Method ExtractAddressHelper

libi2pd_client/HTTPProxy.cpp:228–279

	}

	bool HTTPReqHandler::ExtractAddressHelper(i2p::http::URL& url, std::string& jump, bool& confirm)
	{
		confirm = false;
		const char *param = "i2paddresshelper=";
		std::size_t pos = url.query.find(param);
		std::size_t len = std::strlen(param);
		std::map<std::string, std::string> params;


		if (pos == std::string::npos)
			return false; /* not found */
		if (!url.parse_query(params))
			return false;

		std::string value = params["i2paddresshelper"];
		len += value.length();
		jump = i2p::http::UrlDecode(value);
		if (!VerifyAddressHelper (jump))
		{
			LogPrint (eLogError, "HTTPProxy: Malformed jump link ", jump);
			return false;
		}

		// if we need update exists, request formed with update param
		if (params["update"] == "true")
		{
			len += std::strlen("&update=true");
			confirm = true;
		}

		// if helper is not only one query option and it placed after user's query
		if (pos != 0 && url.query[pos-1] == '&')
		{
			pos--;
			len++;
		}
		// if helper is not only one query option and it placed before user's query
		else if (pos == 0 && url.query.length () > len && url.query[len] == '&')
		{
			// we don't touch the '?' but remove the trailing '&'
			len++;
		}
		else
		{
			// there is no more query options, resetting hasquery flag
			url.hasquery = false;
		}

		// reset hasquery flag and remove addresshelper from URL
		url.query.replace(pos, len, "");
		return true;
	}

	bool HTTPReqHandler::VerifyAddressHelper (std::string_view jump)
	{