package main import ( "crypto/rand" "encoding/base32" "log" "net/http" "strconv" "time" restful "github.com/emicklei/go-restful" "m.cluseau.fr/go/cow" ) type DownloadSpec struct { Kind string Name string Assets []string createdAt time.Time } func wsAuthorizeDownload(req *restful.Request, resp *restful.Response) { var spec DownloadSpec if err := req.ReadEntity(&spec); err != nil { wsError(resp, err) return } if spec.Kind == "" || spec.Name == "" || len(spec.Assets) == 0 { resp.WriteErrorString(http.StatusBadRequest, "missing data") return } randBytes := make([]byte, 32) _, err := rand.Read(randBytes) if err != nil { wsError(resp, err) return } token := base32.StdEncoding.WithPadding(base32.NoPadding).EncodeToString(randBytes) spec.createdAt = time.Now() wState.Change(func(v *State) { cow.MapSet(&v.Downloads, token, spec) }) log.Printf("download token created for %s %q, assets %q", spec.Kind, spec.Name, spec.Assets) resp.WriteAsJson(token) } func wsDownload(req *restful.Request, resp *restful.Response) { token := req.PathParameter("token") asset := req.PathParameter("asset") if token == "" || asset == "" { wsNotFound(resp) return } var spec DownloadSpec found := false wState.Change(func(v *State) { var ok bool spec, ok = v.Downloads[token] if !ok { return } newAssets := make([]string, 0, len(spec.Assets)) for _, a := range spec.Assets { if a == asset { found = true } else { newAssets = append(newAssets, a) } } if !found { wsNotFound(resp) return } cow.Map(&v.Downloads) if len(newAssets) == 0 { delete(v.Downloads, token) } else { spec.Assets = newAssets v.Downloads[token] = spec } }) if !found { wsNotFound(resp) return } log.Printf("download via token: %s %q asset %q", spec.Kind, spec.Name, asset) cfg, err := readConfig() if err != nil { wsError(resp, err) return } setHeader := func(ext string) { resp.AddHeader("Content-Disposition", "attachment; filename="+strconv.Quote(spec.Kind+"_"+spec.Name+"_"+asset+ext)) } switch spec.Kind { case "cluster": cluster := cfg.ClusterByName(spec.Name) if cluster == nil { wsNotFound(resp) return } switch asset { case "addons": setHeader(".yaml") resp.Write([]byte(cluster.Addons)) default: wsNotFound(resp) } case "host": host := cfg.Host(spec.Name) if host == nil { wsNotFound(resp) return } switch asset { case "config", "bootstrap-config": setHeader(".yaml") default: setHeader("") } renderHost(resp.ResponseWriter, req.Request, asset, host, cfg) default: wsNotFound(resp) } }