src/xwalk/application/common/application_file_util.cc

   1 // Copyright (c) 2013 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 "xwalk/application/common/application_file_util.h"
   6
   7 #include <algorithm>
   8 #include <map>
   9 #include <vector>
  10
  11 #include "base/command_line.h"
  12 #include "base/files/file_path.h"
  13 #include "base/files/scoped_temp_dir.h"
  14 #include "base/file_util.h"
  15 #include "base/i18n/rtl.h"
  16 #include "base/json/json_file_value_serializer.h"
  17 #include "base/logging.h"
  18 #include "base/metrics/histogram.h"
  19 #include "base/path_service.h"
  20 #include "base/strings/string16.h"
  21 #include "base/strings/stringprintf.h"
  22 #include "base/strings/utf_string_conversions.h"
  23 #include "base/threading/thread_restrictions.h"
  24 #include "net/base/escape.h"
  25 #include "net/base/file_stream.h"
  26 #include "third_party/libxml/src/include/libxml/tree.h"
  27 #include "ui/base/l10n/l10n_util.h"
  28 #include "xwalk/application/common/application_data.h"
  29 #include "xwalk/application/common/application_manifest_constants.h"
  30 #include "xwalk/application/common/constants.h"
  31 #include "xwalk/application/common/manifest.h"
  32 #include "xwalk/application/common/manifest_handler.h"
  33
  34 #if defined(OS_TIZEN)
  35 #include "xwalk/application/common/id_util.h"
  36 #endif
  37
  38 namespace errors = xwalk::application_manifest_errors;
  39 namespace keys = xwalk::application_manifest_keys;
  40 namespace widget_keys = xwalk::application_widget_keys;
  41
  42 namespace {
  43 const char kAttributePrefix[] = "@";
  44 const char kNamespaceKey[] = "@namespace";
  45 const char kTextKey[] = "#text";
  46
  47 const char kContentKey[] = "content";
  48
  49 const xmlChar kWidgetNodeKey[] = "widget";
  50 const xmlChar kNameNodeKey[] = "name";
  51 const xmlChar kDescriptionNodeKey[] = "description";
  52 const xmlChar kAuthorNodeKey[] = "author";
  53 const xmlChar kLicenseNodeKey[] = "license";
  54 const xmlChar kVersionAttributeKey[] = "version";
  55 const xmlChar kShortAttributeKey[] = "short";
  56 const xmlChar kDirAttributeKey[] = "dir";
  57
  58 const char kDirLTRKey[] = "ltr";
  59 const char kDirRTLKey[] = "rtl";
  60 const char kDirLROKey[] = "lro";
  61 const char kDirRLOKey[] = "rlo";
  62
  63 const char* kSingletonElements[] = {
  64   "allow-navigation",
  65   "author",
  66   "content-security-policy-report-only",
  67   "content-security-policy",
  68   "content"
  69 };
  70
  71 inline char* ToCharPointer(void* ptr) {
  72   return reinterpret_cast<char *>(ptr);
  73 }
  74
  75 inline const char* ToConstCharPointer(const void* ptr) {
  76   return reinterpret_cast<const char*>(ptr);
  77 }
  78
  79 base::string16 ToSting16(const xmlChar* string_ptr) {
  80   return base::UTF8ToUTF16(std::string(ToConstCharPointer(string_ptr)));
  81 }
  82
  83 base::string16 GetDirText(const base::string16& text, const std::string& dir) {
  84   if (dir == kDirLTRKey)
  85     return base::i18n::kLeftToRightEmbeddingMark
  86            + text
  87            + base::i18n::kPopDirectionalFormatting;
  88
  89   if (dir == kDirRTLKey)
  90     return base::i18n::kRightToLeftEmbeddingMark
  91            + text
  92            + base::i18n::kPopDirectionalFormatting;
  93
  94   if (dir == kDirLROKey)
  95     return base::i18n::kLeftToRightOverride
  96            + text
  97            + base::i18n::kPopDirectionalFormatting;
  98
  99   if (dir == kDirRLOKey)
 100     return base::i18n::kRightToLeftOverride
 101            + text
 102            + base::i18n::kPopDirectionalFormatting;
 103
 104   return text;
 105 }
 106
 107 std::string GetNodeDir(xmlNode* node, const std::string& inherit_dir) {
 108   DCHECK(node);
 109   std::string dir(inherit_dir);
 110
 111   xmlAttr* prop = NULL;
 112   for (prop = node->properties; prop; prop = prop->next) {
 113     if (xmlStrEqual(prop->name, kDirAttributeKey)) {
 114       char* prop_value = ToCharPointer(xmlNodeListGetString(
 115           node->doc, prop->children, 1));
 116       dir = prop_value;
 117       xmlFree(prop_value);
 118       break;
 119     }
 120   }
 121
 122   return dir;
 123 }
 124
 125 base::string16 GetNodeText(xmlNode* root, const std::string& inherit_dir) {
 126   DCHECK(root);
 127   if (root->type != XML_ELEMENT_NODE)
 128     return base::string16();
 129
 130   std::string current_dir(GetNodeDir(root, inherit_dir));
 131   base::string16 text;
 132   for (xmlNode* node = root->children; node; node = node->next) {
 133     if (node->type == XML_TEXT_NODE || node->type == XML_CDATA_SECTION_NODE) {
 134       text = text + base::i18n::StripWrappingBidiControlCharacters(
 135                         ToSting16(node->content));
 136     } else {
 137       text = text + GetNodeText(node, current_dir);
 138     }
 139   }
 140   return GetDirText(text, current_dir);
 141 }
 142
 143 // According to widget specification, this two prop need to support dir.
