diff options
Diffstat (limited to 'bookpipeline/cmd')
| -rw-r--r-- | bookpipeline/cmd/bookpipeline/main.go | 388 |
1 files changed, 388 insertions, 0 deletions
diff --git a/bookpipeline/cmd/bookpipeline/main.go b/bookpipeline/cmd/bookpipeline/main.go new file mode 100644 index 0000000..9fa7159 --- /dev/null +++ b/bookpipeline/cmd/bookpipeline/main.go @@ -0,0 +1,388 @@ +package main + +// TODO: have logs go somewhere useful, like email +// TODO: check if images are prebinarised and if so skip multiple binarisation + +import ( + "errors" + "flag" + "fmt" + "log" + "os" + "os/exec" + "path/filepath" + "regexp" + "strings" + "time" + + "rescribe.xyz/go.git/bookpipeline" + "rescribe.xyz/go.git/lib/hocr" + "rescribe.xyz/go.git/preproc" +) + +const usage = `Usage: bookpipeline [-v] [-t training] + +Watches the preprocess, ocr and analyse queues for book names. When +one is found this general process is followed: + +- The book name is hidden from the queue, and a 'heartbeat' is + started which keeps it hidden (this will time out after 2 minutes + if the program is terminated) +- The necessary files from bookname/ are downloaded +- The files are processed +- The resulting files are uploaded to bookname/ +- The heartbeat is stopped +- The book name is removed from the queue it was taken from, and + added to the next queue for future processing + +` + +const PauseBetweenChecks = 3 * time.Minute +const HeartbeatTime = 60 + +// null writer to enable non-verbose logging to be discarded +type NullWriter bool + +func (w NullWriter) Write(p []byte) (n int, err error) { + return len(p), nil +} + +type Clouder interface { + Init() error + ListObjects(bucket string, prefix string) ([]string, error) + Download(bucket string, key string, fn string) error + Upload(bucket string, key string, path string) error + CheckQueue(url string) (bookpipeline.Qmsg, error) + AddToQueue(url string, msg string) error + DelFromQueue(url string, handle string) error + QueueHeartbeat(t *time.Ticker, msgHandle string, qurl string) error +} + +type Pipeliner interface { + Clouder + PreQueueId() string + OCRQueueId() string + AnalyseQueueId() string + WIPStorageId() string + GetLogger() *log.Logger +} + +func download(dl chan string, process chan string, conn Pipeliner, dir string, errc chan error) { + for key := range dl { + fn := filepath.Join(dir, filepath.Base(key)) + err := conn.Download(conn.WIPStorageId(), key, fn) + if err != nil { + close(process) + errc <- err + return + } + process <- fn + } + close(process) +} + +func up(c chan string, done chan bool, conn Pipeliner, bookname string, errc chan error) { + for path := range c { + name := filepath.Base(path) + key := filepath.Join(bookname, name) + err := conn.Upload(conn.WIPStorageId(), key, path) + if err != nil { + errc <- err + return + } + } + + done <- true +} + +func preprocess(pre chan string, up chan string, errc chan error, logger *log.Logger) { + for path := range pre { + logger.Println("Preprocessing", path) + done, err := preproc.PreProcMulti(path, []float64{0.1, 0.2, 0.4, 0.5}, "binary", 0, true, 5, 30) + if err != nil { + close(up) + errc <- err + return + } + for _, p := range done { + up <- p + } + } + close(up) +} + +func ocr(training string) func(chan string, chan string, chan error, *log.Logger) { + return func (toocr chan string, up chan string, errc chan error, logger *log.Logger) { + for path := range toocr { + logger.Println("OCRing", path) + name := strings.Replace(path, ".png", "", 1) + cmd := exec.Command("tesseract", "-l", training, path, name, "hocr") + err := cmd.Run() + if err != nil { + close(up) + errc <- errors.New(fmt.Sprintf("Error ocring %s: %s", path, err)) + return + } + up <- name + ".hocr" + } + close(up) + } +} + +func analyse(toanalyse chan string, up chan string, errc chan error, logger *log.Logger) { + confs := make(map[string][]*bookpipeline.Conf) + bestconfs := make(map[string]*bookpipeline.Conf) + savedir := "" + + for path := range toanalyse { + if savedir == "" { + savedir = filepath.Dir(path) + } + logger.Println("Calculating confidence for", path) + avg, err := hocr.GetAvgConf(path) + if err != nil { + close(up) + errc <- errors.New(fmt.Sprintf("Error retreiving confidence for %s: %s", path, err)) + return + } + base := filepath.Base(path) + codestart := strings.Index(base, "_bin") + name := base[0:codestart] + var c bookpipeline.Conf + c.Path = path + c.Code = base[codestart:] + c.Conf = avg + confs[name] = append(confs[name], &c) + + } + + fn := filepath.Join(savedir, "conf") + logger.Println("Saving confidences in file", fn) + f, err := os.Create(fn) + if err != nil { + close(up) + errc <- errors.New(fmt.Sprintf("Error creating file %s: %s", fn, err)) + return + } + defer f.Close() + + logger.Println("Finding best confidence for each page, and saving all confidences") + for base, conf := range confs { + var best float64 + for _, c := range conf { + if c.Conf > best { + best = c.Conf + bestconfs[base] = c + } + _, err = fmt.Fprintf(f, "%s\t%02.f\n", c.Path, c.Conf) + if err != nil { + close(up) + errc <- errors.New(fmt.Sprintf("Error writing confidences file: %s", err)) + return + } + } + } + up <- fn + + logger.Println("Creating best file listing the best file for each page") + fn = filepath.Join(savedir, "best") + f, err = os.Create(fn) + if err != nil { + close(up) + errc <- errors.New(fmt.Sprintf("Error creating file %s: %s", fn, err)) + return + } + defer f.Close() + for _, conf := range bestconfs { + _, err = fmt.Fprintf(f, "%s\n", filepath.Base(conf.Path)) + } + up <- fn + + logger.Println("Creating graph") + fn = filepath.Join(savedir, "graph.png") + f, err = os.Create(fn) + if err != nil { + close(up) + errc <- errors.New(fmt.Sprintf("Error creating file %s: %s", fn, err)) + return + } + defer f.Close() + err = bookpipeline.Graph(bestconfs, filepath.Base(savedir), f) + if err != nil { + close(up) + errc <- errors.New(fmt.Sprintf("Error rendering graph: %s", err)) + return + } + up <- fn + + close(up) +} + +func processBook(msg bookpipeline.Qmsg, conn Pipeliner, process func(chan string, chan string, chan error, *log.Logger), match *regexp.Regexp, fromQueue string, toQueue string) error { + bookname := msg.Body + + t := time.NewTicker(HeartbeatTime * time.Second) + go conn.QueueHeartbeat(t, msg.Handle, fromQueue) + + d := filepath.Join(os.TempDir(), bookname) + err := os.MkdirAll(d, 0755) + if err != nil { + t.Stop() + return errors.New(fmt.Sprintf("Failed to create directory %s: %s", d, err)) + } + + dl := make(chan string) + processc := make(chan string) + upc := make(chan string) + done := make(chan bool) + errc := make(chan error) + + // these functions will do their jobs when their channels have data + go download(dl, processc, conn, d, errc) + go process(processc, upc, errc, conn.GetLogger()) + go up(upc, done, conn, bookname, errc) + + conn.GetLogger().Println("Getting list of objects to download") + objs, err := conn.ListObjects(conn.WIPStorageId(), bookname) + if err != nil { + t.Stop() + _ = os.RemoveAll(d) + return errors.New(fmt.Sprintf("Failed to get list of files for book %s: %s", bookname, err)) + } + var todl []string + for _, n := range objs { + if !match.MatchString(n) { + conn.GetLogger().Println("Skipping