feat(endpoints): Added new endpoints #16
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,156 @@ | ||
| package handlers | ||
|
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| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "math" | ||
| "net/http" | ||
| "net/url" | ||
| "strconv" | ||
| "time" | ||
| ) | ||
|
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||
| const archiveAPIURL = "https://web.archive.org/cdx/search/cdx" | ||
|
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| func convertTimestampToDate(timestamp string) (time.Time, error) { | ||
| mask := "20060102150405" | ||
| return time.Parse(mask, timestamp) | ||
| } | ||
|
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| func countPageChanges(results [][]string) int { | ||
| prevDigest := "" | ||
| changeCount := -1 | ||
| for _, curr := range results { | ||
| if curr[2] != prevDigest { | ||
| prevDigest = curr[2] | ||
| changeCount++ | ||
| } | ||
| } | ||
| return changeCount | ||
| } | ||
|
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| func getAveragePageSize(scans [][]string) int { | ||
| totalSize := 0 | ||
| for _, scan := range scans { | ||
| size, err := strconv.Atoi(scan[3]) | ||
| if err != nil { | ||
| continue | ||
| } | ||
| totalSize += size | ||
| } | ||
| return totalSize / len(scans) | ||
| } | ||
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| func getScanFrequency(firstScan, lastScan time.Time, totalScans, changeCount int) map[string]string { | ||
| formatToTwoDecimal := func(num float64) string { | ||
| return fmt.Sprintf("%.2f", num) | ||
| } | ||
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| dayFactor := lastScan.Sub(firstScan).Hours() / 24 | ||
| daysBetweenScans := formatToTwoDecimal(dayFactor / float64(totalScans)) | ||
| daysBetweenChanges := formatToTwoDecimal(dayFactor / float64(changeCount)) | ||
| scansPerDay := formatToTwoDecimal(float64(totalScans-1) / dayFactor) | ||
| changesPerDay := formatToTwoDecimal(float64(changeCount) / dayFactor) | ||
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| if math.IsNaN(dayFactor / float64(totalScans)) { | ||
| daysBetweenScans = "0.00" | ||
| } | ||
| if math.IsNaN(dayFactor / float64(changeCount)) { | ||
| daysBetweenChanges = "0.00" | ||
| } | ||
| if math.IsNaN(float64(totalScans-1) / dayFactor) { | ||
| scansPerDay = "0.00" | ||
| } | ||
| if math.IsNaN(float64(changeCount) / dayFactor) { | ||
| changesPerDay = "0.00" | ||
| } | ||
|
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| return map[string]string{ | ||
| "daysBetweenScans": daysBetweenScans, | ||
| "daysBetweenChanges": daysBetweenChanges, | ||
| "scansPerDay": scansPerDay, | ||
| "changesPerDay": changesPerDay, | ||
| } | ||
| } | ||
|
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| func getWaybackData(url *url.URL) (map[string]interface{}, error) { | ||
| cdxUrl := fmt.Sprintf("%s?url=%s&output=json&fl=timestamp,statuscode,digest,length,offset", archiveAPIURL, url) | ||
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| client := http.Client{ | ||
| Timeout: 60 * time.Second, | ||
| } | ||
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| resp, err := client.Get(cdxUrl) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| defer resp.Body.Close() | ||
|
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| var data [][]string | ||
| err = json.NewDecoder(resp.Body).Decode(&data) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
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| if len(data) <= 1 { | ||
| return map[string]interface{}{ | ||
| "skipped": "Site has never before been archived via the Wayback Machine", | ||
| }, nil | ||
| } | ||
|
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| if len(data) < 1 { | ||
| return nil, fmt.Errorf("data slice is empty") | ||
| } | ||
|
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| // Remove the header row | ||
| data = data[1:] | ||
|
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| if len(data) < 1 { | ||
