Mirroristas/etcd
2
0
Fork 0
mirror of https://github.com/etcd-io/etcd.git synced 2024-09-27 06:25:44 +00:00
Code Issues Packages Projects Releases Wiki Activity

Godep: add cmux dependency

Browse Source
This commit is contained in:
Xiang Li 2016-03-21 14:33:37 -07:00
parent d3809abe42
commit 7c3432a79f
10 changed files with 886 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Godeps/Godeps.json generated
View File

@ -31,6 +31,10 @@
"ImportPath": "github.com/cheggaaa/pb",
"Rev": "da1f27ad1d9509b16f65f52fd9d8138b0f2dc7b2"
},
{
"ImportPath": "github.com/cockroachdb/cmux",
"Rev": "112f0506e7743d64a6eb8fedbcff13d9979bbf92"
},
{
"ImportPath": "github.com/codegangsta/cli",
"Comment": "1.2.0-183-gb5232bb",

24
Godeps/_workspace/src/github.com/cockroachdb/cmux/.gitignore generated vendored Normal file
View File

@ -0,0 +1,24 @@
# Compiled Object files, Static and Dynamic libs (Shared Objects)
*.o
*.a
*.so
# Folders
_obj
_test
# Architecture specific extensions/prefixes
*.[568vq]
[568vq].out
*.cgo1.go
*.cgo2.c
_cgo_defun.c
_cgo_gotypes.go
_cgo_export.*
_testmain.go
*.exe
*.test
*.prof

22
Godeps/_workspace/src/github.com/cockroachdb/cmux/.travis.yml generated vendored Normal file
View File

@ -0,0 +1,22 @@
language: go
go:
- 1.3
- 1.4
- 1.5
- 1.6
gobuild_args: -race
before_install:
- go get -u github.com/golang/lint/golint
- if [[ $TRAVIS_GO_VERSION == 1.5* ]]; then go get -u github.com/kisielk/errcheck; fi
- go get -u golang.org/x/tools/cmd/vet
before_script:
- '! gofmt -s -l . | read'
- golint ./...
- echo $TRAVIS_GO_VERSION
- if [[ $TRAVIS_GO_VERSION == 1.5* ]]; then errcheck ./...; fi
- go vet .
- go tool vet --shadow .

202
Godeps/_workspace/src/github.com/cockroachdb/cmux/LICENSE generated vendored Normal file
View File

@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

65
Godeps/_workspace/src/github.com/cockroachdb/cmux/README.md generated vendored Normal file
View File

@ -0,0 +1,65 @@
# cmux: Connection Mux [![Build Status](https://travis-ci.org/cockroachdb/cmux.svg?branch=master)](https://travis-ci.org/cockroachdb/cmux) [![GoDoc](https://godoc.org/github.com/cockroachdb/cmux?status.svg)](https://godoc.org/github.com/cockroachdb/cmux)
cmux is a generic Go library to multiplex connections based on their payload.
Using cmux, you can serve gRPC, SSH, HTTPS, HTTP, Go RPC, and pretty much any
other protocol on the same TCP listener.
## How-To
Simply create your main listener, create a cmux for that listener,
and then match connections:
```go
// Create the main listener.
l, err := net.Listen("tcp", ":23456")
if err != nil {
log.Fatal(err)
}
// Create a cmux.
m := cmux.New(l)
// Match connections in order:
// First grpc, then HTTP, and otherwise Go RPC/TCP.
grpcL := m.Match(cmux.HTTP2HeaderField("content-type", "application/grpc"))
httpL := m.Match(cmux.HTTP1Fast())
trpcL := m.Match(cmux.Any()) // Any means anything that is not yet matched.
// Create your protocol servers.
grpcS := grpc.NewServer()
grpchello.RegisterGreeterServer(grpcs, &server{})
httpS := &http.Server{
Handler: &helloHTTP1Handler{},
}
trpcS := rpc.NewServer()
s.Register(&ExampleRPCRcvr{})
// Use the muxed listeners for your servers.
go grpcS.Serve(grpcL)
go httpS.Serve(httpL)
go trpcS.Accept(trpcL)
// Start serving!
m.Serve()
```
There are [more examples on GoDoc](https://godoc.org/github.com/cockroachdb/cmux#pkg-examples).
## Performance
Since we are only matching the very first bytes of a connection, the
performance overhead on long-lived connections (i.e., RPCs and pipelined HTTP
streams) is negligible.
## Limitations
* *TLS*: `net/http` uses a [type assertion](https://github.com/golang/go/issues/14221)
to identify TLS connections; since cmux's lookahead-implementing connection
wraps the underlying TLS connection, this type assertion fails. This means you
can serve HTTPS using cmux but `http.Request.TLS` will not be set in your
handlers. If you are able to wrap TLS around cmux, you can work around this
limitation. See https://github.com/cockroachdb/cockroach/commit/83caba2 for an
example of this approach.
* *Different Protocols on The Same Connection*: `cmux` matches the connection
when it's accepted. For example, one connection can be either gRPC or REST, but
not both. That is, we assume that a client connection is either used for gRPC
or REST.

