60 lines
1.6 KiB
Go
60 lines
1.6 KiB
Go
package middleware
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import (
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"context"
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"fmt"
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"net/http"
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"net/url"
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"path"
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storagedriver "github.com/distribution/distribution/v3/registry/storage/driver"
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storagemiddleware "github.com/distribution/distribution/v3/registry/storage/driver/middleware"
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"github.com/sirupsen/logrus"
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)
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func init() {
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if err := storagemiddleware.Register("redirect", newRedirectStorageMiddleware); err != nil {
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logrus.Errorf("tailed to register redirect storage middleware: %v", err)
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}
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}
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type redirectStorageMiddleware struct {
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storagedriver.StorageDriver
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scheme string
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host string
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basePath string
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}
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var _ storagedriver.StorageDriver = &redirectStorageMiddleware{}
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func newRedirectStorageMiddleware(ctx context.Context, sd storagedriver.StorageDriver, options map[string]interface{}) (storagedriver.StorageDriver, error) {
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o, ok := options["baseurl"]
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if !ok {
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return nil, fmt.Errorf("no baseurl provided")
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}
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b, ok := o.(string)
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if !ok {
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return nil, fmt.Errorf("baseurl must be a string")
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}
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u, err := url.Parse(b)
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if err != nil {
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return nil, fmt.Errorf("unable to parse redirect baseurl: %s", b)
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}
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if u.Scheme == "" {
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return nil, fmt.Errorf("no scheme specified for redirect baseurl")
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}
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if u.Host == "" {
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return nil, fmt.Errorf("no host specified for redirect baseurl")
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}
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return &redirectStorageMiddleware{StorageDriver: sd, scheme: u.Scheme, host: u.Host, basePath: u.Path}, nil
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}
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func (r *redirectStorageMiddleware) RedirectURL(_ *http.Request, urlPath string) (string, error) {
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if r.basePath != "" {
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urlPath = path.Join(r.basePath, urlPath)
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}
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u := &url.URL{Scheme: r.scheme, Host: r.host, Path: urlPath}
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return u.String(), nil
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}
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