Inject parity script to all dapps // Expand dapps to any ZIP file (#7260)

* Inject Parity script to all HTML dapps pages

* Small glitch

* Add injection test

* Add Special GHH commit value for serving ZIP files as DAPPS

* Refactor GithubDapp fetcher

* PR Grumbles

dapps/src/apps/fetcher/mod.rs

@@ -200,39 +200,57 @@ impl<R: URLHint + 'static, F: Fetch> Endpoint for ContentFetcher<F, R> {
 						Some(URLHintResult::Dapp(_)) if self.only_content => {
 							(None, Self::dapps_disabled(self.embeddable_on.clone()))
 						},
-						Some(URLHintResult::Dapp(dapp)) => {
-							let handler = ContentFetcherHandler::new(
-								req.method(),
-								&dapp.url(),
-								path,
-								installers::Dapp::new(
-									content_id.clone(),
-									self.cache_path.clone(),
-									Box::new(on_done),
-									self.embeddable_on.clone(),
-									self.pool.clone(),
-								),
-								self.embeddable_on.clone(),
-								self.fetch.clone(),
-							);
-
-							(Some(ContentStatus::Fetching(handler.fetch_control())), Box::new(handler) as endpoint::Response)
-						},
-						Some(URLHintResult::Content(content)) => {
-							let handler = ContentFetcherHandler::new(
-								req.method(),
-								&content.url,
-								path,
-								installers::Content::new(
-									content_id.clone(),
-									content.mime,
-									self.cache_path.clone(),
-									Box::new(on_done),
-									self.pool.clone(),
-								),
-								self.embeddable_on.clone(),
-								self.fetch.clone(),
-							);
+						Some(content) => {
+							let handler = match content {
+								URLHintResult::Dapp(dapp) => {
+									ContentFetcherHandler::new(
+										req.method(),
+										&dapp.url(),
+										path,
+										installers::Dapp::new(
+											content_id.clone(),
+											self.cache_path.clone(),
+											Box::new(on_done),
+											self.embeddable_on.clone(),
+											self.pool.clone(),
+										),
+										self.embeddable_on.clone(),
+										self.fetch.clone(),
+									)
+								},
+							    URLHintResult::GithubDapp(content) => {
+									ContentFetcherHandler::new(
+										req.method(),
+										&content.url,
+										path,
+										installers::Dapp::new(
+											content_id.clone(),
+											self.cache_path.clone(),
+											Box::new(on_done),
+											self.embeddable_on.clone(),
+											self.pool.clone(),
+										),
+										self.embeddable_on.clone(),
+										self.fetch.clone(),
+									)
+							    },
+								URLHintResult::Content(content) => {
+									ContentFetcherHandler::new(
+										req.method(),
+										&content.url,
+										path,
+										installers::Content::new(
+											content_id.clone(),
+											content.mime,
+											self.cache_path.clone(),
+											Box::new(on_done),
+											self.pool.clone(),
+										),
+										self.embeddable_on.clone(),
+										self.fetch.clone(),
+									)
+								},
+							};
 
 							(Some(ContentStatus::Fetching(handler.fetch_control())), Box::new(handler) as endpoint::Response)
 						},

dapps/src/page/handler.rs

@@ -17,8 +17,9 @@
 use std::io;
 use std::time::{Duration, SystemTime};
 use hyper::{self, header, StatusCode};
-use hyper::mime::Mime;
+use hyper::mime::{self, Mime};
 
+use apps;
 use handlers::{Reader, ContentHandler, add_security_headers};
 use {Embeddable};
 
@@ -95,7 +96,18 @@ impl<T: DappFile> PageHandler<T> {
 			add_security_headers(&mut headers, self.safe_to_embed_on);
 		}
 
-		let (reader, body) = Reader::pair(file.into_reader(), Vec::new());
+		let initial_content = if file.content_type().to_owned() == mime::TEXT_HTML {
+			let content = &format!(
+				r#"<script src="/{}/inject.js"></script>"#,
+				apps::UTILS_PATH,
+			);
+
+			content.as_bytes().to_vec()
+		} else {
+			Vec::new()
+		};
+
+		let (reader, body) = Reader::pair(file.into_reader(), initial_content);
 		res.set_body(body);
 		(Some(reader), res)
 	}

dapps/src/tests/fetch.rs

@@ -166,14 +166,15 @@ fn should_return_fetched_dapp_content() {
 
 	response1.assert_status("HTTP/1.1 200 OK");
 	assert_security_headers_for_embed(&response1.headers);
-	assert_eq!(
-		response1.body,
-		r#"18
+	assert!(
+		response1.body.contains(r#"18
 <h1>Hello Gavcoin!</h1>
 
