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# HCHttpCallRequestGetHeaderAtIndex

> HCHttpCallRequestGetHeaderAtIndex

# HCHttpCallRequestGetHeaderAtIndex

获取该 HTTP 调用中位于指定从零开始索引处的请求标头。

## Syntax

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

### Parameters

*call*   \_In\_\
Type: HCCallHandle

HTTP 调用的句柄。

*headerIndex*   \_In\_\
Type: uint32\_t

请求标头的从零开始的具体索引。

*headerName*   \_Out\_\
Type: char\*\*

HTTP 调用的 UTF-8 编码请求标头名称。

*headerValue*   \_Out\_\
Type: char\*\*

HTTP 调用的 UTF-8 编码请求标头值。

### Return value

Type: HRESULT

此 API 操作的结果代码。可能的值为 S\_OK、E\_INVALIDARG 或 E\_FAIL。

## Remarks

使用 HCHttpCallRequestGetNumHeaders() 可获知该 HTTP 调用中的请求标头数量。

## Requirements

**Header:** httpProvider.h

**Library:** libHttpClient.GDK.lib

## See also

[httpProvider](https://docs.xbox.com/zh-CN/reference/live/httpclient/httpprovider/httpprovider_members.md)


## Related topics

- [httpProvider（内容）](https://docs.xbox.com/zh-CN/reference/live/httpclient/httpprovider/httpprovider_members.md)
- [XblHttpCallGetHeaderAtIndex](https://docs.xbox.com/zh-CN/reference/live/xsapi-c/http_call_c/functions/xblhttpcallgetheaderatindex.md)
- [HCHttpCallResponseGetHeaderAtIndex](https://docs.xbox.com/zh-CN/reference/live/httpclient/httpclient/functions/hchttpcallresponsegetheaderatindex.md)
- [HCHttpCallRequestGetHeader](https://docs.xbox.com/zh-CN/reference/live/httpclient/httpprovider/functions/hchttpcallrequestgetheader.md)
- [HCHttpCallRequestGetNumHeaders](https://docs.xbox.com/zh-CN/reference/live/httpclient/httpprovider/functions/hchttpcallrequestgetnumheaders.md)