If an api token is not passed in the constructor, check the env variable (#548)

* If an api token is not passed in the constructor, check the env variable

Signed-off-by: Elena Kolevska <[email protected]>

* Adds tests

Signed-off-by: Elena Kolevska <[email protected]>

* Updates docs

Signed-off-by: Elena Kolevska <[email protected]>

* Apply suggestions from code review

Co-authored-by: Shubham Sharma <[email protected]>
Signed-off-by: Elena Kolevska <[email protected]>

* Fixes linter

Signed-off-by: Elena Kolevska <[email protected]>

* Moves default api token to Settings

Signed-off-by: Elena Kolevska <[email protected]>

---------

Signed-off-by: Elena Kolevska <[email protected]>
Signed-off-by: Elena Kolevska <[email protected]>
Co-authored-by: Shubham Sharma <[email protected]>

Author: elena-kolevska

daprdocs/content/en/js-sdk-docs/js-client/_index.md

@@ -79,7 +79,12 @@ npm run start:dapr-grpc
 
 ### Environment Variables
 
-You can use the `DAPR_HTTP_ENDPOINT` and `DAPR_GRPC_ENDPOINT` environment variables to set the Dapr Sidecar's HTTP and gRPC endpoints respectively. When these variables are set, the `daprHost` and `daprPort` don't have to be passed to the constructor, the client will parse them automatically out of the provided endpoints.
+##### Dapr Sidecar Endpoints
+
+You can use the `DAPR_HTTP_ENDPOINT` and `DAPR_GRPC_ENDPOINT` environment variables to set the Dapr
+Sidecar's HTTP and gRPC endpoints respectively. When these variables are set, the `daprHost`
+and `daprPort` don't have to be set in the options argument of the constructor, the client will parse them automatically
+out of the provided endpoints.
 
 ```typescript
 import { DaprClient, CommunicationProtocol } from "@dapr/dapr";
@@ -91,7 +96,14 @@ const client = new DaprClient();
 const client = new DaprClient({ communicationProtocol: CommunicationProtocol.GRPC });
 ```
 
-If the environment variables are set, but `daprHost` and `daprPort` values are passed to the constructor, the latter will take precedence over the environment variables.
+If the environment variables are set, but `daprHost` and `daprPort` values are passed to the
+constructor, the latter will take precedence over the environment variables.
+
+##### Dapr API Token
+
+You can use the `DAPR_API_TOKEN` environment variable to set the Dapr API token. When this variable
+is set, the `daprApiToken` doesn't have to be set in the options argument of the constructor,
+the client will get it automatically.
 
 ## General
 

src/utils/Client.util.ts

@@ -292,7 +292,7 @@ export function getClientOptions(
     isKeepAlive: clientOptions?.isKeepAlive,
     logger: clientOptions?.logger ?? defaultLoggerOptions,
     actor: clientOptions?.actor,
-    daprApiToken: clientOptions?.daprApiToken,
+    daprApiToken: clientOptions?.daprApiToken ?? Settings.getDefaultApiToken(),
     maxBodySizeMb: clientOptions?.maxBodySizeMb,
   };
 }

src/utils/Settings.util.ts

@@ -15,6 +15,7 @@ import CommunicationProtocolEnum from "../enum/CommunicationProtocol.enum";
 
 export class Settings {
   private static readonly defaultAppId: string = "my-dapr-app";
+  private static readonly defaultApiToken = undefined;
   private static readonly defaultHost: string = "127.0.0.1";
   private static readonly defaultHttpAppPort: string = "3000";
   private static readonly defaultHttpPort: string = "3500";
@@ -51,6 +52,10 @@ export class Settings {
     return process.env.APP_ID ?? Settings.defaultAppId;
   }
 
+  static getDefaultApiToken() {
+    return process.env.DAPR_API_TOKEN || Settings.defaultApiToken;
+  }
+
   static getDefaultHost(): string {
     return Settings.defaultHost;
   }

test/unit/utils/Client.util.test.ts

@@ -359,6 +359,35 @@ describe("Client.util", () => {
       expect(options).toEqual(expectedOptions);
     });
 
+    it("returns correct Dapr Client Options when token provided in constructor", () => {
+      const inOptions: Partial<DaprClientOptions> = {
+        daprApiToken: "token",
+      };
+      const options = getClientOptions(inOptions, CommunicationProtocolEnum.HTTP, undefined);
+      expect(options.daprApiToken).toEqual("token");
+    });
+
+    it("returns correct Dapr Client Options when token provided in env variable", () => {
+      const oldToken = process.env.DAPR_API_TOKEN;
+      process.env.DAPR_API_TOKEN = "envtoken";
+      const options = getClientOptions(undefined, CommunicationProtocolEnum.HTTP, undefined);
+      expect(options.daprApiToken).toEqual("envtoken");
+      process.env.DAPR_API_TOKEN = oldToken;
+    });
+
+    it("returns correct Dapr Client Options when token provided both in constructor and in env variable", () => {
+      process.env.DAPR_API_TOKEN = "envtoken";
+
+      const inOptions: Partial<DaprClientOptions> = {
+        daprApiToken: "token",
+      };
+      const options = getClientOptions(inOptions, CommunicationProtocolEnum.HTTP, undefined);
+
+      expect(options.daprApiToken).toEqual("token");
+
+      delete process.env.DAPR_API_TOKEN;
+    });
+
     it("returns correct Dapr Client Options when undefined options provided", () => {
       const options = getClientOptions(undefined, CommunicationProtocolEnum.GRPC, undefined);
       const expectedOptions: Partial<DaprClientOptions> = {