From a0c7e319d1c14cccecdb3400da85a33b1c04fc36 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andr=C3=A9=20Lung?= <andrelung@users.noreply.github.com>
Date: Fri, 6 Jun 2025 23:18:27 +0200
Subject: [PATCH] Add visitor IP to bulk POST data by setting cip and
 token_auth in each individual request, just in a single request

Matomo content tracking did not work if you were using a reverse proxy. This fixes https://github.com/matomo-org/tracker-proxy/issues/94
---
 proxy.php | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/proxy.php b/proxy.php
index 6cff207..49e5159 100644
--- a/proxy.php
+++ b/proxy.php
@@ -242,6 +242,7 @@ function getHttpContentAndStatus($url, $timeout, $user_agent)
     global $DEBUG_PROXY;
     global $NO_VERIFY_SSL;
     global $http_ip_forward_header;
+    global $TOKEN_AUTH;
 
     $useFopen = @ini_get('allow_url_fopen') == '1';
 
@@ -283,7 +284,27 @@ function getHttpContentAndStatus($url, $timeout, $user_agent)
     // if there's POST data, send our proxy request as a POST
     if (!empty($_POST)) {
         $postBody = file_get_contents("php://input");
+        
+        // Add visitor IP to bulk POST data by setting cip and token_auth in each individual request, just in a single request
+        $data = json_decode($postBody, true);
+        if (isset($data['requests']) && is_array($data['requests'])) {
+            $visitIp = getVisitIp();
+
+            // Add cip and token_auth to each request in the bulk request array
+            foreach ($data['requests'] as &$request) {
+                // Remove leading question mark if present
+                $request = ltrim($request, '?');
 
+                // Add both parameters while preserving the original request string
+                $request = '?' . $request
+                        . '&cip=' . rawurlencode($visitIp)
+                        . '&token_auth=' . rawurlencode($TOKEN_AUTH);
+            }
+
+            // Re-encode as JSON while preserving the original encoding
+            $postBody = json_encode($data, JSON_UNESCAPED_SLASHES);
+        }
+        
         $stream_options['http']['method'] = 'POST';
         $stream_options['http']['header'][] = "Content-type: application/x-www-form-urlencoded";
         $stream_options['http']['header'][] = "Content-Length: " . strlen($postBody);