client,webserver: Make log downloads work in a webview.

	* Make distinct log file names with a timestamp

	* Explicitly set browser context to '_self' for
	  a webview.

client/webserver/api.go

@@ -2045,9 +2045,14 @@ func (s *WebServer) apiTakeAction(w http.ResponseWriter, r *http.Request) {
 	writeJSON(w, simpleAck())
 }
 
-// apiExportAppLogs zips the application log and sends it back to the browser.
+// apiExportAppLogs time stamps the application log, zips it and sends it back to
+// the browser or webview as an attachment. Logfile names need to be distinct as
+// webview will not overwite an existing file.
 func (s *WebServer) apiExportAppLogs(w http.ResponseWriter, r *http.Request) {
-	w.Header().Set("Content-Disposition", "attachment; filename=bwlog.zip")
+	timeStamp := time.Now().UnixMilli()
+	zipAttachment := fmt.Sprintf("attachment; filename=bwlog_%d.zip", timeStamp)
+
+	w.Header().Set("Content-Disposition", zipAttachment)
 	w.Header().Set("Content-Type", "application/octet-stream; type=zip")
 	w.WriteHeader(http.StatusOK)
 

client/webserver/site/src/js/settings.ts

@@ -475,10 +475,16 @@ export default class SettingsPage extends BasePage {
     Doc.show(form)
   }
 
+  /* exportLogs zips the main app log and sends it back as an attachment */
   async exportLogs () {
     const url = new URL(window.location.href)
     url.pathname = '/api/exportapplog'
-    window.open(url.toString())
+    const target = '_self'
+    if (window.isWebview !== undefined) {
+      window.open(url.toString(), target) // explicit
+    } else {
+      window.open(url.toString())
+    }
   }
 
   async submitGameCode () {