 144 // see detail on http://www.w3.org/TR/widgets/#the-dir-attribute
 145 inline bool IsPropSupportDir(xmlNode* root, xmlAttr* prop) {
 146   if (xmlStrEqual(root->name, kWidgetNodeKey)
 147      && xmlStrEqual(prop->name, kVersionAttributeKey))
 148     return true;
 149   if (xmlStrEqual(root->name, kNameNodeKey)
 150      && xmlStrEqual(prop->name, kShortAttributeKey))
 151     return true;
 152   return false;
 153 }
 154
 155 // Only this four items need to support span and ignore other element.
 156 // Besides xmlNodeListGetString can not support dir prop of span.
 157 // See http://www.w3.org/TR/widgets/#the-span-element-and-its-attributes
 158 inline bool IsElementSupportSpanAndDir(xmlNode* root) {
 159   if (xmlStrEqual(root->name, kNameNodeKey)
 160      || xmlStrEqual(root->name, kDescriptionNodeKey)
 161      || xmlStrEqual(root->name, kAuthorNodeKey)
 162      || xmlStrEqual(root->name, kLicenseNodeKey))
 163     return true;
 164   return false;
 165 }
 166
 167 bool IsSingletonElement(const std::string& name) {
 168   for (int i = 0; i < arraysize(kSingletonElements); ++i)
 169     if (kSingletonElements[i] == name)
 170 #if defined(OS_TIZEN)
 171       // On Tizen platform, need to check namespace of 'content'
 172       // element further, a content element with tizen namespace
 173       // will replace the one with widget namespace.
 174       return name != kContentKey;
 175 #else
 176       return true;
 177 #endif
 178   return false;
 179 }
 180
 181 }  // namespace
 182
 183 namespace xwalk {
 184 namespace application {
 185
 186 FileDeleter::FileDeleter(const base::FilePath& path, bool recursive)
 187     : path_(path),
 188       recursive_(recursive) {}
 189
 190 FileDeleter::~FileDeleter() {
 191   base::DeleteFile(path_, recursive_);
 192 }
 193
 194 namespace {
 195
 196 // Load XML node into Dictionary structure.
 197 // The keys for the XML node to Dictionary mapping are described below:
 198 // XML                                 Dictionary
 199 // <e></e>                             "e":{"#text": ""}
 200 // <e>textA</e>                        "e":{"#text":"textA"}
 201 // <e attr="val">textA</e>             "e":{ "@attr":"val", "#text": "textA"}
 202 // <e> <a>textA</a> <b>textB</b> </e>  "e":{
 203 //                                       "a":{"#text":"textA"}
 204 //                                       "b":{"#text":"textB"}
 205 //                                     }
 206 // <e> <a>textX</a> <a>textY</a> </e>  "e":{
 207 //                                       "a":[ {"#text":"textX"},
 208 //                                             {"#text":"textY"}]
 209 //                                     }
 210 // <e> textX <a>textY</a> </e>         "e":{ "#text":"textX",
 211 //                                           "a":{"#text":"textY"}
 212 //                                     }
 213 //
 214 // For elements that are specified under a namespace, the dictionary
 215 // will add '@namespace' key for them, e.g.,
 216 // XML:
 217 // <e xmln="linkA" xmlns:N="LinkB">
 218 //   <sub-e1> text1 </sub-e>
 219 //   <N:sub-e2 text2 />
 220 // </e>
 221 // will be saved in Dictionary as,
 222 // "e":{
 223 //   "#text": "",
 224 //   "@namespace": "linkA"
 225 //   "sub-e1": {
 226 //     "#text": "text1",
 227 //     "@namespace": "linkA"
 228 //   },
 229 //   "sub-e2": {
 230 //     "#text":"text2"
 231 //     "@namespace": "linkB"
 232 //   }
 233 // }
 234 base::DictionaryValue* LoadXMLNode(
 235     xmlNode* root, const std::string& inherit_dir = "") {
 236   scoped_ptr<base::DictionaryValue> value(new base::DictionaryValue);
 237   if (root->type != XML_ELEMENT_NODE)
 238     return NULL;
 239
 240   std::string current_dir(GetNodeDir(root, inherit_dir));
 241
 242   xmlAttr* prop = NULL;
 243   for (prop = root->properties; prop; prop = prop->next) {
 244     xmlChar* value_ptr = xmlNodeListGetString(root->doc, prop->children, 1);
 245     base::string16 prop_value(ToSting16(value_ptr));
 246     xmlFree(value_ptr);
 247
