wip

proxychain/requestmodifers/modify_outgoing_cookies.go

@@ -2,20 +2,76 @@ package requestmodifers
 
 import (
 	"ladder/proxychain"
+	"net/http"
 )
 
-// BlockOutgoingCookies prevents ALL cookies from being sent from the client
-// to the upstream proxy server.
-func BlockOutgoingCookies() proxychain.RequestModification {
+// SetOutgoingCookie modifes a specific cookie name
+// by modifying the request cookie headers going to the upstream server.
+// If the cookie name does not already exist, it is created.
+func SetOutgoingCookie(name string, val string) proxychain.RequestModification {
+	return func(chain *proxychain.ProxyChain) error {
+		cookies := chain.Request.Cookies()
+		hasCookie := false
+		for _, cookie := range cookies {
+			if cookie.Name != name {
+				continue
+			}
+			hasCookie = true
+			cookie.Value = val
+		}
+
+		if hasCookie {
+			return nil
+		}
+
+		chain.Request.AddCookie(&http.Cookie{
+			Domain: chain.Request.URL.Host,
+			Name:   name,
+			Value:  val,
+		})
+
+		return nil
+	}
+}
+
+// SetOutgoingCookies modifies a client request's cookie header
+// to a raw Cookie string, overwriting existing cookies
+func SetOutgoingCookies(cookies string) proxychain.RequestModification {
+	return func(chain *proxychain.ProxyChain) error {
+		chain.Request.Header.Set("Cookies", cookies)
+		return nil
+	}
+}
+
+// DeleteOutgoingCookie modifies the http request's cookies header to
+// delete a specific request cookie going to the upstream server.
+// If the cookie does not exist, it does not do anything.
+func DeleteOutgoingCookie(name string) proxychain.RequestModification {
+	return func(chain *proxychain.ProxyChain) error {
+		cookies := chain.Request.Cookies()
+		chain.Request.Header.Del("Cookies")
+
+		for _, cookie := range cookies {
+			if cookie.Name == name {
+				chain.Request.AddCookie(cookie)
+			}
+		}
+		return nil
+	}
+}
+
+// DeleteOutgoingCookies removes the cookie header entirely,
+// preventing any cookies from reaching the upstream server.
+func DeleteOutgoingCookies() proxychain.RequestModification {
 	return func(px *proxychain.ProxyChain) error {
 		px.Request.Header.Del("Cookie")
 		return nil
 	}
 }
 
-// BlockOutgoingCookiesExcept prevents non-whitelisted cookies from being sent from the client
+// DeleteOutGoingCookiesExcept prevents non-whitelisted cookies from being sent from the client
 // to the upstream proxy server. Cookies whose names are in the whitelist are not removed.
-func BlockOutgoingCookiesExcept(whitelist ...string) proxychain.RequestModification {
+func DeleteOutgoingCookiesExcept(whitelist ...string) proxychain.RequestModification {
 	return func(px *proxychain.ProxyChain) error {
 		// Convert whitelist slice to a map for efficient lookups
 		whitelistMap := make(map[string]struct{})