func parseIndex(sql []byte) (indexName string, indexId interface{}, userId uint64) {
var err error
keyspaceIndex := bytes.Index(sql, KEYSPACE_ID_COMMENT)
if keyspaceIndex == -1 {
panic(NewBinlogParseError(fmt.Sprintf("Error parsing index comment, doesn't contain keyspace id %v", string(sql))))
}
keyspaceIdComment := sql[keyspaceIndex+len(KEYSPACE_ID_COMMENT):]
indexCommentStart := bytes.Index(keyspaceIdComment, INDEX_COMMENT)
if indexCommentStart != -1 {
indexCommentParts := bytes.SplitN(keyspaceIdComment[indexCommentStart:], COLON_BYTE, 2)
userId, err = strconv.ParseUint(string(bytes.SplitN(indexCommentParts[1], mysqlctl.SPACE, 2)[0]), 10, 64)
if err != nil {
panic(NewBinlogParseError(fmt.Sprintf("Error converting user_id %v", string(sql))))
}
indexNameId := bytes.Split(indexCommentParts[0], DOT_BYTE)
indexName = string(indexNameId[1])
if indexName == "username" {
indexId = string(bytes.TrimRight(indexNameId[2], COLON))
} else {
indexId, err = strconv.ParseUint(string(bytes.TrimRight(indexNameId[2], COLON)), 10, 64)
if err != nil {
panic(NewBinlogParseError(fmt.Sprintf("Error converting index id %v %v", string(bytes.TrimRight(indexNameId[2], COLON)), string(sql))))
}
}
}
return
}
func TestNew(t *testing.T) {
err := New("foo")
if err.Error() != "foo" {
t.Errorf("Wrong message")
}
err = New(fmt.Errorf("foo"))
if err.Error() != "foo" {
t.Errorf("Wrong message")
}
bs := [][]byte{New("foo").Stack(), debug.Stack()}
// Ignore the first line (as it contains the PC of the .Stack() call)
bs[0] = bytes.SplitN(bs[0], []byte("\n"), 2)[1]
bs[1] = bytes.SplitN(bs[1], []byte("\n"), 2)[1]
if bytes.Compare(bs[0], bs[1]) != 0 {
t.Errorf("Stack didn't match")
t.Errorf("%s", bs[0])
t.Errorf("%s", bs[1])
}
if err.ErrorStack() != err.TypeName()+" "+err.Error()+"\n"+string(err.Stack()) {
t.Errorf("ErrorStack is in the wrong format")
}
}
func statCpu(oC *tCommand) {
var aPass [2][7]int
var aTotl = [2]int{0, 0}
for a := 0; a < len(aPass); a++ {
aBuf, _ := ioutil.ReadFile("/proc/stat")
aLine := bytes.SplitN(aBuf, []byte{'\n'}, 3)
aLine = bytes.SplitN(aLine[1], []byte{' '}, 9)
for aN := 0; aN < len(aPass[0]); aN++ {
aPass[a][aN], _ = strconv.Atoi(string(aLine[aN+1]))
aTotl[a] += aPass[a][aN]
}
if a == 0 {
time.Sleep(time.Duration(150) * time.Millisecond)
}
}
var aArg string
for aN := 0; aN < len(aPass[0]); aN++ {
aPass[0][aN] = (aPass[1][aN] - aPass[0][aN]) * 1000 / (aTotl[1] - aTotl[0])
aArg += fmt.Sprintf("%4d.%d ", aPass[0][aN]/10, aPass[0][aN]%10)
}
oC.buf = []byte(fmt.Sprintf("%-6s %-6s %-6s %-6s %-6s %-6s %-6s\n%s\n",
"User %", "Niced", "System", "Idle", "IOWait", "IRQ", "SoftIRQ", aArg))
if sDebug {
fmt.Println(oC.name)
}
}
func ParseMessage(line []byte) *Message {
line = bytes.TrimSpace(line)
if len(line) <= 0 {
return nil
}
m := new(Message)
if line[0] == ':' {
split := bytes.SplitN(line, []byte{' '}, 2)
if len(split) <= 1 {
return nil
}
m.Prefix = string(split[0][1:])
line = split[1]
}
split := bytes.SplitN(line, []byte{':'}, 2)
args := bytes.Split(bytes.TrimSpace(split[0]), []byte{' '})
m.Command = string(bytes.ToUpper(args[0]))
m.Args = make([]string, 0, len(args))
for _, arg := range args[1:] {
m.Args = append(m.Args, string(arg))
}
if len(split) > 1 {
m.Args = append(m.Args, string(split[1]))
}
return m
}
// Decode job from byte slice
func decodeJob(data []byte) (job *Job, err error) {
if len(data) < 12 {
return nil, common.Errorf("Invalid data: %V", data)
