86 lines
2.5 KiB
Go
86 lines
2.5 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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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 source
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import (
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"io"
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)
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var clients = make(map[string]ResourceClient)
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func Register(schema string, resourceClient ResourceClient) {
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clients[schema] = resourceClient
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}
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func NewSourceClient() (ResourceClient, error) {
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return &ResourceClientAdaptor{
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clients: clients,
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}, nil
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}
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// SourceClient supply apis that interact with the source.
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type ResourceClient interface {
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// GetContentLength get content length from source
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GetContentLength(url string, headers map[string]string) (int64, error)
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// IsSupportRange checks if source supports breakpoint continuation
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IsSupportRange(url string, headers map[string]string) (bool, error)
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// IsExpired checks if cache is expired
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IsExpired(url string, headers, expireInfo map[string]string) (bool, error)
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// Download download from source
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Download(url string, headers map[string]string) (io.ReadCloser, map[string]string, error)
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}
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type ResourceClientAdaptor struct {
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clients map[string]ResourceClient
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}
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func (s *ResourceClientAdaptor) GetContentLength(url string, headers map[string]string) (int64, error) {
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sourceClient, err := s.getSourceClient(url)
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if err != nil {
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return -1, err
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}
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return sourceClient.GetContentLength(url, headers)
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}
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func (s *ResourceClientAdaptor) IsSupportRange(url string, headers map[string]string) (bool, error) {
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sourceClient, err := s.getSourceClient(url)
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if err != nil {
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return false, err
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}
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return sourceClient.IsSupportRange(url, headers)
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}
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func (s *ResourceClientAdaptor) IsExpired(url string, headers, expireInfo map[string]string) (bool, error) {
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sourceClient, err := s.getSourceClient(url)
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if err != nil {
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return false, err
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}
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return sourceClient.IsExpired(url, headers, expireInfo)
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}
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func (s *ResourceClientAdaptor) Download(url string, headers map[string]string) (io.ReadCloser, map[string]string, error) {
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sourceClient, err := s.getSourceClient(url)
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if err != nil {
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return nil, nil, err
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}
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return sourceClient.Download(url, headers)
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}
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