net/cert_net/cert_net_fetcher_impl.h

   1 // Copyright 2015 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 NET_CERT_NET_CERT_NET_FETCHER_H_
   6 #define NET_CERT_NET_CERT_NET_FETCHER_H_
   7
   8 #include <set>
   9
  10 #include "base/callback.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/threading/thread_checker.h"
  13 #include "net/base/net_errors.h"
  14 #include "net/base/net_export.h"
  15 #include "net/cert/cert_net_fetcher.h"
  16
  17 namespace net {
  18
  19 class URLRequestContext;
  20
  21 // CertNetFetcherImpl is an implementation of CertNetFetcher that uses the
  22 // network stack.
  23 //
  24 // For more details refer to the documentation for the interface.
  25 class NET_EXPORT CertNetFetcherImpl : public CertNetFetcher {
  26  public:
  27   // Initializes CertNetFetcherImpl using the specified URLRequestContext for
  28   // issuing requests. |context| must remain valid for the entire lifetime of
  29   // the CertNetFetcherImpl.
  30   explicit CertNetFetcherImpl(URLRequestContext* context);
  31
  32   // Deletion implicitly cancels any outstanding requests.
  33   ~CertNetFetcherImpl() override;
  34
  35   WARN_UNUSED_RESULT scoped_ptr<Request> FetchCaIssuers(
  36       const GURL& url,
  37       int timeout_milliseconds,
  38       int max_response_bytes,
  39       const FetchCallback& callback) override;
  40
  41   WARN_UNUSED_RESULT scoped_ptr<Request> FetchCrl(
  42       const GURL& url,
  43       int timeout_milliseconds,
  44       int max_response_bytes,
  45       const FetchCallback& callback) override;
  46
  47   WARN_UNUSED_RESULT scoped_ptr<Request> FetchOcsp(
  48       const GURL& url,
  49       int timeout_milliseconds,
  50       int max_response_bytes,
  51       const FetchCallback& callback) override;
  52
  53  private:
  54   class RequestImpl;
  55   class Job;
  56   struct JobToRequestParamsComparator;
  57   struct RequestParams;
  58
  59   struct JobComparator {
  60     bool operator()(const Job* job1, const Job* job2) const;
  61   };
  62
  63   // Owns the jobs.
  64   using JobSet = std::set<Job*, JobComparator>;
  65
  66   // Starts an asynchronous request to fetch the given URL. On completion
  67   // |callback| will be invoked.
  68   //
  69   // Completion of the request will never occur synchronously. In other words it
  70   // is guaranteed that |callback| will only be invoked once the Fetch*() method
  71   // has returned.
  72   WARN_UNUSED_RESULT scoped_ptr<Request> Fetch(
  73       scoped_ptr<RequestParams> request_params,
  74       const FetchCallback& callback);
  75
  76   // Finds a job with a matching RequestPararms or returns nullptr if there was
  77   // no match.
  78   Job* FindJob(const RequestParams& params);
  79
  80   // Removes |job| from the in progress jobs and transfers ownership to the
  81   // caller.
  82   scoped_ptr<Job> RemoveJob(Job* job);
  83
  84   // Indicates which Job is currently executing inside of OnJobCompleted().
  85   void SetCurrentlyCompletingJob(Job* job);
  86   void ClearCurrentlyCompletingJob(Job* job);
  87
  88   // The in-progress jobs. This set does not contain the job which is actively
  89   // invoking callbacks (OnJobCompleted). Instead that is tracked by
  90   // |currently_completing_job_|.
  91   JobSet jobs_;
  92
  93   // The Job that is currently executing OnJobCompleted(). There can be at most
  94   // one such job. This pointer is not owned.
  95   Job* currently_completing_job_;
  96
  97   // Not owned. CertNetFetcherImpl must outlive the URLRequestContext.
  98   URLRequestContext* context_;
  99
 100   base::ThreadChecker thread_checker_;
 101
 102   DISALLOW_COPY_AND_ASSIGN(CertNetFetcherImpl);
 103 };
 104
 105 }  // namespace net
 106
 107 #endif  // NET_CERT_NET_CERT_NET_FETCHER_H_