//构建OAuth 授权请求
OAuthAuthzRequest oauthRequest = new OAuthAuthzRequest(request);
//检查传入的客户端id是否正确
if (!oAuthService.checkClientId(oauthRequest.getClientId())) {
OAuthResponse response =
OAuthASResponse.errorResponse(HttpServletResponse.SC_BAD_REQUEST)
.setError(OAuthError.TokenResponse.INVALID_CLIENT)
.setErrorDescription(Constants.INVALID_CLIENT_DESCRIPTION)
.buildJSONMessage();
return new ResponseEntity(response.getBody(), HttpStatus.valueOf(response.getResponseStatus()));
}
Subject subject = SecurityUtils.getSubject();
//如果用户没有登录，跳转到登陆页面
if(!subject.isAuthenticated()) {
if(!login(subject, request)) {//登录失败时跳转到登陆页面
model.addAttribute("client", clientService.findByClientId(oauthRequest.getClientId()));
return "oauth2login";
}
}
String username = (String)subject.getPrincipal();
//生成授权码
String authorizationCode = null;
//responseType目前仅支持CODE，另外还有TOKEN
String responseType = oauthRequest.getParam(OAuth.OAUTH_RESPONSE_TYPE);
if (responseType.equals(ResponseType.CODE.toString())) {
OAuthIssuerImpl oauthIssuerImpl = new OAuthIssuerImpl(new MD5Generator());
authorizationCode = oauthIssuerImpl.authorizationCode();
oAuthService.addAuthCode(authorizationCode, username);
}
//进行OAuth响应构建
OAuthASResponse.OAuthAuthorizationResponseBuilder builder =
OAuthASResponse.authorizationResponse(request, HttpServletResponse.SC_FOUND);
//设置授权码
builder.setCode(authorizationCode);
//得到到客户端重定向地址
String redirectURI = oauthRequest.getParam(OAuth.OAUTH_REDIRECT_URI);
//构建响应
final OAuthResponse response = builder.location(redirectURI).buildQueryMessage();
//根据OAuthResponse返回ResponseEntity响应
HttpHeaders headers = new HttpHeaders();
headers.setLocation(new URI(response.getLocationUri()));
return new ResponseEntity(headers, HttpStatus.valueOf(response.getResponseStatus()));
} catch (OAuthProblemException e) {
//出错处理
String redirectUri = e.getRedirectUri();
if (OAuthUtils.isEmpty(redirectUri)) {
//告诉客户端没有传入redirectUri直接报错
return new ResponseEntity("OAuth callback url needs to be provided by client!!!", HttpStatus.NOT_FOUND);
}
//返回错误消息（如?error=）
final OAuthResponse response =
OAuthASResponse.errorResponse(HttpServletResponse.SC_FOUND)
.error(e).location(redirectUri).buildQueryMessage();
HttpHeaders headers = new HttpHeaders();
headers.setLocation(new URI(response.getLocationUri()));
return new ResponseEntity(headers, HttpStatus.valueOf(response.getResponseStatus()));
}
}