More CLI settings for IPFS API (#4608)

* TEMP: Bind to 0.0.0.0, don't check Origin

* More CLI options for IPFS

* CORS and Hosts filtering

* Allow current interface as origin

* Correctly handle CORS settings

* fix grumbles

Cargo.lock

@@ -1640,6 +1640,7 @@ dependencies = [
  "ethcore 1.6.0",
  "ethcore-util 1.6.0",
  "hyper 0.10.0-a.0 (git+https://github.com/ethcore/hyper)",
+ "jsonrpc-http-server 6.0.0 (git+https://github.com/ethcore/jsonrpc.git)",
  "mime 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "multihash 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rlp 0.1.0",

ipfs/Cargo.toml

@@ -8,6 +8,7 @@ authors = ["Parity Technologies <admin@parity.io>"]
 [dependencies]
 ethcore = { path = "../ethcore" }
 ethcore-util = { path = "../util" }
+jsonrpc-http-server = { git = "https://github.com/ethcore/jsonrpc.git" }
 rlp = { path = "../util/rlp" }
 mime = "0.2"
 hyper = { default-features = false, git = "https://github.com/ethcore/hyper" }

ipfs/src/error.rs

@@ -15,7 +15,7 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use {multihash, cid, hyper};
-use handler::Out;
+use route::Out;
 
 pub type Result<T> = ::std::result::Result<T, Error>;
 
@@ -26,6 +26,8 @@ pub enum ServerError {
 	IoError(::std::io::Error),
 	/// Other `hyper` error
 	Other(hyper::error::Error),
+	/// Invalid --ipfs-api-interface
+	InvalidInterface
 }
 
 #[derive(Debug, PartialEq)]
@@ -89,6 +91,7 @@ impl From<ServerError> for String {
 		match err {
 			ServerError::IoError(err) => err.to_string(),
 			ServerError::Other(err) => err.to_string(),
+			ServerError::InvalidInterface => "Invalid --ipfs-api-interface parameter".into(),
 		}
 	}
 }

ipfs/src/lib.rs

@@ -23,21 +23,91 @@ extern crate cid;
 extern crate rlp;
 extern crate ethcore;
 extern crate ethcore_util as util;
+extern crate jsonrpc_http_server;
 
-mod error;
+pub mod error;
-mod handler;
+mod route;
 
 use std::io::Write;
 use std::sync::Arc;
-use std::net::{SocketAddr, IpAddr, Ipv4Addr};
+use std::net::{SocketAddr, IpAddr};
 use error::ServerError;
-use handler::{IpfsHandler, Out};
+use route::Out;
+use jsonrpc_http_server::cors;
 use hyper::server::{Listening, Handler, Request, Response};
 use hyper::net::HttpStream;
-use hyper::header::{ContentLength, ContentType, Origin};
+use hyper::header::{Vary, ContentLength, ContentType, AccessControlAllowOrigin};
 use hyper::{Next, Encoder, Decoder, Method, RequestUri, StatusCode};
 use ethcore::client::BlockChainClient;
 