35
Godeps/_workspace/src/github.com/cockroachdb/cmux/buffer.go generated vendored Normal file
View File

@ -0,0 +1,35 @@
package cmux
import (
"bytes"
"io"
)
// bufferedReader is an optimized implementation of io.Reader that behaves like
// ```
// io.MultiReader(bytes.NewReader(buffer.Bytes()), io.TeeReader(source, buffer))
// ```
// without allocating.
type bufferedReader struct {
source io.Reader
buffer *bytes.Buffer
bufferRead int
bufferSize int
}
func (s *bufferedReader) Read(p []byte) (int, error) {
// Functionality of bytes.Reader.
bn := copy(p, s.buffer.Bytes()[s.bufferRead:s.bufferSize])
s.bufferRead += bn
p = p[bn:]
// Funtionality of io.TeeReader.
sn, sErr := s.source.Read(p)
if sn > 0 {
if wn, wErr := s.buffer.Write(p[:sn]); wErr != nil {
return bn + wn, wErr
}
}
return bn + sn, sErr
}

210
Godeps/_workspace/src/github.com/cockroachdb/cmux/cmux.go generated vendored Normal file
View File

@ -0,0 +1,210 @@
package cmux
import (
"bytes"
"fmt"
"io"
"net"
"sync"
)
// Matcher matches a connection based on its content.
type Matcher func(io.Reader) bool
// ErrorHandler handles an error and returns whether
// the mux should continue serving the listener.
type ErrorHandler func(error) bool
var _ net.Error = ErrNotMatched{}
// ErrNotMatched is returned whenever a connection is not matched by any of
// the matchers registered in the multiplexer.
type ErrNotMatched struct {
c net.Conn
}
func (e ErrNotMatched) Error() string {
return fmt.Sprintf("mux: connection %v not matched by an matcher",
e.c.RemoteAddr())
}
// Temporary implements the net.Error interface.
func (e ErrNotMatched) Temporary() bool { return true }
// Timeout implements the net.Error interface.
func (e ErrNotMatched) Timeout() bool { return false }
type errListenerClosed string
func (e errListenerClosed) Error() string { return string(e) }
func (e errListenerClosed) Temporary() bool { return false }
func (e errListenerClosed) Timeout() bool { return false }
// ErrListenerClosed is returned from muxListener.Accept when the underlying
// listener is closed.
var ErrListenerClosed = errListenerClosed("mux: listener closed")
// New instantiates a new connection multiplexer.
func New(l net.Listener) CMux {
return &cMux{
root: l,
bufLen: 1024,
errh: func(_ error) bool { return true },
donec: make(chan struct{}),
}
}
// CMux is a multiplexer for network connections.
type CMux interface {
// Match returns a net.Listener that sees (i.e., accepts) only
// the connections matched by at least one of the matcher.
//
// The order used to call Match determines the priority of matchers.
Match(...Matcher) net.Listener
// Serve starts multiplexing the listener. Serve blocks and perhaps
// should be invoked concurrently within a go routine.
Serve() error
// HandleError registers an error handler that handles listener errors.
HandleError(ErrorHandler)
}
type matchersListener struct {
ss []Matcher
l muxListener
}
type cMux struct {
root net.Listener
bufLen int
errh ErrorHandler
donec chan struct{}
sls []matchersListener
}
func (m *cMux) Match(matchers ...Matcher) net.Listener {
ml := muxListener{
Listener: m.root,
connc: make(chan net.Conn, m.bufLen),
}
m.sls = append(m.sls, matchersListener{ss: matchers, l: ml})
return ml
}
func (m *cMux) Serve() error {
var wg sync.WaitGroup
defer func() {
close(m.donec)
wg.Wait()
for _, sl := range m.sls {
close(sl.l.connc)
// Drain the connections enqueued for the listener.
for c := range sl.l.connc {
_ = c.Close()
}
}
}()
for {
c, err := m.root.Accept()
if err != nil {
if !m.handleErr(err) {
return err
}
continue
}
wg.Add(1)
go m.serve(c, m.donec, &wg)
}
}
func (m *cMux) serve(c net.Conn, donec <-chan struct{}, wg *sync.WaitGroup) {
defer wg.Done()
muc := newMuxConn(c)
for _, sl := range m.sls {
for _, s := range sl.ss {
matched := s(muc.getSniffer())
if matched {
select {
case sl.l.connc <- muc:
case <-donec:
_ = c.Close()
}
return
}
}
}
_ = c.Close()
err := ErrNotMatched{c: c}
if !m.handleErr(err) {
_ = m.root.Close()
}
}
func (m *cMux) HandleError(h ErrorHandler) {
m.errh = h
}
func (m *cMux) handleErr(err error) bool {
if !m.errh(err) {
return false
}
if ne, ok := err.(net.Error); ok {
return ne.Temporary()
}
return false
}
type muxListener struct {
net.Listener
connc chan net.Conn
}
func (l muxListener) Accept() (net.Conn, error) {
c, ok := <-l.connc
if !ok {
return nil, ErrListenerClosed
}
return c, nil
}
// MuxConn wraps a net.Conn and provides transparent sniffing of connection data.
type MuxConn struct {
net.Conn
buf bytes.Buffer
sniffer bufferedReader
}
func newMuxConn(c net.Conn) *MuxConn {
return &MuxConn{
Conn: c,
}
}
// From the io.Reader documentation:
//
// 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.
func (m *MuxConn) Read(p []byte) (int, error) {
if n, err := m.buf.Read(p); err != io.EOF {
return n, err
}
return m.Conn.Read(p)
}
func (m *MuxConn) getSniffer() io.Reader {
m.sniffer = bufferedReader{source: m.Conn, buffer: &m.buf, bufferSize: m.buf.Len()}
return &m.sniffer
}

