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gocrawler.go
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package main
import (
"crypto/tls"
"encoding/json"
"flag"
"fmt"
"io/ioutil"
"net/http"
"net/url"
"os"
"regexp"
"runtime"
"strconv"
"strings"
"sync"
"time"
"github.com/PuerkitoBio/goquery"
"github.com/jroimartin/gocui"
)
// Metadata
var VERSION = "0.1.2"
var STATUS_LINE_NAME = fmt.Sprintf("[gocrawler/v%s]", VERSION)
// Options structure
type Options struct {
Robots bool
Sitemap bool
WayBack bool
IgnoreInvalidSSL bool
Thread int
Timeout int
Delay int
Depth int
MaxRegexResult int
URL string
Proxy string
RegexString string
Regex *regexp.Regexp
URLExclude string
URLExcludeRegex *regexp.Regexp
StatusCodeExclude string
StatusCodeRegex *regexp.Regexp
InScopeExclude string
Scheme string
Headers string
Query string
Keys []string
InScopeDomains []string
}
// Output result structure
type Results struct {
Pages string
PageByURL map[string]string
URLs map[string]bool
OutScopeURLs map[string]bool
QueryURLs map[string]bool
CSS map[string]bool
Scripts map[string]bool
CDNs map[string]bool
Medias map[string]bool
Emails map[string]bool
Phones map[string]bool
Networks map[string]bool
Comments map[string]bool
HostNames []string
RegMaches map[string][]string
}
// Program definitions
type def struct {
currentPage string
currentPageIndex int
Gui *gocui.Gui
}
// CUI View Attributes
type viewAttrs struct {
editor gocui.Editor
editable bool
frame bool
text string
title string
wrap bool
x0 func(int) int
y0 func(int) int
x1 func(int) int
y1 func(int) int
}
// Search prompt editor struct type
type searchEditor struct {
editor gocui.Editor
}
// URL editor struct type
type singleLineEditor struct {
editor gocui.Editor
}
// RESPONSE editor struct type
type responseEditor struct {
editor gocui.Editor
}
var (
// Initial OPTIONS
OPTIONS = &Options{}
// To identify media postfixes
MEDIA_POSTFIX = []string{"aa", "aac", "aif", "aiff", "amr", "amv", "amz", "ape", "asc", "asf", "au", "bash", "bat", "bmp", "c",
"cfa", "chm", "cpp", "cs", "csv", "doc", "docx", "dmg", "f4a", "f4b", "f4p", "f4v", "flac", "flv", "gif", "gif", "gifv",
"go", "gz", "ico", "java", "jfif", "jpeg", "jpg", "m2v", "m4a", "m4p", "m4v", "md", "mkv", "mng", "mov",
"mp2", "mp3", "mp4", "mpeg", "mpg", "mpv", "msi", "pdf", "pl", "png", "ppt", "pptx", "py", "rar", "rm", "roq",
"svg", "svi", "tar.gz", "tiff", "vmo", "vob", "w64", "wav", "webm", "wma", "wmv", "woff2", "wrk",
"wvavi", "xlsx", "xz", "yaml", "yml", "zip", "7z", "tgz", "exe", "psd"}
// Scheme://hostname.tld
BASEURL = ""
// Project Name: Hostname.tld
PROJECT_NAME = ""
VIEWS = []string{"URL", "OPTIONS", "HEADERS", "QUERY", "REGEX", "RESPONSE", "SEARCH_PROMPT"}
ALL_VIEWS = []string{"URL", "OPTIONS", "HEADERS", "QUERY", "REGEX", "RESPONSE", "SEARCH", "STATUS_LINE", "SEARCH_PROMPT"}
// Pre-define keys
ALL_KEYS = []string{"email", "url", "query_urls", "all_urls", "phone", "media", "css", "script", "cdn", "comment", "dns", "network", "all"}
MIN_X = 60
MIN_Y = 20
VIEWS_OBJ map[string]*gocui.View
VIEWS_ATTRS = map[string]viewAttrs{}
PROG def
DEPTH = 1
TOKENS chan struct{}
RESULTS *Results
START_TIME time.Time
MUTEX = &sync.Mutex{}
)
// Find comments with regex
func findComments() {
reg := regexp.MustCompile(`<!--.*?-->`)
