Merge pull request #2050 from ethcore/dapps-content

Fetching any content-addressed content

dapps/Cargo.toml

@@ -39,7 +39,7 @@ clippy = { version = "0.0.85", optional = true}
 serde_codegen = { version = "0.8", optional = true }
 
 [features]
-default = ["serde_codegen", "extra-dapps", "https-fetch/ca-github-only"]
+default = ["serde_codegen", "extra-dapps"]
 extra-dapps = ["parity-dapps-wallet"]
 nightly = ["serde_macros"]
 dev = ["clippy", "ethcore-rpc/dev", "ethcore-util/dev"]

dapps/src/apps/fetcher.rs

@@ -38,65 +38,65 @@ use handlers::{ContentHandler, ContentFetcherHandler, ContentValidator};
 use endpoint::{Endpoint, EndpointPath, Handler};
 use apps::cache::{ContentCache, ContentStatus};
 use apps::manifest::{MANIFEST_FILENAME, deserialize_manifest, serialize_manifest, Manifest};
-use apps::urlhint::{URLHintContract, URLHint};
+use apps::urlhint::{URLHintContract, URLHint, URLHintResult};
 
 const MAX_CACHED_DAPPS: usize = 10;
 
-pub struct AppFetcher<R: URLHint = URLHintContract> {
+pub struct ContentFetcher<R: URLHint = URLHintContract> {
 	dapps_path: PathBuf,
 	resolver: R,
+	cache: Arc<Mutex<ContentCache>>,
 	sync: Arc<SyncStatus>,
-	dapps: Arc<Mutex<ContentCache>>,
 }
 
-impl<R: URLHint> Drop for AppFetcher<R> {
+impl<R: URLHint> Drop for ContentFetcher<R> {
 	fn drop(&mut self) {
 		// Clear cache path
 		let _ = fs::remove_dir_all(&self.dapps_path);
 	}
 }
 
-impl<R: URLHint> AppFetcher<R> {
+impl<R: URLHint> ContentFetcher<R> {
 
 	pub fn new(resolver: R, sync_status: Arc<SyncStatus>) -> Self {
 		let mut dapps_path = env::temp_dir();
 		dapps_path.push(random_filename());
 
-		AppFetcher {
+		ContentFetcher {
 			dapps_path: dapps_path,
 			resolver: resolver,
 			sync: sync_status,
-			dapps: Arc::new(Mutex::new(ContentCache::default())),
+			cache: Arc::new(Mutex::new(ContentCache::default())),
 		}
 	}
 
 	#[cfg(test)]
-	fn set_status(&self, app_id: &str, status: ContentStatus) {
+	fn set_status(&self, content_id: &str, status: ContentStatus) {
-		self.dapps.lock().insert(app_id.to_owned(), status);
+		self.cache.lock().insert(content_id.to_owned(), status);
 	}
 
-	pub fn contains(&self, app_id: &str) -> bool {
+	pub fn contains(&self, content_id: &str) -> bool {
-		let mut dapps = self.dapps.lock();
+		let mut cache = self.cache.lock();
 		// Check if we already have the app
-		if dapps.get(app_id).is_some() {
+		if cache.get(content_id).is_some() {
 			return true;
 		}
 		// fallback to resolver
-		if let Ok(app_id) = app_id.from_hex() {
+		if let Ok(content_id) = content_id.from_hex() {
 			// if app_id is valid, but we are syncing always return true.
 			if self.sync.is_major_syncing() {
 				return true;
 			}
 			// else try to resolve the app_id
-			self.resolver.resolve(app_id).is_some()
+			self.resolver.resolve(content_id).is_some()
 		} else {
 			false
 		}
 	}
 
 	pub fn to_async_handler(&self, path: EndpointPath, control: hyper::Control) -> Box<Handler> {
-		let mut dapps = self.dapps.lock();
+		let mut cache = self.cache.lock();
-		let app_id = path.app_id.clone();
+		let content_id = path.app_id.clone();
 
 		if self.sync.is_major_syncing() {
 			return Box::new(ContentHandler::error(
@@ -108,7 +108,7 @@ impl<R: URLHint> AppFetcher<R> {
 		}
 
 		let (new_status, handler) = {
-			let status = dapps.get(&app_id);
+			let status = cache.get(&content_id);
 			match status {
 				// Just server dapp
 				Some(&mut ContentStatus::Ready(ref endpoint)) => {
@@ -125,24 +125,40 @@ impl<R: URLHint> AppFetcher<R> {
 				},
 				// We need to start fetching app
 				None => {
-					let app_hex = app_id.from_hex().expect("to_handler is called only when `contains` returns true.");
+					let content_hex = content_id.from_hex().expect("to_handler is called only when `contains` returns true.");
-					let app = self.resolver.resolve(app_hex);
+					let content = self.resolver.resolve(content_hex);
-
-					if let Some(app) = app {
 					let abort = Arc::new(AtomicBool::new(false));
 
