Stream pcap from compute to controller to client

gns3server/compute/project.py

@@ -284,7 +284,7 @@ class Project:
         """
         A temporary directory. Will be clean at project open and close
         """
-        return os.path.join(self._path, "project-files", "tmp")
+        return os.path.join(self._path, "tmp")
 
     def capture_working_directory(self):
         """
@@ -293,7 +293,7 @@ class Project:
         :returns: path to the directory
         """
 
-        workdir = os.path.join(self._path, "project-files", "tmp", "captures")
+        workdir = os.path.join(self._path, "tmp", "captures")
         try:
             os.makedirs(workdir, exist_ok=True)
         except OSError as e:

gns3server/controller/compute.py

@@ -125,6 +125,22 @@ class Compute:
             "connected": self._connected
         }
 
+    @asyncio.coroutine
+    def streamFile(self, project, path):
+        """
+        Read file of a project and stream it
+
+        :param project: A project object
+        :param path: The path of the file in the project
+        :returns: A file stream
+        """
+
+        url = self._getUrl("/projects/{}/stream/{}".format(project.id, path))
+        response = yield from self._session.request("GET", url, auth=self._auth)
+        if response.status == 404:
+            raise aiohttp.web.HTTPNotFound(text="{} not found on compute".format(path))
+        return response.content
+
     @asyncio.coroutine
     def httpQuery(self, method, path, data=None):
         if not self._connected:

gns3server/controller/link.py

@@ -70,6 +70,13 @@ class Link:
         """
         raise NotImplementedError
 
+    @asyncio.coroutine
+    def read_pcap(self):
+        """
+        Return a FileStream of the Pcap from the compute node
+        """
+        raise NotImplementedError
+
     def capture_file_name(self):
         """
         :returns: File name for a capture on this link

gns3server/controller/udp_link.py

@@ -122,3 +122,12 @@ class UDPLink(Link):
                 return vm
 
         raise aiohttp.web.HTTPConflict(text="Capture is not supported for this link")
+
+    @asyncio.coroutine
+    def read_pcap(self):
+        """
+        Return a FileStream of the Pcap from the compute node
+        """
+        if self._capture_vm:
+            compute = self._capture_vm["vm"].compute
+            return compute.streamFile(self._project, "tmp/captures/" + self.capture_file_name())

gns3server/handlers/api/compute/__init__.py

@@ -27,7 +27,6 @@ from .virtualbox_handler import VirtualBoxHandler
 from .vpcs_handler import VPCSHandler
 from .vmware_handler import VMwareHandler
 from .config_handler import ConfigHandler
-from .file_handler import FileHandler
 from .version_handler import VersionHandler
 from .notification_handler import NotificationHandler
 

gns3server/handlers/api/compute/file_handler.py

@@ -1,59 +0,0 @@
-#
-# Copyright (C) 2015 GNS3 Technologies Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-import asyncio
-import aiohttp
-
-from ....web.route import Route
-from ....schemas.file import FILE_STREAM_SCHEMA
-
-
-class FileHandler:
-
-    @classmethod
-    @Route.get(
-        r"/files/stream",
-        description="Stream a file from the server",
-        status_codes={
-            200: "File retrieved",
-            404: "File doesn't exist",
-            409: "Can't access to file"
-        },
-        input=FILE_STREAM_SCHEMA
-    )
-    def read(request, response):
-        response.enable_chunked_encoding()
-
-        try:
-            with open(request.json.get("location"), "rb") as f:
-                loop = asyncio.get_event_loop()
-                response.content_type = "application/octet-stream"
-                response.set_status(200)
-                # Very important: do not send a content lenght otherwise QT close the connection but curl can consume the Feed
-                response.content_length = None
-
-                response.start(request)
-
-                while True:
-                    data = yield from loop.run_in_executor(None, f.read, 16)
-                    if len(data) == 0:
-                        yield from asyncio.sleep(0.1)
-                    else:
-                        response.write(data)
-        except FileNotFoundError:
-            raise aiohttp.web.HTTPNotFound()
-        except OSError as e:
-            raise aiohttp.web.HTTPConflict(text=str(e))

gns3server/handlers/api/compute/project_handler.py

@@ -305,6 +305,50 @@ class ProjectHandler:
         except PermissionError:
             raise aiohttp.web.HTTPForbidden()
 
