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Add vendor github.com/rs/xid
This commit is contained in:
parent
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commit
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19
vendor/github.com/rs/xid/LICENSE
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vendored
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vendor/github.com/rs/xid/LICENSE
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Copyright (c) 2015 Olivier Poitrey <rs@dailymotion.com>
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is furnished
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to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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9
vendor/github.com/rs/xid/hostid_darwin.go
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vendor/github.com/rs/xid/hostid_darwin.go
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// +build darwin
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package xid
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import "golang.org/x/sys/unix"
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func readPlatformMachineID() (string, error) {
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return unix.Sysctl("kern.uuid")
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}
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9
vendor/github.com/rs/xid/hostid_fallback.go
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vendor/github.com/rs/xid/hostid_fallback.go
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// +build !darwin,!linux,!freebsd,!windows
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package xid
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import "errors"
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func readPlatformMachineID() (string, error) {
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return "", errors.New("not implemented")
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}
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9
vendor/github.com/rs/xid/hostid_freebsd.go
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vendored
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vendor/github.com/rs/xid/hostid_freebsd.go
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// +build freebsd
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package xid
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import "golang.org/x/sys/unix"
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func readPlatformMachineID() (string, error) {
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return unix.Sysctl("kern.hostuuid")
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}
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10
vendor/github.com/rs/xid/hostid_linux.go
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10
vendor/github.com/rs/xid/hostid_linux.go
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// +build linux
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package xid
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import "io/ioutil"
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func readPlatformMachineID() (string, error) {
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b, err := ioutil.ReadFile("/sys/class/dmi/id/product_uuid")
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return string(b), err
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}
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39
vendor/github.com/rs/xid/hostid_windows.go
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vendor/github.com/rs/xid/hostid_windows.go
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// +build windows
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package xid
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import (
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"fmt"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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func readPlatformMachineID() (string, error) {
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// source: https://github.com/shirou/gopsutil/blob/master/host/host_windows.go
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var h windows.Handle
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err := windows.RegOpenKeyEx(windows.HKEY_LOCAL_MACHINE, windows.StringToUTF16Ptr(`SOFTWARE\Microsoft\Cryptography`), 0, windows.KEY_READ|windows.KEY_WOW64_64KEY, &h)
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if err != nil {
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return "", err
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}
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defer windows.RegCloseKey(h)
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const windowsRegBufLen = 74 // len(`{`) + len(`abcdefgh-1234-456789012-123345456671` * 2) + len(`}`) // 2 == bytes/UTF16
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const uuidLen = 36
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var regBuf [windowsRegBufLen]uint16
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bufLen := uint32(windowsRegBufLen)
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var valType uint32
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err = windows.RegQueryValueEx(h, windows.StringToUTF16Ptr(`MachineGuid`), nil, &valType, (*byte)(unsafe.Pointer(®Buf[0])), &bufLen)
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if err != nil {
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return "", err
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}
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hostID := windows.UTF16ToString(regBuf[:])
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hostIDLen := len(hostID)
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if hostIDLen != uuidLen {
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return "", fmt.Errorf("HostID incorrect: %q\n", hostID)
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}
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return hostID, nil
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}
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361
vendor/github.com/rs/xid/id.go
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361
vendor/github.com/rs/xid/id.go
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// Package xid is a globally unique id generator suited for web scale
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//
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// Xid is using Mongo Object ID algorithm to generate globally unique ids:
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// https://docs.mongodb.org/manual/reference/object-id/
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//
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// - 4-byte value representing the seconds since the Unix epoch,
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// - 3-byte machine identifier,
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// - 2-byte process id, and
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// - 3-byte counter, starting with a random value.
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//
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// The binary representation of the id is compatible with Mongo 12 bytes Object IDs.
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// The string representation is using base32 hex (w/o padding) for better space efficiency
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// when stored in that form (20 bytes). The hex variant of base32 is used to retain the
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// sortable property of the id.
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//
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// Xid doesn't use base64 because case sensitivity and the 2 non alphanum chars may be an
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// issue when transported as a string between various systems. Base36 wasn't retained either
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// because 1/ it's not standard 2/ the resulting size is not predictable (not bit aligned)
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// and 3/ it would not remain sortable. To validate a base32 `xid`, expect a 20 chars long,
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// all lowercase sequence of `a` to `v` letters and `0` to `9` numbers (`[0-9a-v]{20}`).
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//
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// UUID is 16 bytes (128 bits), snowflake is 8 bytes (64 bits), xid stands in between
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// with 12 bytes with a more compact string representation ready for the web and no
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// required configuration or central generation server.
