diff --git a/HISTORY b/HISTORY
index 3636ba5..30c2ea7 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,5 +1,5 @@
 
-Version 1.40  2018-10-26
+Version 1.40  2018-10-29
   * add function conn_pool_parse_server_info and conn_pool_load_server_info
   * support directive: #@add_annotation, for example:
     #@add_annotation CONFIG_GET /usr/lib/libshmcache.so /etc/libshmcache.conf
@@ -9,6 +9,7 @@ Version 1.40  2018-10-26
   * add function fc_memmem
   * add function format_http_date
   * add function hash_find1 and hash_find2
+  * add function resolve_path and fast_buffer_append_file
 
 Version 1.39  2018-07-31
   * add #@function REPLACE_VARS
diff --git a/src/fast_buffer.c b/src/fast_buffer.c
index 24955a1..3b5ce22 100644
--- a/src/fast_buffer.c
+++ b/src/fast_buffer.c
@@ -5,7 +5,9 @@
 #include <unistd.h>
 #include <inttypes.h>
 #include <errno.h>
+#include <sys/stat.h>
 #include "logger.h"
+#include "shared_func.h"
 #include "fast_buffer.h"
 
 int fast_buffer_init_ex(FastBuffer *buffer, const int init_capacity)
@@ -155,3 +157,46 @@ int fast_buffer_append_int64(FastBuffer *buffer, const int64_t n)
     return 0;
 }
 
+int fast_buffer_append_file(FastBuffer *buffer, const char *filename)
+{
+    struct stat st;
+    int result;
+    int64_t file_size;
+
+    if (stat(filename, &st) != 0) {
+        result = errno != 0 ? errno : ENOENT;
+        if (result == ENOENT) {
+            logError("file: "__FILE__", line: %d, "
+                    "file %s not exist!", __LINE__,
+                    filename);
+        } else {
+            logError("file: "__FILE__", line: %d, "
+                    "stat file %s fail, "
+                    "result: %d, error info: %s", __LINE__,
+                    filename, result, strerror(result));
+        }
+
+        return result;
+    }
+
+    if (!S_ISREG(st.st_mode)) {
+        logError("file: "__FILE__", line: %d, "
+                "file %s is NOT a regular file!",
+                __LINE__, filename);
+        return EINVAL;
+    }
+
+    file_size = st.st_size + 1;
+    if ((result=fast_buffer_check(buffer, file_size)) != 0) {
+        return result;
+    }
+
+    if ((result=getFileContentEx(filename, buffer->data + buffer->length,
+                    0, &file_size)) != 0)
+    {
+        return result;
+    }
+
+    buffer->length += file_size;
+    return 0;
+}
diff --git a/src/fast_buffer.h b/src/fast_buffer.h
index 38f462a..da873f7 100644
--- a/src/fast_buffer.h
+++ b/src/fast_buffer.h
@@ -51,6 +51,8 @@ int fast_buffer_append_int(FastBuffer *buffer, const int n);
 
 int fast_buffer_append_int64(FastBuffer *buffer, const int64_t n);
 
+int fast_buffer_append_file(FastBuffer *buffer, const char *filename);
+
 static inline int fast_buffer_append_string(FastBuffer *buffer, const char *str)
 {
     return fast_buffer_append_buff(buffer, str, strlen(str));
diff --git a/src/logger.h b/src/logger.h
index 2ed41db..9f091b9 100644
--- a/src/logger.h
+++ b/src/logger.h
@@ -119,7 +119,7 @@ int log_init();
  *  do nothing when already inited
  *  return: 0 for success, != 0 fail
 */
-static int log_try_init()
+static inline int log_try_init()
 {
     if (g_log_context.log_buff != NULL)
     {
diff --git a/src/shared_func.c b/src/shared_func.c
index 009ad79..43517c7 100644
--- a/src/shared_func.c
+++ b/src/shared_func.c
@@ -2821,3 +2821,27 @@ char *format_http_date(time_t t, BufferInfo *buffer)
             "%a, %d %b %Y %H:%M:%S GMT", &tm_info);
     return buffer->buff;
 }
+
+char *resolve_path(const char *from, const char *filename,
+        char *full_filename, const int size)
+{
+    const char *last;
+    int len;
+
+    if (*filename == '/') {
+        snprintf(full_filename, size, "%s", filename);
+        return full_filename;
+    }
+
+    last = strrchr(from, '/');
+    if (last != NULL) {
+        len = last - from;
+        snprintf(full_filename, size, "%.*s/%s", len, from, filename);
+    } else {
+		logWarning("file: "__FILE__", line: %d, "
+                "no \"/\" in the from filename: %s",
+                __LINE__, from);
+        snprintf(full_filename, size, "%s", filename);
+    }
+    return full_filename;
+}
diff --git a/src/shared_func.h b/src/shared_func.h
index f8029a4..8a00bb1 100644
--- a/src/shared_func.h
+++ b/src/shared_func.h
@@ -840,6 +840,17 @@ const char *fc_memmem(const string_t *str, const string_t *needle);
 */
 char *format_http_date(time_t t, BufferInfo *buffer);
 
+/** return full path for the filename (the second parameter)
+ *  parameters:
+ *  	from: the input full path filename to get base path
+ *      filename: the filename to resolve path
+ *      full_filename: store the resolved full path filename
+ *      size: the max size of full_filename
+ *  return: the resolved full path filename
+*/
+char *resolve_path(const char *from, const char *filename,
+        char *full_filename, const int size);
+
 #ifdef __cplusplus
 }
 #endif