64 lines
1.3 KiB
Go
64 lines
1.3 KiB
Go
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package db
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import (
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"fmt"
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"io"
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"time"
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_ "github.com/loveuer/go-sqlite3/embed"
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"github.com/loveuer/go-sqlite3/vfs/memdb"
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"github.com/loveuer/go-sqlite3/vfs/readervfs"
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"github.com/ncruces/go-sqlite3/gormlite"
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"github.com/psanford/httpreadat"
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"gorm.io/gorm"
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)
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type cfgSqlite struct {
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fsType string // file, mem(bytes), url
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memDump *memdb.MemDB
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memReader io.ReadCloser
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}
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func openSqlite(c *Client, dsn string) error {
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var (
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db gorm.Dialector
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err error
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)
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switch c.cfgSqlite.fsType {
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case "file":
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db = gormlite.Open("file:" + dsn)
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case "url":
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name := fmt.Sprintf("%d.db", time.Now().UnixNano())
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readervfs.Create(name, httpreadat.New(dsn))
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uri := fmt.Sprintf("file:%s?vfs=reader", name)
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db = gormlite.Open(uri)
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case "mem":
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var (
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bs []byte
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name = fmt.Sprintf("%d.db", time.Now().UnixNano())
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)
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if c.cfgSqlite.memReader == nil {
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bs = make([]byte, 0)
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} else {
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if bs, err = io.ReadAll(c.cfgSqlite.memReader); err != nil {
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return err
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}
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}
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memDump := memdb.Create(name, bs)
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c.cfgSqlite.memDump = memDump
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uri := fmt.Sprintf("file:/%s?vfs=memdb", name)
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db = gormlite.Open(uri)
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default:
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return fmt.Errorf("unsupported sqlite fs type: %s", c.cfgSqlite.fsType)
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}
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if c.cli, err = gorm.Open(db); err != nil {
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return err
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}
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return nil
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}
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