From dba2c595e2474db00660c1a86dfc38ddbce091aa Mon Sep 17 00:00:00 2001
From: "richard.king" <richard.king@rocketspark.com>
Date: Wed, 6 Jul 2022 17:40:26 +1200
Subject: [PATCH 1/2] Overwrite Expect header with empty Expect value, which
 removes it.

Php Curl automatically adds this header, which causes Mailchimp to reject the api call.
---
 src/Requests/MailchimpRequest.php           | 1 +
 tests/UtilityTests/MailchimpRequestTest.php | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/src/Requests/MailchimpRequest.php b/src/Requests/MailchimpRequest.php
index 47c60c93..4eff51c2 100644
--- a/src/Requests/MailchimpRequest.php
+++ b/src/Requests/MailchimpRequest.php
@@ -210,6 +210,7 @@ public function getHeaders()
         if (!is_array($this->headers)) {
             throw new MailchimpException("Request headers must be of type array");
         }
+        $this->headers[] = 'Expect:';
         return $this->headers;
     }
 
diff --git a/tests/UtilityTests/MailchimpRequestTest.php b/tests/UtilityTests/MailchimpRequestTest.php
index d0f58093..1a5e1e0c 100644
--- a/tests/UtilityTests/MailchimpRequestTest.php
+++ b/tests/UtilityTests/MailchimpRequestTest.php
@@ -24,6 +24,15 @@ public function testAuthHeadersSet()
         self::assertEquals($expected, $actual, "Auth Header should be appropriately set");
     }
 
+    public function testExpectHeaderNotSet()
+    {
+        error_log(print_r($this->requestInstance->getHeaders(), true));
+        $expected = 'Expect:';
+        $actual = $this->requestInstance->getHeaders()[1];
+
+        self::assertEquals($expected, $actual, "Expect header should never be set");
+    }
+
     public function testApikeySet()
     {
         self::assertEquals(

From 71cd7e35968c272dd6e4185400af02ee4383eef3 Mon Sep 17 00:00:00 2001
From: Richard King <richard.king@rocketspark.com>
Date: Thu, 7 Jul 2022 08:53:24 +1200
Subject: [PATCH 2/2] Remove error logging from Test

---
 tests/UtilityTests/MailchimpRequestTest.php | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/tests/UtilityTests/MailchimpRequestTest.php b/tests/UtilityTests/MailchimpRequestTest.php
index 1a5e1e0c..2bb1d8ec 100644
--- a/tests/UtilityTests/MailchimpRequestTest.php
+++ b/tests/UtilityTests/MailchimpRequestTest.php
@@ -26,11 +26,9 @@ public function testAuthHeadersSet()
 
     public function testExpectHeaderNotSet()
     {
-        error_log(print_r($this->requestInstance->getHeaders(), true));
         $expected = 'Expect:';
         $actual = $this->requestInstance->getHeaders()[1];
-
-        self::assertEquals($expected, $actual, "Expect header should never be set");
+        self::assertEquals($expected, $actual, "Expect header should be empty");
     }
 
     public function testApikeySet()