1) Fixed import/export servers issue in server mode.

2) Fixed an issue where files are not showing as per the selected format in
   the file dialog when opened the first time.

web/pgadmin/misc/file_manager/static/js/utility.js

@@ -1985,7 +1985,7 @@ define([
 
         let response = getFileFormat(this.config.options.allowed_file_types);
         let lastSelectedFormat =  response.responseJSON.info;
-        if (_.isUndefined(lastSelectedFormat))
+        if (_.isUndefined(lastSelectedFormat) || allowed_types.indexOf(lastSelectedFormat) < 0)
           set_type = allowed_types[0];
         else
           set_type = lastSelectedFormat;

web/pgadmin/tools/import_export_servers/__init__.py

@@ -24,6 +24,8 @@ from pgadmin.utils.ajax import make_json_response, internal_server_error
 from pgadmin.model import ServerGroup, Server
 from pgadmin.utils import clear_database_servers, dump_database_servers,\
     load_database_servers, validate_json_data
+from urllib.parse import unquote
+from pgadmin.utils.paths import get_storage_directory
 
 MODULE_NAME = 'import_export_servers'
 
@@ -130,9 +132,20 @@ def load_servers():
     if 'filename' in data:
         filename = data['filename']
 
-    if filename is not None and os.path.exists(filename):
+    file_path = unquote(filename)
+
+    # retrieve storage directory path
+    storage_manager_path = get_storage_directory()
+    if storage_manager_path:
+        # generate full path of file
+        file_path = os.path.join(
+            storage_manager_path,
+            file_path.lstrip('/').lstrip('\\')
+        )
+
+    if file_path is not None and os.path.exists(file_path):
         try:
-            with open(filename, 'r') as j:
+            with open(file_path, 'r') as j:
                 data = json.loads(j.read())
 
                 # Validate the json file and data

web/pgadmin/utils/__init__.py

@@ -22,8 +22,8 @@ from threading import Lock
 from .paths import get_storage_directory
 from .preferences import Preferences
 from pgadmin.utils.constants import UTILITIES_ARRAY, USER_NOT_FOUND
-from pgadmin.model import db, User, Version, ServerGroup, Server, \
-    SCHEMA_VERSION as CURRENT_SCHEMA_VERSION
+from pgadmin.model import db, User, ServerGroup, Server
+from urllib.parse import unquote
 
 ADD_SERVERS_MSG = "Added %d Server Group(s) and %d Server(s)."
 
@@ -450,20 +450,36 @@ def dump_database_servers(output_file, selected_servers,
 
     object_dict["Servers"] = server_dict
 
-    f = None
-    try:
-        f = open(output_file, "w")
-    except Exception as e:
-        return _handle_error("Error opening output file %s: [%d] %s" %
-                             (output_file, e.errno, e.strerror), from_setup)
+    # retrieve storage directory path
+    storage_manager_path = get_storage_directory()
 
-    try:
-        f.write(json.dumps(object_dict, indent=4))
-    except Exception as e:
-        return _handle_error("Error writing output file %s: [%d] %s" %
-                             (output_file, e.errno, e.strerror), from_setup)
+    # generate full path of file
+    file_path = unquote(output_file)
 
-    f.close()
+    from pgadmin.misc.file_manager import Filemanager
+    try:
+        Filemanager.check_access_permission(storage_manager_path, file_path)
+    except Exception as e:
+        return _handle_error(str(e), from_setup)
+
+    if storage_manager_path is not None:
+        file_path = os.path.join(
+            storage_manager_path,
+            file_path.lstrip('/').lstrip('\\')
+        )
+
+    # write to file
+    file_content = json.dumps(object_dict, indent=4)
+    error_str = gettext("Error: {0}")
+    try:
+        with open(file_path, 'w') as output_file:
+            output_file.write(file_content)
+    except IOError as e:
+        err_msg = error_str.format(e.strerror)
+        return _handle_error(err_msg, from_setup)
+    except Exception as e:
+        err_msg = error_str.format(e.strerror)
+        return _handle_error(err_msg, from_setup)
 
     msg = "Configuration for %s servers dumped to %s." % \
           (servers_dumped, output_file)
@@ -541,15 +557,26 @@ def load_database_servers(input_file, selected_servers,
                           load_user=current_user, from_setup=False):
     """Load server groups and servers.
     """
+    # retrieve storage directory path
+    storage_manager_path = get_storage_directory()
+    # generate full path of file
+    file_path = unquote(input_file)
+    if storage_manager_path:
+        # generate full path of file
+        file_path = os.path.join(
+            storage_manager_path,
+            file_path.lstrip('/').lstrip('\\')
+        )
+
     try:
-        with open(input_file) as f:
+        with open(file_path) as f:
             data = json.load(f)
     except json.decoder.JSONDecodeError as e:
         return _handle_error("Error parsing input file %s: %s" %
-                             (input_file, e), from_setup)
+                             (file_path, e), from_setup)
     except Exception as e:
         return _handle_error("Error reading input file %s: [%d] %s" %
-                             (input_file, e.errno, e.strerror), from_setup)
+                             (file_path, e.errno, e.strerror), from_setup)
 
     f.close()