OLD | NEW |
---|---|
(Empty) | |
1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
dcheng
2015/11/19 03:41:40
Do you know why this is considered 'modify' instea
Nate Chapin
2015/11/19 19:28:50
They're definitely deleted locally, git rm fails t
| |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 // TODO : Support NP_ASFILEONLY mode | |
6 // TODO : Support NP_SEEK mode | |
7 // TODO : Support SEEKABLE=true in NewStream | |
8 | |
9 #include "content/child/npapi/plugin_stream.h" | |
10 | |
11 #include <algorithm> | |
12 | |
13 #include "base/bind.h" | |
14 #include "base/location.h" | |
15 #include "base/single_thread_task_runner.h" | |
16 #include "base/strings/string_util.h" | |
17 #include "base/strings/utf_string_conversions.h" | |
18 #include "base/thread_task_runner_handle.h" | |
19 #include "content/child/npapi/plugin_instance.h" | |
20 #include "net/base/mime_util.h" | |
21 #include "url/gurl.h" | |
22 | |
23 namespace content { | |
24 | |
25 PluginStream::PluginStream( | |
26 PluginInstance* instance, | |
27 const char* url, | |
28 bool need_notify, | |
29 void* notify_data) | |
30 : instance_(instance), | |
31 notify_needed_(need_notify), | |
32 notify_data_(notify_data), | |
33 close_on_write_data_(false), | |
34 requested_plugin_mode_(NP_NORMAL), | |
35 opened_(false), | |
36 data_offset_(0), | |
37 seekable_stream_(false) { | |
38 memset(&stream_, 0, sizeof(stream_)); | |
39 stream_.url = base::strdup(url); | |
40 ResetTempFileHandle(); | |
41 ResetTempFileName(); | |
42 } | |
43 | |
44 PluginStream::~PluginStream() { | |
45 // always close our temporary files. | |
46 CloseTempFile(); | |
47 free(const_cast<char*>(stream_.url)); | |
48 } | |
49 | |
50 bool PluginStream::Open(const std::string& mime_type, | |
51 const std::string& headers, | |
52 uint32 length, | |
53 uint32 last_modified, | |
54 bool request_is_seekable) { | |
55 headers_ = headers; | |
56 NPP id = instance_->npp(); | |
57 stream_.end = length; | |
58 stream_.lastmodified = last_modified; | |
59 stream_.pdata = 0; | |
60 stream_.ndata = id->ndata; | |
61 stream_.notifyData = notify_data_; | |
62 if (!headers_.empty()) | |
63 stream_.headers = headers_.c_str(); | |
64 | |
65 bool seekable_stream = false; | |
66 if (request_is_seekable) { | |
67 std::string headers_lc = base::ToLowerASCII(headers); | |
68 if (headers_lc.find("accept-ranges: bytes") != std::string::npos) { | |
69 seekable_stream = true; | |
70 } | |
71 } | |
72 | |
73 const char* char_mime_type = "application/x-unknown-content-type"; | |
74 std::string temp_mime_type; | |
75 if (!mime_type.empty()) { | |
76 char_mime_type = mime_type.c_str(); | |
77 } else { | |
78 GURL gurl(stream_.url); | |
79 | |
80 base::FilePath path = base::FilePath::FromUTF8Unsafe(gurl.path()); | |
81 if (net::GetMimeTypeFromFile(path, &temp_mime_type)) | |
82 char_mime_type = temp_mime_type.c_str(); | |
83 } | |
84 | |
85 // Silverlight expects a valid mime type | |
86 DCHECK_NE(0U, strlen(char_mime_type)); | |
87 NPError err = instance_->NPP_NewStream((NPMIMEType)char_mime_type, | |
88 &stream_, seekable_stream, | |
89 &requested_plugin_mode_); | |
90 if (err != NPERR_NO_ERROR) { | |
91 Notify(err); | |
92 return false; | |
93 } | |
94 | |
95 opened_ = true; | |
96 | |
97 if (requested_plugin_mode_ == NP_SEEK) { | |
98 seekable_stream_ = true; | |
99 } | |
100 // If the plugin has requested certain modes, then we need a copy | |
101 // of this file on disk. Open it and save it as we go. | |
102 if (RequestedPluginModeIsAsFile()) { | |
103 if (OpenTempFile() == false) { | |
104 return false; | |
105 } | |
106 } | |
107 | |
108 mime_type_ = char_mime_type; | |
109 return true; | |
110 } | |
111 | |
112 int PluginStream::Write(const char* buffer, const int length, | |
113 int data_offset) { | |
114 // There may be two streams to write to - the plugin and the file. | |
115 // It is unclear what to do if we cannot write to both. The rules of | |
116 // this function are that the plugin must consume at least as many | |
117 // bytes as returned by the WriteReady call. So, we will attempt to | |
118 // write that many to both streams. If we can't write that many bytes | |
119 // to each stream, we'll return failure. | |
120 | |
121 DCHECK(opened_); | |
122 if (WriteToFile(buffer, length) && | |
123 WriteToPlugin(buffer, length, data_offset)) { | |
124 return length; | |
125 } | |
126 | |
127 return -1; | |
128 } | |
129 | |
130 bool PluginStream::WriteToFile(const char* buf, size_t length) { | |
131 // For ASFILEONLY, ASFILE, and SEEK modes, we need to write | |
132 // to the disk | |
133 if (TempFileIsValid() && RequestedPluginModeIsAsFile()) { | |
134 size_t totalBytesWritten = 0, bytes; | |
