Method makeRequest

src/AppStoreServerAPI.ts:194–238

* Performs a network request against the API and handles the result.

(method: HTTPMethod, path: string, body?: any)

   * Performs a network request against the API and handles the result.
   */
  private async makeRequest(method: HTTPMethod, path: string, body?: any): Promise<any> {
    const token = await this.getToken()
    const url = this.baseUrl + path
    const serializedBody = body ? JSON.stringify(body) : undefined

    const result = await fetch(url, {
      method: method,
      body: serializedBody,
      headers: {
        Authorization: `Bearer ${token}`,
        "Content-Type": "application/json"
      }
    })

    switch (result.status) {
      case 200: {
        // Action endpoints such as Finish-Transaction and Set-App-Account-Token return 200 with an
        // empty body, so we can't blindly call result.json() (it would throw on empty input).
        const text = await result.text()
        return text.length > 0 ? JSON.parse(text) : undefined
      }
      case 202:
        return

      case 400:
      case 403:
      case 404:
      case 429:
      case 500: {
        let retryAfter: number | undefined
        const retryAfterHeader = result.headers.get("retry-after")
        if (result.status === 429 && retryAfterHeader !== null) {
          retryAfter = parseInt(retryAfterHeader)
        }
        throw await this.errorForResponse(result, retryAfter)
      }

      case 401:
        this.token = undefined
        throw new Error("The request is unauthorized; the JSON Web Token (JWT) is invalid.")

      default:
        throw new Error("An unknown error occurred")
    }
  }

  /**
   * Builds an error from a non-success API response.