for _, v := range reg.FindAllString(RESULTS.Pages, -1) {
if !RESULTS.Comments[v] {
RESULTS.Comments[v] = true
}
}
}
// Find emails with regex
func findEmails() {
reg := regexp.MustCompile(`[A-z0-9.\-_]+@[A-z0-9\-\.]{0,255}?` + PROJECT_NAME + `(?:[A-z]+)?`)
founds := reg.FindAllString(RESULTS.Pages, -1)
reg = regexp.MustCompile(`[A-z0-9.\-_]+@[A-z0-9\-.]+\.[A-z]{1,10}`)
for _, v := range reg.FindAllString(RESULTS.Pages, -1) {
if strings.Contains(strings.Split(v, "@")[1], ".") {
founds = append(founds, strings.ToLower(v))
}
}
for _, v := range founds {
v = strings.ToLower(v)
if !RESULTS.Emails[v] && toBool(v) {
RESULTS.Emails[v] = true
}
}
}
// Find project DNS names with regex
func findHostnames() {
reg := regexp.MustCompile(`[A-z0-9\.\-%]+\.` + PROJECT_NAME)
for _, v := range reg.FindAllString(RESULTS.Pages, -1) {
uniq(&RESULTS.HostNames, v)
}
}
// Find social networks with regex
func findNetworks() {
netexp := `(instagram\.com\/[A-z_0-9.\-]{1,30})|(facebook\.com\/[A-z_0-9\-]{2,50})|(fb\.com\/[A-z_0-9\-]{2,50})|(twitter\.com\/[A-z_0-9\-.]{2,40})|(github\.com\/[A-z0-9_-]{1,39})|([A-z0-9_-]{1,39}\.github.(io|com))|(telegram\.me/[A-z_0-9]{5,32})(youtube\.com\/user\/[A-z_0-9\-\.]{2,100})|(linkedin\.com\/company\/[A-z_0-9\.\-]{3,50})|(linkedin\.com\/in\/[A-z_0-9\.\-]{3,50})|(\.?(plus\.google\.com/[A-z0-9_\-.+]{3,255}))|([A-z0-9\-]+\.wordpress\.com)|(reddit\.com/user/[A-z0-9_\-]{3,20})|([A-z0-9\-]{3,32}\.tumblr\.com)|([A-z0-9\-]{3,50}\.blogspot\.com)`
reg := regexp.MustCompile(netexp)
found := reg.FindAllString(RESULTS.Pages, -1)
for _, i := range found {
if !RESULTS.Networks[i] {
RESULTS.Networks[i] = true
}
}
}
// Return true if the URL matched with the urlExclude option
func urlExcluding(uri string) bool {
if OPTIONS.URLExcludeRegex.MatchString(uri) {
return true
}
return false
}
// Return true if the status code matched with the codeExclude option
func statusCodeExcluding(code int) bool {
reg := regexp.MustCompile(OPTIONS.StatusCodeExclude)
if reg.MatchString(strconv.Itoa(code)) {
return true
}
return false
}
// Send the request and gives the source, status code and errors
func request(uri string) (string, int, error) {
client := &http.Client{
Timeout: time.Duration(OPTIONS.Timeout) * time.Second}
Httptransport := &http.Transport{}
if OPTIONS.Proxy != "" {
proxy, er := url.Parse(OPTIONS.Proxy)
if er != nil {
return "", 0, er
}
Httptransport.Proxy = http.ProxyURL(proxy)
}
if OPTIONS.IgnoreInvalidSSL == true {
Httptransport.TLSClientConfig = &tls.Config{InsecureSkipVerify: true}
}
client = &http.Client{Transport: Httptransport}
req, er := http.NewRequest("GET", trim(uri), nil)
if er != nil {
return "", 0, er
}
headers := strings.Split(trim(VIEWS_OBJ["HEADERS"].Buffer()), "\n")
for _, v := range headers {
kv := strings.Split(v, ": ")
kv[0] = strings.Replace(kv[0], " ", "", -1)
req.Header.Set(kv[0], kv[1])
}
resp, er := client.Do(req)
if er != nil {
return "", 0, er
}
defer resp.Body.Close()
Body, er := ioutil.ReadAll(resp.Body)
if er != nil {
return "", 0, er
}
return string(Body), resp.StatusCode, er
}
// Find the archive pages from the web.archive.org and sanitize
// the URLs and return a list of URLs
func crawlWayBackURLs() []string {
// Fetch waybackurls need almost 15s timeout
timeout := OPTIONS.Timeout
OPTIONS.Timeout = 15
