Move googleurl into the Chrome repo.

url/url_canon_stdurl.cc

+// Copyright 2007, 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 to canonicalize "standard" URLs, which are ones that have an
+// authority section including a host name.
+
+#include "googleurl/src/url_canon.h"
+#include "googleurl/src/url_canon_internal.h"
+
+namespace url_canon {
+
+namespace {
+
+template<typename CHAR, typename UCHAR>
+bool DoCanonicalizeStandardURL(const URLComponentSource<CHAR>& source,
+                               const url_parse::Parsed& parsed,
+                               CharsetConverter* query_converter,
+                               CanonOutput* output,
+                               url_parse::Parsed* new_parsed) {
+  // Scheme: this will append the colon.
+  bool success = CanonicalizeScheme(source.scheme, parsed.scheme,
+                                    output, &new_parsed->scheme);
+
+  // Authority (username, password, host, port)
+  bool have_authority;
+  if (parsed.username.is_valid() || parsed.password.is_valid() ||
+      parsed.host.is_nonempty() || parsed.port.is_valid()) {
+    have_authority = true;
+
+    // Only write the authority separators when we have a scheme.
+    if (parsed.scheme.is_valid()) {
+      output->push_back('/');
+      output->push_back('/');
+    }
+
+    // User info: the canonicalizer will handle the : and @.
+    success &= CanonicalizeUserInfo(source.username, parsed.username,
+                                    source.password, parsed.password,
+                                    output,
+                                    &new_parsed->username,
+                                    &new_parsed->password);
+
+    success &= CanonicalizeHost(source.host, parsed.host,
+                                output, &new_parsed->host);
+
+    // Host must not be empty for standard URLs.
+    if (!parsed.host.is_nonempty())
+      success = false;
+
+    // Port: the port canonicalizer will handle the colon.
+    int default_port = DefaultPortForScheme(
+        &output->data()[new_parsed->scheme.begin], new_parsed->scheme.len);
+    success &= CanonicalizePort(source.port, parsed.port, default_port,
+                                output, &new_parsed->port);
+  } else {
+    // No authority, clear the components.
+    have_authority = false;
+    new_parsed->host.reset();
+    new_parsed->username.reset();
+    new_parsed->password.reset();
+    new_parsed->port.reset();
+    success = false;  // Standard URLs must have an authority.
+  }
+
+  // Path
+  if (parsed.path.is_valid()) {
+    success &= CanonicalizePath(source.path, parsed.path,
+                                output, &new_parsed->path);
+  } else if (have_authority ||
+             parsed.query.is_valid() || parsed.ref.is_valid()) {
+    // When we have an empty path, make up a path when we have an authority
+    // or something following the path. The only time we allow an empty
+    // output path is when there is nothing else.
+    new_parsed->path = url_parse::Component(output->length(), 1);
+    output->push_back('/');
+  } else {
+    // No path at all
+    new_parsed->path.reset();
+  }
+
+  // Query
+  CanonicalizeQuery(source.query, parsed.query, query_converter,
+                    output, &new_parsed->query);
+
+  // Ref: ignore failure for this, since the page can probably still be loaded.
+  CanonicalizeRef(source.ref, parsed.ref, output, &new_parsed->ref);
+
+  return success;
+}
+
+}  // namespace
+
+
+// Returns the default port for the given canonical scheme, or PORT_UNSPECIFIED
+// if the scheme is unknown.
+int DefaultPortForScheme(const char* scheme, int scheme_len) {
+  int default_port = url_parse::PORT_UNSPECIFIED;
+  switch (scheme_len) {
+    case 4:
+      if (!strncmp(scheme, "http", scheme_len))
+        default_port = 80;
+      break;
+    case 5:
+      if (!strncmp(scheme, "https", scheme_len))
+        default_port = 443;
+      break;
+    case 3:
+      if (!strncmp(scheme, "ftp", scheme_len))
+        default_port = 21;
+      else if (!strncmp(scheme, "wss", scheme_len))
+        default_port = 443;
+      break;
+    case 6:
+      if (!strncmp(scheme, "gopher", scheme_len))
+        default_port = 70;
+      break;
+    case 2:
+      if (!strncmp(scheme, "ws", scheme_len))
+        default_port = 80;
+      break;
+  }
+  return default_port;
+}
+
+bool CanonicalizeStandardURL(const char* spec,
+                             int spec_len,
+                             const url_parse::Parsed& parsed,
+                             CharsetConverter* query_converter,
+                             CanonOutput* output,
+                             url_parse::Parsed* new_parsed) {
+  return DoCanonicalizeStandardURL<char, unsigned char>(
+      URLComponentSource<char>(spec), parsed, query_converter,
+      output, new_parsed);
+}
+
+bool CanonicalizeStandardURL(const char16* spec,
+                             int spec_len,
+                             const url_parse::Parsed& parsed,
+                             CharsetConverter* query_converter,
+                             CanonOutput* output,
+                             url_parse::Parsed* new_parsed) {
+  return DoCanonicalizeStandardURL<char16, char16>(
+      URLComponentSource<char16>(spec), parsed, query_converter,
+      output, new_parsed);
+}
+
+// It might be nice in the future to optimize this so unchanged components don't
+// need to be recanonicalized. This is especially true since the common case for
+// ReplaceComponents is removing things we don't want, like reference fragments
+// and usernames. These cases can become more efficient if we can assume the
+// rest of the URL is OK with these removed (or only the modified parts
+// recanonicalized). This would be much more complex to implement, however.
+//
+// You would also need to update DoReplaceComponents in url_util.cc which
+// relies on this re-checking everything (see the comment there for why).
+bool ReplaceStandardURL(const char* base,
+                        const url_parse::Parsed& base_parsed,
+                        const Replacements<char>& replacements,
+                        CharsetConverter* query_converter,
+                        CanonOutput* output,
+                        url_parse::Parsed* new_parsed) {
+  URLComponentSource<char> source(base);
+  url_parse::Parsed parsed(base_parsed);
+  SetupOverrideComponents(base, replacements, &source, &parsed);
+  return DoCanonicalizeStandardURL<char, unsigned char>(
+      source, parsed, query_converter, output, new_parsed);
+}
+
+// For 16-bit replacements, we turn all the replacements into UTF-8 so the
+// regular codepath can be used.
+bool ReplaceStandardURL(const char* base,
+                        const url_parse::Parsed& base_parsed,
+                        const Replacements<char16>& replacements,
+                        CharsetConverter* query_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 DoCanonicalizeStandardURL<char, unsigned char>(
+      source, parsed, query_converter, output, new_parsed);
+}
+
+}  // namespace url_canon