mirror of
https://github.com/go-gitea/gitea
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e7d7dcb090
* add redis queue * finished indexer redis queue * add redis vendor * fix vet * Update docs/content/doc/advanced/config-cheat-sheet.en-us.md Co-Authored-By: lunny <xiaolunwen@gmail.com> * switch to go mod * Update required changes for new logging func signatures
291 lines
5.5 KiB
Go
291 lines
5.5 KiB
Go
package proto
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import (
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"bufio"
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"fmt"
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"io"
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"strconv"
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"github.com/go-redis/redis/internal/util"
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)
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const (
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ErrorReply = '-'
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StatusReply = '+'
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IntReply = ':'
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StringReply = '$'
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ArrayReply = '*'
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)
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//------------------------------------------------------------------------------
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const Nil = RedisError("redis: nil")
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type RedisError string
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func (e RedisError) Error() string { return string(e) }
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//------------------------------------------------------------------------------
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type MultiBulkParse func(*Reader, int64) (interface{}, error)
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type Reader struct {
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rd *bufio.Reader
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_buf []byte
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}
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func NewReader(rd io.Reader) *Reader {
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return &Reader{
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rd: bufio.NewReader(rd),
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_buf: make([]byte, 64),
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}
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}
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func (r *Reader) Reset(rd io.Reader) {
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r.rd.Reset(rd)
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}
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func (r *Reader) ReadLine() ([]byte, error) {
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line, isPrefix, err := r.rd.ReadLine()
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if err != nil {
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return nil, err
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}
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if isPrefix {
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return nil, bufio.ErrBufferFull
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}
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if len(line) == 0 {
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return nil, fmt.Errorf("redis: reply is empty")
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}
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if isNilReply(line) {
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return nil, Nil
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}
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return line, nil
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}
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func (r *Reader) ReadReply(m MultiBulkParse) (interface{}, error) {
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line, err := r.ReadLine()
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if err != nil {
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return nil, err
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}
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switch line[0] {
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case ErrorReply:
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return nil, ParseErrorReply(line)
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case StatusReply:
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return string(line[1:]), nil
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case IntReply:
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return util.ParseInt(line[1:], 10, 64)
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case StringReply:
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return r.readStringReply(line)
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case ArrayReply:
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n, err := parseArrayLen(line)
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if err != nil {
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return nil, err
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}
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return m(r, n)
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}
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return nil, fmt.Errorf("redis: can't parse %.100q", line)
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}
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func (r *Reader) ReadIntReply() (int64, error) {
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line, err := r.ReadLine()
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if err != nil {
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return 0, err
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}
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switch line[0] {
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case ErrorReply:
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return 0, ParseErrorReply(line)
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case IntReply:
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return util.ParseInt(line[1:], 10, 64)
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default:
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return 0, fmt.Errorf("redis: can't parse int reply: %.100q", line)
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}
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}
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func (r *Reader) ReadString() (string, error) {
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line, err := r.ReadLine()
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if err != nil {
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return "", err
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}
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switch line[0] {
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case ErrorReply:
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return "", ParseErrorReply(line)
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case StringReply:
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return r.readStringReply(line)
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case StatusReply:
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return string(line[1:]), nil
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case IntReply:
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return string(line[1:]), nil
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default:
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return "", fmt.Errorf("redis: can't parse reply=%.100q reading string", line)
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}
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}
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func (r *Reader) readStringReply(line []byte) (string, error) {
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if isNilReply(line) {
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return "", Nil
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}
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replyLen, err := strconv.Atoi(string(line[1:]))
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if err != nil {
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return "", err
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}
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b := make([]byte, replyLen+2)
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_, err = io.ReadFull(r.rd, b)
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if err != nil {
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return "", err
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}
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return util.BytesToString(b[:replyLen]), nil
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}
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func (r *Reader) ReadArrayReply(m MultiBulkParse) (interface{}, error) {
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line, err := r.ReadLine()
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if err != nil {
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return nil, err
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}
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switch line[0] {
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case ErrorReply:
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return nil, ParseErrorReply(line)
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case ArrayReply:
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n, err := parseArrayLen(line)
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if err != nil {
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return nil, err
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}
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return m(r, n)
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default:
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return nil, fmt.Errorf("redis: can't parse array reply: %.100q", line)
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}
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}
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func (r *Reader) ReadArrayLen() (int64, error) {
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line, err := r.ReadLine()
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if err != nil {
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return 0, err
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}
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switch line[0] {
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case ErrorReply:
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return 0, ParseErrorReply(line)
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case ArrayReply:
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return parseArrayLen(line)
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default:
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return 0, fmt.Errorf("redis: can't parse array reply: %.100q", line)
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}
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}
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func (r *Reader) ReadScanReply() ([]string, uint64, error) {
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n, err := r.ReadArrayLen()
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if err != nil {
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return nil, 0, err
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}
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if n != 2 {
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return nil, 0, fmt.Errorf("redis: got %d elements in scan reply, expected 2", n)
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}
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cursor, err := r.ReadUint()
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if err != nil {
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return nil, 0, err
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}
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n, err = r.ReadArrayLen()
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if err != nil {
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return nil, 0, err
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}
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keys := make([]string, n)
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for i := int64(0); i < n; i++ {
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key, err := r.ReadString()
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if err != nil {
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return nil, 0, err
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}
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keys[i] = key
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}
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return keys, cursor, err
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}
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func (r *Reader) ReadInt() (int64, error) {
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b, err := r.readTmpBytesReply()
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if err != nil {
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return 0, err
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}
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return util.ParseInt(b, 10, 64)
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}
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func (r *Reader) ReadUint() (uint64, error) {
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b, err := r.readTmpBytesReply()
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if err != nil {
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return 0, err
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}
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return util.ParseUint(b, 10, 64)
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}
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func (r *Reader) ReadFloatReply() (float64, error) {
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b, err := r.readTmpBytesReply()
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if err != nil {
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return 0, err
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}
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return util.ParseFloat(b, 64)
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}
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func (r *Reader) readTmpBytesReply() ([]byte, error) {
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line, err := r.ReadLine()
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if err != nil {
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return nil, err
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}
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switch line[0] {
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case ErrorReply:
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return nil, ParseErrorReply(line)
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case StringReply:
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return r._readTmpBytesReply(line)
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case StatusReply:
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return line[1:], nil
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default:
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return nil, fmt.Errorf("redis: can't parse string reply: %.100q", line)
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}
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}
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func (r *Reader) _readTmpBytesReply(line []byte) ([]byte, error) {
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if isNilReply(line) {
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return nil, Nil
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}
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replyLen, err := strconv.Atoi(string(line[1:]))
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if err != nil {
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return nil, err
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}
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buf := r.buf(replyLen + 2)
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_, err = io.ReadFull(r.rd, buf)
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if err != nil {
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return nil, err
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}
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return buf[:replyLen], nil
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}
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func (r *Reader) buf(n int) []byte {
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if d := n - cap(r._buf); d > 0 {
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r._buf = append(r._buf, make([]byte, d)...)
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}
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return r._buf[:n]
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}
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func isNilReply(b []byte) bool {
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return len(b) == 3 &&
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(b[0] == StringReply || b[0] == ArrayReply) &&
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b[1] == '-' && b[2] == '1'
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}
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func ParseErrorReply(line []byte) error {
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return RedisError(string(line[1:]))
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}
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func parseArrayLen(line []byte) (int64, error) {
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if isNilReply(line) {
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return 0, Nil
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}
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return util.ParseInt(line[1:], 10, 64)
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}
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