text, _, ok := request(fmt.Sprintf("%s://web.archive.org/cdx/search/cdx?url=%s/*&output=json&collapse=urlkey", OPTIONS.Scheme, PROJECT_NAME))
OPTIONS.Timeout = timeout
if ok != nil {
return []string{}
}
var wrapper [][]string
ok = json.Unmarshal([]byte(text), &wrapper)
if ok != nil {
return []string{}
}
var wayURLs []string
var code int
for _, urls := range wrapper[1:] {
code, _ = strconv.Atoi(urls[4])
// Exclude the urls with codeExclude and urlExclude
if statusCodeExcluding(code) && urlExcluding(urls[2]) {
parse, ok := url.Parse(urls[2])
if ok != nil {
continue
}
parse.Host = regexp.MustCompile(`:[\d]+`).ReplaceAllString(parse.Host, "")
marshal, ok := parse.MarshalBinary()
if ok != nil {
continue
}
url := fmt.Sprintf("%s", marshal)
wayURLs = append(wayURLs, strings.ReplaceAll(url, `\/\/`, `//`))
}
}
return wayURLs
}
// Crawling the robots.txt URLs as seed
func crawlRobots() []string {
text, statusCode, ok := request(fmt.Sprintf("%s://%s/robots.txt", OPTIONS.Scheme, PROJECT_NAME))
if ok != nil {
return []string{}
}
if statusCode == 200 {
var reg *regexp.Regexp
makers := []string{}
// It finds all of URLs without any restrict
for _, obj := range [3]string{`Disallow: (.*)?`, `Allow: (.*)?`, `Sitemap: (.*)?`} {
reg = regexp.MustCompile(obj)
for _, link := range [][]string(reg.FindAllStringSubmatch(text, -1)) {
makers = append(makers, string(link[1]))
}
}
return makers
}
return []string{}
}
// Crawling the sitemap.xml URLs as seed
func crawlSitemap() []string {
text, statusCode, ok := request(fmt.Sprintf("%s://%s/sitemap.xml", OPTIONS.Scheme, PROJECT_NAME))
if ok != nil {
return []string{}
}
reg := regexp.MustCompile(`<loc>(.*?)</loc>`)
if statusCode == 200 {
founds := reg.FindAllStringSubmatch(text, -1)
out := []string{}
for _, v := range founds {
out = append(out, v[1])
}
return out
}
return []string{}
}
// Find social networks with regex
func checkPostfix(file string, uri string) bool {
file = strings.ToLower(file)
uri = strings.ToLower(uri)
reg := regexp.MustCompile(`\.` + file + `[^\w]`)
reg2 := regexp.MustCompile(`\.` + file + `[^\w]?$`)
if reg.MatchString(uri) || reg2.MatchString(uri) || strings.HasSuffix(uri, "."+file) {
return true
}
return false
}
// Set view properties
func settingViews() {
VIEWS_ATTRS = map[string]viewAttrs{
"URL": {
editor: &singleLineEditor{gocui.DefaultEditor},
editable: true,
frame: true,
text: OPTIONS.URL,
title: "URL",
wrap: false,
x0: func(x int) int { return x - x },
y0: func(y int) int { return 0 },
x1: func(x int) int { return x - 1 },
y1: func(y int) int { return 2 },
},
"OPTIONS": {
editor: gocui.DefaultEditor,
editable: true,
frame: true,
text: optionsCode(),
title: "Options",
wrap: true,
x0: func(x int) int { return 0 },
y0: func(y int) int { return 2 },
x1: func(x int) int { return x / 2 },
y1: func(y int) int { return (y / 2) / 2 },
},
"HEADERS": {
editor: gocui.DefaultEditor,
editable: true,
frame: true,
text: OPTIONS.Headers,
title: "HTTP Headers",
wrap: true,
x0: func(x int) int { return x / 2 },
y0: func(y int) int { return (y - y) + 2 },
x1: func(x int) int { return x - 1 },
y1: func(y int) int { return (y / 2) / 2 },
},
"QUERY": {
editor: &singleLineEditor{gocui.DefaultEditor},
editable: true,
frame: true,
text: OPTIONS.Query,
title: "Query",
wrap: false,
x0: func(x int) int { return 0 },
y0: func(y int) int { return (y / 2) / 2 },
