Override PUT so it doesn't change the file extension

Fixes #282 and HER-1907

engine/src/main/java/org/archive/crawler/restlet/EnhDirectoryResource.java

@@ -21,6 +21,8 @@
 package org.archive.crawler.restlet;
 
 import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.FileOutputStream;
 import java.io.IOException;
 import java.net.URI;
 import java.util.LinkedList;
@@ -153,4 +155,28 @@ public class EnhDirectoryResource extends DirectoryServerResource {
         getResponse().redirectSeeOther(ref);
         return new EmptyRepresentation();
     }
+
+    /*
+     * XXX: We override Restlet's default PUT behaviour (see FileClientHelper.handleFilePut) as it unhelpfully changes
+     * the file extension based on the content-type and there's no apparent way to disable that.
+     */
+    @Override
+    public Representation put(Representation entity) throws ResourceException {
+        File file = new File(URI.create(getTargetUri()));
+        if (getTargetUri().endsWith("/") || file.isDirectory()) {
+            return super.put(entity);
+        }
+        boolean created = !file.exists();
+        try (FileOutputStream out = new FileOutputStream(file)) {
+            entity.write(out);
+        } catch (FileNotFoundException e) {
+            throw new ResourceException(Status.CLIENT_ERROR_NOT_FOUND, e);
+        } catch (IOException e) {
+            throw new ResourceException(Status.SERVER_ERROR_INTERNAL, e);
+        }
+        if (created) {
+            getResponse().setStatus(Status.SUCCESS_CREATED);
+        }
+        return new EmptyRepresentation();
+    }
 }