fix: apply WAF plugin team fixes — Host header, chunked encoding, no redirect follow

- nginx.conf: restore proxy_set_header for Host, X-Real-IP, X-Forwarded-For
- tap-proxy: preserve Host header, handle chunked POST, don't follow redirects
- Credits: zoraxy-waf plugin team

sources/python/main.py

@@ -103,7 +103,10 @@ server {{
 
     location / {{
         proxy_pass http://{upstream};
-        # Headers pass through from ingress controller — no overwrite
+        proxy_set_header Host $http_host;
+        proxy_set_header X-Real-IP $remote_addr;
+        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+        proxy_set_header X-Forwarded-Proto $scheme;
     }}
 }}
 """)

sources/python/tap-proxy.py

@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 """Tap Proxy — logs HTTP headers. Usage: python3 tap-proxy.py <port> <backend_host:port> <log_dir>"""
-import http.server, urllib.request, sys
+import http.server, urllib.request, sys, socket
 from datetime import datetime
 
 PORT = int(sys.argv[1]) if len(sys.argv) > 1 else 8081
@@ -8,6 +8,18 @@ BACKEND = sys.argv[2] if len(sys.argv) > 2 else "127.0.0.1:80"
 LOG = (sys.argv[3] if len(sys.argv) > 3 else "/tmp") + "/tap-" + datetime.now().strftime("%Y%m%d-%H%M%S") + ".log"
 BACKEND_URL = "http://" + BACKEND
 
+# Don't follow redirects — preserve Set-Cookie
+class NoRedirect(urllib.request.HTTPRedirectHandler):
+    def http_error_302(self, req, fp, code, msg, headers):
+        fp.status, fp.reason = code, msg
+        return fp
+    http_error_301 = http_error_302
+    http_error_303 = http_error_302
+    http_error_307 = http_error_302
+    http_error_308 = http_error_302
+
+_opener = urllib.request.build_opener(NoRedirect)
+
 class Tap(http.server.BaseHTTPRequestHandler):
     def do_GET(self): self._tap('GET')
     def do_POST(self): self._tap('POST')
@@ -21,15 +33,34 @@ class Tap(http.server.BaseHTTPRequestHandler):
         for k, v in sorted(self.headers.items()):
             msg += "  " + k + ": " + v + "\n"
         
-        body = self.rfile.read(int(self.headers.get('Content-Length', 0))) if 'Content-Length' in self.headers else None
+        # Handle chunked transfer-encoding
+        body = None
+        cl = self.headers.get('Content-Length')
+        te = self.headers.get('Transfer-Encoding', '').lower()
+        if cl:
+            body = self.rfile.read(int(cl))
+        elif 'chunked' in te:
+            body = b''
+            while True:
+                line = self.rfile.readline().strip()
+                if not line: continue
+                size = int(line, 16)
+                if size == 0: break
+                body += self.rfile.read(size)
+                self.rfile.readline()
+            while True:
+                line = self.rfile.readline().strip()
+                if not line: break
+        
         req = urllib.request.Request(BACKEND_URL + self.path, data=body, method=method)
+        # Pass through all headers including Host
         for k, v in self.headers.items():
-            if k.lower() not in ('host', 'connection'):
+            if k.lower() not in ('connection',):
                 req.add_header(k, v)
         
         try:
-            resp = urllib.request.urlopen(req, timeout=30)
-            msg += "\nRESPONSE: " + str(resp.status) + "\n"
+            resp = _opener.open(req, timeout=30)
+            msg += "\nRESPONSE: " + str(resp.status) + " " + str(resp.reason) + "\n"
             for k, v in resp.getheaders():
                 msg += "  " + k + ": " + v + "\n"
             self.send_response(resp.status)