error msg if no points (or incomplete data) is sent to upload

stitchcode/backend/save.py

@@ -9,40 +9,48 @@ import hashlib
 pixels_per_millimeter = 10
 
 def main():
-	emb = stitchcode.Embroidery()
+	
 	data = cgi.FieldStorage();	
 	xarr = data.getlist("x[]")
 	yarr = data.getlist("y[]")
-	jarr = data.getlist("j[]")
-	lx = -99999999
-	ly = -99999999
+	jarr = data.getlist("j[]")	
 	
-	fid = str(int(time.time() * 1000))
-	#sys.stderr.write(hashlib.sha1(str(time.time())).hexdigest())
+	if len(xarr) == len(yarr) == len(jarr) and len(xarr) > 1:
+		emb = stitchcode.Embroidery()
+
+		lx = -99999999
+		ly = -99999999
 		
-	for i in range(0, len(xarr)):
-		x = float(xarr[i])
-		y = float(yarr[i])*-1;
-		if jarr[i] == "true":
-			j = True
-		else:
-			j = False
+		fid = str(int(time.time() * 1000))
+		#sys.stderr.write(hashlib.sha1(str(time.time())).hexdigest())
 			
-		if not(x == lx and y == ly):
-			emb.addStitch(stitchcode.Point(x,y,j))
-		lx = x
-		ly = y
+		for i in range(0, len(xarr)):
+			x = float(xarr[i])
+			y = float(yarr[i])*-1;
+			if jarr[i] == "true":
+				j = True
+			else:
+				j = False
+				
+			if not(x == lx and y == ly):
+				emb.addStitch(stitchcode.Point(x,y,j))
+			lx = x
+			ly = y
+			
+		emb.translate_to_origin()	
+		emb.flatten()
+		emb.scale(27.80/pixels_per_millimeter)
+		emb.add_endstitches_to_jumps(10)
+		#emb.to_triple_stitches()	
+		emb.save_as_png("files/%s.png" % fid)
+		emb.save_as_exp("files/%s.exp" % fid)
 		
-	emb.translate_to_origin()	
-	emb.flatten()
-	emb.scale(27.80/pixels_per_millimeter)
-	emb.add_endstitches_to_jumps(10)
-	#emb.to_triple_stitches()	
-	emb.save_as_png("files/%s.png" % fid)
-	emb.save_as_exp("files/%s.exp" % fid)
+		print "Content-Disposition: attachment; filename=%s.exp" % fid	
+		print "Content-Type: application/octet-stream\n"
+		print emb.export_melco()
 	
-	print "Content-Disposition: attachment; filename=%s.exp" % fid	
-	print "Content-Type: application/octet-stream\n"
-	print emb.export_melco()
+	else:
+		print "Content-Type: text/html\n"		
+		print "Error: no points or incomplete data request"
 
 main()