x1: func(x int) int { return x / 2 },
y1: func(y int) int { return ((y / 2) / 2) + 2 },
},
"REGEX": {
editor: &singleLineEditor{gocui.DefaultEditor},
editable: true,
frame: true,
text: OPTIONS.RegexString,
title: "Regex",
wrap: false,
x0: func(x int) int { return x / 2 },
y0: func(y int) int { return (y / 2) / 2 },
x1: func(x int) int { return x - 1 },
y1: func(y int) int { return ((y / 2) / 2) + 2 },
},
"RESPONSE": {
editor: &responseEditor{gocui.DefaultEditor},
editable: true,
frame: true,
title: "Response",
wrap: true,
x0: func(x int) int { return 0 },
y0: func(y int) int { return (y/2)/2 + 2 },
x1: func(x int) int { return x - 1 },
y1: func(y int) int { return y - 4 },
},
"STATUS_LINE": {
editor: nil,
editable: false,
frame: true,
wrap: true,
text: STATUS_LINE_NAME,
x0: func(x int) int { return 0 },
y0: func(y int) int { return y - 4 },
x1: func(x int) int { return x - 1 },
y1: func(y int) int { return y - 2 },
},
"SEARCH": {
editor: nil,
editable: false,
text: "search>",
frame: false,
wrap: false,
x0: func(x int) int { return 0 },
y0: func(y int) int { return y - 2 },
x1: func(x int) int { return 8 },
y1: func(y int) int { return y },
},
"SEARCH_PROMPT": {
editor: &singleLineEditor{&searchEditor{gocui.DefaultEditor}},
editable: true,
frame: false,
wrap: false,
x0: func(x int) int { return 8 },
y0: func(y int) int { return y - 2 },
x1: func(x int) int { return x - 1 },
y1: func(y int) int { return y },
},
"ERROR": {
editor: nil,
editable: false,
text: "Terminal is too small",
title: "Error",
frame: true,
wrap: false,
x0: func(x int) int { return 0 },
y0: func(y int) int { return 0 },
x1: func(x int) int { return x - 1 },
y1: func(y int) int { return y - 1 },
},
"SAVE": {
editor: &singleLineEditor{gocui.DefaultEditor},
editable: true,
text: "Terminal is too small",
title: "Filename (Enter to submit, Ctrl+q to close)",
frame: true,
wrap: false,
x0: func(x int) int { return (x / 2) / 2 },
y0: func(y int) int { return y/2 - 1 },
x1: func(x int) int { return x - ((x / 2) / 2) },
y1: func(y int) int { return y/2 + 1 },
},
"SAVE_RESULT": {
editor: nil,
editable: false,
title: "Result save(Ctrl+q to close)",
frame: true,
wrap: false,
x0: func(x int) int { return (x / 2) / 2 },
y0: func(y int) int { return (y / 2) + 1 },
x1: func(x int) int { return x - ((x / 2) / 2) },
y1: func(y int) int { return (y / 2) + 3 },
},
"LOADER": {
editor: nil,
editable: false,
text: "Loading...",
frame: true,
wrap: false,
x0: func(x int) int { return (x / 2) - 5 },
y0: func(y int) int { return (y / 2) + 1 },
x1: func(x int) int { return ((x / 2) + 6) },
y1: func(y int) int { return (y / 2) + 3 },
},
}
}
// Put the msg to the Response View concurrently
func putting(v *gocui.View, msg string) {
PROG.Gui.Update(func(_ *gocui.Gui) error {
fmt.Fprintln(v, msg)
return nil
})
}
// Push msg to the Response View
func pushing(msg string) {
fmt.Fprintln(VIEWS_OBJ["RESPONSE"], msg)
}
// Return the difference of the start time to now
func sinceTime() float64 {
return time.Since(START_TIME).Seconds()
}
// Refresh the status line with new value
func refStatusLine(msg string) {
VIEWS_OBJ["STATUS_LINE"].Clear()
putting(VIEWS_OBJ["STATUS_LINE"], STATUS_LINE_NAME+" "+msg)
}
// Show the loading pop-up view
func loading() error {
X, Y := PROG.Gui.Size()
