github.com/XiaoMi/Gaea@v1.2.5/models/file/file.go (about)

     1  // Copyright 2019 The Gaea Authors. All Rights Reserved.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package file
    16  
    17  import (
    18  	"errors"
    19  	"io/ioutil"
    20  	"os"
    21  	"strings"
    22  	"time"
    23  
    24  	"github.com/XiaoMi/Gaea/log"
    25  )
    26  
    27  const (
    28  	defaultFilePath = "./etc/file"
    29  )
    30  
    31  // Client used to test with config from file
    32  type Client struct {
    33  	Prefix string
    34  }
    35  
    36  // New constructor of EtcdClient
    37  func New(path string) (*Client, error) {
    38  	if strings.TrimSpace(path) == "" {
    39  		path = defaultFilePath
    40  	}
    41  	if err := checkDir(path); err != nil {
    42  		log.Warn("check file config directory failed, %v", err)
    43  		return nil, err
    44  	}
    45  	return &Client{Prefix: path}, nil
    46  }
    47  
    48  func checkDir(path string) error {
    49  	if strings.TrimSpace(path) == "" {
    50  		return errors.New("invalid path")
    51  	}
    52  	stat, err := os.Stat(path)
    53  	if err != nil {
    54  		return err
    55  	}
    56  
    57  	if !stat.IsDir() {
    58  		return errors.New("invalid path, should be a directory")
    59  	}
    60  
    61  	return nil
    62  }
    63  
    64  // Close do nothing
    65  func (c *Client) Close() error {
    66  	return nil
    67  }
    68  
    69  // Create do nothing
    70  func (c *Client) Create(path string, data []byte) error {
    71  	return nil
    72  }
    73  
    74  // Update do nothing
    75  func (c *Client) Update(path string, data []byte) error {
    76  	return nil
    77  }
    78  
    79  // UpdateWithTTL update path with data and ttl
    80  func (c *Client) UpdateWithTTL(path string, data []byte, ttl time.Duration) error {
    81  	return nil
    82  }
    83  
    84  // Delete delete path
    85  func (c *Client) Delete(path string) error {
    86  	return nil
    87  }
    88  
    89  // Read read file data
    90  func (c *Client) Read(file string) ([]byte, error) {
    91  	value, err := ioutil.ReadFile(file)
    92  	if err != nil {
    93  		return nil, err
    94  	}
    95  	return value, nil
    96  }
    97  
    98  // List list path, return slice of all files
    99  func (c *Client) List(path string) ([]string, error) {
   100  	r := make([]string, 0)
   101  	files, err := ioutil.ReadDir(path)
   102  	if err != nil {
   103  		return r, err
   104  	}
   105  
   106  	for _, f := range files {
   107  		r = append(r, f.Name())
   108  	}
   109  
   110  	return r, nil
   111  }
   112  
   113  // BasePrefix return base prefix
   114  func (c *Client) BasePrefix() string {
   115  	return c.Prefix
   116  }