HTTP error: 400 when trying to contact crossref.org for XML input

I debugged the problem.

In the Biblio file, ...site/all/modules/biblio/modules/crossref/biblio.crossref.client.php, in the function called fetch, you have to make the following change:

FROM: $request_options = array('method' => 'POST');
TO: $request_options = array('method' => 'GET');

It should have been GET in the first place, I suppose; but it seems that POST had been working, as well.

The problem is that the crossref.org server is now throwing a Java exception when you present it with a POST request at this URL, thus producing the 400 server error.

Kevin Sullivan

I've committed that change. Thanks Kevin for tracking it down.

I made the change suggested by kevinsullivan in #1 and still get the same error message.

"HTTP error: 400 when trying to contact crossref.org for XML input"

Any other suggestions to correct this issue?

Jeff

I got the same issue, #1 solved it.
The queried url can be retrieved for testing in you browser by adding a line in fetch():

  public function fetch() {
    $this->query = $this->url . '?pid=' . $this->pid . '&noredirect=true&format=unixref&id=doi%3A' . $this->doi;
    drupal_set_message($this->query); // add this line for url output

Kudos to KevinSullivan! Worked like a charm.

Slightly clearer fix, for a cleaner easier read code base. Albeit I am not reopening for this simple style fix.

From

    $request_options = array('method' => 'POST');
    $result = drupal_http_request($this->query, $request_options);

To

    $result = drupal_http_request($this->query);

Reference: http://cgit.drupalcode.org/biblio/commit/?id=fd8ee42

Still getting this issue on rc7 and -dev (todays date - tried both). Made all of the changes above in both. Still got same error. Using ' 10.1056/NEJMoa1402454' as the DOI.

#1 worked for me...POST -> GET

thanks!