-						(Some(ContentStatus::Fetching(abort.clone())), Box::new(ContentFetcherHandler::new(
+					match content {
-							app,
+						Some(URLHintResult::Dapp(dapp)) => (
+							Some(ContentStatus::Fetching(abort.clone())),
+							Box::new(ContentFetcherHandler::new(
+								dapp.url(),
 								abort,
 								control,
 								path.using_dapps_domains,
 								DappInstaller {
-								dapp_id: app_id.clone(),
+									id: content_id.clone(),
 									dapps_path: self.dapps_path.clone(),
-								dapps: self.dapps.clone(),
+									cache: self.cache.clone(),
+								})) as Box<Handler>
+						),
+						Some(URLHintResult::Content(content)) => (
+							Some(ContentStatus::Fetching(abort.clone())),
+							Box::new(ContentFetcherHandler::new(
+								content.url,
+								abort,
+								control,
+								path.using_dapps_domains,
+								ContentInstaller {
+									id: content_id.clone(),
+									mime: content.mime,
+									content_path: self.dapps_path.clone(),
+									cache: self.cache.clone(),
 								}
-						)) as Box<Handler>)
+							)) as Box<Handler>,
-					} else {
+						),
+						None => {
 							// This may happen when sync status changes in between
 							// `contains` and `to_handler`
 							(None, Box::new(ContentHandler::error(
@@ -151,14 +167,15 @@ impl<R: URLHint> AppFetcher<R> {
 								"Requested resource was not found.",
 								None
 							)) as Box<Handler>)
+						},
 					}
 				},
 			}
 		};
 
 		if let Some(status) = new_status {
-			dapps.clear_garbage(MAX_CACHED_DAPPS);
+			cache.clear_garbage(MAX_CACHED_DAPPS);
-			dapps.insert(app_id, status);
+			cache.insert(content_id, status);
 		}
 
 		handler
@@ -169,7 +186,7 @@ impl<R: URLHint> AppFetcher<R> {
 pub enum ValidationError {
 	Io(io::Error),
 	Zip(zip::result::ZipError),
-	InvalidDappId,
+	InvalidContentId,
 	ManifestNotFound,
 	ManifestSerialization(String),
 	HashMismatch { expected: H256, got: H256, },
@@ -180,7 +197,7 @@ impl fmt::Display for ValidationError {
 		match *self {
 			ValidationError::Io(ref io) => write!(f, "Unexpected IO error occured: {:?}", io),
 			ValidationError::Zip(ref zip) => write!(f, "Unable to read ZIP archive: {:?}", zip),
-			ValidationError::InvalidDappId => write!(f, "Dapp ID is invalid. It should be 32 bytes hash of content."),
+			ValidationError::InvalidContentId => write!(f, "ID is invalid. It should be 256 bits keccak hash of content."),
 			ValidationError::ManifestNotFound => write!(f, "Downloaded Dapp bundle did not contain valid manifest.json file."),
 			ValidationError::ManifestSerialization(ref err) => {
 				write!(f, "There was an error during Dapp Manifest serialization: {:?}", err)
@@ -204,10 +221,55 @@ impl From<zip::result::ZipError> for ValidationError {
 	}
 }
 
+struct ContentInstaller {
+	id: String,
+	mime: String,
+	content_path: PathBuf,
+	cache: Arc<Mutex<ContentCache>>,
+}
+
+impl ContentValidator for ContentInstaller {
+	type Error = ValidationError;
+	type Result = PathBuf;
+
+	fn validate_and_install(&self, path: PathBuf) -> Result<(String, PathBuf), ValidationError> {
+		// Create dir
+		try!(fs::create_dir_all(&self.content_path));
+
+		// And prepare path for a file
+		let filename = path.file_name().expect("We always fetch a file.");
+		let mut content_path = self.content_path.clone();
+		content_path.push(&filename);
+
+		if content_path.exists() {
+			try!(fs::remove_dir_all(&content_path))
+		}
+
+		try!(fs::copy(&path, &content_path));
+
+		Ok((self.id.clone(), content_path))
+	}
+
+	fn done(&self, result: Option<&PathBuf>) {
+		let mut cache = self.cache.lock();
+		match result {
+			Some(result) => {
+				let page = LocalPageEndpoint::single_file(result.clone(), self.mime.clone());
+				cache.insert(self.id.clone(), ContentStatus::Ready(page));
+			},
+			// In case of error
+			None => {
+				cache.remove(&self.id);
+			},
+		}
+	}
+}
+
+
 struct DappInstaller {
-	dapp_id: String,
+	id: String,
 	dapps_path: PathBuf,
-	dapps: Arc<Mutex<ContentCache>>,
+	cache: Arc<Mutex<ContentCache>>,
 }
 
 impl DappInstaller {
@@ -244,15 +306,16 @@ impl DappInstaller {
 
 impl ContentValidator for DappInstaller {
 	type Error = ValidationError;
+	type Result = Manifest;
 
