net/url_request/url_request_file_dir_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 "net/url_request/url_request_file_dir_job.h"
   6
   7 #include "base/bind.h"
   8 #include "base/compiler_specific.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/strings/sys_string_conversions.h"
  11 #include "base/strings/utf_string_conversions.h"
  12 #include "base/time/time.h"
  13 #include "net/base/io_buffer.h"
  14 #include "net/base/net_errors.h"
  15 #include "net/base/net_util.h"
  16 #include "net/url_request/url_request_status.h"
  17 #include "url/gurl.h"
  18
  19 #if defined(OS_POSIX)
  20 #include <sys/stat.h>
  21 #endif
  22
  23 namespace net {
  24
  25 URLRequestFileDirJob::URLRequestFileDirJob(URLRequest* request,
  26                                            NetworkDelegate* network_delegate,
  27                                            const base::FilePath& dir_path)
  28     : URLRequestJob(request, network_delegate),
  29       lister_(dir_path, this),
  30       dir_path_(dir_path),
  31       canceled_(false),
  32       list_complete_(false),
  33       wrote_header_(false),
  34       read_pending_(false),
  35       read_buffer_length_(0),
  36       weak_factory_(this) {
  37 }
  38
  39 void URLRequestFileDirJob::StartAsync() {
  40   lister_.Start();
  41
  42   NotifyHeadersComplete();
  43 }
  44
  45 void URLRequestFileDirJob::Start() {
  46   // Start reading asynchronously so that all error reporting and data
  47   // callbacks happen as they would for network requests.
  48   base::MessageLoop::current()->PostTask(
  49       FROM_HERE,
  50       base::Bind(&URLRequestFileDirJob::StartAsync,
  51                  weak_factory_.GetWeakPtr()));
  52 }
  53
  54 void URLRequestFileDirJob::Kill() {
  55   if (canceled_)
  56     return;
  57
  58   canceled_ = true;
  59
  60   if (!list_complete_)
  61     lister_.Cancel();
  62
  63   URLRequestJob::Kill();
  64
  65   weak_factory_.InvalidateWeakPtrs();
  66 }
  67
  68 bool URLRequestFileDirJob::ReadRawData(IOBuffer* buf, int buf_size,
  69                                        int* bytes_read) {
  70   DCHECK(bytes_read);
  71   *bytes_read = 0;
  72
  73   if (is_done())
  74     return true;
  75
  76   if (FillReadBuffer(buf->data(), buf_size, bytes_read))
  77     return true;
  78
  79   // We are waiting for more data
  80   read_pending_ = true;
  81   read_buffer_ = buf;
  82   read_buffer_length_ = buf_size;
  83   SetStatus(URLRequestStatus(URLRequestStatus::IO_PENDING, 0));
  84   return false;
  85 }
  86
  87 bool URLRequestFileDirJob::GetMimeType(std::string* mime_type) const {
  88   *mime_type = "text/html";
  89   return true;
  90 }
  91
  92 bool URLRequestFileDirJob::GetCharset(std::string* charset) {
  93   // All the filenames are converted to UTF-8 before being added.
  94   *charset = "utf-8";
  95   return true;
  96 }
  97
  98 void URLRequestFileDirJob::OnListFile(
  99     const DirectoryLister::DirectoryListerData& data) {
 100   // We wait to write out the header until we get the first file, so that we
 101   // can catch errors from DirectoryLister and show an error page.
 102   if (!wrote_header_) {
 103 #if defined(OS_WIN)
 104     const base::string16& title = dir_path_.value();
 105 #elif defined(OS_POSIX)
 106     // TODO(jungshik): Add SysNativeMBToUTF16 to sys_string_conversions.
 107     // On Mac, need to add NFKC->NFC conversion either here or in file_path.
 108     // On Linux, the file system encoding is not defined, but we assume that
 109     // SysNativeMBToWide takes care of it at least for now. We can try something
 110     // more sophisticated if necessary later.
 111     const base::string16& title = base::WideToUTF16(
 112         base::SysNativeMBToWide(dir_path_.value()));
 113 #endif
 114     data_.append(GetDirectoryListingHeader(title));
 115     wrote_header_ = true;
 116   }
 117
 118 #if defined(OS_WIN)
 119   std::string raw_bytes;  // Empty on Windows means UTF-8 encoded name.
 120 #elif defined(OS_POSIX)
 121   // TOOD(jungshik): The same issue as for the directory name.
 122   base::FilePath filename = data.info.GetName();
 123   const std::string& raw_bytes = filename.value();
 124 #endif
 125   data_.append(GetDirectoryListingEntry(
 126       data.info.GetName().LossyDisplayName(),
 127       raw_bytes,
 128       data.info.IsDirectory(),
 129       data.info.GetSize(),
 130       data.info.GetLastModifiedTime()));
 131
 132   // TODO(darin): coalesce more?
 133   CompleteRead();
 134 }
 135
 136 void URLRequestFileDirJob::OnListDone(int error) {
 137   DCHECK(!canceled_);
 138   if (error != OK) {
 139     read_pending_ = false;
 140     NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, error));
 141   } else {
 142     list_complete_ = true;
 143     CompleteRead();
 144   }
 145 }
 146
 147 URLRequestFileDirJob::~URLRequestFileDirJob() {}
 148
 149 void URLRequestFileDirJob::CompleteRead() {
 150   if (read_pending_) {
 151     int bytes_read;
 152     if (FillReadBuffer(read_buffer_->data(), read_buffer_length_,
 153                        &bytes_read)) {
 154       // We completed the read, so reset the read buffer.
 155       read_pending_ = false;
 156       read_buffer_ = NULL;
 157       read_buffer_length_ = 0;
 158
 159       SetStatus(URLRequestStatus());
 160       NotifyReadComplete(bytes_read);
 161     } else {
 162       NOTREACHED();
 163       // TODO: Better error code.
 164       NotifyDone(URLRequestStatus(URLRequestStatus::FAILED, 0));
 165     }
 166   }
 167 }
 168
 169 bool URLRequestFileDirJob::FillReadBuffer(char* buf, int buf_size,
 170                                           int* bytes_read) {
 171   DCHECK(bytes_read);
 172
 173   *bytes_read = 0;
 174
 175   int count = std::min(buf_size, static_cast<int>(data_.size()));
 176   if (count) {
 177     memcpy(buf, &data_[0], count);
 178     data_.erase(0, count);
 179     *bytes_read = count;
 180     return true;
 181   } else if (list_complete_) {
 182     // EOF
 183     return true;
 184   }
 185   return false;
 186 }
 187
 188 }  // namespace net