Ejemplo n.º 1
0
// GET: /node/{id}
// ToDo: clean up this function. About to get unmanageable
func (cr *NodeController) Read(id string, cx *goweb.Context) {
	// Log Request and check for Auth
	LogRequest(cx.Request)
	u, err := AuthenticateRequest(cx.Request)
	if err != nil && err.Error() != e.NoAuth {
		handleAuthError(err, cx)
		return
	}

	// Fake public user
	if u == nil {
		if conf.ANON_READ {
			u = &user.User{Uuid: ""}
		} else {
			cx.RespondWithErrorMessage(e.NoAuth, http.StatusUnauthorized)
			return
		}
	}

	// Gather query params
	query := &Query{list: cx.Request.URL.Query()}

	var fFunc filter.FilterFunc = nil
	if query.Has("filter") {
		if filter.Has(query.Value("filter")) {
			fFunc = filter.Filter(query.Value("filter"))
		}
	}

	// Load node and handle user unauthorized
	node, err := store.LoadNode(id, u.Uuid)
	if err != nil {
		if err.Error() == e.UnAuth {
			cx.RespondWithError(http.StatusUnauthorized)
			return
		} else if err.Error() == e.MongoDocNotFound {
			cx.RespondWithNotFound()
			return
		} else {
			// In theory the db connection could be lost between
			// checking user and load but seems unlikely.
			log.Error("Err@node_Read:LoadNode: " + err.Error())
			cx.RespondWithError(http.StatusInternalServerError)
			return
		}
	}

	// Switch though param flags
	// ?download=1
	if query.Has("download") {
		if !node.HasFile() {
			cx.RespondWithErrorMessage("File not found", http.StatusBadRequest)
			return
		}

		//_, chunksize :=
		// ?index=foo
		if query.Has("index") {
			//handling bam file
			if query.Value("index") == "bai" {
				s := &streamer{rs: []store.SectionReader{}, ws: cx.ResponseWriter, contentType: "application/octet-stream", filename: node.Id, size: node.File.Size, filter: fFunc}

				var region string

				if query.Has("region") {
					//retrieve alingments overlapped with specified region
					region = query.Value("region")
				}

				argv, err := ParseSamtoolsArgs(query)
				if err != nil {
					cx.RespondWithErrorMessage("Invaid args in query url", http.StatusBadRequest)
					return
				}

				err = s.stream_samtools(node.FilePath(), region, argv...)
				if err != nil {
					cx.RespondWithErrorMessage("error while involking samtools", http.StatusBadRequest)
					return
				}

				return
			}

			// if forgot ?part=N
			if !query.Has("part") {
				cx.RespondWithErrorMessage("Index parameter requires part parameter", http.StatusBadRequest)
				return
			}
			// open file
			r, err := node.FileReader()
			if err != nil {
				log.Error("Err@node_Read:Open: " + err.Error())
				cx.RespondWithError(http.StatusInternalServerError)
				return
			}
			// load index
			idx, err := node.Index(query.Value("index"))
			if err != nil {
				cx.RespondWithErrorMessage("Invalid index", http.StatusBadRequest)
				return
			}

			if idx.Type() == "virtual" {
				csize := int64(1048576)
				if query.Has("chunksize") {
					csize, err = strconv.ParseInt(query.Value("chunksize"), 10, 64)
					if err != nil {
						cx.RespondWithErrorMessage("Invalid chunksize", http.StatusBadRequest)
						return
					}
				}
				idx.Set(map[string]interface{}{"ChunkSize": csize})
			}
			var size int64 = 0
			s := &streamer{rs: []store.SectionReader{}, ws: cx.ResponseWriter, contentType: "application/octet-stream", filename: node.Id, filter: fFunc}
			for _, p := range query.List("part") {
				pos, length, err := idx.Part(p)
				if err != nil {
					cx.RespondWithErrorMessage("Invalid index part", http.StatusBadRequest)
					return
				}
				size += length
				s.rs = append(s.rs, io.NewSectionReader(r, pos, length))
			}
			s.size = size
			err = s.stream()
			if err != nil {
				// causes "multiple response.WriteHeader calls" error but better than no response
				cx.RespondWithErrorMessage(err.Error(), http.StatusBadRequest)
				log.Error("err: " + err.Error())
			}
		} else { //!query.Has("index")
			nf, err := node.FileReader()
			if err != nil {
				// File not found or some sort of file read error.
				// Probably deserves more checking
				log.Error("err " + err.Error())
				cx.RespondWithError(http.StatusBadRequest)
				return
			}
			s := &streamer{rs: []store.SectionReader{nf}, ws: cx.ResponseWriter, contentType: "application/octet-stream", filename: node.Id, size: node.File.Size, filter: fFunc}
			err = s.stream()
			if err != nil {
				// causes "multiple response.WriteHeader calls" error but better than no response
				cx.RespondWithErrorMessage(err.Error(), http.StatusBadRequest)
				log.Error("err " + err.Error())
			}
		}
		return
	} else if query.Has("pipe") {
		cx.RespondWithError(http.StatusNotImplemented)
	} else if query.Has("list") {
		cx.RespondWithError(http.StatusNotImplemented)
	} else {
		// Base case respond with node in json
		cx.RespondWithData(node)
	}
}
Ejemplo n.º 2
0
// GET: /node/{id}
// ToDo: clean up this function. About to get unmanageable
func (cr *NodeController) Read(id string, cx *goweb.Context) {
	// Log Request and check for Auth
	LogRequest(cx.Request)
	u, err := AuthenticateRequest(cx.Request)
	if err != nil {
		// No Auth is not damning. Other errors are probably a dead db connection
		if err.Error() != e.NoAuth {
			if err.Error() == e.MongoDocNotFound {
				cx.RespondWithErrorMessage("Invalid username or password", http.StatusBadRequest)
				return
			} else {
				fmt.Println("Error at Auth:", err.Error())
				cx.RespondWithError(http.StatusInternalServerError)
				return
			}
		}
	}

