def HandleAddSnippetSetRequest(self, request, response):
"""Handles add snippets set request.
Args:
request: request object.
response: response object.
Raises:
SnippetsServeException, psycopg2.Warning/Error.
"""
logger.debug("HandleAddSnippetSetRequest...")
snippets_set_name = request.GetIdentifier(constants.SNIPPET_SET_NAME)
if not snippets_set_name:
raise exceptions.SnippetsServeException(
"HandleAddSnippetSetRequest: missing or invalid snippet set name."
)
snippets_set = request.GetParameter(constants.SNIPPET_SET)
if not snippets_set:
raise exceptions.SnippetsServeException(
"HandleAddSnippetSetRequest: missing snippet set data.")
try:
# Dense snippets tree, since we accept snippets in client friendly form,
# i.e. sparse tree json.
dense_snippets = tree_utils.CompactTree(snippets_set, logger)
except Exception as e:
raise exceptions.SnippetsServeException(
"Couldn't parse snippet set: %s. Error: %s" %
(snippets_set_name, e))
set_content = json.dumps(dense_snippets)
if self._SnippetSetExists(snippets_set_name):
# It's ok if snippets set already exists. It means we edit existing one.
logger.debug("Update snippets set: %s", snippets_set_name)
query_string = "UPDATE snippet_set_table SET content = %s WHERE name = %s"
self._DbModify(query_string, (set_content, snippets_set_name))
else:
logger.debug("Add snippets set: %s", snippets_set_name)
query_string = (
"INSERT INTO snippet_set_table (name, content) VALUES(%s, %s)")
self._DbModify(query_string, (snippets_set_name, set_content))
snippets_set = basic_types.SnippetSet(snippets_set_name,
dense_snippets)
http_io.ResponseWriter.AddJsonBody(response, constants.STATUS_SUCCESS,
snippets_set)
def HandleDeleteSnippetSetRequest(self, request, response):
"""Handles delete snippets set request.
Args:
request: request object.
response: response object.
Raises:
SnippetsServeException, psycopg2.Warning/Error.
"""
logger.debug("HandleDeleteSnippetSetRequest...")
snippets_set_name = request.GetParameter(constants.SNIPPET_SET_NAME)
if not snippets_set_name:
raise exceptions.SnippetsServeException(
"HandleDeleteSnippetSetRequest: missing snippets set name.")
# Check if the snippets set exists. If it doesn't then just return success.
if not self._SnippetSetExists(snippets_set_name):
http_io.ResponseWriter.AddJsonBody(response,
constants.STATUS_SUCCESS, None)
return
# Delete the snippets set entry.
query_string = "DELETE FROM snippet_set_table WHERE name = %s"
self._DbModify(query_string, (snippets_set_name, ))
http_io.ResponseWriter.AddJsonBody(response, constants.STATUS_SUCCESS,
None)
def __ParsePostInput(self, post_input, request):
"""Parses POST request input.
Args:
post_input: POST request input.
request: request object to collect exptracted parameters.
Raises:
SnippetsServeException.
"""
post_dct = urlparse.parse_qs(post_input)
cmd = post_dct.get(constants.CMD, [""])[0]
if not cmd:
return
# Extract all the parameters for corrresponding command.
if cmd == constants.CMD_ADD_SNIPPET_SET:
logger.debug("%s: %s", constants.CMD, cmd)
logger.debug("%s: %s", constants.SNIPPET_SET_NAME,
post_dct.get(constants.SNIPPET_SET_NAME, [""])[0])
logger.debug("%s: %s", constants.SNIPPET_SET,
post_dct.get(constants.SNIPPET_SET, [""])[0])
request.SetParameter(
constants.SNIPPET_SET_NAME,
post_dct.get(constants.SNIPPET_SET_NAME, [""])[0])
request.SetParameter(constants.SNIPPET_SET,
post_dct.get(constants.SNIPPET_SET, [""])[0])
else:
raise exceptions.SnippetsServeException(
"Internal Error - Invalid Request Command: %s." % cmd)
request.SetParameter(constants.CMD, cmd)
def DoRequest(self, request, response):
"""Handles request by delegating it to manager."""
