refactored curl code into new helper class

main.cpp

@@ -13,8 +13,8 @@
 #include <vector>
 #include <cstring>
 #include <getopt.h>
-#include <curl/curl.h>
 #include <libsclogging.hpp>
+#include "requester.hpp"
 
 sc::logger logger {"curly", sc::loglevel::info};
 
@@ -28,16 +28,6 @@ void print_version() {
     std::cout << "curly version 1.0\n";
 }
 
-size_t write_data(void* buf, size_t sz, size_t nmemb, void* userp) {
-    size_t realsize = sz * nmemb;
-    SCInfo(logger, "received ", realsize, " bytes");
-    std::vector<char>* dest {reinterpret_cast<std::vector<char>*>(userp)};
-    size_t oldsize = dest->size();
-    dest->resize(oldsize + realsize);
-    std::memcpy(dest->data() + oldsize, buf, realsize);
-    return realsize;
-}
-
 int main(int argc, const char * argv[]) {
     try {
         int opt_char, opt_val;
@@ -76,27 +66,10 @@ int main(int argc, const char * argv[]) {
             }
         }
         std::cout << "hello, curly\n";
+        requester req;
+        std::cout << req.get("https://www.swiftcoder.nl/") << '\n';
+        std::cout << req.get("https://www.swiftcoder.nl/moneydance/") << '\n';
 
-        curl_global_init(CURL_GLOBAL_ALL);
-        auto easy_handle = curl_easy_init();
-        curl_easy_setopt(easy_handle, CURLOPT_URL, "https://www.swiftcoder.nl/");
-        curl_easy_setopt(easy_handle, CURLOPT_WRITEFUNCTION, write_data);
-        std::vector<char> buf;
-        curl_easy_setopt(easy_handle, CURLOPT_WRITEDATA, &buf);
-        auto success = curl_easy_perform(easy_handle);
-        if (success != CURLE_OK) throw std::runtime_error("could not get remote data");
-
-        std::string text {buf.data(), buf.size()};
-        std::cout << text << '\n';
-
-        curl_easy_setopt(easy_handle, CURLOPT_URL, "https://www.swiftcoder.nl/moneydance/");
-        buf.clear();
-        success = curl_easy_perform(easy_handle);
-        if (success != CURLE_OK) throw std::runtime_error("could not get remote data");
-
-        std::string page2 {buf.data(), buf.size()};
-        std::cout << page2 << '\n';
-        
     } catch (const std::exception& ex) {
         std::cerr << "curly: " << ex.what() << '\n';
         return EXIT_FAILURE;

requester.cpp

@@ -0,0 +1,40 @@
+//
+// requester.cpp
+// curly
+//
+// Created by Bob Polis at 2020-09-01
+// Copyright (c) 2020 SwiftCoder. All rights reserved.
+//
+
+#include "requester.hpp"
+#include <libsclogging.hpp>
+#include <vector>
+#include <cstring>
+
+extern sc::logger logger;
+
+size_t requester::write_data(char *buf, size_t sz, size_t nmemb, void *user_data) {
+    size_t realsize = sz * nmemb;
+    SCInfo(logger, "received ", realsize, " bytes");
+    std::vector<char>* dest {reinterpret_cast<std::vector<char>*>(user_data)};
+    size_t oldsize = dest->size();
+    dest->resize(oldsize + realsize);
+    std::memcpy(dest->data() + oldsize, buf, realsize);
+    return realsize;
+}
+
+requester::requester() {
+        curl_global_init(CURL_GLOBAL_ALL);
+        _h = curl_easy_init();
+        curl_easy_setopt(_h, CURLOPT_WRITEFUNCTION, write_data);
+}
+
+std::string requester::get(const std::string &url) {
+    curl_easy_setopt(_h, CURLOPT_URL, url.c_str());
+    std::vector<char> buf;
+    curl_easy_setopt(_h, CURLOPT_WRITEDATA, &buf);
+    auto success = curl_easy_perform(_h);
+    if (success != CURLE_OK) throw std::runtime_error("could not get remote data");
+    std::string text {buf.data(), buf.size()};
+    return text;
+}

requester.hpp

@@ -0,0 +1,27 @@
+//
+// requester.hpp
+// curly
+//
+// Created by Bob Polis at 2020-09-01
+// Copyright (c) 2020 SwiftCoder. All rights reserved.
+//
+
+#ifndef _requester_H_
+#define _requester_H_
+
+#include <string>
+#include <curl/curl.h>
+
+class requester {
+    public:
+        static size_t write_data(char* buf, size_t sz, size_t nmemb, void* user_data);
+
+        requester();
+        
+        std::string get(const std::string& url);
+
+    private:
+        CURL* _h;
+};
+
+#endif // _requester_H_