15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu#include "components/captive_portal/captive_portal_detector.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 82a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)#include "base/strings/string_number_conversions.h" 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/base/load_flags.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/http/http_response_headers.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "net/url_request/url_request_status.h" 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace captive_portal { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)const char CaptivePortalDetector::kDefaultURL[] = 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) "http://www.gstatic.com/generate_204"; 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CaptivePortalDetector::CaptivePortalDetector( 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const scoped_refptr<net::URLRequestContextGetter>& request_context) 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : request_context_(request_context) { 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)CaptivePortalDetector::~CaptivePortalDetector() { 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CaptivePortalDetector::DetectCaptivePortal( 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const GURL& url, 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const DetectionCallback& detection_callback) { 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!FetchingURL()); 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(detection_callback_.is_null()); 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) detection_callback_ = detection_callback; 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // The first 0 means this can use a TestURLFetcherFactory in unit tests. 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) url_fetcher_.reset(net::URLFetcher::Create(0, 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) url, 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::URLFetcher::GET, 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) this)); 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) url_fetcher_->SetAutomaticallyRetryOn5xx(false); 41868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles) url_fetcher_->SetRequestContext(request_context_.get()); 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Can't safely use net::LOAD_DISABLE_CERT_REVOCATION_CHECKING here, 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // since then the connection may be reused without checking the cert. 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) url_fetcher_->SetLoadFlags( 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::LOAD_BYPASS_CACHE | 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::LOAD_DO_NOT_PROMPT_FOR_LOGIN | 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::LOAD_DO_NOT_SAVE_COOKIES | 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::LOAD_DO_NOT_SEND_COOKIES | 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::LOAD_DO_NOT_SEND_AUTH_DATA); 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) url_fetcher_->Start(); 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CaptivePortalDetector::Cancel() { 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) url_fetcher_.reset(); 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) detection_callback_.Reset(); 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CaptivePortalDetector::OnURLFetchComplete(const net::URLFetcher* source) { 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(CalledOnValidThread()); 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(FetchingURL()); 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK_EQ(url_fetcher_.get(), source); 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!detection_callback_.is_null()); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Results results; 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) GetCaptivePortalResultFromResponse(url_fetcher_.get(), &results); 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DetectionCallback callback = detection_callback_; 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) url_fetcher_.reset(); 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) detection_callback_.Reset(); 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) callback.Run(results); 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 725821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Takes a net::URLFetcher that has finished trying to retrieve the test 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// URL, and returns a CaptivePortalService::Result based on its result. 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void CaptivePortalDetector::GetCaptivePortalResultFromResponse( 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const net::URLFetcher* url_fetcher, 775821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Results* results) const { 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(results); 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!url_fetcher->GetStatus().is_io_pending()); 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 815c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu results->result = captive_portal::RESULT_NO_RESPONSE; 822a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) results->response_code = url_fetcher->GetResponseCode(); 832a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) results->retry_after_delta = base::TimeDelta(); 84effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch results->landing_url = url_fetcher->GetURL(); 855821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 865821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If there's a network error of some sort when fetching a file via HTTP, 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // there may be a networking problem, rather than a captive portal. 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // TODO(mmenke): Consider special handling for redirects that end up at 895821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // errors, especially SSL certificate errors. 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (url_fetcher->GetStatus().status() != net::URLRequestStatus::SUCCESS) 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // In the case of 503 errors, look for the Retry-After header. 942a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (results->response_code == 503) { 955821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) net::HttpResponseHeaders* headers = url_fetcher->GetResponseHeaders(); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) std::string retry_after_string; 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // If there's no Retry-After header, nothing else to do. 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (!headers->EnumerateHeader(NULL, "Retry-After", &retry_after_string)) 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1025821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Otherwise, try parsing it as an integer (seconds) or as an HTTP date. 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int seconds; 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Time full_date; 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (base::StringToInt(retry_after_string, &seconds)) { 1065821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) results->retry_after_delta = base::TimeDelta::FromSeconds(seconds); 1075821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } else if (headers->GetTimeValuedHeader("Retry-After", &full_date)) { 1085821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) base::Time now = GetCurrentTime(); 1095821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (full_date > now) 1105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) results->retry_after_delta = full_date - now; 1115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // A 511 response (Network Authentication Required) means that the user needs 1165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // to login to whatever server issued the response. 1175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // See: http://tools.ietf.org/html/rfc6585 1182a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (results->response_code == 511) { 1195c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu results->result = captive_portal::RESULT_BEHIND_CAPTIVE_PORTAL; 1205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Other non-2xx/3xx HTTP responses may indicate server errors. 1242a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (results->response_code >= 400 || results->response_code < 200) 1255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // A 204 response code indicates there's no captive portal. 1282a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) if (results->response_code == 204) { 1295c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu results->result = captive_portal::RESULT_INTERNET_CONNECTED; 1305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return; 1315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 1325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Otherwise, assume it's a captive portal. 1345c02ac1a9c1b504631c0a3d2b6e737b5d738bae1Bo Liu results->result = captive_portal::RESULT_BEHIND_CAPTIVE_PORTAL; 1355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)base::Time CaptivePortalDetector::GetCurrentTime() const { 1385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (time_for_testing_.is_null()) 1395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return base::Time::Now(); 1405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) else 1415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return time_for_testing_; 1425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)bool CaptivePortalDetector::FetchingURL() const { 1455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return url_fetcher_.get() != NULL; 1465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace captive_portal 149