-	fn validate_and_install(&self, app_path: PathBuf) -> Result<Manifest, ValidationError> {
+	fn validate_and_install(&self, app_path: PathBuf) -> Result<(String, Manifest), ValidationError> {
 		trace!(target: "dapps", "Opening dapp bundle at {:?}", app_path);
 		let mut file_reader = io::BufReader::new(try!(fs::File::open(app_path)));
 		let hash = try!(sha3(&mut file_reader));
-		let dapp_id = try!(self.dapp_id.as_str().parse().map_err(|_| ValidationError::InvalidDappId));
+		let id = try!(self.id.as_str().parse().map_err(|_| ValidationError::InvalidContentId));
-		if dapp_id != hash {
+		if id != hash {
 			return Err(ValidationError::HashMismatch {
-				expected: dapp_id,
+				expected: id,
 				got: hash,
 			});
 		}
@@ -262,7 +325,7 @@ impl ContentValidator for DappInstaller {
 		// First find manifest file
 		let (mut manifest, manifest_dir) = try!(Self::find_manifest(&mut zip));
 		// Overwrite id to match hash
-		manifest.id = self.dapp_id.clone();
+		manifest.id = self.id.clone();
 
 		let target = self.dapp_target_path(&manifest);
 
@@ -300,20 +363,20 @@ impl ContentValidator for DappInstaller {
 		try!(manifest_file.write_all(manifest_str.as_bytes()));
 
 		// Return modified app manifest
-		Ok(manifest)
+		Ok((manifest.id.clone(), manifest))
 	}
 
 	fn done(&self, manifest: Option<&Manifest>) {
-		let mut dapps = self.dapps.lock();
+		let mut cache = self.cache.lock();
 		match manifest {
 			Some(manifest) => {
 				let path = self.dapp_target_path(manifest);
 				let app = LocalPageEndpoint::new(path, manifest.clone().into());
-				dapps.insert(self.dapp_id.clone(), ContentStatus::Ready(app));
+				cache.insert(self.id.clone(), ContentStatus::Ready(app));
 			},
 			// In case of error
 			None => {
-				dapps.remove(&self.dapp_id);
+				cache.remove(&self.id);
 			},
 		}
 	}
@@ -327,12 +390,12 @@ mod tests {
 	use endpoint::EndpointInfo;
 	use page::LocalPageEndpoint;
 	use apps::cache::ContentStatus;
-	use apps::urlhint::{GithubApp, URLHint};
+	use apps::urlhint::{URLHint, URLHintResult};
-	use super::AppFetcher;
+	use super::ContentFetcher;
 
 	struct FakeResolver;
 	impl URLHint for FakeResolver {
-		fn resolve(&self, _app_id: Bytes) -> Option<GithubApp> {
+		fn resolve(&self, _id: Bytes) -> Option<URLHintResult> {
 			None
 		}
 	}
@@ -341,7 +404,7 @@ mod tests {
 	fn should_true_if_contains_the_app() {
 		// given
 		let path = env::temp_dir();
-		let fetcher = AppFetcher::new(FakeResolver, Arc::new(|| false));
+		let fetcher = ContentFetcher::new(FakeResolver, Arc::new(|| false));
 		let handler = LocalPageEndpoint::new(path, EndpointInfo {
 			name: "fake".into(),
 			description: "".into(),

dapps/src/apps/urlhint.rs

@@ -17,6 +17,7 @@
 use std::fmt;
 use std::sync::Arc;
 use rustc_serialize::hex::ToHex;
+use mime_guess;
 
 use ethabi::{Interface, Contract, Token};
 use util::{Address, Bytes, Hashable};
@@ -52,6 +53,13 @@ impl GithubApp {
 	}
 }
 
+#[derive(Debug, PartialEq)]
+pub struct Content {
+	pub url: String,
+	pub mime: String,
+	pub owner: Address,
+}
+
 /// RAW Contract interface.
 /// Should execute transaction using current blockchain state.
 pub trait ContractClient: Send + Sync {
@@ -61,10 +69,19 @@ pub trait ContractClient: Send + Sync {
 	fn call(&self, address: Address, data: Bytes) -> Result<Bytes, String>;
 }
 