+
+/// Request/response handler
+pub struct IpfsHandler {
+	/// Response to send out
+	out: Out,
+	/// How many bytes from the response have been written
+	out_progress: usize,
+	/// Origin request header
+	origin: Option<String>,
+	/// Allowed CORS domains
+	cors_domains: Option<Vec<AccessControlAllowOrigin>>,
+	/// Hostnames allowed in the `Host` request header
+	allowed_hosts: Option<Vec<String>>,
+	/// Reference to the Blockchain Client
+	client: Arc<BlockChainClient>,
+}
+
+impl IpfsHandler {
+	pub fn client(&self) -> &BlockChainClient {
+		&*self.client
+	}
+
+	pub fn new(cors: Option<Vec<String>>, hosts: Option<Vec<String>>, client: Arc<BlockChainClient>) -> Self {
+		fn origin_to_header(origin: String) -> AccessControlAllowOrigin {
+			match origin.as_str() {
+				"*" => AccessControlAllowOrigin::Any,
+				"null" | "" => AccessControlAllowOrigin::Null,
+				_ => AccessControlAllowOrigin::Value(origin),
+			}
+		}
+
+		IpfsHandler {
+			out: Out::Bad("Invalid Request"),
+			out_progress: 0,
+			origin: None,
+			cors_domains: cors.map(|vec| vec.into_iter().map(origin_to_header).collect()),
+			allowed_hosts: hosts,
+			client: client,
+		}
+	}
+
+	fn is_host_allowed(&self, req: &Request<HttpStream>) -> bool {
+		match self.allowed_hosts {
+			Some(ref hosts) => jsonrpc_http_server::is_host_header_valid(&req, hosts),
+			None => true,
+		}
+	}
+
+	fn is_origin_allowed(&self) -> bool {
+		// Check origin header first, no header passed is good news
+		let origin = match self.origin {
+			Some(ref origin) => origin,
+			None => return true,
+		};
+
+		let cors_domains = match self.cors_domains {
+			Some(ref domains) => domains,
+			None => return false,
+		};
+
+		cors_domains.iter().any(|domain| match *domain {
+			AccessControlAllowOrigin::Value(ref allowed) => origin == allowed,
+			AccessControlAllowOrigin::Any => true,
+			AccessControlAllowOrigin::Null => origin == "",
+		})
+	}
+}
+
 /// Implement Hyper's HTTP handler
 impl Handler<HttpStream> for IpfsHandler {
 	fn on_request(&mut self, req: Request<HttpStream>) -> Next {
@@ -45,9 +115,16 @@ impl Handler<HttpStream> for IpfsHandler {
 			return Next::write();
 		}
 
-		// Reject requests if the Origin header isn't valid
+		self.origin = cors::read_origin(&req);
-		if req.headers().get::<Origin>().map(|o| "127.0.0.1" != &o.host.hostname).unwrap_or(false) {
+
-			self.out = Out::Bad("Illegal Origin");
+		if !self.is_host_allowed(&req) {
+			self.out = Out::Bad("Disallowed Host header");
+
+			return Next::write();
+		}
+
+		if !self.is_origin_allowed() {
+			self.out = Out::Bad("Disallowed Origin header");
 
 			return Next::write();
 		}
@@ -57,7 +134,9 @@ impl Handler<HttpStream> for IpfsHandler {
 			_ => return Next::write(),
 		};
 
-		self.route(path, query)
+		self.out = self.route(path, query);
+
+		Next::write()
 	}
 
 	fn on_request_readable(&mut self, _decoder: &mut Decoder<HttpStream>) -> Next {
@@ -82,25 +161,27 @@ impl Handler<HttpStream> for IpfsHandler {
 				res.headers_mut().set(ContentLength(bytes.len() as u64));
 				res.headers_mut().set(ContentType(content_type));
 
-				Next::write()
 			},
 			NotFound(reason) => {
 				res.set_status(StatusCode::NotFound);
 
 				res.headers_mut().set(ContentLength(reason.len() as u64));
 				res.headers_mut().set(ContentType(mime!(Text/Plain)));
-
-				Next::write()
 			},
 			Bad(reason) => {
 				res.set_status(StatusCode::BadRequest);
 
 				res.headers_mut().set(ContentLength(reason.len() as u64));
 				res.headers_mut().set(ContentType(mime!(Text/Plain)));
-
-				Next::write()
 			}
 		}
+
+		if let Some(cors_header) = cors::get_cors_header(&self.cors_domains, &self.origin) {
+			res.headers_mut().set(cors_header);
+			res.headers_mut().set(Vary::Items(vec!["Origin".into()]));
+		}
+
+		Next::write()
 	}
 
 	fn on_response_writable(&mut self, transport: &mut Encoder<HttpStream>) -> Next {
@@ -116,11 +197,12 @@ impl Handler<HttpStream> for IpfsHandler {
 	}
 }
 
+/// Attempt to write entire `data` from current `progress`
 fn write_chunk<W: Write>(transport: &mut W, progress: &mut usize, data: &[u8]) -> Next {
 	// Skip any bytes that have already been written
 	let chunk = &data[*progress..];
 
