Add refresh uri setting (p2#330)

CONTRIBUTORS.md

@@ -3,6 +3,7 @@ Contributors
 
 Contributors to the codebase, in reverse chronological order:
 
+- Foti Dim, @fotidim
 - Larry Brunet, @larrybrunet
 - Dave Carlson, @drdavec
 - Sam Oakley, @blork

README.md

@@ -66,6 +66,8 @@ oauth2.authConfig.authorizeEmbedded = true
 oauth2.authConfig.authorizeContext = <# your UIViewController / NSWindow #>
 ```
 
+Need to specify a separate refresh token URI? You can set the `refresh_uri` in the Settings Dictionary. If specified the library will refresh access tokens using the `refresh_uri` you specified, otherwise it will use the `token_uri`.
+
 Need to debug? Use a `.debug` or even a `.trace` logger:
 
 ```swift
@@ -543,4 +545,3 @@ Since there is no `NOTICE` file there is nothing that you have to include in you
 
 
 [sample]: https://github.com/p2/OAuth2App
-

Sources/Base/OAuth2Base.swift

@@ -155,6 +155,7 @@ open class OAuth2Base: OAuth2Securable {
 	- client_secret (String), usually only needed for code grant
 	- authorize_uri (URL-String)
 	- token_uri (URL-String), if omitted the authorize_uri will be used to obtain tokens
+	- refresh_uri (URL-String), if omitted the token_uri will be used to obtain tokens
 	- redirect_uris (Array of URL-Strings)
 	- scope (String)
 

Sources/Base/OAuth2ClientConfig.swift

@@ -28,6 +28,9 @@ open class OAuth2ClientConfig {
 
 	/// The URL where we can exchange a code for a token.
 	public final var tokenURL: URL?
+
+	/// The URL where we can refresh an access token using a refresh token.
+	public final var refreshURL: URL?
 
 	/// Where a logo/icon for the app can be found.
 	public final var logoURL: URL?
@@ -112,6 +115,9 @@ open class OAuth2ClientConfig {
 		if let token = settings["token_uri"] as? String {
 			tokenURL = URL(string: token)
 		}
+		if let refresh = settings["refresh_uri"] as? String {
+			refreshURL = URL(string: refresh)
+		}
 		if let registration = settings["registration_uri"] as? String {
 			registrationURL = URL(string: registration)
 		}

Sources/Flows/OAuth2.swift

@@ -57,6 +57,7 @@ open class OAuth2: OAuth2Base {
 	- client_secret (String), usually only needed for code grant
 	- authorize_uri (URL-String)
 	- token_uri (URL-String), if omitted the authorize_uri will be used to obtain tokens
+	- refresh_uri (URL-String), if omitted the token_uri will be used to obtain tokens
 	- redirect_uris (Array of URL-Strings)
 	- scope (String)
 
@@ -343,7 +344,7 @@ open class OAuth2: OAuth2Base {
 			throw OAuth2Error.noRefreshToken
 		}
 
-		let req = OAuth2AuthRequest(url: (clientConfig.tokenURL ?? clientConfig.authorizeURL))
+		let req = OAuth2AuthRequest(url: (clientConfig.refreshURL ?? clientConfig.tokenURL ?? clientConfig.authorizeURL))
 		req.params["grant_type"] = "refresh_token"
 		req.params["refresh_token"] = refreshToken
 		if let clientId = clientId {

Tests/BaseTests/OAuth2Tests.swift

@@ -43,6 +43,18 @@ class OAuth2Tests: XCTestCase {
 			"keychain": false,
 		])
 	}
+
+	func refreshOAuth2() -> OAuth2 {
+		return OAuth2(settings: [
+			"client_id": "abc",
+			"authorize_uri": "https://auth.ful.io",
+			"token_uri": "https://token.ful.io",
+			"refresh_uri": "https://refresh.ful.io",
+			"scope": "login",
+			"verbose": true,
+			"keychain": false,
+		])
+	}
 
 	func testInit() {
 		var oauth = OAuth2(settings: ["client_id": "def"])
@@ -88,6 +100,22 @@ class OAuth2Tests: XCTestCase {
 		//XCTAssertEqual(params["redirect_uri"]!, "oauth2app://callback", "Expecting correct `redirect_uri` in query")
 		XCTAssertNil(params["state"], "Expecting no `state` in query")
 	}
+
+	func testTokenRefreshRequest() {
+		let oa = refreshOAuth2()
+		oa.verbose = false
+		oa.clientConfig.refreshToken = "abc"
+		let req = try! oa.tokenRequestForTokenRefresh().asURLRequest(for: oa)
+		let auth = req.url!
+
+		let comp = URLComponents(url: auth, resolvingAgainstBaseURL: true)!
+		XCTAssertEqual("https", comp.scheme!, "Need correct scheme")
+		XCTAssertEqual("refresh.ful.io", comp.host!, "Need correct host")
+
+		let params = OAuth2.params(fromQuery: comp.percentEncodedQuery ?? "")
+		//XCTAssertEqual(params["redirect_uri"]!, "oauth2app://callback", "Expecting correct `redirect_uri` in query")
+		XCTAssertNil(params["state"], "Expecting no `state` in query")
+	}
 
 	func testAuthorizeCall() {
 		let oa = genericOAuth2()

Tests/FlowTests/OAuth2RefreshTokenTests.swift

@@ -41,6 +41,16 @@ class OAuth2RefreshTokenTests: XCTestCase {
 			"keychain": false,
 		])
 	}
+
+	func refreshOAuth2() -> OAuth2 {
+		return OAuth2(settings: [
+			"client_id": "abc",
+			"authorize_uri": "https://auth.ful.io",
+			"token_uri": "https://token.ful.io",
+			"refresh_uri": "https://refresh.ful.io",
+			"keychain": false,
+		])
+	}
 
 	func testCannotRefresh() {
 		let oauth = genericOAuth2()
@@ -76,6 +86,28 @@ class OAuth2RefreshTokenTests: XCTestCase {
 		XCTAssertNil(dict["client_secret"])
 		XCTAssertNil(req!.allHTTPHeaderFields?["Authorization"])
 	}
+
+	func testRefreshRequestWithDedicatedRefreshURI() {
+		let oauth = refreshOAuth2()
+		oauth.clientConfig.refreshToken = "pov"
+
+		let req = try? oauth.tokenRequestForTokenRefresh().asURLRequest(for: oauth)
+		XCTAssertNotNil(req)
+		XCTAssertNotNil(req?.url)
+		XCTAssertNotNil(req?.httpBody)
+		XCTAssertEqual("https://refresh.ful.io", req!.url!.absoluteString)
+		let comp = URLComponents(url: req!.url!, resolvingAgainstBaseURL: true)
+		let params = comp?.percentEncodedQuery
+		XCTAssertNil(params)
+		let body = String(data: req!.httpBody!, encoding: String.Encoding.utf8)
+		XCTAssertNotNil(body)
+		let dict = OAuth2.params(fromQuery: body!)
+		XCTAssertEqual(dict["client_id"], "abc")
+		XCTAssertEqual(dict["refresh_token"], "pov")
+		XCTAssertEqual(dict["grant_type"], "refresh_token")
+		XCTAssertNil(dict["client_secret"])
+		XCTAssertNil(req!.allHTTPHeaderFields?["Authorization"])
+	}
 
 	func testRefreshRequestWithSecret() {
 		let oauth = genericOAuth2()