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focalboard/server/main/main.go
2020-10-09 10:27:04 -07:00

418 lines
10 KiB
Go

package main
import (
"encoding/json"
"flag"
"io/ioutil"
"mime/multipart"
"path/filepath"
"strings"
"syscall"
"time"
"fmt"
"log"
"net/http"
"os"
"os/signal"
"github.com/gorilla/mux"
)
var wsServer *WSServer
var config *Configuration
// WebsocketMsg is send on block changes
type WebsocketMsg struct {
Action string `json:"action"`
BlockID string `json:"blockId"`
}
// A single session for now
var session = new(ListenerSession)
var upgrader = websocket.Upgrader{
CheckOrigin: func(r *http.Request) bool {
return true
},
}
// ----------------------------------------------------------------------------------------------------
// HTTP handlers
func serveWebFile(w http.ResponseWriter, r *http.Request, relativeFilePath string) {
folderPath := config.WebPath
filePath := filepath.Join(folderPath, relativeFilePath)
http.ServeFile(w, r, filePath)
}
func handleStaticFile(r *mux.Router, requestPath string, filePath string, contentType string) {
r.HandleFunc(requestPath, func(w http.ResponseWriter, r *http.Request) {
log.Printf("handleStaticFile: %s", requestPath)
w.Header().Set("Content-Type", contentType)
serveWebFile(w, r, filePath)
})
}
// ----------------------------------------------------------------------------------------------------
// REST APIs
func handleGetBlocks(w http.ResponseWriter, r *http.Request) {
query := r.URL.Query()
parentID := query.Get("parent_id")
blockType := query.Get("type")
var blocks []string
if len(blockType) > 0 {
blocks = getBlocksWithParentAndType(parentID, blockType)
} else {
blocks = getBlocksWithParent(parentID)
}
log.Printf("GetBlocks parentID: %s, %d result(s)", parentID, len(blocks))
response := `[` + strings.Join(blocks[:], ",") + `]`
jsonResponse(w, 200, response)
}
func handlePostBlocks(w http.ResponseWriter, r *http.Request) {
requestBody, err := ioutil.ReadAll(r.Body)
if err != nil {
errorResponse(w, 500, `{}`)
return
}
// Catch panics from parse errors, etc.
defer func() {
if r := recover(); r != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, 500, `{}`)
return
}
}()
var blockMaps []map[string]interface{}
err = json.Unmarshal([]byte(requestBody), &blockMaps)
if err != nil {
errorResponse(w, 500, ``)
return
}
var blockIDsToNotify = []string{}
uniqueBlockIDs := make(map[string]bool)
for _, blockMap := range blockMaps {
jsonBytes, err := json.Marshal(blockMap)
if err != nil {
errorResponse(w, 500, `{}`)
return
}
block := blockFromMap(blockMap)
// Error checking
if len(block.Type) < 1 {
errorResponse(w, 500, fmt.Sprintf(`{"description": "missing type", "id": "%s"}`, block.ID))
return
}
if block.CreateAt < 1 {
errorResponse(w, 500, fmt.Sprintf(`{"description": "invalid createAt", "id": "%s"}`, block.ID))
return
}
if block.UpdateAt < 1 {
errorResponse(w, 500, fmt.Sprintf(`{"description": "invalid updateAt", "id": "%s"}`, block.ID))
return
}
if !uniqueBlockIDs[block.ID] {
blockIDsToNotify = append(blockIDsToNotify, block.ID)
}
if len(block.ParentID) > 0 && !uniqueBlockIDs[block.ParentID] {
blockIDsToNotify = append(blockIDsToNotify, block.ParentID)
}
insertBlock(block, string(jsonBytes))
}
wsServer.broadcastBlockChangeToWebsocketClients(blockIDsToNotify)
log.Printf("POST Blocks %d block(s)", len(blockMaps))
jsonResponse(w, 200, "{}")
}
func handleDeleteBlock(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
blockID := vars["blockID"]
var blockIDsToNotify = []string{blockID}
parentID := getParentID(blockID)
if len(parentID) > 0 {
blockIDsToNotify = append(blockIDsToNotify, parentID)
}
deleteBlock(blockID)
wsServer.broadcastBlockChangeToWebsocketClients(blockIDsToNotify)
log.Printf("DELETE Block %s", blockID)
jsonResponse(w, 200, "{}")
}
func handleGetSubTree(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
blockID := vars["blockID"]
blocks := getSubTree(blockID)
log.Printf("GetSubTree blockID: %s, %d result(s)", blockID, len(blocks))
response := `[` + strings.Join(blocks[:], ",") + `]`
jsonResponse(w, 200, response)
}
func handleExport(w http.ResponseWriter, r *http.Request) {
blocks := getAllBlocks()
log.Printf("EXPORT Blocks, %d result(s)", len(blocks))
response := `[` + strings.Join(blocks[:], ",") + `]`
jsonResponse(w, 200, response)
}
func handleImport(w http.ResponseWriter, r *http.Request) {
requestBody, err := ioutil.ReadAll(r.Body)
if err != nil {
errorResponse(w, 500, `{}`)
return
}
// Catch panics from parse errors, etc.
