fix "modifer" -> "modifier" typo everywhere

proxychain/requestmodifiers/request_wayback_machine.go

@@ -0,0 +1,43 @@
+package requestmodifiers
+
+import (
+	"net/url"
+	"regexp"
+
+	"ladder/proxychain"
+	tx "ladder/proxychain/responsemodifiers"
+)
+
+const waybackUrl string = "https://web.archive.org/web/"
+
+// RequestWaybackMachine modifies a ProxyChain's URL to request the wayback machine (archive.org) version.
+func RequestWaybackMachine() proxychain.RequestModification {
+	return func(chain *proxychain.ProxyChain) error {
+		chain.Request.URL.RawQuery = ""
+		rURL := preventRecursiveWaybackURLs(chain.Request.URL.String())
+		newURLString := waybackUrl + rURL
+		newURL, err := url.Parse(newURLString)
+		if err != nil {
+			return err
+		}
+		chain.Request.URL = newURL
+
+		// cleanup wayback headers
+		script := `["wm-ipp-print", "wm-ipp-base"].forEach(id => { try { document.getElementById(id).remove() } catch{ } })`
+		chain.AddOnceResponseModifications(
+			tx.InjectScriptAfterDOMContentLoaded(script),
+		)
+
+		return nil
+	}
+}
+
+func preventRecursiveWaybackURLs(url string) string {
+	re := regexp.MustCompile(`https:\/\/web\.archive\.org\/web\/\d+\/\*(https?:\/\/.*)`)
+
+	match := re.FindStringSubmatch(url)
+	if match != nil {
+		return match[1]
+	}
+	return url
+}