 0
 
-"#
+"#),
+		"Expected Gavcoin body: {}",
+		response1.body
 	);
 
 	response2.assert_status("HTTP/1.1 200 OK");

dapps/src/tests/home.rs

@@ -60,3 +60,32 @@ fn should_serve_home() {
 	response.assert_header("Content-Type", "text/html");
 	assert_security_headers(&response.headers);
 }
+
+
+#[test]
+fn should_inject_js() {
+	// given
+	let server = serve_ui();
+
+	// when
+	let response = request(server,
+		"\
+			GET / HTTP/1.1\r\n\
+			Host: 127.0.0.1:8080\r\n\
+			Connection: close\r\n\
+			\r\n\
+			{}
+		"
+	);
+
+	// then
+	response.assert_status("HTTP/1.1 200 OK");
+	response.assert_header("Content-Type", "text/html");
+	assert_eq!(
+		response.body.contains(r#"/inject.js"></script>"#),
+		true,
+		"Expected inject script tag in: {}",
+		response.body
+	);
+	assert_security_headers(&response.headers);
+}

hash-fetch/src/client.rs

@@ -150,6 +150,9 @@ impl<F: Fetch + 'static> HashFetch for Client<F> {
 					URLHintResult::Dapp(dapp) => {
 						dapp.url()
 					},
+					URLHintResult::GithubDapp(content) => {
+						content.url
+					},
 					URLHintResult::Content(content) => {
 						content.url
 					},

hash-fetch/src/urlhint.rs

@@ -32,6 +32,10 @@ use bytes::Bytes;
 pub type BoxFuture<A, B> = Box<Future<Item = A, Error = B> + Send>;
 
 const COMMIT_LEN: usize = 20;
+/// GithubHint entries with commit set as `0x0..01` should be treated
+/// as Github Dapp, downloadable zip files, than can be extracted, containing
+/// the manifest.json file along with the dapp
+static GITHUB_DAPP_COMMIT: &[u8; COMMIT_LEN] = &[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1];
 
 /// RAW Contract interface.
 /// Should execute transaction using current blockchain state.
@@ -93,6 +97,8 @@ pub struct Content {
 pub enum URLHintResult {
 	/// Dapp
 	Dapp(GithubApp),
+	/// GithubDapp
+	GithubDapp(Content),
 	/// Content
 	Content(Content),
 }
@@ -122,6 +128,15 @@ impl URLHintContract {
 	}
 }
 
+fn get_urlhint_content(account_slash_repo: String, owner: Address) -> Content {
+	let mime = guess_mime_type(&account_slash_repo).unwrap_or(mime::APPLICATION_JSON);
+	Content {
+		url: account_slash_repo,
+		mime,
+		owner,
+	}
+}
+
 fn decode_urlhint_output(output: (String, ::bigint::hash::H160, Address)) -> Option<URLHintResult> {
 	let (account_slash_repo, commit, owner) = output;
 
@@ -130,13 +145,15 @@ fn decode_urlhint_output(output: (String, ::bigint::hash::H160, Address)) -> Opt
 	}
 
 	let commit = GithubApp::commit(&commit);
+
 	if commit == Some(Default::default()) {
-		let mime = guess_mime_type(&account_slash_repo).unwrap_or(mime::APPLICATION_JSON);
-		return Some(URLHintResult::Content(Content {
-			url: account_slash_repo,
-			mime: mime,
-			owner: owner,
-		}));
+		let content = get_urlhint_content(account_slash_repo, owner);
+		return Some(URLHintResult::Content(content));
+	}
+
+	if commit == Some(*GITHUB_DAPP_COMMIT) {
+		let content = get_urlhint_content(account_slash_repo, owner);
+		return Some(URLHintResult::GithubDapp(content));
 	}
 
 	let (account, repo) = {