func update_full_index(ctx appengine.Context, w http.ResponseWriter) {
// collect all packages into a single string (full index)
query := datastore.NewQuery("PackageMeta").Order("Name")
buf := bytes.NewBuffer(nil)
for it := query.Run(ctx); ; {
var meta gopm_index.PackageMeta
_, err := it.Next(&meta)
if err == datastore.Done {
break
}
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// serialize PackageMeta to json
json, err := meta.ToJson()
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
// append to the buffer
reader := bytes.NewReader(json)
written, err := io.Copy(buf, reader)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
if written != int64(len(json)) {
http.Error(w, fmt.Sprintf("Indexing package '%v' failed.", meta.Name), http.StatusInternalServerError)
return
}
// append a newline
io.Copy(buf, bytes.NewBuffer([]byte("\n")))
}
// store full index to a special place
index := &FullIndex{buf.Bytes()}
key := datastore.NewKey(ctx, "FullIndex", "full_index", 0, nil)
_, err := datastore.Put(ctx, key, index)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
}
func handler_publish(w http.ResponseWriter, r *http.Request) {
json := r.FormValue("pkg")
if json == "" {
http.Error(w, "Form value pkg is empty!", http.StatusBadRequest)
return
}
// unmarshal PackageMeta from json
meta := new(gopm_index.PackageMeta)
err := meta.FromJson([]byte(json))
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
// check name uniqueness in the database
ctx := appengine.NewContext(r)
key := datastore.NewKey(ctx, "PackageMeta", meta.Name, 0, nil)
entity := new(gopm_index.PackageMeta)
err = datastore.Get(ctx, key, entity)
if err == nil {
http.Error(w, fmt.Sprintf("The package name '%v' already exists in the index registry.\n", meta.Name), http.StatusInternalServerError)
return
}
if err != datastore.ErrNoSuchEntity {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
_, err = datastore.Put(ctx, key, meta)
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
update_full_index(ctx, w)
fmt.Printf("Published a package '%v'\n", meta.Name)
}