Go进阶

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{
    "extras":{
        "template_id":"2nuGz1AciMcJp9GyAmsebWB7EAlqTbhr6Wp2d7QXZ2A",
        "url":"",
        "data":{
            "first":{
                "value":"asd465465",
                "color":"#17317"
            },
            "keyword1":{
                "value":"$(Member.ID)",
                "color":"#17317"
            },
            "keyword2":{
                "value":"asdad"
            },
            "remark":{
                "value":"$(Member.Nick)",
                "color":"#17317"
            }
        }
    }
}

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// map[string]interface{}        map[string]map[string]map[string]string
// 正常
extras = map[string]interface{}
for key, val := range Extras {
			if key == handler_push.TPL_KEY_DATA {
				for keyWord, valMap := range val.(map[string]interface{}) {
					// fmt.Printf("%v, %v\n", keyWord, valMap)
					v := valMap.(map[string]interface{})
					// fmt.Printf("%v, %v\n", keyWord, v)
                    vStr := v[handler_push.TPL_DATA_VALUE].(string)
                    colorStr := v[handler_push.TPL_DATA_COLOR].(string)
				}
			}
		}

// 错误
extras = map[string]interface{}
for key, val := range Extras {
			if key == handler_push.TPL_KEY_DATA {
				for keyWord, valMap := range val.(map[string]map[string]string) {
					// fmt.Printf("%v, %v\n", keyWord, valMap)
                    vStr := valMap[handler_push.TPL_DATA_VALUE].(string)
                    colorStr := valMap[handler_push.TPL_DATA_COLOR].(string)
		}
	}
}

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if val, ok := Extras[TPL_KEY_DATA]; ok {
		for _, data := range val.([]map[string]string) {
			tdv := &WxPushTemplateDataValue{}
			tdv.Value = data[TPL_DATA_VALUE]
			if color, ok := data[TPL_DATA_COLOR]; ok {
				tdv.Color = color
			}
			mp[data[TPL_DATA_KEY]] = tdv
		}
	}
//interface conversion: interface {} is []interface {}, not []map[string]string

// 两次访问会出错
	if datas, ok := Extras[TPL_KEY_DATA]; ok {
			fmt.Printf("ssss %v", datas)
			for _, data := range datas.([]interface{}) {
				_data := data.(map[string]interface{})
				d := make(map[string]string, 0)
				d[TPL_DATA_KEY] = _data[TPL_DATA_KEY].(string)
				d[TPL_DATA_VALUE] = replaceParam(member, _data[TPL_DATA_VALUE].(string))
				if color, ok := _data[TPL_DATA_COLOR]; ok {
					d[TPL_DATA_COLOR] = color.(string)
				}
			}
		}
//interface {} is []map[string]string, not []interface {}

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// 仅仅传递了指针，容易出现问题
map1 = map2
// 真正的值复制
for key, val := range map2 {
    map1[key] = val
}