Seems like SO have changed something they need all calls to be https

[jdd-software]

SO returns

"The openid.return_to parameter... does not match the actual URL ",

Switching all http to https in the StackExchangeClient.siteLogin seems to solve this problem

private void siteLogin(String host) throws IOException {
	Response response = httpClient.get("https://" + host + "/users/login?returnurl=" + URLEncoder.encode("https://" + host + "/", "UTF-8"), cookies);
	String fkey = response.parse().select("input[name='fkey']").val();
	response = httpClient.post("https://" + host + "/users/authenticate", cookies, "fkey", fkey, "openid_identifier", openIdProvider);
	Document document = response.parse();

	// confirmation prompt?
	if (response.url().toString().startsWith("https://openid.stackexchange.com/account/prompt")) {
		LOGGER.trace("Confirmation prompt \n" + document.html());
		String session = document.select("input[name='session']").first().val();
		fkey = document.select("input[name='fkey']").first().val();
		Response promptResponse = httpClient.post("https://openid.stackexchange.com/account/prompt/submit", cookies, "session", session, "fkey", fkey);
		document = promptResponse.parse();
		LOGGER.trace("Confirmation prompt response \n" + document.html());
	}

	// when the account doesn't exist on this site, confirm its creation
	if (!document.select("form[action='/users/openidconfirm']").isEmpty()) {
		LOGGER.debug("Account doesn't exist on target site '{}', confirming new account", host);
		String session = document.select("input[name='s']").first().val();
		fkey = document.select("input[name='fkey']").first().val();
		Response newAccountResponse = httpClient.post("https://" + host + "/users/openidconfirm", cookies, "s", session, "fkey", fkey);
		LOGGER.trace("New account confirmation response \n" + newAccountResponse.parse().html());
	}

	// check logged in
	Response checkResponse = httpClient.get("https://" + host + "/users/current", cookies);
	if (checkResponse.parse().getElementsByClass("js-inbox-button").first() == null) {
		LOGGER.debug(response.parse().html());
		throw new IllegalStateException("Unable to login to Stack Exchange.");
	}
}

[Tunaki]

Darned Stack Overflow, changing all the thingz and breakin' me codez!

I'll take a look at this (probably in 6 to 8) and release version 1.1.0 with the fix.