func (lua *LuaExt) exec(reqLogger log.Logger, app *LuaApp, appID, reqId, script string, w http.ResponseWriter, r *http.Request) int {
// FIXME(tsileo) a debug mode, with a defer/recover
// also parse the Lu error and show the bugging line!
start := time.Now()
httpClient := &http.Client{}
// Initialize internal Lua module written in Go
logger := loggerModule.New(reqLogger.New("ctx", "Lua"), start, reqId)
response := responseModule.New()
request := requestModule.New(r, reqId, lua.authFunc)
blobstore := blobstoreModule.New(lua.blobStore)
kvstore := kvstoreModule.New(lua.kvStore)
bewit := bewitModule.New(reqLogger.New("ctx", "Lua bewit module"), r)
template := templateModule.New()
// Initialize Lua state
L := luamod.NewState()
defer L.Close()
setCustomGlobals(L)
L.PreloadModule("request", request.Loader)
L.PreloadModule("response", response.Loader)
L.PreloadModule("logger", logger.Loader)
L.PreloadModule("blobstore", blobstore.Loader)
L.PreloadModule("kvstore", kvstore.Loader)
L.PreloadModule("bewit", bewit.Loader)
L.PreloadModule("template", template.Loader)
// TODO(tsileo) docstore module
// TODO(tsileo) cookies module
// TODO(tsileo) lru module
// TODO(tsileo) cache module => to cache response
// TODO(tsileo) load module from github directly?
// TODO(tsileo) ETag support
// 3rd party module
luajson.Preload(L)
L.PreloadModule("http", gluahttp.NewHttpModule(httpClient).Loader)
// Set some global variables
L.SetGlobal("reqID", luamod.LString(reqId))
L.SetGlobal("appID", luamod.LString(appID))
// Execute the code
if err := L.DoString(script); err != nil {
// FIXME better error, with debug mode?
panic(err)
}
// Apply the Response object to the actual response
response.WriteTo(w)
// TODO save the logRecords in the AppStats and find a way to serve them over Server-Sent Events
// keep them in memory with the ability to dump them in bulk as blob for later query
// logRecords := logger.Records()
for _, logRecord := range logger.Records() {
app.logs = append(app.logs, logRecord)
}
reqLogger.Info("Script executed", "response", response, "duration", time.Since(start))
return response.Status()
}
//luaMain creates a new lua state for each file in ./lua
//and hands them the globals they need to interact with lazlo
func luaMain(b *lazlo.Broker) {
broker = b
var luaDir *os.File
luaDirName := "lua"
if luaDirInfo, err := os.Stat(luaDirName); err == nil && luaDirInfo.IsDir() {
luaDir, _ = os.Open(luaDirName)
} else {
lazlo.Logger.Error("Couldn't open the Lua Plugin dir: ", err)
}
luaFiles, _ := luaDir.Readdir(0)
for _, f := range luaFiles {
if f.IsDir() {
continue
}
file := fmt.Sprintf("%s/%s", luaDirName, f.Name())
//make a new script entry
script := LuaScript{
Robot: &Robot{
ID: len(LuaScripts),
},
State: lua.NewState(),
}
defer script.State.Close()
// register hear and respond inside this lua state
script.State.SetGlobal("robot", luar.New(script.State, script.Robot))
//script.State.SetGlobal("respond", luar.New(script.State, Respond))
//script.State.SetGlobal("hear", luar.New(script.State, Hear))
LuaScripts = append(LuaScripts, script)
// the lua script will register callbacks to the Cases
if err := script.State.DoFile(file); err != nil {
panic(err)
}
}
//block waiting on events from the broker
for {
index, value, _ := reflect.Select(Cases)
handle(index, value.Interface())
}
}