| return nil, fmt.Errorf("data slice became empty after removing the first element") | ||
| } | ||
|
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| // Access the first element of the remaining data | ||
| firstScan, err := convertTimestampToDate(data[0][0]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| lastScan, err := convertTimestampToDate(data[len(data)-1][0]) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| totalScans := len(data) | ||
| changeCount := countPageChanges(data) | ||
|
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| return map[string]interface{}{ | ||
| "firstScan": firstScan.Format(time.RFC3339), | ||
| "lastScan": lastScan.Format(time.RFC3339), | ||
| "totalScans": totalScans, | ||
| "changeCount": changeCount, | ||
| "averagePageSize": getAveragePageSize(data), | ||
| "scanFrequency": getScanFrequency(firstScan, lastScan, totalScans, changeCount), | ||
| "scans": data, | ||
| "scanUrl": url, | ||
| }, nil | ||
| } | ||
|
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| func HandleArchives() http.Handler { | ||
| return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| rawURL, err := extractURL(r) | ||
| if err != nil { | ||
| JSONError(w, ErrMissingURLParameter, http.StatusBadRequest) | ||
| return | ||
| } | ||
|
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| data, err := getWaybackData(rawURL) | ||
| if err != nil { | ||
| http.Error(w, fmt.Sprintf("Error fetching Wayback data: %v", err), http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
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| w.Header().Set("Content-Type", "application/json") | ||
| err = json.NewEncoder(w).Encode(data) | ||
| if err != nil { | ||
| http.Error(w, fmt.Sprintf("Error encoding response: %v", err), http.StatusInternalServerError) | ||
| } | ||
| }) | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,142 @@ | ||
| package handlers | ||
|
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||
| import ( | ||
| "net/http" | ||
| "strings" | ||
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| "github.com/miekg/dns" | ||
| ) | ||
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| func ResolveMx(domain string) ([]*dns.MX, int, error) { | ||
| c := new(dns.Client) | ||
| m := new(dns.Msg) | ||
| m.SetQuestion(dns.Fqdn(domain), dns.TypeMX) | ||
| r, _, err := c.Exchange(m, "8.8.8.8:53") | ||
| if err != nil { | ||
| return nil, dns.RcodeServerFailure, err | ||
| } | ||
| if r.Rcode != dns.RcodeSuccess { | ||
| return nil, r.Rcode, &dns.Error{} | ||
| } | ||
| var mxRecords []*dns.MX | ||
| for _, ans := range r.Answer { | ||
| if mx, ok := ans.(*dns.MX); ok { | ||
| mxRecords = append(mxRecords, mx) | ||
| } | ||
| } | ||
| if len(mxRecords) == 0 { | ||
| return nil, dns.RcodeNameError, nil | ||
| } | ||
| return mxRecords, dns.RcodeSuccess, nil | ||
| } | ||
|
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| func ResolveTxt(domain string) ([]string, int, error) { | ||
| c := new(dns.Client) | ||
| m := new(dns.Msg) | ||
| m.SetQuestion(dns.Fqdn(domain), dns.TypeTXT) | ||
| r, _, err := c.Exchange(m, "8.8.8.8:53") | ||
| if err != nil { | ||
| return nil, dns.RcodeServerFailure, err | ||
| } | ||
| if r.Rcode != dns.RcodeSuccess { | ||
| return nil, r.Rcode, &dns.Error{} | ||
| } | ||
| var txtRecords []string | ||
| for _, ans := range r.Answer { | ||
| if txt, ok := ans.(*dns.TXT); ok { | ||
| txtRecords = append(txtRecords, txt.Txt...) | ||
| } | ||
| } | ||
| if len(txtRecords) == 0 { | ||
| return nil, dns.RcodeNameError, nil | ||
| } | ||
| return txtRecords, dns.RcodeSuccess, nil | ||
| } | ||
|
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| func HandleMailConfig() http.Handler { | ||
| return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { | ||
| rawURL, err := extractURL(r) | ||
| if err != nil { | ||
| JSONError(w, ErrMissingURLParameter, http.StatusBadRequest) | ||
| return | ||
| } | ||
|
