diff --git a/README.md b/README.md index ef073fa..9c631d6 100644 --- a/README.md +++ b/README.md @@ -222,8 +222,10 @@ Baked-in Validations ### Other: | Tag | Description | | - | - | -| dir | Directory | -| file | File path | +| dir | Existing Directory | +| dirpath | Directory Path | +| file | Existing File | +| filepath | File Path | | isdefault | Is Default | | len | Length | | max | Maximum | diff --git a/baked_in.go b/baked_in.go index 122f30f..028bc84 100644 --- a/baked_in.go +++ b/baked_in.go @@ -7,6 +7,7 @@ import ( "encoding/hex" "encoding/json" "fmt" + "io/fs" "net" "net/url" "os" @@ -14,13 +15,14 @@ import ( "strconv" "strings" "sync" + "syscall" "time" "unicode/utf8" "golang.org/x/crypto/sha3" "golang.org/x/text/language" - urn "github.com/leodido/go-urn" + "github.com/leodido/go-urn" ) // Func accepts a FieldLevel interface for all validation needs. The return @@ -127,6 +129,7 @@ var ( "uri": isURI, "urn_rfc2141": isUrnRFC2141, // RFC 2141 "file": isFile, + "filepath": isFilePath, "base64": isBase64, "base64url": isBase64URL, "base64rawurl": isBase64RawURL, @@ -199,6 +202,7 @@ var ( "html_encoded": isHTMLEncoded, "url_encoded": isURLEncoded, "dir": isDir, + "dirpath": isDirPath, "json": isJSON, "jwt": isJWT, "hostname_port": isHostnamePort, @@ -1464,7 +1468,7 @@ func isUrnRFC2141(fl FieldLevel) bool { panic(fmt.Sprintf("Bad field type %T", field.Interface())) } -// isFile is the validation function for validating if the current field's value is a valid file path. +// isFile is the validation function for validating if the current field's value is a valid existing file path. func isFile(fl FieldLevel) bool { field := fl.Field() @@ -1481,6 +1485,57 @@ func isFile(fl FieldLevel) bool { panic(fmt.Sprintf("Bad field type %T", field.Interface())) } +// isFilePath is the validation function for validating if the current field's value is a valid file path. +func isFilePath(fl FieldLevel) bool { + + var exists bool + var err error + + field := fl.Field() + + // If it exists, it obviously is valid. + // This is done first to avoid code duplication and unnecessary additional logic. + if exists = isFile(fl); exists { + return true + } + + // It does not exist but may still be a valid filepath. + switch field.Kind() { + case reflect.String: + // Every OS allows for whitespace, but none + // let you use a file with no filename (to my knowledge). + // Unless you're dealing with raw inodes, but I digress. + if strings.TrimSpace(field.String()) == "" { + return false + } + // We make sure it isn't a directory. + if strings.HasSuffix(field.String(), string(os.PathSeparator)) { + return false + } + if _, err = os.Stat(field.String()); err != nil { + switch t := err.(type) { + case *fs.PathError: + if t.Err == syscall.EINVAL { + // It's definitely an invalid character in the filepath. + return false + } + // It could be a permission error, a does-not-exist error, etc. + // Out-of-scope for this validation, though. + return true + default: + // Something went *seriously* wrong. + /* + Per https://pkg.go.dev/os#Stat: + "If there is an error, it will be of type *PathError." + */ + panic(err) + } + } + } + + panic(fmt.Sprintf("Bad field type %T", field.Interface())) +} + // isE164 is the validation function for validating if the current field's value is a valid e.164 formatted phone number. func isE164(fl FieldLevel) bool { return e164Regex.MatchString(fl.Field().String()) @@ -2354,7 +2409,7 @@ func isFQDN(fl FieldLevel) bool { return fqdnRegexRFC1123.MatchString(val) } -// isDir is the validation function for validating if the current field's value is a valid directory. +// isDir is the validation function for validating if the current field's value is a valid existing directory. func isDir(fl