fix some lint

database/.flake8

@@ -0,0 +1,2 @@
+[flake8]
+max-line-length = 100

database/https.py

@@ -15,15 +15,16 @@
 import get_leaf_cert
 import data_factory
 
+
 class AcquireLock:
     """
     Create a TCP socket to ensure a single instance.
-    
-    This class creates a TCP socket that binds to a specific port. If an instance 
-    of this class is already running, it will log an error and exit. 
+
+    This class creates a TCP socket that binds to a specific port. If an instance
+    of this class is already running, it will log an error and exit.
 
     Example usage:
-    
+
     ```python
     lock = AcquireLock()
     try:
@@ -65,7 +66,6 @@ def __init__(self):
         self.misconfigured_server = False
         self.leaf_cert = None
 
-
     def validate_url(self, url):
         """Limit to used domains."""
         allowed_domains = (
@@ -80,7 +80,6 @@ def validate_url(self, url):
         logging.error("Invalid URL domain: %s", url)
         sys.exit(1)
 
-
     def head(self, curl):
         """Take the curl object to head state, with redirect."""
         if isinstance(curl, pycurl.Curl):
@@ -108,7 +107,6 @@ def head(self, curl):
             return buffer.getvalue().decode('utf-8')
         return ""
 
-
     def validate_data_type(self, content_type):
         """Limit to used data types."""
         valid_content_types = {
@@ -118,14 +116,13 @@ def validate_data_type(self, content_type):
             'image/jpeg',
             'image/png',
             'text/html',
-            'head' # this is not MIME
+            'head'  # this is not MIME
         }
 
         if content_type not in valid_content_types:
             logging.error("Invalid content type: %s", content_type)
             sys.exit(1)
 
-
     def set_leaf(self, curl):
         """Write the certificate to a temporary file manually"""
         if self.leaf_cert is None:
@@ -141,7 +138,6 @@ def set_leaf(self, curl):
         curl.setopt(pycurl.CAINFO, temp_cert_path)
         return temp_cert_path
 
-
     def get_leaf(self, url):
         """Check if we need to grab the first certificate"""
         if not self.misconfigured_server:
@@ -164,7 +160,6 @@ def setup_before_get_response(self, url, content_type):
         if url.startswith("https://www.trle.net/") and not self.misconfigured_server:
             self.get_leaf(url)
 
-
     def get_response(self, url, content_type):
         """Handle all https requests"""
         self.setup_before_get_response(url, content_type)
@@ -217,7 +212,7 @@ def get_response(self, url, content_type):
                 break
 
             except pycurl.error as curl_error:
-                #if curl_error.args[0] == 60:  # SSL certificate error
+                # if curl_error.args[0] == 60:  # SSL certificate error
                 logging.error("Request failed: %s", curl_error)
                 retries += 1
                 if retries >= max_retries:
@@ -230,7 +225,6 @@ def get_response(self, url, content_type):
 
         return self.close_response(curl, headers, response_buffer, content_type)
 
-
     def close_response(self, curl, headers, response_buffer, content_type):
         """Pack response and close curl"""
         if curl is None:
@@ -251,11 +245,10 @@ def close_response(self, curl, headers, response_buffer, content_type):
             response = self.pack_response_buffer(content_type, response_buffer)
             curl.close()
             return response
-        logging.error("Unexpected content type: %s, expected %s", \
-                response_content_type, content_type)
+        logging.error("Unexpected content type: %s, expected %s",
+                      response_content_type, content_type)
         sys.exit(1)
 
-
     def pack_response_buffer(self, content_type, response_buffer):
         """Validate and return the response based on content type"""
         if content_type == 'text/html':
@@ -276,7 +269,6 @@ def pack_response_buffer(self, content_type, response_buffer):
         logging.error("Unsupported content type: %s", content_type)
         return None
 
-
     def extract_content_type(self, headers):
         """Read the header lines to look for content-type"""
 
@@ -313,11 +305,12 @@ def progress_callback(self, total_to_download, downloaded, total_to_upload, uplo
         if total_to_download > 0:
             if self.progress_bar is None:
                 # Initialize the progress bar if it's not set
-                self.progress_bar= tqdm(total=total_to_download,
-                        unit='B',
-                        unit_scale=True,
-                        unit_divisor=1024,
-                        desc="Downloading")
+                self.progress_bar = tqdm(total=total_to_download,
+                                         unit='B',
+                                         unit_scale=True,
+                                         unit_divisor=1024,
+                                         desc="Downloading")
+
             self.progress_bar.update(downloaded - self.progress_bar.n)  # Update the progress bar
             self.progress_bar.total = total_to_download
         return 0  # Returning 0 means to continue
@@ -389,11 +382,12 @@ def download_file(self, url):
             curl.setopt(pycurl.WRITEDATA, self.buffer)
 
             # Enable progress meter
-            self.progress_bar= tqdm(total=total_size,
-                    unit='B',
-                    unit_scale=True,
-                    unit_divisor=1024,
-                    desc="Downloading")
+            self.progress_bar = tqdm(total=total_size,
+                                     unit='B',
+                                     unit_scale=True,
+                                     unit_divisor=1024,
+                                     desc="Downloading")
+
             curl.setopt(pycurl.NOPROGRESS, False)
             curl.setopt(pycurl.XFERINFOFUNCTION, self.progress_callback)
 
