Adds navigator.registerProtocolHandler.

chrome/browser/custom_handlers/protocol_handler_registry.cc

+#include "base/string_util.h"
+#include "chrome/browser/custom_handlers/protocol_handler_registry.h"
+#include "chrome/browser/custom_handlers/register_protocol_handler_infobar_delegate.h"
+#include "chrome/browser/child_process_security_policy.h"
+#include "chrome/browser/net/chrome_url_request_context.h"
+#include "chrome/common/pref_names.h"
+#include "net/url_request/url_request_redirect_job.h"
+#include "stdio.h"
+#include <iostream>
+
+// ProtocolHandler -------------------------------------------------------------
+
+ProtocolHandler::ProtocolHandler(const std::string& protocol, const std::string& url, const std::string& title)
+  :protocol_(protocol),
+   url_(url),
+   title_(title) {
+}
+
+ProtocolHandler* ProtocolHandler::CreateProtocolHandler(
+    const std::string& protocol, const std::string& url,
+    const std::string& title) {
+  // FIXME(koz) Check for bad protocol and url here.

[tony, 2011/02/07 20:51:45]

TODO(koz) is more common in chromium code.

[koz (OOO until 15th September), 2011/02/13 22:33:48]

Done.

+  std::string lowerProtocol(protocol);

[tony, 2011/02/07 20:51:45]

Nit: lower_protocol

[koz (OOO until 15th September), 2011/02/13 22:33:48]

Done.

+  lowerProtocol = StringToLowerASCII(protocol);
+  std::cout << "from " << protocol << " to " << lowerProtocol << std::endl;

[tony, 2011/02/07 20:51:45]

remove debugging code here and other places.  you could use LOG(INFO) for this.

[koz (OOO until 15th September), 2011/02/13 22:33:48]

Done.

+  return new ProtocolHandler(lowerProtocol, url, title);
+}
+
+ProtocolHandler* ProtocolHandler::CreateProtocolHandler(const DictionaryValue* value) {
+  std::string protocol, url, title;
+  value->GetString("protocol", &protocol);
+  value->GetString("url", &url);
+  value->GetString("title", &title);
+  return ProtocolHandler::CreateProtocolHandler(protocol, url, title);
+}
+
+GURL ProtocolHandler::TranslateUrl(const GURL& url) {
+  std::string urlToMangle = url.spec();
+  int offset = urlToMangle.find("://");
+  std::string remainder = urlToMangle.substr(offset + 3);

[tony, 2011/02/07 20:51:45]

You can use url_cannon::Replacements to change the scheme rather than mangling
the URL by hand.  It should be safer.

[koz (OOO until 15th September), 2011/02/13 22:33:48]

Right - we'd like to clear the scheme, but it is explicitly not supported by
GURL because it "doesn't make any sense" :-)

Concatenating each of the components that we do want doesn't work either - GURL
parses something like "search://foo" as a URL with an empty host and a path of
"//foo", so instead of pulling out the "foo" we get "//foo".

Given that we are dealing with fragments of URLs it is probably safer to deal
with strings instead of getting an unexpected parse like the above from a GURL.

+
+  return GURL(SpliceInto(url_, remainder));
+}
+
+Value* ProtocolHandler::Encode() {
+  DictionaryValue* d = new DictionaryValue();
+  d->Set("protocol", Value::CreateStringValue(protocol_));
+  d->Set("url", Value::CreateStringValue(url_));
+  d->Set("title", Value::CreateStringValue(title_));
+  return d;
+}
+
+std::string ProtocolHandler::SpliceInto(const std::string& templ, const std::string& value) {
+  std::string result(templ);
+  result.replace(result.find("%s"), 2, value);

[tony, 2011/02/07 20:51:45]

Can we share this code with the code for search engine keywords?

[koz (OOO until 15th September), 2011/02/13 22:33:48]

The search engine code just calls ReplaceSubstringsAfterOffset for this, so I've
changed my code to that.

