Add API(v1) to get real time log

JIRA: YARDSTICK-805

We need to get real time log if we use API(v1) run test case.

API: /yardstick/tasks/<task_id>/log
For example:
http://ip:port/yardstick/tasks/14795be8-f144-4f54-81ce-43f4e3eab33f/log?index=0

Change-Id: Ic0bf10f26f4f07d3264f2415c4923a1bfded2f81
Signed-off-by: chenjiankun <chenjiankun1@huawei.com>

1 files changed, 50 insertions, 0 deletions

diff --git a/api/resources/v1/tasks.py b/api/resources/v1/tasks.py
new file mode 100644
index 000000000..52455fbf5
--- /dev/null
+++ b/api/resources/v1/tasks.py
@@ -0,0 +1,50 @@
+##############################################################################
+# Copyright (c) 2016 Huawei Technologies Co.,Ltd and others.
+#
+# All rights reserved. This program and the accompanying materials
+# are made available under the terms of the Apache License, Version 2.0
+# which accompanies this distribution, and is available at
+# http://www.apache.org/licenses/LICENSE-2.0
+##############################################################################
+import os
+import errno
+import uuid
+
+from api import ApiResource
+from api.database.v1.handlers import TasksHandler
+from yardstick.common import constants as consts
+from yardstick.common.utils import result_handler
+
+
+class V1TaskLog(ApiResource):
+    def get(self, task_id):
+
+        try:
+            uuid.UUID(task_id)
+        except ValueError:
+            return result_handler(consts.API_ERROR, 'invalid task_id')
+
+        task_handler = TasksHandler()
+        try:
+            task = task_handler.get_task_by_taskid(task_id)
+        except ValueError:
+            return result_handler(consts.API_ERROR, 'invalid task_id')
+
+        index = int(self._get_args().get('index', 0))
+
+        try:
+            with open(os.path.join(consts.TASK_LOG_DIR, '{}.log'.format(task_id))) as f:
+                f.seek(index)
+                data = f.readlines()
+                index = f.tell()
+        except OSError as e:
+            if e.errno == errno.ENOENT:
+                return result_handler(consts.API_ERROR, 'log file does not exist')
+            return result_handler(consts.API_ERROR, 'error with log file')
+
+        return_data = {
+            'index': index,
+            'data': data
+        }
+
+        return result_handler(task.status, return_data)