1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846
|
//Package libhosty is a pure golang library to manipulate the hosts file
package libhosty
import (
"io/ioutil"
"net"
"os"
"regexp"
"runtime"
"strings"
"sync"
)
const (
//Version exposes library version
Version = "2.0"
)
const (
// defines default path for windows os
windowsFilePath = "C:\\Windows\\System32\\drivers\\etc\\"
// defines default path for linux os
unixFilePath = "/etc/"
// defines default filename
hostsFileName = "hosts"
)
//LineType define a safe type for line type enumeration
type LineType int
const (
//LineTypeUnknown defines unknown lines
LineTypeUnknown LineType = 0
//LineTypeEmpty defines empty lines
LineTypeEmpty LineType = 10
//LineTypeComment defines comment lines (starts with #)
LineTypeComment LineType = 20
//LineTypeAddress defines address lines (actual hosts lines)
LineTypeAddress LineType = 30
)
//HostsFileConfig defines parameters to find hosts file.
// FilePath is the absolute path of the hosts file (filename included)
type HostsFileConfig struct {
FilePath string
}
//HostsFileLine holds hosts file lines data
type HostsFileLine struct {
//Number is the original line number
Number int
//LineType defines the line type
Type LineType
//Address is a net.IP representation of the address
Address net.IP
//Parts is a slice of the line splitted by '#'
Parts []string
//Hostnames is a slice of hostnames for the relative IP
Hostnames []string
//Raw is the raw representation of the line, as it is in the hosts file
Raw string
//Comment is the comment part of the line (if present in an ADDRESS line)
Comment string
//IsCommented to know if the current ADDRESS line is commented out (starts with '#')
IsCommented bool
//trimed is a trimed version (no spaces before and after) of the line
trimed string
}
//HostsFile is a reference for the hosts file configuration and lines
type HostsFile struct {
sync.Mutex
//Config reference to a HostsConfig object
Config *HostsFileConfig
//HostsFileLines slice of HostsFileLine objects
HostsFileLines []HostsFileLine
}
//InitWithConfig returns a new instance of a hostsfile.
// InitWithConfig is meant to be used with a custom conf file
// however InitWithConfig() will fallback to Init() if conf is nill
// You should use Init() to load hosts file from default location
func InitWithConfig(conf *HostsFileConfig) (*HostsFile, error) {
var config *HostsFileConfig
var err error
if conf != nil {
config = conf
} else {
return Init()
}
// allocate a new HostsFile object
hf := &HostsFile{
// use default configuration
Config: config,
// allocate a new slice of HostsFileLine objects
HostsFileLines: make([]HostsFileLine, 0),
}
// parse the hosts file and load file lines
hf.HostsFileLines, err = ParseHostsFile(hf.Config.FilePath)
if err != nil {
return nil, err
}
//return HostsFile
return hf, nil
}
//Init returns a new instance of a hostsfile.
func Init() (*HostsFile, error) {
// initialize hostsConfig
config, err := NewHostsFileConfig("")
if err != nil {
return nil, err
}
// allocate a new HostsFile object
hf := &HostsFile{
// use default configuration
Config: config,
// allocate a new slice of HostsFileLine objects
HostsFileLines: make([]HostsFileLine, 0),
}
// parse the hosts file and load file lines
hf.HostsFileLines, err = ParseHostsFile(hf.Config.FilePath)
if err != nil {
return nil, err
}
//return HostsFile
return hf, nil
}
//NewHostsFileConfig loads hosts file based on environment.
