HTTP gzip解压问题

[祸起蛋炒饭]

我在网上调用的这个方法

int CMainDlg::httpgzdecompress(BYTE *zdata, ULONG nzdata, BYTE *data, ULONG *ndata)
{
	int err = 0;
	z_stream d_stream = {};
	static char dummy_head[2] =
	{
		0x8 + 0x7 * 0x10,
		(((0x8 + 0x7 * 0x10) * 0x100 + 30) / 31 * 31) & 0xFF,
	};

	d_stream.zalloc = (alloc_func)0;
	d_stream.zfree = (free_func)0;
	d_stream.opaque = (voidpf)0;
	d_stream.next_in = zdata;
	d_stream.avail_in = 0;
	d_stream.next_out = data;
	if (inflateInit2(&d_stream, 47) != Z_OK) return -1;
	while (d_stream.total_out < *ndata && d_stream.total_in < nzdata) 
	{
		d_stream.avail_in = d_stream.avail_out = 1; /* force small buffers */
		if ((err = inflate(&d_stream, Z_NO_FLUSH)) == Z_STREAM_END)
			break;
		if (err != Z_OK)
		{
			if (err == Z_DATA_ERROR)
			{
				d_stream.next_in = (Bytef*)dummy_head;
				d_stream.avail_in = sizeof(dummy_head);
				if ((err = inflate(&d_stream, Z_NO_FLUSH)) != Z_OK)
				{
					return -1;
				}
			}
			else return -1;
		}
	}
	if (inflateEnd(&d_stream) != Z_OK) return -1;
	*ndata = d_stream.total_out;
	if (d_stream.total_in != nzdata)
		err = Z_BUF_ERROR;
	return err;
}

然后 我是这么调用的

_variant_t varRspBody = pHttpReq->GetResponseBody(); 
	ULONG dataLen = varRspBody.parray->rgsabound[0].cElements; 
	char *pContentBuffer = (char *)varRspBody.parray->pvData; 
	BYTE *btText = new BYTE[10000](); 
	ULONG ulLen = 10000; 
	httpgzdecompress((BYTE*)varRspBody.parray->pvData, dataLen, btText, &ulLen); 
	CString_Obj = (char*)btText; 
	delete btText;

为何最后显示的内容哦 显示不全 就是后面的全部显示为省略号了 我想获得全部的文本的话 应该怎么修改 求解决方案 谢谢

[祸起蛋炒饭]

引用 1 楼 zhao4zhong1 的回复:

10000太小。

我刚调试 跟这个值就没有关系

[赵4老师]

10000太小。

[encoderlee]

可以尝试取ResponseText而不要取ResponseBody看看。 gzip解压这种事情应该是由http库来完成的，这种事情都要自己来实现，那么未免太麻烦了。 所以还是仔细看一看文档，看看你用的这个http库能不能自动gzip解压。 WinHttp是可以自动处理gzip压缩的，我用WinHttp的C API一直都没有遇到过gzip解压问题。 你用的好像是WinHttp的COM接口，这个接口我没用过，不太清楚。

[祸起蛋炒饭]

我已经搞好了 之后还需要在转一下码 就能好了

[祸起蛋炒饭]

int CMainDlg::httpgzdecompress(BYTE *zdata, ULONG nzdata, BYTE *data, ULONG *ndata, CString &strBody)
{
	int err = 0;
	z_stream d_stream = {};
	static char dummy_head[2] =
	{
		0x8 + 0x7 * 0x10,
		(((0x8 + 0x7 * 0x10) * 0x100 + 30) / 31 * 31) & 0xFF,
	};

	d_stream.zalloc = (alloc_func)0;
	d_stream.zfree = (free_func)0;
	d_stream.opaque = (voidpf)0;
	d_stream.next_in = zdata;
	d_stream.avail_in = 0;
	d_stream.avail_out = 0;
	d_stream.next_out = data;
	if (inflateInit2(&d_stream, 47) != Z_OK) return -1;
	while (d_stream.total_out < *ndata && d_stream.total_in < nzdata)
	{
		d_stream.avail_in = d_stream.avail_out = 1; // force small buffers 
		if ((err = inflate(&d_stream, Z_NO_FLUSH)) == Z_STREAM_END)
			break;
		if (err != Z_OK)
		{
			if (err == Z_DATA_ERROR)
			{
				d_stream.next_in = (Bytef*)dummy_head;
				d_stream.avail_in = sizeof(dummy_head);
				if ((err = inflate(&d_stream, Z_NO_FLUSH)) != Z_OK)
				{
					return -1;
				}
			}
			else return -1;
		}
	}
	if (inflateEnd(&d_stream) != Z_OK) return -1;

	*ndata = d_stream.total_out;
	CString strTemp(data);
	ConvertUtf8ToGBK(strTemp);
	strBody = strTemp;
	if (d_stream.total_in != nzdata)
		err = Z_BUF_ERROR;
	return err;
}