> ## Documentation Index
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> Use this file to discover all available pages before exploring further.

# XblHttpCallGetHeaderAtIndex

> XblHttpCallGetHeaderAtIndex

# XblHttpCallGetHeaderAtIndex

取得 HTTP 呼叫中位於特定以零為起始之索引的回應標頭。

## 語法

```cpp theme={null}
HRESULT XblHttpCallGetHeaderAtIndex(  
         XblHttpCallHandle call,  
         uint32_t headerIndex,  
         const char** headerName,  
         const char** headerValue  
)  
```

### 參數

*call*   \_In\_\
類型：[XblHttpCallHandle](/zh-TW/reference/live/xsapi-c/http_call_c/handles/xblhttpcallhandle)

HTTP 呼叫的控制代碼。

*headerIndex*   \_In\_\
類型：uint32\_t

回應標頭的特定以零為起始之索引。

*headerName*   \_Out\_\
類型：char\*\*

HTTP 呼叫的 UTF-8 編碼回應標頭名稱。傳回之字串指標的記憶體在 XblHttpCallHandle 物件的存留期間內保持有效，直到對其呼叫 XblHttpCallCloseHandle() 為止。

*headerValue*   \_Out\_\
類型：char\*\*

HTTP 呼叫的 UTF-8 編碼回應標頭值。傳回之字串指標的記憶體在 XblHttpCallHandle 物件的存留期間內保持有效，直到對其呼叫 XblHttpCallCloseHandle() 為止。

### 傳回值

類型：HRESULT

此 API 作業的結果碼。可能的值為 S\_OK、E\_INVALIDARG 或 E\_FAIL。

## 備註

只有在呼叫 [XblHttpCallPerformAsync](/zh-TW/reference/live/xsapi-c/http_call_c/functions/xblhttpcallperformasync) 且 HTTP 工作完成後，才能呼叫此函式。使用 [XblHttpCallGetNumHeaders](/zh-TW/reference/live/xsapi-c/http_call_c/functions/xblhttpcallgetnumheaders) 可得知 HTTP 呼叫中有多少個回應標頭。

## 需求

**標頭：** http\_call\_c.h

**程式庫：** Microsoft.Xbox.Services.14x.GDK.C.lib

## 另請參閱

[http\_call\_c](/zh-TW/reference/live/xsapi-c/http_call_c/http_call_c_members)


## Related topics

- [XblHttpCallGetHeaderAtIndex](/reference/live/xsapi-c/http_call_c/functions/xblhttpcallgetheaderatindex.md)
- [HTTP and WebSocket web requests in the GDK](/build/console-features/networking/web-requests/http-networking.md)
- [HCHttpCallResponseGetHeaderAtIndex](/reference/live/httpclient/httpclient/functions/hchttpcallresponsegetheaderatindex.md)
- [HCHttpCallRequestGetHeaderAtIndex](/reference/live/httpclient/httpprovider/functions/hchttpcallrequestgetheaderatindex.md)
- [XblHttpCallGetHeader](/reference/live/xsapi-c/http_call_c/functions/xblhttpcallgetheader.md)