flate.Reader 1000
// The actual read interface needed by NewReader.
// If the passed in io.Reader does not also have ReadByte,
// the NewReader will introduce its own buffering.
type Reader interface {
.
.
}
jpeg.Reader 999
// Deprecated: Reader is not used by the image/jpeg package and should
// not be used by others. It is kept for compatibility.
type Reader interface {
.
.
}
io.Reader 766
// Reader is the interface that wraps the basic Read method.
//
// Read reads up to len(p) bytes into p. It returns the number of bytes
// read (0 <= n <= len(p)) and any error encountered. Even if Read
// returns n < len(p), it may use all of p as scratch space during the call.
// If some data is available but not len(p) bytes, Read conventionally
// returns what is available instead of waiting for more.
//
// When Read encounters an error or end-of-file condition after
// successfully reading n > 0 bytes, it returns the number of
// bytes read. It may return the (non-nil) error from the same call
// or return the error (and n == 0) from a subsequent call.
// An instance of this general case is that a Reader returning
// a non-zero number of bytes at the end of the input stream may
// return either err == EOF or err == nil. The next Read should
// return 0, EOF.
//
// Callers should always process the n > 0 bytes returned before
// considering the error err. Doing so correctly handles I/O errors
// that happen after reading some bytes and also both of the
// allowed EOF behaviors.
//
// Implementations of Read are discouraged from returning a
// zero byte count with a nil error, except when len(p) == 0.
// Callers should treat a return of 0 and nil as indicating that
// nothing happened; in particular it does not indicate EOF.
//
// Implementations must not retain p.
type Reader interface {
Read(p []byte) (n int, err error)
}
io.ReaderAt 685
// ReaderAt is the interface that wraps the basic ReadAt method.
//
// ReadAt reads len(p) bytes into p starting at offset off in the
// underlying input source. It returns the number of bytes
// read (0 <= n <= len(p)) and any error encountered.
//
// When ReadAt returns n < len(p), it returns a non-nil error
// explaining why more bytes were not returned. In this respect,
// ReadAt is stricter than Read.
//
// Even if ReadAt returns n < len(p), it may use all of p as scratch
// space during the call. If some data is available but not len(p) bytes,
// ReadAt blocks until either all the data is available or an error occurs.
// In this respect ReadAt is different from Read.
//
// If the n = len(p) bytes returned by ReadAt are at the end of the
// input source, ReadAt may return either err == EOF or err == nil.
//
// If ReadAt is reading from an input source with a seek offset,
// ReadAt should not affect nor be affected by the underlying
// seek offset.
//
// Clients of ReadAt can execute parallel ReadAt calls on the
// same input source.
//
// Implementations must not retain p.
type ReaderAt interface {
ReadAt(p []byte, off int64) (n int, err error)
}
io.ReadCloser 544
// ReadCloser is the interface that groups the basic Read and Close methods.
type ReadCloser interface {
}
io.ReadSeeker 544
// ReadSeeker is the interface that groups the basic Read and Seek methods.
type ReadSeeker interface {
}
io.ReadWriter 544
// ReadWriter is the interface that groups the basic Read and Write methods.
type ReadWriter interface {
}
io.RuneReader 534
// RuneReader is the interface that wraps the ReadRune method.
//
// ReadRune reads a single encoded Unicode character
// and returns the rune and its size in bytes. If no character is
// available, err will be set.
type RuneReader interface {
ReadRune() (r rune, size int, err error)
}
io.ByteReader 534
// ByteReader is the interface that wraps the ReadByte method.
//
// ReadByte reads and returns the next byte from the input or
// any error encountered. If ReadByte returns an error, no input
// byte was consumed, and the returned byte value is undefined.
//
// ReadByte provides an efficient interface for byte-at-time
// processing. A Reader that does not implement ByteReader
// can be wrapped using bufio.NewReader to add this method.
type ByteReader interface {
ReadByte() (byte, error)
}
io.ReaderFrom 533
// ReaderFrom is the interface that wraps the ReadFrom method.
//
// ReadFrom reads data from r until EOF or error.
// The return value n is the number of bytes read.
// Any error except EOF encountered during the read is also returned.
//
// The Copy function uses ReaderFrom if available.
type ReaderFrom interface {
ReadFrom(r Reader) (n int64, err error)
}
xml.TokenReader 395
// A TokenReader is anything that can decode a stream of XML tokens, including a
// Decoder.
//
// When Token encounters an error or end-of-file condition after successfully
// reading a token, it returns the token. It may return the (non-nil) error from
// the same call or return the error (and a nil token) from a subsequent call.
// An instance of this general case is that a TokenReader returning a non-nil
// token at the end of the token stream may return either io.EOF or a nil error.
