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Storj Labs Q2 townhall live coding
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| module demo | |
| go 1.14 | |
| require storj.io/uplink v1.0.3 |
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| package main | |
| import ( | |
| "context" | |
| "html/template" | |
| "io" | |
| "log" | |
| "net/http" | |
| "storj.io/uplink" | |
| ) | |
| const accessGrant = "<your-access-grant-goes-here>" | |
| const bucket = "<your-bucket-goes-here>" | |
| var rootPage = template.Must(template.New("root").Parse( | |
| `<!doctype html> | |
| <html> | |
| <body> | |
| <form method="post" enctype="multipart/form-data" action="/upload/"> | |
| <input type="file" name="file" /> | |
| <input type="submit" value="upload" /> | |
| </form> | |
| <ul> | |
| {{range .}} | |
| <li><a href="/serve/{{.}}">{{.}}</a></li> | |
| {{end}} | |
| </ul> | |
| </body> | |
| </html> | |
| `)) | |
| func handleErr(w http.ResponseWriter, err error) { | |
| http.Error(w, err.Error(), 500) | |
| log.Printf("error: %+v", err) | |
| } | |
| func main() { | |
| err := Main(context.Background()) | |
| if err != nil { | |
| panic(err) | |
| } | |
| } | |
| type Server struct { | |
| p *uplink.Project | |
| } | |
| func (s *Server) root(w http.ResponseWriter, r *http.Request) { | |
| ctx := r.Context() | |
| it := s.p.ListObjects(ctx, bucket, &uplink.ListObjectsOptions{ | |
| Recursive: true, | |
| }) | |
| var paths []string | |
| for it.Next() { | |
| paths = append(paths, it.Item().Key) | |
| } | |
| if err := it.Err(); err != nil { | |
| handleErr(w, err) | |
| return | |
| } | |
| rootPage.Execute(w, paths) | |
| } | |
| func (s *Server) upload(w http.ResponseWriter, r *http.Request) { | |
| ctx := r.Context() | |
| mr, err := r.MultipartReader() | |
| if err != nil { | |
| handleErr(w, err) | |
| return | |
| } | |
| for { | |
| part, err := mr.NextPart() | |
| if err != nil { | |
| if err == io.EOF { | |
| http.Redirect(w, r, "/", 303) | |
| return | |
| } | |
| handleErr(w, err) | |
| return | |
| } | |
| if part.FormName() != "file" { | |
| part.Close() | |
| continue | |
| } | |
| u, err := s.p.UploadObject(ctx, bucket, part.FileName(), nil) | |
| if err != nil { | |
| handleErr(w, err) | |
| return | |
| } | |
| _, err = io.Copy(u, part) | |
| if err != nil { | |
| handleErr(w, err) | |
| return | |
| } | |
| err = u.Commit() | |
| if err != nil { | |
| handleErr(w, err) | |
| return | |
| } | |
| part.Close() | |
| } | |
| } | |
| func (s *Server) serve(w http.ResponseWriter, r *http.Request) { | |
| ctx := r.Context() | |
| o, err := s.p.DownloadObject(ctx, bucket, r.URL.Path, nil) | |
| if err != nil { | |
| handleErr(w, err) | |
| return | |
| } | |
| defer o.Close() | |
| io.Copy(w, o) | |
| } | |
| func Main(ctx context.Context) error { | |
| ag, err := uplink.ParseAccess(accessGrant) | |
| if err != nil { | |
| return err | |
| } | |
| p, err := uplink.OpenProject(ctx, ag) | |
| if err != nil { | |
| return err | |
| } | |
| defer p.Close() | |
| server := &Server{p: p} | |
| mux := http.NewServeMux() | |
| mux.Handle("/", http.HandlerFunc(server.root)) | |
| mux.Handle("/upload/", http.HandlerFunc(server.upload)) | |
| mux.Handle("/serve/", http.StripPrefix("/serve/", http.HandlerFunc(server.serve))) | |
| return http.ListenAndServe(":8080", mux) | |
| } |
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