Make sure we don't try to read when opening a file in binary more. Fixes #1301.

gns3server/compute/base_manager.py

@@ -549,7 +549,7 @@ class BaseManager:
             # We store the file under his final name only when the upload is finished
             tmp_path = path + ".tmp"
             os.makedirs(os.path.dirname(path), exist_ok=True)
-            with open(tmp_path, 'wb+') as f:
+            with open(tmp_path, 'wb') as f:
                 while True:
                     packet = yield from stream.read(4096)
                     if not packet:

gns3server/compute/dynamips/__init__.py

@@ -547,7 +547,7 @@ class Dynamips(BaseManager):
                     content = content.replace('%h', vm.name)
                     f.write(content.encode("utf-8"))
         except OSError as e:
-            raise DynamipsError("Could not create config file {}: {}".format(path, e))
+            raise DynamipsError("Could not create config file '{}': {}".format(path, e))
 
         return os.path.join("configs", os.path.basename(path))
 

gns3server/compute/iou/iou_vm.py

@@ -348,14 +348,14 @@ class IOUVM(BaseNode):
             # reload
             path = os.path.join(os.path.expanduser("~/"), ".iourc")
             try:
-                with open(path, "wb+") as f:
+                with open(path, "wb") as f:
                     f.write(value.encode("utf-8"))
             except OSError as e:
                 raise IOUError("Could not write the iourc file {}: {}".format(path, e))
 
             path = os.path.join(self.temporary_directory, "iourc")
             try:
-                with open(path, "wb+") as f:
+                with open(path, "wb") as f:
                     f.write(value.encode("utf-8"))
             except OSError as e:
                 raise IOUError("Could not write the iourc file {}: {}".format(path, e))

gns3server/controller/drawing.py

@@ -118,7 +118,7 @@ class Drawing:
 
                 file_path = os.path.join(self._project.pictures_directory, filename)
                 if not os.path.exists(file_path):
-                    with open(file_path, "wb+") as f:
+                    with open(file_path, "wb") as f:
                         f.write(data)
                 value = filename
 

gns3server/controller/link.py

@@ -315,16 +315,19 @@ class Link:
             self._project.controller.notification.emit("link.updated", self.__json__())
 
         with stream_content as stream:
-            with open(self.capture_file_path, "wb+") as f:
-                while self._capturing:
-                    # We read 1 bytes by 1 otherwise the remaining data is not read if the traffic stops
-                    data = yield from stream.read(1)
-                    if data:
-                        f.write(data)
-                        # Flush to disk otherwise the live is not really live
-                        f.flush()
-                    else:
-                        break
+            try:
+                with open(self.capture_file_path, "wb") as f:
+                    while self._capturing:
+                        # We read 1 bytes by 1 otherwise the remaining data is not read if the traffic stops
+                        data = yield from stream.read(1)
+                        if data:
+                            f.write(data)
+                            # Flush to disk otherwise the live is not really live
+                            f.flush()
+                        else:
+                            break
+            except OSError as e:
+                raise aiohttp.web.HTTPConflict(text="Could not write capture file '{}': {}".format(self.capture_file_path, e))
 
     @asyncio.coroutine
     def stop_capture(self):

gns3server/controller/project.py

@@ -627,9 +627,12 @@ class Project:
 
             with tempfile.TemporaryDirectory() as tmpdir:
                 zipstream = yield from export_project(self, tmpdir, keep_compute_id=True, allow_all_nodes=True)
-                with open(snapshot.path, "wb+") as f:
-                    for data in zipstream:
-                        f.write(data)
+                try:
+                    with open(snapshot.path, "wb") as f:
+                        for data in zipstream:
+                            f.write(data)
+                except OSError as e:
+                    raise aiohttp.web.HTTPConflict(text="Could not write snapshot file '{}': {}".format(snapshot.path, e))
         except OSError as e:
             raise aiohttp.web.HTTPInternalServerError(text="Could not create project directory: {}".format(e))
 
@@ -858,7 +861,7 @@ class Project:
         try:
             with tempfile.TemporaryDirectory() as tmpdir:
                 zipstream = yield from export_project(self, tmpdir, keep_compute_id=True, allow_all_nodes=True)
-                with open(os.path.join(tmpdir, "project.gns3p"), "wb+") as f:
+                with open(os.path.join(tmpdir, "project.gns3p"), "wb") as f:
                     for data in zipstream:
                         f.write(data)
                 with open(os.path.join(tmpdir, "project.gns3p"), "rb") as f:

gns3server/handlers/api/controller/symbol_handler.py

@@ -16,6 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 import os
+import aiohttp
 from gns3server.web.route import Route
 from gns3server.controller import Controller
 
@@ -62,12 +63,15 @@ class SymbolHandler:
     def upload(request, response):
         controller = Controller.instance()
         path = os.path.join(controller.symbols.symbols_path(), os.path.basename(request.match_info["symbol_id"]))
-        with open(path, 'wb+') as f:
-            while True:
-                packet = yield from request.content.read(512)
-                if not packet:
-                    break
-                f.write(packet)
+        try:
+            with open(path, 'wb') as f:
+                while True:
+                    packet = yield from request.content.read(512)
+                    if not packet:
+                        break
+                    f.write(packet)
+        except OSError as e:
+            raise aiohttp.web.HTTPConflict(text="Could not write symbol file '{}': {}".format(path, e))
         # Reset the symbol list
         controller.symbols.list()
         response.set_status(204)

gns3server/run.py

@@ -160,7 +160,7 @@ def pid_lock(path):
             with open(path) as f:
                 try:
                     pid = int(f.read())
-                    os.kill(pid, 0)  # If the proces is not running kill return an error
+                    os.kill(pid, 0)  # kill returns an error if the process is not running
                 except (OSError, SystemError, ValueError):
                     pid = None
         except OSError as e: