diff --git a/app/modules/file.c b/app/modules/file.c
index 9edc6fd5..760877d6 100644
--- a/app/modules/file.c
+++ b/app/modules/file.c
@@ -152,9 +152,15 @@ static int ICACHE_FLASH_ATTR file_check( lua_State* L )
 
 #endif
 
-// Lua: readline()
-static int ICACHE_FLASH_ATTR file_readline( lua_State* L )
+// g_read()
+static int ICACHE_FLASH_ATTR file_g_read( lua_State* L, int n, int16_t end_char )
 {
+  if(n< 0 || n>LUAL_BUFFERSIZE) 
+    n = LUAL_BUFFERSIZE;
+  if(end_char < 0 || end_char >255)
+    end_char = EOF;
+  signed char ec = (signed char)end_char;
+
   luaL_Buffer b;
   if((FS_OPEN_OK - 1)==file_fd)
     return luaL_error(L, "open a file first");
@@ -170,7 +176,7 @@ static int ICACHE_FLASH_ATTR file_readline( lua_State* L )
       break;
     }
     p[i++] = c;
-  }while((c!=EOF) && (c!='\n') && (i<LUAL_BUFFERSIZE) );
+  }while((c!=EOF) && (c!=ec) && (i<n) );
 
 #if 0
   if(i>0 && p[i-1] == '\n')
@@ -187,6 +193,40 @@ static int ICACHE_FLASH_ATTR file_readline( lua_State* L )
   return 1;  /* read at least an `eol' */ 
 }
 
+// Lua: read()
+// file.read() will read all byte in file
+// file.read(10) will read 10 byte from file, or EOF is reached.
+// file.read('q') will read until 'q' or EOF is reached. 
+static int ICACHE_FLASH_ATTR file_read( lua_State* L )
+{
+  unsigned need_len = LUAL_BUFFERSIZE;
+  int16_t end_char = EOF;
+  size_t el;
+  if( lua_type( L, 1 ) == LUA_TNUMBER )
+  {
+    need_len = ( unsigned )luaL_checkinteger( L, 1 );
+    if( need_len > LUAL_BUFFERSIZE ){
+      need_len = LUAL_BUFFERSIZE;
+    }
+  }
+  else if(lua_isstring(L, 1))
+  {
+    const char *end = luaL_checklstring( L, 1, &el );
+    if(el!=1){
+      return luaL_error( L, "wrong arg range" );
+    }
+    end_char = (int16_t)end[0];
+  }
+
+  return file_g_read(L, need_len, end_char);
+}
+
+// Lua: readline()
+static int ICACHE_FLASH_ATTR file_readline( lua_State* L )
+{
+  return file_g_read(L, LUAL_BUFFERSIZE, '\n');
+}
+
 // Lua: write("string")
 static int ICACHE_FLASH_ATTR file_write( lua_State* L )
 {
@@ -233,6 +273,7 @@ const LUA_REG_TYPE file_map[] =
   { LSTRKEY( "close" ), LFUNCVAL( file_close ) },
   { LSTRKEY( "write" ), LFUNCVAL( file_write ) },
   { LSTRKEY( "writeline" ), LFUNCVAL( file_writeline ) },
+  { LSTRKEY( "read" ), LFUNCVAL( file_read ) },
   { LSTRKEY( "readline" ), LFUNCVAL( file_readline ) },
 #if defined(BUILD_WOFS)
   { LSTRKEY( "format" ), LFUNCVAL( file_format ) },