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package handlers
import (
"encoding/json"
"net/http"
"github.com/docker/distribution"
"github.com/docker/distribution/registry/api/errcode"
v2 "github.com/docker/distribution/registry/api/v2"
"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
}
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) {
defer r.Body.Close()
tagService := th.Repository.Tags(th)
tags, err := tagService.All(th)
if err != nil {
switch err := err.(type) {
case distribution.ErrRepositoryUnknown:
th.Errors = append(th.Errors, v2.ErrorCodeNameUnknown.WithDetail(map[string]string{"name": th.Repository.Named().Name()}))
case errcode.Error:
th.Errors = append(th.Errors, err)
default:
th.Errors = append(th.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
}
return
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
enc := json.NewEncoder(w)
if err := enc.Encode(tagsAPIResponse{
Name: th.Repository.Named().Name(),
Tags: tags,
}); err != nil {
th.Errors = append(th.Errors, errcode.ErrorCodeUnknown.WithDetail(err))
return
}
}
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