diff options
Diffstat (limited to 'bookpipeline/main.go')
| -rw-r--r-- | bookpipeline/main.go | 397 |
1 files changed, 0 insertions, 397 deletions
diff --git a/bookpipeline/main.go b/bookpipeline/main.go deleted file mode 100644 index b7b01dd..0000000 --- a/bookpipeline/main.go +++ /dev/null @@ -1,397 +0,0 @@ -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/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 - -` - -// 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 -} - -const PauseBetweenChecks = 3 * time.Minute - -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) (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 - Logger() *log.Logger -} - -type Qmsg struct { - Handle, Body string -} - -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) - } -} - -type Conf struct { - path, code string - conf float64 -} - -func analyse(toanalyse chan string, up chan string, errc chan error, logger *log.Logger) { - confs := make(map[string][]*Conf) - bestconfs := make(map[string]*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 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 = graph(bestconfs, filepath.Base(savedir), f) - if err != nil { - close(up) - errc <- errors.New(fmt.Sprintf("Error rendering graph: %s", err)) - return - } - up <- fn - - // TODO: generate a general report.txt with statistics etc for the book, send to up - - close(up) -} - -func processBook(msg 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.Logger()) - go up(upc, done, conn, bookname, errc) - - conn.Logger().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.Logger().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.Logger().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.Logger().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 = &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) - } - } - } -} |