[webapp] Adding a work around for calling kudu to warm up (#48)

* Adding a call to scm to warm up kudu for zipdeploy

updating index.json

* Adding a fix to skip zip & deploy if we detect the contents are not node
app

* index.json update

* style fixes plus index update

* bug fix

src/index.json

@@ -370,9 +370,9 @@
         ],
         "webapp": [
             {
-                "filename": "webapp-0.0.6-py2.py3-none-any.whl",
-                "sha256Digest": "65ffc1f0c34bb4b7b3fa0e3d3b3c49b745d8b46d04c2653ae0e0a22d01329669",
-                "downloadUrl": "https://github.com/panchagnula/azure-cli-extensions/raw/sisirap-extensions-whl/dist/webapp-0.0.6-py2.py3-none-any.whl",
+                "filename": "webapp-0.0.7-py2.py3-none-any.whl",
+                "sha256Digest": "11090b2d19d2082f86249bbf06566bd3924e4c976ac47c95e34ecd82541944c8",
+                "downloadUrl": "https://github.com/panchagnula/azure-cli-extensions/raw/sisirap-extensions-whl/dist/webapp-0.0.7-py2.py3-none-any.whl",
                 "metadata": {
                     "classifiers": [
                       "Development Status :: 4 - Beta",
@@ -409,7 +409,7 @@
                     "metadata_version": "2.0",
                     "name": "webapp",
                     "summary": "An Azure CLI Extension to manage appservice resources",
-                    "version": "0.0.6"
+                    "version": "0.0.7"
                 }
             }
         ]

src/webapp/azext_webapp/create_util.py

@@ -83,3 +83,11 @@ def check_if_asp_exists(cmd, rg_name, asp_name):
         if item.name == asp_name:
             return True
     return False
+
+
+def check_app_exists(cmd, rg_name, app_name):
+    client = web_client_factory(cmd.cli_ctx)
+    for item in list(client.web_apps.list_by_resource_group(rg_name)):
+        if item.name == app_name:
+            return True
+    return False

src/webapp/azext_webapp/custom.py

@@ -12,6 +12,8 @@
     enable_zip_deploy,
     create_webapp,
     update_app_settings,
+    _get_site_credential,
+    _get_scm_url,
     _get_sku_name)
 
 from .create_util import (
@@ -22,6 +24,7 @@
     check_resource_group_exists,
     check_resource_group_supports_linux,
     check_if_asp_exists,
+    check_app_exists,
     web_client_factory
 )
 
@@ -126,20 +129,37 @@ def create_deploy_webapp(cmd, name, location=None, dryrun=False):
         logger.warning("App service plan '%s' already exists.", asp)
 
     # create the Linux app
-    logger.warning("Creating app '%s' ....", name)
-    create_webapp(cmd, rg_name, name, asp, runtime_version)
-    logger.warning("Webapp creation complete")
+    if not check_app_exists(cmd, rg_name, name):
+        logger.warning("Creating app '%s' ....", name)
+        create_webapp(cmd, rg_name, name, asp, runtime_version)
+        logger.warning("Webapp creation complete")
+    else:
+        logger.warning("App '%s' already exists", name)
 
     # setting to build after deployment
     logger.warning("Updating app settings to enable build after deployment")
     update_app_settings(cmd, rg_name, name, ["SCM_DO_BUILD_DURING_DEPLOYMENT=true"])
+    # work around until the timeout limits issue for linux is investigated & fixed
+    # wakeup kudu, by making an SCM call
+
+    import requests
+    # work around until the timeout limits issue for linux is investigated & fixed
+    user_name, password = _get_site_credential(cmd.cli_ctx, rg_name, name)
+    scm_url = _get_scm_url(cmd, rg_name, name)
+    import urllib3
+    authorization = urllib3.util.make_headers(basic_auth='{0}:{1}'.format(user_name, password))
+    requests.get(scm_url + '/api/settings', headers=authorization)
+
+    if package_json_path != '':
+        logger.warning("Creating zip with contents of dir %s ...", src_dir)
+        # zip contents & deploy
+        zip_file_path = zip_contents_from_dir(src_dir)
+
+        logger.warning("Deploying and building contents to app."
+                       "This operation can take some time to finish...")
+        enable_zip_deploy(cmd, rg_name, name, zip_file_path)
+    else:
+        logger.warning("No package.json found, skipping zip and deploy process")
 
-    # zip contents & deploy
-    logger.warning("Creating zip with contents of dir %s ...", src_dir)
-    zip_file_path = zip_contents_from_dir(src_dir)
-
-    logger.warning("Deploying and building contents to app."
-                   "This operation can take some time to finish...")
-    enable_zip_deploy(cmd, rg_name, name, zip_file_path)
     logger.warning("All done. %s", create_json)
     return None

src/webapp/setup.py

@@ -8,7 +8,7 @@
 from codecs import open
 from setuptools import setup, find_packages
 
-VERSION = "0.0.6"
+VERSION = "0.0.7"
 
 CLASSIFIERS = [
     'Development Status :: 4 - Beta',