Add ACTIONS_ORCHESTRATION_ID support to http-client user-agent

Co-authored-by: TingluoHuang <1750815+TingluoHuang@users.noreply.github.com>

__tests__/basics.test.ts

@@ -374,4 +374,35 @@ describe('basics', () => {
       httpm.MediaTypes.ApplicationJson
     )
   })
+
+  it('appends orchestration ID to user-agent when ACTIONS_ORCHESTRATION_ID is set', async () => {
+    const orchId = 'test-orch-id-12345'
+    process.env['ACTIONS_ORCHESTRATION_ID'] = orchId
+    
+    const http: httpm.HttpClient = new httpm.HttpClient('http-client-tests')
+    const res: httpm.HttpClientResponse = await http.get(
+      'https://postman-echo.com/get'
+    )
+    expect(res.message.statusCode).toBe(200)
+    const body: string = await res.readBody()
+    const obj = JSON.parse(body)
+    expect(obj.headers['user-agent']).toBe(
+      `http-client-tests (gh_orch_id:${orchId})`
+    )
+    
+    delete process.env['ACTIONS_ORCHESTRATION_ID']
+  })
+
+  it('does not modify user-agent when ACTIONS_ORCHESTRATION_ID is not set', async () => {
+    delete process.env['ACTIONS_ORCHESTRATION_ID']
+    
+    const http: httpm.HttpClient = new httpm.HttpClient('http-client-tests')
+    const res: httpm.HttpClientResponse = await http.get(
+      'https://postman-echo.com/get'
+    )
+    expect(res.message.statusCode).toBe(200)
+    const body: string = await res.readBody()
+    const obj = JSON.parse(body)
+    expect(obj.headers['user-agent']).toBe('http-client-tests')
+  })
 })

src/index.ts

@@ -599,7 +599,7 @@ export class HttpClient {
     info.options.method = method
     info.options.headers = this._mergeHeaders(headers)
     if (this.userAgent != null) {
-      info.options.headers['user-agent'] = this.userAgent
+      info.options.headers['user-agent'] = this._getUserAgentWithOrchestrationId(this.userAgent)
     }
 
     info.options.agent = this._getAgent(info.parsedUrl)
@@ -816,6 +816,14 @@ export class HttpClient {
     return proxyAgent
   }
 
+  private _getUserAgentWithOrchestrationId(userAgent: string): string {
+    const orchId = process.env['ACTIONS_ORCHESTRATION_ID']
+    if (orchId) {
+      return `${userAgent} (gh_orch_id:${orchId})`
+    }
+    return userAgent
+  }
+
   private async _performExponentialBackoff(retryNumber: number): Promise<void> {
     retryNumber = Math.min(ExponentialBackoffCeiling, retryNumber)
     const ms: number = ExponentialBackoffTimeSlice * Math.pow(2, retryNumber)