-	// Write an get written count
+	// Write an get the amount of bytes written. End the connection in case of an error.
 	let written = match transport.write(chunk) {
 		Ok(written) => written,
 		Err(_) => return Next::end(),
@@ -128,7 +210,7 @@ fn write_chunk<W: Write>(transport: &mut W, progress: &mut usize, data: &[u8]) -
 
 	*progress += written;
 
-	// Close the connection if the entire chunk has been written, otherwise increment progress
+	// Close the connection if the entire remaining chunk has been written
 	if written < chunk.len() {
 		Next::write()
 	} else {
@@ -136,12 +218,31 @@ fn write_chunk<W: Write>(transport: &mut W, progress: &mut usize, data: &[u8]) -
 	}
 }
 
-pub fn start_server(port: u16, client: Arc<BlockChainClient>) -> Result<Listening, ServerError> {
+/// Add current interface (default: "127.0.0.1:5001") to list of allowed hosts
-	let addr = SocketAddr::new(IpAddr::V4(Ipv4Addr::new(127, 0, 0, 1)), port);
+fn include_current_interface(mut hosts: Vec<String>, interface: String, port: u16) -> Vec<String> {
+	hosts.push(match port {
+		80 => interface,
+		_ => format!("{}:{}", interface, port),
+	});
+
+	hosts
+}
+
+pub fn start_server(
+	port: u16,
+	interface: String,
+	cors: Option<Vec<String>>,
+	hosts: Option<Vec<String>>,
+	client: Arc<BlockChainClient>
+) -> Result<Listening, ServerError> {
+
+	let ip: IpAddr = interface.parse().map_err(|_| ServerError::InvalidInterface)?;
+	let addr = SocketAddr::new(ip, port);
+	let hosts = hosts.map(move |hosts| include_current_interface(hosts, interface, port));
 
 	Ok(
 		hyper::Server::http(&addr)?
-			.handle(move |_| IpfsHandler::new(client.clone()))
+			.handle(move |_| IpfsHandler::new(cors.clone(), hosts.clone(), client.clone()))
 			.map(|(listening, srv)| {
 
 				::std::thread::spawn(move || {

ipfs/src/route.rs

@@ -14,15 +14,13 @@
 // You should have received a copy of the GNU General Public License
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
-use {rlp, multihash};
+use {rlp, multihash, IpfsHandler};
 use error::{Error, Result};
 use cid::{ToCid, Codec};
 
-use std::sync::Arc;
 use multihash::Hash;
-use hyper::Next;
 use util::{Bytes, H256};
-use ethcore::client::{BlockId, TransactionId, BlockChainClient};
+use ethcore::client::{BlockId, TransactionId};
 
 type Reason = &'static str;
 
@@ -34,30 +32,10 @@ pub enum Out {
 	Bad(Reason),
 }
 
-/// Request/response handler
-pub struct IpfsHandler {
-	/// Reference to the Blockchain Client
-	client: Arc<BlockChainClient>,
-
-	/// Response to send out
-	pub out: Out,
-
-	/// How many bytes from the response have been written
-	pub out_progress: usize,
-}
-
 impl IpfsHandler {
-	pub fn new(client: Arc<BlockChainClient>) -> Self {
-		IpfsHandler {
-			client: client,
-			out: Out::Bad("Invalid Request"),
-			out_progress: 0,
-		}
-	}
-
 	/// Route path + query string to a specialized method
-	pub fn route(&mut self, path: &str, query: Option<&str>) -> Next {
+	pub fn route(&self, path: &str, query: Option<&str>) -> Out {
-		self.out = match path {
+		match path {
 			"/api/v0/block/get" => {
 				let arg = query.and_then(|q| get_param(q, "arg")).unwrap_or("");
 