attrs := VIEWS_ATTRS["LOADER"]
if v, err := PROG.Gui.SetView("LOADER", attrs.x0(X), attrs.y0(Y), attrs.x1(X), attrs.y1(Y)); err != nil {
if err != gocui.ErrUnknownView {
return err
}
setViewAttrs(v, attrs)
}
return nil
}
// parseOptions parses the command line flags provided by a user
func parseOptions() {
flag.StringVar(&OPTIONS.URL, "url", "", "URL to crawl for")
flag.IntVar(&OPTIONS.Thread, "thread", 5, "The number of concurrent goroutines for resolving")
flag.IntVar(&OPTIONS.Delay, "delay", 0, "Sleep between each request(Millisecond)")
flag.IntVar(&OPTIONS.Timeout, "timeout", 10, "Seconds to wait before timing out")
flag.IntVar(&OPTIONS.MaxRegexResult, "max-regex", 1000, "Max result of regex search for regex field")
flag.BoolVar(&OPTIONS.Robots, "robots", false, "Scrape robots.txt for URLs and using them as seeds")
flag.BoolVar(&OPTIONS.Sitemap, "sitemap", false, "Scrape sitemap.xml for URLs and using them as seeds")
flag.BoolVar(&OPTIONS.WayBack, "wayback", false, "Scrape WayBackURLs(web.archive.org) for URLs and using them as seeds")
flag.BoolVar(&OPTIONS.IgnoreInvalidSSL, "Ignore-SSL", false, "Ignore invalid SSL")
flag.StringVar(&OPTIONS.Query, "query", "", `Query expression(It could be a file extension(pdf), a key query(url,script,css,..) or a jquery selector($("a[class='hdr']).attr('hdr')")))`)
flag.StringVar(&OPTIONS.Proxy, "proxy", "", "Proxy by scheme://ip:port")
flag.StringVar(&OPTIONS.Headers, "header", "", "HTTP Header for each request(It should to separated fields by \\n). e.g KEY: VALUE\\nKEY1: VALUE1")
flag.StringVar(&OPTIONS.RegexString, "regex", "", "Search the Regular Expression on the pages")
flag.StringVar(&OPTIONS.Scheme, "scheme", "https", "Set the scheme for the requests")
flag.IntVar(&OPTIONS.Depth, "depth", 1, "Scraper depth search level")
flag.StringVar(&OPTIONS.URLExclude, "url-exclude", ".*", "Exclude URLs matching with this regex")
flag.StringVar(&OPTIONS.StatusCodeExclude, "code-exclude", ".*", "Exclude HTTP status code with these codes. Separate whit '|'")
flag.StringVar(&OPTIONS.InScopeExclude, "domain-exclude", "", "Exclude in-scope domains to crawl. Separate with comma | default=root domain")
flag.Parse()
if OPTIONS.URL != "" {
OPTIONS.URL = urlSanitize(OPTIONS.URL)
} else {
OPTIONS.URL = "https://"
}
if !toBool(OPTIONS.Headers) {
OPTIONS.Headers = `User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0`
}
}
// Return the options to the option view as text
func optionsCode() string {
B2S := func(b bool) string {
if b == true {
return "true"
}
return "false"
}
return fmt.Sprintf("thread,depth,delay,timeout,maxRegexResult=%d,%d,%d,%d,%d\nrobots,sitemap,wayback=%s,%s,%s\nurlExclude=%s\ncodeExclude=%s\ndomainExclude=%s\nproxy=%s\nIgnoreInvalidSSL=%s",
OPTIONS.Thread, OPTIONS.Depth, OPTIONS.Delay, OPTIONS.Timeout, OPTIONS.MaxRegexResult,
B2S(OPTIONS.Robots), B2S(OPTIONS.Sitemap), B2S(OPTIONS.WayBack), OPTIONS.URLExclude,
OPTIONS.StatusCodeExclude, OPTIONS.InScopeExclude, OPTIONS.Proxy, B2S(OPTIONS.IgnoreInvalidSSL))
}
// Read the options from the option View and set them
func prepareOptions() string {
S2B := func(v string) bool {
if v == "true" {
return true
}
return false
}
code := trim(VIEWS_OBJ["OPTIONS"].Buffer())
if !toBool(code) {
return "Options are incomplete. Press Ctrl+R to rewrite options."