+/// Result of resolving id to URL
+#[derive(Debug, PartialEq)]
+pub enum URLHintResult {
+	/// Dapp
+	Dapp(GithubApp),
+	/// Content
+	Content(Content),
+}
+
 /// URLHint Contract interface
 pub trait URLHint {
 	/// Resolves given id to registrar entry.
-	fn resolve(&self, app_id: Bytes) -> Option<GithubApp>;
+	fn resolve(&self, id: Bytes) -> Option<URLHintResult>;
 }
 
 pub struct URLHintContract {
@@ -110,10 +127,10 @@ impl URLHintContract {
 		}
 	}
 
-	fn encode_urlhint_call(&self, app_id: Bytes) -> Option<Bytes> {
+	fn encode_urlhint_call(&self, id: Bytes) -> Option<Bytes> {
 		let call = self.urlhint
 			.function("entries".into())
-			.and_then(|f| f.encode_call(vec![Token::FixedBytes(app_id)]));
+			.and_then(|f| f.encode_call(vec![Token::FixedBytes(id)]));
 
 		match call {
 			Ok(res) => {
@@ -126,7 +143,7 @@ impl URLHintContract {
 		}
 	}
 
-	fn decode_urlhint_output(&self, output: Bytes) -> Option<GithubApp> {
+	fn decode_urlhint_output(&self, output: Bytes) -> Option<URLHintResult> {
 		trace!(target: "dapps", "Output: {:?}", output.to_hex());
 		let output = self.urlhint
 			.function("entries".into())
@@ -149,6 +166,17 @@ impl URLHintContract {
 					if owner == Address::default() {
 						return None;
 					}
+
+					let commit = GithubApp::commit(&commit);
+					if commit == Some(Default::default()) {
+						let mime = guess_mime_type(&account_slash_repo).unwrap_or("application/octet-stream".into());
+						return Some(URLHintResult::Content(Content {
+							url: account_slash_repo,
+							mime: mime,
+							owner: owner,
+						}));
+					}
+
 					let (account, repo) = {
 						let mut it = account_slash_repo.split('/');
 						match (it.next(), it.next()) {
@@ -157,12 +185,12 @@ impl URLHintContract {
 						}
 					};
 
-					GithubApp::commit(&commit).map(|commit| GithubApp {
+					commit.map(|commit| URLHintResult::Dapp(GithubApp {
 						account: account,
 						repo: repo,
 						commit: commit,
 						owner: owner,
-					})
+					}))
 				},
 				e => {
 					warn!(target: "dapps", "Invalid contract output parameters: {:?}", e);
@@ -177,10 +205,10 @@ impl URLHintContract {
 }
 
 impl URLHint for URLHintContract {
-	fn resolve(&self, app_id: Bytes) -> Option<GithubApp> {
+	fn resolve(&self, id: Bytes) -> Option<URLHintResult> {
 		self.urlhint_address().and_then(|address| {
 			// Prepare contract call
-			self.encode_urlhint_call(app_id)
+			self.encode_urlhint_call(id)
 				.and_then(|data| {
 					let call = self.client.call(address, data);
 					if let Err(ref e) = call {
@@ -193,6 +221,34 @@ impl URLHint for URLHintContract {
 	}
 }
 
+fn guess_mime_type(url: &str) -> Option<String> {
+	const CONTENT_TYPE: &'static str = "content-type=";
+
+	let mut it = url.split('#');
+	// skip url
+	let url = it.next();
+	// get meta headers
+	let metas = it.next();
+	if let Some(metas) = metas {
+		for meta in metas.split('&') {
+			let meta = meta.to_lowercase();
+			if meta.starts_with(CONTENT_TYPE) {
+				return Some(meta[CONTENT_TYPE.len()..].to_owned());
+			}
+		}
+	}
+	url.and_then(|url| {
+		url.split('.').last()
+	}).and_then(|extension| {
+		mime_guess::get_mime_type_str(extension).map(Into::into)
+	})
+}
+
+#[cfg(test)]
+pub fn test_guess_mime_type(url: &str) -> Option<String> {
+	guess_mime_type(url)
+}
+
 fn as_string<T: fmt::Debug>(e: T) -> String {
 	format!("{:?}", e)
 }
@@ -201,7 +257,7 @@ fn as_string<T: fmt::Debug>(e: T) -> String {
 mod tests {
 	use std::sync::Arc;
 	use std::str::FromStr;
-	use rustc_serialize::hex::{ToHex, FromHex};
+	use rustc_serialize::hex::FromHex;
 
 	use super::*;
 	use util::{Bytes, Address, Mutex, ToPretty};
@@ -279,12 +335,33 @@ mod tests {
 		let res = urlhint.resolve("test".bytes().collect());
 
