62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
package getter
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import (
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"fmt"
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"net/url"
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"strings"
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)
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// S3Detector implements Detector to detect S3 URLs and turn
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// them into URLs that the S3 getter can understand.
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type S3Detector struct{}
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func (d *S3Detector) Detect(src, _ string) (string, bool, error) {
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if len(src) == 0 {
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return "", false, nil
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}
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if strings.Contains(src, ".amazonaws.com/") {
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return d.detectHTTP(src)
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}
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return "", false, nil
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}
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func (d *S3Detector) detectHTTP(src string) (string, bool, error) {
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parts := strings.Split(src, "/")
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if len(parts) < 2 {
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return "", false, fmt.Errorf(
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"URL is not a valid S3 URL")
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}
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hostParts := strings.Split(parts[0], ".")
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if len(hostParts) == 3 {
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return d.detectPathStyle(hostParts[0], parts[1:])
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} else if len(hostParts) == 4 {
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return d.detectVhostStyle(hostParts[1], hostParts[0], parts[1:])
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} else {
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return "", false, fmt.Errorf(
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"URL is not a valid S3 URL")
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}
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}
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func (d *S3Detector) detectPathStyle(region string, parts []string) (string, bool, error) {
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urlStr := fmt.Sprintf("https://%s.amazonaws.com/%s", region, strings.Join(parts, "/"))
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url, err := url.Parse(urlStr)
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if err != nil {
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return "", false, fmt.Errorf("error parsing S3 URL: %s", err)
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}
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return "s3::" + url.String(), true, nil
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}
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func (d *S3Detector) detectVhostStyle(region, bucket string, parts []string) (string, bool, error) {
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urlStr := fmt.Sprintf("https://%s.amazonaws.com/%s/%s", region, bucket, strings.Join(parts, "/"))
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url, err := url.Parse(urlStr)
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if err != nil {
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return "", false, fmt.Errorf("error parsing S3 URL: %s", err)
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}
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return "s3::" + url.String(), true, nil
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}
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