diff --git a/config/file_header.json b/config/file_header.json
new file mode 100644
index 00000000..8c9caf4b
--- /dev/null
+++ b/config/file_header.json
@@ -0,0 +1,140 @@
+{
+  "ai": "application/postscript",
+  "aif": "audio/x-aiff",
+  "aifc": "audio/x-aiff",
+  "aiff": "audio/x-aiff",
+  "asc": "text/plain",
+  "au": "audio/basic",
+  "avi": "video/x-msvideo",
+  "bcpio": "application/x-bcpio",
+  "bin": "application/octet-stream",
+  "bmp": "image/bmp",
+  "cdf": "application/x-netcdf",
+  "class": "application/octet-stream",
+  "cpio": "application/x-cpio",
+  "cpt": "application/mac-compactpro",
+  "csh": "application/x-csh",
+  "css": "text/css",
+  "dcr": "application/x-director",
+  "dir": "application/x-director",
+  "djv": "image/vnd.djvu",
+  "djvu": "image/vnd.djvu",
+  "dll": "application/octet-stream",
+  "dms": "application/octet-stream",
+  "doc": "application/msword",
+  "dvi": "application/x-dvi",
+  "dxr": "application/x-director",
+  "eps": "application/postscript",
+  "etx": "text/x-setext",
+  "exe": "application/octet-stream",
+  "ez": "application/andrew-inset",
+  "gif": "image/gif",
+  "gtar": "application/x-gtar",
+  "hdf": "application/x-hdf",
+  "hqx": "application/mac-binhex40",
+  "htm": "text/html",
+  "html": "text/html",
+  "ice": "x-conference/x-cooltalk",
+  "ief": "image/ief",
+  "iges": "model/iges",
+  "igs": "model/iges",
+  "jpe": "image/jpeg",
+  "jpeg": "image/jpeg",
+  "jpg": "image/jpeg",
+  "js": "application/x-javascript",
+  "kar": "audio/midi",
+  "latex": "application/x-latex",
+  "lha": "application/octet-stream",
+  "lzh": "application/octet-stream",
+  "m3u": "audio/x-mpegurl",
+  "man": "application/x-troff-man",
+  "me": "application/x-troff-me",
+  "mesh": "model/mesh",
+  "mid": "audio/midi",
+  "midi": "audio/midi",
+  "mif": "application/vnd.mif",
+  "mov": "video/quicktime",
+  "movie": "video/x-sgi-movie",
+  "mp2": "audio/mpeg",
+  "mp3": "audio/mpeg",
+  "mpe": "video/mpeg",
+  "mpeg": "video/mpeg",
+  "mpg": "video/mpeg",
+  "mpga": "audio/mpeg",
+  "ms": "application/x-troff-ms",
+  "msh": "model/mesh",
+  "mxu": "video/vnd.mpegurl",
+  "nc": "application/x-netcdf",
+  "oda": "application/oda",
+  "pbm": "image/x-portable-bitmap",
+  "pdb": "chemical/x-pdb",
+  "pdf": "application/pdf",
+  "pgm": "image/x-portable-graymap",
+  "pgn": "application/x-chess-pgn",
+  "png": "image/png",
+  "pnm": "image/x-portable-anymap",
+  "ppm": "image/x-portable-pixmap",
+  "ppt": "application/vnd.ms-powerpoint",
+  "ps": "application/postscript",
+  "qt": "video/quicktime",
+  "ra": "audio/x-realaudio",
+  "ram": "audio/x-pn-realaudio",
+  "ras": "image/x-cmu-raster",
+  "rgb": "image/x-rgb",
+  "rm": "audio/x-pn-realaudio",
+  "roff": "application/x-troff",
+  "rpm": "audio/x-pn-realaudio-plugin",
+  "rtf": "text/rtf",
+  "rtx": "text/richtext",
+  "sgm": "text/sgml",
+  "sgml": "text/sgml",
+  "sh": "application/x-sh",
+  "shar": "application/x-shar",
+  "silo": "model/mesh",
+  "sit": "application/x-stuffit",
+  "skd": "application/x-koan",