 		// then
-		assert_eq!(res, Some(GithubApp {
+		assert_eq!(res, Some(URLHintResult::Dapp(GithubApp {
 			account: "ethcore".into(),
 			repo: "dao.claim".into(),
 			commit: GithubApp::commit(&"ec4c1fe06c808fe3739858c347109b1f5f1ed4b5".from_hex().unwrap()).unwrap(),
 			owner: Address::from_str("deadcafebeefbeefcafedeaddeedfeedffffffff").unwrap(),
-		}))
+		})))
+	}
+
+	#[test]
+	fn should_decode_urlhint_content_output() {
+		// given
+		let mut registrar = FakeRegistrar::new();
+		registrar.responses = Mutex::new(vec![
+			Ok(format!("000000000000000000000000{}", URLHINT).from_hex().unwrap()),
+			Ok("00000000000000000000000000000000000000000000000000000000000000600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000deadcafebeefbeefcafedeaddeedfeedffffffff000000000000000000000000000000000000000000000000000000000000003d68747470733a2f2f657468636f72652e696f2f6173736574732f696d616765732f657468636f72652d626c61636b2d686f72697a6f6e74616c2e706e67000000".from_hex().unwrap()),
+		]);
+		let urlhint = URLHintContract::new(Arc::new(registrar));
+
+		// when
+		let res = urlhint.resolve("test".bytes().collect());
+
+		// then
+		assert_eq!(res, Some(URLHintResult::Content(Content {
+			url: "https://ethcore.io/assets/images/ethcore-black-horizontal.png".into(),
+			mime: "image/png".into(),
+			owner: Address::from_str("deadcafebeefbeefcafedeaddeedfeedffffffff").unwrap(),
+		})))
 	}
 
 	#[test]
@@ -303,4 +380,20 @@ mod tests {
 		// then
 		assert_eq!(url, "https://codeload.github.com/test/xyz/zip/000102030405060708090a0b0c0d0e0f10111213".to_owned());
 	}
+
+	#[test]
+	fn should_guess_mime_type_from_url() {
+		let url1 = "https://ethcore.io/parity";
+		let url2 = "https://ethcore.io/parity#content-type=image/png";
+		let url3 = "https://ethcore.io/parity#something&content-type=image/png";
+		let url4 = "https://ethcore.io/parity.png#content-type=image/jpeg";
+		let url5 = "https://ethcore.io/parity.png";
+
+
+		assert_eq!(test_guess_mime_type(url1), None);
+		assert_eq!(test_guess_mime_type(url2), Some("image/png".into()));
+		assert_eq!(test_guess_mime_type(url3), Some("image/png".into()));
+		assert_eq!(test_guess_mime_type(url4), Some("image/jpeg".into()));
+		assert_eq!(test_guess_mime_type(url5), Some("image/png".into()));
+	}
 }

dapps/src/handlers/client/mod.rs

@@ -63,7 +63,7 @@ impl Client {
 		self.https_client.close();
 	}
 
-	pub fn request(&mut self, url: String, abort: Arc<AtomicBool>, on_done: Box<Fn() + Send>) -> Result<mpsc::Receiver<FetchResult>, FetchError> {
+	pub fn request(&mut self, url: &str, abort: Arc<AtomicBool>, on_done: Box<Fn() + Send>) -> Result<mpsc::Receiver<FetchResult>, FetchError> {
 		let is_https = url.starts_with("https://");
 		let url = try!(url.parse().map_err(|_| FetchError::InvalidUrl));
 		trace!(target: "dapps", "Fetching from: {:?}", url);

dapps/src/handlers/fetch.rs

@@ -16,7 +16,7 @@
 
 //! Hyper Server Handler that fetches a file during a request (proxy).
 
