pdns/minicurl.hh

   1 /*
   2  * MIT License
   3  *
   4  * Copyright (c) 2018-2019 powerdns.com bv
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a copy
   7  * of this software and associated documentation files (the "Software"), to deal
   8  * in the Software without restriction, including without limitation the rights
   9  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10  * copies of the Software, and to permit persons to whom the Software is
  11  * furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in all
  14  * copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  19  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #pragma once
  26 #include <string>
  27 #include <curl/curl.h>
  28 #include "iputils.hh"
  29 // turns out 'CURL' is currently typedef for void which means we can't easily forward declare it
  30
  31 class MiniCurl
  32 {
  33 public:
  34   using MiniCurlHeaders = std::map<std::string, std::string>;
  35
  36   static void init();
  37
  38   MiniCurl(const string& useragent="MiniCurl/0.0");
  39   ~MiniCurl();
  40   MiniCurl& operator=(const MiniCurl&) = delete;
  41   std::string getURL(const std::string& str, const ComboAddress* rem=0, const ComboAddress* src=0);
  42   std::string postURL(const std::string& str, const std::string& postdata, MiniCurlHeaders& headers);
  43 private:
  44   CURL *d_curl;
  45   static size_t write_callback(char *ptr, size_t size, size_t nmemb, void *userdata);
  46   std::string d_data;
  47   struct curl_slist* d_header_list = nullptr;
  48   void setupURL(const std::string& str, const ComboAddress* rem=0, const ComboAddress* src=0);
  49   void setHeaders(const MiniCurlHeaders& headers);
  50   void clearHeaders();
  51 };