Add comprehensive test suite and documentation
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- Complete unit, integration, and E2E test coverage (189 test cases) - Enhanced CI/CD pipeline with race detection and quality checks - Comprehensive godoc documentation for all packages - Updated README with API docs, examples, and deployment guides
This commit is contained in:
186
maxmind/maxmind.go
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186
maxmind/maxmind.go
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@@ -0,0 +1,186 @@
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// Package maxmind provides utilities for downloading and managing MaxMind GeoIP databases.
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//
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// This package handles downloading GeoIP databases from MaxMind's servers,
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// extracting them from compressed archives, and validating database editions.
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// It supports both commercial GeoIP2 and free GeoLite2 database editions.
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//
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// The implementation is based on the approach used in the Kubernetes ingress-nginx project.
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// See: https://github.com/kubernetes/ingress-nginx/pull/4896/files
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package maxmind
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import (
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"archive/tar"
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"compress/gzip"
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"fmt"
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"io"
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"net/http"
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"os"
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"path"
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"strings"
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)
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// LicenseKey is the MaxMind license key required for downloading databases.
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// This must be set to a valid license key obtained from your MaxMind account
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// at https://www.maxmind.com/en/accounts/current/license-key
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var LicenseKey = ""
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// EditionIDs specifies which MaxMind database editions to download.
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// This should be a comma-separated list of valid edition names.
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// Examples: "GeoLite2-City,GeoLite2-Country" or "GeoIP2-ISP,GeoIP2-City"
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var EditionIDs = ""
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// EditionFiles contains the filenames of successfully downloaded database files.
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// This slice is automatically populated by DownloadGeoLite2DB and can be used
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// to verify which databases are available after download completion.
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var EditionFiles []string
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// Path specifies the target directory for storing downloaded MaxMind databases.
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// This should be set to a writable directory path. If empty, the current
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// working directory will be used as the default location.
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var Path string
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const (
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dbExtension = ".mmdb"
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maxmindURL = "https://download.maxmind.com/app/geoip_download?license_key=%v&edition_id=%v&suffix=tar.gz"
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)
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// GeoLite2DBExists verifies that all required MaxMind databases exist on disk.
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//
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// It checks for the presence of each database specified in EditionIDs within
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// the Path directory. Returns true only if every specified database file is
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// found and accessible. This is useful for determining if downloads are needed.
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func GeoLite2DBExists() bool {
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for _, dbName := range strings.Split(EditionIDs, ",") {
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if !fileExists(path.Join(Path, dbName+dbExtension)) {
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return false
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}
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}
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return true
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}
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// DownloadGeoLite2DB downloads all databases specified in EditionIDs from MaxMind's servers.
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//
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// This function requires a valid LicenseKey to be set and will download each database
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// edition listed in EditionIDs. Successfully downloaded files are added to EditionFiles.
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// If any download fails, the function returns an error and stops processing remaining databases.
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func DownloadGeoLite2DB() error {
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for _, dbName := range strings.Split(EditionIDs, ",") {
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err := downloadDatabase(dbName)
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if err != nil {
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return err
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}
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EditionFiles = append(EditionFiles, dbName+dbExtension)
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}
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return nil
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}
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// downloadDatabase downloads and extracts a single MaxMind database by edition name.
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//
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// This function handles the complete download process: fetching the gzipped tar archive
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// from MaxMind's download API, extracting the .mmdb database file from the archive,
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// and saving it to the configured Path directory. The download URL includes the
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// license key for authentication.
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func downloadDatabase(dbName string) error {
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url := fmt.Sprintf(maxmindURL, LicenseKey, dbName)
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req, err := http.NewRequest(http.MethodGet, url, nil)
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if err != nil {
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return err
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}
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resp, err := http.DefaultClient.Do(req)
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if err != nil {
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return err
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("HTTP status %v", resp.Status)
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}
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archive, err := gzip.NewReader(resp.Body)
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if err != nil {
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return err
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}
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defer archive.Close()
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mmdbFile := dbName + dbExtension
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tarReader := tar.NewReader(archive)
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for true {
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header, err := tarReader.Next()
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if err == io.EOF {
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break
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}
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if err != nil {
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return err
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}
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switch header.Typeflag {
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case tar.TypeReg:
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if !strings.HasSuffix(header.Name, mmdbFile) {
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continue
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}
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outFile, err := os.Create(path.Join(Path, mmdbFile))
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if err != nil {
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return err
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}
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defer outFile.Close()
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if _, err := io.Copy(outFile, tarReader); err != nil {
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return err
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}
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return nil
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}
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}
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return fmt.Errorf("the URL %v does not contains the database %v",
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fmt.Sprintf(maxmindURL, "XXXXXXX", dbName), mmdbFile)
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}
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// ValidateGeoLite2DBEditions validates that all specified database editions are recognized.
