types

package
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 Go to latest Published: Nov 26, 2024 License: Apache-2.0 Imports: 11 Imported by: 138

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Constants

View Source 
const (
	// MaxButlerLogBundleSize is the maximum size, in bytes, of the data section
	// of a ButlerLogBundle.
	MaxButlerLogBundleSize = 10 * 1024 * 1024

	// MaxLogEntryDataSize is the maximum size, in bytes, of the data section of
	// a single log entry.
	MaxLogEntryDataSize = 10 * 1024 * 1024

	// MaxDatagramSize is the maximum size, in bytes, of datagram data.
	MaxDatagramSize int = MaxLogEntryDataSize
)
View Source 
const (
	// StreamNameSep is the separator rune for stream name tokens.
	StreamNameSep = '/'
	// StreamNameSepStr is a string containing a single rune, StreamNameSep.
	StreamNameSepStr = string(StreamNameSep)

	// StreamPathSep is the separator rune between a stream prefix and its
	// name.
	StreamPathSep = '+'
	// StreamPathSepStr is a string containing a single rune, StreamPathSep.
	StreamPathSepStr = string(StreamPathSep)

	// MaxStreamNameLength is the maximum size, in bytes, of a StreamName. Since
	// stream names must be valid ASCII, this is also the maximum string length.
	MaxStreamNameLength = 4096
)
View Source 
const (
	// PrefixSecretLength is the size, in bytes, of the stream secret.
	//
	// This value was chosen such that it is:
	// - Sufficiently large to avoid collisions.
	// - Can be expressed as a Base64 string without ugly padding.
	PrefixSecretLength = 36

	// OpNonceLength is the exact length that an OpNonce must be, if supplied.
	OpNonceLength = 32
)
View Source 
const (
	// MaxTagKeySize is the maximum number of bytes allowed in a tag's key
	// parameter.
	MaxTagKeySize = 64

	// MaxTagValueSize is the maximum number of bytes allowed in a tag's value
	// parameter.
	MaxTagValueSize = 4096
)
View Source 
const (
	// ContentTypeText is the default stream content type for text streams.
	ContentTypeText ContentType = "text/plain; charset=utf-8"
	// ContentTypeBinary is a stream content type for binary streams.
	ContentTypeBinary = "application/octet-stream"

	// ContentTypeLogdogDatagram is a content type for size-prefixed datagram
	// frame stream.
	ContentTypeLogdogDatagram = "application/x-logdog-datagram"
	// ContentTypeLogdogLog is a LogDog log stream.
	ContentTypeLogdogLog = "application/x-logdog-logs"
	// ContentTypeLogdogIndex is a LogDog log index.
	ContentTypeLogdogIndex = "application/x-logdog-log-index"
)

Variables

This section is empty.

Functions

func Construct 

func Construct(parts ...string) string

Construct builds a path string from a series of individual path components. Any leading and trailing separators will be stripped from the components.

The result value will be a valid StreamName if all of the parts are valid StreamName strings. Likewise, it may be a valid StreamPath if StreamPathSep is one of the parts.

func ValidateTag 

func ValidateTag(k, v string) error

ValidateTag returns an error if a tag contains a nonconfirming value.

Types

type ContentType 

type ContentType string

ContentType is a HTTP Content-Type value.

type MessageIndex 

type MessageIndex int64

MessageIndex is a prefix or stream message index type.

type PrefixSecret 

type PrefixSecret []byte

PrefixSecret is the prefix secret value. It is used to assert ownership of a prefix space.

The Prefix secret is generated by the Coordinator at prefix registration, and is included by the Butler to prove that it is the entity that registered the stream. The secret is asserted by microservices and the Coordinator during Butler-initiated stream operations.

func NewPrefixSecret 

func NewPrefixSecret() (PrefixSecret, error)

NewPrefixSecret generates a new, default-length secret parameter.

func (PrefixSecret) Validate 

func (s PrefixSecret) Validate() error

Validate confirms that this prefix secret is conformant.