@@ -65,9 +43,7 @@ impl IpfsHandler {
 			},
 
 			_ => Out::NotFound("Route not found")
-		};
+		}
-
-		Next::write()
 	}
 
 	/// Attempt to read Content ID from `arg` query parameter, get a hash and
@@ -94,14 +70,14 @@ impl IpfsHandler {
 	/// Get block header by hash as raw binary.
 	fn block(&self, hash: H256) -> Result<Out> {
 		let block_id = BlockId::Hash(hash);
-		let block = self.client.block_header(block_id).ok_or(Error::BlockNotFound)?;
+		let block = self.client().block_header(block_id).ok_or(Error::BlockNotFound)?;
 
 		Ok(Out::OctetStream(block.into_inner()))
 	}
 
 	/// Get list of block ommers by hash as raw binary.
 	fn block_list(&self, hash: H256) -> Result<Out> {
-		let uncles = self.client.find_uncles(&hash).ok_or(Error::BlockNotFound)?;
+		let uncles = self.client().find_uncles(&hash).ok_or(Error::BlockNotFound)?;
 
 		Ok(Out::OctetStream(rlp::encode(&uncles).to_vec()))
 	}
@@ -109,21 +85,21 @@ impl IpfsHandler {
 	/// Get transaction by hash and return as raw binary.
 	fn transaction(&self, hash: H256) -> Result<Out> {
 		let tx_id = TransactionId::Hash(hash);
-		let tx = self.client.transaction(tx_id).ok_or(Error::TransactionNotFound)?;
+		let tx = self.client().transaction(tx_id).ok_or(Error::TransactionNotFound)?;
 
 		Ok(Out::OctetStream(rlp::encode(&*tx).to_vec()))
 	}
 
 	/// Get state trie node by hash and return as raw binary.
 	fn state_trie(&self, hash: H256) -> Result<Out> {
-		let data = self.client.state_data(&hash).ok_or(Error::StateRootNotFound)?;
+		let data = self.client().state_data(&hash).ok_or(Error::StateRootNotFound)?;
 
 		Ok(Out::OctetStream(data))
 	}
 
 	/// Get state trie node by hash and return as raw binary.
 	fn contract_code(&self, hash: H256) -> Result<Out> {
-		let data = self.client.state_data(&hash).ok_or(Error::ContractNotFound)?;
+		let data = self.client().state_data(&hash).ok_or(Error::ContractNotFound)?;
 
 		Ok(Out::OctetStream(data))
 	}
@@ -138,11 +114,12 @@ fn get_param<'a>(query: &'a str, name: &str) -> Option<&'a str> {
 
 #[cfg(test)]
 mod tests {
+	use std::sync::Arc;
 	use super::*;
 	use ethcore::client::TestBlockChainClient;
 
 	fn get_mocked_handler() -> IpfsHandler {
-		IpfsHandler::new(Arc::new(TestBlockChainClient::new()))
+		IpfsHandler::new(None, None, Arc::new(TestBlockChainClient::new()))
 	}
 
 	#[test]
@@ -232,37 +209,37 @@ mod tests {
 
 	#[test]
 	fn route_block() {
-		let mut handler = get_mocked_handler();
+		let handler = get_mocked_handler();
 
-		let _ = handler.route("/api/v0/block/get", Some("arg=z43AaGF5tmkT9SEX6urrhwpEW5ZSaACY73Vw357ZXTsur2fR8BM"));
+		let out = handler.route("/api/v0/block/get", Some("arg=z43AaGF5tmkT9SEX6urrhwpEW5ZSaACY73Vw357ZXTsur2fR8BM"));
 
-		assert_eq!(handler.out, Out::NotFound("Block not found"));
+		assert_eq!(out, Out::NotFound("Block not found"));
 	}
 
 	#[test]
 	fn route_block_missing_query() {
-		let mut handler = get_mocked_handler();
+		let handler = get_mocked_handler();
 
-		let _ = handler.route("/api/v0/block/get", None);
+		let out = handler.route("/api/v0/block/get", None);
 
-		assert_eq!(handler.out, Out::Bad("CID parsing failed"));
+		assert_eq!(out, Out::Bad("CID parsing failed"));
 	}
 
 	#[test]
 	fn route_block_invalid_query() {
-		let mut handler = get_mocked_handler();
+		let handler = get_mocked_handler();
 