}
datatype := common.BytesToUint32([4]byte{data[4], data[5], data[6], data[7]})
l := common.BytesToUint32([4]byte{data[8], data[9], data[10], data[11]})
if len(data[12:]) != int(l) {
return nil, common.Errorf("Invalid data: %V", data)
}
data = data[12:]
job = &Job{magicCode: common.RES, DataType: datatype, c: make(chan bool)}
switch datatype {
case common.JOB_ASSIGN:
s := bytes.SplitN(data, []byte{'\x00'}, 3)
if len(s) == 3 {
job.Handle = string(s[0])
job.Fn = string(s[1])
data = s[2]
}
case common.JOB_ASSIGN_UNIQ:
s := bytes.SplitN(data, []byte{'\x00'}, 4)
if len(s) == 4 {
job.Handle = string(s[0])
job.Fn = string(s[1])
job.UniqueId = string(s[2])
data = s[3]
}
}
job.Data = data
return
}
func main() {
s := []byte("1,2,3,4")
sep := []byte{','}
print(bytes.SplitN(s, sep, 2))
print(bytes.SplitN(s, sep, 0))
print(bytes.SplitN(s, sep, -1))
}
// Decode job from byte slice
func decodeInPack(data []byte) (inpack *inPack, l int, err error) {
if len(data) < minPacketLength { // valid package should not less 12 bytes
err = fmt.Errorf("Invalid data: %V", data)
return
}
dl := int(binary.BigEndian.Uint32(data[8:12]))
dt := data[minPacketLength : dl+minPacketLength]
if len(dt) != int(dl) { // length not equal
err = fmt.Errorf("Invalid data: %V", data)
return
}
inpack = getInPack()
inpack.dataType = binary.BigEndian.Uint32(data[4:8])
switch inpack.dataType {
case dtJobAssign:
s := bytes.SplitN(dt, []byte{'\x00'}, 3)
if len(s) == 3 {
inpack.handle = string(s[0])
inpack.fn = string(s[1])
inpack.data = s[2]
}
case dtJobAssignUniq:
s := bytes.SplitN(dt, []byte{'\x00'}, 4)
if len(s) == 4 {
inpack.handle = string(s[0])
inpack.fn = string(s[1])
inpack.uniqueId = string(s[2])
inpack.data = s[3]
}
default:
inpack.data = dt
}
l = dl + minPacketLength
return
}
func (o *Tree) SetBytes(b []byte) (err error) {
zr, e := zlib.NewReader(bytes.NewBuffer(b))
if e == nil {
defer zr.Close()
b, err = ioutil.ReadAll(zr)
if err != nil {
return err
}
}
o.Content = b
body := b
for {
split := bytes.SplitN(body, []byte{0}, 2)
split1 := bytes.SplitN(split[0], []byte{' '}, 2)
o.Entries = append(o.Entries, treeEntry{
Mode: string(split1[0]),
File: string(split1[1]),
Hash: split[1][0:20]})
body = split[1][20:]
if len(split[1]) == 20 {
break
}
}
return
}
func CreateSlackMessage(eventData []byte) SlackMessage {
// Assumes topic is of the form domain/name/icon␀msg
// but domain is ignored (should probably be slack.scraperwiki.com)
i := bytes.IndexByte(eventData, byte('\x00'))
if i == -1 {
return SlackMessage{
string(eventData),
"dinger",
":broken_heart:",
"#log",
}
}
splitEventData := bytes.SplitN(eventData, []byte("\x00"), 2)
route := splitEventData[0]
text := splitEventData[1]
splitRoute := bytes.SplitN(route, []byte("/"), 3)
name := splitRoute[1]
icon := splitRoute[2]
return SlackMessage{
string(text),
string(name),
string(icon),
"#log",
}
}
func (blp *Blp) parseRotateEvent(line []byte) {
rem := bytes.SplitN(line, mysqlctl.BINLOG_ROTATE_TO, 2)
rem2 := bytes.SplitN(rem[1], mysqlctl.POS, 2)
rotateFilename := strings.TrimSpace(string(rem2[0]))
rotatePos, err := strconv.ParseUint(string(rem2[1]), 10, 64)
if err != nil {
panic(NewBinlogParseError(fmt.Sprintf("Error in extracting rotate pos %v from line %s", err, string(line))))
}
if !blp.usingRelayLogs {
//If the file being parsed is a binlog,
//then the rotate events only correspond to itself.
