// Copyright 2013 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Functions to canonicalize "standard" URLs, which are ones that have an // authority section including a host name. #include "url/url_canon.h" #include "url/url_canon_internal.h" #include "url/url_constants.h" namespace url { namespace { template bool DoCanonicalizeStandardURL(const URLComponentSource& source, const Parsed& parsed, CharsetConverter* query_converter, CanonOutput* output, 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 = 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 = PORT_UNSPECIFIED; switch (scheme_len) { case 4: if (!strncmp(scheme, kHttpScheme, scheme_len)) default_port = 80; break; case 5: if (!strncmp(scheme, kHttpsScheme, scheme_len)) default_port = 443; break; case 3: if (!strncmp(scheme, kFtpScheme, scheme_len)) default_port = 21; else if (!strncmp(scheme, kWssScheme, scheme_len)) default_port = 443; break; case 6: if (!strncmp(scheme, kGopherScheme, scheme_len)) default_port = 70; break; case 2: if (!strncmp(scheme, kWsScheme, scheme_len)) default_port = 80; break; } return default_port; } bool CanonicalizeStandardURL(const char* spec, int spec_len, const Parsed& parsed, CharsetConverter* query_converter, CanonOutput* output, Parsed* new_parsed) { return DoCanonicalizeStandardURL( URLComponentSource(spec), parsed, query_converter, output, new_parsed); } bool CanonicalizeStandardURL(const base::char16* spec, int spec_len, const Parsed& parsed, CharsetConverter* query_converter, CanonOutput* output, Parsed* new_parsed) { return DoCanonicalizeStandardURL( URLComponentSource(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 Parsed& base_parsed, const Replacements& replacements, CharsetConverter* query_converter, CanonOutput* output, Parsed* new_parsed) { URLComponentSource source(base); Parsed parsed(base_parsed); SetupOverrideComponents(base, replacements, &source, &parsed); return DoCanonicalizeStandardURL( source, parsed, query_converter, output, new_parsed); } // For 16-bit replacements, we turn all the replacements into UTF-8 so the // regular code path can be used. bool ReplaceStandardURL(const char* base, const Parsed& base_parsed, const Replacements& replacements, CharsetConverter* query_converter, CanonOutput* output, Parsed* new_parsed) { RawCanonOutput<1024> utf8; URLComponentSource source(base); Parsed parsed(base_parsed); SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed); return DoCanonicalizeStandardURL( source, parsed, query_converter, output, new_parsed); } } // namespace url