lab4 базовый вариант с рабочим curl

sem2_lab1/sem2_lab1.cpp

@@ -7,6 +7,8 @@
 #include "show_histogram.h"
 #include "svg.h"
 #include <curl/curl.h>
+#include <sstream>
+#include <string>
 using namespace std;
 
 struct Input {
@@ -27,30 +29,48 @@ Input input_data(istream& in,bool prompt)
     in >> in_data.bin_count;
     return in_data;
 }
+
+static 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((char*)items, data_size);
+    return data_size;
+}
+Input download(const string& address) 
+{
+    stringstream buffer;
+    CURL* curl = curl_easy_init();
+    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)
+        {
+            fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
+            exit(1);
+        }
+        curl_easy_cleanup(curl);
+    }
+    return input_data(buffer, false);
+}
+
+
 int main(int argc, char* argv[])
 {
-    if (argc > 1) 
-    {
-        CURL* curl = curl_easy_init();
-        if (curl) 
-        {
-            CURLcode res;
-            curl_easy_setopt(curl, CURLOPT_URL, argv[1]);
-            res = curl_easy_perform(curl);
-            if (res != CURLE_OK)
-            {       
-                    fprintf(stderr, "curl_easy_perform() failed: %s\n", curl_easy_strerror(res));
-                    exit(1);
-            }
-         curl_easy_cleanup(curl);
-         cout << res <<endl ;
-        }
-        return 0;
-    }
     curl_global_init(CURL_GLOBAL_ALL);
-    auto in = input_data(cin,true);
-    auto bins = make_histogram(in.numbers, in.bin_count);
-    show_histogram_svg(bins,in.numbers.size());
+    Input input;
+    if (argc > 1) {
+        input = download(argv[1]);
+    }
+    else {
+        input = input_data(cin, true);
+    }
+    auto bins = make_histogram(input.numbers, input.bin_count);
+    show_histogram_svg(bins, input.numbers.size());
     return 0;
 }