blp.currentPosition.Position.MasterFilename = rotateFilename
blp.currentPosition.Position.MasterPosition = rotatePos
blp.globalState.parseStats.Add("BinlogRotate."+blp.keyrangeTag, 1)
} else {
//For relay logs, the rotate events could be that of relay log or the binlog,
//the prefix of rotateFilename is used to test which case is it.
logsDir, relayFile := path.Split(blp.currentPosition.Position.RelayFilename)
currentPrefix := strings.Split(relayFile, ".")[0]
rotatePrefix := strings.Split(rotateFilename, ".")[0]
if currentPrefix == rotatePrefix {
//relay log rotated
blp.currentPosition.Position.RelayFilename = path.Join(logsDir, rotateFilename)
blp.globalState.parseStats.Add("RelayRotate."+blp.keyrangeTag, 1)
} else {
//master file rotated
blp.currentPosition.Position.MasterFilename = rotateFilename
blp.currentPosition.Position.MasterPosition = rotatePos
blp.globalState.parseStats.Add("BinlogRotate."+blp.keyrangeTag, 1)
}
}
}
func TestStackFormatMatches(t *testing.T) {
defer func() {
err := recover()
if err != 'a' {
t.Fatal(err)
}
bs := [][]byte{Errorf("hi").StackTrace(), debug.Stack()}
// Ignore the first line (as it contains the PC of the .Stack() call)
bs[0] = bytes.SplitN(bs[0], []byte("\n"), 2)[1]
bs[1] = bytes.SplitN(bs[1], []byte("\n"), 2)[1]
if bytes.Compare(bs[0], bs[1]) != 0 {
t.Errorf("Stack didn't match")
t.Errorf("%s", bs[0])
t.Errorf("%s", bs[1])
}
}()
err := a()
if err != nil {
t.Error(err)
}
}
func ExampleSplitN() {
fmt.Printf("%q\n", bytes.SplitN([]byte("a,b,c"), []byte(","), 2))
z := bytes.SplitN([]byte("a,b,c"), []byte(","), 0)
fmt.Printf("%q (nil = %v)\n", z, z == nil)
// Output:
// ["a" "b,c"]
// [] (nil = true)
}
/*{{{ func (this *IniConfig) Parse(config_path string) (ConfigContainer, error)
* 解析配置文件
*/
func (this *IniConfig) Parse(config_path string) (ConfigContainer, error) {
fp, err := os.Open(config_path)
defer fp.Close()
if err != nil {
return nil, err
}
cfg := &IniConfigContainer{
//make(map[string]map[string]string),
make(config_node),
}
buff := bufio.NewReader(fp)
var mod string
for {
line, _, err := buff.ReadLine()
if io.EOF == err {
break
}
if bytes.Equal(line, empty) {
continue
}
line = bytes.TrimSpace(line)
if bytes.HasPrefix(line, AnnoPrefix) {
continue
}
if bytes.HasPrefix(line, ModLeft) && bytes.HasSuffix(line, ModRight) {
mod = string(line[1 : len(line)-1])
continue
}
if mod == "" {
continue
}
if _, ok := cfg.data[mod]; ok == false {
cfg.data[mod] = make(config_node)
}
vals := bytes.SplitN(line, Equal, 2)
if len(vals) < 2 {
continue
}
section_val := bytes.SplitN(vals[0], SectionSplit, 2)
if len(section_val) < 2 {
cfg.data[mod].(config_node)[string(bytes.TrimSpace(vals[0]))] = string(bytes.TrimSpace(vals[1]))
} else {
section := string(bytes.TrimSpace(section_val[0]))
if _, ok := cfg.data[mod].(config_node)[section]; ok == false {
cfg.data[mod].(config_node)[section] = make(config_node)
}
cfg.data[mod].(config_node)[section].(config_node)[string(bytes.TrimSpace(section_val[1]))] = string(bytes.TrimSpace(vals[1]))
}
}
return cfg, nil
}
// startAgent executes ssh-agent, and returns a Agent interface to it.