}
for k, line := range strings.Split(code, "\n") {
split := strings.Split(line, "=")
values := strings.Join(split[1:], "=")
splited := strings.Split(values, ",")
// If count of the variables doesn't match with values
if len(splited) != len(strings.Split(split[0], ",")) {
return "Options are incomplete: All int and bool options must be set. Press Ctrl+R to rewrite options."
}
switch k {
// Set the int variables
case 0:
var k int
var v *int
for k, v = range []*int{&OPTIONS.Thread, &OPTIONS.Depth, &OPTIONS.Delay, &OPTIONS.Timeout, &OPTIONS.MaxRegexResult} {
if i, err := strconv.Atoi(splited[k]); err == nil {
*v = i
} else {
return fmt.Sprintf("Invalid value for type int: %s.", splited[k])
}
}
// Set the boolean variables
case 1:
OPTIONS.Robots, OPTIONS.Sitemap, OPTIONS.WayBack = S2B(splited[0]), S2B(splited[1]), S2B(splited[2])
// Set the urlExclude,.. variables
case 2:
OPTIONS.URLExclude = values
case 3:
OPTIONS.StatusCodeExclude = values
case 4:
OPTIONS.InScopeDomains = strings.Split(values, ",")
case 5:
OPTIONS.Proxy = values
case 6:
OPTIONS.IgnoreInvalidSSL = S2B(values)
}
}
// Prepare the URLs channel for crawl
TOKENS = make(chan struct{}, OPTIONS.Thread)
// Init Headers
OPTIONS.Headers = trim(VIEWS_OBJ["HEADERS"].Buffer())
prepareQuery()
return ""
}
// Split the keys as slice and write to the OPTIONS.Keys
func prepareQuery() {
q := trim(VIEWS_OBJ["QUERY"].Buffer())
if !strings.HasPrefix(q, "$") {
OPTIONS.Keys = strings.Split(q, ",")
} else {
OPTIONS.Query = q
}
}
// Return the false if the arg is blank and true if it isn't.
// Supported types: int, string, bool, []int, []string, []bool
func toBool(arg interface{}) bool {
switch arg.(type) {
case int:
return arg != 0
case string:
return arg != ""
case bool:
return arg == true
case rune:
return true
default:
tostr, ok := arg.([]string)
if ok {
return toBool(len(tostr))
}
toint, ok := arg.([]int)
if ok {
return toBool(len(toint))
}
toflag, ok := arg.([]bool)
if ok {
return toBool(len(toflag))
}
}
return false
}
// Print the slices
func slicePrint(head string, s []string) {
pushing(head)
for v := range s {
pushing(s[v])
}
}
// Print the maps
func mapPrint(head string, m map[string]bool) {
pushing(head)
for k := range m {
pushing(fmt.Sprintf(" %s", k))
}
}
// Search a key to the list and return the true if it is
func sliceSearch(list *[]string, i string) bool {
for _, v := range *list {
if v == i {
return true
}
}
return false
}
// Search the regex on the web pages and show the result on the Response view
func regexSearch() {
loading()
PROG.Gui.Update(func(_ *gocui.Gui) error {
vrb := VIEWS_OBJ["RESPONSE"]
vrb.Clear()
if RESULTS != nil {
for k, v := range RESULTS.PageByURL {
founds := OPTIONS.Regex.FindAllString(v, OPTIONS.MaxRegexResult)
// Print page address and len of results
pushing(fmt.Sprintf(" > %s | %d", k, len(founds)))
if founds != nil {
for _, v := range founds {
pushing(" > " + v)
}
}
}
}
PROG.currentPage = vrb.Buffer()
PROG.Gui.DeleteView("LOADER")
return nil
})
}
// Gives a query($("a").attr("href")) and return the result of query
func parseQuery(query string) ([]string, string) {
query = strings.TrimSpace(query)
// Extract the expressions
syntaxExp := regexp.MustCompile(`^\$\("([^"]+)"\)\.([\w]+)\(("([^"]+)")?\)`).FindAllStringSubmatch(query, 1)
outputResult := []string{}
// Check the syntax of query