 248     if (IsPropSupportDir(root, prop))
 249       prop_value = GetDirText(prop_value, current_dir);
 250
 251     value->SetString(
 252         std::string(kAttributePrefix) + ToConstCharPointer(prop->name),
 253         prop_value);
 254   }
 255
 256   if (root->ns)
 257     value->SetString(kNamespaceKey, ToConstCharPointer(root->ns->href));
 258
 259   for (xmlNode* node = root->children; node; node = node->next) {
 260     std::string sub_node_name(ToConstCharPointer(node->name));
 261     base::DictionaryValue* sub_value = LoadXMLNode(node, current_dir);
 262     if (!sub_value)
 263       continue;
 264
 265     if (!value->HasKey(sub_node_name)) {
 266       value->Set(sub_node_name, sub_value);
 267       continue;
 268     } else if (IsSingletonElement(sub_node_name)) {
 269       continue;
 270 #if defined(OS_TIZEN)
 271     } else if (sub_node_name == kContentKey) {
 272       std::string current_namespace, new_namespace;
 273       base::DictionaryValue* current_value;
 274       value->GetDictionary(sub_node_name, &current_value);
 275
 276       current_value->GetString(kNamespaceKey, &current_namespace);
 277       sub_value->GetString(kNamespaceKey, &new_namespace);
 278       if (current_namespace != new_namespace &&
 279           new_namespace == widget_keys::kTizenNamespacePrefix)
 280         value->Set(sub_node_name, sub_value);
 281       continue;
 282 #endif
 283     }
 284
 285     base::Value* temp;
 286     value->Get(sub_node_name, &temp);
 287     DCHECK(temp);
 288
 289     if (temp->IsType(base::Value::TYPE_LIST)) {
 290       base::ListValue* list;
 291       temp->GetAsList(&list);
 292       list->Append(sub_value);
 293     } else {
 294       DCHECK(temp->IsType(base::Value::TYPE_DICTIONARY));
 295       base::DictionaryValue* dict;
 296       temp->GetAsDictionary(&dict);
 297       base::DictionaryValue* prev_value = dict->DeepCopy();
 298
 299       base::ListValue* list = new base::ListValue();
 300       list->Append(prev_value);
 301       list->Append(sub_value);
 302       value->Set(sub_node_name, list);
 303     }
 304   }
 305
 306   base::string16 text;
 307   if (IsElementSupportSpanAndDir(root)) {
 308     text = GetNodeText(root, current_dir);
 309   } else {
 310     xmlChar* text_ptr = xmlNodeListGetString(root->doc, root->children, 1);
 311     if (text_ptr) {
 312       text = ToSting16(text_ptr);
 313       xmlFree(text_ptr);
 314     }
 315   }
 316
 317   if (!text.empty())
 318     value->SetString(kTextKey, text);
 319
 320   return value.release();
 321 }
 322
 323 }  // namespace
 324
 325 template <Manifest::Type>
 326 scoped_ptr<Manifest> LoadManifest(
 327     const base::FilePath& manifest_path, std::string* error);
 328
 329 template <>
 330 scoped_ptr<Manifest> LoadManifest<Manifest::TYPE_MANIFEST>(
 331     const base::FilePath& manifest_path, std::string* error) {
 332   JSONFileValueSerializer serializer(manifest_path);
 333   scoped_ptr<base::Value> root(serializer.Deserialize(NULL, error));
 334   if (!root) {
 335     if (error->empty()) {
 336       // If |error| is empty, than the file could not be read.
 337       // It would be cleaner to have the JSON reader give a specific error
 338       // in this case, but other code tests for a file error with
 339       // error->empty().  For now, be consistent.
 340       *error = base::StringPrintf("%s", errors::kManifestUnreadable);
 341     } else {
 342       *error = base::StringPrintf("%s  %s",
 343           errors::kManifestParseError, error->c_str());
 344     }
 345     return scoped_ptr<Manifest>();
 346   }
 347
 348   if (!root->IsType(base::Value::TYPE_DICTIONARY)) {
 349     *error = base::StringPrintf("%s", errors::kManifestUnreadable);
 350     return scoped_ptr<Manifest>();
 351   }
 352
 353   scoped_ptr<base::DictionaryValue> dv = make_scoped_ptr(
 354       static_cast<base::DictionaryValue*>(root.release()));
 355 #if defined(OS_TIZEN)
 356   // Ignore any Tizen application ID, as this is automatically generated.