@@ -435,6 +429,7 @@ def download_file(self, url):
 REQUEST_HANDLER = RequestHandler()
 DOWNLOADER = Downloader()
 
+
 def get(url, content_type):
     """
     Get server response from TRLE or Trcustom hosts

database/scrape.py

@@ -23,16 +23,17 @@
 # Some basic URL converters
 ###############################################################################
 
+
 def trle_search_parser(url):
     """
     Prepares a URL for level title searches on TRLE by encoding special characters.
-    
-    Note: This function should generally be avoided in favor of searching the local 
+
+    Note: This function should generally be avoided in favor of searching the local
     database, as it may not fully cover all cases or include recent updates.
-    
+
     Args:
         url (str): The original URL string to be formatted for TRLE search compatibility.
-        
+
     Returns:
         str: The formatted URL with specific characters
         replaced to match TRLE encoding requirements.
@@ -46,10 +47,10 @@ def trle_search_parser(url):
 def url_postfix(url):
     """
     Extracts the file extension from a URL without the leading dot.
-    
+
     Args:
         url (str): The URL to extract the file extension from.
-    
+
     Returns:
         str: The file extension without the leading dot,
         or an empty string if no extension is present.

src/Network.cpp

@@ -15,11 +15,11 @@
  */
 
 #include "Network.h"
+#include <curl/curl.h>
 #include <iostream>
 #include <string>
 #include <boost/asio.hpp>
 #include <boost/asio/ssl.hpp>
-#include <curl/curl.h>
 
 namespace ssl = boost::asio::ssl;
 using tcp = boost::asio::ip::tcp;
@@ -44,7 +44,7 @@ std::string get_ssl_certificate(const std::string& host) {
     BIO* bio = BIO_new(BIO_s_mem());
     PEM_write_bio_X509(bio, cert);
     char* cert_str = nullptr;
-    long cert_len = BIO_get_mem_data(bio, &cert_str);
+    qint64 cert_len = BIO_get_mem_data(bio, &cert_str);
     std::string cert_buffer(cert_str, cert_len);
 
     BIO_free(bio);
@@ -93,7 +93,7 @@ int Downloader::progress_callback(
 
         // Emit signal only if progress has increased by at least 1%
         static int lastEmittedProgress = 0;
-        if ((int)progress == 0) lastEmittedProgress = 0;
+        if (static_cast<int>(progress) == 0) lastEmittedProgress = 0;
         if (static_cast<int>(progress) > lastEmittedProgress)
         {
             static Downloader& instance = Downloader::getInstance();
@@ -122,8 +122,16 @@ int Downloader::getStatus()
 
 void Downloader::saveToFile(const QByteArray& data, const QString& filePath)
 {
+    QFileInfo fileInfo(filePath);
+
+    if (fileInfo.exists() && !fileInfo.isFile()) {
+        qDebug() << "Error: The zip path is not a regular file." << filePath;
+        return;
+    }
+
     QFile file(filePath);
-    if (file.open(QIODevice::WriteOnly))
+
+    if (file.open(QIODevice::WriteOnly))  // flawfinder: ignore
     {
         file.write(data);
         file.close();
@@ -144,9 +152,17 @@ void Downloader::run()
     QByteArray byteArray = urlString.toUtf8();
     const char* url_cstring = byteArray.constData();
 
-    QString filePath = levelDir_m.absolutePath() + QDir::separator() + file_m;
+    const QString filePath = levelDir_m.absolutePath() +
+            QDir::separator() + file_m;
 
-    FILE* file = fopen(filePath.toUtf8().constData(), "wb");
+    QFileInfo fileInfo(filePath);
+
+    if (fileInfo.exists() && !fileInfo.isFile()) {
+        qDebug() << "Error: The zip path is not a regular file." << filePath;
+        return;
+    }
+
+    FILE* file = fopen(filePath.toUtf8(), "wb");  // flawfinder: ignore
     if (!file)
     {
         qDebug() << "Error opening file for writing:" << filePath;
@@ -162,22 +178,25 @@ void Downloader::run()
 
         // Set up the in-memory blob for curl to use
         curl_blob blob;
-        blob.data = const_cast<void*>(static_cast<const void*>(cert_buffer.data()));
-        //blob.data = cert_buffer.data();
+        blob.data = cert_buffer.data();
         blob.len = cert_buffer.size();
         blob.flags = CURL_BLOB_COPY;
 
         curl_easy_setopt(curl, CURLOPT_URL, url_cstring);
         curl_easy_setopt(curl, CURLOPT_CAINFO_BLOB, &blob);
-        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, Downloader::write_callback);
+        curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION,
+                Downloader::write_callback);
+
         curl_easy_setopt(curl, CURLOPT_WRITEDATA, &writeData);
 
         // Follow redirects
         curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
 
         // Enable progress meter
         curl_easy_setopt(curl, CURLOPT_NOPROGRESS, 0L);
-        curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION, Downloader::progress_callback);
+        curl_easy_setopt(curl, CURLOPT_XFERINFOFUNCTION,
+                Downloader::progress_callback);
+
         curl_easy_setopt(curl, CURLOPT_XFERINFODATA, nullptr);
 
         // Perform the download
@@ -186,16 +205,16 @@ void Downloader::run()
         if (res != CURLE_OK)
         {
             status_m = 1;
-            qDebug() << "curl_easy_perform() failed:" << curl_easy_strerror(res);
+            qDebug() << "CURL failed:" << curl_easy_strerror(res);
             // we need to catch any of those that seem inportant here to the GUI
             // and reset GUI state
             // https://curl.se/libcurl/c/libcurl-errors.html
-            if(res == 6 || res == 7 || res == 28 || res == 35)
+            if (res == 6 || res == 7 || res == 28 || res == 35)
             {
                 emit this->networkWorkErrorSignal(1);
                 QCoreApplication::processEvents();
             }
-            else if(res == CURLE_PEER_FAILED_VERIFICATION)
+            else if (res == CURLE_PEER_FAILED_VERIFICATION)
             {
                 emit this->networkWorkErrorSignal(2);
                 QCoreApplication::processEvents();