defer func() {
if r := recover(); r != nil {
log.Printf(`ERROR: %v`, r)
errorResponse(w, 500, `{}`)
return
}
}()
var blockMaps []map[string]interface{}
err = json.Unmarshal([]byte(requestBody), &blockMaps)
if err != nil {
errorResponse(w, 500, ``)
return
}
for _, blockMap := range blockMaps {
jsonBytes, err := json.Marshal(blockMap)
if err != nil {
errorResponse(w, 500, `{}`)
return
}
block := blockFromMap(blockMap)
insertBlock(block, string(jsonBytes))
}
log.Printf("IMPORT Blocks %d block(s)", len(blockMaps))
jsonResponse(w, 200, "{}")
}
// File upload
func handleServeFile(w http.ResponseWriter, r *http.Request) {
vars := mux.Vars(r)
filename := vars["filename"]
contentType := "image/jpg"
fileExtension := strings.ToLower(filepath.Ext(filename))
if fileExtension == "png" {
contentType = "image/png"
}
w.Header().Set("Content-Type", contentType)
folderPath := config.FilesPath
filePath := filepath.Join(folderPath, filename)
http.ServeFile(w, r, filePath)
}
func handleUploadFile(w http.ResponseWriter, r *http.Request) {
fmt.Println(`handleUploadFile`)
file, handle, err := r.FormFile("file")
if err != nil {
fmt.Fprintf(w, "%v", err)
return
}
defer file.Close()
log.Printf(`handleUploadFile, filename: %s`, handle.Filename)
saveFile(w, file, handle)
}
func saveFile(w http.ResponseWriter, file multipart.File, handle *multipart.FileHeader) {
data, err := ioutil.ReadAll(file)
if err != nil {
fmt.Fprintf(w, "%v", err)
return
}
// NOTE: File extension includes the dot
fileExtension := strings.ToLower(filepath.Ext(handle.Filename))
if fileExtension == ".jpeg" {
fileExtension = ".jpg"
}
filename := fmt.Sprintf(`%s%s`, createGUID(), fileExtension)
folderPath := config.FilesPath
filePath := filepath.Join(folderPath, filename)
os.MkdirAll(folderPath, os.ModePerm)
err = ioutil.WriteFile(filePath, data, 0666)
if err != nil {
jsonResponse(w, http.StatusInternalServerError, `{}`)
return
}
url := fmt.Sprintf(`%s/files/%s`, config.ServerRoot, filename)
log.Printf(`saveFile, url: %s`, url)
json := fmt.Sprintf(`{ "url": "%s" }`, url)
jsonResponse(w, http.StatusOK, json)
}
// Response helpers
func jsonResponse(w http.ResponseWriter, code int, message string) {
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(code)
fmt.Fprint(w, message)
}
func errorResponse(w http.ResponseWriter, code int, message string) {
log.Printf("%d ERROR", code)
w.WriteHeader(code)
fmt.Fprint(w, message)
}
// ----------------------------------------------------------------------------------------------------
// WebSocket OnChange listener
func isProcessRunning(pid int) bool {
process, err := os.FindProcess(pid)
if err != nil {
return false
}
err = process.Signal(syscall.Signal(0))
if err != nil {
return false
}
return true
}
func monitorPid(pid int) {
log.Printf("Monitoring PID: %d", pid)
go func() {
for {
if !isProcessRunning(pid) {
log.Printf("Monitored process not found, exiting.")