+  "skm": "application/x-koan",
+  "skp": "application/x-koan",
+  "skt": "application/x-koan",
+  "smi": "application/smil",
+  "smil": "application/smil",
+  "snd": "audio/basic",
+  "so": "application/octet-stream",
+  "spl": "application/x-futuresplash",
+  "src": "application/x-wais-source",
+  "sv4cpio": "application/x-sv4cpio",
+  "sv4crc": "application/x-sv4crc",
+  "swf": "application/x-shockwave-flash",
+  "t": "application/x-troff",
+  "tar": "application/x-tar",
+  "tcl": "application/x-tcl",
+  "tex": "application/x-tex",
+  "texi": "application/x-texinfo",
+  "texinfo": "application/x-texinfo",
+  "tif": "image/tiff",
+  "tiff": "image/tiff",
+  "tr": "application/x-troff",
+  "tsv": "text/tab-separated-values",
+  "txt": "text/plain",
+  "ustar": "application/x-ustar",
+  "vcd": "application/x-cdlink",
+  "vrml": "model/vrml",
+  "wav": "audio/x-wav",
+  "wbmp": "image/vnd.wap.wbmp",
+  "wbxml": "application/vnd.wap.wbxml",
+  "wml": "text/vnd.wap.wml",
+  "wmlc": "application/vnd.wap.wmlc",
+  "wmls": "text/vnd.wap.wmlscript",
+  "wmlsc": "application/vnd.wap.wmlscriptc",
+  "wrl": "model/vrml",
+  "xbm": "image/x-xbitmap",
+  "xht": "application/xhtml+xml",
+  "xhtml": "application/xhtml+xml",
+  "xls": "application/vnd.ms-excel",
+  "xml": "text/xml",
+  "xpm": "image/x-xpixmap",
+  "xsl": "text/xml",
+  "xwd": "image/x-xwindowdump",
+  "xyz": "chemical/x-xyz",
+  "zip": "application/zip"
+}
\ No newline at end of file
diff --git a/src/Framework/ZMBuf.php b/src/Framework/ZMBuf.php
index 053c53b9..422dc533 100755
--- a/src/Framework/ZMBuf.php
+++ b/src/Framework/ZMBuf.php
@@ -99,7 +99,7 @@ class ZMBuf
     }
 
     static function config($config_name) {
-        return self::$config ?? null;
+        return self::$config[$config_name] ?? null;
     }
 
     public static function resetCache() {
diff --git a/src/Module/Example/HttpImageManager.php b/src/Module/Example/HttpImageManager.php
new file mode 100644
index 00000000..87e20450
--- /dev/null
+++ b/src/Module/Example/HttpImageManager.php
@@ -0,0 +1,35 @@
+<?php
+
+
+namespace Module\Example;
+
+use Co;
+use Framework\Console;
+use Framework\ZMBuf;
+use ZM\Annotation\Http\RequestMapping;
+use ZM\Annotation\Swoole\SwooleEventAfter;
+use ZM\ModBase;
+use ZM\Utils\DataProvider;
+
+class HttpImageManager extends ModBase
+{
+    /**
+     * @param $param
+     * @RequestMapping("/images/{file_name}")
+     */
+    public function innerImage($param) {
+        $filename = DataProvider::getResourceFolder() . "images/";
+        $param_name = $param["file_name"];
+        $param_name = strtolower($param_name);
+        if (mb_strpos($param_name, "..") !== false) {
+            $this->response->status(404);
+            $this->response->end();
+            return;
+        }
+        $exp = explode(".", $param_name);
+        if (($type = array_pop($exp))) {
+            $this->response->header("Content-Type", ZMBuf::config("file_header")[$type] ?? "text/html");
+        }
+        $this->response->end(Co::readFile($filename . $param_name));
+    }
+}