Handle webuis when using the network service.

content/browser/webui/url_data_manager_backend.h

 // Copyright (c) 2012 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.
 
 #ifndef CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
 #define CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_
 
 #include <map>
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/supports_user_data.h"
 #include "base/values.h"
 #include "content/browser/webui/url_data_manager.h"
 #include "content/public/browser/url_data_source.h"
+#include "net/http/http_response_headers.h"
 #include "net/url_request/url_request_job_factory.h"
 
 class GURL;
 
 namespace base {
 class RefCountedMemory;
 }
 
 namespace content {
 
 class ChromeBlobStorageContext;
 class ResourceContext;
 class URLDataManagerBackend;
 class URLDataSourceImpl;
 class URLRequestChromeJob;
 
 // URLDataManagerBackend is used internally by ChromeURLDataManager on the IO
 // thread. In most cases you can use the API in ChromeURLDataManager and ignore
 // this class. URLDataManagerBackend is owned by ResourceContext.
 class URLDataManagerBackend : public base::SupportsUserData::Data {
  public:
   typedef int RequestID;
 
   URLDataManagerBackend();
   ~URLDataManagerBackend() override;
 
-  // Invoked to create the protocol handler for chrome://. |is_incognito| should

[scottmg, 2017/05/05 22:38:10]

Just to confirm, the is_incognito was being passed through everywhere, but never
used, so you just cleaned it up, right?

[jam, 2017/05/05 23:25:07]

Right

-  // be set for incognito profiles. Called on the UI thread.
+  // Invoked to create the protocol handler for chrome://. Called on the UI
+  // thread.
   CONTENT_EXPORT static std::unique_ptr<
       net::URLRequestJobFactory::ProtocolHandler>
-  CreateProtocolHandler(content::ResourceContext* resource_context,
-                        bool is_incognito,
+  CreateProtocolHandler(ResourceContext* resource_context,
                         ChromeBlobStorageContext* blob_storage_context);
 
   // Adds a DataSource to the collection of data sources.
   void AddDataSource(URLDataSourceImpl* source);
 
   void UpdateWebUIDataSource(const std::string& source_name,
                              const base::DictionaryValue& update);
 
   // DataSource invokes this. Sends the data to the URLRequest. |bytes| may be
   // null, which signals an error handling the request.
   void DataAvailable(RequestID request_id, base::RefCountedMemory* bytes);
 
-  static net::URLRequestJob* Factory(net::URLRequest* request,
-                                     const std::string& scheme);
+  // Look up the data source for the request. Returns the source if it is found,
+  // else NULL.
+  URLDataSourceImpl* GetDataSourceFromURL(const GURL& url);
+
+  // Creates and sets the response headers for the given request.
+  static scoped_refptr<net::HttpResponseHeaders> GetHeaders(
+      URLDataSourceImpl* source,
+      const std::string& path,
+      const std::string& origin);
+
+  // Returns whether |url| passes some sanity checks and is a valid GURL.
+  static bool CheckURLIsValid(const GURL& url);
+
+  // Parse |url| to get the path which will be used to resolve the request. The
+  // path is the remaining portion after the scheme and hostname.
+  static void URLToRequestPath(const GURL& url, std::string* path);
 
  private:
   friend class URLRequestChromeJob;
 
   typedef std::map<std::string,
       scoped_refptr<URLDataSourceImpl> > DataSourceMap;
   typedef std::map<RequestID, URLRequestChromeJob*> PendingRequestMap;
 
   // Called by the job when it's starting up.
   // Returns false if |url| is not a URL managed by this object.
   bool StartRequest(const net::URLRequest* request, URLRequestChromeJob* job);
 
   // Helper function to call StartDataRequest on |source|'s delegate. This is
   // needed because while we want to call URLDataSourceDelegate's method, we
   // need to add a refcount on the source.
   static void CallStartRequest(
       scoped_refptr<URLDataSourceImpl> source,
       const std::string& path,
       const ResourceRequestInfo::WebContentsGetter& wc_getter,
       int request_id);
 
   // Remove a request from the list of pending requests.
   void RemoveRequest(URLRequestChromeJob* job);
 
   // Returns true if the job exists in |pending_requests_|. False otherwise.
   // Called by ~URLRequestChromeJob to verify that |pending_requests_| is kept
   // up to date.
   bool HasPendingJob(URLRequestChromeJob* job) const;
 
-  // Look up the data source for the request. Returns the source if it is found,
-  // else NULL.
-  URLDataSourceImpl* GetDataSourceFromURL(const GURL& url);
-
   // Custom sources of data, keyed by source path (e.g. "favicon").
   DataSourceMap data_sources_;
 
   // All pending URLRequestChromeJobs, keyed by ID of the request.
   // URLRequestChromeJob calls into this object when it's constructed and
   // destructed to ensure that the pointers in this map remain valid.
   PendingRequestMap pending_requests_;
 
   // The ID we'll use for the next request we receive.
   RequestID next_request_id_;
 
   DISALLOW_COPY_AND_ASSIGN(URLDataManagerBackend);
 };
 
-// Creates protocol handler for chrome-devtools://. |is_incognito| should be
-// set for incognito profiles.
-net::URLRequestJobFactory::ProtocolHandler*
-CreateDevToolsProtocolHandler(content::ResourceContext* resource_context,
-                              bool is_incognito);
+// Creates protocol handler for chrome-devtools://.
+net::URLRequestJobFactory::ProtocolHandler* CreateDevToolsProtocolHandler(
+    ResourceContext* resource_context);
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_WEBUI_URL_DATA_MANAGER_BACKEND_H_