if !toBool(len(syntaxExp)) {
return outputResult, "Query: Invalid syntax"
}
query = strings.ReplaceAll(query, syntaxExp[0][0], "")
exprs := syntaxExp[0][1:]
// Check the method names
methods := []string{"html", "text", "attr"}
method := exprs[1]
if !sliceSearch(&methods, method) {
return outputResult, "Query: Invalid method name"
}
// Read the document to parse
doc, err := goquery.NewDocumentFromReader(strings.NewReader(RESULTS.Pages))
if err != nil {
return outputResult, fmt.Sprintf("%s", err)
}
var def func(*goquery.Selection) (string, error)
switch method {
case "text":
def = func(obj *goquery.Selection) (string, error) {
return obj.Text(), nil
}
case "html":
def = func(obj *goquery.Selection) (string, error) {
return obj.Html()
}
case "attr":
def = func(obj *goquery.Selection) (string, error) {
attr, _ := obj.Attr(exprs[3])
return attr, nil
}
}
// Run the query
doc.Find(exprs[0]).Each(func(i int, obj *goquery.Selection) {
rsp, err := def(obj)
if err == nil {
outputResult = append(outputResult, rsp)
}
})
return outputResult, ""
}
// Trim the spaces
func trim(s string) string {
return strings.TrimSpace(s)
}
// If the i is not in the list uniq append i to the slice
func uniq(list *[]string, i string) {
is := true
for _, v := range *list {
if v == i {
is = false
}
}
if is {
*list = append(*list, i)
}
}
// Identify the Out Scope URLs
func isOutScope(host string) bool {
host = strings.ToLower(host)
host = strings.Replace(host, "www.", ".", 1)
sh := strings.Split(strings.ToLower(PROJECT_NAME), ".")
var suffix string
if len(sh) > 1 {
suffix = "." + sh[len(sh)-2] + "." + sh[len(sh)-1]
} else {
suffix = "." + PROJECT_NAME
}
if !strings.HasSuffix(host, suffix) && !sliceSearch(&OPTIONS.InScopeDomains, host) {
return true
}
return false
}
// A URL joiner
func urjoin(baseurl, uri string) string {
urlower := strings.ToLower(uri)
baseurl = strings.ReplaceAll(baseurl, `\/\/`, `//`)
var pos int
for _, v := range []string{" ", "", "/", "#", "http://", "https://"} {
if urlower == v {
return ""
}
}
// remove the spaces
pos = strings.Index(uri, " ")
if pos > -1 {
uri = uri[:pos]
}
// remove the user@.. portion
pos = strings.Index(uri, "@")
if pos > -1 {
uri = uri[:pos]
}
// remove the comments
pos = strings.Index(uri, "#")
if pos > -1 {
uri = uri[:pos]
}
if !strings.HasSuffix(baseurl, "/") {
baseurl = baseurl + "/"
}
if strings.HasPrefix(uri, "://") {
return ""
}
if strings.HasPrefix(uri, "//") {
return baseurl + uri
}
if strings.HasPrefix(uri, "/") {
return baseurl + uri[1:]
}
base, err := url.Parse(baseurl)
if err != nil {
return ""
}
final, err := base.Parse(uri)
if err != nil {
return ""
}
return final.String()
}
// Remove URL scheme and replace it with default scheme and
// removes last slash
func setURLUniq(uri string) string {
// Set Scheme
uri = regexp.MustCompile(`https?://`).ReplaceAllString(uri, OPTIONS.Scheme+"://")
// Remove last slash
uri = regexp.MustCompile(`/$`).ReplaceAllString(uri, "")
return uri
}
// Setting the URL Scheme
func urlSanitize(uri string) string {
u, err := url.Parse(uri)
if err != nil {
// ://name.tld/
uri = OPTIONS.Scheme + uri
u, err = url.Parse(uri)
if err != nil {
return ""
}
}
if u.Scheme == "" {
uri = strings.Replace(uri, "://", "", -1)
uri = fmt.Sprintf("%s://%s", OPTIONS.Scheme, uri) // Default scheme
}
return uri
}
/* Identify the type of URL and sanitize the URLs.
