UI: Add update checks (#715)

src/dusk/http/http.hpp

@@ -0,0 +1,59 @@
+#ifndef DUSK_HTTP_HTTP_HPP
+#define DUSK_HTTP_HTTP_HPP
+
+#include <chrono>
+#include <cstddef>
+#include <string>
+#include <vector>
+
+namespace dusk::http {
+
+enum class Backend {
+    None,
+    WinHttp,
+    UrlSession,
+    LibCurl,
+};
+
+enum class Error {
+    None,
+    NoBackend,
+    InvalidUrl,
+    UnsupportedScheme,
+    Timeout,
+    TooLarge,
+    Network,
+};
+
+struct Header {
+    std::string name;
+    std::string value;
+};
+
+struct Request {
+    std::string url;
+    std::vector<Header> headers;
+    std::chrono::milliseconds timeout{10000};
+    size_t maxBodyBytes = 1024 * 1024;
+};
+
+struct Response {
+    int statusCode = 0;
+    std::vector<Header> headers;
+    std::string body;
+};
+
+struct Result {
+    Error error = Error::None;
+    std::string message;
+    Response response;
+};
+
+bool available() noexcept;
+Backend backend() noexcept;
+const char* backend_name() noexcept;
+Result get(const Request& request);
+
+}  // namespace dusk::http
+
+#endif  // DUSK_HTTP_HTTP_HPP