diff

package

Go to main page

Versions in this module

v1

v1.12.8

Apr 2, 2026

v1.12.7

Mar 31, 2026

v1.12.6

Mar 31, 2026

v1.12.5

Mar 30, 2026

v1.12.4

Mar 17, 2026

v1.12.3

Mar 16, 2026

v1.12.2

Mar 16, 2026

v1.12.1

Mar 14, 2026

v1.12.0

Mar 14, 2026

Changes in this version

type SecuritySchemesDiff

+ Base openapi3.SecuritySchemes

+ Revision openapi3.SecuritySchemes

v1.11.11

Mar 9, 2026

v1.11.10

Feb 5, 2026

Changes in this version

type Config

+ ExcludeExtensions utils.StringSet

+ func (config *Config) IsExcludedExtension(name string) bool

+ func (config *Config) WithExcludeExtensions(excludeExtensions []string) *Config

type Endpoints

+ func (endpoints Endpoints) SortFunc(a, b Endpoint) int

v1.11.9

Feb 2, 2026

v1.11.8

Jan 12, 2026

v1.11.7

Aug 21, 2025

v1.11.6

Aug 19, 2025

Changes in this version

+ type ListOfTypesDiff struct

+ Added []string

+ Deleted []string

+ func (diff *ListOfTypesDiff) Empty() bool

type SchemaDiff

+ ListOfTypesDiff *ListOfTypesDiff

v1.11.5

Aug 3, 2025

Changes in this version

type ComponentsDiff

+ func (diff *ComponentsDiff) Empty() bool

type Diff

+ ComponentsDiff *ComponentsDiff

v1.11.4

May 1, 2025

Changes in this version

+ func IsMediaTypeNameContained(mediaType1, mediaType2 string) bool

type MediaTypeDiff

+ NameDiff *MediaTypeNameDiff

+ type MediaTypeName struct

+ Name string

+ Parameters map[string]string

+ Subtype string

+ Suffix string

+ Type string

+ func ParseMediaTypeName(mediaType string) (*MediaTypeName, error)

+ type MediaTypeNameDiff struct

+ NameDiff *ValueDiff

+ ParametersDiff *StringMapDiff

+ SubtypeDiff *ValueDiff

+ SuffixDiff *ValueDiff

+ TypeDiff *ValueDiff

+ func (diff *MediaTypeNameDiff) Empty() bool

+ func (diff *MediaTypeNameDiff) IsContained() bool

v1.11.3

Apr 16, 2025

v1.11.2

Apr 15, 2025

v1.11.1

Mar 10, 2025

v1.11.0

Mar 10, 2025

Changes in this version

+ const ExcludeDescriptionOption

+ const ExcludeEndpointsOption

+ const ExcludeExamplesOption

+ const ExcludeExtensionsOption

+ const ExcludeSummaryOption

+ const ExcludeTitleOption

+ const SinceDateExtension

+ const SunsetExtension

+ const XExtensibleEnumExtension

+ const XStabilityLevelExtension

+ var DefaultSinceDate = civil.Date

+ var ParamLocations = []string

+ func GetExcludeDiffOptions() []string

+ func GetPathsDiff(config *Config, s1, s2 []*load.SpecInfo) (*Diff, *OperationsSourcesMap, error)

+ func GetWithOperationsSourcesMap(config *Config, s1, s2 *load.SpecInfo) (*Diff, *OperationsSourcesMap, error)

+ type CallbacksDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedCallbacks

+ func (diff *CallbacksDiff) Empty() bool

+ type ComponentsDiff struct

+ CallbacksDiff *CallbacksDiff

+ ExamplesDiff *ExamplesDiff

+ HeadersDiff *HeadersDiff

+ LinksDiff *LinksDiff

+ ParametersDiff *ParametersDiff

+ RequestBodiesDiff *RequestBodiesDiff

+ ResponsesDiff *ResponsesDiff

+ SchemasDiff *SchemasDiff

+ SecuritySchemesDiff *SecuritySchemesDiff

+ type Config struct

+ ExcludeElements utils.StringSet

+ FilterExtension string

+ IncludePathParams bool

+ MatchPath string

+ PathPrefixBase string

+ PathPrefixRevision string

+ PathStripPrefixBase string

+ PathStripPrefixRevision string

+ UnmatchPath string

+ func NewConfig() *Config

+ func (config *Config) IsExcludeDescription() bool

+ func (config *Config) IsExcludeEndpoints() bool

+ func (config *Config) IsExcludeExamples() bool

+ func (config *Config) IsExcludeExtensions() bool

+ func (config *Config) IsExcludeSummary() bool

+ func (config *Config) IsExcludeTitle() bool

+ func (config *Config) WithExcludeElements(excludeElements []string) *Config

+ type ContactDiff struct

+ Added bool

+ Deleted bool

+ EmailDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ NameDiff *ValueDiff

