diff --git a/source/tools/monitor/unity/beaver/guide/outLine.md b/source/tools/monitor/unity/beaver/guide/outLine.md
index 22a77dcd9ed46f9fdd6cebba7f18815a4dd367f4..d1788e81a59a0ddf18f1454bf11aec293fb0b627 100644
--- a/source/tools/monitor/unity/beaver/guide/outLine.md
+++ b/source/tools/monitor/unity/beaver/guide/outLine.md
@@ -1,9 +1,11 @@
 # 外部数据写入支持
-unity-mon可以作为一个独立的TSDB 数据库进行使用，支持[行协议](https://jasper-zhang1.gitbooks.io/influxdb/content/Write_protocols/line_protocol.html)写入数据，并按需完成对外数据吐出。
+unity-mon可以作为一个独立的TSDB 数据库进行使用，支持[行协议](https://jasper-zhang1.gitbooks.io/influxdb/content/Write_protocols/line_protocol.html)写入数据，并按需完成对外数据吐出，如exporter等接口。
 
 ## 行协议格式支持情况
 unity-mon 当前除了不支持时间戳，支持行协议其它所有的数据类型，包含数值和日志。写行数据时，有以下注意事项：
 
+* 指标写入周期需要与大循环刷新周期保持一致，参考 yaml/config/freq 参数配置；
+
 * 不要将同一表名和同一索引，但数值不同的数据放在同一批次写入操作中，会发生时序数据覆盖，如；
 
 ```
@@ -18,7 +20,7 @@ talbe_a,index=table_a value1=1,value2=2
 talbe_a,index=table_b value1=3,value2=4
 ```
 
-不要出现同一张表，但是写入的索引和数值不的情况，如：
+* 不要出现同一张表，但是写入的索引和数值不的情况，如：
 
 ```
 talbe_a,index=table_a value1=1
@@ -34,7 +36,7 @@ unity-mon 同时支持管道和http post 两种方式进行写入，两者差别
 | --- | --- | --- |
 | 适用范围 | 内部 | 内部 + 外部 |
 | 写入效率 | 高 | 低 |
-| 最大写入数据长度 | 64K | 2M |
+| 最大单次写入数据长度 | 64K | 2M |
 
 使用者可以结合自己的实际情况进行推送
 
diff --git a/source/tools/monitor/unity/beaver/url_api.lua b/source/tools/monitor/unity/beaver/url_api.lua
index e54fa5c3d1b8a03b69e7a6b0237edbae0e4c5f9d..47389f6b62f50270bd5694a1fdf27054caaa33cc 100644
--- a/source/tools/monitor/unity/beaver/url_api.lua
+++ b/source/tools/monitor/unity/beaver/url_api.lua
@@ -45,11 +45,11 @@ local function reqOSS(oss, uuid, stream)
 end
 
 function CurlApi:oss(tReq)
-    local stat, tJson = pcall(self.getJson, self, tReq)
-    if stat and tJson then
-        local uuid = tJson.uuid
-        local stream = tJson.stream
-        if uuid and stream then
+    local uuid = tReq.header['uuid']
+    local cLen = tonumber(tReq.header['content-length'])
+    if uuid and cLen and cLen > 0 then
+        local stream = tReq.data
+        if stream then
             local stat, body = pcall(reqOSS, self._oss, uuid, stream)
             if stat then
                 return body
@@ -57,10 +57,10 @@ function CurlApi:oss(tReq)
                 return "bad req dns " .. body, 400
             end
         else
-            return "need uuid and stream arg.", 400
+            return "need stream arg.", 400
         end
     else
-        return "bad dns " .. tReq.data, 400
+        return "need uuid and content-length > 0." .. tReq.data, 400
     end
 end
 
diff --git a/source/tools/monitor/unity/test/curl/postOSS.lua b/source/tools/monitor/unity/test/curl/postOSS.lua
index 8d37e291ee5d97335d751b9170b9abc775b1e15c..dc1e78d1d2a7f10700a417319dd03df360239548 100644
--- a/source/tools/monitor/unity/test/curl/postOSS.lua
+++ b/source/tools/monitor/unity/test/curl/postOSS.lua
@@ -13,6 +13,10 @@ local url = "http://127.0.0.1:8400/api/oss"
 local file = io.open("test.bin", "rb")
 local content = file:read("*all")
 file:close()
-local req = {stream = content, uuid = system:guid()}
-local res = cli:postTable(url, req)
+local header = {
+    uuid = system:guid(),
+    ['Content-Type'] = 'application/octet-stream',
+    ["Content-Length"] = #content
+}
+local res = cli:post(url, content, header)
 system:dumps(res)
\ No newline at end of file
diff --git a/source/tools/monitor/unity/test/curl/postOSS.py b/source/tools/monitor/unity/test/curl/postOSS.py
index fb1f74da447f68f1ed856e3aa48e119e4adf9553..83074a31d0c86912791929d044e14b3c85881ca7 100644
--- a/source/tools/monitor/unity/test/curl/postOSS.py
+++ b/source/tools/monitor/unity/test/curl/postOSS.py
@@ -4,6 +4,8 @@ import uuid
 import json
 
 url = "http://127.0.0.1:8400/api/oss"
-d = {"stream": "hello oss", "uuid": str(uuid.uuid4())}
-res = requests.post(url, json=d)
-print(res)
+headers = {'Content-Type': 'application/octet-stream', 'uuid': str(uuid.uuid4())}
+data = b'binary data'
+
+response = requests.post(url, headers=headers, data=data)
+print(response)