Сохранение данных из сети в буфер

main.cpp

@@ -1,11 +1,10 @@
 #include <iostream>
-#include <vector>
+#include <sstream>//Ôàéë <sstream> ïîäêëþ÷àåò stringstream — ïîòîê, êîòîðûé ìîæåò ÷èòàòü èç áóôåðà â ïàìÿòè
 #include <string>
-#include <algorithm>
-#include <sstream>
+#include <vector>
 #include <curl/curl.h>
-#include <sstream>
 #include "hictogram.h"
+#include "text.h"
 #include "svg.h"
 
 using namespace std;
@@ -16,6 +15,7 @@ struct Input {
 };
 
 Input input_data(istream& in, bool prompt) {
+
     if (prompt) {
         cerr << "Enter number count, numbers and bin count: ";
     }
@@ -35,15 +35,56 @@ Input input_data(istream& in, bool prompt) {
     return input;
 }
 
-int main() {
-    curl_global_init(CURL_GLOBAL_ALL);
+
+
+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) {
+    stringstream buffer;
+
+    CURL* curl = curl_easy_init();
+    if (curl) {
+        curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
+
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_data);
+        curl_easy_setopt(curl, CURLOPT_WRITEDATA, &buffer);
+
+        CURLcode res = curl_easy_perform(curl);
+
+        if (res != CURLE_OK) {
+            cerr << "cURL error: " << curl_easy_strerror(res) << endl;
+            curl_easy_cleanup(curl);
+            exit(1);
+        }
+
+        curl_easy_cleanup(curl);
+    } else {
+        cerr << "curl_easy_init() failed" << endl;
+        exit(1);
+    }
+
+    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);
+    }
+
     const auto bins = make_histogram(input.numbers, input.bin_count);
     show_histogram_svg(bins);
-    curl_global_cleanup();
 
     return 0;
 }
-
-