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//
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// Features:
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//
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// - Size: 12 bytes (96 bits), smaller than UUID, larger than snowflake
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// - Base32 hex encoded by default (16 bytes storage when transported as printable string)
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// - Non configured, you don't need set a unique machine and/or data center id
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// - K-ordered
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// - Embedded time with 1 second precision
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// - Unicity guaranteed for 16,777,216 (24 bits) unique ids per second and per host/process
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//
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// Best used with xlog's RequestIDHandler (https://godoc.org/github.com/rs/xlog#RequestIDHandler).
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//
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// References:
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//
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// - http://www.slideshare.net/davegardnerisme/unique-id-generation-in-distributed-systems
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// - https://en.wikipedia.org/wiki/Universally_unique_identifier
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// - https://blog.twitter.com/2010/announcing-snowflake
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package xid
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import (
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"crypto/md5"
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"crypto/rand"
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"database/sql/driver"
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"encoding/binary"
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"errors"
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"fmt"
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"hash/crc32"
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"io/ioutil"
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"os"
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"sync/atomic"
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"time"
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"bytes"
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"sort"
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)
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// Code inspired from mgo/bson ObjectId
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// ID represents a unique request id
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type ID [rawLen]byte
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const (
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encodedLen = 20 // string encoded len
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rawLen = 12 // binary raw len
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// encoding stores a custom version of the base32 encoding with lower case
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// letters.
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encoding = "0123456789abcdefghijklmnopqrstuv"
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)
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var (
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// ErrInvalidID is returned when trying to unmarshal an invalid ID
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ErrInvalidID = errors.New("xid: invalid ID")
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// objectIDCounter is atomically incremented when generating a new ObjectId
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// using NewObjectId() function. It's used as a counter part of an id.
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// This id is initialized with a random value.
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objectIDCounter = randInt()
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// machineId stores machine id generated once and used in subsequent calls
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// to NewObjectId function.
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machineID = readMachineID()
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// pid stores the current process id
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pid = os.Getpid()
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nilID ID
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// dec is the decoding map for base32 encoding
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dec [256]byte
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)
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func init() {
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for i := 0; i < len(dec); i++ {
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dec[i] = 0xFF
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}
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for i := 0; i < len(encoding); i++ {
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dec[encoding[i]] = byte(i)
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}
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// If /proc/self/cpuset exists and is not /, we can assume that we are in a
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// form of container and use the content of cpuset xor-ed with the PID in
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// order get a reasonable machine global unique PID.
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b, err := ioutil.ReadFile("/proc/self/cpuset")
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if err == nil && len(b) > 1 {
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pid ^= int(crc32.ChecksumIEEE(b))
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}
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}
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// readMachineId generates machine id and puts it into the machineId global
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// variable. If this function fails to get the hostname, it will cause
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// a runtime error.
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func readMachineID() []byte {
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id := make([]byte, 3)
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hid, err := readPlatformMachineID()
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if err != nil || len(hid) == 0 {
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hid, err = os.Hostname()
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}
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if err == nil && len(hid) != 0 {
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hw := md5.New()
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hw.Write([]byte(hid))
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copy(id, hw.Sum(nil))
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} else {
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// Fallback to rand number if machine id can't be gathered
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if _, randErr := rand.Reader.Read(id); randErr != nil {
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panic(fmt.Errorf("xid: cannot get hostname nor generate a random number: %v; %v", err, randErr))
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}
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}
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return id
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}
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// randInt generates a random uint32
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func randInt() uint32 {
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b := make([]byte, 3)
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if _, err := rand.Reader.Read(b); err != nil {
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panic(fmt.Errorf("xid: cannot generate random number: %v;", err))
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}
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return uint32(b[0])<<16 | uint32(b[1])<<8 | uint32(b[2])
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}
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// New generates a globally unique ID
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func New() ID {
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var id ID
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// Timestamp, 4 bytes, big endian
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binary.BigEndian.PutUint32(id[:], uint32(time.Now().Unix()))
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// Machine, first 3 bytes of md5(hostname)
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id[4] = machineID[0]
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id[5] = machineID[1]
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id[6] = machineID[2]
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// Pid, 2 bytes, specs don't specify endianness, but we use big endian.
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id[7] = byte(pid >> 8)
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id[8] = byte(pid)
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// Increment, 3 bytes, big endian
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i := atomic.AddUint32(&objectIDCounter, 1)
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id[9] = byte(i >> 16)
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id[10] = byte(i >> 8)
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id[11] = byte(i)
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return id
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}
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// FromString reads an ID from its string representation
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func FromString(id string) (ID, error) {
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i := &ID{}
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err := i.UnmarshalText([]byte(id))
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return *i, err
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}
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// String returns a base32 hex lowercased with no padding representation of the id (char set is 0-9, a-v).
