// Copyright © 2023 OpenIM SDK. All rights reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package file import ( "io" ) func NewProgressReader(r io.Reader, fn func(current int64)) io.Reader { if r == nil || fn == nil { return r } return &Reader{ r: r, fn: fn, } } type Reader struct { r io.Reader read int64 fn func(current int64) } func (r *Reader) Read(p []byte) (n int, err error) { n, err = r.r.Read(p) if err == nil && n > 0 { r.read += int64(n) r.fn(r.read) } return n, err }