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108 lines
3.2 KiB
108 lines
3.2 KiB
/*
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* Minio Cloud Storage, (C) 2016 Minio, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package madmin
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import (
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"crypto/sha256"
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"io"
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"io/ioutil"
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"net"
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"net/http"
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"net/url"
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"strings"
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"github.com/minio/minio-go/pkg/s3utils"
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)
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// sum256 calculate sha256 sum for an input byte array.
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func sum256(data []byte) []byte {
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hash := sha256.New()
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hash.Write(data)
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return hash.Sum(nil)
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}
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// getEndpointURL - construct a new endpoint.
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func getEndpointURL(endpoint string, secure bool) (*url.URL, error) {
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if strings.Contains(endpoint, ":") {
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host, _, err := net.SplitHostPort(endpoint)
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if err != nil {
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return nil, err
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}
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if !s3utils.IsValidIP(host) && !s3utils.IsValidDomain(host) {
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msg := "Endpoint: " + endpoint + " does not follow ip address or domain name standards."
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return nil, ErrInvalidArgument(msg)
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}
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} else {
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if !s3utils.IsValidIP(endpoint) && !s3utils.IsValidDomain(endpoint) {
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msg := "Endpoint: " + endpoint + " does not follow ip address or domain name standards."
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return nil, ErrInvalidArgument(msg)
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}
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}
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// If secure is false, use 'http' scheme.
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scheme := "https"
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if !secure {
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scheme = "http"
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}
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// Construct a secured endpoint URL.
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endpointURLStr := scheme + "://" + endpoint
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endpointURL, err := url.Parse(endpointURLStr)
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if err != nil {
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return nil, err
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}
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// Validate incoming endpoint URL.
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if err := isValidEndpointURL(endpointURL.String()); err != nil {
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return nil, err
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}
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return endpointURL, nil
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}
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// Verify if input endpoint URL is valid.
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func isValidEndpointURL(endpointURL string) error {
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if endpointURL == "" {
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return ErrInvalidArgument("Endpoint url cannot be empty.")
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}
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url, err := url.Parse(endpointURL)
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if err != nil {
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return ErrInvalidArgument("Endpoint url cannot be parsed.")
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}
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if url.Path != "/" && url.Path != "" {
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return ErrInvalidArgument("Endpoint url cannot have fully qualified paths.")
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}
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return nil
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}
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// closeResponse close non nil response with any response Body.
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// convenient wrapper to drain any remaining data on response body.
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//
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// Subsequently this allows golang http RoundTripper
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// to re-use the same connection for future requests.
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func closeResponse(resp *http.Response) {
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// Callers should close resp.Body when done reading from it.
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// If resp.Body is not closed, the Client's underlying RoundTripper
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// (typically Transport) may not be able to re-use a persistent TCP
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// connection to the server for a subsequent "keep-alive" request.
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if resp != nil && resp.Body != nil {
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// Drain any remaining Body and then close the connection.
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// Without this closing connection would disallow re-using
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// the same connection for future uses.
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// - http://stackoverflow.com/a/17961593/4465767
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io.Copy(ioutil.Discard, resp.Body)
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resp.Body.Close()
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}
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}
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