Fix for issue 6487: Opening BibTex file (doubleclick) from Folder with spaces not working

CHANGELOG.md

@@ -65,6 +65,7 @@ Note that this project **does not** adhere to [Semantic Versioning](http://semve
 - We fixed an issue where columns shrink in width when we try to enlarge JabRef window. [#6818](https://github.com/JabRef/jabref/issues/6818)
 - We fixed an issue where Content selector does not seem to work for custom fields. [#6819](https://github.com/JabRef/jabref/issues/6819)
 - We fixed an issue in which a linked online file consisting of a web page was saved as an invalid pdf file upon being downloaded. The user is now notified when downloading a linked file results in an HTML file. [#7452](https://github.com/JabRef/jabref/issues/7452)
+- We fixed an issue where opening BibTex file (doubleclick) from Folder with spaces not working. [#6487](https://github.com/JabRef/jabref/issues/6487)
 
 ### Removed
 

src/main/java/org/jabref/logic/remote/shared/Protocol.java

@@ -4,6 +4,9 @@
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.net.Socket;
+import java.net.URLDecoder;
+import java.net.URLEncoder;
+import java.nio.charset.StandardCharsets;
 
 import javafx.util.Pair;
 
@@ -39,7 +42,19 @@ public void sendMessage(RemoteMessage type) throws IOException {
 
     public void sendMessage(RemoteMessage type, Object argument) throws IOException {
         out.writeObject(type);
-        out.writeObject(argument);
+
+        // encode the commandline arguments to handle special characters (eg. spaces and Chinese characters)
+        // related to issue #6487
+        if (type == RemoteMessage.SEND_COMMAND_LINE_ARGUMENTS) {
+            String[] encodedArgs = ((String[]) argument).clone();
+            for (int i = 0; i < encodedArgs.length; i++) {
+                encodedArgs[i] = URLEncoder.encode(encodedArgs[i], StandardCharsets.UTF_8);
+            }
+            out.writeObject(encodedArgs);
+        } else {
+            out.writeObject(argument);
+        }
+
         out.write('\0');
         out.flush();
     }
@@ -50,6 +65,13 @@ public Pair<RemoteMessage, Object> receiveMessage() throws IOException {
             Object argument = in.readObject();
             int endOfMessage = in.read();
 
+            // decode the received commandline arguments
+            if (type == RemoteMessage.SEND_COMMAND_LINE_ARGUMENTS) {
+                for (int i = 0; i < ((String[]) argument).length; i++) {
+                    ((String[]) argument)[i] = URLDecoder.decode(((String[]) argument)[i], StandardCharsets.UTF_8);
+                }
+            }
+
             if (endOfMessage != '\0') {
                 throw new IOException("Message didn't end on correct end of message identifier. Got " + endOfMessage);
             }

src/test/java/org/jabref/logic/remote/RemoteCommunicationTest.java

@@ -73,4 +73,14 @@ void commandLineArgumentMultiLinePassedToServer() {
 
         verify(server).handleCommandLineArguments(message);
     }
+
+    @Test
+    void commandLineArgumentEncodingAndDecoding() {
+        final String[] message = new String[]{"D:\\T EST\\测试te st.bib"};
+
+        // will be encoded as "D%3A%5CT+EST%5C%E6%B5%8B%E8%AF%95te+st.bib"
+        client.sendCommandLineArguments(message);
+
+        verify(server).handleCommandLineArguments(message);
+    }
 }