71 lines
1.7 KiB
Go
71 lines
1.7 KiB
Go
package client
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import (
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"context"
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"fmt"
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"net/http"
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"strconv"
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)
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func (cli *Client) ManifestExists(ctx context.Context, rawref string) (bool, string, int64, string, error) {
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var err error
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var exist bool
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var mime string
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var size int64
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var csum string
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ref, err := NewReference(rawref)
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if err != nil {
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return exist, mime, size, csum, err
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}
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uri := ref.Manifest()
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user, pass := ref.Userinfo()
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req, err := http.NewRequestWithContext(ctx, http.MethodHead, uri, nil)
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if err != nil {
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return exist, mime, size, csum, err
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}
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req.Header.Set("User-Agent", cli.userAgent)
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req.Header.Set("Accept", "*/*")
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if cli.authenticator != nil {
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authHeader, authKey, err := cli.authenticator.MakeHeader(user, pass)
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if err != nil {
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return exist, mime, size, csum, err
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}
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req.Header.Set(authHeader, authKey)
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}
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resp, err := cli.httpClient.Do(req)
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if err != nil {
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return exist, mime, size, csum, err
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}
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defer resp.Body.Close()
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if resp.StatusCode == http.StatusNotFound {
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return exist, mime, size, csum, err
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}
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if resp.StatusCode != http.StatusOK {
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err := fmt.Errorf("Unxected response code %s", resp.Status)
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return exist, mime, size, csum, err
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}
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contentLength := resp.Header.Get("Content-Length")
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size, err = strconv.ParseInt(contentLength, 10, 64)
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if err != nil {
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return exist, mime, size, csum, err
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}
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mime = resp.Header.Get("Content-Type")
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if mime == "" {
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err := fmt.Errorf("Empty MIME type declaration")
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return exist, mime, size, csum, err
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}
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csum = resp.Header.Get("Docker-Content-Digest")
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if csum == "" {
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err := fmt.Errorf("Empty digest declaration")
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return exist, mime, size, csum, err
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}
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exist = true
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return exist, mime, size, csum, err
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}
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