Move googleurl into the Chrome repo.

url/url_canon_filesystemurl.cc

+// Copyright 2012, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Functions for canonicalizing "filesystem:file:" URLs.
+
+#include "googleurl/src/url_canon.h"
+#include "googleurl/src/url_canon_internal.h"
+#include "googleurl/src/url_file.h"
+#include "googleurl/src/url_parse_internal.h"
+#include "googleurl/src/url_util.h"
+#include "googleurl/src/url_util_internal.h"
+
+namespace url_canon {
+
+namespace {
+
+// We use the URLComponentSource for the outer URL, as it can have replacements,
+// whereas the inner_url can't, so it uses spec.
+template<typename CHAR, typename UCHAR>
+bool DoCanonicalizeFileSystemURL(const CHAR* spec,
+                                 const URLComponentSource<CHAR>& source,
+                                 const url_parse::Parsed& parsed,
+                                 CharsetConverter* charset_converter,
+                                 CanonOutput* output,
+                                 url_parse::Parsed* new_parsed) {
+  // filesystem only uses {scheme, path, query, ref} -- clear the rest.
+  new_parsed->username = url_parse::Component();
+  new_parsed->password = url_parse::Component();
+  new_parsed->host = url_parse::Component();
+  new_parsed->port = url_parse::Component();
+
+  const url_parse::Parsed* inner_parsed = parsed.inner_parsed();
+  url_parse::Parsed new_inner_parsed;
+
+  // Scheme (known, so we don't bother running it through the more
+  // complicated scheme canonicalizer).
+  new_parsed->scheme.begin = output->length();
+  output->Append("filesystem:", 11);
+  new_parsed->scheme.len = 10;
+
+  if (!parsed.inner_parsed() || !parsed.inner_parsed()->scheme.is_valid())
+    return false;
+
+  bool success = true;
+  if (url_util::CompareSchemeComponent(spec, inner_parsed->scheme,
+      url_util::kFileScheme)) {
+    new_inner_parsed.scheme.begin = output->length();
+    output->Append("file://", 7);
+    new_inner_parsed.scheme.len = 4;
+    success &= CanonicalizePath(spec, inner_parsed->path, output,
+                                &new_inner_parsed.path);
+  } else if (url_util::IsStandard(spec, inner_parsed->scheme)) {
+    success =
+        url_canon::CanonicalizeStandardURL(spec,
+                                           parsed.inner_parsed()->Length(),
+                                           *parsed.inner_parsed(),
+                                           charset_converter, output,
+                                           &new_inner_parsed);
+  } else {
+    // TODO(ericu): The URL is wrong, but should we try to output more of what
+    // we were given?  Echoing back filesystem:mailto etc. doesn't seem all that
+    // useful.
+    return false;
+  }
+  // The filesystem type must be more than just a leading slash for validity.
+  success &= parsed.inner_parsed()->path.len > 1;
+
+  success &= CanonicalizePath(source.path, parsed.path, output,
+                              &new_parsed->path);
+
+  // Ignore failures for query/ref since the URL can probably still be loaded.
+  CanonicalizeQuery(source.query, parsed.query, charset_converter,
+                    output, &new_parsed->query);
+  CanonicalizeRef(source.ref, parsed.ref, output, &new_parsed->ref);
+  if (success)
+    new_parsed->set_inner_parsed(new_inner_parsed);
+
+  return success;
+}
+
+}  // namespace
+
+bool CanonicalizeFileSystemURL(const char* spec,
+                               int spec_len,
+                               const url_parse::Parsed& parsed,
+                               CharsetConverter* charset_converter,
+                               CanonOutput* output,
+                               url_parse::Parsed* new_parsed) {
+  return DoCanonicalizeFileSystemURL<char, unsigned char>(
+      spec, URLComponentSource<char>(spec), parsed, charset_converter, output,
+      new_parsed);
+}
+
+bool CanonicalizeFileSystemURL(const char16* spec,
+                               int spec_len,
+                               const url_parse::Parsed& parsed,
+                               CharsetConverter* charset_converter,
+                               CanonOutput* output,
+                               url_parse::Parsed* new_parsed) {
+  return DoCanonicalizeFileSystemURL<char16, char16>(
+      spec, URLComponentSource<char16>(spec), parsed, charset_converter, output,
+      new_parsed);
+}
+
+bool ReplaceFileSystemURL(const char* base,
+                          const url_parse::Parsed& base_parsed,
+                          const Replacements<char>& replacements,
+                          CharsetConverter* charset_converter,
+                          CanonOutput* output,
+                          url_parse::Parsed* new_parsed) {
+  URLComponentSource<char> source(base);
+  url_parse::Parsed parsed(base_parsed);
+  SetupOverrideComponents(base, replacements, &source, &parsed);
+  return DoCanonicalizeFileSystemURL<char, unsigned char>(
+      base, source, parsed, charset_converter, output, new_parsed);
+}
+
+bool ReplaceFileSystemURL(const char* base,
+                          const url_parse::Parsed& base_parsed,
+                          const Replacements<char16>& replacements,
+                          CharsetConverter* charset_converter,
+                          CanonOutput* output,
+                          url_parse::Parsed* new_parsed) {
+  RawCanonOutput<1024> utf8;
+  URLComponentSource<char> source(base);
+  url_parse::Parsed parsed(base_parsed);
+  SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed);
+  return DoCanonicalizeFileSystemURL<char, unsigned char>(
+      base, source, parsed, charset_converter, output, new_parsed);
+}
+
+}  // namespace url_canon