调用 Web API 的 Web API：调用 APIA web API that calls web APIs: Call an API

以下代码继续演示调用 Web API 的 Web API：获取应用的令牌中显示的示例代码。The following code continues the example code that's shown in A web API that calls web APIs: Acquire a token for the app. 该代码在 API 控制器的操作中调用。The code is called in the actions of the API controllers. 它调用名为“todolist” 的下游 API。It calls a downstream API named todolist.

获取令牌后，将其用作持有者令牌以调用下游 API。After you've acquired the token, use it as a bearer token to call the downstream API.

private async Task CallTodoListService(string accessToken)
{

// After the token has been returned by Microsoft Identity Web, add it to the HTTP authorization header before making the call to access the To Do list service.
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", result.AccessToken);

// Call the To Do list service.
HttpResponseMessage response = await _httpClient.GetAsync(TodoListBaseAddress + "/api/todolist");
...
}

以下代码继续演示调用 Web API 的 Web API：获取应用的令牌中显示的示例代码。The following code continues the example code that's shown in A web API that calls web APIs: Acquire a token for the app. 该代码在 API 控制器的操作中调用。The code is called in the actions of the API controllers. 它调用下游 API MS Graph。It calls the downstream API MS Graph.

获取令牌后，将其用作持有者令牌以调用下游 API。After you've acquired the token, use it as a bearer token to call the downstream API.

private String callMicrosoftGraphMeEndpoint(String accessToken){
    RestTemplate restTemplate = new RestTemplate();

    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);

    headers.set("Authorization", "Bearer " + accessToken);

    HttpEntity<String> entity = new HttpEntity<>(null, headers);

    String result = restTemplate.exchange("https://microsoftgraph.chinacloudapi.cn/v1.0/me", HttpMethod.GET,
            entity, String.class).getBody();

    return result;
}

使用 MSAL Python 演示此流的示例尚不可用。A sample demonstrating this flow with MSAL Python is not yet available.