-		let _ = handler.route("/api/v0/block/get", Some("arg=foobarz43AaGF5tmkT9SEX6urrhwpEW5ZSaACY73Vw357ZXTsur2fR8BM"));
+		let out = handler.route("/api/v0/block/get", Some("arg=foobarz43AaGF5tmkT9SEX6urrhwpEW5ZSaACY73Vw357ZXTsur2fR8BM"));
 
-		assert_eq!(handler.out, Out::Bad("CID parsing failed"));
+		assert_eq!(out, Out::Bad("CID parsing failed"));
 	}
 
 	#[test]
 	fn route_invalid_route() {
-		let mut handler = get_mocked_handler();
+		let handler = get_mocked_handler();
 
-		let _ = handler.route("/foo/bar/baz", Some("arg=z43AaGF5tmkT9SEX6urrhwpEW5ZSaACY73Vw357ZXTsur2fR8BM"));
+		let out = handler.route("/foo/bar/baz", Some("arg=z43AaGF5tmkT9SEX6urrhwpEW5ZSaACY73Vw357ZXTsur2fR8BM"));
 
-		assert_eq!(handler.out, Out::NotFound("Route not found"));
+		assert_eq!(out, Out::NotFound("Route not found"));
 	}
 }

parity/cli/config.full.toml

@@ -76,6 +76,9 @@ path = "$HOME/.parity/secretstore"
 [ipfs]
 enable = false
 port = 5001
+interface = "local"
+cors = "null"
+hosts = ["none"]
 
 [mining]
 author = "0xdeadbeefcafe0000000000000000000000000001"

parity/cli/mod.rs

@@ -96,7 +96,7 @@ usage! {
 
 		// -- Account Options
 		flag_unlock: Option<String> = None,
-			or |c: &Config| otry!(c.account).unlock.clone().map(|vec| Some(vec.join(","))),
+			or |c: &Config| otry!(c.account).unlock.as_ref().map(|vec| Some(vec.join(","))),
 		flag_password: Vec<String> = Vec::new(),
 			or |c: &Config| otry!(c.account).password.clone(),
 		flag_keys_iterations: u32 = 10240u32,
@@ -138,7 +138,7 @@ usage! {
 		flag_network_id: Option<u64> = None,
 			or |c: &Config| otry!(c.network).id.clone().map(Some),
 		flag_bootnodes: Option<String> = None,
-			or |c: &Config| otry!(c.network).bootnodes.clone().map(|vec| Some(vec.join(","))),
+			or |c: &Config| otry!(c.network).bootnodes.as_ref().map(|vec| Some(vec.join(","))),
 		flag_no_discovery: bool = false,
 			or |c: &Config| otry!(c.network).discovery.map(|d| !d).clone(),
 		flag_node_key: Option<String> = None,
@@ -160,9 +160,9 @@ usage! {
 		flag_jsonrpc_cors: Option<String> = None,
 			or |c: &Config| otry!(c.rpc).cors.clone().map(Some),
 		flag_jsonrpc_apis: String = "web3,eth,net,parity,traces,rpc",
-			or |c: &Config| otry!(c.rpc).apis.clone().map(|vec| vec.join(",")),
+			or |c: &Config| otry!(c.rpc).apis.as_ref().map(|vec| vec.join(",")),
 		flag_jsonrpc_hosts: String = "none",
-			or |c: &Config| otry!(c.rpc).hosts.clone().map(|vec| vec.join(",")),
+			or |c: &Config| otry!(c.rpc).hosts.as_ref().map(|vec| vec.join(",")),
 
 		// IPC
 		flag_no_ipc: bool = false,
@@ -170,7 +170,7 @@ usage! {
 		flag_ipc_path: String = "$BASE/jsonrpc.ipc",
 			or |c: &Config| otry!(c.ipc).path.clone(),
 		flag_ipc_apis: String = "web3,eth,net,parity,parity_accounts,traces,rpc",
-			or |c: &Config| otry!(c.ipc).apis.clone().map(|vec| vec.join(",")),
+			or |c: &Config| otry!(c.ipc).apis.as_ref().map(|vec| vec.join(",")),
 
