distribution/tags.go

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package registry
import (
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"encoding/json"
"net/http"
"github.com/docker/distribution/api/v2"
"github.com/docker/distribution/storage"
"github.com/gorilla/handlers"
)
// tagsDispatcher constructs the tags handler api endpoint.
func tagsDispatcher(ctx *Context, r *http.Request) http.Handler {
tagsHandler := &tagsHandler{
Context: ctx,
}
return handlers.MethodHandler{
"GET": http.HandlerFunc(tagsHandler.GetTags),
}
}
// tagsHandler handles requests for lists of tags under a repository name.
type tagsHandler struct {
*Context
}
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type tagsAPIResponse struct {
Name string `json:"name"`
Tags []string `json:"tags"`
}
// GetTags returns a json list of tags for a specific image name.
func (th *tagsHandler) GetTags(w http.ResponseWriter, r *http.Request) {
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defer r.Body.Close()
manifests := th.services.Manifests()
tags, err := manifests.Tags(th.Name)
if err != nil {
switch err := err.(type) {
case storage.ErrUnknownRepository:
w.WriteHeader(404)
th.Errors.Push(v2.ErrorCodeNameUnknown, map[string]string{"name": th.Name})
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default:
th.Errors.PushErr(err)
}
return
}
enc := json.NewEncoder(w)
if err := enc.Encode(tagsAPIResponse{
Name: th.Name,
Tags: tags,
}); err != nil {
th.Errors.PushErr(err)
return
}
}