chrome/browser/local_discovery/privet_url_fetcher.h

   1 // Copyright 2013 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_LOCAL_DISCOVERY_PRIVET_URL_FETCHER_H_
   6 #define CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_URL_FETCHER_H_
   7
   8 #include <string>
   9
  10 #include "base/file_util.h"
  11 #include "base/memory/weak_ptr.h"
  12 #include "base/values.h"
  13 #include "net/url_request/url_fetcher.h"
  14 #include "net/url_request/url_fetcher_delegate.h"
  15 #include "net/url_request/url_request_context_getter.h"
  16 #include "url/gurl.h"
  17
  18 namespace base {
  19 class FilePath;
  20 }
  21
  22 namespace local_discovery {
  23
  24 const int kPrivetHTTPCodeInternalFailure = -1;
  25
  26 // Privet-specific URLFetcher adapter. Currently supports only the subset
  27 // of HTTP features required by Privet for GCP 1.5
  28 // (/privet/info and /privet/register).
  29 class PrivetURLFetcher : public net::URLFetcherDelegate {
  30  public:
  31   enum ErrorType {
  32     JSON_PARSE_ERROR,
  33     URL_FETCH_ERROR,
  34     RESPONSE_CODE_ERROR,
  35     RETRY_ERROR,
  36     TOKEN_ERROR
  37   };
  38
  39   typedef base::Callback<void(const std::string& /*token*/)> TokenCallback;
  40
  41   class Delegate {
  42    public:
  43     virtual ~Delegate() {}
  44
  45     // If you do not implement this method, you will always get a
  46     // TOKEN_ERROR error when your token is invalid.
  47     virtual void OnNeedPrivetToken(
  48         PrivetURLFetcher* fetcher,
  49         const TokenCallback& callback);
  50     virtual void OnError(PrivetURLFetcher* fetcher, ErrorType error) = 0;
  51     virtual void OnParsedJson(PrivetURLFetcher* fetcher,
  52                               const base::DictionaryValue* value,
  53                               bool has_error) = 0;
  54   };
  55
  56   PrivetURLFetcher(
  57       const std::string& token,
  58       const GURL& url,
  59       net::URLFetcher::RequestType request_type,
  60       net::URLRequestContextGetter* request_context,
  61       Delegate* delegate);
  62   virtual ~PrivetURLFetcher();
  63
  64   void DoNotRetryOnTransientError();
  65
  66   void AllowEmptyPrivetToken();
  67
  68   void Start();
  69
  70   void SetUploadData(const std::string& upload_content_type,
  71                      const std::string& upload_data);
  72
  73   void SetUploadFilePath(const std::string& upload_content_type,
  74                          const base::FilePath& upload_file_path);
  75
  76   virtual void OnURLFetchComplete(const net::URLFetcher* source) OVERRIDE;
  77
  78   const GURL& url() const { return url_fetcher_->GetOriginalURL(); }
  79   int response_code() const { return url_fetcher_->GetResponseCode(); }
  80
  81  private:
  82   void Try();
  83   void ScheduleRetry(int timeout_seconds);
  84   bool PrivetErrorTransient(const std::string& error);
  85   void RequestTokenRefresh();
  86   void RefreshToken(const std::string& token);
  87
  88   std::string privet_access_token_;
  89   GURL url_;
  90   net::URLFetcher::RequestType request_type_;
  91   scoped_refptr<net::URLRequestContextGetter> request_context_;
  92   Delegate* delegate_;
  93
  94   bool do_not_retry_on_transient_error_;
  95   bool allow_empty_privet_token_;
  96
  97   int tries_;
  98   std::string upload_data_;
  99   std::string upload_content_type_;
 100   base::FilePath upload_file_path_;
 101   scoped_ptr<net::URLFetcher> url_fetcher_;
 102
 103   base::WeakPtrFactory<PrivetURLFetcher> weak_factory_;
 104   DISALLOW_COPY_AND_ASSIGN(PrivetURLFetcher);
 105 };
 106
 107 class PrivetURLFetcherFactory {
 108  public:
 109   explicit PrivetURLFetcherFactory(
 110       net::URLRequestContextGetter* request_context);
 111   ~PrivetURLFetcherFactory();
 112
 113   scoped_ptr<PrivetURLFetcher> CreateURLFetcher(
 114       const GURL& url,
 115       net::URLFetcher::RequestType request_type,
 116       PrivetURLFetcher::Delegate* delegate) const;
 117
 118   void set_token(const std::string& token) { token_ = token; }
 119   const std::string& get_token() const { return token_; }
 120
 121  private:
 122   scoped_refptr<net::URLRequestContextGetter> request_context_;
 123   std::string token_;
 124
 125   DISALLOW_COPY_AND_ASSIGN(PrivetURLFetcherFactory);
 126 };
 127
 128 }  // namespace local_discovery
 129
 130 #endif  // CHROME_BROWSER_LOCAL_DISCOVERY_PRIVET_URL_FETCHER_H_