150
Godeps/_workspace/src/github.com/cockroachdb/cmux/matchers.go generated vendored Normal file
View File

@ -0,0 +1,150 @@
package cmux
import (
"bufio"
"io"
"io/ioutil"
"net/http"
"strings"
"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/http2"
"github.com/coreos/etcd/Godeps/_workspace/src/golang.org/x/net/http2/hpack"
)
// Any is a Matcher that matches any connection.
func Any() Matcher {
return func(r io.Reader) bool { return true }
}
// PrefixMatcher returns a matcher that matches a connection if it
// starts with any of the strings in strs.
func PrefixMatcher(strs ...string) Matcher {
pt := newPatriciaTreeString(strs...)
return pt.matchPrefix
}
var defaultHTTPMethods = []string{
"OPTIONS",
"GET",
"HEAD",
"POST",
"PUT",
"DELETE",
"TRACE",
"CONNECT",
}
// HTTP1Fast only matches the methods in the HTTP request.
//
// This matcher is very optimistic: if it returns true, it does not mean that
// the request is a valid HTTP response. If you want a correct but slower HTTP1
// matcher, use HTTP1 instead.
func HTTP1Fast(extMethods ...string) Matcher {
return PrefixMatcher(append(defaultHTTPMethods, extMethods...)...)
}
const maxHTTPRead = 4096
// HTTP1 parses the first line or upto 4096 bytes of the request to see if
// the conection contains an HTTP request.
func HTTP1() Matcher {
return func(r io.Reader) bool {
br := bufio.NewReader(&io.LimitedReader{R: r, N: maxHTTPRead})
l, part, err := br.ReadLine()
if err != nil || part {
return false
}
_, _, proto, ok := parseRequestLine(string(l))
if !ok {
return false
}
v, _, ok := http.ParseHTTPVersion(proto)
return ok && v == 1
}
}
// grabbed from net/http.
func parseRequestLine(line string) (method, uri, proto string, ok bool) {
s1 := strings.Index(line, " ")
s2 := strings.Index(line[s1+1:], " ")
if s1 < 0 || s2 < 0 {
return
}
s2 += s1 + 1
return line[:s1], line[s1+1 : s2], line[s2+1:], true
}
// HTTP2 parses the frame header of the first frame to detect whether the
// connection is an HTTP2 connection.
func HTTP2() Matcher {
return hasHTTP2Preface
}
// HTTP1HeaderField returns a matcher matching the header fields of the first
// request of an HTTP 1 connection.
func HTTP1HeaderField(name, value string) Matcher {
return func(r io.Reader) bool {
return matchHTTP1Field(r, name, value)
}
}
// HTTP2HeaderField resturns a matcher matching the header fields of the first
// headers frame.
func HTTP2HeaderField(name, value string) Matcher {
return func(r io.Reader) bool {
return matchHTTP2Field(r, name, value)
}
}
func hasHTTP2Preface(r io.Reader) bool {
var b [len(http2.ClientPreface)]byte
if _, err := io.ReadFull(r, b[:]); err != nil {
return false
}
return string(b[:]) == http2.ClientPreface
}
func matchHTTP1Field(r io.Reader, name, value string) (matched bool) {
req, err := http.ReadRequest(bufio.NewReader(r))
if err != nil {
return false
}
return req.Header.Get(name) == value
}
func matchHTTP2Field(r io.Reader, name, value string) (matched bool) {
if !hasHTTP2Preface(r) {
return false
}
framer := http2.NewFramer(ioutil.Discard, r)
hdec := hpack.NewDecoder(uint32(4<<10), func(hf hpack.HeaderField) {
if hf.Name == name && hf.Value == value {
matched = true
}
})
for {
f, err := framer.ReadFrame()
if err != nil {
return false
}
switch f := f.(type) {
case *http2.HeadersFrame:
if _, err := hdec.Write(f.HeaderBlockFragment()); err != nil {
return false
}
if matched {
return true
}
if f.FrameHeader.Flags&http2.FlagHeadersEndHeaders != 0 {
return false
}
}
}
}

