/
screenshot.go
271 lines (243 loc) · 7.65 KB
/
screenshot.go
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// Command screenshot is a chromedp example demonstrating how to take a
// screenshot of a specific element and of the entire browser viewport.
package screenshot
import (
"bufio"
"context"
"crypto/tls"
"encoding/json"
"fmt"
"log"
"math/rand"
"net/http"
"os"
"slices"
"time"
"github.com/chromedp/chromedp"
"github.com/groundsec/waybackshots/pkg/logger"
"github.com/groundsec/waybackshots/pkg/utils"
)
type WaybackMachineJSON [][]string
type URLRecordInfo struct {
Timestamp string
Digest string
Original string
}
var defaultTimeout = 2
var errorTimeout = 30
var connectionErrors = 0
func extractDigests(recordInfo []URLRecordInfo) []string {
digests := []string{}
for _, record := range recordInfo {
if !slices.Contains(digests, record.Digest) {
digests = append(digests, record.Digest)
}
}
return digests
}
// fullScreenshot takes a screenshot of the entire browser viewport.
//
// Note: chromedp.FullScreenshot overrides the device's emulation settings. Use
// device.Reset to reset the emulation and viewport settings.
func fullScreenshot(urlStr string, quality int, res *[]byte) chromedp.Tasks {
return chromedp.Tasks{
chromedp.Navigate(urlStr),
chromedp.FullScreenshot(res, quality),
}
}
// Worker function to process elements.
func screenshotWorker(url string, record URLRecordInfo, userAgent string, outputDir string) bool {
waybackUrl := fmt.Sprintf("https://web.archive.org/web/%sid_/%s", record.Timestamp, url)
logger.Info(fmt.Sprintf("Processing element: %s\n", waybackUrl))
opts := append(chromedp.DefaultExecAllocatorOptions[:],
chromedp.UserAgent(userAgent),
//chromedp.ProxyServer("http://localhost:8080"),
chromedp.IgnoreCertErrors,
)
ctx, cancel := chromedp.NewExecAllocator(
context.Background(),
opts...,
)
defer cancel()
// Create chromedp context
ctx, cancel = chromedp.NewContext(ctx)
defer cancel()
// capture screenshot of an element
var buf []byte
// capture entire browser viewport, returning png with quality=90
if err := chromedp.Run(ctx, fullScreenshot(waybackUrl, 90, &buf)); err != nil {
logger.Debug(err)
return false
}
// Get the domain from the URL
domain, err := utils.GetDomain(url)
if err != nil {
logger.Fatal(fmt.Sprintf("Unable to obtain domain from url %s", domain))
}
screenshotDir := fmt.Sprintf("%s/waybackshots_%s/%s", outputDir, domain, record.Timestamp)
err = utils.CreateFolderIfNotExist(screenshotDir)
if err != nil {
logger.Fatal(fmt.Sprintf("Unable to create folder %s", screenshotDir))
}
if err := os.WriteFile(fmt.Sprintf("%s/%s_%s.png", screenshotDir, utils.SanitizeFilename(url), record.Digest), buf, 0o644); err != nil {
log.Fatal(err)
}
return true
}
// Fetches and processes data in parallel using worker pool.