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func (id ID) String() string {
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text := make([]byte, encodedLen)
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encode(text, id[:])
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return string(text)
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}
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// MarshalText implements encoding/text TextMarshaler interface
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func (id ID) MarshalText() ([]byte, error) {
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text := make([]byte, encodedLen)
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encode(text, id[:])
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return text, nil
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}
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// MarshalJSON implements encoding/json Marshaler interface
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func (id ID) MarshalJSON() ([]byte, error) {
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if id.IsNil() {
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return []byte("null"), nil
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}
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text, err := id.MarshalText()
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return []byte(`"` + string(text) + `"`), err
|
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}
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// encode by unrolling the stdlib base32 algorithm + removing all safe checks
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func encode(dst, id []byte) {
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dst[0] = encoding[id[0]>>3]
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dst[1] = encoding[(id[1]>>6)&0x1F|(id[0]<<2)&0x1F]
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dst[2] = encoding[(id[1]>>1)&0x1F]
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dst[3] = encoding[(id[2]>>4)&0x1F|(id[1]<<4)&0x1F]
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dst[4] = encoding[id[3]>>7|(id[2]<<1)&0x1F]
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dst[5] = encoding[(id[3]>>2)&0x1F]
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dst[6] = encoding[id[4]>>5|(id[3]<<3)&0x1F]
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dst[7] = encoding[id[4]&0x1F]
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dst[8] = encoding[id[5]>>3]
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dst[9] = encoding[(id[6]>>6)&0x1F|(id[5]<<2)&0x1F]
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dst[10] = encoding[(id[6]>>1)&0x1F]
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dst[11] = encoding[(id[7]>>4)&0x1F|(id[6]<<4)&0x1F]
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dst[12] = encoding[id[8]>>7|(id[7]<<1)&0x1F]
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dst[13] = encoding[(id[8]>>2)&0x1F]
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dst[14] = encoding[(id[9]>>5)|(id[8]<<3)&0x1F]
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dst[15] = encoding[id[9]&0x1F]
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dst[16] = encoding[id[10]>>3]
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dst[17] = encoding[(id[11]>>6)&0x1F|(id[10]<<2)&0x1F]
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dst[18] = encoding[(id[11]>>1)&0x1F]
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dst[19] = encoding[(id[11]<<4)&0x1F]
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||||
}
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||||
// UnmarshalText implements encoding/text TextUnmarshaler interface
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func (id *ID) UnmarshalText(text []byte) error {
|
||||
if len(text) != encodedLen {
|
||||
return ErrInvalidID
|
||||
}
|
||||
for _, c := range text {
|
||||
if dec[c] == 0xFF {
|
||||
return ErrInvalidID
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}
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||||
}
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||||
decode(id, text)
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||||
return nil
|
||||
}
|
||||
|
||||
// UnmarshalJSON implements encoding/json Unmarshaler interface
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||||
func (id *ID) UnmarshalJSON(b []byte) error {
|
||||
s := string(b)
|
||||
if s == "null" {
|
||||
*id = nilID
|
||||
return nil
|
||||
}
|
||||
return id.UnmarshalText(b[1 : len(b)-1])
|
||||
}
|
||||
|
||||
// decode by unrolling the stdlib base32 algorithm + removing all safe checks
|
||||
func decode(id *ID, src []byte) {
|
||||
id[0] = dec[src[0]]<<3 | dec[src[1]]>>2
|
||||
id[1] = dec[src[1]]<<6 | dec[src[2]]<<1 | dec[src[3]]>>4
|
||||
id[2] = dec[src[3]]<<4 | dec[src[4]]>>1
|
||||
id[3] = dec[src[4]]<<7 | dec[src[5]]<<2 | dec[src[6]]>>3
|
||||
id[4] = dec[src[6]]<<5 | dec[src[7]]
|
||||
id[5] = dec[src[8]]<<3 | dec[src[9]]>>2
|
||||
id[6] = dec[src[9]]<<6 | dec[src[10]]<<1 | dec[src[11]]>>4
|
||||
id[7] = dec[src[11]]<<4 | dec[src[12]]>>1
|
||||
id[8] = dec[src[12]]<<7 | dec[src[13]]<<2 | dec[src[14]]>>3
|
||||
id[9] = dec[src[14]]<<5 | dec[src[15]]
|
||||
id[10] = dec[src[16]]<<3 | dec[src[17]]>>2
|
||||
id[11] = dec[src[17]]<<6 | dec[src[18]]<<1 | dec[src[19]]>>4
|
||||
}
|
||||
|
||||
// Time returns the timestamp part of the id.
|
||||
// It's a runtime error to call this method with an invalid id.
|
||||
func (id ID) Time() time.Time {
|
||||
// First 4 bytes of ObjectId is 32-bit big-endian seconds from epoch.
