: foundVersion,
    98  			transportOK: transportOK,
    99  		}
   100  	}
   101  
   102  	if authConfig.RegistryToken != "" {
   103  		passThruTokenHandler := &existingTokenHandler{token: authConfig.RegistryToken}
   104  		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, passThruTokenHandler))
   105  	} else {
   106  		scope := auth.RepositoryScope{
   107  			Repository: repoName,
   108  			Actions:    actions,
   109  			Class:      repoInfo.Class,
   110  		}
   111  
   112  		creds := registry.NewStaticCredentialStore(authConfig)
   113  		tokenHandlerOptions := auth.TokenHandlerOptions{
   114  			Transport:   authTransport,
   115  			Credentials: creds,
   116  			Scopes:      []auth.Scope{scope},
   117  			ClientID:    registry.AuthClientID,
   118  		}
   119  		tokenHandler := auth.NewTokenHandlerWithOptions(tokenHandlerOptions)
   120  		basicHandler := auth.NewBasicHandler(creds)
   121  		modifiers = append(modifiers, auth.NewAuthorizer(challengeManager, tokenHandler, basicHandler))
   122  	}
   123  	tr := transport.NewTransport(base, modifiers...)
   124  
   125  	repoNameRef, err := distreference.ParseNamed(repoName)
   126  	if err != nil {
   127  		return nil, foundVersion, fallbackError{
   128  			err:         err,
   129  			confirmedV2: foundVersion,
   130  			transportOK: true,
   131  		}
   132  	}
   133  
   134  	repo, err = client.NewRepository(ctx, repoNameRef, endpoint.URL.String(), tr)
   135  	if err != nil {
   136  		err = fallbackError{
   137  			err:         err,
   138  			confirmedV2: foundVersion,
   139  			transportOK: true,
   140  		}
   141  	}
   142  	return
   143  }
   144  
   145  type existingTokenHandler struct {
   146  	token string
   147  }
   148  
   149  func (th *existingTokenHandler) Scheme() string {
   150  	return "bearer"
   151  }
   152  
   153  func (th *existingTokenHandler) AuthorizeRequest(req *http.Request, params map[string]string) error {
   154  	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", th.token))
   155  	return nil
   156  }