add middleware storage driver for redirect

Signed-off-by: Andrew Hsu <andrewhsu@acm.org> (github: andrewhsu)
This commit is contained in:
Andrew Hsu 2016-04-21 15:54:48 -07:00 committed by Andrew Hsu
parent 406d03bdb0
commit a691d82aee
2 changed files with 109 additions and 0 deletions

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package middleware
import (
"fmt"
"github.com/docker/distribution/context"
storagedriver "github.com/docker/distribution/registry/storage/driver"
storagemiddleware "github.com/docker/distribution/registry/storage/driver/middleware"
"net/url"
"strings"
)
type redirectStorageMiddleware struct {
storagedriver.StorageDriver
scheme string
host string
}
var _ storagedriver.StorageDriver = &redirectStorageMiddleware{}
func newRedirectStorageMiddleware(sd storagedriver.StorageDriver, options map[string]interface{}) (storagedriver.StorageDriver, error) {
o, ok := options["baseurl"]
if !ok {
return nil, fmt.Errorf("no baseurl provided")
}
b, ok := o.(string)
if !ok {
return nil, fmt.Errorf("baseurl must be a string")
}
if !strings.Contains(b, "://") {
b = "https://" + b
}
u, err := url.Parse(b)
if err != nil {
return nil, fmt.Errorf("invalid baseurl: %v", err)
}
return &redirectStorageMiddleware{StorageDriver: sd, scheme: u.Scheme, host: u.Host}, nil
}
func (r *redirectStorageMiddleware) URLFor(ctx context.Context, path string, options map[string]interface{}) (string, error) {
u := &url.URL{Scheme: r.scheme, Host: r.host, Path: path}
return u.String(), nil
}
func init() {
storagemiddleware.Register("redirect", storagemiddleware.InitFunc(newRedirectStorageMiddleware))
}

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package middleware
import (
check "gopkg.in/check.v1"
"testing"
)
func Test(t *testing.T) { check.TestingT(t) }
type MiddlewareSuite struct{}
var _ = check.Suite(&MiddlewareSuite{})
func (s *MiddlewareSuite) TestNoConfig(c *check.C) {
options := make(map[string]interface{})
_, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.ErrorMatches, "no baseurl provided")
}
func (s *MiddlewareSuite) TestDefaultScheme(c *check.C) {
options := make(map[string]interface{})
options["baseurl"] = "example.com"
middleware, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.Equals, nil)
m, ok := middleware.(*redirectStorageMiddleware)
c.Assert(ok, check.Equals, true)
c.Assert(m.scheme, check.Equals, "https")
c.Assert(m.host, check.Equals, "example.com")
}
func (s *MiddlewareSuite) TestHTTPS(c *check.C) {
options := make(map[string]interface{})
options["baseurl"] = "https://example.com"
middleware, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.Equals, nil)
m, ok := middleware.(*redirectStorageMiddleware)
c.Assert(ok, check.Equals, true)
c.Assert(m.scheme, check.Equals, "https")
c.Assert(m.host, check.Equals, "example.com")
url, err := middleware.URLFor(nil, "/rick/data", nil)
c.Assert(err, check.Equals, nil)
c.Assert(url, check.Equals, "https://example.com/rick/data")
}
func (s *MiddlewareSuite) TestHTTP(c *check.C) {
options := make(map[string]interface{})
options["baseurl"] = "http://example.com"
middleware, err := newRedirectStorageMiddleware(nil, options)
c.Assert(err, check.Equals, nil)
m, ok := middleware.(*redirectStorageMiddleware)
c.Assert(ok, check.Equals, true)
c.Assert(m.scheme, check.Equals, "http")
c.Assert(m.host, check.Equals, "example.com")
url, err := middleware.URLFor(nil, "morty/data", nil)
c.Assert(err, check.Equals, nil)
c.Assert(url, check.Equals, "http://example.com/morty/data")
}