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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 #ifndef CONTENT_BROWSER_LOADER_CERTIFICATE_RESOURCE_HANDLER_H_
      6 #define CONTENT_BROWSER_LOADER_CERTIFICATE_RESOURCE_HANDLER_H_
      7 
      8 #include <string>
      9 #include <utility>
     10 #include <vector>
     11 
     12 #include "base/compiler_specific.h"
     13 #include "base/memory/ref_counted.h"
     14 #include "base/memory/scoped_ptr.h"
     15 #include "content/browser/loader/resource_handler.h"
     16 #include "net/base/mime_util.h"
     17 
     18 namespace net {
     19 class IOBuffer;
     20 class URLRequest;
     21 class URLRequestStatus;
     22 }  // namespace net
     23 
     24 namespace content {
     25 
     26 // This class handles certificate mime types such as:
     27 // - "application/x-x509-user-cert"
     28 // - "application/x-x509-ca-cert"
     29 // - "application/x-pkcs12"
     30 //
     31 class CertificateResourceHandler : public ResourceHandler {
     32  public:
     33   explicit CertificateResourceHandler(net::URLRequest* request);
     34   virtual ~CertificateResourceHandler();
     35 
     36   virtual bool OnUploadProgress(uint64 position, uint64 size) OVERRIDE;
     37 
     38   // Not needed, as this event handler ought to be the final resource.
     39   virtual bool OnRequestRedirected(const net::RedirectInfo& redirect_info,
     40                                    ResourceResponse* resp,
     41                                    bool* defer) OVERRIDE;
     42 
     43   // Check if this indeed an X509 cert.
     44   virtual bool OnResponseStarted(ResourceResponse* resp,
     45                                  bool* defer) OVERRIDE;
     46 
     47   // Pass-through implementation.
     48   virtual bool OnWillStart(const GURL& url, bool* defer) OVERRIDE;
     49 
     50   // Pass-through implementation.
     51   virtual bool OnBeforeNetworkStart(const GURL& url, bool* defer) OVERRIDE;
     52 
     53   // Create a new buffer to store received data.
     54   virtual bool OnWillRead(scoped_refptr<net::IOBuffer>* buf,
     55                           int* buf_size,
     56                           int min_size) OVERRIDE;
     57 
     58   // A read was completed, maybe allocate a new buffer for further data.
     59   virtual bool OnReadCompleted(int bytes_read, bool* defer) OVERRIDE;
     60 
     61   // Done downloading the certificate.
     62   virtual void OnResponseCompleted(const net::URLRequestStatus& urs,
     63                                    const std::string& sec_info,
     64                                    bool* defer) OVERRIDE;
     65 
     66   // N/A to cert downloading.
     67   virtual void OnDataDownloaded(int bytes_downloaded) OVERRIDE;
     68 
     69  private:
     70   typedef std::vector<std::pair<scoped_refptr<net::IOBuffer>,
     71                                 size_t> > ContentVector;
     72 
     73   void AssembleResource();
     74 
     75   size_t content_length_;
     76   ContentVector buffer_;
     77   scoped_refptr<net::IOBuffer> read_buffer_;
     78   scoped_refptr<net::IOBuffer> resource_buffer_;  // Downloaded certificate.
     79   net::CertificateMimeType cert_type_;
     80   DISALLOW_COPY_AND_ASSIGN(CertificateResourceHandler);
     81 };
     82 
     83 }  // namespace content
     84 
     85 #endif  // CONTENT_BROWSER_LOADER_CERTIFICATE_RESOURCE_HANDLER_H_
     86