From dc943d45490f0c1897c503352b4233e7bfc4a247 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BC=A0=E5=BE=B7=E6=BB=A1?= <go_developer@163.com>
Date: Wed, 10 Mar 2021 18:58:21 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E7=AE=80=E7=89=88=E6=95=B0?=
 =?UTF-8?q?=E6=8D=AE=E8=BF=87=E6=BB=A4,=E6=9C=AA=E6=B5=8B=E8=AF=95?=
MIME-Version: 1.0
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---
 go.mod       |  1 +
 go.sum       |  2 ++
 safe/data.go | 37 +++++++++++++++++++++++++++++++++++++
 3 files changed, 40 insertions(+)
 create mode 100644 safe/data.go

diff --git a/go.mod b/go.mod
index c38de97..a06a6d4 100644
--- a/go.mod
+++ b/go.mod
@@ -3,6 +3,7 @@ module github.com/go-developer/gopkg
 go 1.15
 
 require (
+	github.com/buger/jsonparser v1.1.1 // indirect
 	github.com/gin-gonic/gin v1.6.3
 	github.com/go-redis/redis/v8 v8.6.0
 	github.com/lestrrat-go/file-rotatelogs v2.4.0+incompatible
diff --git a/go.sum b/go.sum
index 7822e72..1e59407 100644
--- a/go.sum
+++ b/go.sum
@@ -1,4 +1,6 @@
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/buger/jsonparser v1.1.1 h1:2PnMjfWD7wBILjqQbt530v576A/cAbQvEW9gGIpYMUs=
+github.com/buger/jsonparser v1.1.1/go.mod h1:6RYKKt7H4d4+iWqouImQ9R2FZql3VbhNgx27UK13J/0=
 github.com/cespare/xxhash/v2 v2.1.1 h1:6MnRN8NT7+YBpUIWxHtefFZOKTAPgGjpQSxqLNn0+qY=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
diff --git a/safe/data.go b/safe/data.go
new file mode 100644
index 0000000..6d167e2
--- /dev/null
+++ b/safe/data.go
@@ -0,0 +1,37 @@
+// Package safe ...
+//
+// Description : 按需返回对外暴露的字段
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 2021-03-10 6:38 下午
+package safe
+
+import (
+	"strings"
+
+	"github.com/buger/jsonparser"
+)
+
+// Filter 按需输出数据
+//
+// Author : go_developer@163.com<张德满>
+//
+// Date : 6:40 下午 2021/3/10
+func Filter(source []byte, filter []string) ([]byte, error) {
+	var (
+		bt     []byte
+		setErr error
+	)
+	for _, item := range filter {
+		fieldList := strings.Split(item, ",")
+		val, _, _, err := jsonparser.Get(source, fieldList...)
+		if nil != err {
+			return nil, err
+		}
+		if bt, setErr = jsonparser.Set(bt, val, fieldList...); nil != setErr {
+			return nil, setErr
+		}
+	}
+	return bt, nil
+}