+ URLDiff *ValueDiff

+ func (diff *ContactDiff) Empty() bool

+ type ContentDiff struct

+ MediaTypeAdded utils.StringList

+ MediaTypeDeleted utils.StringList

+ MediaTypeModified ModifiedMediaTypes

+ func (diff *ContentDiff) Empty() bool

+ type DetailName string

+ const CallbacksDetail

+ const EndpointsDetail

+ const ExamplesDetail

+ const ExternalDocsDetail

+ const HeadersDetail

+ const LinksDetail

+ const ParametersDetail

+ const PathsDetail

+ const RequestBodiesDetail

+ const ResponsesDetail

+ const SchemasDetail

+ const SecurityDetail

+ const SecuritySchemesDetail

+ const ServersDetail

+ const TagsDetail

+ type Diff struct

+ EndpointsDiff *EndpointsDiff

+ ExtensionsDiff *ExtensionsDiff

+ ExternalDocsDiff *ExternalDocsDiff

+ InfoDiff *InfoDiff

+ OpenAPIDiff *ValueDiff

+ PathsDiff *PathsDiff

+ SecurityDiff *SecurityRequirementsDiff

+ ServersDiff *ServersDiff

+ TagsDiff *TagsDiff

+ func Get(config *Config, s1, s2 *openapi3.T) (*Diff, error)

+ func (diff *Diff) Empty() bool

+ func (diff *Diff) GetSummary() *Summary

+ func (diff *Diff) Patch(s *openapi3.T) error

+ type DiscriminatorDiff struct

+ Added bool

+ Deleted bool

+ ExtensionsDiff *ExtensionsDiff

+ MappingDiff *StringMapDiff

+ PropertyNameDiff *ValueDiff

+ func (diff *DiscriminatorDiff) Empty() bool

+ type EncodingDiff struct

+ AllowReservedDiff *ValueDiff

+ ContentTypeDiff *ValueDiff

+ ExplodeDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ HeadersDiff *HeadersDiff

+ StyleDiff *ValueDiff

+ func (diff *EncodingDiff) Empty() bool

+ type EncodingsDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedEncodings

+ func (diff *EncodingsDiff) Empty() bool

+ type Endpoint struct

+ Method string

+ Path string

+ type Endpoints []Endpoint

+ func (endpoints Endpoints) Len() int

+ func (endpoints Endpoints) Less(i, j int) bool

+ func (endpoints Endpoints) Swap(i, j int)

+ type EndpointsDiff struct

+ Added Endpoints

+ Deleted Endpoints

+ Modified ModifiedEndpoints

+ func (diff *EndpointsDiff) Empty() bool

+ type EnumDiff struct

+ Added EnumValues

+ Deleted EnumValues

+ EnumAdded bool

+ EnumDeleted bool

+ func (enumDiff *EnumDiff) Empty() bool

+ func (enumDiff *EnumDiff) Patch(enum *[]interface{})

+ type EnumValues []interface

+ type ExampleDiff struct

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ ExternalValueDiff *ValueDiff

+ SummaryDiff *ValueDiff

+ ValueDiff *ValueDiff

+ func (diff *ExampleDiff) Empty() bool

+ type ExamplesDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedExamples

+ func (diff *ExamplesDiff) Empty() bool

+ type ExtensionsDiff InterfaceMapDiff

+ func (diff *ExtensionsDiff) Empty() bool

+ type ExternalDocsDiff struct

+ Added bool

+ Deleted bool

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ URLDiff *ValueDiff

+ func (diff *ExternalDocsDiff) Empty() bool

+ type HeaderDiff struct

+ ContentDiff *ContentDiff

+ DeprecatedDiff *ValueDiff

+ DescriptionDiff *ValueDiff

+ ExampleDiff *ValueDiff

+ ExamplesDiff *ExamplesDiff

+ ExtensionsDiff *ExtensionsDiff

+ RequiredDiff *ValueDiff

+ SchemaDiff *SchemaDiff

+ func (headerDiff *HeaderDiff) Empty() bool

+ type HeadersDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedHeaders

+ func (headersDiff *HeadersDiff) Empty() bool

+ type IDiff interface

+ Empty func() bool

+ type InfoDiff struct

+ Added bool

+ ContactDiff *ContactDiff

+ Deleted bool

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ LicenseDiff *LicenseDiff

+ TermsOfServiceDiff *ValueDiff

+ TitleDiff *ValueDiff

+ VersionDiff *ValueDiff

+ func (diff *InfoDiff) Empty() bool

+ type InterfaceMap map[string]interface

+ type InterfaceMapDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedInterfaces

