storage/browser/fileapi/file_system_dir_url_request_job.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 "storage/browser/fileapi/file_system_dir_url_request_job.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/compiler_specific.h"
  11 #include "base/message_loop/message_loop.h"
  12 #include "base/strings/sys_string_conversions.h"
  13 #include "base/strings/utf_string_conversions.h"
  14 #include "base/time/time.h"
  15 #include "build/build_config.h"
  16 #include "net/base/io_buffer.h"
  17 #include "net/base/net_errors.h"
  18 #include "net/base/net_util.h"
  19 #include "net/url_request/url_request.h"
  20 #include "storage/browser/fileapi/file_system_context.h"
  21 #include "storage/browser/fileapi/file_system_operation_runner.h"
  22 #include "storage/browser/fileapi/file_system_url.h"
  23 #include "storage/common/fileapi/directory_entry.h"
  24 #include "storage/common/fileapi/file_system_util.h"
  25 #include "url/gurl.h"
  26
  27 using net::NetworkDelegate;
  28 using net::URLRequest;
  29 using net::URLRequestJob;
  30 using net::URLRequestStatus;
  31
  32 namespace storage {
  33
  34 FileSystemDirURLRequestJob::FileSystemDirURLRequestJob(
  35     URLRequest* request,
  36     NetworkDelegate* network_delegate,
  37     const std::string& storage_domain,
  38     FileSystemContext* file_system_context)
  39     : URLRequestJob(request, network_delegate),
  40       storage_domain_(storage_domain),
  41       file_system_context_(file_system_context),
  42       weak_factory_(this) {
  43 }
  44
  45 FileSystemDirURLRequestJob::~FileSystemDirURLRequestJob() {
  46 }
  47
  48 bool FileSystemDirURLRequestJob::ReadRawData(net::IOBuffer* dest, int dest_size,
  49                                              int *bytes_read) {
  50   int count = std::min(dest_size, static_cast<int>(data_.size()));
  51   if (count > 0) {
  52     memcpy(dest->data(), data_.data(), count);
  53     data_.erase(0, count);
  54   }
  55   *bytes_read = count;
  56   return true;
  57 }
  58
  59 void FileSystemDirURLRequestJob::Start() {
  60   base::MessageLoop::current()->PostTask(
  61       FROM_HERE,
  62       base::Bind(&FileSystemDirURLRequestJob::StartAsync,
  63                  weak_factory_.GetWeakPtr()));
  64 }
  65
  66 void FileSystemDirURLRequestJob::Kill() {
  67   URLRequestJob::Kill();
  68   weak_factory_.InvalidateWeakPtrs();
  69 }
  70
  71 bool FileSystemDirURLRequestJob::GetMimeType(std::string* mime_type) const {
  72   *mime_type = "text/html";
  73   return true;
  74 }
  75
  76 bool FileSystemDirURLRequestJob::GetCharset(std::string* charset) {
  77   *charset = "utf-8";
  78   return true;
  79 }
  80
  81 void FileSystemDirURLRequestJob::StartAsync() {
  82   if (!request_)
  83     return;
  84   url_ = file_system_context_->CrackURL(request_->url());
  85   if (!url_.is_valid()) {
  86     file_system_context_->AttemptAutoMountForURLRequest(
  87         request_,
  88         storage_domain_,
  89         base::Bind(&FileSystemDirURLRequestJob::DidAttemptAutoMount,
  90                    weak_factory_.GetWeakPtr()));
  91     return;
  92   }
  93   if (!file_system_context_->CanServeURLRequest(url_)) {
  94     // In incognito mode the API is not usable and there should be no data.
  95     if (url_.is_valid() && VirtualPath::IsRootPath(url_.virtual_path())) {
  96       // Return an empty directory if the filesystem root is queried.
  97       DidReadDirectory(base::File::FILE_OK,
  98                        std::vector<DirectoryEntry>(),
  99                        false);
 100       return;
 101     }
 102     NotifyDone(URLRequestStatus(URLRequestStatus::FAILED,
 103                                 net::ERR_FILE_NOT_FOUND));
 104     return;
 105   }
 106   file_system_context_->operation_runner()->ReadDirectory(
 107       url_,
 108       base::Bind(&FileSystemDirURLRequestJob::DidReadDirectory, this));
 109 }
 110
 111 void FileSystemDirURLRequestJob::DidAttemptAutoMount(base::File::Error result) {
 112   if (result >= 0 &&
 113       file_system_context_->CrackURL(request_->url()).is_valid()) {
 114     StartAsync();
 115   } else {
 116     NotifyDone(URLRequestStatus(URLRequestStatus::FAILED,
 117                                 net::ERR_FILE_NOT_FOUND));
 118   }
 119 }
 120
 121 void FileSystemDirURLRequestJob::DidReadDirectory(
 122     base::File::Error result,
 123     const std::vector<DirectoryEntry>& entries,
 124     bool has_more) {
 125   if (result != base::File::FILE_OK) {
 126     int rv = net::ERR_FILE_NOT_FOUND;
 127     if (result == base::File::FILE_ERROR_INVALID_URL)
 128       rv = net::ERR_INVALID_URL;
 129     NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, rv));
 130     return;
 131   }
 132
 133   if (!request_)
 134     return;
 135
 136   if (data_.empty()) {
 137     base::FilePath relative_path = url_.path();
 138 #if defined(OS_POSIX)
 139     relative_path =
 140         base::FilePath(FILE_PATH_LITERAL("/") + relative_path.value());
 141 #endif
 142     const base::string16& title = relative_path.LossyDisplayName();
 143     data_.append(net::GetDirectoryListingHeader(title));
 144   }
 145
 146   typedef std::vector<DirectoryEntry>::const_iterator EntryIterator;
 147   for (EntryIterator it = entries.begin(); it != entries.end(); ++it) {
 148     const base::string16& name = base::FilePath(it->name).LossyDisplayName();
 149     data_.append(net::GetDirectoryListingEntry(
 150         name, std::string(), it->is_directory, it->size,
 151         it->last_modified_time));
 152   }
 153
 154   if (!has_more) {
 155     set_expected_content_size(data_.size());
 156     NotifyHeadersComplete();
 157   }
 158 }
 159
 160 }  // namespace storage