diff --git a/HISTORY b/HISTORY
index 2dbf9b0..16865bc 100644
--- a/HISTORY
+++ b/HISTORY
@@ -1,9 +1,10 @@
 
-Version 1.31  2016-11-13
+Version 1.31  2016-11-24
   * move SET_SOCKOPT_NOSIGPIPE from sockopt.c to sockopt.h
   * add function get_time_item_from_str
   * add file trylock functions
   * logger context add field: use_file_write_lock
+  * log support replace space chars
 
 Version 1.30  2016-10-31
   * modify php-fastcommon/test.php
diff --git a/src/logger.c b/src/logger.c
index 5c9e2b8..bc76acb 100644
--- a/src/logger.c
+++ b/src/logger.c
@@ -249,6 +249,55 @@ void log_set_use_file_write_lock_ex(LogContext *pContext, const bool use_lock)
 	pContext->use_file_write_lock = use_lock;
 }
 
+int log_set_space_char_pairs_ex(LogContext *pContext,
+        LogSpaceCharPairArray *pSpaceCharPairs)
+{
+    int i;
+    unsigned char src;
+    if (pSpaceCharPairs->count > LOG_MAX_SPACE_CHAR_PAIRS)
+    {
+		fprintf(stderr, "file: "__FILE__", line: %d, "
+                "count: %d is too large, exceeds %d!\n", __LINE__,
+                pSpaceCharPairs->count, LOG_MAX_SPACE_CHAR_PAIRS);
+        return EINVAL;
+    }
+
+    if (pContext->space_char_count > 0)
+    {
+        memset(pContext->space_char_table, 0, sizeof(pContext->space_char_table));
+    }
+
+    pContext->space_char_count = pSpaceCharPairs->count;
+    for (i=0; i<pSpaceCharPairs->count; i++)
+    {
+        src = pSpaceCharPairs->pairs[i].src;
+        pContext->space_char_table[src] = pSpaceCharPairs->pairs[i].dest;
+    }
+    return 0;
+}
+
+void log_set_standard_space_chars_ex(LogContext *pContext,
+        const unsigned char dest_base)
+{
+    int i;
+    LogSpaceCharPairArray pair_array;
+
+    pair_array.count = 7;
+    pair_array.pairs[0].src = '\0';
+    pair_array.pairs[1].src = '\t';
+    pair_array.pairs[2].src = '\n';
+    pair_array.pairs[3].src = '\v';
+    pair_array.pairs[4].src = '\f';
+    pair_array.pairs[5].src = '\r';
+    pair_array.pairs[6].src = ' ';
+
+    for (i=0; i<pair_array.count; i++) {
+        pair_array.pairs[i].dest = dest_base + i;
+    }
+
+    log_set_space_char_pairs_ex(pContext, &pair_array);
+}
+
 void log_set_time_precision(LogContext *pContext, const int time_precision)
 {
 	pContext->time_precision = time_precision;
@@ -1004,8 +1053,29 @@ static void doLogEx(LogContext *pContext, struct timeval *tv, \
 		buff_len = sprintf(pContext->pcurrent_buff, "%s - ", caption);
 		pContext->pcurrent_buff += buff_len;
 	}
-	memcpy(pContext->pcurrent_buff, text, text_len);
-	pContext->pcurrent_buff += text_len;
+
+    if (pContext->space_char_count > 0)
+    {
+        const unsigned char *p;
+        const unsigned char *end;
+        end = (const unsigned char *)text + text_len;
+        for (p=(const unsigned char *)text; p<end; p++)
+        {
+            if (pContext->space_char_table[*p] != 0)
+            {
+                *pContext->pcurrent_buff++ = pContext->space_char_table[*p];
+            }
+            else
+            {
+                *pContext->pcurrent_buff++ = *p;
+            }
+        }
+    }
+    else
+    {
+        memcpy(pContext->pcurrent_buff, text, text_len);
+        pContext->pcurrent_buff += text_len;
+    }
 	*pContext->pcurrent_buff++ = '\n';
 
 	if (!pContext->log_to_cache || bNeedSync)
diff --git a/src/logger.h b/src/logger.h
index de6d97f..2e168b8 100644
--- a/src/logger.h
+++ b/src/logger.h
@@ -28,11 +28,25 @@ extern "C" {
 #define LOG_COMPRESS_FLAGS_ENABLED    1
 #define LOG_COMPRESS_FLAGS_NEW_THREAD 2
 
+#define LOG_MAX_SPACE_CHAR_PAIRS      16
+
 struct log_context;
 
 //log header line callback
 typedef void (*LogHeaderCallback)(struct log_context *pContext);
 
+typedef struct log_space_char_pair
+{
+    unsigned char src;
+    unsigned char dest;
+} LogSpaceCharPair;
+
+typedef struct log_space_char_pair_array
+{
+    int count;
+    LogSpaceCharPair pairs[LOG_MAX_SPACE_CHAR_PAIRS];
+} LogSpaceCharPairArray;
+
 typedef struct log_context
 {
 	/* log level value please see: sys/syslog.h
@@ -105,6 +119,16 @@ typedef struct log_context
      * compress the log files before N days
      * */
     int compress_log_days_before;
+
+    /*
+     * space char pairs count
+     * */
+    int  space_char_count;
+
+    /*
+     * space char table to replace
+     * */
+    unsigned char space_char_table[256];
 } LogContext;
 
 extern LogContext g_log_context;
@@ -140,6 +164,12 @@ int log_init2();
 #define log_set_use_file_write_lock(use_lock)  \
     log_set_use_file_write_lock_ex(&g_log_context, use_lock)
 
+#define log_set_space_char_pairs(pSpaceCharPairs) \
+        log_set_space_char_pairs_ex(&g_log_context, pSpaceCharPairs)
+
+#define log_set_standard_space_chars(dest_base) \
+        log_set_standard_space_chars_ex(&g_log_context, dest_base)
+
 #define log_header(pContext, header, header_len) \
     log_it_ex2(pContext, NULL, header, header_len, false, false)
 
@@ -194,6 +224,26 @@ void log_set_cache_ex(LogContext *pContext, const bool bLogCache);
 */
 void log_set_use_file_write_lock_ex(LogContext *pContext, const bool use_lock);
 
+
+/** set space char pairs to replace
+ *  parameters:
+ *           pContext: the log context
+ *           pSpaceCharPairs: the space char pairs
+ *  return: 0 for success, != 0 fail
+*/
+int log_set_space_char_pairs_ex(LogContext *pContext,
+        LogSpaceCharPairArray *pSpaceCharPairs);
+
+
+/** set standard space chars to replace
+ *  parameters:
+ *           pContext: the log context
+ *           dest_base: the dest base char
+ *  return: 0 for success, != 0 fail
+*/
+void log_set_standard_space_chars_ex(LogContext *pContext,
+        const unsigned char dest_base);
+
 /** set time precision
  *  parameters:
  *           pContext: the log context