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| mxRecords, rcode, err := ResolveMx(rawURL.Hostname()) | ||
| if err != nil { | ||
| JSONError(w, err, http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
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| if rcode == dns.RcodeNameError || rcode == dns.RcodeServerFailure { | ||
| JSON(w, map[string]string{"skipped": "No mail server in use on this domain"}, http.StatusOK) | ||
| return | ||
| } | ||
|
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| txtRecords, rcode, err := ResolveTxt(rawURL.Hostname()) | ||
| if err != nil { | ||
| JSONError(w, err, http.StatusInternalServerError) | ||
| return | ||
| } | ||
|
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| if rcode == dns.RcodeNameError || rcode == dns.RcodeServerFailure { | ||
| JSON(w, map[string]string{"skipped": "No mail server in use on this domain"}, http.StatusOK) | ||
| return | ||
| } | ||
|
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| emailTxtRecords := filterEmailTxtRecords(txtRecords) | ||
| mailServices := identifyMailServices(emailTxtRecords, mxRecords) | ||
|
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| JSON(w, map[string]interface{}{ | ||
| "mxRecords": mxRecords, | ||
| "txtRecords": emailTxtRecords, | ||
| "mailServices": mailServices, | ||
| }, http.StatusOK) | ||
| }) | ||
| } | ||
|
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| func filterEmailTxtRecords(records []string) []string { | ||
| var emailTxtRecords []string | ||
| for _, record := range records { | ||
| if strings.HasPrefix(record, "v=spf1") || | ||
| strings.HasPrefix(record, "v=DKIM1") || | ||
| strings.HasPrefix(record, "v=DMARC1") || | ||
| strings.HasPrefix(record, "protonmail-verification=") || | ||
| strings.HasPrefix(record, "google-site-verification=") || | ||
| strings.HasPrefix(record, "MS=") || | ||
| strings.HasPrefix(record, "zoho-verification=") || | ||
| strings.HasPrefix(record, "titan-verification=") || | ||
| strings.Contains(record, "bluehost.com") { | ||
| emailTxtRecords = append(emailTxtRecords, record) | ||
| } | ||
| } | ||
| return emailTxtRecords | ||
| } | ||
|
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| func identifyMailServices(emailTxtRecords []string, mxRecords []*dns.MX) []map[string]string { | ||
| var mailServices []map[string]string | ||
| for _, record := range emailTxtRecords { | ||
| if strings.HasPrefix(record, "protonmail-verification=") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "ProtonMail", "value": strings.Split(record, "=")[1]}) | ||
| } else if strings.HasPrefix(record, "google-site-verification=") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "Google Workspace", "value": strings.Split(record, "=")[1]}) | ||
| } else if strings.HasPrefix(record, "MS=") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "Microsoft 365", "value": strings.Split(record, "=")[1]}) | ||
| } else if strings.HasPrefix(record, "zoho-verification=") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "Zoho", "value": strings.Split(record, "=")[1]}) | ||
| } else if strings.HasPrefix(record, "titan-verification=") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "Titan", "value": strings.Split(record, "=")[1]}) | ||
| } else if strings.Contains(record, "bluehost.com") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "BlueHost", "value": record}) | ||
| } | ||
| } | ||
|
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| for _, mx := range mxRecords { | ||
| if strings.Contains(mx.Mx, "yahoodns.net") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "Yahoo", "value": mx.Mx}) | ||
| } else if strings.Contains(mx.Mx, "mimecast.com") { | ||
| mailServices = append(mailServices, map[string]string{"provider": "Mimecast", "value": mx.Mx}) | ||
| } | ||
| } | ||
|
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| return mailServices | ||
| } | ||
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Do we need to do a length check, before accessing
data[0]anddata[len(data)-1]to avoid potential panics?