173
Godeps/_workspace/src/github.com/cockroachdb/cmux/patricia.go generated vendored Normal file
View File

@ -0,0 +1,173 @@
package cmux
import (
"bytes"
"io"
)
// patriciaTree is a simple patricia tree that handles []byte instead of string
// and cannot be changed after instantiation.
type patriciaTree struct {
root *ptNode
}
func newPatriciaTree(b ...[]byte) *patriciaTree {
return &patriciaTree{
root: newNode(b),
}
}
func newPatriciaTreeString(strs ...string) *patriciaTree {
b := make([][]byte, len(strs))
for i, s := range strs {
b[i] = []byte(s)
}
return &patriciaTree{
root: newNode(b),
}
}
func (t *patriciaTree) matchPrefix(r io.Reader) bool {
return t.root.match(r, true)
}
func (t *patriciaTree) match(r io.Reader) bool {
return t.root.match(r, false)
}
type ptNode struct {
prefix []byte
next map[byte]*ptNode
terminal bool
}
func newNode(strs [][]byte) *ptNode {
if len(strs) == 0 {
return &ptNode{
prefix: []byte{},
terminal: true,
}
}
if len(strs) == 1 {
return &ptNode{
prefix: strs[0],
terminal: true,
}
}
p, strs := splitPrefix(strs)
n := &ptNode{
prefix: p,
}
nexts := make(map[byte][][]byte)
for _, s := range strs {
if len(s) == 0 {
n.terminal = true
continue
}
nexts[s[0]] = append(nexts[s[0]], s[1:])
}
n.next = make(map[byte]*ptNode)
for first, rests := range nexts {
n.next[first] = newNode(rests)
}
return n
}
func splitPrefix(bss [][]byte) (prefix []byte, rest [][]byte) {
if len(bss) == 0 || len(bss[0]) == 0 {
return prefix, bss
}
if len(bss) == 1 {
return bss[0], [][]byte{{}}
}
for i := 0; ; i++ {
var cur byte
eq := true
for j, b := range bss {
if len(b) <= i {
eq = false
break
}
if j == 0 {
cur = b[i]
continue
}
if cur != b[i] {
eq = false
break
}
}
if !eq {
break
}
prefix = append(prefix, cur)
}
rest = make([][]byte, 0, len(bss))
for _, b := range bss {
rest = append(rest, b[len(prefix):])
}
return prefix, rest
}
func readBytes(r io.Reader, n int) (b []byte, err error) {
b = make([]byte, n)
o := 0
for o < n {
nr, err := r.Read(b[o:])
if err != nil && err != io.EOF {
return b, err
}
o += nr
if err == io.EOF {
break
}
}
return b[:o], nil
}
func (n *ptNode) match(r io.Reader, prefix bool) bool {
if l := len(n.prefix); l > 0 {
b, err := readBytes(r, l)
if err != nil || len(b) != l || !bytes.Equal(b, n.prefix) {
return false
}
}
if prefix && n.terminal {
return true
}
b := make([]byte, 1)
for {
nr, err := r.Read(b)
if nr != 0 {
break
}
if err == io.EOF {
return n.terminal
}
if err != nil {
return false
}
}
nextN, ok := n.next[b[0]]
return ok && nextN.match(r, prefix)
}

2
etcdmain/serve.go
View File

@ -21,7 +21,7 @@ import (
"net/http"
"time"
"github.com/cockroachdb/cmux"
"github.com/coreos/etcd/Godeps/_workspace/src/github.com/cockroachdb/cmux"
"github.com/coreos/etcd/Godeps/_workspace/src/google.golang.org/grpc"
)