diff --git a/docker/scripts/init_config.py b/docker/scripts/init_config.py
index 904caf9..6d7ee97 100644
--- a/docker/scripts/init_config.py
+++ b/docker/scripts/init_config.py
@@ -95,6 +95,10 @@
     # location /thumbnail/ {
     #     proxy_pass https://thumbnail.seatable.cn/thumbnail/;
     # }
+    #
+    # location /dtable-plugins/ {
+    #     proxy_pass https://thumbnail.seatable.cn/dtable-plugins/;
+    # }
 
 }
 """
diff --git a/seatable_thumbnail/http_response.py b/seatable_thumbnail/http_response.py
index c026015..d59ed76 100644
--- a/seatable_thumbnail/http_response.py
+++ b/seatable_thumbnail/http_response.py
@@ -54,7 +54,7 @@ def gen_thumbnail_response(thumbnail, etag, last_modified):
 
 
 def gen_plugin_response(plugin, content_type, etag, last_modified):
-    response_start = gen_response_start(200, content_type)
+    response_start = gen_response_start(200, content_type.encode('utf-8'))
     response_body = gen_response_body(plugin)
 
     # cache
diff --git a/seatable_thumbnail/plugin.py b/seatable_thumbnail/plugin.py
new file mode 100644
index 0000000..ef6e2a5
--- /dev/null
+++ b/seatable_thumbnail/plugin.py
@@ -0,0 +1,27 @@
+import requests
+import urllib.request
+import urllib.parse
+
+from seaserv import seafile_api
+import seatable_thumbnail.settings as settings
+from seatable_thumbnail.constants import EMPTY_BYTES
+
+
+class Plugin(object):
+    def __init__(self, **info):
+        self.__dict__.update(info)
+        self.body = EMPTY_BYTES
+        self.get()
+
+    def get(self):
+        self.get_inner_path()
+        response = requests.get(self.inner_path)
+        self.body = response.content
+
+    def get_inner_path(self):
+        token = seafile_api.get_fileserver_access_token(
+            settings.PLUGINS_REPO_ID, self.file_id, 'view', '', use_onetime=True)
+        if not token:
+            raise ValueError(404, 'token not found.')
+        self.inner_path = '%s/files/%s/%s' % (
+            settings.INNER_FILE_SERVER_ROOT.rstrip('/'), token, urllib.parse.quote(self.file_path.lstrip('/')))
diff --git a/seatable_thumbnail/serializers.py b/seatable_thumbnail/serializers.py
index 0e5304a..df64725 100644
--- a/seatable_thumbnail/serializers.py
+++ b/seatable_thumbnail/serializers.py
@@ -7,7 +7,7 @@
 
 from seaserv import seafile_api
 import seatable_thumbnail.settings as settings
-from seatable_thumbnail.constants import FILE_EXT_TYPE_MAP, \
+from seatable_thumbnail.constants import TEXT_CONTENT_TYPE, FILE_EXT_TYPE_MAP, \
     IMAGE, PSD, VIDEO, XMIND
 from seatable_thumbnail.models import Workspaces, DjangoSession, DTableSystemPlugins
 
@@ -157,7 +157,7 @@ def params_check(self):
         plugin_name = self.request.url.split('/')[1]
         timestamp = self.request.query_dict['t'][0] if self.request.query_dict.get('t') else ''
         version = self.request.query_dict['version'][0] if self.request.query_dict.get('version') else ''
-        content_type = mimetypes.guess_type(path)
+        content_type = mimetypes.guess_type(path)[0] if mimetypes.guess_type(path) else TEXT_CONTENT_TYPE.decode('utf-8')
 
         self.params = {
             'path': path,
@@ -175,18 +175,18 @@ def resource_check(self):
             DTableSystemPlugins).filter_by(name=plugin_name).first()
 
         file_path ='/' + plugin.name + path
-        repo_id = settings.PLUGINS_REPO_ID
-        file_id = seafile_api.get_file_id_by_path(repo_id, file_path)
+        file_id = seafile_api.get_file_id_by_path(settings.PLUGINS_REPO_ID, file_path)
         if not file_id:
             raise ValueError(404, 'file_id not found.')        
 
-        info = json.loads(plugin.info)
-        last_modified = info['last_modified']
+        file_info = json.loads(plugin.info)
+        last_modified = file_info['last_modified']
         etag = '"' + file_id + '"'
 
         self.resource = {
+            'file_path': file_path,
             'file_id': file_id,
-            'info': info,
+            'file_info': file_info,
             'last_modified': last_modified,
             'etag': etag,
         }
\ No newline at end of file