Add download ONNX model in scratch_log, clean up graph image logic (#473)

demo/vdl_create_scratch_log

@@ -197,10 +197,9 @@ with logw.mode("train") as logger:
     embedding.add_embeddings_with_word_dict(hot_vectors, word_dict)
 
 
-def download_graph_image():
+def download_onnx():
     '''
-    This is a scratch demo, it do not generate a ONNX proto, but just download an image
-    that generated before to show how the graph frontend works.
+    This is a scratch demo, it do not generate a ONNX proto, but just download a prebuilt ONNX file.
 
     For real cases, just refer to README.
     '''
@@ -218,12 +217,12 @@ def download_graph_image():
     myssl = ssl.create_default_context()
     myssl.check_hostname = False
     myssl.verify_mode = ssl.CERT_NONE
-    image_url = "https://github.com/PaddlePaddle/VisualDL/blob/develop/demo/mxnet/super_resolution_graph.png?raw=true"
-    log.warning('download graph demo from {}'.format(image_url))
-    graph_image = ur.urlopen(image_url, context=myssl).read()
-    with open(os.path.join(logdir, 'graph.jpg'), 'wb') as f:
-        f.write(graph_image)
-    log.warning('graph ready!')
+    onnx_url = "https://github.com/PaddlePaddle/VisualDL/blob/develop/demo/mnist_model.onnx?raw=true"
+    log.warning('download ONNX file from {}'.format(onnx_url))
+    onnx_model = ur.urlopen(onnx_url, context=myssl).read()
+    with open(os.path.join(logdir, 'mnist_model.onnx'), 'wb') as f:
+        f.write(onnx_model)
+    log.warning('ONNX model ready! use visualdl --logdir=scratch_log -m scratch_log/mnist_model.onnx to launch')
 
 
-download_graph_image()
+download_onnx()

visualdl/server/graph.py

@@ -486,7 +486,7 @@ class GraphPreviewGenerator(object):
         return self.graph.edge(source, target, **kwargs)
 
 
-def draw_graph(model_pb_path, image_dir):
+def draw_graph(model_pb_path):
     json_str = load_model(model_pb_path)
     return json_str
 

visualdl/server/visualdl

@@ -299,29 +299,14 @@ def individual_audio():
 
 @app.route('/data/plugin/graphs/graph')
 def graph():
-    # TODO(daming-lu): rename variables because we switched from static graph generated by graphviz
-    # to d3/dagre drawn svg
-    if graph_image_path is not None:
-        data = {
-            'data': graph_image_path,
-        }
-    else:
-        image_dir = os.path.join(args.logdir, "graphs")
-        if not os.path.isdir(image_dir):
-            os.mkdir(image_dir)
-        json_str = vdl_graph.draw_graph(args.model_pb, image_dir)
+    json_str = vdl_graph.draw_graph(args.model_pb)
     data = {'data': json_str}
+
     result = gen_result(0, "", data)
     return Response(json.dumps(result), mimetype='application/json')
 
 
 if __name__ == '__main__':
     logger.info(" port=" + str(args.port))
-    if args.model_pb:
-        # draw graph
-        image_dir = os.path.join(args.logdir, "graphs")
-        if not os.path.isdir(image_dir):
-            os.mkdir(image_dir)
-        graph_image_path = vdl_graph.draw_graph(args.model_pb, image_dir)
 
     app.run(debug=False, host=args.host, port=args.port, threaded=True)