// NewHostsFileConfig initialize the default file path based
// on the OS or from a given location if a custom path is provided
func NewHostsFileConfig(path string) (*HostsFileConfig, error) {
// allocate hostsConfig
var hc *HostsFileConfig
// ensure custom path exists
// https://stackoverflow.com/questions/12518876/how-to-check-if-a-file-exists-in-go
if fh, err := os.Stat(path); err == nil {
// eusure custom path points to a file (not a directory)
if !fh.IsDir() {
hc = &HostsFileConfig{
FilePath: path,
}
}
} else {
// check os to construct default path
switch runtime.GOOS {
case "windows":
hc = &HostsFileConfig{
FilePath: windowsFilePath + hostsFileName,
}
default:
hc = &HostsFileConfig{
FilePath: unixFilePath + hostsFileName,
}
}
}
return hc, nil
}
//GetHostsFileLines returns every address row
func (h *HostsFile) GetHostsFileLines() []*HostsFileLine {
var hfl []*HostsFileLine
for idx := range h.HostsFileLines {
if h.HostsFileLines[idx].Type == LineTypeAddress {
hfl = append(hfl, h.GetHostsFileLineByRow(idx))
}
}
return hfl
}
//GetHostsFileLineByRow returns a ponter to the given HostsFileLine row
func (h *HostsFile) GetHostsFileLineByRow(row int) *HostsFileLine {
return &h.HostsFileLines[row]
}
//GetHostsFileLineByIP returns the index of the line and a ponter to the given HostsFileLine line
func (h *HostsFile) GetHostsFileLineByIP(ip net.IP) (int, *HostsFileLine) {
if ip == nil {
return -1, nil
}
for idx := range h.HostsFileLines {
if net.IP.Equal(ip, h.HostsFileLines[idx].Address) {
return idx, &h.HostsFileLines[idx]
}
}
return -1, nil
}
func (h *HostsFile) GetHostsFileLinesByIP(ip net.IP) []*HostsFileLine {
if ip == nil {
return nil
}
hfl := make([]*HostsFileLine, 0)
for idx := range h.HostsFileLines {
if net.IP.Equal(ip, h.HostsFileLines[idx].Address) {
hfl = append(hfl, &h.HostsFileLines[idx])
}
}
return hfl
}
//GetHostsFileLineByAddress returns the index of the line and a ponter to the given HostsFileLine line
func (h *HostsFile) GetHostsFileLineByAddress(address string) (int, *HostsFileLine) {
ip := net.ParseIP(address)
return h.GetHostsFileLineByIP(ip)
}
func (h *HostsFile) GetHostsFileLinesByAddress(address string) []*HostsFileLine {
ip := net.ParseIP(address)
return h.GetHostsFileLinesByIP(ip)
}
//GetHostsFileLineByHostname returns the index of the line and a ponter to the given HostsFileLine line
func (h *HostsFile) GetHostsFileLineByHostname(hostname string) (int, *HostsFileLine) {
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
return idx, &h.HostsFileLines[idx]
}
}
}
return -1, nil
}
func (h *HostsFile) GetHostsFileLinesByHostname(hostname string) []*HostsFileLine {
hfl := make([]*HostsFileLine, 0)
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
hfl = append(hfl, &h.HostsFileLines[idx])
continue
}
}
}
return hfl
}
func (h *HostsFile) GetHostsFileLinesByHostnameAsRegexp(hostname string) []*HostsFileLine {
hfl := make([]*HostsFileLine, 0)
reg := regexp.MustCompile(hostname)
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if reg.MatchString(hn) {
hfl = append(hfl, &h.HostsFileLines[idx])
continue
}
}
}
return hfl
}
//RenderHostsFile render and returns the hosts file with the lineFormatter() routine
func (h *HostsFile) RenderHostsFile() string {
// allocate a buffer for file lines
var sliceBuffer []string
// iterate HostsFileLines and popolate the buffer with formatted lines
for _, l := range h.HostsFileLines {
sliceBuffer = append(sliceBuffer, lineFormatter(l))
}
// strings.Join() prevent the last line from being a new blank line
// as opposite to a for loop with fmt.Printf(buffer + '\n')
return strings.Join(sliceBuffer, "\n")
}
//RenderHostsFileLine render and returns the given hosts line with the lineFormatter() routine
func (h *HostsFile) RenderHostsFileLine(row int) string {
// iterate to find the row to render
if len(h.HostsFileLines) > row {
return lineFormatter(h.HostsFileLines[row])
}
return ""
}
//SaveHostsFile write hosts file to configured path.
// error is not nil if something goes wrong
func (h *HostsFile) SaveHostsFile() error {
return h.SaveHostsFileAs(h.Config.FilePath)
}
//SaveHostsFileAs write hosts file to the given path.
