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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 #include "webkit/glue/multipart_response_delegate.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "base/strings/string_number_conversions.h" | |
| 9 #include "base/strings/string_util.h" | |
| 10 #include "net/base/net_util.h" | |
| 11 #include "net/http/http_util.h" | |
| 12 #include "third_party/WebKit/public/platform/WebHTTPHeaderVisitor.h" | |
| 13 #include "third_party/WebKit/public/platform/WebString.h" | |
| 14 #include "third_party/WebKit/public/platform/WebURL.h" | |
| 15 #include "third_party/WebKit/public/platform/WebURLLoaderClient.h" | |
| 16 | |
| 17 using WebKit::WebHTTPHeaderVisitor; | |
| 18 using WebKit::WebString; | |
| 19 using WebKit::WebURLLoader; | |
| 20 using WebKit::WebURLLoaderClient; | |
| 21 using WebKit::WebURLResponse; | |
| 22 | |
| 23 namespace webkit_glue { | |
| 24 | |
| 25 namespace { | |
| 26 | |
| 27 // The list of response headers that we do not copy from the original | |
| 28 // response when generating a WebURLResponse for a MIME payload. | |
| 29 const char* kReplaceHeaders[] = { | |
| 30 "content-type", | |
| 31 "content-length", | |
| 32 "content-disposition", | |
| 33 "content-range", | |
| 34 "range", | |
| 35 "set-cookie" | |
| 36 }; | |
| 37 | |
| 38 class HeaderCopier : public WebHTTPHeaderVisitor { | |
| 39 public: | |
| 40 HeaderCopier(WebURLResponse* response) | |
| 41 : response_(response) { | |
| 42 } | |
| 43 virtual void visitHeader(const WebString& name, const WebString& value) { | |
| 44 const std::string& name_utf8 = name.utf8(); | |
| 45 for (size_t i = 0; i < arraysize(kReplaceHeaders); ++i) { | |
| 46 if (LowerCaseEqualsASCII(name_utf8, kReplaceHeaders[i])) | |
| 47 return; | |
| 48 } | |
| 49 response_->setHTTPHeaderField(name, value); | |
| 50 } | |
| 51 private: | |
| 52 WebURLResponse* response_; | |
| 53 }; | |
| 54 | |
| 55 } // namespace | |
| 56 | |
| 57 MultipartResponseDelegate::MultipartResponseDelegate( | |
| 58 WebURLLoaderClient* client, | |
| 59 WebURLLoader* loader, | |
| 60 const WebURLResponse& response, | |
| 61 const std::string& boundary) | |
| 62 : client_(client), | |
| 63 loader_(loader), | |
| 64 original_response_(response), | |
| 65 encoded_data_length_(0), | |
| 66 boundary_("--"), | |
| 67 first_received_data_(true), | |
| 68 processing_headers_(false), | |
| 69 stop_sending_(false), | |
| 70 has_sent_first_response_(false) { | |
| 71 // Some servers report a boundary prefixed with "--". See bug 5786. | |
| 72 if (StartsWithASCII(boundary, "--", true)) { | |
| 73 boundary_.assign(boundary); | |
| 74 } else { | |
| 75 boundary_.append(boundary); | |
| 76 } | |
| 77 } | |
| 78 | |
| 79 void MultipartResponseDelegate::OnReceivedData(const char* data, | |
| 80 int data_len, | |
| 81 int encoded_data_length) { | |
| 82 // stop_sending_ means that we've already received the final boundary token. | |
| 83 // The server should stop sending us data at this point, but if it does, we | |
| 84 // just throw it away. | |
| 85 if (stop_sending_) | |
| 86 return; | |
| 87 | |
| 88 data_.append(data, data_len); | |
| 89 encoded_data_length_ += encoded_data_length; | |
| 90 if (first_received_data_) { | |
| 91 // Some servers don't send a boundary token before the first chunk of | |
| 92 // data. We handle this case anyway (Gecko does too). | |
| 93 first_received_data_ = false; | |
| 94 | |
| 95 // Eat leading \r\n | |
| 96 int pos = PushOverLine(data_, 0); | |
| 97 if (pos) | |
| 98 data_ = data_.substr(pos); | |
| 99 | |
| 100 if (data_.length() < boundary_.length() + 2) { | |
| 101 // We don't have enough data yet to make a boundary token. Just wait | |
| 102 // until the next chunk of data arrives. | |
| 103 first_received_data_ = true; | |
| 104 return; | |
| 105 } | |
| 106 | |
| 107 if (0 != data_.compare(0, boundary_.length(), boundary_)) { | |
| 108 data_ = boundary_ + "\n" + data_; | |
| 109 } | |
| 110 } | |
| 111 DCHECK(!first_received_data_); | |
