Upload files to "/"

rezemu.go

@@ -0,0 +1,118 @@
+package main
+
+import (
+	"crypto/sha1"
+	"encoding/base64"
+	"fmt"
+	"io"
+	"math/rand"
+	"net/http"
+	"regexp"
+	"time"
+)
+
+// PopulateKnessetCookies fetches the seed from the given URL, performs the required requests,
+// and populates the provided http.Client's CookieJar with the necessary cookies.
+// Returns the waap_id value if successful, or an error.
+func PopulateKnessetCookies(client *http.Client, url string) (string, error) {
+	resp, err := client.Get(url)
+	if err != nil {
+		return "", fmt.Errorf("error fetching URL: %w", err)
+	}
+	defer resp.Body.Close()
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return "", fmt.Errorf("error reading response body: %w", err)
+	}
+
+	re := `seed":"([^"]+)"` // Extract seed from HTML
+	matches := regexp.MustCompile(re).FindStringSubmatch(string(body))
+	if len(matches) < 2 {
+		return "", fmt.Errorf("seed value not found")
+	}
+	seed := matches[1]
+	final := SeedToFinalValue(seed)
+
+	// Prepare cookie request
+	random32 := generateRandomString(32)
+	cookiePath := "/7060ac19f50208cbb6b45328ef94140a612ee92387e015594234077b4d1e64f1/" + random32
+	zebraKey := "x-zebra-" + generateRandomString(8)
+	req, err := http.NewRequest("GET", "https://main.knesset.gov.il"+cookiePath, nil)
+	if err != nil {
+		return "", fmt.Errorf("error creating cookie request: %w", err)
+	}
+	req.Header.Set(zebraKey, final)
+	resp2, err := client.Do(req)
+	if err != nil {
+		return "", fmt.Errorf("error sending cookie request: %w", err)
+	}
+	defer resp2.Body.Close()
+
+	var waapID string
+	for k, v := range resp2.Header {
+		if k == "Set-Cookie" {
+			for _, cookieStr := range v {
+				re := regexp.MustCompile(`waap_id=([^;]+)`)
+				match := re.FindStringSubmatch(cookieStr)
+				if len(match) > 1 {
+					waapID = match[1]
+				}
+			}
+		}
+	}
+
+	// Optionally, fetch the original page again to ensure cookies are set
+	/*
+		req2, err := http.NewRequest("GET", url, nil)
+		if err != nil {
+			return waapID, fmt.Errorf("error creating second request: %w", err)
+		}
+		if waapID != "" {
+			req2.Header.Set("Cookie", "waap_id="+waapID)
+		}
+		_, err = client.Do(req2)
+		if err != nil {
+			return waapID, fmt.Errorf("error fetching page with cookie: %w", err)
+		}
+	*/
+	return waapID, nil
+}
+
+func SeedToFinalValue(seed string) string {
+	seedWithZero := seed + "0"
+	sha1sum := sha1.Sum([]byte(seedWithZero))
+	sha1hex := fmt.Sprintf("%x", sha1sum)
+	concatData := []string{
+		sha1hex,
+		"0",
+		"-22222222020",
+		"disabled",
+		seed,
+	}
+	joined := ""
+	for i, v := range concatData {
+		if i > 0 {
+			joined += ";$(hash);_xcalc(arguments.calle);"
+		}
+		joined += v
+	}
+	b64 := base64.StdEncoding.EncodeToString([]byte(joined))
+	b64 = regexp.MustCompile("=").ReplaceAllString(b64, "-")
+	return b64
+}
+
+// generateRandomString returns a random string of the given length (default 4)
+func generateRandomString(length ...int) string {
+	l := 4
+	if len(length) > 0 && length[0] > 0 {
+		l = length[0]
+	}
+	chars := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
+	result := make([]byte, l)
+	rand.Seed(time.Now().UnixNano())
+	for i := 0; i < l; i++ {
+		result[i] = chars[rand.Intn(len(chars))]
+	}
+	return string(result)
+}