assert isinstance(request, http_io.Request)
assert isinstance(response, http_io.Response)
# Check for init failure and return an error status and appropriate message.
if not self._manager:
http_io.ResponseWriter.AddJsonFailureBody(
response,
"Server-side Internal Error: Failure to init SnippetsHandler")
return
try:
cmd = request.GetParameter(constants.CMD)
if not cmd:
raise exceptions.StreamPublisherServletException(
"Internal Error - Missing Request Command.")
if cmd == constants.CMD_QUERY:
self._manager.HandleQueryRequest(request, response)
elif cmd == constants.CMD_PING:
self._manager.HandlePingRequest(request, response)
elif cmd == constants.CMD_ADD_SNIPPET_SET:
self._manager.HandleAddSnippetSetRequest(
request, response)
elif cmd == constants.CMD_DELETE_SNIPPET_SET:
self._manager.HandleDeleteSnippetSetRequest(
request, response)
else:
raise exceptions.SnippetsServeException(
"Invalid Request Command: {}.".format(cmd))
except exceptions.SnippetsServeException as e:
logger.error(e)
http_io.ResponseWriter.AddJsonFailureBody(response, str(e))
except (psycopg2.Warning, psycopg2.Error) as e:
logger.error(e)
http_io.ResponseWriter.AddJsonFailureBody(
response,
"Database error: {}".format(e))
except Exception as e:
logger.error(e)
http_io.ResponseWriter.AddJsonFailureBody(
response, "Server-side Internal Error: {}".format(e))
def HandleQueryRequest(self, request, response):
"""Handles query requests.
Args:
request: request object.
response: response object
Raises:
SnippetsServeException, psycopg2.Error/Warning.
"""
query_cmd = request.GetParameter(constants.QUERY_CMD)
if not query_cmd:
raise exceptions.SnippetsServeException(
"Internal Error - Missing Query Command.")
# List all snippets sets registered on the server.
if query_cmd == constants.QUERY_CMD_LIST_SNIPPET_SETS:
query_string = "SELECT name, content FROM snippet_set_table"
results = self._DbQuery(query_string)
snippets_set_list = [
self.__BuildSnippetSetObj(row[0], row[1]) for row in results
]
http_io.ResponseWriter.AddJsonBody(response,
constants.STATUS_SUCCESS,
snippets_set_list)
# Preview details for a specific snippets set.
elif query_cmd == constants.QUERY_CMD_SNIPPET_SET_DETAILS:
snippets_set_name = request.GetParameter(
constants.SNIPPET_SET_NAME)
if not snippets_set_name:
raise exceptions.SnippetsServeException(
"HandleQueryRequest: missing snippets set name.")
end_snippet = self.GetSnippetSetDetails(snippets_set_name)
if not end_snippet:
raise exceptions.SnippetsServeException(
"The snippet set %s does not exist." % snippets_set_name)
logger.debug("Snippet set name: %s", snippets_set_name)
logger.debug("End snippet: %s", end_snippet)
snippets_set = self.__BuildSnippetSetObj(snippets_set_name,
end_snippet)
http_io.ResponseWriter.AddJsonBody(response,
constants.STATUS_SUCCESS,
snippets_set)
# List paths of metafields available for editing.
elif query_cmd == constants.QUERY_CMD_LIST_META_FIELD_PATHS:
meta_fields_obj = json.loads(metainfo_by_fieldpath.META_INFO)
field_paths_list = meta_fields_obj.keys()
field_paths_json = json.dumps(field_paths_list,
indent=2,
separators=(",", ":"))
logger.debug("Meta field paths: %s", field_paths_json)
http_io.ResponseWriter.AddJsonBody(response,
constants.STATUS_SUCCESS,
field_paths_json)
# List metafields available for editing.
elif query_cmd == constants.QUERY_CMD_META_FIELDS_SET:
meta_fields_obj = json.loads(metainfo_by_fieldpath.META_INFO)
meta_fields_json = json.dumps(meta_fields_obj,
indent=2,
separators=(",", ":"))
logger.debug("Meta fields: %s", meta_fields_json)
http_io.ResponseWriter.AddJsonBody(response,
constants.STATUS_SUCCESS,
meta_fields_json)
else:
raise exceptions.SnippetsServeException(
"Invalid Query Command: %s." % query_cmd)
