119 lines
2.6 KiB
Go
119 lines
2.6 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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"fmt"
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"io"
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"net/http"
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)
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const (
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TimeFormat = "Mon, 02 Jan 2006 15:04:05 GMT"
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)
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type Response struct {
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Status string
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StatusCode int
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Header Header
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Body io.ReadCloser
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ContentLength int64
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// validate this response is okay to transfer in p2p network, like status 200 or 206 in http is valid to do this,
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// otherwise return status code to original client
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Validate func() error
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}
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func NewResponse(rc io.ReadCloser, opts ...func(*Response)) *Response {
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if rc == nil {
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// for custom plugin, return an error body
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rc = &errorBody{
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fmt.Errorf("empty io.ReadCloser, please check resource plugin implement")}
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}
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resp := &Response{
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Header: make(Header),
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Status: "OK",
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StatusCode: http.StatusOK,
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Body: rc,
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ContentLength: -1,
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Validate: func() error {
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return nil
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},
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}
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for _, opt := range opts {
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opt(resp)
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}
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return resp
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}
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func WithStatus(code int, status string) func(*Response) {
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return func(resp *Response) {
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resp.StatusCode = code
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resp.Status = status
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}
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}
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func WithContentLength(length int64) func(*Response) {
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return func(resp *Response) {
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resp.ContentLength = length
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}
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}
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func WithHeader(header map[string]string) func(*Response) {
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return func(resp *Response) {
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for k, v := range header {
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resp.Header.Set(k, v)
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}
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}
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}
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func WithExpireInfo(info ExpireInfo) func(*Response) {
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return func(resp *Response) {
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if len(info.LastModified) > 0 {
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resp.Header.Set(LastModified, info.LastModified)
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}
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if len(info.ETag) > 0 {
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resp.Header.Set(ETag, info.ETag)
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}
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}
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}
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func WithValidate(validate func() error) func(*Response) {
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return func(resp *Response) {
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resp.Validate = validate
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}
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}
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func (resp *Response) ExpireInfo() ExpireInfo {
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return ExpireInfo{
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LastModified: resp.Header.Get(LastModified),
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ETag: resp.Header.Get(ETag),
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}
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}
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type errorBody struct {
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error
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}
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func (e *errorBody) Read(p []byte) (n int, err error) {
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return 0, e.error
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}
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func (e *errorBody) Close() error {
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return nil
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}
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