code: Сохранение данных из сети в буфер

main.cpp

@@ -31,6 +31,13 @@ Input input_data(istream& in, bool prompt = true)
         cerr << "Enter bin count: ";
     in >> input.bin_count;
     return input;
+}
+	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);
+    (*buffer).write(reinterpret_cast<const char*>(items), data_size);
+    return data_size;
 }
 Input
 download(const string& address) {
@@ -39,6 +46,8 @@ download(const string& address) {
     if(curl) {
         CURLcode res;
         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){
             cerr << curl_easy_strerror(res);
@@ -51,15 +60,15 @@ download(const string& address) {
 
 int main(int argc, char* argv[])
 {
+    bool show_prompts;
+    cout << "Show prompts? (1 for yes, 0 for no): ";
+    cin >> show_prompts;
     Input input;
     if (argc > 1) {
         input = download(argv[1]);
     } else {
         input = input_data(cin, true);
     }
-    bool show_prompts;
-    cout << "Show prompts? (1 for yes, 0 for no): ";
-    cin >> show_prompts;
     const auto bins = make_histogram(input.numbers, input.bin_count);
     show_histogram_svg(bins);
 }