github.com/containerd/nerdctl/v2@v2.0.0-beta.5.0.20240520001846-b5758f54fa28/pkg/errutil/errors_check.go (about)

     1  /*
     2     Copyright The containerd Authors.
     3  
     4     Licensed under the Apache License, Version 2.0 (the "License");
     5     you may not use this file except in compliance with the License.
     6     You may obtain a copy of the License at
     7  
     8         http://www.apache.org/licenses/LICENSE-2.0
     9  
    10     Unless required by applicable law or agreed to in writing, software
    11     distributed under the License is distributed on an "AS IS" BASIS,
    12     WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13     See the License for the specific language governing permissions and
    14     limitations under the License.
    15  */
    16  
    17  package errutil
    18  
    19  import "strings"
    20  
    21  // IsErrHTTPResponseToHTTPSClient returns whether err is
    22  // "http: server gave HTTP response to HTTPS client"
    23  func IsErrHTTPResponseToHTTPSClient(err error) bool {
    24  	// The error string is unexposed as of Go 1.16, so we can't use `errors.Is`.
    25  	// https://github.com/golang/go/issues/44855
    26  	const unexposed = "server gave HTTP response to HTTPS client"
    27  	return strings.Contains(err.Error(), unexposed)
    28  }
    29  
    30  // IsErrConnectionRefused return whether err is
    31  // "connect: connection refused"
    32  func IsErrConnectionRefused(err error) bool {
    33  	const errMessage = "connect: connection refused"
    34  	return strings.Contains(err.Error(), errMessage)
    35  }