// error is not nil if something goes wrong
func (h *HostsFile) SaveHostsFileAs(path string) error {
// render the file as a byte slice
dataBytes := []byte(h.RenderHostsFile())
// write file to disk
err := ioutil.WriteFile(path, dataBytes, 0644)
if err != nil {
return err
}
return nil
}
//RemoveHostsFileLineByRow remove row at given index from HostsFileLines
func (h *HostsFile) RemoveHostsFileLineByRow(row int) {
// prevent out-of-index
if row < len(h.HostsFileLines) {
h.Lock()
h.HostsFileLines = append(h.HostsFileLines[:row], h.HostsFileLines[row+1:]...)
h.Unlock()
}
}
func (h *HostsFile) RemoveHostsFileLineByIP(ip net.IP) {
for idx := len(h.HostsFileLines) - 1; idx >= 0; idx-- {
if net.IP.Equal(ip, h.HostsFileLines[idx].Address) {
h.RemoveHostsFileLineByRow(idx)
return
}
}
}
func (h *HostsFile) RemoveHostsFileLinesByIP(ip net.IP) {
for idx := len(h.HostsFileLines) - 1; idx >= 0; idx-- {
if net.IP.Equal(ip, h.HostsFileLines[idx].Address) {
h.RemoveHostsFileLineByRow(idx)
}
}
}
func (h *HostsFile) RemoveHostsFileLineByAddress(address string) {
ip := net.ParseIP(address)
h.RemoveHostsFileLineByIP(ip)
}
func (h *HostsFile) RemoveHostsFileLinesByAddress(address string) {
ip := net.ParseIP(address)
h.RemoveHostsFileLinesByIP(ip)
}
func (h *HostsFile) RemoveHostsFileLineByHostname(hostname string) {
for idx := len(h.HostsFileLines) - 1; idx >= 0; idx-- {
if h.HostsFileLines[idx].Type == LineTypeAddress {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
h.RemoveHostsFileLineByRow(idx)
return
}
}
}
}
}
func (h *HostsFile) RemoveHostsFileLinesByHostnameAsRegexp(hostname string) {
reg := regexp.MustCompile(hostname)
for idx := len(h.HostsFileLines) - 1; idx >= 0; idx-- {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if reg.MatchString(hn) {
h.RemoveHostsFileLineByRow(idx)
continue
}
}
}
}
func (h *HostsFile) RemoveHostsFileLinesByHostname(hostname string) {
for idx := len(h.HostsFileLines) - 1; idx >= 0; idx-- {
if h.HostsFileLines[idx].Type == LineTypeAddress {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
h.RemoveHostsFileLineByRow(idx)
continue
}
}
}
}
}
//LookupByHostname check if the given fqdn exists.
// if yes, it returns the index of the address and the associated address.
// error is not nil if something goes wrong
func (h *HostsFile) LookupByHostname(hostname string) (int, net.IP, error) {
for idx, hfl := range h.HostsFileLines {
for _, hn := range hfl.Hostnames {
if hn == hostname {
return idx, h.HostsFileLines[idx].Address, nil
}
}
}
return -1, nil, ErrHostnameNotFound
}
//AddHostsFileLineRaw add the given ip/fqdn/comment pair
// this is different from AddHostFileLine because it does not take care of duplicates
// this just append the new entry to the hosts file
func (h *HostsFile) AddHostsFileLineRaw(ipRaw, fqdnRaw, comment string) (int, *HostsFileLine, error) {
// hostname to lowercase
hostname := strings.ToLower(fqdnRaw)
// parse ip to net.IP
ip := net.ParseIP(ipRaw)
// if we have a valid IP
if ip != nil {
// create a new hosts line
hfl := HostsFileLine{
Type: LineTypeAddress,
Address: ip,
Hostnames: []string{hostname},
Comment: comment,
IsCommented: false,
}
// append to hosts
h.HostsFileLines = append(h.HostsFileLines, hfl)
// get index
idx := len(h.HostsFileLines) - 1
// return created entry
return idx, &h.HostsFileLines[idx], nil
}
// return error
return -1, nil, ErrCannotParseIPAddress(ipRaw)
}
//AddHostsFileLine add the given ip/fqdn/comment pair, cleanup is done for previous entry.
// it returns the index of the edited (created) line and a pointer to the hostsfileline object.