-use std::fmt;
+use std::{fs, fmt};
 use std::path::PathBuf;
 use std::sync::{mpsc, Arc};
 use std::sync::atomic::AtomicBool;
@@ -29,51 +29,50 @@ use hyper::status::StatusCode;
 use handlers::ContentHandler;
 use handlers::client::{Client, FetchResult};
 use apps::redirection_address;
-use apps::urlhint::GithubApp;
-use apps::manifest::Manifest;
 
 const FETCH_TIMEOUT: u64 = 30;
 
-enum FetchState {
+enum FetchState<T: fmt::Debug> {
-	NotStarted(GithubApp),
+	NotStarted(String),
 	Error(ContentHandler),
 	InProgress {
 		deadline: Instant,
 		receiver: mpsc::Receiver<FetchResult>,
 	},
-	Done(Manifest),
+	Done((String, T)),
 }
 
 pub trait ContentValidator {
 	type Error: fmt::Debug + fmt::Display;
+	type Result: fmt::Debug;
 
-	fn validate_and_install(&self, app: PathBuf) -> Result<Manifest, Self::Error>;
+	fn validate_and_install(&self, app: PathBuf) -> Result<(String, Self::Result), Self::Error>;
-	fn done(&self, Option<&Manifest>);
+	fn done(&self, Option<&Self::Result>);
 }
 
 pub struct ContentFetcherHandler<H: ContentValidator> {
 	abort: Arc<AtomicBool>,
 	control: Option<Control>,
-	status: FetchState,
+	status: FetchState<H::Result>,
 	client: Option<Client>,
 	using_dapps_domains: bool,
-	dapp: H,
+	installer: H,
 }
 
 impl<H: ContentValidator> Drop for ContentFetcherHandler<H> {
 	fn drop(&mut self) {
-		let manifest = match self.status {
+		let result = match self.status {
-			FetchState::Done(ref manifest) => Some(manifest),
+			FetchState::Done((_, ref result)) => Some(result),
 			_ => None,
 		};
-		self.dapp.done(manifest);
+		self.installer.done(result);
 	}
 }
 
 impl<H: ContentValidator> ContentFetcherHandler<H> {
 
 	pub fn new(
-		app: GithubApp,
+		url: String,
 		abort: Arc<AtomicBool>,
 		control: Control,
 		using_dapps_domains: bool,
@@ -84,9 +83,9 @@ impl<H: ContentValidator> ContentFetcherHandler<H> {
 			abort: abort,
 			control: Some(control),
 			client: Some(client),
-			status: FetchState::NotStarted(app),
+			status: FetchState::NotStarted(url),
 			using_dapps_domains: using_dapps_domains,
-			dapp: handler,
+			installer: handler,
 		}
 	}
 
@@ -97,8 +96,8 @@ impl<H: ContentValidator> ContentFetcherHandler<H> {
 	}
 
 
-	fn fetch_app(client: &mut Client, app: &GithubApp, abort: Arc<AtomicBool>, control: Control) -> Result<mpsc::Receiver<FetchResult>, String> {
+	fn fetch_content(client: &mut Client, url: &str, abort: Arc<AtomicBool>, control: Control) -> Result<mpsc::Receiver<FetchResult>, String> {
-		client.request(app.url(), abort, Box::new(move || {
+		client.request(url, abort, Box::new(move || {
 			trace!(target: "dapps", "Fetching finished.");
 			// Ignoring control errors
 			let _ = control.ready(Next::read());
@@ -108,14 +107,14 @@ impl<H: ContentValidator> ContentFetcherHandler<H> {
 
 impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<H> {
 	fn on_request(&mut self, request: server::Request<HttpStream>) -> Next {
-		let status = if let FetchState::NotStarted(ref app) = self.status {
+		let status = if let FetchState::NotStarted(ref url) = self.status {
 			Some(match *request.method() {
 				// Start fetching content
 				Method::Get => {
-					trace!(target: "dapps", "Fetching dapp: {:?}", app);
+					trace!(target: "dapps", "Fetching content from: {:?}", url);
 					let control = self.control.take().expect("on_request is called only once, thus control is always Some");
 					let client = self.client.as_mut().expect("on_request is called before client is closed.");
-					let fetch = Self::fetch_app(client, app, self.abort.clone(), control);
+					let fetch = Self::fetch_content(client, url, self.abort.clone(), control);
 					match fetch {
 						Ok(receiver) => FetchState::InProgress {
 							deadline: Instant::now() + Duration::from_secs(FETCH_TIMEOUT),
@@ -154,7 +153,7 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 				let timeout = ContentHandler::error(
 					StatusCode::GatewayTimeout,
 					"Download Timeout",
-					&format!("Could not fetch dapp bundle within {} seconds.", FETCH_TIMEOUT),
+					&format!("Could not fetch content within {} seconds.", FETCH_TIMEOUT),
 					None
 				);
 				Self::close_client(&mut self.client);
@@ -166,32 +165,31 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 				match rec {
 					// Unpack and validate
 					Ok(Ok(path)) => {
-						trace!(target: "dapps", "Fetching dapp finished. Starting validation.");
+						trace!(target: "dapps", "Fetching content finished. Starting validation ({:?})", path);
 						Self::close_client(&mut self.client);
 						// Unpack and verify
-						let state = match self.dapp.validate_and_install(path.clone()) {
+						let state = match self.installer.validate_and_install(path.clone()) {
 							Err(e) => {
-								trace!(target: "dapps", "Error while validating dapp: {:?}", e);
+								trace!(target: "dapps", "Error while validating content: {:?}", e);
 								FetchState::Error(ContentHandler::error(
 									StatusCode::BadGateway,
 									"Invalid Dapp",
-									"Downloaded bundle does not contain a valid dapp.",
+									"Downloaded bundle does not contain a valid content.",
 									Some(&format!("{:?}", e))
 								))
 							},
-							Ok(manifest) => FetchState::Done(manifest)
+							Ok(result) => FetchState::Done(result)
 						};
 						// Remove temporary zip file
-						// TODO [todr] Uncomment me
+						let _ = fs::remove_file(path);
-						// let _ = fs::remove_file(path);
 						(Some(state), Next::write())
 					},
 					Ok(Err(e)) => {
-						warn!(target: "dapps", "Unable to fetch new dapp: {:?}", e);
+						warn!(target: "dapps", "Unable to fetch content: {:?}", e);
 						let error = ContentHandler::error(
 							StatusCode::BadGateway,
 							"Download Error",
-							"There was an error when fetching the dapp.",
+							"There was an error when fetching the content.",
 							Some(&format!("{:?}", e)),
 						);
 						(Some(FetchState::Error(error)), Next::write())
@@ -213,10 +211,10 @@ impl<H: ContentValidator> server::Handler<HttpStream> for ContentFetcherHandler<
 
