code: сохранение данных в буфер

main.cpp

@@ -5,6 +5,9 @@
 #include "histogram_internal.h"
 #include "svg.h"
 #include <curl/curl.h>
+#include <sstream>
+#include <string>
+
 
 using namespace std;
 const size_t SCREEN_WIDTH = 80;
@@ -40,25 +43,47 @@ Input input_data(istream& stream, bool prompt)
 
 }
 
-int main(int argc, char* argv[])
+size_t write_data(void* items, size_t item_size, size_t item_count, void* ctx) {
-{
+   size_t data_size = item_size * item_count;
+    stringstream* buffer = reinterpret_cast<stringstream*>(ctx);
+    auto text = reinterpret_cast<const char*>(items);
+    buffer->write(text, data_size);
+    return data_size;
+}
+
+Input download(const string& address) {
+    stringstream buffer;
+
     curl_global_init(CURL_GLOBAL_ALL);
-    if (argc > 1)
-    {
     CURL * curl = curl_easy_init();
+
     if(curl)
     {
         CURLcode res;
-            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
         res = curl_easy_perform(curl);
+
         if(res != CURLE_OK){
             curl_easy_strerror(res);
             exit(1);
         }
         curl_easy_cleanup(curl);
     }
-        return 0;
+    return input_data(buffer, false);
+}
+
+
+int main(int argc, char* argv[])
+{
+    Input input;
+    if (argc > 1) {
+        input = download(argv[1]);
+    } else {
+        input = input_data(cin, true);
     }
+
     bool prompt = true;
     auto in = input_data(cin, prompt);