| 112 | |
| 113 // Headers | |
| 114 if (processing_headers_) { | |
| 115 // Eat leading \r\n | |
| 116 int pos = PushOverLine(data_, 0); | |
| 117 if (pos) | |
| 118 data_ = data_.substr(pos); | |
| 119 | |
| 120 if (ParseHeaders()) { | |
| 121 // Successfully parsed headers. | |
| 122 processing_headers_ = false; | |
| 123 } else { | |
| 124 // Get more data before trying again. | |
| 125 return; | |
| 126 } | |
| 127 } | |
| 128 DCHECK(!processing_headers_); | |
| 129 | |
| 130 size_t boundary_pos; | |
| 131 while ((boundary_pos = FindBoundary()) != std::string::npos) { | |
| 132 if (client_) { | |
| 133 // Strip out trailing \n\r characters in the buffer preceding the | |
| 134 // boundary on the same lines as Firefox. | |
| 135 size_t data_length = boundary_pos; | |
| 136 if (boundary_pos > 0 && data_[boundary_pos - 1] == '\n') { | |
| 137 data_length--; | |
| 138 if (boundary_pos > 1 && data_[boundary_pos - 2] == '\r') { | |
| 139 data_length--; | |
| 140 } | |
| 141 } | |
| 142 if (data_length > 0) { | |
| 143 // Send the last data chunk. | |
| 144 client_->didReceiveData(loader_, | |
| 145 data_.data(), | |
| 146 static_cast<int>(data_length), | |
| 147 encoded_data_length_); | |
| 148 encoded_data_length_ = 0; | |
| 149 } | |
| 150 } | |
| 151 size_t boundary_end_pos = boundary_pos + boundary_.length(); | |
| 152 if (boundary_end_pos < data_.length() && '-' == data_[boundary_end_pos]) { | |
| 153 // This was the last boundary so we can stop processing. | |
| 154 stop_sending_ = true; | |
| 155 data_.clear(); | |
| 156 return; | |
| 157 } | |
| 158 | |
| 159 // We can now throw out data up through the boundary | |
| 160 int offset = PushOverLine(data_, boundary_end_pos); | |
| 161 data_ = data_.substr(boundary_end_pos + offset); | |
| 162 | |
| 163 // Ok, back to parsing headers | |
| 164 if (!ParseHeaders()) { | |
| 165 processing_headers_ = true; | |
| 166 break; | |
| 167 } | |
| 168 } | |
| 169 | |
| 170 // At this point, we should send over any data we have, but keep enough data | |
| 171 // buffered to handle a boundary that may have been truncated. | |
| 172 if (!processing_headers_ && data_.length() > boundary_.length()) { | |
| 173 // If the last character is a new line character, go ahead and just send | |
| 174 // everything we have buffered. This matches an optimization in Gecko. | |
| 175 int send_length = data_.length() - boundary_.length(); | |
| 176 if (data_[data_.length() - 1] == '\n') | |
| 177 send_length = data_.length(); | |
| 178 if (client_) | |
| 179 client_->didReceiveData(loader_, | |
| 180 data_.data(), | |
| 181 send_length, | |
| 182 encoded_data_length_); | |
| 183 data_ = data_.substr(send_length); | |
| 184 encoded_data_length_ = 0; | |
| 185 } | |
| 186 } | |
| 187 | |
| 188 void MultipartResponseDelegate::OnCompletedRequest() { | |
| 189 // If we have any pending data and we're not in a header, go ahead and send | |
| 190 // it to WebCore. | |
| 191 if (!processing_headers_ && !data_.empty() && !stop_sending_ && client_) { | |
| 192 client_->didReceiveData(loader_, | |
| 193 data_.data(), | |
| 194 static_cast<int>(data_.length()), | |
| 195 encoded_data_length_); | |
| 196 encoded_data_length_ = 0; | |
| 197 } | |
| 198 } | |
| 199 | |
| 200 int MultipartResponseDelegate::PushOverLine(const std::string& data, | |
| 201 size_t pos) { | |
| 202 int offset = 0; | |
| 203 if (pos < data.length() && (data[pos] == '\r' || data[pos] == '\n')) { | |
| 204 ++offset; | |
| 205 if (pos + 1 < data.length() && data[pos + 1] == '\n') | |
| 206 ++offset; | |
| 207 } | |
| 208 return offset; | |
| 209 } | |
| 210 | |
| 211 bool MultipartResponseDelegate::ParseHeaders() { | |
| 212 int line_feed_increment = 1; | |
| 213 | |
| 214 // Grab the headers being liberal about line endings. | |
| 215 size_t line_start_pos = 0; | |
| 216 size_t line_end_pos = data_.find('\n'); | |
| 217 while (line_end_pos != std::string::npos) { | |
| 218 // Handle CRLF | |
| 219 if (line_end_pos > line_start_pos && data_[line_end_pos - 1] == '\r') { | |
