Revert 188912 "Removed static factories for data, ftp, file, and..."

trunk/src/net/url_request/url_request_file_job.cc

Index: trunk/src/net/url_request/url_request_file_job.cc
===================================================================
--- trunk/src/net/url_request/url_request_file_job.cc	(revision 188924)
+++ trunk/src/net/url_request/url_request_file_job.cc	(working copy)
@@ -62,6 +62,34 @@
       weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)) {
 }
 
+// static
+URLRequestJob* URLRequestFileJob::Factory(URLRequest* request,
+                                          NetworkDelegate* network_delegate,
+                                          const std::string& scheme) {
+  base::FilePath file_path;
+  const bool is_file = FileURLToFilePath(request->url(), &file_path);
+
+  // Check file access permissions.
+  if (!network_delegate ||
+      !network_delegate->CanAccessFile(*request, file_path)) {
+    return new URLRequestErrorJob(request, network_delegate, ERR_ACCESS_DENIED);
+  }
+  // We need to decide whether to create URLRequestFileJob for file access or
+  // URLRequestFileDirJob for directory access. To avoid accessing the
+  // filesystem, we only look at the path string here.
+  // The code in the URLRequestFileJob::Start() method discovers that a path,
+  // which doesn't end with a slash, should really be treated as a directory,
+  // and it then redirects to the URLRequestFileDirJob.
+  if (is_file &&
+      file_util::EndsWithSeparator(file_path) &&
+      file_path.IsAbsolute())
+    return new URLRequestFileDirJob(request, network_delegate, file_path);
+
+  // Use a regular file request job for all non-directories (including invalid
+  // file names).
+  return new URLRequestFileJob(request, network_delegate, file_path);
+}
+
 void URLRequestFileJob::Start() {
   FileMetaInfo* meta_info = new FileMetaInfo();
   base::WorkerPool::PostTaskAndReply(