diff --git a/coolq/api.go b/coolq/api.go
index 160f96c5..eaea5faf 100644
--- a/coolq/api.go
+++ b/coolq/api.go
@@ -6,6 +6,7 @@ import (
 	"path"
 	"runtime"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/Mrs4s/MiraiGo/binary"
@@ -125,7 +126,7 @@ func (bot *CQBot) CQSendGroupMessage(groupId int64, i interface{}, autoEscape bo
 			if mid == -1 {
 				return Failed(100)
 			}
-			log.Infof("发送群 %v(%v)  的消息: %v (%v)", groupId, groupId, m.String(), mid)
+			log.Infof("发送群 %v(%v)  的消息: %v (%v)", groupId, groupId, limitedString(m.String()), mid)
 			return OK(MSG{"message_id": mid})
 		}
 		str = func() string {
@@ -152,7 +153,7 @@ func (bot *CQBot) CQSendGroupMessage(groupId int64, i interface{}, autoEscape bo
 	if mid == -1 {
 		return Failed(100)
 	}
-	log.Infof("发送群 %v(%v)  的消息: %v (%v)", groupId, groupId, str, mid)
+	log.Infof("发送群 %v(%v)  的消息: %v (%v)", groupId, groupId, limitedString(str), mid)
 	return OK(MSG{"message_id": mid})
 }
 
@@ -249,7 +250,7 @@ func (bot *CQBot) CQSendPrivateMessage(userId int64, i interface{}, autoEscape b
 			if mid == -1 {
 				return Failed(100)
 			}
-			log.Infof("发送好友 %v(%v)  的消息: %v (%v)", userId, userId, m.String(), mid)
+			log.Infof("发送好友 %v(%v)  的消息: %v (%v)", userId, userId, limitedString(m.String()), mid)
 			return OK(MSG{"message_id": mid})
 		}
 		str = func() string {
@@ -274,7 +275,7 @@ func (bot *CQBot) CQSendPrivateMessage(userId int64, i interface{}, autoEscape b
 	if mid == -1 {
 		return Failed(100)
 	}
-	log.Infof("发送好友 %v(%v)  的消息: %v (%v)", userId, userId, str, mid)
+	log.Infof("发送好友 %v(%v)  的消息: %v (%v)", userId, userId, limitedString(str), mid)
 	return OK(MSG{"message_id": mid})
 }
 
@@ -758,3 +759,12 @@ func convertGroupMemberInfo(groupId int64, m *client.GroupMemberInfo) MSG {
 		"card_changeable":   false,
 	}
 }
+
+func limitedString(str string) string {
+	if strings.Count(str, "") <= 10 {
+		return str
+	}
+	limited := []rune(str)
+	limited = limited[:10]
+	return string(limited) + " ..."
+}
diff --git a/docs/cqhttp.md b/docs/cqhttp.md
index 56145532..38c212ef 100644
--- a/docs/cqhttp.md
+++ b/docs/cqhttp.md
@@ -268,6 +268,28 @@ Type: `cardimage`
 | group_id | int64  | 群号 |
 | group_name     | string | 新名 |
 
+### 设置群头像
+
+终结点: `/set_group_portrait`  
+
+**参数** 
+
+| 字段     | 类型   | 说明 |
+| -------- | ------ | ---- |
+| group_id | int64  | 群号 |
+| file     | string | 图片文件名 |
+| cache |  int | 表示是否使用已缓存的文件 |
+
+[1]`file` 参数支持以下几种格式：
+
+- 绝对路径，例如 `file:///C:\\Users\Richard\Pictures\1.png`，格式使用 [`file` URI](https://tools.ietf.org/html/rfc8089)
+- 网络 URL，例如 `http://i1.piimg.com/567571/fdd6e7b6d93f1ef0.jpg`
+- Base64 编码，例如 `base64://iVBORw0KGgoAAAANSUhEUgAAABQAAAAVCAIAAADJt1n/AAAAKElEQVQ4EWPk5+RmIBcwkasRpG9UM4mhNxpgowFGMARGEwnBIEJVAAAdBgBNAZf+QAAAAABJRU5ErkJggg==`
+
+[2]`cache`参数: 通过网络 URL 发送时有效，`1`表示使用缓存，`0`关闭关闭缓存，默认 为`1`
+
+[3] 目前这个API在登录一段时间后因cookie失效而失效，请考虑后使用
+
 ### 获取图片信息
 