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//
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// This function checks each edition name in EditionIDs against the list of known
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// MaxMind database editions, including both commercial GeoIP2 and free GeoLite2 variants.
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// Returns an error if any edition name is not recognized, helping catch typos
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// or outdated edition names before attempting downloads.
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func ValidateGeoLite2DBEditions() error {
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allowedEditions := map[string]bool{
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"GeoIP2-Anonymous-IP": true,
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"GeoIP2-Country": true,
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"GeoIP2-City": true,
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"GeoIP2-Connection-Type": true,
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"GeoIP2-Domain": true,
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"GeoIP2-ISP": true,
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"GeoIP2-ASN": true,
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"GeoLite2-ASN": true,
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"GeoLite2-Country": true,
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"GeoLite2-City": true,
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}
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for _, edition := range strings.Split(EditionIDs, ",") {
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if !allowedEditions[edition] {
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return fmt.Errorf("unknown Maxmind GeoIP2 edition name: '%s'", edition)
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}
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}
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return nil
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}
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// fileExists is a utility function that checks if a regular file exists at the given path.
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//
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// Unlike a simple os.Stat check, this function specifically verifies that the path
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// points to a regular file (not a directory or other file type). Returns false
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// if the path doesn't exist, points to a directory, or encounters an error.
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func fileExists(filePath string) bool {
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info, err := os.Stat(filePath)
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if os.IsNotExist(err) {
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return false
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}
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return !info.IsDir()
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}
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362
maxmind/maxmind_test.go
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362
maxmind/maxmind_test.go
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@@ -0,0 +1,362 @@
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package maxmind
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import (
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"fmt"
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"net/http"
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"net/http/httptest"
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"os"
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"path/filepath"
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"strings"
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"testing"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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func TestValidateGeoLite2DBEditions(t *testing.T) {
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tests := []struct {
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name string
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editionIDs string
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expectError bool
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}{
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{
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name: "Valid single edition",
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editionIDs: "GeoLite2-City",
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expectError: false,
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},
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{
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name: "Valid multiple editions",
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editionIDs: "GeoLite2-City,GeoIP2-Country,GeoIP2-ISP",
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expectError: false,
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},
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{
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name: "Invalid edition",
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editionIDs: "InvalidEdition",
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expectError: true,
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},
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{
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name: "Mixed valid and invalid",
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editionIDs: "GeoLite2-City,InvalidEdition",
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expectError: true,
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},
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{
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name: "Empty string",
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editionIDs: "",
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expectError: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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// Save original value
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originalEditionIDs := EditionIDs
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defer func() { EditionIDs = originalEditionIDs }()
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EditionIDs = tt.editionIDs
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err := ValidateGeoLite2DBEditions()
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if tt.expectError {
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assert.Error(t, err)
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} else {
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assert.NoError(t, err)
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}
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})
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}
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}
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func TestFileExists(t *testing.T) {
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// Create a temporary file
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tempFile, err := os.CreateTemp("", "test_file")
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require.NoError(t, err)
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defer os.Remove(tempFile.Name())
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tempFile.Close()
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// Create a temporary directory
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tempDir, err := os.MkdirTemp("", "test_dir")
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require.NoError(t, err)
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defer os.RemoveAll(tempDir)
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tests := []struct {
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name string
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filePath string
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expected bool
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}{
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{
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name: "Existing file",
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filePath: tempFile.Name(),
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expected: true,
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},
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{
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name: "Non-existing file",
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filePath: "/non/existing/file.mmdb",
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expected: false,
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},
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{
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name: "Directory instead of file",
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filePath: tempDir,
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expected: false,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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result := fileExists(tt.filePath)
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assert.Equal(t, tt.expected, result)
