Possibility to inject extra request headers when performing requests (#…

…12)

* add extra request headers

* update readme

README.md

@@ -49,5 +49,9 @@ When initializing the client object, an optional config can also be specified wi
   // Useful in the situations where the server connects directly to a node to fetch block info
   // and would like a predictable shard for the validation of tokens
   blockHashShard: 0;
+
+  // Optional, to put custom HTTP headers in the request that is made to the api
+  // Useful in situations where a private api is used and is protected by a JTW token
+  extraRequestHeaders?: { [key: string]: string };
 }
 ```

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@multiversx/sdk-native-auth-client",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "description": "Native authentication client-side",
   "main": "lib/src/index.js",
   "types": "lib/src/index.d.ts",

src/entities/native.auth.client.config.ts

@@ -4,4 +4,5 @@ export class NativeAuthClientConfig {
   expirySeconds: number = 60 * 60 * 24;
   blockHashShard?: number;
   gatewayUrl?: string;
+  extraRequestHeaders?: { [key: string]: string };
 }

src/native.auth.client.ts

@@ -34,7 +34,7 @@ export class NativeAuthClient {
   private async getCurrentBlockHashWithGateway(): Promise<string> {
     const round = await this.getCurrentRound();
     const url = `${this.config.gatewayUrl}/blocks/by-round/${round}`;
-    const response = await axios.get(url);
+    const response = await this.get(url);
     const blocks = response.data.data.blocks;
     const block = blocks.filter((block: { shard: number }) => block.shard === this.config.blockHashShard)[0];
     return block.hash;
@@ -49,7 +49,7 @@ export class NativeAuthClient {
     }
 
     const url = `${this.config.gatewayUrl}/network/status/${this.config.blockHashShard}`;
-    const response = await axios.get(url);
+    const response = await this.get(url);
     const status = response.data.data.status;
     return status.erd_current_round;
   }
@@ -60,7 +60,7 @@ export class NativeAuthClient {
       url += `&shard=${this.config.blockHashShard}`;
     }
 
-    const response = await axios.get(url);
+    const response = await this.get(url);
     return response.data[0].hash;
   }
 
@@ -71,4 +71,8 @@ export class NativeAuthClient {
   private escape(str: string) {
     return str.replace(/\+/g, "-").replace(/\//g, "_").replace(/=/g, "");
   }
+
+  private async get(url: string): Promise<any> {
+    return await axios.get(url, { headers: this.config.extraRequestHeaders });
+  }
 }