// error is not nil if something goes wrong
func (h *HostsFile) AddHostsFileLine(ipRaw, fqdnRaw, comment string) (int, *HostsFileLine, error) {
// hostname to lowercase
hostname := strings.ToLower(fqdnRaw)
// parse ip to net.IP
ip := net.ParseIP(ipRaw)
// if we have a valid IP
if ip != nil {
//check if we alredy have the fqdn
if idx, addr, err := h.LookupByHostname(hostname); err == nil {
//if actual ip is the same as the given one, we are done
if net.IP.Equal(addr, ip) {
// handle comment
if comment != "" {
// just replace the current comment with the new one
h.HostsFileLines[idx].Comment = comment
}
return idx, &h.HostsFileLines[idx], nil
}
//if address is different, we need to remove the hostname from the previous entry
for hostIdx, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
if len(h.HostsFileLines[idx].Hostnames) > 1 {
h.Lock()
h.HostsFileLines[idx].Hostnames = append(h.HostsFileLines[idx].Hostnames[:hostIdx], h.HostsFileLines[idx].Hostnames[hostIdx+1:]...)
h.Unlock()
}
//remove the line if there are no more hostnames (other than the actual one)
if len(h.HostsFileLines[idx].Hostnames) <= 1 {
h.RemoveHostsFileLineByRow(idx)
}
}
}
}
//if we alredy have the address, just add the hostname to that line
for idx, hfl := range h.HostsFileLines {
if net.IP.Equal(hfl.Address, ip) {
h.Lock()
h.HostsFileLines[idx].Hostnames = append(h.HostsFileLines[idx].Hostnames, hostname)
h.Unlock()
// handle comment
if comment != "" {
// just replace the current comment with the new one
h.HostsFileLines[idx].Comment = comment
}
// return edited entry
return idx, &h.HostsFileLines[idx], nil
}
}
// at this point we need to create new host line
hfl := HostsFileLine{
Type: LineTypeAddress,
Address: ip,
Hostnames: []string{hostname},
Comment: comment,
IsCommented: false,
}
// generate raw version of the line
hfl.Raw = lineFormatter(hfl)
// append to hosts
h.HostsFileLines = append(h.HostsFileLines, hfl)
// get index
idx := len(h.HostsFileLines) - 1
// return created entry
return idx, &h.HostsFileLines[idx], nil
}
// return error
return -1, nil, ErrCannotParseIPAddress(ipRaw)
}
//AddCommentFileLine adds a new line of type comment with the given comment.
// it returns the index of the edited (created) line and a pointer to the hostsfileline object.
// error is not nil if something goes wrong
func (h *HostsFile) AddCommentFileLine(comment string) (int, *HostsFileLine, error) {
h.Lock()
defer h.Unlock()
hfl := HostsFileLine{
Type: LineTypeComment,
Raw: "# " + comment,
Comment: comment,
}
hfl.Raw = lineFormatter(hfl)
h.HostsFileLines = append(h.HostsFileLines, hfl)
idx := len(h.HostsFileLines) - 1
return idx, &h.HostsFileLines[idx], nil
}
//AddEmptyFileLine adds a new line of type empty.
// it returns the index of the edited (created) line and a pointer to the hostsfileline object.
// error is not nil if something goes wrong
func (h *HostsFile) AddEmptyFileLine() (int, *HostsFileLine, error) {
h.Lock()
defer h.Unlock()
hfl := HostsFileLine{
Type: LineTypeEmpty,
Raw: "",
}
h.HostsFileLines = append(h.HostsFileLines, hfl)
idx := len(h.HostsFileLines) - 1
return idx, &h.HostsFileLines[idx], nil
}
//CommentHostsFileLineByRow set the IsCommented bit for the given row to true
func (h *HostsFile) CommentHostsFileLineByRow(row int) error {
h.Lock()
defer h.Unlock()
if len(h.HostsFileLines) > row {
if h.HostsFileLines[row].Type == LineTypeAddress {
if !h.HostsFileLines[row].IsCommented {
h.HostsFileLines[row].IsCommented = true
h.HostsFileLines[row].Raw = h.RenderHostsFileLine(row)
return nil
}
return ErrAlredyCommentedLine
}
return ErrNotAnAddressLine
}
return ErrUnknown
}
//CommentHostsFileLineByIP set the IsCommented bit for the given address to true
func (h *HostsFile) CommentHostsFileLineByIP(ip net.IP) error {
h.Lock()
defer h.Unlock()
for idx := range h.HostsFileLines {
if net.IP.Equal(ip, h.HostsFileLines[idx].Address) {
if !h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = true
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
return nil
}
return ErrAlredyCommentedLine
}
}
return ErrAddressNotFound
}
func (h *HostsFile) CommentHostsFileLinesByIP(ip net.IP) {
h.Lock()
defer h.Unlock()
for idx := range h.HostsFileLines {
if net.IP.Equal(ip, h.HostsFileLines[idx].Address) {
if !h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = true
