added get_dns_servers_table and fix some errors

src/settings/dns/dns.hpp

@@ -5,5 +5,6 @@
 
 void get_dns(const httplib::Request &request, httplib::Response &response);
 void set_dns(const httplib::Request &request, httplib::Response &response);
+void get_dns_servers(const httplib::Request &request, httplib::Response &response);
 
 #endif // DNS_HPP

src/settings/dns/dns_servers.cpp

@@ -0,0 +1,48 @@
+#include "dns.hpp"
+#include <colors.h>
+#include <json.hpp>
+#include "../../routes.hpp"
+#include "../../types.hpp"
+
+// #define DNS_REQUIRED_STRING R"({"required":"[token,enabled]"})"
+
+void get_dns_servers(const httplib::Request &request, httplib::Response &response) {
+    std::cout << GREEN << request.path << RESET << "  " << request.method << std::endl;
+    response.set_header("Access-Control-Allow-Origin", "*");
+    if (request.body.empty()) {
+        response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
+        return;
+    }
+
+    nlohmann::json json_body = nlohmann::json::parse(request.body);
+    if (json_body["token"] == nullptr) {
+        response.set_content(ACCESS_REQUIRED_STRING, JSON_TYPE);
+        return;
+    }
+
+    httplib::Client cli(AUTH_SERVICE);
+
+    std::stringstream body;
+    body <<  R"({"token":)" << json_body["token"] << R"(})";
+
+    httplib::Result res = cli.Post("/api/access", body.str().c_str(), JSON_TYPE);
+    if (res->status == httplib::OK_200) {
+        nlohmann::json resjson = nlohmann::json::parse(res->body);
+        if (resjson["access"] == "reject") {
+            response.set_content(resjson.dump().c_str(), JSON_TYPE);
+            return;
+        }
+        std::ifstream dnsserversfile("/etc/dnsmasq.conf.d/resolv.conf");
+        std::stringstream responsedata;
+        responsedata << R"({"servers":[")";
+        std::string dns_server_string = "";
+        while (std::getline(dnsserversfile, dns_server_string)) {
+            dns_server_string.erase(0, 11);
+            responsedata << dns_server_string << R"(",")";
+            dns_server_string = "";
+        }
+        responsedata.str(responsedata.str().erase(responsedata.str().size()-2, 2) + "]}");
+        dnsserversfile.close();
+        response.set_content(responsedata.str(), JSON_TYPE);
+    }
+}