Add url argument to authToTokenEndpoint.

Author: jaredhanson

src/client/auth.test.ts

@@ -480,9 +480,10 @@ describe("OAuth Authorization", () => {
     });
 
     it("exchanges code for tokens with auth", async () => {
-      mockProvider.authToTokenEndpoint = function(headers: Headers, params: URLSearchParams) {
+      mockProvider.authToTokenEndpoint = function(url: URL, headers: Headers, params: URLSearchParams) {
         headers.set("Authorization", "Basic " + btoa(validClientInfo.client_id + ":" + validClientInfo.client_secret));
-        params.set("example_param", "example_value")
+        params.set("example_url", url.toString());
+        params.set("example_param", "example_value");
       };
 
       mockFetch.mockResolvedValueOnce({
@@ -517,6 +518,7 @@ describe("OAuth Authorization", () => {
       expect(body.get("code_verifier")).toBe("verifier123");
       expect(body.get("client_id")).toBe("client123");
       expect(body.get("redirect_uri")).toBe("http://localhost:3000/callback");
+      expect(body.get("example_url")).toBe("https://auth.example.com/token");
       expect(body.get("example_param")).toBe("example_value");
       expect(body.get("client_secret")).toBeUndefined;
     });
@@ -624,9 +626,10 @@ describe("OAuth Authorization", () => {
     });
 
     it("exchanges refresh token for new tokens with auth", async () => {
-      mockProvider.authToTokenEndpoint = function(headers: Headers, params: URLSearchParams) {
+      mockProvider.authToTokenEndpoint = function(url: URL, headers: Headers, params: URLSearchParams) {
         headers.set("Authorization", "Basic " + btoa(validClientInfo.client_id + ":" + validClientInfo.client_secret));
-        params.set("example_param", "example_value")
+        params.set("example_url", url.toString());
+        params.set("example_param", "example_value");
       };
 
       mockFetch.mockResolvedValueOnce({
@@ -657,6 +660,7 @@ describe("OAuth Authorization", () => {
       expect(body.get("grant_type")).toBe("refresh_token");
       expect(body.get("refresh_token")).toBe("refresh123");
       expect(body.get("client_id")).toBe("client123");
+      expect(body.get("example_url")).toBe("https://auth.example.com/token");
       expect(body.get("example_param")).toBe("example_value");
       expect(body.get("client_secret")).toBeUndefined;
     });

src/client/auth.ts

@@ -67,7 +67,7 @@ export interface OAuthClientProvider {
    */
   codeVerifier(): string | Promise<string>;
 
-  authToTokenEndpoint?(headers: Headers, params: URLSearchParams): void | Promise<void>;
+  authToTokenEndpoint?(url: URL, headers: Headers, params: URLSearchParams): void | Promise<void>;
 }
 
 export type AuthResult = "AUTHORIZED" | "REDIRECT";
@@ -407,7 +407,7 @@ export async function exchangeAuthorization(
   });
 
   if (provider?.authToTokenEndpoint) {
-    provider.authToTokenEndpoint(headers, params);
+    provider.authToTokenEndpoint(tokenUrl, headers, params);
   } else if (clientInformation.client_secret) {
     params.set("client_secret", clientInformation.client_secret);
   }
@@ -470,7 +470,7 @@ export async function refreshAuthorization(
   });
 
   if (provider?.authToTokenEndpoint) {
-    provider.authToTokenEndpoint(headers, params);
+    provider.authToTokenEndpoint(tokenUrl, headers, params);
   } else if (clientInformation.client_secret) {
     params.set("client_secret", clientInformation.client_secret);
   }