func (server *Server) serveGraph(writer http.ResponseWriter, request *http.Request) {
graphID := strings.TrimPrefix(request.URL.Path, urlLibraryPath+"graphs/")
switch request.Method {
case "DELETE":
if graphID == "" {
server.serveResponse(writer, serverResponse{mesgMethodNotAllowed}, http.StatusMethodNotAllowed)
return
}
err := server.Library.DeleteItem(graphID, library.LibraryItemGraph)
if os.IsNotExist(err) {
server.serveResponse(writer, serverResponse{mesgResourceNotFound}, http.StatusNotFound)
return
} else if err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgUnhandledError}, http.StatusInternalServerError)
return
}
server.serveResponse(writer, nil, http.StatusOK)
case "GET", "HEAD":
if graphID == "" {
server.serveGraphList(writer, request)
return
}
item, err := server.Library.GetItem(graphID, library.LibraryItemGraph)
if os.IsNotExist(err) {
server.serveResponse(writer, serverResponse{mesgResourceNotFound}, http.StatusNotFound)
return
} else if err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgUnhandledError}, http.StatusInternalServerError)
return
}
server.serveResponse(writer, item, http.StatusOK)
case "POST", "PUT":
var graph *library.Graph
if response, status := server.parseStoreRequest(writer, request, graphID); status != http.StatusOK {
server.serveResponse(writer, response, status)
return
}
if request.Method == "POST" && request.FormValue("inherit") != "" {
// Get graph from library
item, err := server.Library.GetItem(request.FormValue("inherit"), library.LibraryItemGraph)
if os.IsNotExist(err) {
server.serveResponse(writer, serverResponse{mesgResourceNotFound}, http.StatusNotFound)
return
} else if err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgUnhandledError}, http.StatusInternalServerError)
return
}
graph = &library.Graph{}
utils.Clone(item.(*library.Graph), graph)
graph.ID = ""
} else {
// Create a new graph instance
graph = &library.Graph{Item: library.Item{ID: graphID}}
}
graph.Modified = time.Now()
// Parse input JSON for graph data
body, _ := ioutil.ReadAll(request.Body)
if err := json.Unmarshal(body, graph); err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgResourceInvalid}, http.StatusBadRequest)
return
}
err := server.Library.StoreItem(graph, library.LibraryItemGraph)
if response, status := server.parseError(writer, request, err); status != http.StatusOK {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, response, status)
return
}
if request.Method == "POST" {
writer.Header().Add("Location", strings.TrimRight(request.URL.Path, "/")+"/"+graph.ID)
server.serveResponse(writer, nil, http.StatusCreated)
} else {
server.serveResponse(writer, nil, http.StatusOK)
}
default:
server.serveResponse(writer, serverResponse{mesgMethodNotAllowed}, http.StatusMethodNotAllowed)
}
}
func (server *Server) serveGraph(writer http.ResponseWriter, request *http.Request) {
var graph *library.Graph
if request.Method != "GET" && request.Method != "HEAD" && server.Config.ReadOnly {
server.serveResponse(writer, serverResponse{mesgReadOnlyMode}, http.StatusForbidden)
return
}
graphID := routeTrimPrefix(request.URL.Path, urlLibraryPath+"graphs")
switch request.Method {
case "DELETE":
if graphID == "" {
server.serveResponse(writer, serverResponse{mesgMethodNotAllowed}, http.StatusMethodNotAllowed)
return
}
err := server.Library.DeleteItem(graphID, library.LibraryItemGraph)
if os.IsNotExist(err) {
server.serveResponse(writer, serverResponse{mesgResourceNotFound}, http.StatusNotFound)
return
} else if err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgUnhandledError}, http.StatusInternalServerError)
return
}
server.serveResponse(writer, nil, http.StatusOK)
case "GET", "HEAD":
if graphID == "" {
server.serveGraphList(writer, request)
return
}
item, err := server.Library.GetItem(graphID, library.LibraryItemGraph)
if os.IsNotExist(err) {
server.serveResponse(writer, serverResponse{mesgResourceNotFound}, http.StatusNotFound)
return
} else if err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgUnhandledError}, http.StatusInternalServerError)
return
}
server.serveResponse(writer, item, http.StatusOK)
case "POST", "PUT":
if response, status := server.parseStoreRequest(writer, request, graphID); status != http.StatusOK {
server.serveResponse(writer, response, status)
return
}
// Inheritance requested: clone an existing graph
if request.Method == "POST" && request.FormValue("inherit") != "" {
item, err := server.Library.GetItem(request.FormValue("inherit"), library.LibraryItemGraph)
if os.IsNotExist(err) {
server.serveResponse(writer, serverResponse{mesgResourceNotFound}, http.StatusNotFound)
return
} else if err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgUnhandledError}, http.StatusInternalServerError)
return
}
// Clone item
graph = &library.Graph{}
utils.Clone(item.(*library.Graph), graph)
// Reset item identifier
graph.ID = ""
} else {
// Create a new graph instance
graph = &library.Graph{Item: library.Item{ID: graphID}}
}
// Parse input JSON for graph data
body, _ := ioutil.ReadAll(request.Body)
if err := json.Unmarshal(body, graph); err != nil {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, serverResponse{mesgResourceInvalid}, http.StatusBadRequest)
return
}
// Check for graph type consistency (either a graph or an instance but not both)
if !graph.Template && (graph.Link != "" || len(graph.Attributes) > 0) &&
(graph.Description != "" || graph.Title != "" || graph.Type != 0 || graph.StackMode != 0 ||
graph.UnitType != 0 || graph.UnitLegend != "" || graph.Groups != nil) ||
graph.Template && (graph.Link != "" || len(graph.Attributes) > 0) {
server.serveResponse(writer, serverResponse{mesgResourceInvalid}, http.StatusBadRequest)
return
}
// Store graph item
err := server.Library.StoreItem(graph, library.LibraryItemGraph)
if response, status := server.parseError(writer, request, err); status != http.StatusOK {
logger.Log(logger.LevelError, "server", "%s", err)
server.serveResponse(writer, response, status)
return
}
if request.Method == "POST" {
writer.Header().Add("Location", strings.TrimRight(request.URL.Path, "/")+"/"+graph.ID)
server.serveResponse(writer, nil, http.StatusCreated)
} else {
server.serveResponse(writer, nil, http.StatusOK)
}
default:
server.serveResponse(writer, serverResponse{mesgMethodNotAllowed}, http.StatusMethodNotAllowed)
}
}