| 220 line_feed_increment = 2; | |
| 221 --line_end_pos; | |
| 222 } else { | |
| 223 line_feed_increment = 1; | |
| 224 } | |
| 225 if (line_start_pos == line_end_pos) { | |
| 226 // A blank line, end of headers | |
| 227 line_end_pos += line_feed_increment; | |
| 228 break; | |
| 229 } | |
| 230 // Find the next header line. | |
| 231 line_start_pos = line_end_pos + line_feed_increment; | |
| 232 line_end_pos = data_.find('\n', line_start_pos); | |
| 233 } | |
| 234 // Truncated in the middle of a header, stop parsing. | |
| 235 if (line_end_pos == std::string::npos) | |
| 236 return false; | |
| 237 | |
| 238 // Eat headers | |
| 239 std::string headers("\n"); | |
| 240 headers.append(data_, 0, line_end_pos); | |
| 241 data_ = data_.substr(line_end_pos); | |
| 242 | |
| 243 // Create a WebURLResponse based on the original set of headers + the | |
| 244 // replacement headers. We only replace the same few headers that gecko | |
| 245 // does. See netwerk/streamconv/converters/nsMultiMixedConv.cpp. | |
| 246 std::string content_type = net::GetSpecificHeader(headers, "content-type"); | |
| 247 std::string mime_type; | |
| 248 std::string charset; | |
| 249 bool has_charset = false; | |
| 250 net::HttpUtil::ParseContentType(content_type, &mime_type, &charset, | |
| 251 &has_charset, NULL); | |
| 252 WebURLResponse response(original_response_.url()); | |
| 253 response.setMIMEType(WebString::fromUTF8(mime_type)); | |
| 254 response.setTextEncodingName(WebString::fromUTF8(charset)); | |
| 255 | |
| 256 HeaderCopier copier(&response); | |
| 257 original_response_.visitHTTPHeaderFields(&copier); | |
| 258 | |
| 259 for (size_t i = 0; i < arraysize(kReplaceHeaders); ++i) { | |
| 260 std::string name(kReplaceHeaders[i]); | |
| 261 std::string value = net::GetSpecificHeader(headers, name); | |
| 262 if (!value.empty()) { | |
| 263 response.setHTTPHeaderField(WebString::fromUTF8(name), | |
| 264 WebString::fromUTF8(value)); | |
| 265 } | |
| 266 } | |
| 267 // To avoid recording every multipart load as a separate visit in | |
| 268 // the history database, we want to keep track of whether the response | |
| 269 // is part of a multipart payload. We do want to record the first visit, | |
| 270 // so we only set isMultipartPayload to true after the first visit. | |
| 271 response.setIsMultipartPayload(has_sent_first_response_); | |
| 272 has_sent_first_response_ = true; | |
| 273 // Send the response! | |
| 274 if (client_) | |
| 275 client_->didReceiveResponse(loader_, response); | |
| 276 | |
| 277 return true; | |
| 278 } | |
| 279 | |
| 280 // Boundaries are supposed to be preceeded with --, but it looks like gecko | |
| 281 // doesn't require the dashes to exist. See nsMultiMixedConv::FindToken. | |
| 282 size_t MultipartResponseDelegate::FindBoundary() { | |
| 283 size_t boundary_pos = data_.find(boundary_); | |
| 284 if (boundary_pos != std::string::npos) { | |
| 285 // Back up over -- for backwards compat | |
| 286 // TODO(tc): Don't we only want to do this once? Gecko code doesn't seem | |
| 287 // to care. | |
| 288 if (boundary_pos >= 2) { | |
| 289 if ('-' == data_[boundary_pos - 1] && '-' == data_[boundary_pos - 2]) { | |
| 290 boundary_pos -= 2; | |
| 291 boundary_ = "--" + boundary_; | |
| 292 } | |
| 293 } | |
| 294 } | |
| 295 return boundary_pos; | |
| 296 } | |
| 297 | |
| 298 bool MultipartResponseDelegate::ReadMultipartBoundary( | |
| 299 const WebURLResponse& response, | |
| 300 std::string* multipart_boundary) { | |
| 301 std::string content_type = | |
| 302 response.httpHeaderField(WebString::fromUTF8("Content-Type")).utf8(); | |
| 303 | |
| 304 size_t boundary_start_offset = content_type.find("boundary="); | |
| 305 if (boundary_start_offset == std::string::npos) | |
| 306 return false; | |
| 307 | |
| 308 boundary_start_offset += strlen("boundary="); | |
| 309 | |
| 310 size_t boundary_end_offset = content_type.find(';', boundary_start_offset); | |
| 311 | |
| 312 if (boundary_end_offset == std::string::npos) | |
