58 lines
1.4 KiB
Go
58 lines
1.4 KiB
Go
package backend
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import (
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"crypto/tls"
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"crypto/x509"
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"fmt"
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"io/ioutil"
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"net"
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"net/http"
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"time"
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"github.com/restic/restic/internal/debug"
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)
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// Transport returns a new http.RoundTripper with default settings applied. If
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// a custom rootCertFilename is non-empty, it must point to a valid PEM file,
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// otherwise the function will return an error.
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func Transport(rootCertFilenames []string) (http.RoundTripper, error) {
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// copied from net/http
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tr := &http.Transport{
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Proxy: http.ProxyFromEnvironment,
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DialContext: (&net.Dialer{
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Timeout: 30 * time.Second,
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KeepAlive: 30 * time.Second,
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DualStack: true,
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}).DialContext,
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MaxIdleConns: 100,
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MaxIdleConnsPerHost: 100,
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IdleConnTimeout: 90 * time.Second,
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TLSHandshakeTimeout: 10 * time.Second,
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ExpectContinueTimeout: 1 * time.Second,
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}
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if rootCertFilenames == nil {
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return debug.RoundTripper(tr), nil
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}
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p := x509.NewCertPool()
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for _, filename := range rootCertFilenames {
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if filename == "" {
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return nil, fmt.Errorf("empty filename for root certificate supplied")
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}
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b, err := ioutil.ReadFile(filename)
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if err != nil {
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return nil, fmt.Errorf("unable to read root certificate: %v", err)
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}
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if ok := p.AppendCertsFromPEM(b); !ok {
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return nil, fmt.Errorf("cannot parse root certificate from %q", filename)
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}
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}
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tr.TLSClientConfig = &tls.Config{
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RootCAs: p,
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}
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// wrap in the debug round tripper
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return debug.RoundTripper(tr), nil
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}
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