Then it returns the URLs that can be scrape. */
func urlCategory(urls []string) []string {
spool := []string{}
var join string
var broke int
// Sometimes the program is broken with runtime error
// Then we use Mutex to lock the loop to solve the problem
MUTEX.Lock()
defer MUTEX.Unlock()
for _, link := range urls {
// If the URL is nothing or blank
if !toBool(link) {
continue
}
// If the URL is a phone, CDN or email
if addCDN(link) || addPhone(link) || addEmail(link) {
continue
}
join = urjoin(BASEURL, link)
if !toBool(join) || !strings.Contains(join, "://") || !strings.Contains(join, ".") {
continue
}
// Identify the media files
broke = 0
for _, ext := range MEDIA_POSTFIX {
if x := checkPostfix(ext, join); x {
if !RESULTS.Medias[join] {
RESULTS.Medias[join] = true
}
broke = 1
break
}
}
if broke == 1 {
continue
}
// If it is a JavaScript file
if checkPostfix("js", join) {
if !RESULTS.Scripts[join] {
RESULTS.Scripts[join] = true
}
continue
}
// If it is a CSS file
if checkPostfix("css", join) {
if !RESULTS.CSS[join] {
RESULTS.CSS[join] = true
}
continue
}
urparse, err := url.Parse(join)
if err != nil {
continue
}
// If the URL is out from scope
if isOutScope(urparse.Host) {
if !RESULTS.OutScopeURLs[join] {
RESULTS.OutScopeURLs[join] = true
}
continue
}
// Clean the URL
join = setURLUniq(join)
if len(urparse.Query()) > 0 {
RESULTS.QueryURLs[join] = true
}
// Add URL to URLs and output URLs
if !RESULTS.URLs[join] {
RESULTS.URLs[join] = true
}
uniq(&spool, join)
}
return spool
}
// Clean the comments from the page source
func removeComments(text string) string {
reg := regexp.MustCompile(`<!--([\s\S]*?)-->`)
text = reg.ReplaceAllString(text, ``)
return text
}
// Identify the Content Delivery Networks
func addCDN(uri string) bool {
if strings.HasPrefix(uri, "//") && strings.Contains(uri, ".") && len(strings.Split(uri, ".")) >= 2 {
RESULTS.CDNs[uri] = true
return true
}
return false
}
// Identify the Phone numbers
func addPhone(uri string) bool {
if strings.HasPrefix(uri, "tel://") {
RESULTS.Phones[uri[6:]] = true
return true
}
return false
}
// Identify the Email from the URL
func addEmail(uri string) bool {
if strings.HasPrefix(uri, "mailto:") && strings.Contains(uri, "@") {
uri = strings.ToLower(strings.Replace(uri[7:], "//", "", -1))
if strings.Contains(uri, "?") {
uri = strings.Split(uri, "?")[0]
}
RESULTS.Emails[uri] = true
return true
}
return false
}
// Search prompt regex
func responseSearch() error {
vrb := VIEWS_OBJ["RESPONSE"]
vrb.Clear()
expr := strings.TrimSpace(VIEWS_OBJ["SEARCH_PROMPT"].Buffer())
if expr == "" {
pushing(PROG.currentPage)
vrb.Title = VIEWS_ATTRS["RESPONSE"].title
return nil
}
reg, err := regexp.Compile(expr)