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
}
}
}
}
//CommentHostsFileLineByAddress set the IsCommented bit for the given address as string to true
func (h *HostsFile) CommentHostsFileLineByAddress(address string) error {
ip := net.ParseIP(address)
return h.CommentHostsFileLineByIP(ip)
}
func (h *HostsFile) CommentHostsFileLinesByAddress(address string) {
ip := net.ParseIP(address)
h.CommentHostsFileLinesByIP(ip)
}
//CommentHostsFileLineByHostname set the IsCommented bit for the given hostname to true
func (h *HostsFile) CommentHostsFileLineByHostname(hostname string) error {
h.Lock()
defer h.Unlock()
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
if !h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = true
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
return nil
}
return ErrAlredyCommentedLine
}
}
}
return ErrHostnameNotFound
}
func (h *HostsFile) CommentHostsFileLinesByHostname(hostname string) {
h.Lock()
defer h.Unlock()
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
if !h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = true
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
}
}
}
}
}
func (h *HostsFile) CommentHostsFileLinesByHostnameAsRegexp(hostname string) {
h.Lock()
defer h.Unlock()
reg := regexp.MustCompile(hostname)
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if reg.MatchString(hn) {
if !h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = true
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
continue
}
}
}
}
}
//UncommentHostsFileLineByRow set the IsCommented bit for the given row to false
func (h *HostsFile) UncommentHostsFileLineByRow(row int) error {
h.Lock()
defer h.Unlock()
if len(h.HostsFileLines) > row {
if h.HostsFileLines[row].Type == LineTypeAddress {
if h.HostsFileLines[row].IsCommented {
h.HostsFileLines[row].IsCommented = false
h.HostsFileLines[row].Raw = h.RenderHostsFileLine(row)
return nil
}
return ErrAlredyUncommentedLine
}
return ErrNotAnAddressLine
}
return ErrUnknown
}
//UncommentHostsFileLineByIP set the IsCommented bit for the given address to false
func (h *HostsFile) UncommentHostsFileLineByIP(ip net.IP) error {
h.Lock()
defer h.Unlock()
for idx, hfl := range h.HostsFileLines {
if net.IP.Equal(ip, hfl.Address) {
if h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = false
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
return nil
}
return ErrAlredyUncommentedLine
}
}
return ErrNotAnAddressLine
}
func (h *HostsFile) UncommentHostsFileLinesByIP(ip net.IP) {
h.Lock()
defer h.Unlock()
for idx := range h.HostsFileLines {
if net.IP.Equal(ip, h.HostsFileLines[idx].Address) {
if h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = false
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
}
}
}
}
//UncommentHostsFileLineByAddress set the IsCommented bit for the given address as string to false
func (h *HostsFile) UncommentHostsFileLineByAddress(address string) error {
ip := net.ParseIP(address)
return h.UncommentHostsFileLineByIP(ip)
}
func (h *HostsFile) UncommentHostsFileLinesByAddress(address string) {
ip := net.ParseIP(address)
h.UncommentHostsFileLinesByIP(ip)
}
//UncommentHostsFileLineByHostname set the IsCommented bit for the given hostname to false
func (h *HostsFile) UncommentHostsFileLineByHostname(hostname string) error {
h.Lock()
defer h.Unlock()
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
if h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = false
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
return nil
}
return ErrAlredyUncommentedLine
}
}
}
return ErrHostnameNotFound
}
func (h *HostsFile) UncommentHostsFileLinesByHostname(hostname string) {
h.Lock()
defer h.Unlock()
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if hn == hostname {
if h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = false
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
}
}
}
}
}
func (h *HostsFile) UncommentHostsFileLinesByHostnameAsRegexp(hostname string) {
h.Lock()
defer h.Unlock()
reg := regexp.MustCompile(hostname)
for idx := range h.HostsFileLines {
for _, hn := range h.HostsFileLines[idx].Hostnames {
if reg.MatchString(hn) {
if h.HostsFileLines[idx].IsCommented {
h.HostsFileLines[idx].IsCommented = false
h.HostsFileLines[idx].Raw = h.RenderHostsFileLine(idx)
continue
}
}
}
}
}
|