mirror of https://github.com/octoleo/restic.git
74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
package s3
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import (
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"net/url"
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"path"
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"strings"
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"restic/errors"
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)
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// Config contains all configuration necessary to connect to an s3 compatible
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// server.
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type Config struct {
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Endpoint string
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UseHTTP bool
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KeyID, Secret string
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Bucket string
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Prefix string
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}
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const defaultPrefix = "restic"
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// ParseConfig parses the string s and extracts the s3 config. The two
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// supported configuration formats are s3://host/bucketname/prefix and
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// s3:host:bucketname/prefix. The host can also be a valid s3 region
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// name. If no prefix is given the prefix "restic" will be used.
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func ParseConfig(s string) (interface{}, error) {
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switch {
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case strings.HasPrefix(s, "s3:http"):
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// assume that a URL has been specified, parse it and
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// use the host as the endpoint and the path as the
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// bucket name and prefix
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url, err := url.Parse(s[3:])
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if err != nil {
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return nil, errors.Wrap(err, "url.Parse")
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}
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if url.Path == "" {
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return nil, errors.New("s3: bucket name not found")
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}
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path := strings.SplitN(url.Path[1:], "/", 2)
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return createConfig(url.Host, path, url.Scheme == "http")
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case strings.HasPrefix(s, "s3://"):
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s = s[5:]
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case strings.HasPrefix(s, "s3:"):
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s = s[3:]
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default:
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return nil, errors.New("s3: invalid format")
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}
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// use the first entry of the path as the endpoint and the
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// remainder as bucket name and prefix
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path := strings.SplitN(s, "/", 3)
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return createConfig(path[0], path[1:], false)
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}
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func createConfig(endpoint string, p []string, useHTTP bool) (interface{}, error) {
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var prefix string
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switch {
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case len(p) < 1:
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return nil, errors.New("s3: invalid format, host/region or bucket name not found")
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case len(p) == 1 || p[1] == "":
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prefix = defaultPrefix
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default:
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prefix = path.Clean(p[1])
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}
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return Config{
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Endpoint: endpoint,
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UseHTTP: useHTTP,
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Bucket: p[0],
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Prefix: prefix,
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}, nil
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}
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