Offload slow file operations to threads for snapshots and project "save as". Ref #1187 #1307.

gns3server/handlers/api/controller/link_handler.py

@@ -73,7 +73,7 @@ class LinkHandler:
                                          node.get("adapter_number", 0),
                                          node.get("port_number", 0),
                                          label=node.get("label"))
-        except aiohttp.web_exceptions.HTTPException as e:
+        except aiohttp.web.HTTPException as e:
             yield from project.delete_link(link.id)
             raise e
         response.set_status(201)

gns3server/handlers/api/controller/project_handler.py

@@ -335,7 +335,7 @@ class ProjectHandler:
         try:
             with tempfile.SpooledTemporaryFile(max_size=10000) as temp:
                 while True:
-                    packet = yield from request.content.read(512)
+                    packet = yield from request.content.read(1024)
                     if not packet:
                         break
                     temp.write(packet)
@@ -448,7 +448,7 @@ class ProjectHandler:
         try:
             with open(path, 'wb+') as f:
                 while True:
-                    packet = yield from request.content.read(512)
+                    packet = yield from request.content.read(1024)
                     if not packet:
                         break
                     f.write(packet)

gns3server/handlers/api/controller/server_handler.py

@@ -133,7 +133,7 @@ class ServerHandler:
 
     @Route.post(
         r"/debug",
-        description="Dump debug informations to disk (debug directory in config directory). Work only for local server",
+        description="Dump debug information to disk (debug directory in config directory). Work only for local server",
         status_codes={
             201: "Writed"
         })

gns3server/handlers/api/controller/symbol_handler.py

@@ -66,7 +66,7 @@ class SymbolHandler:
         try:
             with open(path, 'wb') as f:
                 while True:
-                    packet = yield from request.content.read(512)
+                    packet = yield from request.content.read(1024)
                     if not packet:
                         break
                     f.write(packet)