func startAgent(t *testing.T) (client Agent, socket string, cleanup func()) {
if testing.Short() {
// ssh-agent is not always available, and the key
// types supported vary by platform.
t.Skip("skipping test due to -short")
}
bin, err := exec.LookPath("ssh-agent")
if err != nil {
t.Skip("could not find ssh-agent")
}
cmd := exec.Command(bin, "-s")
out, err := cmd.Output()
if err != nil {
t.Fatalf("cmd.Output: %v", err)
}
/* Output looks like:
SSH_AUTH_SOCK=/tmp/ssh-P65gpcqArqvH/agent.15541; export SSH_AUTH_SOCK;
SSH_AGENT_PID=15542; export SSH_AGENT_PID;
echo Agent pid 15542;
*/
fields := bytes.Split(out, []byte(";"))
line := bytes.SplitN(fields[0], []byte("="), 2)
line[0] = bytes.TrimLeft(line[0], "\n")
if string(line[0]) != "SSH_AUTH_SOCK" {
t.Fatalf("could not find key SSH_AUTH_SOCK in %q", fields[0])
}
socket = string(line[1])
line = bytes.SplitN(fields[2], []byte("="), 2)
line[0] = bytes.TrimLeft(line[0], "\n")
if string(line[0]) != "SSH_AGENT_PID" {
t.Fatalf("could not find key SSH_AGENT_PID in %q", fields[2])
}
pidStr := line[1]
pid, err := strconv.Atoi(string(pidStr))
if err != nil {
t.Fatalf("Atoi(%q): %v", pidStr, err)
}
conn, err := net.Dial("unix", string(socket))
if err != nil {
t.Fatalf("net.Dial: %v", err)
}
ac := NewClient(conn)
return ac, socket, func() {
proc, _ := os.FindProcess(pid)
if proc != nil {
proc.Kill()
}
conn.Close()
os.RemoveAll(filepath.Dir(socket))
}
}
func (blp *Blp) parseMasterPosition(line []byte) {
var err error
rem := bytes.SplitN(line, mysqlctl.BINLOG_END_LOG_POS, 2)
masterPosStr := string(bytes.SplitN(rem[1], mysqlctl.SPACE, 2)[0])
blp.nextStmtPosition, err = strconv.ParseUint(masterPosStr, 10, 64)
if err != nil {
panic(NewBinlogParseError(fmt.Sprintf("Error in extracting master position, %v, sql %v, pos string %v", err, string(line), masterPosStr)))
}
}
func (blp *Blp) parseGroupId(line []byte) {
rem := bytes.SplitN(line, mysqlctl.BINLOG_GROUP_ID, 2)
rem2 := bytes.SplitN(rem[1], mysqlctl.SPACE, 2)
groupIdStr := strings.TrimSpace(string(rem2[0]))
groupId, err := strconv.ParseUint(groupIdStr, 10, 64)
if err != nil {
panic(NewBinlogParseError(fmt.Sprintf("Error in extracting group_id %v, sql %v", err, string(line))))
}
blp.currentPosition.GroupId = groupId
}
func (p *AuthDbusCookieSha1) ProcessData(mesg []byte) ([]byte, error) {
decodedLen, err := hex.Decode(mesg, mesg)
if err != nil {
return nil, err
}
mesgTokens := bytes.SplitN(mesg[:decodedLen], []byte(" "), 3)
file, err := os.Open(os.Getenv("HOME") + "/.dbus-keyrings/" + string(mesgTokens[0]))
if err != nil {
return nil, err
}
defer file.Close()
fileStream := bufio.NewReader(file)
var cookie []byte
for {
line, _, err := fileStream.ReadLine()
if err == io.EOF {
return nil, errors.New("SHA1 Cookie not found")
} else if err != nil {
return nil, err
}
cookieTokens := bytes.SplitN(line, []byte(" "), 3)
if bytes.Compare(cookieTokens[0], mesgTokens[1]) == 0 {
cookie = cookieTokens[2]
break
}
}
challenge := make([]byte, len(mesgTokens[2]))
if _, err = rand.Read(challenge); err != nil {
return nil, err
}
for temp := challenge; ; {
if index := bytes.IndexAny(temp, " \t"); index == -1 {
break
} else if _, err := rand.Read(temp[index : index+1]); err != nil {
return nil, err
} else {
temp = temp[index:]
}
}
hash := sha1.New()
if _, err := hash.Write(bytes.Join([][]byte{mesgTokens[2], challenge, cookie}, []byte(":"))); err != nil {
return nil, err
}
resp := bytes.Join([][]byte{challenge, []byte(hex.EncodeToString(hash.Sum(nil)))}, []byte(" "))
respHex := make([]byte, hex.EncodedLen(len(resp)))
hex.Encode(respHex, resp)
return append([]byte("DATA "), respHex...), nil
}
func (blp *Bls) parseRotateEvent(line []byte) {
rem := bytes.SplitN(line, BINLOG_ROTATE_TO, 2)
rem2 := bytes.SplitN(rem[1], POS, 2)
rotateFilename := strings.TrimSpace(string(rem2[0]))
rotatePos, err := strconv.ParseUint(string(rem2[1]), 10, 64)
if err != nil {
panic(newBinlogServerError(fmt.Sprintf("Error in extracting rotate pos %v from line %s", err, string(line))))
}
//If the file being parsed is a binlog,
//then the rotate events only correspond to itself.
