add batch predict for HTTP service

python/examples/imagenet/image_classification_service.py

@@ -25,11 +25,21 @@ class ImageService(WebService):
         reader = ImageReader()
         if "image" not in feed:
             raise ("feed data error!")
-        sample = base64.b64decode(feed["image"])
-        img = reader.process_image(sample)
-        res_feed = {}
-        res_feed["image"] = img.reshape(-1)
-        return res_feed, fetch
+        if isinstance(feed["image"], list):
+            feed_batch = []
+            for image in feed["image"]:
+                sample = base64.b64decode(image)
+                img = reader.process_image(sample)
+                res_feed = {}
+                res_feed["image"] = img.reshape(-1)
+                feed_batch.append(res_feed)
+            return feed_batch, fetch
+        else:
+            sample = base64.b64decode(feed["image"])
+            img = reader.process_image(sample)
+            res_feed = {}
+            res_feed["image"] = img.reshape(-1)
+            return res_feed, fetch
 
 
 image_service = ImageService(name="image")

python/examples/imagenet/image_classification_service_gpu.py

@@ -25,16 +25,27 @@ class ImageService(WebService):
         reader = ImageReader()
         if "image" not in feed:
             raise ("feed data error!")
-        sample = base64.b64decode(feed["image"])
-        img = reader.process_image(sample)
-        res_feed = {}
-        res_feed["image"] = img.reshape(-1)
-        return res_feed, fetch
+        print(type(feed["image"]), isinstance(feed["image"], list))
+        if isinstance(feed["image"], list):
+            feed_batch = []
+            for image in feed["image"]:
+                sample = base64.b64decode(image)
+                img = reader.process_image(sample)
+                res_feed = {}
+                res_feed["image"] = img.reshape(-1)
+                feed_batch.append(res_feed)
+            return feed_batch, fetch
+        else:
+            sample = base64.b64decode(feed["image"])
+            img = reader.process_image(sample)
+            res_feed = {}
+            res_feed["image"] = img.reshape(-1)
+            return res_feed, fetch
 
 
 image_service = ImageService(name="image")
 image_service.load_model_config(sys.argv[1])
-image_service.set_gpus("0,1,2,3")
+image_service.set_gpus("0,1")
 image_service.prepare_server(
     workdir=sys.argv[2], port=int(sys.argv[3]), device="gpu")
 image_service.run_server()

python/examples/imagenet/image_http_client.py

@@ -24,17 +24,26 @@ def predict(image_path, server):
     req = json.dumps({"image": image, "fetch": ["score"]})
     r = requests.post(
         server, data=req, headers={"Content-Type": "application/json"})
+    print(r.json()["score"][0])
+    return r
+
+
+def batch_predict(image_path, server):
+    image = base64.b64encode(open(image_path).read())
+    req = json.dumps({"image": [image, image], "fetch": ["score"]})
+    r = requests.post(
+        server, data=req, headers={"Content-Type": "application/json"})
+    print(r.json()["result"][1]["score"][0])
     return r
 
 
 if __name__ == "__main__":
-    server = "http://127.0.0.1:9295/image/prediction"
+    server = "http://127.0.0.1:9393/image/prediction"
     #image_path = "./data/n01440764_10026.JPEG"
-    image_list = os.listdir("./data/image_data/n01440764/")
+    image_list = os.listdir("./image_data/n01440764/")
     start = time.time()
     for img in image_list:
-        image_file = "./data/image_data/n01440764/" + img
+        image_file = "./image_data/n01440764/" + img
         res = predict(image_file, server)
-        print(res.json()["score"][0])
     end = time.time()
     print(end - start)

python/paddle_serving_server/web_service.py

@@ -64,12 +64,19 @@ class WebService(object):
             if "fetch" not in request.json:
                 abort(400)
             feed, fetch = self.preprocess(request.json, request.json["fetch"])
-            if "fetch" in feed:
-                del feed["fetch"]
-            fetch_map = client_service.predict(feed=feed, fetch=fetch)
-            fetch_map = self.postprocess(
-                feed=request.json, fetch=fetch, fetch_map=fetch_map)
-            return fetch_map
+            if isinstance(feed, list):
+                fetch_map_batch = client_service.batch_predict(
+                    feed_batch=feed, fetch=fetch)
+                fetch_map_batch = self.postprocess(
+                    feed=request.json, fetch=fetch, fetch_map=fetch_map_batch)
+                result = {"result": fetch_map_batch}
+            elif isinstance(feed, dict):
+                if "fetch" in feed:
+                    del feed["fetch"]
+                fetch_map = client_service.predict(feed=feed, fetch=fetch)
+                result = self.postprocess(
+                    feed=request.json, fetch=fetch, fetch_map=fetch_map)
+            return result
 
         app_instance.run(host="0.0.0.0",
                          port=self.port,
@@ -92,5 +99,5 @@ class WebService(object):
     def preprocess(self, feed={}, fetch=[]):
         return feed, fetch
 
-    def postprocess(self, feed={}, fetch=[], fetch_map={}):
+    def postprocess(self, feed={}, fetch=[], fetch_map=None):
         return fetch_map

python/paddle_serving_server_gpu/web_service.py

@@ -95,12 +95,20 @@ class WebService(object):
         while True:
             request_json = inputqueue.get()
             feed, fetch = self.preprocess(request_json, request_json["fetch"])
-            if "fetch" in feed:
-                del feed["fetch"]
-            fetch_map = client.predict(feed=feed, fetch=fetch)
-            fetch_map = self.postprocess(
-                feed=request_json, fetch=fetch, fetch_map=fetch_map)
-            self.output_queue.put(fetch_map)
+            if isinstance(feed, list):
+                fetch_map_batch = client.batch_predict(
+                    feed_batch=feed, fetch=fetch)
+                fetch_map_batch = self.postprocess(
+                    feed=request_json, fetch=fetch, fetch_map=fetch_map_batch)
+                result = {"result": fetch_map_batch}
+            elif isinstance(feed, dict):
+                if "fetch" in feed:
+                    del feed["fetch"]
+                fetch_map = client.predict(feed=feed, fetch=fetch)
+                result = self.postprocess(
+                    feed=request_json, fetch=fetch, fetch_map=fetch_map)
+
+            self.output_queue.put(result)
 
     def _launch_web_service(self, gpu_num):
         app_instance = Flask(__name__)
@@ -186,5 +194,5 @@ class WebService(object):
     def preprocess(self, feed={}, fetch=[]):
         return feed, fetch
 
-    def postprocess(self, feed={}, fetch=[], fetch_map={}):
+    def postprocess(self, feed={}, fetch=[], fetch_map=None):
         return fetch_map