+    @classmethod
+    @Route.get(
+        r"/projects/{project_id}/stream/{path:.+}",
+        description="Stream a file from a project",
+        parameters={
+            "project_id": "The UUID of the project",
+        },
+        status_codes={
+            200: "Return the file",
+            403: "Permission denied",
+            404: "The file doesn't exist"
+        })
+    def stream_file(request, response):
+
+        pm = ProjectManager.instance()
+        project = pm.get_project(request.match_info["project_id"])
+        path = request.match_info["path"]
+        path = os.path.normpath(path)
+
+        # Raise error if user try to escape
+        if path[0] == ".":
+            raise aiohttp.web.HTTPForbidden
+        path = os.path.join(project.path, path)
+
+        response.content_type = "application/octet-stream"
+        response.set_status(200)
+        response.enable_chunked_encoding()
+        # Very important: do not send a content length otherwise QT close the connection but curl can consume the Feed
+        response.content_length = None
+
+        try:
+            with open(path, "rb") as f:
+                response.start(request)
+                while True:
+                    data = f.read(4096)
+                    if not data:
+                        yield from asyncio.sleep(0.1)
+                    yield from response.write(data)
+
+        except FileNotFoundError:
+            raise aiohttp.web.HTTPNotFound()
+        except PermissionError:
+            raise aiohttp.web.HTTPForbidden()
+
     @classmethod
     @Route.post(
         r"/projects/{project_id}/files/{path:.+}",

gns3server/handlers/api/controller/link_handler.py

@@ -15,6 +15,9 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
+import aiohttp
+import asyncio
+
 from ....web.route import Route
 from ....schemas.link import LINK_OBJECT_SCHEMA, LINK_CAPTURE_SCHEMA
 from ....controller.project import Project
@@ -113,3 +116,40 @@ class LinkHandler:
         yield from link.delete()
         response.set_status(204)
         response.json(link)
+
+    @classmethod
+    @Route.get(
+        r"/projects/{project_id}/links/{link_id}/pcap",
+        parameters={
+            "project_id": "UUID for the project",
+            "link_id": "UUID of the link"
+        },
+        description="Get the pcap from the capture",
+        status_codes={
+            200: "Return the file",
+            403: "Permission denied",
+            404: "The file doesn't exist"
+        })
+    def pcap(request, response):
+
+        controller = Controller.instance()
+        project = controller.getProject(request.match_info["project_id"])
+        link = project.getLink(request.match_info["link_id"])
+
+        content = yield from link.read_pcap()
+        if content is None:
+            raise aiohttp.web.HTTPNotFound(text="pcap file not found")
+
+        response.content_type = "application/vnd.tcpdump.pcap"
+        response.set_status(200)
+        response.enable_chunked_encoding()
+        # Very important: do not send a content length otherwise QT close the connection but curl can consume the Feed
+        response.content_length = None
+
+        response.start(request)
+
+        while True:
+            chunk = yield from content.read(4096)
+            if not chunk:
+                yield from asyncio.sleep(0.1)
+            yield from response.write(chunk)

gns3server/templates/project.html

@@ -45,11 +45,13 @@ in futur GNS3 versions.
     <tr>
         <th>ID</td>
         <th>Capture</td>
+        <th>PCAP</td>
     </tr>
 {% for link in project.links.values() %}
 <tr>
     <td>{{link.id}}</td>
     <td>{{link.capturing}}</td>
+    <td><a href="/v2/projects/{{project.id}}/links/{{link.id}}/pcap">Download</a></td>
 </tr>
 {% endfor %}
 </table>