blp.currentPosition.Position.MasterFilename = rotateFilename
blp.currentPosition.Position.MasterPosition = rotatePos
blp.globalState.blsStats.parseStats.Add("BinlogRotate."+blp.keyrangeTag, 1)
}
func (c *AutoScheduler) listHost(host *Host, dir string) {
rs, err := host.Get(dir)
if err != nil || rs == nil {
return
}
for _, line := range bytes.SplitN(rs.Body, []byte("\n"), 17) {
if bytes.Count(line, []byte(" ")) < 2 || line[1] != '/' {
continue
}
vv := bytes.SplitN(line, []byte(" "), 3)
cnt, _ := strconv.ParseFloat(string(vv[2]), 64)
adjust := float64(math.Sqrt(cnt))
c.Feedback(host, dir+string(vv[0]), adjust)
}
}
// ParseLine turns a line into a *Metric (or not) and returns an error if the line was invalid.
// note that *Metric can be nil when the line was valid (if the line was empty)
// input format: key:value|modifier[|@samplerate]
func ParseLine(line []byte) (metric *common.Metric, err error) {
// todo: modify this function to use regex.
if len(line) == 0 {
return nil, nil
}
parts := bytes.SplitN(bytes.TrimSpace(line), []byte(":"), -1)
// If there are more than two colons, return error.
if len(parts) != 2 {
return nil, errors.New("bad amount of colons")
}
bucket := parts[0]
if len(bucket) == 0 {
return nil, errors.New("key zero len")
}
parts = bytes.SplitN(parts[1], []byte("|"), 3)
if len(parts) < 2 {
return nil, errors.New("bad amount of pipes")
}
modifier := string(parts[1])
// todo: put modifiers in a global set so that adding/removing modifiers would be much easy.
if modifier != "g" && modifier != "c" && modifier != "ms" {
return nil, errors.New("unsupported metric type")
}
sampleRate := float64(1)
if len(parts) == 3 {
if parts[2][0] != byte('@') {
return nil, errors.New("invalid sampling")
}
var err error
sampleRate, err = strconv.ParseFloat(string(parts[2])[1:], 32)
if err != nil {
return nil, err
}
}
value, err := strconv.ParseFloat(string(parts[0]), 64)
if err != nil {
return nil, err
}
isDelta := parts[0][0] == '+' || parts[0][0] == '-'
metric = &common.Metric{
Bucket: string(bucket),
Value: value,
Modifier: modifier,
Sampling: float32(sampleRate),
IsDelta: isDelta,
}
return metric, nil
}
// returns an input channel with a raw key, value without collating keys
func RawInternalInputProtocol(input io.Reader) <-chan KeyValue {
out := make(chan KeyValue, 100)
go func() {
var line []byte
var lineErr error
r := bufio.NewReaderSize(input, 1024*1024*2)
var lastKey []byte
for {
if lineErr == io.EOF {
break
}
line, lineErr = r.ReadBytes('\n')
if len(line) <= 1 {
continue
}
chunks := bytes.SplitN(line, []byte("\t"), 2)
if len(chunks) != 2 {
Counter("RawInternalInputProtocol", "invalid line - no tab", 1)
log.Printf("invalid line. no tab - %s", line)
lastKey = lastKey[:0]
continue
}
out <- KeyValue{chunks[0], chunks[1]}
}
close(out)
}()
return out
}
// Write parses the standard logging line and passes its components to the
// logger for Severity(lb).
