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file.go
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file.go
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// Copyright 2016 cbping. 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.
//
// 文件操作
//
package file
import (
"bytes"
"io"
"io/ioutil"
"net/http"
"os"
"path"
"strings"
)
// 下载文件
func DownLoadVideo(httpSrc, dst string) (n int64, err error) {
os.MkdirAll(path.Dir(dst), os.ModeDir)
out, err := os.Create(dst)
if err != nil {
return
}
defer out.Close()
resp, err := http.Get(httpSrc)
if err != nil {
return
}
defer resp.Body.Close()
pix, err := ioutil.ReadAll(resp.Body)
if err != nil {
return
}
n, err = io.Copy(out, bytes.NewReader(pix))
if err != nil {
DeletePath(dst)
}
return
}
// 复制文件
func CopyFile(src, dst string) (n int64, err error) {
os.MkdirAll(path.Dir(dst), os.ModeDir)
os.MkdirAll(path.Dir(src), os.ModeDir)
out, err := os.Create(dst)
if err != nil {
return
}
defer out.Close()
in, err := os.Open(src)
if err != nil {
return
}
defer in.Close()
pix, err := ioutil.ReadAll(in)
if err != nil {
return
}
n, err = io.Copy(out, bytes.NewReader(pix))
if err != nil {
DeletePath(dst)
}
return
}
// 获取本地文件路径
func LocalMapVideo(rootDir, httpUrl string) (localPath string) {
path := strings.Split(httpUrl, "/")
if len(path) > 1 {
localPath = rootDir + "/" + path[len(path)-1]
}
return
}
// 路径是否存在
func PathExists(path string) (bool, error) {
_, err := os.Stat(path)
if err == nil {
return true, nil
}
if os.IsNotExist(err) {
return false, nil
}
return false, err
}
// 删除文件或者整个目录,谨慎使用
func DeletePath(path string) error {
return os.RemoveAll(path)
}