os.Exit(1)
}
time.Sleep(2 * time.Second)
}
}()
}
func main() {
// config.json file
var err error
config, err = readConfigFile()
if err != nil {
log.Fatal("Unable to read the config file: ", err)
return
}
// Command line args
pMonitorPid := flag.Int("monitorpid", -1, "a process ID")
pPort := flag.Int("port", config.Port, "the port number")
flag.Parse()
if pMonitorPid != nil && *pMonitorPid > 0 {
monitorPid(*pMonitorPid)
}
if pPort != nil && *pPort > 0 && *pPort != config.Port {
// Override port
log.Printf("Port from commandline: %d", *pPort)
config.Port = *pPort
}
wsServer = NewWSServer()
r := mux.NewRouter()
// Static files
handleStaticFile(r, "/", "index.html", "text/html; charset=utf-8")
handleStaticFile(r, "/boards", "boards.html", "text/html; charset=utf-8")
handleStaticFile(r, "/board", "board.html", "text/html; charset=utf-8")
handleStaticFile(r, "/boardsPage.js", "boardsPage.js", "text/javascript; charset=utf-8")
handleStaticFile(r, "/boardPage.js", "boardPage.js", "text/javascript; charset=utf-8")
handleStaticFile(r, "/favicon.ico", "static/favicon.svg", "image/svg+xml; charset=utf-8")
handleStaticFile(r, "/easymde.min.css", "static/easymde.min.css", "text/css")
handleStaticFile(r, "/main.css", "static/main.css", "text/css")
handleStaticFile(r, "/colors.css", "static/colors.css", "text/css")
handleStaticFile(r, "/images.css", "static/images.css", "text/css")
// APIs
r.HandleFunc("/api/v1/blocks", handleGetBlocks).Methods("GET")
r.HandleFunc("/api/v1/blocks", handlePostBlocks).Methods("POST")
r.HandleFunc("/api/v1/blocks/{blockID}", handleDeleteBlock).Methods("DELETE")
r.HandleFunc("/api/v1/blocks/{blockID}/subtree", handleGetSubTree).Methods("GET")
r.HandleFunc("/api/v1/files", handleUploadFile).Methods("POST")
r.HandleFunc("/api/v1/blocks/export", handleExport).Methods("GET")
r.HandleFunc("/api/v1/blocks/import", handleImport).Methods("POST")
// WebSocket
r.HandleFunc("/ws/onchange", wsServer.handleWebSocketOnChange)
// Files
r.HandleFunc("/files/{filename}", handleServeFile).Methods("GET")
http.Handle("/", r)
connectDatabase(config.DBType, config.DBConfigString)
// Ctrl+C handling
handler := make(chan os.Signal, 1)
signal.Notify(handler, os.Interrupt)
go func() {
for sig := range handler {
// sig is a ^C, handle it
if sig == os.Interrupt {
os.Exit(1)
break
}
}
}()
// Start the server, with SSL if the certs exist
urlPort := fmt.Sprintf(`:%d`, config.Port)
var isSSL = config.UseSSL && fileExists("./cert/cert.pem") && fileExists("./cert/key.pem")
if isSSL {
log.Println("https server started on ", urlPort)
err := http.ListenAndServeTLS(urlPort, "./cert/cert.pem", "./cert/key.pem", nil)
if err != nil {
log.Fatal("ListenAndServeTLS: ", err)
}
} else {
log.Println("http server started on ", urlPort)
err := http.ListenAndServe(urlPort, nil)
if err != nil {
log.Fatal("ListenAndServe: ", err)
}
}
}