func (lb logBridge) Write(b []byte) (n int, err error) {
var (
file = "???"
line = 1
text string
)
// Split "d.go:23: message" into "d.go", "23", and "message".
if parts := bytes.SplitN(b, []byte{':'}, 3); len(parts) != 3 || len(parts[0]) < 1 || len(parts[2]) < 1 {
text = fmt.Sprintf("bad log format: %s", b)
} else {
file = string(parts[0])
text = string(parts[2][1 : len(parts[2])-1]) // skip leading space and trailing newline
line, err = strconv.Atoi(string(parts[1]))
if err != nil {
text = fmt.Sprintf("bad line number: %s", b)
line = 1
}
}
// printWithFileLine with alsoToStderr=true, so standard log messages
// always appear on standard error.
entry := &LogEntry{
Format: text,
}
logging.outputLogEntry(Severity(lb), file, line, true, entry)
return len(b), nil
}
func findNews(text [][]byte, address, sender string) []byte {
// prep the address for searching against text
addr := []byte(address)
addrStart := bytes.SplitN(addr, []byte("@"), 2)[0]
// so we can reuse similar addresses?
if len(addrStart) > 15 {
addrStart = addrStart[:15]
}
var news [][]byte
badLines := 0
senderBytes := bytes.ToLower([]byte(sender))
for _, line := range text {
line := bytes.Trim(line, "-| ?")
if isNews(line, addr, addrStart, senderBytes) {
badLines = 0
news = append(news, line)
} else if (len(news) > 0) && (len(line) > 0) {
badLines++
}
// get at most 3 or quit if we have bad rows and at least 2 or over 2 bads and 1 good
if (len(news) >= 3) || ((badLines > 0) && (len(news) >= 2)) || ((badLines >= 2) && (len(news) >= 1)) {
break
}
}
return bytes.Join(news, []byte(" "))
}
func FileGetConfig(filenameOrURL string, timeout ...time.Duration) (map[string]string, error) {
data, err := FileGetBytes(filenameOrURL, timeout...)
if err != nil {
return nil, err
}
lines := bytes.Split(data, []byte("\n"))
config := make(map[string]string, len(lines))
for _, line := range lines {
kv := bytes.SplitN(line, []byte("="), 2)
if len(kv) < 2 {
continue
}
key := string(bytes.TrimSpace(kv[0]))
if len(key) == 0 || key[0] == '#' {
continue
}
value := string(bytes.TrimSpace(kv[1]))
if len(value) >= 2 && value[0] == '"' && value[len(value)-1] == '"' {
value = value[1 : len(value)-1]
}
config[key] = value
}
return config, nil
}
func readKey() (string, error) {
c, err := ioutil.ReadFile(*keyFile)
if err != nil {
return "", err
}
return string(bytes.TrimSpace(bytes.SplitN(c, []byte("\n"), 2)[0])), nil
}
func (c *codec) Decode(b []byte) (Message, error) {
// [message type] ':' [message id ('+')] ':' [message endpoint] (':' [message data])
parts := bytes.SplitN(b, []byte(":"), 4)
if len(parts) < 3 {
return nil, errors.New("invalid packet")
}
mtype, err := strconv.Atoi(string(parts[0]))
if err != nil {
return nil, err
}
idPart := parts[1]
ack := bytes.HasSuffix(idPart, []byte("+"))
if ack {
idPart = idPart[:len(idPart)-1]
}
pid, err := strconv.Atoi(string(idPart))
if err != nil {
return nil, err
}
endpoint := string(parts[2])
var r io.Reader
if len(parts) == 4 {
r = bytes.NewBuffer(parts[3])
}
return newMessage(mtype, pid, ack, endpoint, r), nil
}
// LinesBeforeAndAfter reads n lines before and after a given line.