// The next Read should return nil, io.EOF.
//
// Implementations of Token are discouraged from returning a nil token with a
// nil error. Callers should treat a return of nil, nil as indicating that
// nothing happened; in particular it does not indicate EOF.
type TokenReader interface {
Token() (Token, error)
}
io.ReadSeekCloser 352
// ReadSeekCloser is the interface that groups the basic Read, Seek and Close
// methods.
type ReadSeekCloser interface {
}
io.ReadWriteSeeker 351
// ReadWriteSeeker is the interface that groups the basic Read, Write and Seek methods.
type ReadWriteSeeker interface {
}
io.ReadWriteCloser 351
// ReadWriteCloser is the interface that groups the basic Read, Write and Close methods.
type ReadWriteCloser interface {
}
io.RuneScanner 322
// RuneScanner is the interface that adds the UnreadRune method to the
// basic ReadRune method.
//
// UnreadRune causes the next call to ReadRune to return the last rune read.
// If the last operation was not a successful call to ReadRune, UnreadRune may
// return an error, unread the last rune read (or the rune prior to the
// last-unread rune), or (in implementations that support the Seeker interface)
// seek to the start of the rune before the current offset.
type RuneScanner interface {
UnreadRune() error
}
io.ByteScanner 322
// ByteScanner is the interface that adds the UnreadByte method to the
// basic ReadByte method.
//
// UnreadByte causes the next call to ReadByte to return the last byte read.
// If the last operation was not a successful call to ReadByte, UnreadByte may
// return an error, unread the last byte read (or the byte prior to the
// last-unread byte), or (in implementations that support the Seeker interface)
// seek to one byte before the current offset.
type ByteScanner interface {
UnreadByte() error
}
blake2b.XOF 303
// XOF defines the interface to hash functions that
// support arbitrary-length output.
type XOF interface {
// Write absorbs more data into the hash's state. It panics if called
// after Read.
.
// Read reads more output from the hash. It returns io.EOF if the limit
// has been reached.
.
// Clone returns a copy of the XOF in its current state.
Clone() XOF
// Reset resets the XOF to its initial state.
Reset()
}
blake2s.XOF 303
// XOF defines the interface to hash functions that
// support arbitrary-length output.
type XOF interface {
// Write absorbs more data into the hash's state. It panics if called
// after Read.
.
// Read reads more output from the hash. It returns io.EOF if the limit
// has been reached.
.
// Clone returns a copy of the XOF in its current state.
Clone() XOF
// Reset resets the XOF to its initial state.
Reset()
}
sha3.ShakeHash 303
// ShakeHash defines the interface to hash functions that
// support arbitrary-length output.
type ShakeHash interface {
// Write absorbs more data into the hash's state. It panics if input is
// written to it after output has been read from it.
.
// Read reads more output from the hash; reading affects the hash's
// state. (ShakeHash.Read is thus very different from Hash.Sum)
// It never returns an error.
.
// Clone returns a copy of the ShakeHash in its current state.
Clone() ShakeHash
// Reset resets the ShakeHash to its initial state.
Reset()
}
http.File 227
// A File is returned by a FileSystem's Open method and can be
// served by the FileServer implementation.
//
// The methods should behave the same as those on an *os.File.
type File interface {
.
.
.
Readdir(count int) ([]fs.FileInfo, error)
Stat() (fs.FileInfo, error)
}
multipart.File 222
// File is an interface to access the file part of a multipart message.
// Its contents may be either stored in memory or on disk.
// If stored on disk, the File's underlying concrete type will be an *os.File.
type File interface {
.
.
.
.
}
fs.ReadDirFS 222
// ReadDirFS is the interface implemented by a file system
// that provides an optimized implementation of ReadDir.
type ReadDirFS interface {
// ReadDir reads the named directory
// and returns a list of directory entries sorted by filename.
ReadDir(name string) ([]DirEntry, error)
}
fs.ReadDirFile 212
// A ReadDirFile is a directory file whose entries can be read with the ReadDir method.
// Every directory file should implement this interface.
// (It is permissible for any file to implement this interface,
// but if so ReadDir should return an error for non-directories.)
type ReadDirFile interface {
// ReadDir reads the contents of the directory and returns
// a slice of up to n DirEntry values in directory order.
// Subsequent calls on the same file will yield further DirEntry values.
//
// If n > 0, ReadDir returns at most n DirEntry structures.
// In this case, if ReadDir returns an empty slice, it will return
// a non-nil error explaining why.
// At the end of a directory, the error is io.EOF.
// (ReadDir must return io.EOF itself, not an error wrapping io.EOF.)