+ func (diff *InterfaceMapDiff) Empty() bool

+ type JsonOperation struct

+ From string

+ OldValue any

+ Path string

+ Type string

+ Value any

+ func (op *JsonOperation) String() string

+ type JsonPatch []*JsonOperation

+ func (p JsonPatch) Empty() bool

+ type LicenseDiff struct

+ Added bool

+ Deleted bool

+ ExtensionsDiff *ExtensionsDiff

+ NameDiff *ValueDiff

+ URLDiff *ValueDiff

+ func (diff *LicenseDiff) Empty() bool

+ type LinkDiff struct

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ OperationIDDiff *ValueDiff

+ OperationRefDiff *ValueDiff

+ ParametersDiff *InterfaceMapDiff

+ RequestBodyDiff *ValueDiff

+ ServerDiff *ServerDiff

+ func (diff *LinkDiff) Empty() bool

+ type LinksDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedLinks

+ func (diff *LinksDiff) Empty() bool

+ type MediaTypeDiff struct

+ EncodingsDiff *EncodingsDiff

+ ExampleDiff *ValueDiff

+ ExamplesDiff *ExamplesDiff

+ ExtensionsDiff *ExtensionsDiff

+ SchemaDiff *SchemaDiff

+ func (diff *MediaTypeDiff) Empty() bool

+ type MethodDiff struct

+ Base *openapi3.Operation

+ CallbacksDiff *CallbacksDiff

+ DeprecatedDiff *ValueDiff

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ ExternalDocsDiff *ExternalDocsDiff

+ OperationIDDiff *ValueDiff

+ ParametersDiff *ParametersDiffByLocation

+ RequestBodyDiff *RequestBodyDiff

+ ResponsesDiff *ResponsesDiff

+ Revision *openapi3.Operation

+ SecurityDiff *SecurityRequirementsDiff

+ ServersDiff *ServersDiff

+ SummaryDiff *ValueDiff

+ TagsDiff *StringsDiff

+ func (methodDiff *MethodDiff) Empty() bool

+ func (methodDiff *MethodDiff) Patch(operation *openapi3.Operation) error

+ type ModifiedCallbacks map[string]*PathsDiff

+ type ModifiedEncodings map[string]*EncodingDiff

+ type ModifiedEndpoints map[Endpoint]*MethodDiff

+ func (modifiedEndpoints ModifiedEndpoints) ToEndpoints() Endpoints

+ type ModifiedExamples map[string]*ExampleDiff

+ type ModifiedHeaders map[string]*HeaderDiff

+ type ModifiedInterfaces map[string]JsonPatch

+ func (modifiedInterfaces ModifiedInterfaces) Empty() bool

+ type ModifiedKeys map[string]*ValueDiff

+ type ModifiedLinks map[string]*LinkDiff

+ type ModifiedMediaTypes map[string]*MediaTypeDiff

+ type ModifiedOperations map[string]*MethodDiff

+ type ModifiedPaths map[string]*PathDiff

+ type ModifiedRequestBodies map[string]*RequestBodyDiff

+ type ModifiedResponses map[string]*ResponseDiff

+ type ModifiedSchemasMap map[string]*SchemaDiff

+ type ModifiedSecurityRequirements map[string]SecurityScopesDiff

+ type ModifiedSecuritySchemes map[string]*SecuritySchemeDiff

+ type ModifiedServers map[string]*ServerDiff

+ type ModifiedSubschema struct

+ Base Subschema

+ Diff *SchemaDiff

+ Revision Subschema

+ func (modifiedSchema *ModifiedSubschema) String() string

+ type ModifiedSubschemas []*ModifiedSubschema

+ type ModifiedTags map[string]*TagDiff

+ type ModifiedVariables map[string]*VariableDiff

+ type OAuthFlowDiff struct

+ Added bool

+ AuthorizationURLDiff *ValueDiff

+ Deleted bool

+ ExtensionsDiff *ExtensionsDiff

+ RefreshURLDiff *ValueDiff

+ ScopesDiff *StringMapDiff

+ TokenURLDiff *ValueDiff

+ func (diff *OAuthFlowDiff) Empty() bool

+ type OAuthFlowsDiff struct

+ Added bool

+ AuthorizationCodeDiff *OAuthFlowDiff

+ ClientCredentialsDiff *OAuthFlowDiff

+ Deleted bool

+ ExtensionsDiff *ExtensionsDiff

+ ImplicitDiff *OAuthFlowDiff

+ PasswordDiff *OAuthFlowDiff

+ func (diff *OAuthFlowsDiff) Empty() bool

+ type OperationsDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedOperations

+ func (operationsDiff *OperationsDiff) Empty() bool

+ func (operationsDiff *OperationsDiff) Patch(operations map[string]*openapi3.Operation) error

+ type OperationsSourcesMap map[*openapi3.Operation]string

+ type ParamDiffByLocation map[string]ParamDiffs

+ func (params ParamDiffByLocation) Len() int

+ type ParamDiffs map[string]*ParameterDiff

+ type ParamNamesByLocation map[string]utils.StringList

+ func (params ParamNamesByLocation) Len() int

+ type ParameterDiff struct

+ AllowEmptyValueDiff *ValueDiff

+ AllowReservedDiff *ValueDiff

+ Base *openapi3.Parameter

+ ContentDiff *ContentDiff

+ DeprecatedDiff *ValueDiff

+ DescriptionDiff *ValueDiff

+ ExampleDiff *ValueDiff

+ ExamplesDiff *ExamplesDiff

+ ExplodeDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ InDiff *ValueDiff

+ NameDiff *ValueDiff

+ RequiredDiff *ValueDiff

+ Revision *openapi3.Parameter

+ SchemaDiff *SchemaDiff

+ StyleDiff *ValueDiff

+ func (diff *ParameterDiff) Empty() bool

+ func (diff *ParameterDiff) Patch(parameter *openapi3.Parameter) error

+ type ParametersDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ParamDiffs

+ func (diff *ParametersDiff) Empty() bool

+ type ParametersDiffByLocation struct

+ Added ParamNamesByLocation

+ Deleted ParamNamesByLocation

+ Modified ParamDiffByLocation

+ func (diff *ParametersDiffByLocation) Empty() bool

+ func (diff *ParametersDiffByLocation) Patch(parameters openapi3.Parameters) error

+ type PathDiff struct

+ Base *openapi3.PathItem

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ OperationsDiff *OperationsDiff

+ ParametersDiff *ParametersDiffByLocation

+ RefDiff *ValueDiff

+ Revision *openapi3.PathItem

+ ServersDiff *ServersDiff

+ SummaryDiff *ValueDiff

+ func (pathDiff *PathDiff) Empty() bool

+ func (pathDiff *PathDiff) Patch(pathItem *openapi3.PathItem) error

+ type PathParamsMap utils.StringMap

+ func NewPathParamsMap(pathParams1, pathParams2 []string) (PathParamsMap, bool)

+ func (pathParamsMap PathParamsMap) Inverse() PathParamsMap

+ type PathsDiff struct

+ Added utils.StringList

+ Base *openapi3.Paths

+ Deleted utils.StringList

+ Modified ModifiedPaths

+ Revision *openapi3.Paths

+ func (pathsDiff *PathsDiff) Empty() bool

+ func (pathsDiff *PathsDiff) Patch(paths *openapi3.Paths) error

+ type RequestBodiesDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedRequestBodies

+ func (requestBodiesDiff *RequestBodiesDiff) Empty() bool

+ type RequestBodyDiff struct

+ Added bool

+ ContentDiff *ContentDiff

+ Deleted bool

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ RequiredDiff *ValueDiff

+ func (diff *RequestBodyDiff) Empty() bool

+ type RequiredPropertiesDiff struct

+ func (diff *RequiredPropertiesDiff) Empty() bool

+ type ResponseDiff struct

+ Base *openapi3.Response

+ ContentDiff *ContentDiff

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ HeadersDiff *HeadersDiff

+ LinksDiff *LinksDiff

+ Revision *openapi3.Response

+ func (diff *ResponseDiff) Empty() bool

+ type ResponsesDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedResponses

+ func (responsesDiff *ResponsesDiff) Empty() bool

+ type SchemaDiff struct

+ AdditionalPropertiesAllowedDiff *ValueDiff

+ AdditionalPropertiesDiff *SchemaDiff

+ AllOfDiff *SubschemasDiff

+ AllowEmptyValueDiff *ValueDiff

+ AnyOfDiff *SubschemasDiff

+ Base *openapi3.Schema

+ CircularRefDiff bool

+ DefaultDiff *ValueDiff

+ DeprecatedDiff *ValueDiff

+ DescriptionDiff *ValueDiff

+ DiscriminatorDiff *DiscriminatorDiff

+ EnumDiff *EnumDiff

+ ExampleDiff *ValueDiff

+ ExclusiveMaxDiff *ValueDiff

+ ExclusiveMinDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ ExternalDocsDiff *ExternalDocsDiff

