// PUT http://localhost:8080/profiles/ahdkZXZ-ZmVkZXJhdGlvbi1zZXJ2aWNlc3IVCxIIcHJvZmlsZXMYgICAgICAgAoM
// {"first_name": "Ivan", "nick_name": "Socks", "last_name": "Hawkes"}
//
func (u *ProfileApi) update(r *restful.Request, w *restful.Response) {
c := appengine.NewContext(r.Request)
// Decode the request parameter to determine the key for the entity.
k, err := datastore.DecodeKey(r.PathParameter("profile-id"))
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
// Marshall the entity from the request into a struct.
p := new(Profile)
err = r.ReadEntity(&p)
if err != nil {
w.WriteError(http.StatusNotAcceptable, err)
return
}
// Retrieve the old entity from the datastore.
old := Profile{}
if err := datastore.Get(c, k, &old); err != nil {
if err.Error() == "datastore: no such entity" {
http.Error(w, err.Error(), http.StatusNotFound)
} else {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
return
}
// Check we own the profile before allowing them to update it.
// Optionally, return a 404 instead to help prevent guessing ids.
// TODO: Allow admins access.
if old.Email != user.Current(c).String() {
http.Error(w, "You do not have access to this resource", http.StatusForbidden)
return
}
// Since the whole entity is re-written, we need to assign any invariant fields again
// e.g. the owner of the entity.
p.Email = user.Current(c).String()
// Keep track of the last modification date.
p.LastModified = time.Now()
// Attempt to overwrite the old entity.
_, err = datastore.Put(c, k, p)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Let them know it succeeded.
w.WriteHeader(http.StatusNoContent)
}
// GET http://localhost:8080/profiles/ahdkZXZ-ZmVkZXJhdGlvbi1zZXJ2aWNlc3IVCxIIcHJvZmlsZXMYgICAgICAgAoM
//
func (u ProfileApi) read(r *restful.Request, w *restful.Response) {
c := appengine.NewContext(r.Request)
// Decode the request parameter to determine the key for the entity.
k, err := datastore.DecodeKey(r.PathParameter("profile-id"))
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
// Retrieve the entity from the datastore.
p := Profile{}
if err := datastore.Get(c, k, &p); err != nil {
if err.Error() == "datastore: no such entity" {
http.Error(w, err.Error(), http.StatusNotFound)
} else {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
return
}
// Check we own the profile before allowing them to view it.
// Optionally, return a 404 instead to help prevent guessing ids.
// TODO: Allow admins access.
if p.Email != user.Current(c).String() {
http.Error(w, "You do not have access to this resource", http.StatusForbidden)
return
}
w.WriteEntity(p)
}
// POST http://localhost:8080/profiles
// {"first_name": "Ivan", "nick_name": "Socks", "last_name": "Hawkes"}
//
func (u *ProfileApi) insert(r *restful.Request, w *restful.Response) {
c := appengine.NewContext(r.Request)
// Marshall the entity from the request into a struct.
p := new(Profile)
err := r.ReadEntity(&p)
if err != nil {
w.WriteError(http.StatusNotAcceptable, err)
return
}
// Ensure we start with a sensible value for this field.
p.LastModified = time.Now()
// The profile belongs to this user.
p.Email = user.Current(c).String()
k, err := datastore.Put(c, datastore.NewIncompleteKey(c, "profiles", nil), p)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// Let them know the location of the newly created resource.
// TODO: Use a safe Url path append function.
w.AddHeader("Location", u.Path+"/"+k.Encode())
// Return the resultant entity.
w.WriteHeader(http.StatusCreated)
w.WriteEntity(p)
}