//
// If n <= 0, ReadDir returns all the DirEntry values from the directory
// in a single slice. In this case, if ReadDir succeeds (reads all the way
// to the end of the directory), it returns the slice and a nil error.
// If it encounters an error before the end of the directory,
// ReadDir returns the DirEntry list read until that point and a non-nil error.
ReadDir(n int) ([]DirEntry, error)
}
fs.ReadFileFS 205
// ReadFileFS is the interface implemented by a file system
// that provides an optimized implementation of ReadFile.
type ReadFileFS interface {
// ReadFile reads the named file and returns its contents.
// A successful call returns a nil error, not io.EOF.
// (Because ReadFile reads the whole file, the expected EOF
// from the final Read is not treated as an error to be reported.)
//
// The caller is permitted to modify the returned byte slice.
// This method should return a copy of the underlying data.
ReadFile(name string) ([]byte, error)
}
http.ResponseWriter 138
// A ResponseWriter interface is used by an HTTP handler to
// construct an HTTP response.
//
// A ResponseWriter may not be used after the Handler.ServeHTTP method
// has returned.
type ResponseWriter interface {
// Header returns the header map that will be sent by
// WriteHeader. The Header map also is the mechanism with which
// Handlers can set HTTP trailers.
//
// Changing the header map after a call to WriteHeader (or
// Write) has no effect unless the HTTP status code was of the
// 1xx class or the modified headers are trailers.
//
// There are two ways to set Trailers. The preferred way is to
// predeclare in the headers which trailers you will later
// send by setting the "Trailer" header to the names of the
// trailer keys which will come later. In this case, those
// keys of the Header map are treated as if they were
// trailers. See the example. The second way, for trailer
// keys not known to the Handler until after the first Write,
// is to prefix the Header map keys with the TrailerPrefix
// constant value. See TrailerPrefix.
//
// To suppress automatic response headers (such as "Date"), set
// their value to nil.
Header() Header
// Write writes the data to the connection as part of an HTTP reply.
//
// If WriteHeader has not yet been called, Write calls
// WriteHeader(http.StatusOK) before writing the data. If the Header
// does not contain a Content-Type line, Write adds a Content-Type set
// to the result of passing the initial 512 bytes of written data to
// DetectContentType. Additionally, if the total size of all written
// data is under a few KB and there are no Flush calls, the
// Content-Length header is added automatically.
//
// Depending on the HTTP protocol version and the client, calling
// Write or WriteHeader may prevent future reads on the
// Request.Body. For HTTP/1.x requests, handlers should read any
// needed request body data before writing the response. Once the
// headers have been flushed (due to either an explicit Flusher.Flush
// call or writing enough data to trigger a flush), the request body
// may be unavailable. For HTTP/2 requests, the Go HTTP server permits
// handlers to continue to read the request body while concurrently
// writing the response. However, such behavior may not be supported
// by all HTTP/2 clients. Handlers should read before writing if
// possible to maximize compatibility.
Write([]byte) (int, error)
// WriteHeader sends an HTTP response header with the provided
// status code.
//
// If WriteHeader is not called explicitly, the first call to Write
// will trigger an implicit WriteHeader(http.StatusOK).
// Thus explicit calls to WriteHeader are mainly used to
// send error codes or 1xx informational responses.
//
// The provided code must be a valid HTTP 1xx-5xx status code.
// Any number of 1xx headers may be written, followed by at most
// one 2xx-5xx header. 1xx headers are sent immediately, but 2xx-5xx
// headers may be buffered. Use the Flusher interface to send
// buffered data. The header map is cleared when 2xx-5xx headers are
// sent, but not with 1xx headers.
//
// The server will automatically send a 100 (Continue) header
// on the first read from the request body if the request has
// an "Expect: 100-continue" header.
WriteHeader(statusCode int)
}
syscall.RawConn 109
// A RawConn is a raw network connection.
type RawConn interface {
// Control invokes f on the underlying connection's file
// descriptor or handle.
// The file descriptor fd is guaranteed to remain valid while
// f executes but not after f returns.
Control(f func(fd uintptr)) error
// Read invokes f on the underlying connection's file
// descriptor or handle; f is expected to try to read from the
// file descriptor.
// If f returns true, Read returns. Otherwise Read blocks
// waiting for the connection to be ready for reading and
// tries again repeatedly.
// The file descriptor is guaranteed to remain valid while f
// executes but not after f returns.
Read(f func(fd uintptr) (done bool)) error
// Write is like Read but for writing.
Write(f func(fd uintptr) (done bool)) error
}
fs.File 109
// A File provides access to a single file.
// The File interface is the minimum implementation required of the file.
// Directory files should also implement ReadDirFile.