 		// DAPPS
 		flag_no_dapps: bool = false,
@@ -180,7 +180,7 @@ usage! {
 		flag_dapps_interface: String = "local",
 			or |c: &Config| otry!(c.dapps).interface.clone(),
 		flag_dapps_hosts: String = "none",
-			or |c: &Config| otry!(c.dapps).hosts.clone().map(|vec| vec.join(",")),
+			or |c: &Config| otry!(c.dapps).hosts.as_ref().map(|vec| vec.join(",")),
 		flag_dapps_path: String = "$BASE/dapps",
 			or |c: &Config| otry!(c.dapps).path.clone(),
 		flag_dapps_user: Option<String> = None,
@@ -204,6 +204,12 @@ usage! {
 			or |c: &Config| otry!(c.ipfs).enable.clone(),
 		flag_ipfs_api_port: u16 = 5001u16,
 			or |c: &Config| otry!(c.ipfs).port.clone(),
+		flag_ipfs_api_interface: String = "local",
+			or |c: &Config| otry!(c.ipfs).interface.clone(),
+		flag_ipfs_api_cors: Option<String> = None,
+			or |c: &Config| otry!(c.ipfs).cors.clone().map(Some),
+		flag_ipfs_api_hosts: String = "none",
+			or |c: &Config| otry!(c.ipfs).hosts.as_ref().map(|vec| vec.join(",")),
 
 		// -- Sealing/Mining Options
 		flag_author: Option<String> = None,
@@ -249,7 +255,7 @@ usage! {
 		flag_remove_solved: bool = false,
 			or |c: &Config| otry!(c.mining).remove_solved.clone(),
 		flag_notify_work: Option<String> = None,
-			or |c: &Config| otry!(c.mining).notify_work.clone().map(|vec| Some(vec.join(","))),
+			or |c: &Config| otry!(c.mining).notify_work.as_ref().map(|vec| Some(vec.join(","))),
 		flag_refuse_service_transactions: bool = false,
 			or |c: &Config| otry!(c.mining).refuse_service_transactions.clone(),
 
@@ -439,6 +445,9 @@ struct SecretStore {
 struct Ipfs {
 	enable: Option<bool>,
 	port: Option<u16>,
+	interface: Option<String>,
+	cors: Option<String>,
+	hosts: Option<Vec<String>>,
 }
 
 #[derive(Default, Debug, PartialEq, RustcDecodable)]
@@ -678,6 +687,9 @@ mod tests {
 			// IPFS
 			flag_ipfs_api: false,
 			flag_ipfs_api_port: 5001u16,
+			flag_ipfs_api_interface: "local".into(),
+			flag_ipfs_api_cors: Some("null".into()),
+			flag_ipfs_api_hosts: "none".into(),
 
 			// -- Sealing/Mining Options
 			flag_author: Some("0xdeadbeefcafe0000000000000000000000000001".into()),
@@ -872,7 +884,10 @@ mod tests {
 			}),
 			ipfs: Some(Ipfs {
 				enable: Some(false),
-				port: Some(5001)
+				port: Some(5001),
+				interface: None,
+				cors: None,
+				hosts: None,
 			}),
 			mining: Some(Mining {
 				author: Some("0xdeadbeefcafe0000000000000000000000000001".into()),

parity/cli/usage.txt

@@ -178,6 +178,17 @@ API and Console Options:
   --ipfs-api                     Enable IPFS-compatible HTTP API. (default: {flag_ipfs_api})
   --ipfs-api-port PORT           Configure on which port the IPFS HTTP API should listen.
                                  (default: {flag_ipfs_api_port})
+  --ipfs-api-interface IP        Specify the hostname portion of the IPFS API server,
+                                 IP should be an interface's IP address or local.
+                                 (default: {flag_ipfs_api_interface})
+  --ipfs-api-cors URL            Specify CORS header for IPFS API responses.
+                                 (default: {flag_ipfs_api_cors:?})
+  --ipfs-api-hosts HOSTS         List of allowed Host header values. This option will
+                                 validate the Host header sent by the browser, it
+                                 is additional security against some attack
+                                 vectors. Special options: "all", "none"
+                                 (default: {flag_ipfs_api_hosts}).
+
 
