BUGFIX fix incorrect url of default avatar or background images

layouts/partials/header.html

@@ -1,4 +1,11 @@
-<div class="jumbotron" style="background-image: url({{ .Site.Params.cover }});">
+{{ $background_path :=  "default-background.png" }}
+{{ with .Site.Params.cover }}
+    {{ $background_path = . }}
+{{ end }}
+{{ if resources.Get $background_path }}
+    {{ $background_path = (resources.Get $background_path).Permalink }}
+{{ end }}
+<div class="jumbotron" style="background-image: url({{ $background_path }});">
     <div class="container">
         <div class="site-title">{{ .Site.Params.title }}</div>
         <p class="signature">{{ .Site.Params.signature }}</p>

layouts/partials/row.html

@@ -25,12 +25,17 @@
                 {{/* user info */}}
                 <div class="user-info">
                     <div class="avatar-block">
-                        {{ with $page.Params.avatar }}
-                        <img src='{{ . }}' class="avatar">
-                        {{ else }}
-                        {{/* fixme check whether the default avatar path is url or not--> */}}
-                        <img src='{{ $page.Site.BaseURL }}/{{ $page.Site.Params.avatar }}' class="avatar">
+                        {{ $avatar_path :=  "default-avatar.png" }}
+                        {{ with .Site.Params.avatar }}
+                            {{ $avatar_path = . }}
                         {{ end }}
+                        {{ with $page.Params.avatar }}
+                            {{ $avatar_path = . }}
+                        {{ end }}
+                        {{ if resources.Get $avatar_path }}
+                            {{ $avatar_path = (resources.Get $avatar_path).Permalink }}
+                        {{ end }}
+                        <img src='{{ $avatar_path }}' class="avatar">
                     </div>
                     <div class="intro">
                         <div class="name">