diff --git a/src/readonlypart.h b/src/readonlypart.h
--- a/src/readonlypart.h
+++ b/src/readonlypart.h
@@ -305,6 +305,11 @@
      */
     void setUrl(const QUrl &url);
 
+    /**
+     * Convert the given url to local if it is an URL of an ioslave using UDS_LOCAL_PATH
+     */
+    QUrl mostLocalUrl(const QUrl &url) const;
+
     /**
      * Returns the local file path associated with this part.
      */
@@ -315,6 +320,11 @@
      */
     void setLocalFilePath(const QString &localFilePath);
 
+    /**
+     * Returns true if local file path is set for this part.
+     */
+    bool isLocalFile() const;
+
 protected:
     ReadOnlyPart(ReadOnlyPartPrivate &dd, QObject *parent);
 
diff --git a/src/readonlypart.cpp b/src/readonlypart.cpp
--- a/src/readonlypart.cpp
+++ b/src/readonlypart.cpp
@@ -65,11 +65,24 @@
     Q_D(ReadOnlyPart);
 
     if (d->m_url != url) {
-      d->m_url = url;
-      emit urlChanged(url);
+        d->m_url = url;
+
+        d->m_file.clear();
+        QUrl u = mostLocalUrl(d->m_url);
+        if (u.isLocalFile()) {
+            d->m_file = u.toLocalFile();
+        }
+
+        emit urlChanged(url);
     }
 }
 
+QUrl ReadOnlyPart::mostLocalUrl(const QUrl &url) const {
+    KIO::StatJob* statJob = KIO::mostLocalUrl(url);
+    statJob->exec();
+    return statJob->mostLocalUrl();
+}
+
 QString ReadOnlyPart::localFilePath() const
 {
     Q_D(const ReadOnlyPart);
@@ -84,6 +97,13 @@
     d->m_file = localFilePath;
 }
 
+bool ReadOnlyPart::isLocalFile() const
+{
+    Q_D(const ReadOnlyPart);
+
+    return !(d->m_file.isEmpty());
+}
+
 #if KPARTS_BUILD_DEPRECATED_SINCE(5, 0)
 bool ReadOnlyPart::isLocalFileTemporary() const
 {
@@ -144,12 +164,10 @@
         return false;
     }
     d->m_arguments = args;
-    setUrl(url);
 
-    d->m_file.clear();
+    setUrl(url);
 
-    if (d->m_url.isLocalFile()) {
-        d->m_file = d->m_url.toLocalFile();
+    if (isLocalFile()) {
         return d->openLocalFile();
     } else if (KProtocolInfo::protocolClass(url.scheme()) == QLatin1String(":local")) {
         // Maybe we can use a "local path", to avoid a temp copy?