 Secret Store Options:
   --no-secretstore               Disable Secret Store functionality. (default: {flag_no_secretstore})

parity/configuration.rs

@@ -558,6 +558,9 @@ impl Configuration {
 		IpfsConfiguration {
 			enabled: self.args.flag_ipfs_api,
 			port: self.args.flag_ipfs_api_port,
+			interface: self.ipfs_interface(),
+			cors: self.ipfs_cors(),
+			hosts: self.ipfs_hosts(),
 		}
 	}
 
@@ -693,29 +696,39 @@ impl Configuration {
 		apis
 	}
 
+	fn cors(cors: Option<&String>) -> Option<Vec<String>> {
+		cors.map(|ref c| c.split(',').map(Into::into).collect())
+	}
+
 	fn rpc_cors(&self) -> Option<Vec<String>> {
-		let cors = self.args.flag_jsonrpc_cors.clone().or(self.args.flag_rpccorsdomain.clone());
+		let cors = self.args.flag_jsonrpc_cors.as_ref().or(self.args.flag_rpccorsdomain.as_ref());
-		cors.map(|c| c.split(',').map(|s| s.to_owned()).collect())
+		Self::cors(cors)
+	}
+
+	fn ipfs_cors(&self) -> Option<Vec<String>> {
+		Self::cors(self.args.flag_ipfs_api_cors.as_ref())
+	}
+
+	fn hosts(hosts: &str) -> Option<Vec<String>> {
+		match hosts {
+			"none" => return Some(Vec::new()),
+			"all" => return None,
+			_ => {}
+		}
+		let hosts = hosts.split(',').map(Into::into).collect();
+		Some(hosts)
 	}
 
 	fn rpc_hosts(&self) -> Option<Vec<String>> {
-		match self.args.flag_jsonrpc_hosts.as_ref() {
+		Self::hosts(&self.args.flag_jsonrpc_hosts)
-			"none" => return Some(Vec::new()),
-			"all" => return None,
-			_ => {}
-		}
-		let hosts = self.args.flag_jsonrpc_hosts.split(',').map(|h| h.into()).collect();
-		Some(hosts)
 	}
 
 	fn dapps_hosts(&self) -> Option<Vec<String>> {
-		match self.args.flag_dapps_hosts.as_ref() {
+		Self::hosts(&self.args.flag_dapps_hosts)
-			"none" => return Some(Vec::new()),
+	}
-			"all" => return None,
+
-			_ => {}
+	fn ipfs_hosts(&self) -> Option<Vec<String>> {
-		}
+		Self::hosts(&self.args.flag_ipfs_api_hosts)
-		let hosts = self.args.flag_dapps_hosts.split(',').map(|h| h.into()).collect();
-		Some(hosts)
 	}
 
 	fn ipc_config(&self) -> Result<IpcConfiguration, String> {
@@ -850,14 +863,18 @@ impl Configuration {
 		}.into()
 	}
 
-	fn rpc_interface(&self) -> String {
+	fn interface(interface: &str) -> String {
-		match self.network_settings().rpc_interface.as_str() {
+		match interface {
 			"all" => "0.0.0.0",
 			"local" => "127.0.0.1",
 			x => x,
 		}.into()
 	}
 
+	fn rpc_interface(&self) -> String {
+		Self::interface(&self.network_settings().rpc_interface)
+	}
+
 	fn dapps_interface(&self) -> String {
 		match self.args.flag_dapps_interface.as_str() {
 			"local" => "127.0.0.1",
@@ -865,6 +882,10 @@ impl Configuration {
 		}.into()
 	}
 
