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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 // This class pairs with DownloadController on Java side to forward requests
      6 // for GET downloads to the current DownloadListener. POST downloads are
      7 // handled on the native side.
      8 //
      9 // Both classes are Singleton classes. C++ object owns Java object.
     10 //
     11 // Call sequence
     12 // GET downloads:
     13 // DownloadControllerAndroid::CreateGETDownload() =>
     14 // DownloadController.newHttpGetDownload() =>
     15 // DownloadListener.onDownloadStart() /
     16 // DownloadListener2.requestHttpGetDownload()
     17 //
     18 
     19 #ifndef CONTENT_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_IMPL_H_
     20 #define CONTENT_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_IMPL_H_
     21 
     22 #include <string>
     23 
     24 #include "base/android/jni_weak_ref.h"
     25 #include "base/android/scoped_java_ref.h"
     26 #include "base/callback.h"
     27 #include "base/memory/singleton.h"
     28 #include "content/public/browser/android/download_controller_android.h"
     29 #include "content/public/browser/download_item.h"
     30 #include "net/cookies/cookie_monster.h"
     31 #include "url/gurl.h"
     32 
     33 namespace net {
     34 class URLRequest;
     35 }
     36 
     37 namespace content {
     38 struct GlobalRequestID;
     39 class RenderViewHost;
     40 class WebContents;
     41 
     42 class DownloadControllerAndroidImpl : public DownloadControllerAndroid,
     43                                       public DownloadItem::Observer {
     44  public:
     45   static DownloadControllerAndroidImpl* GetInstance();
     46 
     47   static bool RegisterDownloadController(JNIEnv* env);
     48 
     49   // Called when DownloadController Java object is instantiated.
     50   void Init(JNIEnv* env, jobject obj);
     51  private:
     52   // Used to store all the information about an Android download.
     53   struct DownloadInfoAndroid {
     54     explicit DownloadInfoAndroid(net::URLRequest* request);
     55     ~DownloadInfoAndroid();
     56 
     57     // The URL from which we are downloading. This is the final URL after any
     58     // redirection by the server for |original_url_|.
     59     GURL url;
     60     // The original URL before any redirection by the server for this URL.
     61     GURL original_url;
     62     int64 total_bytes;
     63     std::string content_disposition;
     64     std::string original_mime_type;
     65     std::string user_agent;
     66     std::string cookie;
     67     std::string referer;
     68 
     69     WebContents* web_contents;
     70     // Default copy constructor is used for passing this struct by value.
     71   };
     72   struct JavaObject;
     73   friend struct DefaultSingletonTraits<DownloadControllerAndroidImpl>;
     74   DownloadControllerAndroidImpl();
     75   virtual ~DownloadControllerAndroidImpl();
     76 
     77   // DownloadControllerAndroid implementation.
     78   virtual void CreateGETDownload(int render_process_id, int render_view_id,
     79                                  int request_id) OVERRIDE;
     80   virtual void OnDownloadStarted(DownloadItem* download_item) OVERRIDE;
     81   virtual void StartContextMenuDownload(
     82       const ContextMenuParams& params, WebContents* web_contents,
     83       bool is_link) OVERRIDE;
     84   virtual void DangerousDownloadValidated(
     85       WebContents* web_contents, int download_id, bool accept) OVERRIDE;
     86 
     87   // DownloadItem::Observer interface.
     88   virtual void OnDownloadUpdated(DownloadItem* item) OVERRIDE;
     89 
     90   typedef base::Callback<void(const DownloadInfoAndroid&)>
     91       GetDownloadInfoCB;
     92   void PrepareDownloadInfo(const GlobalRequestID& global_id,
     93                            const GetDownloadInfoCB& callback);
     94   void CheckPolicyAndLoadCookies(const DownloadInfoAndroid& info,
     95                                  const GetDownloadInfoCB& callback,
     96                                  const GlobalRequestID& global_id,
     97                                  const net::CookieList& cookie_list);
     98   void DoLoadCookies(const DownloadInfoAndroid& info,
     99                      const GetDownloadInfoCB& callback,
    100                      const GlobalRequestID& global_id);
    101   void OnCookieResponse(DownloadInfoAndroid info,
    102                         const GetDownloadInfoCB& callback,
    103                         const std::string& cookie);
    104   void StartDownloadOnUIThread(const GetDownloadInfoCB& callback,
    105                                const DownloadInfoAndroid& info);
    106   void StartAndroidDownload(int render_process_id,
    107                             int render_view_id,
    108                             const DownloadInfoAndroid& info);
    109 
    110   // The download item contains dangerous file types.
    111   void OnDangerousDownload(DownloadItem *item);
    112 
    113   base::android::ScopedJavaLocalRef<jobject> GetContentViewCoreFromWebContents(
    114       WebContents* web_contents);
    115 
    116   base::android::ScopedJavaLocalRef<jobject> GetContentView(
    117       int render_process_id, int render_view_id);
    118 
    119   // Creates Java object if it is not created already and returns it.
    120   JavaObject* GetJavaObject();
    121 
    122   JavaObject* java_object_;
    123 
    124   DISALLOW_COPY_AND_ASSIGN(DownloadControllerAndroidImpl);
    125 };
    126 
    127 }  // namespace content
    128 
    129 #endif  // CONTENT_BROWSER_ANDROID_DOWNLOAD_CONTROLLER_ANDROID_IMPL_H_
    130