Web Based Dapps (#3956)

* Dapps web

Conflicts:
	dapps/src/apps/fetcher.rs
	dapps/src/handlers/fetch.rs

* Rewriting fetch

* Parity-wide fetch service

* Obey the limits and support cancellation.

* Removing temporary files.

* Actually use Fetch for dapps

* Re-implementing file fetching to avoid temporary files.

* Serde to 0.8.19

* Fixing content & dapps fetch

* Serving web content and injecting scripts

* Don't wait for old content, start a new download

* Supporting timeouts and query

* Simple GUI for the browser

* Proxy tokens validation

* Recovering from invalid web-based requests

* Remember last visisted URL

* Removing unused variables

* Addressing review comments

* Setting default account in web3

* Adding WebBrowser dapp to the list

* Actually prune old entries when generating new token

parity/dapps.rs

@@ -21,6 +21,7 @@ use ethcore::client::Client;
 use ethsync::SyncProvider;
 use helpers::replace_home;
 use dir::default_data_path;
+use rpc_apis::SignerService;
 use hash_fetch::fetch::Client as FetchClient;
 use parity_reactor::Remote;
 
@@ -57,6 +58,7 @@ pub struct Dependencies {
 	pub sync: Arc<SyncProvider>,
 	pub remote: Remote,
 	pub fetch: FetchClient,
+	pub signer: Arc<SignerService>,
 }
 
 pub fn new(configuration: Configuration, deps: Dependencies) -> Result<Option<WebappServer>, String> {
@@ -64,7 +66,6 @@ pub fn new(configuration: Configuration, deps: Dependencies) -> Result<Option<We
 		return Ok(None);
 	}
 
-	let signer_address = deps.apis.signer_service.address();
 	let url = format!("{}:{}", configuration.interface, configuration.port);
 	let addr = try!(url.parse().map_err(|_| format!("Invalid Webapps listen host/port given: {}", url)));
 
@@ -79,7 +80,7 @@ pub fn new(configuration: Configuration, deps: Dependencies) -> Result<Option<We
 		(username.to_owned(), password)
 	});
 
-	Ok(Some(try!(setup_dapps_server(deps, configuration.dapps_path, &addr, configuration.hosts, auth, signer_address))))
+	Ok(Some(try!(setup_dapps_server(deps, configuration.dapps_path, &addr, configuration.hosts, auth))))
 }
 
 pub use self::server::WebappServer;
@@ -97,7 +98,6 @@ mod server {
 		_url: &SocketAddr,
 		_allowed_hosts: Option<Vec<String>>,
 		_auth: Option<(String, String)>,
-		_signer_address: Option<(String, u16)>,
 	) -> Result<WebappServer, String> {
 		Err("Your Parity version has been compiled without WebApps support.".into())
 	}
@@ -126,7 +126,6 @@ mod server {
 		url: &SocketAddr,
 		allowed_hosts: Option<Vec<String>>,
 		auth: Option<(String, String)>,
-		signer_address: Option<(String, u16)>,
 	) -> Result<WebappServer, String> {
 		use ethcore_dapps as dapps;
 
@@ -137,9 +136,12 @@ mod server {
 		);
 		let sync = deps.sync.clone();
 		let client = deps.client.clone();
+		let signer = deps.signer.clone();
+
 		server.with_fetch(deps.fetch.clone());
 		server.with_sync_status(Arc::new(move || is_major_importing(Some(sync.status().state), client.queue_info())));
-		server.with_signer_address(signer_address);
+		server.with_web_proxy_tokens(Arc::new(move |token| signer.is_valid_web_proxy_access_token(&token)));
+		server.with_signer_address(deps.signer.address());
 
 		let server = rpc_apis::setup_rpc(server, deps.apis.clone(), rpc_apis::ApiSet::UnsafeContext);
 		let start_result = match auth {

parity/run.rs

@@ -370,6 +370,7 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 		sync: sync_provider.clone(),
 		remote: event_loop.remote(),
 		fetch: fetch.clone(),
+		signer: deps_for_rpc_apis.signer_service.clone(),
 	};
 	let dapps_server = try!(dapps::new(cmd.dapps_conf.clone(), dapps_deps));