	// Fake public user
	if u == nil {
		u = &user.User{Uuid: ""}
	}

	// Gather query params
	query := &Query{list: cx.Request.URL.Query()}

	var fFunc filter.FilterFunc = nil
	if query.Has("filter") {
		if filter.Has(query.Value("filter")) {
			fFunc = filter.Filter(query.Value("filter"))
		}
	}

	// Load node and handle user unauthorized
	node, err := store.LoadNode(id, u.Uuid)
	if err != nil {
		if err.Error() == e.UnAuth {
			fmt.Println("Unauthorized")
			cx.RespondWithError(http.StatusUnauthorized)
			return
		} else if err.Error() == e.MongoDocNotFound {
			cx.RespondWithNotFound()
			return
		} else {
			// In theory the db connection could be lost between
			// checking user and load but seems unlikely.
			fmt.Println("Err@node_Read:LoadNode:", err.Error())
			cx.RespondWithError(http.StatusInternalServerError)
			return
		}
	}

	// Switch though param flags
	// ?download=1
	if query.Has("download") {
		if !node.HasFile() {
			cx.RespondWithErrorMessage("node file not found", http.StatusBadRequest)
			return
		}

		//_, chunksize :=
		// ?index=foo
		if query.Has("index") {
			// if forgot ?part=N
			if !query.Has("part") {
				cx.RespondWithErrorMessage("Index parameter requires part parameter", http.StatusBadRequest)
				return
			}
			// open file
			r, err := os.Open(node.DataPath())
			defer r.Close()
			if err != nil {
				fmt.Println("Err@node_Read:Open:", err.Error())
				cx.RespondWithError(http.StatusInternalServerError)
				return
			}
			// load index
			idx, err := node.Index(query.Value("index"))
			if err != nil {
				cx.RespondWithErrorMessage("Invalid index", http.StatusBadRequest)
				return
			}
			if idx.Type() == "virtual" {
				csize := int64(1048576)
				if query.Has("chunksize") {
					csize, err = strconv.ParseInt(query.Value("chunksize"), 10, 64)
					if err != nil {
						cx.RespondWithErrorMessage("Invalid chunksize", http.StatusBadRequest)
						return
					}
				}
				idx.Set(map[string]interface{}{"ChunkSize": csize})
			}
			var size int64 = 0
			s := &streamer{rs: []io.ReadCloser{}, ws: cx.ResponseWriter, contentType: "application/octet-stream", filename: node.Id, filter: fFunc}
			for _, p := range query.List("part") {
				pos, length, err := idx.Part(p)
				if err != nil {
					cx.RespondWithErrorMessage("Invalid index part", http.StatusBadRequest)
					return
				}
				size += length
				s.rs = append(s.rs, NewSectionReaderCloser(r, pos, length))
			}
			s.size = size
			err = s.stream()
			if err != nil {
				// fix
				fmt.Println("err", err.Error())
			}
		} else {
			nf, err := os.Open(node.DataPath())
			if err != nil {
				// File not found or some sort of file read error.
				// Probably deserves more checking
				fmt.Println("err", err.Error())
				cx.RespondWithError(http.StatusBadRequest)
				return
			}
			s := &streamer{rs: []io.ReadCloser{nf}, ws: cx.ResponseWriter, contentType: "application/octet-stream", filename: node.Id, size: node.File.Size, filter: fFunc}
			err = s.stream()
			if err != nil {
				// fix
				fmt.Println("err", err.Error())
			}
		}
		return
	} else if query.Has("pipe") {
		cx.RespondWithError(http.StatusNotImplemented)
	} else if query.Has("list") {
		cx.RespondWithError(http.StatusNotImplemented)
	} else {
		// Base case respond with node in json
		cx.RespondWithData(node)
	}
}