| 313 boundary_end_offset = content_type.length(); | |
| 314 | |
| 315 size_t boundary_length = boundary_end_offset - boundary_start_offset; | |
| 316 | |
| 317 *multipart_boundary = | |
| 318 content_type.substr(boundary_start_offset, boundary_length); | |
| 319 // The byte range response can have quoted boundary strings. This is legal | |
| 320 // as per MIME specifications. Individual data fragements however don't | |
| 321 // contain quoted boundary strings. | |
| 322 TrimString(*multipart_boundary, "\"", multipart_boundary); | |
| 323 return true; | |
| 324 } | |
| 325 | |
| 326 bool MultipartResponseDelegate::ReadContentRanges( | |
| 327 const WebURLResponse& response, | |
| 328 int64* content_range_lower_bound, | |
| 329 int64* content_range_upper_bound, | |
| 330 int64* content_range_instance_size) { | |
| 331 | |
| 332 std::string content_range = response.httpHeaderField("Content-Range").utf8(); | |
| 333 if (content_range.empty()) { | |
| 334 content_range = response.httpHeaderField("Range").utf8(); | |
| 335 } | |
| 336 | |
| 337 if (content_range.empty()) { | |
| 338 DLOG(WARNING) << "Failed to read content range from response."; | |
| 339 return false; | |
| 340 } | |
| 341 | |
| 342 size_t byte_range_lower_bound_start_offset = content_range.find(" "); | |
| 343 if (byte_range_lower_bound_start_offset == std::string::npos) { | |
| 344 return false; | |
| 345 } | |
| 346 | |
| 347 // Skip over the initial space. | |
| 348 byte_range_lower_bound_start_offset++; | |
| 349 | |
| 350 // Find the lower bound. | |
| 351 size_t byte_range_lower_bound_end_offset = | |
| 352 content_range.find("-", byte_range_lower_bound_start_offset); | |
| 353 if (byte_range_lower_bound_end_offset == std::string::npos) { | |
| 354 return false; | |
| 355 } | |
| 356 | |
| 357 size_t byte_range_lower_bound_characters = | |
| 358 byte_range_lower_bound_end_offset - byte_range_lower_bound_start_offset; | |
| 359 std::string byte_range_lower_bound = | |
| 360 content_range.substr(byte_range_lower_bound_start_offset, | |
| 361 byte_range_lower_bound_characters); | |
| 362 | |
| 363 // Find the upper bound. | |
| 364 size_t byte_range_upper_bound_start_offset = | |
| 365 byte_range_lower_bound_end_offset + 1; | |
| 366 | |
| 367 size_t byte_range_upper_bound_end_offset = | |
| 368 content_range.find("/", byte_range_upper_bound_start_offset); | |
| 369 if (byte_range_upper_bound_end_offset == std::string::npos) { | |
| 370 return false; | |
| 371 } | |
| 372 | |
| 373 size_t byte_range_upper_bound_characters = | |
| 374 byte_range_upper_bound_end_offset - byte_range_upper_bound_start_offset; | |
| 375 std::string byte_range_upper_bound = | |
| 376 content_range.substr(byte_range_upper_bound_start_offset, | |
| 377 byte_range_upper_bound_characters); | |
| 378 | |
| 379 // Find the instance size. | |
| 380 size_t byte_range_instance_size_start_offset = | |
| 381 byte_range_upper_bound_end_offset + 1; | |
| 382 | |
| 383 size_t byte_range_instance_size_end_offset = | |
| 384 content_range.length(); | |
| 385 | |
| 386 size_t byte_range_instance_size_characters = | |
| 387 byte_range_instance_size_end_offset - | |
| 388 byte_range_instance_size_start_offset; | |
| 389 std::string byte_range_instance_size = | |
| 390 content_range.substr(byte_range_instance_size_start_offset, | |
| 391 byte_range_instance_size_characters); | |
| 392 | |
| 393 if (!base::StringToInt64(byte_range_lower_bound, content_range_lower_bound)) | |
| 394 return false; | |
| 395 if (!base::StringToInt64(byte_range_upper_bound, content_range_upper_bound)) | |
| 396 return false; | |
| 397 if (!base::StringToInt64(byte_range_instance_size, | |
| 398 content_range_instance_size)) { | |
| 399 return false; | |
| 400 } | |
| 401 return true; | |
| 402 } | |
| 403 | |
| 404 } // namespace webkit_glue | |
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Chromium Code Reviews
Issue 19673002:
Move webkitplatformsupport_impl and related from glue to child (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src