FieldLevel) bool { field := fl.Field() @@ -2370,6 +2425,64 @@ func isDir(fl FieldLevel) bool { panic(fmt.Sprintf("Bad field type %T", field.Interface())) } +// isDirPath is the validation function for validating if the current field's value is a valid directory. +func isDirPath(fl FieldLevel) bool { + + var exists bool + var err error + + field := fl.Field() + + // If it exists, it obviously is valid. + // This is done first to avoid code duplication and unnecessary additional logic. + if exists = isDir(fl); exists { + return true + } + + // It does not exist but may still be a valid path. + switch field.Kind() { + case reflect.String: + // Every OS allows for whitespace, but none + // let you use a dir with no name (to my knowledge). + // Unless you're dealing with raw inodes, but I digress. + if strings.TrimSpace(field.String()) == "" { + return false + } + if _, err = os.Stat(field.String()); err != nil { + switch t := err.(type) { + case *fs.PathError: + if t.Err == syscall.EINVAL { + // It's definitely an invalid character in the path. + return false + } + // It could be a permission error, a does-not-exist error, etc. + // Out-of-scope for this validation, though. + // Lastly, we make sure it is a directory. + if strings.HasSuffix(field.String(), string(os.PathSeparator)) { + return true + } else { + return false + } + default: + // Something went *seriously* wrong. + /* + Per https://pkg.go.dev/os#Stat: + "If there is an error, it will be of type *PathError." + */ + panic(err) + } + } + // We repeat the check here to make sure it is an explicit directory in case the above os.Stat didn't trigger an error. + if strings.HasSuffix(field.String(), string(os.PathSeparator)) { + return true + } else { + return false + } + } + + panic(fmt.Sprintf("Bad field type %T", field.Interface())) +} + // isJSON is the validation function for validating if the current field's value is a valid json string. func isJSON(fl FieldLevel) bool { field := fl.Field() diff --git a/doc.go b/doc.go index e0b79b7..bffabc4 100644 --- a/doc.go +++ b/doc.go @@ -863,7 +863,8 @@ This validates that a string value is a valid JWT Usage: jwt -# File path + +# File This validates that a string value contains a valid file path and that the file exists on the machine. @@ -871,6 +872,16 @@ This is done using os.Stat, which is a platform independent function. Usage: file + +# File Path + +This validates that a string value contains a valid file path but does not +validate the existence of that file. +This is done using os.Stat, which is a platform independent function. + + Usage: filepath + + # URL String This validates that a string value contains a valid url @@ -912,6 +923,7 @@ you can use this with the omitempty tag. Usage: base64url + # Base64RawURL String This validates that a string value contains a valid base64 URL safe value, @@ -922,6 +934,7 @@ you can use this with the omitempty tag. Usage: base64url + # Bitcoin Address This validates that a string value contains a valid bitcoin address. @@ -1254,6 +1267,18 @@ This is done using os.Stat, which is a platform independent function. Usage: dir + +# Directory Path + +This validates that a string value contains a valid directory but does +not validate the existence of that directory. +This is done using os.Stat, which is a platform independent function. +It is safest to suffix the string with os.PathSeparator if the directory +may not exist at the time of validation. + + Usage: dirpath + + # HostPort This validates that a string value contains a valid DNS hostname and port that diff --git a/validator_test.go b/validator_test.go index 8e1ea3e..a4beb9f 100644 --- a/validator_test.go +++ b/validator_test.go @@ -8,6 +8,7 @@ import ( "encoding/base64" "encoding/json" "fmt" + "os" "path/filepath" "reflect" "strings" @@ -3819,12 +3820,14 @@ func TestDataURIValidation(t *testing.T) { {"data:image/png;base64,TG9yZW0gaXBzdW0gZG9sb3Igc2l0IGFtZXQsIGNvbnNlY3RldHVyIGFkaXBpc2NpbmcgZWxpdC4=", true}, {"data:text/plain;base64,Vml2YW11cyBmZXJtZW50dW0gc2VtcGVyIHBvcnRhLg==", true}, {"image/gif;base64,U3VzcGVuZGlzc2UgbGVjdHVzIGxlbw==", false}, - {"data:image/gif;base64,MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuMPNS1Ufof9EW/M98FNw" + - "UAKrwflsqVxaxQjBQnHQmiI7Vac40t8x7pIb8gLGV6wL7sBTJiPovJ0V7y7oc0Ye" + - "rhKh0Rm4skP2z/jHwwZICgGzBvA0rH8xlhUiTvcwDCJ0kc+fh35hNt8srZQM4619" + - "FTgB66Xmp4EtVyhpQV+t02g6NzK72oZI0vnAvqhpkxLeLiMCyrI416wHm5Tkukhx" + - "QmcL2a6hNOyu0ixX/x2kSFXApEnVrJ+/IxGyfyw8kf4N2IZpW5nEP847lpfj0SZZ" + - "Fwrd1mnfnDbYohX2zRptLy2ZUn06Qo9pkG5ntvFEPo9bfZeULtjYzIl6K8gJ2uGZ" + "HQIDAQAB", true}, + { + "data:image/gif;base64,MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAuMPNS1Ufof9EW/M98FNw" + + "UAKrwflsqVxaxQjBQnHQmiI7Vac40t8x7pIb8gLGV6wL7sBTJiPovJ0V7y7oc0Ye" + + "rhKh0Rm4skP2z/jHwwZICgGzBvA0rH8xlhUiTvcwDCJ0kc+fh35hNt8srZQM4619" + + "FTgB66Xmp4EtVyhpQV+t02g6NzK72oZI0vnAvqhpkxLeLiMCyrI416wHm5Tkukhx" + + "QmcL2a6hNOyu0ixX/x2kSFXApEnVrJ+/IxGyfyw8kf4N2IZpW5nEP847lpfj0SZZ" + + "Fwrd1mnfnDbYohX2zRptLy2ZUn06Qo9pkG5ntvFEPo9bfZeULtjYzIl6K8gJ2uGZ" + "HQIDAQAB", true, + }, {"data:image/png;base64,12345", false}, {"", false}, {"data:text,:;base85,U3VzcGVuZGlzc2UgbGVjdHVzIGxlbw==", false}, @@ -5732,6 +5735,39 @@ func TestFileValidation(t *testing.T) { }, "Bad field type int") } +func TestFilePathValidation(t *testing.T) { + validate := New() + + tests := []struct { + title string + param string + expected bool + }{ + {"empty filepath", "", false}, + {"valid filepath", filepath.Join("testdata", "a.go"), true}, + {"invalid filepath", filepath.Join("testdata", "no\000.go"), false}, + {"directory, not a filepath", "testdata" + string(os.PathSeparator), false}, + } + + for _, test := range tests { + errs := validate.Var(test.param, "filepath") + + if test.expected { + if !IsEqual(errs, nil) { + t.Fatalf("Test: '%s' failed Error: %s", test.title, errs) + } + } else { + if IsEqual(errs, nil) { + t.Fatalf("Test: '%s' failed Error: %s", test.title, errs) + } + } + } + + PanicMatches(t, func() { + _ = validate.Var(6, "filepath") + }, "Bad field type int") +} + func TestEthereumAddressValidation(t *testing.T) { validate := New() @@ -10569,6 +10605,40 @@ func TestDirValidation(t *testing.T) { }, "Bad field type int") } +func TestDirPathValidation(t *testing.T) { + validate := New() + + tests := []struct { + title string + param string + expected bool + }{ + {"empty dirpath", "", false}, + {"valid dirpath - exists", "testdata", true}, + {"valid dirpath - explicit", "testdatanoexist" + string(os.PathSeparator), true}, + {"invalid dirpath", "testdata\000" + string(os.PathSeparator), false}, + {"file, not a dirpath", filepath.Join("testdata", "a.go"), false}, + } + + for _, test := range tests { + errs := validate.Var(test.param, "dirpath") + + if test.expected { + if !IsEqual(errs, nil) { + t.Fatalf("Test: '%s' failed Error: %s", test.title, errs) + } + } else { + if IsEqual(errs, nil) { + t.Fatalf("Test: '%s' failed Error: %s", test.title, errs) + } + } + } + + PanicMatches(t, func() { + _ = validate.Var(6, "filepath") + }, "Bad field type int") +} + func TestStartsWithValidation(t *testing.T) { tests := []struct { Value string `validate:"startswith=(/^ヮ^)/*:・ﾟ✧"` @@ -12361,10 +12431,12 @@ func TestPostCodeByIso3166Alpha2(t *testing.T) { {"00803", true}, {"1234567", false}, }, - "LC": { // not support regexp for post code + "LC": { + // not support regexp for post code {"123456", false}, }, - "XX": { // not support country + "XX": { + // not support country {"123456", false}, }, }