ported translator to curl, removed EL7 + Windows support

src/core/http_request.cpp

@@ -0,0 +1,94 @@
+/*****************************************************************************
+* dtranslatebot Discord Translate Bot
+* Copyright (C) 2026 Syping
+*
+* Redistribution and use in source and binary forms, with or without modification,
+* are permitted provided that the following conditions are met:
+*
+* 1. Redistributions of source code must retain the above copyright notice,
+* this list of conditions and the following disclaimer.
+*
+* 2. Redistributions in binary form must reproduce the above copyright notice,
+* this list of conditions and the following disclaimer in the documentation
+* and/or other materials provided with the distribution.
+*
+* This software is provided as-is, no warranties are given to you, we are not
+* responsible for anything with use of the software, you are self responsible.
+*****************************************************************************/
+
+#include "http_request.h"
+
+http_request::http_request() {
+    instance = curl_easy_init();
+    if (!instance)
+        throw std::bad_alloc();
+}
+
+http_response http_request::get(const std::string &url, const dpp::http_headers &headers) {
+    http_response response;
+    curl_easy_setopt(instance, CURLOPT_URL, url.c_str());
+    curl_slist *header_slist = nullptr;
+    if (!headers.empty()) {
+        for (const auto &header : headers) {
+            header_slist = curl_slist_append(header_slist, std::string(header.first + ": " + header.second).c_str());
+            if (!header_slist)
+                throw std::bad_alloc();
+        }
+    }
+    if (!header_slist)
+        curl_easy_setopt(instance, CURLOPT_HTTPHEADER, header_slist);
+    curl_easy_setopt(instance, CURLOPT_WRITEDATA, &response.content);
+    curl_easy_setopt(instance, CURLOPT_WRITEFUNCTION, &writer);
+    CURLcode result = curl_easy_perform(instance);
+    if (result == CURLE_OK)
+        curl_easy_getinfo(instance, CURLINFO_RESPONSE_CODE, &response.status);
+    curl_easy_reset(instance);
+    curl_slist_free_all(header_slist);
+    return response;
+}
+
+http_response http_request::post(const std::string &url, const std::string &content, const std::string &content_type, const dpp::http_headers &headers) {
+    http_response response;
+    curl_easy_setopt(instance, CURLOPT_URL, url.c_str());
+    curl_slist *header_slist = nullptr;
+    if (!content_type.empty()) {
+        header_slist = curl_slist_append(header_slist, std::string("Content-Type: " + content_type).c_str());
+        if (!header_slist)
+            throw std::bad_alloc();
+    }
+    if (!headers.empty()) {
+        for (const auto &header : headers) {
+            header_slist = curl_slist_append(header_slist, std::string(header.first + ": " + header.second).c_str());
+            if (!header_slist)
+                throw std::bad_alloc();
+        }
+    }
+    if (!header_slist)
+        curl_easy_setopt(instance, CURLOPT_HTTPHEADER, header_slist);
+    curl_easy_setopt(instance, CURLOPT_POSTFIELDS, content.data());
+    curl_easy_setopt(instance, CURLOPT_POSTFIELDSIZE, content.size());
+    curl_easy_setopt(instance, CURLOPT_WRITEDATA, &response.content);
+    curl_easy_setopt(instance, CURLOPT_WRITEFUNCTION, &writer);
+    CURLcode result = curl_easy_perform(instance);
+    if (result == CURLE_OK)
+        curl_easy_getinfo(instance, CURLINFO_RESPONSE_CODE, &response.status);
+    curl_easy_reset(instance);
+    curl_slist_free_all(header_slist);
+    return response;
+}
+
+std::string http_request::legacy_url(const std::string &hostname, uint16_t port, const std::string &url, bool tls) {
+    return (tls ? "https://" : "http://") + hostname + ":" + std::to_string(port) + (url.empty() ? "/" : (url.front() != '/' ? "/" + url : url));
+}
+
+http_request::~http_request() {
+    curl_easy_cleanup(instance);
+}
+
+size_t http_request::writer(char *source, size_t size, size_t nmemb, std::string *target) {
+    if (target == nullptr)
+        return 0;
+    size_t write_size = size * nmemb;
+    target->append(source, write_size);
+    return write_size;
+}