mirror of https://github.com/restic/restic.git
94 lines
1.9 KiB
Go
94 lines
1.9 KiB
Go
package b2
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import (
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"path"
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"regexp"
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"strings"
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"restic/errors"
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"restic/options"
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)
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// Config contains all configuration necessary to connect to an b2 compatible
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// server.
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type Config struct {
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AccountID string
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Key string
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Bucket string
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Prefix string
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Connections uint `option:"connections" help:"set a limit for the number of concurrent connections (default: 5)"`
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}
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// NewConfig returns a new config with default options applied.
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func NewConfig() Config {
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return Config{
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Connections: 5,
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}
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}
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func init() {
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options.Register("b2", Config{})
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}
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var bucketName = regexp.MustCompile("^[a-zA-Z0-9-]+$")
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// checkBucketName tests the bucket name against the rules at
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// https://help.backblaze.com/hc/en-us/articles/217666908-What-you-need-to-know-about-B2-Bucket-names
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func checkBucketName(name string) error {
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if name == "" {
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return errors.New("bucket name is empty")
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}
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if len(name) < 6 {
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return errors.New("bucket name is too short")
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}
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if len(name) > 50 {
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return errors.New("bucket name is too long")
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}
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if !bucketName.MatchString(name) {
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return errors.New("bucket name contains invalid characters, allowed are: a-z, 0-9, dash (-)")
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}
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return nil
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}
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// ParseConfig parses the string s and extracts the b2 config. The supported
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// configuration format is b2:bucketname/prefix. If no prefix is given the
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// prefix "restic" will be used.
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func ParseConfig(s string) (interface{}, error) {
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if !strings.HasPrefix(s, "b2:") {
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return nil, errors.New("invalid format, want: b2:bucket-name[:path]")
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}
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s = s[3:]
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data := strings.SplitN(s, ":", 2)
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if len(data) == 0 || len(data[0]) == 0 {
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return nil, errors.New("bucket name not found")
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}
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cfg := NewConfig()
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cfg.Bucket = data[0]
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if err := checkBucketName(cfg.Bucket); err != nil {
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return nil, err
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}
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if len(data) == 2 {
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p := data[1]
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if len(p) > 0 {
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p = path.Clean(p)
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}
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if len(p) > 0 && path.IsAbs(p) {
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p = p[1:]
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}
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cfg.Prefix = p
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}
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return cfg, nil
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}
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