func HandleUrl(urlString string, outputDir string) {
if !utils.IsURL(urlString) {
logger.Error(fmt.Sprintf("%s is not a URL", urlString))
return
}
userAgent := utils.UserAgents[rand.Intn(len(utils.UserAgents))]
/*
proxyURLParsed, err := url.Parse("http://localhost:8081")
if err != nil {
fmt.Errorf("invalid proxy URL: %w", err)
return
}
*/
transport := &http.Transport{
//Proxy: http.ProxyURL(proxyURLParsed),
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
client := &http.Client{
Transport: transport,
}
req, err := http.NewRequest("GET", fmt.Sprintf("https://web.archive.org/cdx/search/cdx?url=%s&output=json&fl=timestamp,digest", urlString), nil)
if err != nil {
logger.Error("Unable to create GET request")
return
}
req.Header.Set("User-Agent", userAgent)
resp, err := client.Do(req)
if err != nil {
logger.Error("Error fetching data from Wayback Machine, retry in a little bit")
return
}
defer resp.Body.Close()
var jsonResponse WaybackMachineJSON
err = json.NewDecoder(resp.Body).Decode(&jsonResponse)
if err != nil {
logger.Error(fmt.Sprintf("Error decoding JSON from Wayback Machine: %s\n", err))
return
}
recordData := []URLRecordInfo{}
for i, element := range jsonResponse {
jsonTimestamp := element[0]
jsonDigest := element[1]
if i != 0 && !slices.Contains(extractDigests(recordData), jsonDigest) {
recordData = append(recordData, URLRecordInfo{Timestamp: jsonTimestamp, Digest: jsonDigest})
}
}
for _, record := range recordData {
for {
screenshotCompleted := screenshotWorker(urlString, record, userAgent, outputDir)
if screenshotCompleted {
connectionErrors = 0
time.Sleep(time.Duration(defaultTimeout) * time.Second)
break
} else {
connectionErrors += 1
logger.Error(fmt.Sprintf("Connection error on URL '%s' with digest %s, waiting for %d seconds", urlString, record.Digest, connectionErrors*errorTimeout))
time.Sleep(time.Duration(connectionErrors*errorTimeout) * time.Second)
}
}
}
fmt.Printf("Wayback Machine screenshots completed for URL %s\n", urlString)
}
func handleDomain(domain string, urlStrings []string, outputDir string) {
userAgent := utils.UserAgents[rand.Intn(len(utils.UserAgents))]
/*
proxyURLParsed, err := url.Parse("http://localhost:8081")
if err != nil {
fmt.Errorf("invalid proxy URL: %w", err)
return
}
*/
transport := &http.Transport{
//Proxy: http.ProxyURL(proxyURLParsed),
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}
client := &http.Client{
Transport: transport,
}
req, err := http.NewRequest("GET", fmt.Sprintf("https://web.archive.org/cdx/search/cdx?url=%s/*&output=json&fl=original,timestamp,digest", domain), nil)
if err != nil {
logger.Error("Unable to create GET request")
return
}
req.Header.Set("User-Agent", userAgent)
resp, err := client.Do(req)
if err != nil {
logger.Error("Error fetching data from Wayback Machine, retry in a little bit")
return
}
defer resp.Body.Close()
var jsonResponse WaybackMachineJSON
err = json.NewDecoder(resp.Body).Decode(&jsonResponse)
if err != nil {
logger.Error(fmt.Sprintf("Error decoding JSON from Wayback Machine: %s\n", err))
return
}
for _, urlString := range urlStrings {
recordData := []URLRecordInfo{}
for i, element := range jsonResponse {
jsonOriginal := element[0]
jsonTimestamp := element[1]
jsonDigest := element[2]
if i != 0 && !slices.Contains(extractDigests(recordData), jsonDigest) && urlString == jsonOriginal {
recordData = append(recordData, URLRecordInfo{Timestamp: jsonTimestamp, Digest: jsonTimestamp})
}
}
for _, record := range recordData {
screenshotCompleted := screenshotWorker(urlString, record, userAgent, outputDir)
if screenshotCompleted {
connectionErrors = 0
time.Sleep(time.Duration(defaultTimeout) * time.Second)
break
} else {
connectionErrors += 1
logger.Error(fmt.Sprintf("Connection error on URL '%s' with digest %s, waiting for %d seconds", urlString, record.Digest, connectionErrors*errorTimeout))
time.Sleep(time.Duration(connectionErrors*errorTimeout) * time.Second)
}
}
}
}
func HandleFile(file string, outputDir string) {
f, err := os.Open(file)
if err != nil {
logger.Fatal("Error opening file:", err)
return
}
defer f.Close()
scanner := bufio.NewScanner(f)
domainURLs := make(map[string][]string)
for scanner.Scan() {
lineStr := scanner.Text()
if !utils.IsURL(lineStr) {
logger.Error(fmt.Sprintf("Line '%s' is not a valid URL", lineStr))
continue
}
domain, err := utils.GetDomain(lineStr)
if err != nil {
continue
}
if _, exists := domainURLs[domain]; !exists {
domainURLs[domain] = []string{}
}
domainURLs[domain] = append(domainURLs[domain], lineStr)
}
for domain, values := range domainURLs {
handleDomain(domain, values, outputDir)
}
if err := scanner.Err(); err != nil {
logger.Fatal("Error reading file:", err)
}
fmt.Printf("Wayback Machine screenshots completed for file %s\n", file)
}