The postBody option to GuzzleHttpRequest can be passed as an array
or as a string. We were previously handling the array case incorrectly.
Bug: T211806
Change-Id: I8f40b9de9d40a9361eb45103608bf3aaa943bf73
if ( $this->method == 'POST' ) {
$postData = $this->postData;
- $this->guzzleOptions['body'] = $postData;
+ if ( is_array( $postData ) ) {
+ $this->guzzleOptions['form_params'] = $postData;
+ } else {
+ $this->guzzleOptions['body'] = $postData;
+ }
// Suppress 'Expect: 100-continue' header, as some servers
// will reject it with a 417 and Curl won't auto retry