 357   dv->Remove(keys::kTizenAppIdKey, NULL);
 358 #endif
 359
 360   return make_scoped_ptr(new Manifest(dv.Pass(), Manifest::TYPE_MANIFEST));
 361 }
 362
 363 template <>
 364 scoped_ptr<Manifest> LoadManifest<Manifest::TYPE_WIDGET>(
 365     const base::FilePath& manifest_path,
 366     std::string* error) {
 367   xmlDoc * doc = NULL;
 368   xmlNode* root_node = NULL;
 369   doc = xmlReadFile(manifest_path.MaybeAsASCII().c_str(), NULL, 0);
 370   if (doc == NULL) {
 371     *error = base::StringPrintf("%s", errors::kManifestUnreadable);
 372     return scoped_ptr<Manifest>();
 373   }
 374   root_node = xmlDocGetRootElement(doc);
 375   base::DictionaryValue* dv = LoadXMLNode(root_node);
 376   scoped_ptr<base::DictionaryValue> result(new base::DictionaryValue);
 377   if (dv)
 378     result->Set(ToConstCharPointer(root_node->name), dv);
 379
 380   return make_scoped_ptr(new Manifest(result.Pass(), Manifest::TYPE_WIDGET));
 381 }
 382
 383 scoped_ptr<Manifest> LoadManifest(const base::FilePath& manifest_path,
 384     Manifest::Type type, std::string* error) {
 385   if (type == Manifest::TYPE_MANIFEST)
 386     return LoadManifest<Manifest::TYPE_MANIFEST>(manifest_path, error);
 387
 388   if (type == Manifest::TYPE_WIDGET)
 389     return LoadManifest<Manifest::TYPE_WIDGET>(manifest_path, error);
 390
 391   *error = base::StringPrintf("%s", errors::kManifestUnreadable);
 392   return scoped_ptr<Manifest>();
 393 }
 394
 395 base::FilePath GetManifestPath(
 396     const base::FilePath& app_directory, Manifest::Type type) {
 397   base::FilePath manifest_path;
 398   switch (type) {
 399     case Manifest::TYPE_WIDGET:
 400       manifest_path = app_directory.Append(kManifestWgtFilename);
 401       break;
 402     case Manifest::TYPE_MANIFEST:
 403       manifest_path = app_directory.Append(kManifestXpkFilename);
 404       break;
 405     default:
 406       NOTREACHED();
 407   }
 408
 409   return manifest_path;
 410 }
 411
 412 scoped_refptr<ApplicationData> LoadApplication(
 413     const base::FilePath& app_root, const std::string& app_id,
 414     ApplicationData::SourceType source_type, Manifest::Type manifest_type,
 415     std::string* error) {
 416   base::FilePath manifest_path = GetManifestPath(app_root, manifest_type);
 417
 418   scoped_ptr<Manifest> manifest = LoadManifest(
 419       manifest_path, manifest_type, error);
 420   if (!manifest)
 421     return NULL;
 422
 423   return ApplicationData::Create(
 424       app_root, app_id, source_type, manifest.Pass(), error);
 425 }
 426
 427 base::FilePath ApplicationURLToRelativeFilePath(const GURL& url) {
 428   std::string url_path = url.path();
 429   if (url_path.empty() || url_path[0] != '/')
 430     return base::FilePath();
 431
 432   // Drop the leading slashes and convert %-encoded UTF8 to regular UTF8.
 433   std::string file_path = net::UnescapeURLComponent(url_path,
 434       net::UnescapeRule::SPACES | net::UnescapeRule::URL_SPECIAL_CHARS);
 435   size_t skip = file_path.find_first_not_of("/\\");
 436   if (skip != file_path.npos)
 437     file_path = file_path.substr(skip);
 438
 439   base::FilePath path =
 440 #if defined(OS_POSIX)
 441     base::FilePath(file_path);
 442 #elif defined(OS_WIN)
 443     base::FilePath(base::UTF8ToWide(file_path));
 444 #else
 445     base::FilePath();
 446     NOTIMPLEMENTED();
 447 #endif
 448
 449   // It's still possible for someone to construct an annoying URL whose path
 450   // would still wind up not being considered relative at this point.
 451   // For example: app://id/c:////foo.html
 452   if (path.IsAbsolute())
 453     return base::FilePath();
 454
 455   return path;
 456 }
 457
 458 }  // namespace application
 459 }  // namespace xwalk