chrome/browser/safe_browsing/malware_details_cache.h

   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 #ifndef CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_CACHE_H_
   6 #define CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_CACHE_H_
   7
   8 // A class that gets malware details from the HTTP Cache.
   9 // An instance of this class is generated by MalwareDetails.
  10
  11 #include <string>
  12 #include <vector>
  13
  14 #include "base/callback.h"
  15 #include "base/containers/hash_tables.h"
  16 #include "base/memory/linked_ptr.h"
  17 #include "base/memory/ref_counted.h"
  18 #include "chrome/browser/safe_browsing/report.pb.h"
  19 #include "net/base/completion_callback.h"
  20 #include "net/url_request/url_fetcher_delegate.h"
  21
  22 namespace net {
  23 class URLFetcher;
  24 class URLRequestContext;
  25 }
  26
  27 namespace safe_browsing {
  28
  29 // Maps a URL to its Resource.
  30 typedef base::hash_map<
  31   std::string,
  32   linked_ptr<safe_browsing::ClientMalwareReportRequest::Resource> > ResourceMap;
  33 }
  34
  35 class MalwareDetailsCacheCollector
  36     : public base::RefCountedThreadSafe<MalwareDetailsCacheCollector>,
  37       public net::URLFetcherDelegate {
  38
  39  public:
  40   MalwareDetailsCacheCollector();
  41
  42   // We use |request_context_getter|, we modify |resources| and
  43   // |result|, and we call |callback|, so they must all remain alive
  44   // for the lifetime of this object.
  45   void StartCacheCollection(
  46       net::URLRequestContextGetter* request_context_getter,
  47       safe_browsing::ResourceMap* resources,
  48       bool* result,
  49       const base::Closure& callback);
  50
  51   // Returns whether or not StartCacheCollection has been called.
  52   bool HasStarted();
  53
  54  protected:
  55   // Implementation of URLFetcher::Delegate. Called after the request
  56   // completes (either successfully or with failure).
  57   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
  58
  59  private:
  60   friend class base::RefCountedThreadSafe<MalwareDetailsCacheCollector>;
  61
  62   virtual ~MalwareDetailsCacheCollector();
  63
  64   // Points to the url for which we are fetching the HTTP cache entry or
  65   // redirect chain.
  66   safe_browsing::ResourceMap::iterator resources_it_;
  67
  68   // Points to the resources_ map in the MalwareDetails.
  69   safe_browsing::ResourceMap* resources_;
  70
  71   // Points to the cache_result_ in the MalwareDetails.
  72   bool* result_;
  73
  74   // Method we call when we are done. The caller must be alive for the
  75   // whole time, we are modifying its state (see above).
  76   base::Closure callback_;
  77
  78   // Set to true as soon as StartCacheCollection is called.
  79   bool has_started_;
  80
  81   // Used to get a pointer to the current request context.
  82   scoped_refptr<net::URLRequestContextGetter> request_context_getter_;
  83
  84   // The current URLFetcher.
  85   scoped_ptr<net::URLFetcher> current_fetch_;
  86
  87   // Returns the resource from resources_ that corresponds to |url|
  88   safe_browsing::ClientMalwareReportRequest::Resource* GetResource(
  89       const GURL& url);
  90
  91   // Creates a new URLFetcher and starts it.
  92   void OpenEntry();
  93
  94   // Read the HTTP response from |source| and add it to |pb_resource|.
  95   void ReadResponse(
  96       safe_browsing::ClientMalwareReportRequest::Resource* pb_resource,
  97       const net::URLFetcher* source);
  98
  99   // Read the body |data| and add it to |pb_resource|.
 100   void ReadData(
 101       safe_browsing::ClientMalwareReportRequest::Resource* pb_resource,
 102       const std::string& data);
 103
 104   // Called when we are done.
 105   void AllDone(bool success);
 106
 107   // Advances to the next entry in resources_it_.
 108   void AdvanceEntry();
 109 };
 110
 111 #endif  // CHROME_BROWSER_SAFE_BROWSING_MALWARE_DETAILS_CACHE_H_