mysql

bin/main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"database/sql"
 	"image"
 	"log"
 	"net/http"
@@ -12,13 +13,60 @@ import (
 
 	"github.com/chai2010/webp"
 	"github.com/disintegration/imaging"
+	_ "github.com/go-sql-driver/mysql"
 	giftowebp "github.com/sizeofint/gif-to-webp"
+	"github.com/spf13/viper"
 )
 
+func init() {
+	// 设置日志格式
+	log.SetFlags(log.Ldate | log.Ltime | log.Lshortfile)
+}
+
 // 实现一个 web api 服务(获取指定尺寸的图片)
 func main() {
 	runtime.GOMAXPROCS(runtime.NumCPU())
 
+	// 读取配置文件yaml
+	viper.SetConfigName("config") // 设置配置文件的名字
+	viper.SetConfigType("yaml")   // 设置配置文件的格式
+	viper.AddConfigPath("./data") // 设置配置文件所在的路径
+	if err := viper.ReadInConfig(); err != nil {
+		log.Println("读取配置文件失败", err)
+		return
+	}
+	user := viper.Get("mysql.user").(string)
+	password := viper.Get("mysql.password").(string)
+	host := viper.Get("mysql.host").(string)
+	port := viper.Get("mysql.port").(int)
+	database := viper.Get("mysql.database").(string)
+	sqlconf := user + ":" + password + "@tcp(" + host + ":" + strconv.Itoa(port) + ")/" + database + "?charset=utf8mb4&parseTime=True&loc=Local"
+
+	// 连接数据库
+	db, err := sql.Open("mysql", sqlconf)
+	if err != nil {
+		log.Println("连接数据库失败", err)
+		return
+	}
+
+	// 从 web_images 表读取图片 id, version, width, height, format
+	rows, err := db.Query("SELECT id, width, height, content FROM web_images WHERE id = 8888")
+	if err != nil {
+		log.Println("查询数据库失败", err)
+		return
+	}
+	defer rows.Close()
+
+	// 遍历查询结果
+	for rows.Next() {
+		var id, width, height, content string
+		if err = rows.Scan(&id, &width, &height, &content); err != nil {
+			log.Println("读取数据库失败", err)
+			return
+		}
+		log.Println(id, width, height, content)
+	}
+
 	http.HandleFunc("/img/", func(w http.ResponseWriter, r *http.Request) {
 
 		// URL 格式: /img/{id}-{version}@{倍图}{宽度}.{格式}