code: data stream

main.cpp

@@ -1,6 +1,8 @@
 #include <iostream>
 #include <vector>
 #include <curl/curl.h>
+#include <sstream>
+#include <string>
 #include "histogram.h"
 #include "text.h"
 #include "svg.h"
@@ -30,14 +32,13 @@ Input input_data(istream& in, bool prompt = true)
     in >> input.bin_count;
     return input;
 }
-
-int main(int argc, char* argv[])
-{
-    if (argc > 1) {
+Input
+download(const string& address) {
+    stringstream buffer;
     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());
         res = curl_easy_perform(curl);
         if (res!=CURLE_OK){
             cerr << curl_easy_strerror(res);
@@ -45,12 +46,20 @@ int main(int argc, char* argv[])
         }
         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 show_prompts;
     cout << "Show prompts? (1 for yes, 0 for no): ";
     cin >> show_prompts;
-    Input in = input_data(cin, show_prompts);
-    vector<size_t> bins = make_histogram(in.numbers, in.bin_count);
+    const auto bins = make_histogram(input.numbers, input.bin_count);
     show_histogram_svg(bins);
 }