 	fn on_response(&mut self, res: &mut server::Response) -> Next {
 		match self.status {
-			FetchState::Done(ref manifest) => {
+			FetchState::Done((ref id, _)) => {
-				trace!(target: "dapps", "Fetching dapp finished. Redirecting to {}", manifest.id);
+				trace!(target: "dapps", "Fetching content finished. Redirecting to {}", id);
 				res.set_status(StatusCode::Found);
-				res.headers_mut().set(header::Location(redirection_address(self.using_dapps_domains, &manifest.id)));
+				res.headers_mut().set(header::Location(redirection_address(self.using_dapps_domains, id)));
 				Next::write()
 			},
 			FetchState::Error(ref mut handler) => handler.on_response(res),

dapps/src/lib.rs

@@ -191,7 +191,7 @@ impl Server {
 	) -> Result<Server, ServerError> {
 		let panic_handler = Arc::new(Mutex::new(None));
 		let authorization = Arc::new(authorization);
-		let apps_fetcher = Arc::new(apps::fetcher::AppFetcher::new(apps::urlhint::URLHintContract::new(registrar), sync_status));
+		let content_fetcher = Arc::new(apps::fetcher::ContentFetcher::new(apps::urlhint::URLHintContract::new(registrar), sync_status));
 		let endpoints = Arc::new(apps::all_endpoints(dapps_path));
 		let special = Arc::new({
 			let mut special = HashMap::new();
@@ -206,7 +206,7 @@ impl Server {
 			.handle(move |ctrl| router::Router::new(
 				ctrl,
 				apps::main_page(),
-				apps_fetcher.clone(),
+				content_fetcher.clone(),
 				endpoints.clone(),
 				special.clone(),
 				authorization.clone(),

dapps/src/page/local.rs

@@ -17,20 +17,30 @@
 use mime_guess;
 use std::io::{Seek, Read, SeekFrom};
 use std::fs;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use page::handler;
 use endpoint::{Endpoint, EndpointInfo, EndpointPath, Handler};
 
 pub struct LocalPageEndpoint {
 	path: PathBuf,
-	info: EndpointInfo,
+	mime: Option<String>,
+	info: Option<EndpointInfo>,
 }
 
 impl LocalPageEndpoint {
 	pub fn new(path: PathBuf, info: EndpointInfo) -> Self {
 		LocalPageEndpoint {
 			path: path,
-			info: info,
+			mime: None,
+			info: Some(info),
+		}
+	}
+
+	pub fn single_file(path: PathBuf, mime: String) -> Self {
+		LocalPageEndpoint {
+			path: path,
+			mime: Some(mime),
+			info: None,
 		}
 	}
 
