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//
// rhimportd
//
// The Radio Helsinki Rivendell Import Daemon
//
//
// Copyright (C) 2015-2016 Christian Pointner <equinox@helsinki.at>
//
// This file is part of rhimportd.
//
// rhimportd is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// any later version.
//
// rhimportd is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with rhimportd. If not, see <http://www.gnu.org/licenses/>.
//
package main
import (
"encoding/json"
"fmt"
"net/http"
"os"
"path/filepath"
"strings"
"time"
"code.helsinki.at/rhrd-go/rhimport"
)
type watchDirRequestData struct {
UserName string `json:"LOGIN_NAME"`
ShowId uint `json:"SHOW_ID"`
ClearShowCarts bool `json:"CLEAR_SHOW_CARTS"`
MusicPoolGroup string `json:"MUSIC_POOL_GROUP"`
Cart uint `json:"CART_NUMBER"`
ClearCart bool `json:"CLEAR_CART"`
Cut uint `json:"CUT_NUMBER"`
Channels uint `json:"CHANNELS"`
NormalizationLevel int `json:"NORMALIZATION_LEVEL"`
AutotrimLevel int `json:"AUTOTRIM_LEVEL"`
UseMetaData bool `json:"USE_METADATA"`
SourceUri string `json:"SOURCE_URI"`
SourceFilePolicy string `json:"SOURCE_FILE_POLICY"`
}
func newWatchDirRequestData(conf *rhimport.Config) *watchDirRequestData {
rd := new(watchDirRequestData)
rd.UserName = ""
rd.ShowId = 0
rd.ClearShowCarts = false
rd.MusicPoolGroup = ""
rd.Cart = 0
rd.ClearCart = false
rd.Cut = 0
rd.Channels = conf.ImportParamDefaults.Channels
rd.NormalizationLevel = conf.ImportParamDefaults.NormalizationLevel
rd.AutotrimLevel = conf.ImportParamDefaults.AutotrimLevel
rd.UseMetaData = conf.ImportParamDefaults.UseMetaData
rd.SourceUri = ""
rd.SourceFilePolicy = ""
return rd
}
type watchDirResponseData struct {
ResponseCode int `json:"RESPONSE_CODE"`
ErrorString string `json:"ERROR_STRING"`
Cart uint `json:"CART_NUMBER"`
Cut uint `json:"CUT_NUMBER"`
SourceFile string `json:"SOURCE_FILE"`
}
func watchDirWriteResponse(filename string, resp *watchDirResponseData) {
file, err := os.OpenFile(filename, os.O_WRONLY|os.O_TRUNC, 0)
if err != nil {
rhl.Printf("watch-dir-ctrl: writing response failed: %s", err)
return
}
encoder := json.NewEncoder(file)
encoder.Encode(resp)
file.Close()
dstname := strings.TrimSuffix(filename, ".running") + ".done"
os.Rename(filename, dstname)
}
func watchDirErrorResponse(filename string, code int, errStr, sourceFile string) {
watchDirWriteResponse(filename, &watchDirResponseData{code, errStr, 0, 0, sourceFile})
}
func watchDirResponse(filename string, result *rhimport.Result) {
watchDirWriteResponse(filename, &watchDirResponseData{result.ResponseCode, result.ErrorString, result.Cart, result.Cut, result.SourceFile})
}
func watchDirParseRequest(conf *rhimport.Config, req *os.File) (ctx *rhimport.Context, err error) {
decoder := json.NewDecoder(req)
reqdata := newWatchDirRequestData(conf)
if jsonerr := decoder.Decode(reqdata); jsonerr != nil {
err = fmt.Errorf("Error parsing JSON response: %s", jsonerr)
return
}
ctx = rhimport.NewContext(conf, nil, getStdLog("sess-%s-std"), getDbgLog("sess-%s-dbg"))
ctx.UserName = reqdata.UserName
ctx.Trusted = true
ctx.ShowId = reqdata.ShowId
ctx.ClearShowCarts = reqdata.ClearShowCarts
ctx.GroupName = reqdata.MusicPoolGroup
ctx.Cart = reqdata.Cart
ctx.ClearCart = reqdata.ClearCart
ctx.Cut = reqdata.Cut
ctx.Channels = reqdata.Channels
ctx.NormalizationLevel = reqdata.NormalizationLevel
ctx.AutotrimLevel = reqdata.AutotrimLevel
ctx.UseMetaData = reqdata.UseMetaData
ctx.SourceUri = reqdata.SourceUri
if reqdata.SourceFilePolicy != "" {
err = ctx.SourceFilePolicy.FromString(reqdata.SourceFilePolicy)
}
return
}
func watchDirDone(res rhimport.Result, userdata interface{}) bool {
c := userdata.(chan<- rhimport.Result)
c <- res
return true
}
func watchDirHandler(conf *rhimport.Config, sessions *rhimport.SessionStore, ctx *rhimport.Context, filename string) {
rhdl.Printf("WatchDirHandler: request for '%s'", filename)
_, s, code, errstring := sessions.New(ctx, "")
if code != http.StatusOK {
watchDirErrorResponse(filename, code, errstring, "")
return
}
donechan := make(chan rhimport.Result, 1)
if err := s.AddDoneHandler((chan<- rhimport.Result)(donechan), watchDirDone); err != nil {
watchDirErrorResponse(filename, http.StatusInternalServerError, err.Error(), "")
return
}
s.Run(0)
res := <-donechan
watchDirResponse(filename, &res)
return
}
func watchDirRun(dirname string, conf *rhimport.Config, sessions *rhimport.SessionStore) bool {
dir, err := os.Open(dirname)
if err != nil {
rhl.Printf("watch-dir-ctrl: %s", err)
return false
}
defer dir.Close()
var di os.FileInfo
if di, err = dir.Stat(); err != nil {
rhl.Printf("watch-dir-ctrl: %s", err)
return false
}
if !di.IsDir() {
rhl.Printf("watch-dir-ctrl: %s is not a directory", dirname)
return false
}
var names []string
if names, err = dir.Readdirnames(0); err != nil {
rhl.Printf("watch-dir-ctrl: reading directory contents failed: %s", err)
return false
}
for _, name := range names {
if strings.HasSuffix(name, ".new") {
srcname := filepath.Join(dir.Name(), name)
rhdl.Printf("watch-dir-ctrl: found new file %s", srcname)
var file *os.File
if file, err = os.Open(srcname); err != nil {
rhl.Printf("watch-dir-ctrl: error reading new file: %s", err)
continue
}
if ctx, err := watchDirParseRequest(conf, file); err == nil {
file.Close()
dstname := strings.TrimSuffix(srcname, ".new") + ".running"
os.Rename(srcname, dstname)
go watchDirHandler(conf, sessions, ctx, dstname)
} else { // ignoring files with json errors -> maybe the file has not been written completely
file.Close()
rhdl.Printf("watch-dir-ctrl: new file %s parser error: %s, ignoring for now", srcname, err)
}
}
}
return true
}
func StartWatchDir(dirname string, conf *rhimport.Config, sessions *rhimport.SessionStore) {
for {
rhl.Printf("watch-dir-ctrl: watching for files in %s", dirname)
t := time.NewTicker(1 * time.Second)
for {
if !watchDirRun(dirname, conf, sessions) {
break
}
<-t.C
}
t.Stop()
rhdl.Printf("watch-dir-ctrl: restarting in 5 sec...")
time.Sleep(5 * time.Second)
}
}
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