From bcb9cecec2c1fc21a06cd9d2f112fe4681baaa57 Mon Sep 17 00:00:00 2001
From: KozlovDanD <KozlovDanD@mpei.ru>
Date: Wed, 11 Jun 2025 11:56:56 +0300
Subject: [PATCH] =?UTF-8?q?=D0=B2:17?=
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---
 main.cpp | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/main.cpp b/main.cpp
index 71a1e12..4feee29 100644
--- a/main.cpp
+++ b/main.cpp
@@ -1,3 +1,9 @@
+/* Документация cURL:
+CURLOPT_FAILONERROR:
+https://curl.se/libcurl/c/CURLOPT_FAILONERROR.html
+https://curl.se/libcurl/c/libcurl-errors.html#CURLEHTTPRETURNEDERROR
+*/
+
 #include <iostream>
 #include <vector>
 #include "histogram.h"
@@ -57,13 +63,23 @@ download(const string& address)
     {
         curl_easy_setopt(curl, CURLOPT_URL, address.c_str());
 
+    // -----вар 17
+        curl_easy_setopt(curl, CURLOPT_FAILONERROR, 1L); //Превращает HTTP-ошибки (статусы 4xx и 5xx) в ошибки cURL
+    //-------
+
         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;
+            // -----вар 17
+           if (res == CURLE_HTTP_RETURNED_ERROR) {
+                cerr << "HTTP Error: Server returned 4xx/5xx status code for URL: " << address << endl; //Точечно обрабатываем случай, когда сервер вернул ошибку
+            } else {
+                cerr << "cURL error (" << res << "): " << curl_easy_strerror(res) << endl;
+            }
+            //--------
             curl_easy_cleanup(curl);
             exit(1);
         }