feat(java-spring): restore file by url

CHANGELOG.md

@@ -1,5 +1,6 @@
 # Change Log
 
+- java-spring: restore by url
 - java: restore by url
 - golang: restore by url
 - csharp-mvc: restore by url

web/documentserver-example/java-spring/src/main/java/com/onlyoffice/integration/controllers/FileController.java

@@ -86,6 +86,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.InetAddress;
 import java.net.MalformedURLException;
+import java.net.URL;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
@@ -678,16 +679,25 @@ public class FileController {
             Path bumpedFile = Paths.get(bumpedVersionStringDirectory, previousBasename);
             Files.move(sourcePathFile, bumpedFile);
 
-            String recoveryVersionStringDirectory = historyManager.versionDir(
-                    historyDirectory,
-                    body.getVersion(),
-                    true
-            );
-            Path recoveryPathFile = Paths.get(recoveryVersionStringDirectory, previousBasename);
-            String recoveryStringFile = recoveryPathFile.toString();
-            FileInputStream recoveryStream = new FileInputStream(recoveryStringFile);
-            storageMutator.createFile(sourcePathFile, recoveryStream);
-            recoveryStream.close();
+            if (body.getUrl() != null) {
+                java.net.HttpURLConnection connection = (java.net.HttpURLConnection) new URL(body.getUrl())
+                    .openConnection();
+                InputStream stream = connection.getInputStream();
+                storageMutator.createFile(sourcePathFile, stream);
+                stream.close();
+                connection.disconnect();
+            } else {
+                String recoveryVersionStringDirectory = historyManager.versionDir(
+                        historyDirectory,
+                        body.getVersion(),
+                        true
+                );
+                Path recoveryPathFile = Paths.get(recoveryVersionStringDirectory, previousBasename);
+                String recoveryStringFile = recoveryPathFile.toString();
+                FileInputStream recoveryStream = new FileInputStream(recoveryStringFile);
+                storageMutator.createFile(sourcePathFile, recoveryStream);
+                recoveryStream.close();
+            }
 
             JSONObject responseBody = new JSONObject();
             responseBody.put("error", null);

web/documentserver-example/java-spring/src/main/java/com/onlyoffice/integration/dto/Restore.java

@@ -30,4 +30,5 @@ import lombok.Setter;
 public class Restore {
     private String fileName;
     private Integer version;
+    private String url;
 }

web/documentserver-example/java-spring/src/main/resources/templates/editor.html

@@ -298,7 +298,8 @@
                   const query = new URLSearchParams(window.location.search)
                   const payload = {
                     fileName: query.get('fileName'),
-                    version: event.data.version
+                    version: event.data.version,
+                    url: event.data.url
                   }
                   const request = new XMLHttpRequest()
                   request.open('PUT', 'restore')