added barcode server example

Author: dayjaby

examples/barcode_server.py

@@ -0,0 +1,50 @@
+import pprint
+import time
+import threading
+from flask import Flask, jsonify
+
+from zebra_scanner import CoreScanner
+
+pp = pprint.PrettyPrinter(indent=4)
+cs = CoreScanner()
+
+app = Flask(__name__)
+
+new_barcodes_lock = threading.RLock()
+new_barcodes = {}
+
+@cs.on_scanner_added
+def on_scanner_added(scanner):
+    scanner.fetch_attributes()
+    scanner.pull_trigger()
+
+    @scanner.on_barcode
+    def on_barcode(barcode):
+        barcodeType = "?"
+        if barcode.type == 15:
+            barcodeType = "CODE128"
+        elif barcode.type == 6:
+            barcodeType = "I25"
+
+        new_barcodes[barcode.code] = {
+            "code": barcode.code,
+            "type": barcodeType
+        }
+
+@cs.on_scanner_removed
+def on_scanner_removed(scanner):
+    scanner.release_trigger()
+
+@app.route("/barcodes")
+def get_barcodes():
+    with new_barcodes_lock:
+        json = jsonify({
+            "barcodes": new_barcodes.values(),
+            "timestamp": int(time.time()*1000)
+        })
+        new_barcodes.clear()
+        return json
+
+if __name__ == '__main__':
+    app.run(host="0.0.0.0", debug=True, port=8080, use_reloader=False)
+

examples/test.py

@@ -4,15 +4,13 @@
 from zebra_scanner import CoreScanner
 
 pp = pprint.PrettyPrinter(indent=4)
-scanners = []
 cs = CoreScanner()
 
 
 @cs.on_scanner_added
 def on_scanner_added(scanner):
     print("New scanner found:")
     pp.pprint(scanner.__dict__)
-    scanners.append(scanner)
     scanner.pull_trigger()
 
     scanner.fetch_attributes()
@@ -34,7 +32,6 @@ def on_barcode(barcode):
 def on_scanner_removed(scanner):
     print("Scanner removed:")
     scanner.release_trigger()
-    scanners.remove(scanner)
     pp.pprint(scanner.__dict__)
 
 while True:

src/BoostPythonCoreScanner.cpp

@@ -375,7 +375,7 @@ void CoreScanner::OnBarcodeEvent(short int eventType, std::string & pscanData)
 		}
 		std::auto_ptr<Barcode> b{new Barcode()};
 		b->code = result;
-		b->type = scanData.child_value("datatype");
+		b->type = std::stoi(scanData.child_value("datatype"));
 		s.OnBarcode(b);
 	}
 }

src/BoostPythonCoreScanner.h

@@ -37,7 +37,7 @@ class Barcode
 {
 public:
 	std::string code;
-	std::string type;
+	int type;
 };
 
 class Scanner;