+	fn ipfs_interface(&self) -> String {
+		Self::interface(&self.args.flag_ipfs_api_interface)
+	}
+
 	fn secretstore_interface(&self) -> String {
 		match self.args.flag_secretstore_interface.as_str() {
 			"local" => "127.0.0.1",
@@ -873,11 +894,7 @@ impl Configuration {
 	}
 
 	fn stratum_interface(&self) -> String {
-		match self.args.flag_stratum_interface.as_str() {
+		Self::interface(&self.args.flag_stratum_interface)
-			"local" => "127.0.0.1",
-			"all" => "0.0.0.0",
-			x => x,
-		}.into()
 	}
 
 	fn dapps_enabled(&self) -> bool {
@@ -1273,6 +1290,38 @@ mod tests {
 		assert_eq!(conf3.dapps_hosts(), Some(vec!["ethcore.io".into(), "something.io".into()]));
 	}
 
+	#[test]
+	fn should_parse_ipfs_hosts() {
+		// given
+
+		// when
+		let conf0 = parse(&["parity"]);
+		let conf1 = parse(&["parity", "--ipfs-api-hosts", "none"]);
+		let conf2 = parse(&["parity", "--ipfs-api-hosts", "all"]);
+		let conf3 = parse(&["parity", "--ipfs-api-hosts", "ethcore.io,something.io"]);
+
+		// then
+		assert_eq!(conf0.ipfs_hosts(), Some(Vec::new()));
+		assert_eq!(conf1.ipfs_hosts(), Some(Vec::new()));
+		assert_eq!(conf2.ipfs_hosts(), None);
+		assert_eq!(conf3.ipfs_hosts(), Some(vec!["ethcore.io".into(), "something.io".into()]));
+	}
+
+	#[test]
+	fn should_parse_ipfs_cors() {
+		// given
+
+		// when
+		let conf0 = parse(&["parity"]);
+		let conf1 = parse(&["parity", "--ipfs-api-cors", "*"]);
+		let conf2 = parse(&["parity", "--ipfs-api-cors", "http://ethcore.io,http://something.io"]);
+
+		// then
+		assert_eq!(conf0.ipfs_cors(), None);
+		assert_eq!(conf1.ipfs_cors(), Some(vec!["*".into()]));
+		assert_eq!(conf2.ipfs_cors(), Some(vec!["http://ethcore.io".into(),"http://something.io".into()]));
+	}
+
 	#[test]
 	fn should_disable_signer_in_geth_compat() {
 		// given

parity/ipfs.rs

@@ -1,9 +1,16 @@
-pub use parity_ipfs_api::start_server;
+use std::sync::Arc;
+use parity_ipfs_api;
+use parity_ipfs_api::error::ServerError;
+use ethcore::client::BlockChainClient;
+use hyper::server::Listening;
 
 #[derive(Debug, PartialEq, Clone)]
 pub struct Configuration {
     pub enabled: bool,
     pub port: u16,
+    pub interface: String,
+    pub cors: Option<Vec<String>>,
+    pub hosts: Option<Vec<String>>,
 }
 
 impl Default for Configuration {
@@ -11,6 +18,23 @@ impl Default for Configuration {
         Configuration {
             enabled: false,
             port: 5001,
+            interface: "127.0.0.1".into(),
+            cors: None,
+            hosts: Some(Vec::new()),
         }
     }
 }
+
+pub fn start_server(conf: Configuration, client: Arc<BlockChainClient>) -> Result<Option<Listening>, ServerError> {
+    if !conf.enabled {
+        return Ok(None);
+    }
+
+    parity_ipfs_api::start_server(
+        conf.port,
+        conf.interface,
+        conf.cors,
+        conf.hosts,
+        client
+    ).map(Some)
+}

parity/run.rs

@@ -471,10 +471,7 @@ pub fn execute(cmd: RunCmd, can_restart: bool, logger: Arc<RotatingLogger>) -> R
 	let secretstore_key_server = secretstore::start(cmd.secretstore_conf.clone(), secretstore_deps);
 
 	// the ipfs server
-	let ipfs_server = match cmd.ipfs_conf.enabled {
+	let ipfs_server = ipfs::start_server(cmd.ipfs_conf.clone(), client.clone())?;
-		true => Some(ipfs::start_server(cmd.ipfs_conf.port, client.clone())?),
-		false => None,
-	};
 
 	// the informant
 	let informant = Arc::new(Informant::new(