content/browser/loader/certificate_resource_handler.cc

   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 #include "content/browser/loader/certificate_resource_handler.h"
   6
   7 #include "base/strings/string_util.h"
   8 #include "content/browser/loader/resource_request_info_impl.h"
   9 #include "content/public/browser/content_browser_client.h"
  10 #include "content/public/common/resource_response.h"
  11 #include "net/base/io_buffer.h"
  12 #include "net/base/mime_sniffer.h"
  13 #include "net/base/mime_util.h"
  14 #include "net/http/http_response_headers.h"
  15 #include "net/url_request/url_request.h"
  16 #include "net/url_request/url_request_status.h"
  17
  18 namespace content {
  19
  20 CertificateResourceHandler::CertificateResourceHandler(
  21     net::URLRequest* request)
  22     : ResourceHandler(request),
  23       content_length_(0),
  24       read_buffer_(NULL),
  25       resource_buffer_(NULL),
  26       cert_type_(net::CERTIFICATE_MIME_TYPE_UNKNOWN) {
  27 }
  28
  29 CertificateResourceHandler::~CertificateResourceHandler() {
  30 }
  31
  32 bool CertificateResourceHandler::OnUploadProgress(uint64 position,
  33                                                   uint64 size) {
  34   return true;
  35 }
  36
  37 bool CertificateResourceHandler::OnRequestRedirected(const GURL& url,
  38                                                      ResourceResponse* resp,
  39                                                      bool* defer) {
  40   url_ = url;
  41   return true;
  42 }
  43
  44 bool CertificateResourceHandler::OnResponseStarted(ResourceResponse* resp,
  45                                                    bool* defer) {
  46   cert_type_ = net::GetCertificateMimeTypeForMimeType(resp->head.mime_type);
  47   return cert_type_ != net::CERTIFICATE_MIME_TYPE_UNKNOWN;
  48 }
  49
  50 bool CertificateResourceHandler::OnWillStart(const GURL& url, bool* defer) {
  51   return true;
  52 }
  53
  54 bool CertificateResourceHandler::OnBeforeNetworkStart(const GURL& url,
  55                                                       bool* defer) {
  56   return true;
  57 }
  58
  59 bool CertificateResourceHandler::OnWillRead(scoped_refptr<net::IOBuffer>* buf,
  60                                             int* buf_size,
  61                                             int min_size) {
  62   static const int kReadBufSize = 32768;
  63
  64   // TODO(gauravsh): Should we use 'min_size' here?
  65   DCHECK(buf && buf_size);
  66   if (!read_buffer_.get()) {
  67     read_buffer_ = new net::IOBuffer(kReadBufSize);
  68   }
  69   *buf = read_buffer_.get();
  70   *buf_size = kReadBufSize;
  71
  72   return true;
  73 }
  74
  75 bool CertificateResourceHandler::OnReadCompleted(int bytes_read, bool* defer) {
  76   if (!bytes_read)
  77     return true;
  78
  79   // We have more data to read.
  80   DCHECK(read_buffer_.get());
  81   content_length_ += bytes_read;
  82
  83   // Release the ownership of the buffer, and store a reference
  84   // to it. A new one will be allocated in OnWillRead().
  85   scoped_refptr<net::IOBuffer> buffer;
  86   read_buffer_.swap(buffer);
  87   // TODO(gauravsh): Should this be handled by a separate thread?
  88   buffer_.push_back(std::make_pair(buffer, bytes_read));
  89
  90   return true;
  91 }
  92
  93 void CertificateResourceHandler::OnResponseCompleted(
  94     const net::URLRequestStatus& urs,
  95     const std::string& sec_info,
  96     bool* defer) {
  97   if (urs.status() != net::URLRequestStatus::SUCCESS)
  98     return;
  99
 100   AssembleResource();
 101
 102   const void* content_bytes = NULL;
 103   if (resource_buffer_.get())
 104     content_bytes = resource_buffer_->data();
 105
 106   // Note that it's up to the browser to verify that the certificate
 107   // data is well-formed.
 108   const ResourceRequestInfo* info = GetRequestInfo();
 109   GetContentClient()->browser()->AddCertificate(
 110       cert_type_, content_bytes, content_length_,
 111       info->GetChildID(), info->GetRenderFrameID());
 112 }
 113
 114 void CertificateResourceHandler::AssembleResource() {
 115   // 0-length IOBuffers are not allowed.
 116   if (content_length_ == 0) {
 117     resource_buffer_ = NULL;
 118     return;
 119   }
 120
 121   // Create the new buffer.
 122   resource_buffer_ = new net::IOBuffer(content_length_);
 123
 124   // Copy the data into it.
 125   size_t bytes_copied = 0;
 126   for (size_t i = 0; i < buffer_.size(); ++i) {
 127     net::IOBuffer* data = buffer_[i].first.get();
 128     size_t data_len = buffer_[i].second;
 129     DCHECK(data != NULL);
 130     DCHECK_LE(bytes_copied + data_len, content_length_);
 131     memcpy(resource_buffer_->data() + bytes_copied, data->data(), data_len);
 132     bytes_copied += data_len;
 133   }
 134   DCHECK_EQ(content_length_, bytes_copied);
 135 }
 136
 137 void CertificateResourceHandler::OnDataDownloaded(int bytes_downloaded) {
 138   NOTREACHED();
 139 }
 140
 141 }  // namespace content