[Bugreport] Misuse of vector.resize in Request.resize()

[vrqq]

cinatra/include/cinatra/request.hpp

Lines 731 to 734 in e461b52

	void resize(size_t size) {
	copy_method_url();
	buf_.resize(size);
	}

I saw a lot of reference on the pointer request.buf_.data() in source code.
But you also use vector.resize() here, that may cause memory reallocation.

(￣▽￣")

[qicosmos]

在resize之前已经把需要拷贝出来的东西都拷贝了。

[vrqq]

READ of size 1 at 0x61d00000fabe thread T6
    #0 0x761da6 in cinatra::iequal(char const*, unsigned long, char const*) 
    #1 0x778459 in cinatra::request::get_header_value(std::basic_string_view<char, std::char_traits<char> >) const
    #2 ......
SUMMARY: AddressSanitizer: heap-use-after-free in cinatra::iequal(char const*, unsigned long, char const*)

cinatra/include/cinatra/request.hpp

Lines 53 to 56 in e461b52

	header_len_ = phr_parse_request(buf_.data(), cur_size_, &method_,
	&method_len_, &url_, &url_len_,
	&minor_version_, headers_, &num_headers_, last_len);

You may forgot that struct phr_header headers_[32];

[qicosmos]

谢谢你指出这个问题，我已经增加了拷贝header了，可以保证resize的时候信息不会丢掉。