@@ -41,32 +51,47 @@ impl LocalPageEndpoint {
 
 impl Endpoint for LocalPageEndpoint {
 	fn info(&self) -> Option<&EndpointInfo> {
-		Some(&self.info)
+		self.info.as_ref()
 	}
 
 	fn to_handler(&self, path: EndpointPath) -> Box<Handler> {
+		if let Some(ref mime) = self.mime {
 			Box::new(handler::PageHandler {
-			app: LocalDapp::new(self.path.clone()),
+				app: LocalSingleFile { path: self.path.clone(), mime: mime.clone() },
+				prefix: None,
+				path: path,
+				file: Default::default(),
+				safe_to_embed: false,
+			})
+		} else {
+			Box::new(handler::PageHandler {
+				app: LocalDapp { path: self.path.clone() },
 				prefix: None,
 				path: path,
 				file: Default::default(),
 				safe_to_embed: false,
 			})
 		}
+	}
+}
+
+struct LocalSingleFile {
+	path: PathBuf,
+	mime: String,
+}
+
+impl handler::Dapp for LocalSingleFile {
+	type DappFile = LocalFile;
+
+	fn file(&self, _path: &str) -> Option<Self::DappFile> {
+		LocalFile::from_path(&self.path, Some(&self.mime))
+	}
 }
 
 struct LocalDapp {
 	path: PathBuf,
 }
 
-impl LocalDapp {
-	fn new(path: PathBuf) -> Self {
-		LocalDapp {
-			path: path
-		}
-	}
-}
-
 impl handler::Dapp for LocalDapp {
 	type DappFile = LocalFile;
 
@@ -75,18 +100,7 @@ impl handler::Dapp for LocalDapp {
 		for part in file_path.split('/') {
 			path.push(part);
 		}
-		// Check if file exists
+		LocalFile::from_path(&path, None)
-		fs::File::open(path.clone()).ok().map(|file| {
-			let content_type = mime_guess::guess_mime_type(path);
-			let len = file.metadata().ok().map_or(0, |meta| meta.len());
-			LocalFile {
-				content_type: content_type.to_string(),
-				buffer: [0; 4096],
-				file: file,
-				pos: 0,
-				len: len,
-			}
-		})
 	}
 }
 
@@ -98,6 +112,24 @@ struct LocalFile {
 	pos: u64,
 }
 
+impl LocalFile {
+	fn from_path<P: AsRef<Path>>(path: P, mime: Option<&str>) -> Option<Self> {
+		// Check if file exists
+		fs::File::open(&path).ok().map(|file| {
+			let content_type = mime.map(|mime| mime.to_owned())
+				.unwrap_or_else(|| mime_guess::guess_mime_type(path).to_string());
+			let len = file.metadata().ok().map_or(0, |meta| meta.len());
+			LocalFile {
+				content_type: content_type,
+				buffer: [0; 4096],
+				file: file,
+				pos: 0,
+				len: len,
+			}
+		})
+	}
+}
+
 impl handler::DappFile for LocalFile {
 	fn content_type(&self) -> &str {
 		&self.content_type

dapps/src/router/mod.rs

@@ -27,7 +27,7 @@ use url::{Url, Host};
 use hyper::{self, server, Next, Encoder, Decoder, Control, StatusCode};
 use hyper::net::HttpStream;
 use apps;
-use apps::fetcher::AppFetcher;
+use apps::fetcher::ContentFetcher;
 use endpoint::{Endpoint, Endpoints, EndpointPath};
 use handlers::{Redirection, extract_url, ContentHandler};
 use self::auth::{Authorization, Authorized};
@@ -45,7 +45,7 @@ pub struct Router<A: Authorization + 'static> {
 	control: Option<Control>,
 	main_page: &'static str,
 	endpoints: Arc<Endpoints>,
-	fetch: Arc<AppFetcher>,
+	fetch: Arc<ContentFetcher>,
 	special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
 	authorization: Arc<A>,
 	allowed_hosts: Option<Vec<String>>,
@@ -136,7 +136,7 @@ impl<A: Authorization> Router<A> {
 	pub fn new(
 		control: Control,
 		main_page: &'static str,
-		app_fetcher: Arc<AppFetcher>,
+		content_fetcher: Arc<ContentFetcher>,
 		endpoints: Arc<Endpoints>,
 		special: Arc<HashMap<SpecialEndpoint, Box<Endpoint>>>,
 		authorization: Arc<A>,
@@ -148,7 +148,7 @@ impl<A: Authorization> Router<A> {
 			control: Some(control),
 			main_page: main_page,
 			endpoints: endpoints,
-			fetch: app_fetcher,
+			fetch: content_fetcher,
 			special: special,
 			authorization: authorization,
 			allowed_hosts: allowed_hosts,

dapps/src/tests/helpers.rs

@@ -17,7 +17,7 @@
 use std::env;
 use std::str;
 use std::sync::Arc;
-use rustc_serialize::hex::{ToHex, FromHex};
+use rustc_serialize::hex::FromHex;
 
 use ServerBuilder;
 use Server;