github.com/matrixorigin/matrixone@v0.7.0/pkg/fileservice/path.go (about)

     1  // Copyright 2022 Matrix Origin
     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 fileservice
    16  
    17  import (
    18  	"encoding/csv"
    19  	"os"
    20  	"strings"
    21  	"unicode"
    22  
    23  	"github.com/matrixorigin/matrixone/pkg/common/moerr"
    24  )
    25  
    26  const ServiceNameSeparator = ":"
    27  
    28  type Path struct {
    29  	Service          string
    30  	ServiceArguments []string
    31  	File             string
    32  }
    33  
    34  func ParsePath(s string) (path Path, err error) {
    35  	// split
    36  	i := strings.LastIndex(s, ServiceNameSeparator)
    37  	if i == -1 {
    38  		// no service part
    39  		path.File = s
    40  	} else {
    41  		// with service part
    42  		path.Service, path.ServiceArguments, err = parseService(s[:i])
    43  		if err != nil {
    44  			return
    45  		}
    46  		path.File = s[i+1:]
    47  	}
    48  
    49  	// validate
    50  	for _, r := range path.File {
    51  		// most common patterns first
    52  		if r >= '0' && r <= '9' ||
    53  			r >= 'a' && r <= 'z' ||
    54  			r >= 'A' && r <= 'Z' {
    55  			continue
    56  		}
    57  		switch r {
    58  		case '!', '-', '_', '.', '*', '\'', '(', ')', '@', '/':
    59  			continue
    60  		}
    61  		// printable non-ASCII characters
    62  		if r > unicode.MaxASCII && unicode.IsPrint(r) {
    63  			continue
    64  		}
    65  		err = moerr.NewInvalidPathNoCtx(path.File)
    66  		return
    67  	}
    68  
    69  	path.File = strings.TrimLeft(path.File, "/") // trim leading /
    70  
    71  	return
    72  }
    73  
    74  func parseService(str string) (service string, arguments []string, err error) {
    75  	r := csv.NewReader(strings.NewReader(str))
    76  	records, err := r.ReadAll()
    77  	if err != nil {
    78  		return
    79  	}
    80  	if len(records) != 1 {
    81  		err = moerr.NewInvalidInputNoCtx("bad service: %v", str)
    82  		return
    83  	}
    84  	service = records[0][0]
    85  	arguments = records[0][1:]
    86  	return
    87  }
    88  
    89  func ParsePathAtService(s string, serviceName string) (path Path, err error) {
    90  	path, err = ParsePath(s)
    91  	if err != nil {
    92  		return
    93  	}
    94  	if serviceName != "" &&
    95  		path.Service != "" &&
    96  		!strings.EqualFold(path.Service, serviceName) {
    97  		err = moerr.NewWrongServiceNoCtx(serviceName, path.Service)
    98  		return
    99  	}
   100  	return
   101  }
   102  
   103  func JoinPath(serviceName string, path string) string {
   104  	buf := new(strings.Builder)
   105  	buf.WriteString(serviceName)
   106  	buf.WriteString(ServiceNameSeparator)
   107  	buf.WriteString(path)
   108  	return buf.String()
   109  }
   110  
   111  var osPathSeparatorStr = string([]rune{os.PathSeparator})
   112  
   113  func toOSPath(filePath string) string {
   114  	if os.PathSeparator == '/' {
   115  		return filePath
   116  	}
   117  	return strings.ReplaceAll(filePath, "/", osPathSeparatorStr)
   118  }