add localstorage clearer, sessionstorage cleaer, and cachebuster modifiers

proxychain/responsemodifiers/delete_localstorage_data.go

@@ -0,0 +1,28 @@
+package responsemodifiers
+
+import (
+	_ "embed"
+	"strings"
+
+	"ladder/proxychain"
+)
+
+// DeleteLocalStorageData deletes localstorage cookies.
+// If the page works once in a fresh incognito window, but fails
+// for subsequent loads, try this response modifier alongside
+// DeleteSessionStorageData and DeleteIncomingCookies
+func DeleteLocalStorageData() proxychain.ResponseModification {
+	return func(chain *proxychain.ProxyChain) error {
+		// don't add rewriter if it's not even html
+		ct := chain.Response.Header.Get("content-type")
+		if !strings.HasPrefix(ct, "text/html") {
+			return nil
+		}
+
+		chain.AddOnceResponseModifications(
+			InjectScriptBeforeDOMContentLoaded(`window.sessionStorage.clear()`),
+			InjectScriptAfterDOMContentLoaded(`window.sessionStorage.clear()`),
+		)
+		return nil
+	}
+}

proxychain/responsemodifiers/delete_sessionstorage_data.go

@@ -0,0 +1,28 @@
+package responsemodifiers
+
+import (
+	_ "embed"
+	"strings"
+
+	"ladder/proxychain"
+)
+
+// DeleteSessionStorageData deletes localstorage cookies.
+// If the page works once in a fresh incognito window, but fails
+// for subsequent loads, try this response modifier alongside
+// DeleteLocalStorageData and DeleteIncomingCookies
+func DeleteSessionStorageData() proxychain.ResponseModification {
+	return func(chain *proxychain.ProxyChain) error {
+		// don't add rewriter if it's not even html
+		ct := chain.Response.Header.Get("content-type")
+		if !strings.HasPrefix(ct, "text/html") {
+			return nil
+		}
+
+		chain.AddOnceResponseModifications(
+			InjectScriptBeforeDOMContentLoaded(`window.sessionStorage.clear()`),
+			InjectScriptAfterDOMContentLoaded(`window.sessionStorage.clear()`),
+		)
+		return nil
+	}
+}

proxychain/responsemodifiers/modify_incoming_cookies.go

@@ -13,8 +13,12 @@ import (
 // DeleteIncomingCookies prevents ALL cookies from being sent from the proxy server
 // back down to the client.
 func DeleteIncomingCookies(_ ...string) proxychain.ResponseModification {
-	return func(px *proxychain.ProxyChain) error {
-		px.Response.Header.Del("Set-Cookie")
+	return func(chain *proxychain.ProxyChain) error {
+		chain.Response.Header.Del("Set-Cookie")
+		chain.AddOnceResponseModifications(
+			InjectScriptBeforeDOMContentLoaded(`document.cookie = ""`),
+			InjectScriptAfterDOMContentLoaded(`document.cookie = ""`),
+		)
 		return nil
 	}
 }