135 do { | |
136 bytes = WriteBytes(buf, length); | |
137 totalBytesWritten += bytes; | |
138 } while (bytes > 0U && totalBytesWritten < length); | |
139 | |
140 if (totalBytesWritten != length) { | |
141 return false; | |
142 } | |
143 } | |
144 | |
145 return true; | |
146 } | |
147 | |
148 bool PluginStream::WriteToPlugin(const char* buf, const int length, | |
149 const int data_offset) { | |
150 // For NORMAL and ASFILE modes, we send the data to the plugin now | |
151 if (requested_plugin_mode_ != NP_NORMAL && | |
152 requested_plugin_mode_ != NP_ASFILE && | |
153 requested_plugin_mode_ != NP_SEEK) { | |
154 return true; | |
155 } | |
156 | |
157 int written = TryWriteToPlugin(buf, length, data_offset); | |
158 if (written == -1) | |
159 return false; | |
160 | |
161 if (written < length) { | |
162 // Buffer the remaining data. | |
163 size_t remaining = length - written; | |
164 size_t previous_size = delivery_data_.size(); | |
165 delivery_data_.resize(previous_size + remaining); | |
166 data_offset_ = data_offset; | |
167 memcpy(&delivery_data_[previous_size], buf + written, remaining); | |
168 base::ThreadTaskRunnerHandle::Get()->PostTask( | |
169 FROM_HERE, base::Bind(&PluginStream::OnDelayDelivery, this)); | |
170 } | |
171 | |
172 return true; | |
173 } | |
174 | |
175 void PluginStream::OnDelayDelivery() { | |
176 // It is possible that the plugin stream may have closed before the task | |
177 // was hit. | |
178 if (!opened_) | |
179 return; | |
180 | |
181 int size = static_cast<int>(delivery_data_.size()); | |
182 int written = TryWriteToPlugin(&delivery_data_.front(), size, data_offset_); | |
183 if (written > 0) { | |
184 // Remove the data that we already wrote. | |
185 delivery_data_.erase(delivery_data_.begin(), | |
186 delivery_data_.begin() + written); | |
187 } | |
188 } | |
189 | |
190 int PluginStream::TryWriteToPlugin(const char* buf, const int length, | |
191 const int data_offset) { | |
192 int byte_offset = 0; | |
193 | |
194 if (data_offset > 0) | |
195 data_offset_ = data_offset; | |
196 | |
197 while (byte_offset < length) { | |
198 int bytes_remaining = length - byte_offset; | |
199 int bytes_to_write = instance_->NPP_WriteReady(&stream_); | |
200 if (bytes_to_write > bytes_remaining) | |
201 bytes_to_write = bytes_remaining; | |
202 | |
203 if (bytes_to_write == 0) | |
204 return byte_offset; | |
205 | |
206 int bytes_consumed = instance_->NPP_Write( | |
207 &stream_, data_offset_, bytes_to_write, | |
208 const_cast<char*>(buf + byte_offset)); | |
209 if (bytes_consumed < 0) { | |
210 // The plugin failed, which means that we need to close the stream. | |
211 Close(NPRES_NETWORK_ERR); | |
212 return -1; | |
213 } | |
214 if (bytes_consumed == 0) { | |
215 // The plugin couldn't take all of the data now. | |
216 return byte_offset; | |
217 } | |
218 | |
219 // The plugin might report more that we gave it. | |
220 bytes_consumed = std::min(bytes_consumed, bytes_to_write); | |
221 | |
222 data_offset_ += bytes_consumed; | |
223 byte_offset += bytes_consumed; | |
224 } | |
225 | |
226 if (close_on_write_data_) | |
227 Close(NPRES_DONE); | |
228 | |
229 return length; | |
230 } | |
231 | |
232 bool PluginStream::Close(NPReason reason) { | |
233 if (opened_ == true) { | |
234 opened_ = false; | |
235 | |
236 if (delivery_data_.size()) { | |
237 if (reason == NPRES_DONE) { | |
238 // There is more data to be streamed, don't destroy the stream now. | |
239 close_on_write_data_ = true; | |
240 return true; | |
241 } else { | |
242 // Stop any pending data from being streamed | |
243 delivery_data_.resize(0); | |
244 } | |
245 } | |
246 | |
247 // If we have a temp file, be sure to close it. | |
248 // Also, allow the plugin to access it now. | |
249 if (TempFileIsValid()) { | |
250 CloseTempFile(); | |
251 if (reason == NPRES_DONE) | |
252 WriteAsFile(); | |
253 } | |
254 | |
255 if (stream_.ndata != NULL) { | |
256 // Stream hasn't been closed yet. | |
257 NPError err = instance_->NPP_DestroyStream(&stream_, reason); | |
258 DCHECK(err == NPERR_NO_ERROR); | |
259 } | |
260 } | |
261 | |
262 Notify(reason); | |
263 return true; | |
264 } | |
265 | |
266 WebPluginResourceClient* PluginStream::AsResourceClient() { | |
267 return NULL; | |
268 } | |
269 | |
270 void PluginStream::Notify(NPReason reason) { | |
271 if (notify_needed_) { | |
272 instance_->NPP_URLNotify(stream_.url, reason, notify_data_); | |
273 notify_needed_ = false; | |
274 } | |
275 } | |
276 | |
277 bool PluginStream::RequestedPluginModeIsAsFile() const { | |
278 return (requested_plugin_mode_ == NP_ASFILE || | |
279 requested_plugin_mode_ == NP_ASFILEONLY); | |
280 } | |
281 | |
282 } // namespace content | |
OLD | NEW |