+ FormatDiff *ValueDiff

+ ItemsDiff *SchemaDiff

+ MaxDiff *ValueDiff

+ MaxItemsDiff *ValueDiff

+ MaxLengthDiff *ValueDiff

+ MaxPropsDiff *ValueDiff

+ MinDiff *ValueDiff

+ MinItemsDiff *ValueDiff

+ MinLengthDiff *ValueDiff

+ MinPropsDiff *ValueDiff

+ MultipleOfDiff *ValueDiff

+ NotDiff *SchemaDiff

+ NullableDiff *ValueDiff

+ OneOfDiff *SubschemasDiff

+ PatternDiff *ValueDiff

+ PropertiesDiff *SchemasDiff

+ ReadOnlyDiff *ValueDiff

+ RequiredDiff *RequiredPropertiesDiff

+ Revision *openapi3.Schema

+ SchemaAdded bool

+ SchemaDeleted bool

+ TitleDiff *ValueDiff

+ TypeDiff *StringsDiff

+ UniqueItemsDiff *ValueDiff

+ WriteOnlyDiff *ValueDiff

+ XMLDiff *ValueDiff

+ func (diff *SchemaDiff) Empty() bool

+ func (diff *SchemaDiff) Patch(schema *openapi3.Schema) error

+ type SchemasDiff struct

+ Added utils.StringList

+ Base openapi3.Schemas

+ Deleted utils.StringList

+ Modified ModifiedSchemasMap

+ Revision openapi3.Schemas

+ func (schemasDiff *SchemasDiff) Empty() bool

+ type SecurityRequirementsDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedSecurityRequirements

+ func (diff *SecurityRequirementsDiff) Empty() bool

+ type SecuritySchemeDiff struct

+ BearerFormatDiff *ValueDiff

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ InDiff *ValueDiff

+ NameDiff *ValueDiff

+ OAuthFlowsDiff *OAuthFlowsDiff

+ OpenIDConnectURLDiff *ValueDiff

+ SchemeDiff *ValueDiff

+ TypeDiff *ValueDiff

+ func (diff *SecuritySchemeDiff) Empty() bool

+ type SecuritySchemesDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedSecuritySchemes

+ func (diff *SecuritySchemesDiff) Empty() bool

+ type SecurityScopesDiff map[string]*StringsDiff

+ func (diff SecurityScopesDiff) Empty() bool

+ type ServerDiff struct

+ Added bool

+ Deleted bool

+ DescriptionDiff *ValueDiff

+ ExtensionsDiff *ExtensionsDiff

+ URLDiff *ValueDiff

+ VariablesDiff *VariablesDiff

+ func (diff *ServerDiff) Empty() bool

+ type ServersDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedServers

+ func (diff *ServersDiff) Empty() bool

+ type StringMapDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedKeys

+ func (diff *StringMapDiff) Empty() bool

+ type StringsDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ func (stringsDiff *StringsDiff) Empty() bool

+ type Subschema struct

+ Component string

+ Index int

+ Title string

+ func (subschema Subschema) String() string

+ type Subschemas []Subschema

+ func (schemas Subschemas) String() string

+ type SubschemasDiff struct

+ Added Subschemas

+ Deleted Subschemas

+ Modified ModifiedSubschemas

+ func NewSubschemasDiff() *SubschemasDiff

+ func (diff *SubschemasDiff) Empty() bool

+ type Summary struct

+ Details map[DetailName]*SummaryDetails

+ Diff bool

+ func (summary *Summary) GetSummaryDetails(name DetailName) SummaryDetails

+ type SummaryDetails struct

+ Added int

+ Deleted int

+ Modified int

+ type TagDiff struct

+ DescriptionDiff *ValueDiff

+ NameDiff *ValueDiff

+ func (diff *TagDiff) Empty() bool

+ type TagsDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedTags

+ func (tagsDiff *TagsDiff) Empty() bool

+ type ValueDiff struct

+ From interface{}

+ To interface{}

+ func (diff *ValueDiff) Empty() bool

+ type VariableDiff struct

+ DefaultDiff *ValueDiff

+ DescriptionDiff *ValueDiff

+ EnumDiff *StringsDiff

+ ExtensionsDiff *ExtensionsDiff

+ func (diff *VariableDiff) Empty() bool

+ type VariablesDiff struct

+ Added utils.StringList

+ Deleted utils.StringList

+ Modified ModifiedVariables

+ func (diff *VariablesDiff) Empty() bool

?	: This menu
/	: Search site
f or F	: Jump to
y or Y	: Canonical URL