/
utils.go
181 lines (158 loc) · 4.31 KB
/
utils.go
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
package main
import (
"encoding/json"
"errors"
"fmt"
"github.com/fatih/color"
"log"
"net/url"
"os"
"strings"
"sync"
"time"
)
var (
green = color.New(color.FgGreen)
italic = color.New(color.Italic)
red = color.New(color.FgRed)
)
// removeDuplicates removes ads with same domain from the given list
func removeDuplicates(ads []string) ([]string, error) {
var results []string
seen := make(map[string]struct{})
for _, adURL := range ads {
adURL = normalizeURL(adURL)
parsedURL, err := url.Parse(adURL)
if err != nil {
return nil, err
}
domain := parsedURL.Host
if _, ok := seen[domain]; !ok {
results = append(results, adURL)
seen[domain] = struct{}{}
}
}
return results, nil
}
// normalizeURL normalizes an ad URL by adding "https://" if missing
func normalizeURL(adURL string) string {
if strings.HasPrefix(adURL, "https://") {
return adURL
}
if strings.HasPrefix(adURL, "http://") {
return strings.ReplaceAll(adURL, "http://", "https://")
}
return "https://" + adURL
}
// EncodeString encodes an input string
func EncodeString(input string) string {
return url.QueryEscape(input)
}
// DefangURL prevents a URL from being clickable
func DefangURL(url string) string {
return strings.ReplaceAll(url, ".", "[.]")
}
// ExtractDomainFromURL extracts domain from a URL
func ExtractDomainFromURL(inputURL string) (string, error) {
if !strings.Contains(inputURL, "https") {
inputURL = "https://" + inputURL
}
parsedURL, err := url.Parse(inputURL)
if err != nil {
return "", err
}
host := parsedURL.Host
return strings.TrimPrefix(host, "www."), nil
}
// GetResultAdsFromURLs gets ResultAd list from a list of ads
func GetResultAdsFromURLs(ads []string, keyword string, se string, time time.Time) ([]ResultAd, error) {
var results []ResultAd
uniqueAds, err := removeDuplicates(ads)
if err != nil {
return results, err
}
for _, adLink := range uniqueAds {
domain, err := ExtractDomainFromURL(adLink)
if err != nil {
return nil, errors.New("cannot get domain from following URL: " + adLink)
}
results = append(results, ResultAd{se, keyword, domain, adLink, time})
}
return results, nil
}
// isExpectedDomain checks if the domainAd is in the expectedDomains list
func isExpectedDomain(domainAd string, expectedDomains []string) bool {
for _, domain := range expectedDomains {
if domainAd == domain {
return true
}
}
return false
}
// printExpectedDomain prints the expected domain
func printExpectedDomain(resultAd ResultAd) {
green.Printf("[+] expected domain: ")
if *cleanLinks {
fmt.Printf("%s => %s\n", resultAd.Domain, resultAd.Link)
} else {
fmt.Printf("%s => %s\n", DefangURL(resultAd.Domain), DefangURL(resultAd.Link))
}
}
// printUnexpectedDomain prints the unexpected domain
func printUnexpectedDomain(resultAd ResultAd) {
red.Printf("[!] unexpected domain: ")
if *cleanLinks {
fmt.Printf("%s => %s\n", resultAd.Domain, resultAd.Link)
} else {
fmt.Printf("%s => %s\n", DefangURL(resultAd.Domain), DefangURL(resultAd.Link))
}
}
// export exports results in a file with beautified JSON
func export(filepath string, allAds []ResultAd) error {
// Check if filepath has JSON extension, if not, add it
if !strings.HasSuffix(filepath, ".json") {
filepath += ".json"
}
file, err := os.Create(filepath)
if err != nil {
return err
}
defer file.Close()
encoder := json.NewEncoder(file)
encoder.SetIndent("", " ")
err = encoder.Encode(allAds)
if err != nil {
return err
}
return nil
}
// searchAds searches ads using a specific search engine function
func searchAds(engineFunc func(string, string) ([]string, error), query Query, engineName string, userAgent string) ([]ResultAd, error) {
encoded := EncodeString(query.SearchTerm)
adsFoundChan := make(chan []string, *consumers)
var wg sync.WaitGroup
searchFunc := func(i int) {
defer wg.Done()
ads, err := engineFunc(encoded, userAgent)
if err != nil {
log.Printf("Error searching %s ad: %v", engineName, err)
return
}
adsFoundChan <- ads
}
for i := 0; i < *consumers; i++ {
wg.Add(1)
go searchFunc(i)
}
wg.Wait()
close(adsFoundChan)
adsFound := make([]string, 0)
for ads := range adsFoundChan {
adsFound = append(adsFound, ads...)
}
err, ResultAds := GetResultAdsFromURLs(adsFound, query.SearchTerm, engineName, time.Now())
if err != nil {
return err, nil
}
return nil, ResultAds
}