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modules/MysqlQuery.go

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+package modules
+
+import (
+	"database/sql"
+	"log"
+)
+
+type IpInformation struct {
+	Ip             string `json:"ip"`
+	CountryIsoCode string `json:"Country_Iso_Code"`
+	CountryName    string `json:"Country_Name"`
+	City           string `json:"City"`
+	TimeZone       string `json:"Time_Zone"`
+}
+
+func MysqlQuery(ip string) IpInformation {
+	// 连接到MySQL数据库
+	db, err := sql.Open("mysql", "root:990821@tcp(192.168.2.20:3306)/checkip")
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	// 执行查询语句
+	query := `
+		SELECT country_iso_code, country_name, city_name,time_zone
+		FROM (
+			SELECT *
+			FROM geolite2_city_ipv4_string
+			WHERE ? between network_start_ip and network_last_ip
+			LIMIT 1
+		) net
+		LEFT JOIN geolite2_city_locations_en ON net.geoname_id = geolite2_city_locations_en.geoname_id;
+	`
+	rows, err := db.Query(query, ip)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer rows.Close()
+	var IpInformatin IpInformation
+	// 处理查询结果
+	for rows.Next() {
+		var (
+			country_iso_code string
+			country_name     string
+			city_name        string
+			time_zone        string
+		)
+		err := rows.Scan(&country_iso_code, &country_name, &city_name, &time_zone)
+		if err != nil {
+			log.Fatal(err)
+		}
+		IpInformatin = IpInformation{
+			Ip:             ip,
+			CountryIsoCode: country_iso_code,
+			CountryName:    country_name,
+			City:           city_name,
+			TimeZone:       time_zone,
+		}
+		// 打印结果
+		//fmt.Println("country_iso_code=", country_iso_code)
+		//fmt.Println("country_name=", country_name)
+		//fmt.Println("city_name=", city_name)
+		//fmt.Println("time_zone=", time_zone)
+	}
+	// 检查是否有错误发生
+	err = rows.Err()
+	if err != nil {
+		log.Fatal(err)
+	}
+	log.Print("tag:mysqlquery=", IpInformatin)
+	return IpInformatin
+}