Note that this does not scan the byte contents of the secret for any security-related parameters.

type StreamAddr 

type StreamAddr struct {
	// Host is the LogDog host.
	Host string `json:"host,omitempty"`

	// Project is the LUCI project name that this log belongs to.
	Project string `json:"project,omitempty"`

	// Path is the LogDog stream path.
	Path StreamPath `json:"path,omitempty"`
}

StreamAddr is a fully-qualified LogDog stream address.

func ParseURL 

func ParseURL(v string) (*StreamAddr, error)

ParseURL parses a LogDog URL into a Stream. If the URL is malformed, or if the host, project, or path is invalid, an error will be returned.

A LogDog URL has the form: logdog://<host>/<project>/<prefix>/+/<name>

func (*StreamAddr) IsZero 

func (s *StreamAddr) IsZero() bool

IsZero returns true iff all fields are empty.

func (*StreamAddr) Set 

func (s *StreamAddr) Set(v string) error

Set implements flag.Value

func (*StreamAddr) String 

func (s *StreamAddr) String() string

String returns a string representation of this address.

func (*StreamAddr) URL 

func (s *StreamAddr) URL() *url.URL

URL returns a LogDog URL that represents this Stream.

func (*StreamAddr) Validate 

func (s *StreamAddr) Validate() error

Validate returns an error if the supplied StreamAddr is not valid.

type StreamName 

type StreamName string

StreamName is a structured stream name.

A valid stream name is composed of segments internally separated by a StreamNameSep (/).

Each segment: - Consists of the following character types:

  • Alphanumeric characters [a-zA-Z0-9]
  • Colon (:)
  • Underscore (_)
  • Hyphen (-)
  • Period (.)

- Must begin with an alphanumeric character.

func MakeStreamName 

func MakeStreamName(fill string, s ...string) (StreamName, error)

MakeStreamName constructs a new stream name from its segments.

This method is guaranteed to return a valid stream name. In order to ensure that the arbitrary input can meet this standard, the following transformations will be applied as needed:

  • If the segment doesn't begin with an alphanumeric character, the fill string will be prepended.
  • Any character disallowed in the segment will be replaced with an underscore. This includes segment separators within a segment string.

An empty string can be passed for "fill" to just error if a replacement is needed.

func (StreamName) AsNamespace 

func (s StreamName) AsNamespace() StreamName

AsNamespace returns this streamname in namespace form.

As such, the returned value may always be directly concatenated with another StreamName (i.e. with `+`) to form a valid stream name (assuming that both StreamNames are, in fact, valid in the first place).

For example: 

"".AsNamespace() -> ""
"foo".AsNamespace() -> "foo/"
"bar/".AsNamespace() -> "bar/"

func (StreamName) AsPathPrefix 

func (s StreamName) AsPathPrefix(name StreamName) StreamPath

AsPathPrefix uses s as the prefix component of a StreamPath and constructs the remainder of the path with the supplied name.

If name is empty, the resulting path will end in the path separator. For example, if s is "foo/bar" and name is "", the path will be "foo/bar/+".

If both s and name are valid StreamNames, this will construct a valid StreamPath. If s is a valid StreamName and name is empty, this will construct a valid partial StreamPath.

func (StreamName) Concat 

func (s StreamName) Concat(o ...StreamName) StreamName

Concat constructs a StreamName by concatenating several StreamName components together.

func (StreamName) Join 

func (s StreamName) Join(o StreamName) StreamPath

Join concatenates a stream name onto the end of the current name, separating it with a separator character.

func (StreamName) MarshalJSON 

func (s StreamName) MarshalJSON() ([]byte, error)

MarshalJSON implements json.Marshaler.

func (StreamName) Namespaces 

func (s StreamName) Namespaces() (ret []StreamName)

Namespaces returns a slice of all the namespaces this StreamName is within.