|
||||
secs := int64(binary.BigEndian.Uint32(id[0:4]))
|
||||
return time.Unix(secs, 0)
|
||||
}
|
||||
|
||||
// Machine returns the 3-byte machine id part of the id.
|
||||
// It's a runtime error to call this method with an invalid id.
|
||||
func (id ID) Machine() []byte {
|
||||
return id[4:7]
|
||||
}
|
||||
|
||||
// Pid returns the process id part of the id.
|
||||
// It's a runtime error to call this method with an invalid id.
|
||||
func (id ID) Pid() uint16 {
|
||||
return binary.BigEndian.Uint16(id[7:9])
|
||||
}
|
||||
|
||||
// Counter returns the incrementing value part of the id.
|
||||
// It's a runtime error to call this method with an invalid id.
|
||||
func (id ID) Counter() int32 {
|
||||
b := id[9:12]
|
||||
// Counter is stored as big-endian 3-byte value
|
||||
return int32(uint32(b[0])<<16 | uint32(b[1])<<8 | uint32(b[2]))
|
||||
}
|
||||
|
||||
// Value implements the driver.Valuer interface.
|
||||
func (id ID) Value() (driver.Value, error) {
|
||||
if id.IsNil() {
|
||||
return nil, nil
|
||||
}
|
||||
b, err := id.MarshalText()
|
||||
return string(b), err
|
||||
}
|
||||
|
||||
// Scan implements the sql.Scanner interface.
|
||||
func (id *ID) Scan(value interface{}) (err error) {
|
||||
switch val := value.(type) {
|
||||
case string:
|
||||
return id.UnmarshalText([]byte(val))
|
||||
case []byte:
|
||||
return id.UnmarshalText(val)
|
||||
case nil:
|
||||
*id = nilID
|
||||
return nil
|
||||
default:
|
||||
return fmt.Errorf("xid: scanning unsupported type: %T", value)
|
||||
}
|
||||
}
|
||||
|
||||
// IsNil Returns true if this is a "nil" ID
|
||||
func (id ID) IsNil() bool {
|
||||
return id == nilID
|
||||
}
|
||||
|
||||
// NilID returns a zero value for `xid.ID`.
|
||||
func NilID() ID {
|
||||
return nilID
|
||||
}
|
||||
|
||||
// Bytes returns the byte array representation of `ID`
|
||||
func (id ID) Bytes() []byte {
|
||||
return id[:]
|
||||
}
|
||||
|
||||
// FromBytes convert the byte array representation of `ID` back to `ID`
|
||||
func FromBytes(b []byte) (ID, error) {
|
||||
var id ID
|
||||
if len(b) != rawLen {
|
||||
return id, ErrInvalidID
|
||||
}
|
||||
copy(id[:], b)
|
||||
return id, nil
|
||||
}
|
||||
|
||||
// Compare returns an integer comparing two IDs. It behaves just like `bytes.Compare`.
|
||||
// The result will be 0 if two IDs are identical, -1 if current id is less than the other one,
|
||||
// and 1 if current id is greater than the other.
|
||||
func (id ID) Compare(other ID) int {
|
||||
return bytes.Compare(id[:], other[:])
|
||||
}
|
||||
|
||||
|
||||
type sorter []ID
|
||||
|
||||
func (s sorter) Len() int {
|
||||
return len(s)
|
||||
}
|
||||
|
||||
func (s sorter) Less(i, j int) bool {
|
||||
return s[i].Compare(s[j]) < 0
|
||||
}
|
||||
|
||||
func (s sorter) Swap(i, j int) {
|
||||
s[i], s[j] = s[j], s[i]
|
||||
}
|
||||
|
||||
// Sort sorts an array of IDs inplace.
|
||||
// It works by wrapping `[]ID` and use `sort.Sort`.
|
||||
func Sort(ids []ID) {
|
||||
sort.Sort(sorter(ids))
|
||||
}
|
8
vendor/manifest
vendored
8
vendor/manifest
vendored
@ -660,6 +660,14 @@
|
||||
"branch": "master",
|
||||
"notests": true
|
||||
},
|
||||
{
|
||||
"importpath": "github.com/rs/xid",
|
||||
"repository": "https://github.com/rs/xid",
|
||||
"vcs": "git",
|
||||
"revision": "088c5cf1423a6c8bd65110ddb12818e4ee993c84",
|
||||
"branch": "master",
|
||||
"notests": true
|
||||
},
|
||||
{
|
||||
"importpath": "github.com/saintfish/chardet",
|
||||
"repository": "https://github.com/saintfish/chardet",
|
||||
|
Loading…
Reference in New Issue
Block a user