// A file may implement io.ReaderAt or io.Seeker as optimizations.
type File interface {
Stat() (FileInfo, error)
Read([]byte) (int, error)
Close() error
}
pack.FileLike 84
// FileLike abstracts the few methods we need, so we can test without needing real files.
type FileLike interface {
Name() string
Stat() (fs.FileInfo, error)
Read([]byte) (int, error)
Close() error
}
fmt.ScanState 71
// ScanState represents the scanner state passed to custom scanners.
// Scanners may do rune-at-a-time scanning or ask the ScanState
// to discover the next space-delimited token.
type ScanState interface {
// ReadRune reads the next rune (Unicode code point) from the input.
// If invoked during Scanln, Fscanln, or Sscanln, ReadRune() will
// return EOF after returning the first '\n' or when reading beyond
// the specified width.
ReadRune() (r rune, size int, err error)
// UnreadRune causes the next call to ReadRune to return the same rune.
UnreadRune() error
// SkipSpace skips space in the input. Newlines are treated appropriately
// for the operation being performed; see the package documentation
// for more information.
SkipSpace()
// Token skips space in the input if skipSpace is true, then returns the
// run of Unicode code points c satisfying f(c). If f is nil,
// !unicode.IsSpace(c) is used; that is, the token will hold non-space
// characters. Newlines are treated appropriately for the operation being
// performed; see the package documentation for more information.
// The returned slice points to shared data that may be overwritten
// by the next call to Token, a call to a Scan function using the ScanState
// as input, or when the calling Scan method returns.
Token(skipSpace bool, f func(rune) bool) (token []byte, err error)
// Width returns the value of the width option and whether it has been set.
// The unit is Unicode code points.
Width() (wid int, ok bool)
// Because ReadRune is implemented by the interface, Read should never be
// called by the scanning routines and a valid implementation of
// ScanState may choose always to return an error from Read.
Read(buf []byte) (n int, err error)
}
cipher.AEAD 69
// AEAD is a cipher mode providing authenticated encryption with associated
// data. For a description of the methodology, see
// https://en.wikipedia.org/wiki/Authenticated_encryption.
type AEAD interface {
// NonceSize returns the size of the nonce that must be passed to Seal
// and Open.
NonceSize() int
// Overhead returns the maximum difference between the lengths of a
// plaintext and its ciphertext.
Overhead() int
// Seal encrypts and authenticates plaintext, authenticates the
// additional data and appends the result to dst, returning the updated
// slice. The nonce must be NonceSize() bytes long and unique for all
// time, for a given key.
//
// To reuse plaintext's storage for the encrypted output, use plaintext[:0]
// as dst. Otherwise, the remaining capacity of dst must not overlap plaintext.
Seal(dst []byte, nonce []byte, plaintext []byte, additionalData []byte) []byte
// Open decrypts and authenticates ciphertext, authenticates the
// additional data and, if successful, appends the resulting plaintext
// to dst, returning the updated slice. The nonce must be NonceSize()
// bytes long and both it and the additional data must match the
// value passed to Seal.
//
// To reuse ciphertext's storage for the decrypted output, use ciphertext[:0]
// as dst. Otherwise, the remaining capacity of dst must not overlap plaintext.
//
// Even if the function fails, the contents of dst, up to its capacity,
// may be overwritten.
Open(dst []byte, nonce []byte, ciphertext []byte, additionalData []byte) ([]byte, error)
}
rpc.ServerCodec 58
// A ServerCodec implements reading of RPC requests and writing of
// RPC responses for the server side of an RPC session.
// The server calls ReadRequestHeader and ReadRequestBody in pairs
// to read requests from the connection, and it calls WriteResponse to
// write a response back. The server calls Close when finished with the
// connection. ReadRequestBody may be called with a nil
// argument to force the body of the request to be read and discarded.
// See NewClient's comment for information about concurrent access.
type ServerCodec interface {
ReadRequestHeader(*Request) error
ReadRequestBody(any) error
WriteResponse(*Response, any) error
// Close can be called multiple times and must be idempotent.
Close() error
}
rpc.ClientCodec 54
// A ClientCodec implements writing of RPC requests and
// reading of RPC responses for the client side of an RPC session.
// The client calls WriteRequest to write a request to the connection
// and calls ReadResponseHeader and ReadResponseBody in pairs
// to read responses. The client calls Close when finished with the
// connection. ReadResponseBody may be called with a nil
// argument to force the body of the response to be read and then
// discarded.
// See NewClient's comment for information about concurrent access.
type ClientCodec interface {
WriteRequest(*Request, any) error
ReadResponseHeader(*Response) error
ReadResponseBody(any) error
Close() error
}