add httpGet error handling

src/network/Network.cpp

@@ -9,7 +9,9 @@ using namespace network;
 
 static debug::Logger logger("network");
 
-size_t write_callback(char* ptr, size_t size, size_t nmemb, void* userdata) {
+static size_t write_callback(
+    char* ptr, size_t size, size_t nmemb, void* userdata
+) {
     auto& buffer = *reinterpret_cast<std::vector<char>*>(userdata);
     size_t psize = buffer.size();
     buffer.resize(psize + size * nmemb);
@@ -30,7 +32,8 @@ public:
         curl_easy_cleanup(curl);
     }
 
-    void get(const std::string& url, const OnResponse& callback) override {
+    void get(const std::string& url, OnResponse onResponse, OnReject onReject)
+        override {
         std::vector<char> buffer;
         curl_easy_setopt(curl, CURLOPT_URL, url.c_str());
         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_callback);
@@ -45,8 +48,16 @@ public:
                 totalDownload += size;
             }
             totalDownload += buffer.size();
+            if (onResponse) {
+                onResponse(std::move(buffer));
+            }
+        } else {
+            auto message = curl_easy_strerror(res);
+            logger.error() << message << " (" << url << ")";
+            if (onReject) {
+                onReject(message);
+            }
         }
-        callback(res, std::move(buffer));
     }
 
     size_t getTotalUpload() const override {
@@ -71,8 +82,10 @@ Network::Network(std::unique_ptr<Http> http) : http(std::move(http)) {
 
 Network::~Network() = default;
 
-void Network::httpGet(const std::string& url, const OnResponse& callback) {
+void Network::httpGet(
-    http->get(url, callback);
+    const std::string& url, OnResponse onResponse, OnReject onReject
+) {
+    http->get(url, onResponse, onReject);
 }
 
 size_t Network::getTotalUpload() const {

src/network/Network.hpp

@@ -9,13 +9,18 @@
 #include "util/Buffer.hpp"
 
 namespace network {
-    using OnResponse = std::function<void(int, std::vector<char>)>;
+    using OnResponse = std::function<void(std::vector<char>)>;
+    using OnReject = std::function<void(const char*)>;
 
     class Http {
     public:
         virtual ~Http() {}
 
-        virtual void get(const std::string& url, const OnResponse& callback) = 0;
+        virtual void get(
+            const std::string& url,
+            OnResponse onResponse,
+            OnReject onReject=nullptr
+        ) = 0;
         virtual size_t getTotalUpload() const = 0;
         virtual size_t getTotalDownload() const = 0;
     };
@@ -26,7 +31,11 @@ namespace network {
         Network(std::unique_ptr<Http> http);
         ~Network();
 
-        void httpGet(const std::string& url, const OnResponse& callback);
+        void httpGet(
+            const std::string& url,
+            OnResponse onResponse,
+            OnReject onReject = nullptr
+        );
 
         size_t getTotalUpload() const;
         size_t getTotalDownload() const;

test/network/curltest.cpp

@@ -9,9 +9,12 @@ TEST(curltest, curltest) {
     network->httpGet(
         "https://raw.githubusercontent.com/MihailRis/VoxelEngine-Cpp/refs/"
         "heads/curl/res/content/base/blocks/lamp.json",
-        [=](int code, std::vector<char> data) {
+        [](std::vector<char> data) {
-            auto v = std::string_view(data.data(), data.size());
+            if (data.empty()) {
-            auto value = json::parse(v);
+                return;
+            }
+            auto view = std::string_view(data.data(), data.size());
+            auto value = json::parse(view);
             std::cout << value << std::endl;
         }
     );