主要用来格式化HTTP协议的，代码写的很烂，比不上string和CString，还望被批斗。
版权问题：Author: root的意思是Linux Root账户
用法：

bool setResponse::content_type(const char* str) {
	const char* mime = http::matchMime::getInstance().find_ext_name_mime(str);
	setResponse::str_.format("Content-Type: %s\r\n", mime);
	return true;
}
bool setResponse::content_encode() {
	setResponse::str_.append("Content-Encoding: deflate\r\n");
	return true;
}
bool setResponse::content_length(size_t len) {
	setResponse::str_.format("Content-Length: %ld\r\n", len);
	return true;
}
void setResponse::cache_control() {
	setResponse::str_.append("Cache-Control: no-cache\r\n");
}
bool setResponse::transfer_encoding() {
	setResponse::str_.append("Transfer-Encoding: chunked\r\n");
	return true;
}

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