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Stream pcap from compute to controller to client

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This commit is contained in:
Julien Duponchelle 2016-04-22 16:22:03 +02:00
parent 48e71617d6
commit 1ce576c020
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GPG Key ID: CE8B29639E07F5E8
15 changed files with 172 additions and 124 deletions
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4
gns3server/compute/project.py
View File

@ -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:

16
gns3server/controller/compute.py
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@ -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:

7
gns3server/controller/link.py
View File

@ -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

9
gns3server/controller/udp_link.py
View File

@ -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())

1
gns3server/handlers/api/compute/__init__.py
View File

@ -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

59
gns3server/handlers/api/compute/file_handler.py
View File

@ -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))

44
gns3server/handlers/api/compute/project_handler.py
View File

@ -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:.+}",

40
gns3server/handlers/api/controller/link_handler.py
View File

@ -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)

2
gns3server/templates/project.html
View File

@ -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>

8
tests/controller/test_compute.py
View File

@ -179,3 +179,11 @@ def test_json(compute):
"user": "test",
"connected": True
}
def test_streamFile(project, async_run, compute):
response = MagicMock()
response.status = 200
with asyncio_patch("aiohttp.ClientSession.request", return_value=response) as mock:
async_run(compute.streamFile(project, "test/titi"))
mock.assert_called_with("GET", "https://example.com:84/v2/compute/projects/{}/stream/test/titi".format(project.id), auth=None)

1
tests/controller/test_link.py
View File

@ -18,6 +18,7 @@
import pytest
from unittest.mock import MagicMock
from gns3server.controller.link import Link
from gns3server.controller.vm import VM
from gns3server.controller.compute import Compute

15
tests/controller/test_udp_link.py
View File

@ -19,6 +19,7 @@ import pytest
import asyncio
import aiohttp
from unittest.mock import MagicMock
from tests.utils import asyncio_patch
from gns3server.controller.project import Project
from gns3server.controller.compute import Compute
@ -160,3 +161,17 @@ def test_capture(async_run, project):
assert link.capturing is False
compute1.post.assert_any_call("/projects/{}/iou/vms/{}/adapters/3/ports/1/stop_capture".format(project.id, vm_iou.id))
def test_read_pcap(project, async_run):
compute1 = MagicMock()
link = UDPLink(project)
async_run(link.addVM(compute1, 0, 4))
async_run(link.addVM(compute1, 3, 1))
capture = async_run(link.start_capture())
assert link._capture_vm is not None
async_run(link.read_pcap())
link._capture_vm["vm"].compute.streamFile.assert_called_with(project, "tmp/captures/" + link.capture_file_name())

62
tests/handlers/api/compute/test_file.py
View File

@ -1,62 +0,0 @@
# -*- coding: utf-8 -*-
#
# 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/>.
"""
This test suite check /files endpoint
"""
import json
import asyncio
import aiohttp
from gns3server.version import __version__
def test_stream(http_compute, tmpdir, loop):
with open(str(tmpdir / "test"), 'w+') as f:
f.write("hello")
def go(future):
query = json.dumps({"location": str(tmpdir / "test")})
headers = {'content-type': 'application/json'}
response = yield from aiohttp.request("GET", http_compute.get_url("/files/stream"), data=query, headers=headers)
response.body = yield from response.content.read(5)
with open(str(tmpdir / "test"), 'a') as f:
f.write("world")
response.body += yield from response.content.read(5)
response.close()
future.set_result(response)
future = asyncio.Future()
asyncio.async(go(future))
response = loop.run_until_complete(future)
assert response.status == 200
assert response.body == b'helloworld'
def test_stream_file_not_found(http_compute, tmpdir, loop):
def go(future):
query = json.dumps({"location": str(tmpdir / "test")})
headers = {'content-type': 'application/json'}
response = yield from aiohttp.request("GET", http_compute.get_url("/files/stream"), data=query, headers=headers)
response.close()
future.set_result(response)
future = asyncio.Future()
asyncio.async(go(future))
response = loop.run_until_complete(future)
assert response.status == 404

19
tests/handlers/api/compute/test_project.py
View File

@ -218,6 +218,25 @@ def test_get_file(http_compute, tmpdir):
assert response.status == 403
def test_stream_file(http_compute, tmpdir):
with patch("gns3server.config.Config.get_section_config", return_value={"project_directory": str(tmpdir)}):
project = ProjectManager.instance().create_project(project_id="01010203-0405-0607-0809-0a0b0c0d0e0b")
with open(os.path.join(project.path, "hello"), "w+") as f:
f.write("world")
response = http_compute.get("/projects/{project_id}/files/hello".format(project_id=project.id), raw=True)
assert response.status == 200
assert response.body == b"world"
response = http_compute.get("/projects/{project_id}/files/false".format(project_id=project.id), raw=True)
assert response.status == 404
response = http_compute.get("/projects/{project_id}/files/../hello".format(project_id=project.id), raw=True)
assert response.status == 403
def test_export(http_compute, tmpdir, loop, project):
os.makedirs(project.path, exist_ok=True)

9
tests/handlers/api/controller/test_link.py
View File

@ -95,6 +95,15 @@ def test_stop_capture(http_controller, tmpdir, project, compute, async_run):
assert response.status == 204
def test_pcap(http_controller, tmpdir, project, compute, async_run):
link = Link(project)
link
project._links = {link.id: link}
with asyncio_patch("gns3server.controller.link.Link.read_pcap", return_value=None) as mock:
response = http_controller.get("/projects/{}/links/{}/pcap".format(project.id, link.id), example=True)
assert mock.called
def test_delete_link(http_controller, tmpdir, project, compute, async_run):
link = Link(project)