+  return result;
+}
+
+// ProtocolHandlerRegistry -------------------------------------------------------------
+
+ProtocolHandlerRegistry::ProtocolHandlerRegistry(Profile* profile)
+  :profile_(profile) {
+  printf("New protocol handler registry!\n");
+}
+
+void ProtocolHandlerRegistry::RegisterProtocolHandler(ProtocolHandler* handler) {
+  if (protocolHandlers_.find(handler->protocol()) == protocolHandlers_.end()) {
+    ChildProcessSecurityPolicy* policy = ChildProcessSecurityPolicy::GetInstance();
+    if (!policy->IsWebSafeScheme(handler->protocol())) {
+      policy->RegisterWebSafeScheme(handler->protocol());
+    }
+    net::URLRequest::RegisterProtocolFactory(handler->protocol(), &ProtocolHandlerRegistry::Factory);
+  }
+  protocolHandlers_[handler->protocol()] = handler;
+}
+
+void ProtocolHandlerRegistry::Load() {
+  printf("Loading from profile.\n");
+  PrefService* prefs = profile_->GetPrefs();
+  if (!prefs->HasPrefPath(prefs::kRegisteredProtocolHandlers)) {
+    printf("Don't have a profile, cancelling load.\n");
+    return;
+  }
+  const DictionaryValue* dict = prefs->GetDictionary(prefs::kRegisteredProtocolHandlers);
+
+  for (DictionaryValue::key_iterator i = dict->begin_keys(); i != dict->end_keys(); ++i) {
+    DictionaryValue* value;
+    dict->GetDictionary(*i, &value);
+    RegisterHandlerFromValue(value);
+  }
+}
+
+void ProtocolHandlerRegistry::RegisterHandlerFromValue(const DictionaryValue* value) {
+  ProtocolHandler* handler = ProtocolHandler::CreateProtocolHandler(value);
+  if (handler) {
+    RegisterProtocolHandler(handler);
+  } else {
+    printf("Bad PH!\n");
+  }
+}
+
+void ProtocolHandlerRegistry::Save() {
+  printf("Saving to profile.\n");
+  Value* value = Encode();

[tony, 2011/02/07 20:51:45]

Can we use a scoped_ptr here?

[koz (OOO until 15th September), 2011/02/13 22:33:48]

Done.

+  profile_->GetPrefs()->Set(prefs::kRegisteredProtocolHandlers, *value);
+  profile_->GetPrefs()->ScheduleSavePersistentPrefs();
+  delete value;
+}
+
+net::URLRequestJob* ProtocolHandlerRegistry::CreateJob(net::URLRequest* request, const std::string& scheme) const {
+  ProtocolHandlerMap::const_iterator i = protocolHandlers_.find(scheme);
+  if (i == protocolHandlers_.end()) {
+    return NULL;
+  }
+
+  return new net::URLRequestRedirectJob(request, i->second->TranslateUrl(request->url()));
+}
+
+net::URLRequestJob* ProtocolHandlerRegistry::Factory(net::URLRequest* request,
+                                                const std::string& scheme) {
+  ChromeURLRequestContext* context = reinterpret_cast<ChromeURLRequestContext*>(request->context());
+  return context->protocol_handler_registry()->CreateJob(request, scheme);
+}
+
+Value* ProtocolHandlerRegistry::Encode() {
+  DictionaryValue* schemes = new DictionaryValue();
+
+  for (ProtocolHandlerMap::iterator i = protocolHandlers_.begin(); i != protocolHandlers_.end(); ++i) {
+    schemes->Set(i->first, i->second->Encode());
+  }
+  return schemes;
+}
+
+void ProtocolHandlerRegistry::OnAcceptRegisterProtocolHandler(ProtocolHandler* handler) {
+  RegisterProtocolHandler(handler);
+  Save();
+}
+
+void ProtocolHandlerRegistry::OnDenyRegisterProtocolHandler(ProtocolHandler* handler) {
+
+}
+
+void ProtocolHandlerRegistry::RegisterPrefs(PrefService* prefService) {
+  prefService->RegisterDictionaryPref(prefs::kRegisteredProtocolHandlers);
+}