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40 lines
750 B
40 lines
750 B
package wechatpayapiv2
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import (
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"bytes"
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"fmt"
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"github.com/dtapps/go-library/utils/gomd5"
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"sort"
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"strings"
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)
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// GetSign 获取签名
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func GetSign(param map[string]interface{}, key string) string {
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sortString := getSortString(param)
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sign := gomd5.Md5(sortString + "&key=" + key)
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return strings.ToUpper(sign)
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}
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// 支付字符串拼接
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func getSortString(m map[string]interface{}) string {
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var buf bytes.Buffer
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keys := make([]string, 0, len(m))
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for k := range m {
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keys = append(keys, k)
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}
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sort.Strings(keys)
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for _, k := range keys {
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vs := m[k]
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if vs == "" {
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continue
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}
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if buf.Len() > 0 {
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buf.WriteByte('&')
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}
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buf.WriteString(k)
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buf.WriteByte('=')
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buf.WriteString(fmt.Sprintf("%v", vs))
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}
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return buf.String()
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}
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