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static FILE*   _CreateTmpFile(const char* pFileName){	char sFilePathName[256] = { 0 };	sprintf(sFilePathName, "%s%s", UPLOAD_FILES_PATH, pFileName);	if (0 == access(sFilePathName, F_OK))	{		remove(sFilePathName);	}	printf("=============create upload file name:%s\n", sFilePathName);	return fopen(sFilePathName, "ab");}void HttpServer::OnHttpEvent(mg_connection *connection, int event_type, void *event_data){	http_message *http_req = (http_message *)event_data;	struct file_writer_data *data = (struct file_writer_data *) connection->user_data;	struct mg_http_multipart_part *mp = (struct mg_http_multipart_part *) event_data;	switch (event_type)	{	case MG_EV_HTTP_REQUEST:		HandleEvent(connection, http_req);		break;	case MG_EV_HTTP_PART_BEGIN:		if (NULL == data)		{			data = new struct file_writer_data;		}		//创建文件		data->fp = _CreateTmpFile(mp->file_name);		if (NULL == data->fp)		{			mg_printf(connection, "%s",				"HTTP/1.1 500 Failed to open a file\r\n"				"Content-Length: 0\r\n\r\n");			connection->flags |= MG_F_SEND_AND_CLOSE;			delete data;			return;		}		//初始化文件长度为0		data->bytes_written = 0;		connection->user_data = (void*)data;		break;	case MG_EV_HTTP_PART_DATA:		if (fwrite(mp->data.p, 1, mp->data.len, data->fp) != mp->data.len) {			mg_printf(connection, "%s",				"HTTP/1.1 500 Failed to write to a file\r\n"				"Content-Length: 0\r\n\r\n");			connection->flags |= MG_F_SEND_AND_CLOSE;			return;		}		data->bytes_written += mp->data.len;		break;	case MG_EV_HTTP_PART_END:		printf("=============upload MG_EV_HTTP_PART_END \n");		mg_printf(connection,			"HTTP/1.1 200 OK\r\n"			"Content-Type: text/plain\r\n"			"Connection: close\r\n\r\n"			"Written %ld of POST data to a temp file\n\n",			(long)ftell(data->fp));		connection->flags |= MG_F_SEND_AND_CLOSE;		fclose(data->fp);		delete data;		data = NULL;		connection->user_data = NULL;		break;	default:		break;	}}

./curl --form "fileupload=@1.lpg" http://10.0.192.87/tmp/

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