// Set lineNumbers to true, to prepend line numbers.
func LinesBeforeAndAfter(data []byte, line, before, after int, lineNumbers bool) []byte {
// TODO(mattes): Trim empty lines at the beginning and at the end
// TODO(mattes): Trim offset whitespace at the beginning of each line, so that indentation is preserved
startLine := line - before
endLine := line + after
lines := bytes.SplitN(data, []byte("\n"), endLine+1)
if startLine < 0 {
startLine = 0
}
if endLine > len(lines) {
endLine = len(lines)
}
selectLines := lines[startLine:endLine]
newLines := make([][]byte, 0)
lineCounter := startLine + 1
lineNumberDigits := len(strconv.Itoa(len(selectLines)))
for _, l := range selectLines {
lineCounterStr := strconv.Itoa(lineCounter)
if len(lineCounterStr)%lineNumberDigits != 0 {
lineCounterStr = strings.Repeat(" ", lineNumberDigits-len(lineCounterStr)%lineNumberDigits) + lineCounterStr
}
lNew := l
if lineNumbers {
lNew = append([]byte(lineCounterStr+": "), lNew...)
}
newLines = append(newLines, lNew)
lineCounter += 1
}
return bytes.Join(newLines, []byte("\n"))
}
// Decode decodes list of capabilities from raw into the list
func (l *List) Decode(raw []byte) error {
// git 1.x receive pack used to send a leading space on its
// git-receive-pack capabilities announcement. We just trim space to be
// tolerant to space changes in different versions.
raw = bytes.TrimSpace(raw)
if len(raw) == 0 {
return nil
}
for _, data := range bytes.Split(raw, []byte{' '}) {
pair := bytes.SplitN(data, []byte{'='}, 2)
c := Capability(pair[0])
if len(pair) == 1 {
if err := l.Add(c); err != nil {
return err
}
continue
}
if err := l.Add(c, string(pair[1])); err != nil {
return err
}
}
return nil
}
func NewBuilder(goroot *Repo, name string) (*Builder, error) {
b := &Builder{
goroot: goroot,
name: name,
}
// get builderEnv for this tool
var err error
if b.env, err = b.builderEnv(name); err != nil {
return nil, err
}
// read keys from keyfile
fn := ""
switch runtime.GOOS {
case "plan9":
fn = os.Getenv("home")
case "windows":
fn = os.Getenv("HOMEDRIVE") + os.Getenv("HOMEPATH")
default:
fn = os.Getenv("HOME")
}
fn = filepath.Join(fn, ".gobuildkey")
if s := fn + "-" + b.name; isFile(s) { // builder-specific file
fn = s
}
c, err := ioutil.ReadFile(fn)
if err != nil {
return nil, fmt.Errorf("readKeys %s (%s): %s", b.name, fn, err)
}
b.key = string(bytes.TrimSpace(bytes.SplitN(c, []byte("\n"), 2)[0]))
return b, nil
}
// DecodeServerEntry extracts server entries from the encoding
// used by remote server lists and Psiphon server handshake requests.
//
// The resulting ServerEntry.LocalSource is populated with serverEntrySource,
// which should be one of SERVER_ENTRY_SOURCE_EMBEDDED, SERVER_ENTRY_SOURCE_REMOTE,
// SERVER_ENTRY_SOURCE_DISCOVERY, SERVER_ENTRY_SOURCE_TARGET.
// ServerEntry.LocalTimestamp is populated with the provided timestamp, which
// should be a RFC 3339 formatted string. These local fields are stored with the
// server entry and reported to the server as stats (a coarse granularity timestamp
// is reported).
func DecodeServerEntry(
encodedServerEntry, timestamp,
serverEntrySource string) (serverEntry *ServerEntry, err error) {
hexDecodedServerEntry, err := hex.DecodeString(encodedServerEntry)
if err != nil {
return nil, common.ContextError(err)
}
// Skip past legacy format (4 space delimited fields) and just parse the JSON config
fields := bytes.SplitN(hexDecodedServerEntry, []byte(" "), 5)
if len(fields) != 5 {
return nil, common.ContextError(errors.New("invalid encoded server entry"))
}
serverEntry = new(ServerEntry)
err = json.Unmarshal(fields[4], &serverEntry)
if err != nil {
return nil, common.ContextError(err)
}
// NOTE: if the source JSON happens to have values in these fields, they get clobbered.
serverEntry.LocalSource = serverEntrySource
serverEntry.LocalTimestamp = timestamp
return serverEntry, nil
}