github.com/gigforks/mattermost-server@v4.9.1-0.20180619094218-800d97fa55d0+incompatible/utils/file_backend_local.go (about)

     1  // Copyright (c) 2017-present Mattermost, Inc. All Rights Reserved.
     2  // See License.txt for license information.
     3  
     4  package utils
     5  
     6  import (
     7  	"bytes"
     8  	"io"
     9  	"io/ioutil"
    10  	"net/http"
    11  	"os"
    12  	"path/filepath"
    13  
    14  	"github.com/mattermost/mattermost-server/mlog"
    15  	"github.com/mattermost/mattermost-server/model"
    16  )
    17  
    18  const (
    19  	TEST_FILE_PATH = "/testfile"
    20  )
    21  
    22  type LocalFileBackend struct {
    23  	directory string
    24  }
    25  
    26  func (b *LocalFileBackend) TestConnection() *model.AppError {
    27  	f := bytes.NewReader([]byte("testingwrite"))
    28  	if _, err := writeFileLocally(f, filepath.Join(b.directory, TEST_FILE_PATH)); err != nil {
    29  		return model.NewAppError("TestFileConnection", "Don't have permissions to write to local path specified or other error.", nil, err.Error(), http.StatusInternalServerError)
    30  	}
    31  	os.Remove(filepath.Join(b.directory, TEST_FILE_PATH))
    32  	mlog.Info("Able to write files to local storage.")
    33  	return nil
    34  }
    35  
    36  func (b *LocalFileBackend) ReadFile(path string) ([]byte, *model.AppError) {
    37  	if f, err := ioutil.ReadFile(filepath.Join(b.directory, path)); err != nil {
    38  		return nil, model.NewAppError("ReadFile", "api.file.read_file.reading_local.app_error", nil, err.Error(), http.StatusInternalServerError)
    39  	} else {
    40  		return f, nil
    41  	}
    42  }
    43  
    44  func (b *LocalFileBackend) CopyFile(oldPath, newPath string) *model.AppError {
    45  	if err := CopyFile(filepath.Join(b.directory, oldPath), filepath.Join(b.directory, newPath)); err != nil {
    46  		return model.NewAppError("copyFile", "api.file.move_file.rename.app_error", nil, err.Error(), http.StatusInternalServerError)
    47  	}
    48  	return nil
    49  }
    50  
    51  func (b *LocalFileBackend) MoveFile(oldPath, newPath string) *model.AppError {
    52  	if err := os.MkdirAll(filepath.Dir(filepath.Join(b.directory, newPath)), 0774); err != nil {
    53  		return model.NewAppError("moveFile", "api.file.move_file.rename.app_error", nil, err.Error(), http.StatusInternalServerError)
    54  	}
    55  
    56  	if err := os.Rename(filepath.Join(b.directory, oldPath), filepath.Join(b.directory, newPath)); err != nil {
    57  		return model.NewAppError("moveFile", "api.file.move_file.rename.app_error", nil, err.Error(), http.StatusInternalServerError)
    58  	}
    59  
    60  	return nil
    61  }
    62  
    63  func (b *LocalFileBackend) WriteFile(fr io.Reader, path string) (int64, *model.AppError) {
    64  	return writeFileLocally(fr, filepath.Join(b.directory, path))
    65  }
    66  
    67  func writeFileLocally(fr io.Reader, path string) (int64, *model.AppError) {
    68  	if err := os.MkdirAll(filepath.Dir(path), 0774); err != nil {
    69  		directory, _ := filepath.Abs(filepath.Dir(path))
    70  		return 0, model.NewAppError("WriteFile", "api.file.write_file_locally.create_dir.app_error", nil, "directory="+directory+", err="+err.Error(), http.StatusInternalServerError)
    71  	}
    72  	fw, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
    73  	if err != nil {
    74  		return 0, model.NewAppError("WriteFile", "api.file.write_file_locally.writing.app_error", nil, err.Error(), http.StatusInternalServerError)
    75  	}
    76  	defer fw.Close()
    77  	written, err := io.Copy(fw, fr)
    78  	if err != nil {
    79  		return written, model.NewAppError("WriteFile", "api.file.write_file_locally.writing.app_error", nil, err.Error(), http.StatusInternalServerError)
    80  	}
    81  	return written, nil
    82  }
    83  
    84  func (b *LocalFileBackend) RemoveFile(path string) *model.AppError {
    85  	if err := os.Remove(filepath.Join(b.directory, path)); err != nil {
    86  		return model.NewAppError("RemoveFile", "utils.file.remove_file.local.app_error", nil, err.Error(), http.StatusInternalServerError)
    87  	}
    88  	return nil
    89  }
    90  
    91  func (b *LocalFileBackend) ListDirectory(path string) (*[]string, *model.AppError) {
    92  	var paths []string
    93  	if fileInfos, err := ioutil.ReadDir(filepath.Join(b.directory, path)); err != nil {
    94  		return nil, model.NewAppError("ListDirectory", "utils.file.list_directory.local.app_error", nil, err.Error(), http.StatusInternalServerError)
    95  	} else {
    96  		for _, fileInfo := range fileInfos {
    97  			if fileInfo.IsDir() {
    98  				paths = append(paths, filepath.Join(path, fileInfo.Name()))
    99  			}
   100  		}
   101  	}
   102  	return &paths, nil
   103  }
   104  
   105  func (b *LocalFileBackend) RemoveDirectory(path string) *model.AppError {
   106  	if err := os.RemoveAll(filepath.Join(b.directory, path)); err != nil {
   107  		return model.NewAppError("RemoveDirectory", "utils.file.remove_directory.local.app_error", nil, err.Error(), http.StatusInternalServerError)
   108  	}
   109  	return nil
   110  }