 终结点: `/get_image`  
diff --git a/global/fs.go b/global/fs.go
index 9aa164dc..4939952a 100644
--- a/global/fs.go
+++ b/global/fs.go
@@ -53,7 +53,7 @@ func IsAMRorSILK(b []byte) bool {
 }
 
 func FindFile(f, cache, PATH string) (data []byte, err error) {
-	data, err = nil, errors.New("can't find the file: "+f)
+	data, err = nil, errors.New("syntax error")
 	if strings.HasPrefix(f, "http") || strings.HasPrefix(f, "https") {
 		if cache == "" {
 			cache = "1"
@@ -74,7 +74,8 @@ func FindFile(f, cache, PATH string) (data []byte, err error) {
 			return nil, err
 		}
 	} else if strings.HasPrefix(f, "file") {
-		fu, err := url.Parse(f)
+		var fu *url.URL
+		fu, err = url.Parse(f)
 		if err != nil {
 			return nil, err
 		}
diff --git a/go.mod b/go.mod
index 27e1a341..c353b67a 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/Mrs4s/go-cqhttp
 go 1.14
 
 require (
-	github.com/Mrs4s/MiraiGo v0.0.0-20200926101830-afb0ed6368ad
+	github.com/Mrs4s/MiraiGo v0.0.0-20200929101232-fbb53eba9b5a
 	github.com/fastly/go-utils v0.0.0-20180712184237-d95a45783239 // indirect
 	github.com/gin-gonic/gin v1.6.3
 	github.com/go-playground/validator/v10 v10.3.0 // indirect
diff --git a/go.sum b/go.sum
index 1fc7551d..7b78a601 100644
--- a/go.sum
+++ b/go.sum
@@ -1,9 +1,9 @@
 cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/Mrs4s/MiraiGo v0.0.0-20200921142226-9a449519db5c h1:TpGiSjI8Pe0YLEQPAVkOV37OFLeJnQ6jxvcDSb/LESY=
-github.com/Mrs4s/MiraiGo v0.0.0-20200921142226-9a449519db5c/go.mod h1:cwYPI2uq6nxNbx0nA6YuAKF1V5szSs6FPlGVLQvRUlo=
-github.com/Mrs4s/MiraiGo v0.0.0-20200926101830-afb0ed6368ad h1:m4KU2n3desxr1L3Idk7qRlf71+77rm0JEMWqd4gmrlQ=
-github.com/Mrs4s/MiraiGo v0.0.0-20200926101830-afb0ed6368ad/go.mod h1:cwYPI2uq6nxNbx0nA6YuAKF1V5szSs6FPlGVLQvRUlo=
+github.com/Mrs4s/MiraiGo v0.0.0-20200928082341-65c1709f5eec h1:lzFAr6b1yO6JIzfse0VIsPq71E0KfdsoS3VnyOLurS4=
+github.com/Mrs4s/MiraiGo v0.0.0-20200928082341-65c1709f5eec/go.mod h1:cwYPI2uq6nxNbx0nA6YuAKF1V5szSs6FPlGVLQvRUlo=
+github.com/Mrs4s/MiraiGo v0.0.0-20200929101232-fbb53eba9b5a h1:MaKFlcVI0aW7PFMrxpv2UBmvMGqKsiQP3O9j5wtVYYg=
+github.com/Mrs4s/MiraiGo v0.0.0-20200929101232-fbb53eba9b5a/go.mod h1:cwYPI2uq6nxNbx0nA6YuAKF1V5szSs6FPlGVLQvRUlo=
 github.com/bwmarrin/snowflake v0.3.0 h1:xm67bEhkKh6ij1790JB83OujPR5CzNe8QuQqAgISZN0=
 github.com/bwmarrin/snowflake v0.3.0/go.mod h1:NdZxfVWX+oR6y2K0o6qAYv6gIOP9rjG0/E9WsDpxqwE=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
@@ -58,7 +58,6 @@ github.com/json-iterator/go v1.1.7/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/u
 github.com/json-iterator/go v1.1.9/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/json-iterator/go v1.1.10/go.mod h1:KdQUCv79m/52Kvf8AW2vK1V8akMuk1QjK/uOdHXbAo4=
 github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
-github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
 github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
 github.com/leodido/go-urn v1.1.0/go.mod h1:+cyI34gQWZcE1eQU7NVgKkkzdXDQHr1dBMtdAPozLkw=
 github.com/leodido/go-urn v1.2.0 h1:hpXL4XnriNwQ/ABnpepYM/1vCLWNDfUNts8dX3xTG6Y=
@@ -140,8 +139,6 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20190813064441-fde4db37ae7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-golang.org/x/sys v0.0.0-20200909081042-eff7692f9009 h1:W0lCpv29Hv0UaM1LXb9QlBHLNP8UFfcKjblhVCWftOM=
-golang.org/x/sys v0.0.0-20200909081042-eff7692f9009/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200916084744-dbad9cb7cb7a h1:chkwkn8HYWVtTE5DCQNKYlkyptadXYY0+PuyaVdyMo4=
 golang.org/x/sys v0.0.0-20200916084744-dbad9cb7cb7a/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=