For example: 

"a/b/c".Namespaces() ->
   "a/b/"
   "a/"
   ""

func (StreamName) SegmentCount 

func (s StreamName) SegmentCount() int

SegmentCount returns the total number of segments in the StreamName.

func (StreamName) Segments 

func (s StreamName) Segments() []string

Segments returns the individual StreamName segments by splitting splitting the StreamName with StreamNameSep.

func (*StreamName) Set 

func (s *StreamName) Set(value string) error

Set implements flag.Value.

func (StreamName) Split 

func (s StreamName) Split() (prefix, last StreamName)

Split splits a StreamName on its last path element, into a prefix (everything before that element) and the last element.

Split assumes that s is a valid stream name.

If there is only one element in the stream name, prefix will be empty.

For example:

  • Split("foo/bar/baz") ("foo/bar", "baz")
  • Split("foo") ("", "foo")
  • Split("") ("", "")

func (*StreamName) String 

func (s *StreamName) String() string

String implements flag.String.

func (StreamName) Trim 

func (s StreamName) Trim() StreamName

Trim trims separator characters from the beginning and end of a StreamName.

While such a StreamName is not Valid, this method helps correct small user input errors.

func (*StreamName) UnmarshalJSON 

func (s *StreamName) UnmarshalJSON(data []byte) error

UnmarshalJSON implements json.Unmarshaler.

func (StreamName) Validate 

func (s StreamName) Validate() error

Validate tests whether the stream name is valid.

type StreamNameSlice 

type StreamNameSlice []StreamName

StreamNameSlice is a slice of StreamName entries. It implements sort.Interface.

func (StreamNameSlice) Len 

func (s StreamNameSlice) Len() int

func (StreamNameSlice) Less 

func (s StreamNameSlice) Less(i, j int) bool

func (StreamNameSlice) Swap 

func (s StreamNameSlice) Swap(i, j int)

type StreamPath 

type StreamPath string

A StreamPath consists of two StreamName, joined via a StreamPathSep (+) separator.

func (StreamPath) Append 

func (p StreamPath) Append(n string) StreamPath

Append returns a StreamPath consisting of the current StreamPath with the supplied StreamName appended to the end.

Append will return a valid StreamPath if p and n are both valid.

func (StreamPath) MarshalJSON 

func (p StreamPath) MarshalJSON() ([]byte, error)

MarshalJSON implements json.Marshaler.

func (StreamPath) SegmentCount 

func (p StreamPath) SegmentCount() int

SegmentCount returns the total number of segments in the StreamName.

func (StreamPath) Split 

func (p StreamPath) Split() (prefix StreamName, name StreamName)

Split splits a StreamPath into its prefix and name components.

If there is no divider present (e.g., foo/bar/baz), the result will parse as the stream prefix with an empty name component.

func (StreamPath) SplitLast 

func (p StreamPath) SplitLast() (StreamPath, string)

SplitLast splits the rightmost component from a StreamPath, returning the intermediate StreamPath.

If the path begins with a leading separator, it will be included in the leftmost token. Note that such a path is invalid.

If there are no components in the path, ("", p) will be returned.

func (StreamPath) SplitParts 

func (p StreamPath) SplitParts() (prefix StreamName, sep bool, name StreamName)

SplitParts splits a StreamPath into its prefix and name components.

If there is no separator present (e.g., foo/bar/baz), the result will parse as the stream prefix with an empty name component. If there is a separator present but no name component, separator will be returned as true with an empty name.

func (StreamPath) Trim 

func (p StreamPath) Trim() StreamPath

Trim trims separator characters from the beginning and end of a StreamPath.

While such a StreamPath is not Valid, this method helps correct small user input errors.

func (*StreamPath) UnmarshalJSON 

func (p *StreamPath) UnmarshalJSON(data []byte) error

UnmarshalJSON implements json.Unmarshaler.

func (StreamPath) Validate 

func (p StreamPath) Validate() error

Validate checks whether a StreamPath is valid. A valid stream path must have a valid prefix and name components.

func (StreamPath) ValidatePartial 

func (p StreamPath) ValidatePartial() error

ValidatePartial checks whether a partial StreamPath is valid. A partial stream path if appending additional components to it can form a fully-valid StreamPath.

Source Files

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