item that doesn't match target", n) + continue + } + todl = append(todl, n) + } + for _, a := range todl { + dl <- a + } + close(dl) + + // wait for either the done or errc channel to be sent to + select { + case err = <-errc: + t.Stop() + _ = os.RemoveAll(d) + return err + case <-done: + } + + if toQueue != "" { + conn.GetLogger().Println("Sending", bookname, "to queue") + err = conn.AddToQueue(toQueue, bookname) + if err != nil { + t.Stop() + _ = os.RemoveAll(d) + return errors.New(fmt.Sprintf("Error adding to queue %s: %s", bookname, err)) + } + } + + t.Stop() + + conn.GetLogger().Println("Deleting original message from queue") + err = conn.DelFromQueue(fromQueue, msg.Handle) + if err != nil { + _ = os.RemoveAll(d) + return errors.New(fmt.Sprintf("Error deleting message from queue: %s", err)) + } + + err = os.RemoveAll(d) + if err != nil { + return errors.New(fmt.Sprintf("Failed to remove directory %s: %s", d, err)) + } + + return nil +} + +func main() { + verbose := flag.Bool("v", false, "verbose") + training := flag.String("t", "rescribealphav5", "tesseract training file to use") + flag.Usage = func() { + fmt.Fprintf(flag.CommandLine.Output(), usage) + flag.PrintDefaults() + } + flag.Parse() + + var verboselog *log.Logger + if *verbose { + verboselog = log.New(os.Stdout, "", log.LstdFlags) + } else { + var n NullWriter + verboselog = log.New(n, "", log.LstdFlags) + } + + origPattern := regexp.MustCompile(`[0-9]{4}.jpg$`) // TODO: match alternative file naming + preprocessedPattern := regexp.MustCompile(`_bin[0-9].[0-9].png$`) + ocredPattern := regexp.MustCompile(`.hocr$`) + + var conn Pipeliner + conn = &bookpipeline.AwsConn{Region: "eu-west-2", Logger: verboselog} + + verboselog.Println("Setting up AWS session") + err := conn.Init() + if err != nil { + log.Fatalln("Error setting up cloud connection:", err) + } + verboselog.Println("Finished setting up AWS session") + + var checkPreQueue <-chan time.Time + var checkOCRQueue <-chan time.Time + var checkAnalyseQueue <-chan time.Time + checkPreQueue = time.After(0) + checkOCRQueue = time.After(0) + checkAnalyseQueue = time.After(0) + + for { + select { + case <-checkPreQueue: + msg, err := conn.CheckQueue(conn.PreQueueId()) + checkPreQueue = time.After(PauseBetweenChecks) + if err != nil { + log.Println("Error checking preprocess queue", err) + continue + } + if msg.Handle == "" { + verboselog.Println("No message received on preprocess queue, sleeping") + continue + } + err = processBook(msg, conn, preprocess, origPattern, conn.PreQueueId(), conn.OCRQueueId()) + if err != nil { + log.Println("Error during preprocess", err) + } + case <-checkOCRQueue: + msg, err := conn.CheckQueue(conn.OCRQueueId()) + checkOCRQueue = time.After(PauseBetweenChecks) + if err != nil { + log.Println("Error checking OCR queue", err) + continue + } + if msg.Handle == "" { + verboselog.Println("No message received on OCR queue, sleeping") + continue + } + err = processBook(msg, conn, ocr(*training), preprocessedPattern, conn.OCRQueueId(), conn.AnalyseQueueId()) + if err != nil { + log.Println("Error during OCR process", err) + } + case <-checkAnalyseQueue: + msg, err := conn.CheckQueue(conn.AnalyseQueueId()) + checkAnalyseQueue = time.After(PauseBetweenChecks) + if err != nil { + log.Println("Error checking analyse queue", err) + continue + } + if msg.Handle == "" { + verboselog.Println("No message received on analyse queue, sleeping") + continue + } + err = processBook(msg, conn, analyse, ocredPattern, conn.AnalyseQueueId(), "") + if err != nil { + log.Println("Error during analysis", err) + } + } + } +} |