title: Content-Type is in lower case in AWS API Request Header
body: <p>I am using AWS Cloudfront and API gateway for a file upload API. I have deployed same code to two different but identical environments. Both the environments are built by the same cloudformation script.
  We are having a weird issue</p>
  <p>When we are uploading file in environment A, we are getting following request</p>
  <pre><code> &quot;headers&quot;: {
      
      &quot;content-type&quot;: &quot;multipart/form-data; boundary=----WebKitFormBoundarygPe3hR4e1dTzLdBt&quot;,
  </code></pre>
  <p>However in environment B I am getting following</p>
  <pre><code> &quot;headers&quot;: {
     
      &quot;Content-Type&quot;: &quot;multipart/form-data; boundary=----WebKitFormBoundarygPe3hR4e1dTzLdBt&quot;,
  </code></pre>
  <p>The difference is Content-Type. In Environment A, I am getting Content-Type in lower case. Not sure why. This behavior is consistent across all browsers.</p>