110 lines
2.6 KiB
Go
110 lines
2.6 KiB
Go
package mongo
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import (
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"context"
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"errors"
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"os"
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"strings"
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"time"
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"go.mongodb.org/mongo-driver/mongo"
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"go.mongodb.org/mongo-driver/mongo/options"
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"go.mongodb.org/mongo-driver/mongo/readpref"
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)
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var (
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mongo_uri string
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mongo_database string
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mongo_username string
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mongo_password string
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)
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func init() {
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mongo_uri = os.Getenv("MONGO_URI")
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if mongo_uri == "" {
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mongo_uri = "mongodb://localhost:27017"
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}
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mongo_database = os.Getenv("MONGO_DB")
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if mongo_database == "" {
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mongo_database = "admin"
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}
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mongo_username = os.Getenv("MONGO_USERNAME")
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mongo_password = os.Getenv("MONGO_PASSWORD")
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}
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// 新连接获取
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func newConnect() (*mongo.Client, error) {
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clientOpts := options.Client().ApplyURI(mongo_uri).SetConnectTimeout(3 * time.Second)
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if mongo_username != "" && mongo_password != "" {
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clientOpts = clientOpts.SetAuth(options.Credential{
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AuthMechanism: "SCRAM-SHA-256",
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AuthSource: "admin",
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Username: mongo_username,
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Password: mongo_password,
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})
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}
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ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
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defer cancel()
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return mongo.Connect(ctx, clientOpts)
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}
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func newDB(client *mongo.Client, dbname string) (*mongo.Database, error) {
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db := dbname
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if db == "" {
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db = mongo_database
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}
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return client.Database(db), nil
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}
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func newCollection(client *mongo.Client, dbname, colname string) (*mongo.Collection, error) {
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db, err := newDB(client, dbname)
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if err != nil {
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return nil, err
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}
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return db.Collection(colname), nil
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}
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// 获取默认集合，即数据库名已指定的库
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func newDefaultCollection(client *mongo.Client, colname string) (*mongo.Collection, error) {
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db, err := newDB(client, "")
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if err != nil {
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return nil, err
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}
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return db.Collection(colname), nil
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}
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func ping() error {
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client, err := newConnect()
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if err != nil {
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return err
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}
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ctx, cancel := context.WithTimeout(context.Background(), 3*time.Second)
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defer cancel()
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defer client.Disconnect(ctx)
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return client.Ping(ctx, readpref.Primary())
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}
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// Collection 获取集合
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func Collection(client *mongo.Client, cname string) (*mongo.Collection, error) {
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collection := client.Database(mongo_database).Collection(cname)
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return collection, nil
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}
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// CollectionMulti 支持多数据库直接获取collection
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func CollectionMulti(client *mongo.Client, cname string) (*mongo.Collection, error) {
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name := strings.Split(cname, ".")
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if len(name) != 2 {
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return nil, errors.New("collection名称不正确，请使用[database.collection]方式使用")
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}
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if name[0] == "" || name[1] == "" {
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return nil, errors.New("名称不能为空")
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}
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collection := client.Database(name[0]).Collection(name[1])
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return collection, nil
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}
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