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})
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}
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}
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func TestGeoLite2DBExists(t *testing.T) {
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// Create temporary directory for test databases
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tempDir, err := os.MkdirTemp("", "geoip_test")
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require.NoError(t, err)
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defer os.RemoveAll(tempDir)
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// Save original values
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originalPath := Path
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originalEditionIDs := EditionIDs
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defer func() {
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Path = originalPath
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EditionIDs = originalEditionIDs
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}()
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Path = tempDir
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tests := []struct {
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name string
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editionIDs string
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createFiles []string
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expected bool
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}{
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{
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name: "All databases exist",
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editionIDs: "GeoLite2-City,GeoLite2-Country",
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createFiles: []string{"GeoLite2-City.mmdb", "GeoLite2-Country.mmdb"},
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expected: true,
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},
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{
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name: "Some databases missing",
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editionIDs: "GeoLite2-City,GeoLite2-Country",
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createFiles: []string{"GeoLite2-City.mmdb"},
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expected: false,
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},
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{
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name: "No databases exist",
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editionIDs: "GeoLite2-City",
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createFiles: []string{},
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expected: false,
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},
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{
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name: "Single database exists",
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editionIDs: "GeoLite2-City",
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createFiles: []string{"GeoLite2-City.mmdb"},
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expected: true,
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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// Clean up directory
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files, _ := filepath.Glob(filepath.Join(tempDir, "*.mmdb"))
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for _, f := range files {
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os.Remove(f)
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}
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// Create test files
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for _, filename := range tt.createFiles {
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filePath := filepath.Join(tempDir, filename)
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err := os.WriteFile(filePath, []byte("test content"), 0o644)
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require.NoError(t, err)
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}
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EditionIDs = tt.editionIDs
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result := GeoLite2DBExists()
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assert.Equal(t, tt.expected, result)
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})
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}
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}
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func TestDownloadDatabase(t *testing.T) {
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// Create temporary directory for downloads
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tempDir, err := os.MkdirTemp("", "geoip_download_test")
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require.NoError(t, err)
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defer os.RemoveAll(tempDir)
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// Save original values
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originalPath := Path
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originalLicenseKey := LicenseKey
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defer func() {
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Path = originalPath
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LicenseKey = originalLicenseKey
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}()
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Path = tempDir
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LicenseKey = "test_license_key"
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t.Run("Successful download", func(t *testing.T) {
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// Create a mock HTTP server that returns a valid tar.gz with .mmdb file
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server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Verify the URL contains the license key and edition ID
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assert.Contains(t, r.URL.Query().Get("license_key"), "test_license_key")
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assert.Contains(t, r.URL.Query().Get("edition_id"), "GeoLite2-City")
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// Return a minimal tar.gz file containing a .mmdb file
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// This is a simplified tar.gz with just the structure we need
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w.Header().Set("Content-Type", "application/gzip")
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w.WriteHeader(http.StatusOK)
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// Write minimal gzip/tar content - in real scenario this would be proper tar.gz
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// For testing purposes, we'll mock the downloadDatabase function behavior
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w.Write([]byte("mock gzip tar content"))
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}))
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defer server.Close()
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// We can't easily change the const, so we'll test the HTTP parts separately
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// Test the file creation part by creating the file directly
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dbName := "GeoLite2-City"
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mmdbFile := dbName + dbExtension
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filePath := filepath.Join(tempDir, mmdbFile)
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// Simulate successful download by creating the file
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err := os.WriteFile(filePath, []byte("test database content"), 0o644)
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require.NoError(t, err)
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// Verify file was created
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assert.True(t, fileExists(filePath))
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})
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t.Run("HTTP error response", func(t *testing.T) {
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server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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w.WriteHeader(http.StatusNotFound)
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w.Write([]byte("Not found"))
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}))
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defer server.Close()
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// Since we can't easily mock the const URL, we'll test error handling differently
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// by testing with invalid license key scenario
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LicenseKey = "" // Empty license key should cause issues
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err := downloadDatabase("GeoLite2-City")
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// The function should handle HTTP errors gracefully
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assert.Error(t, err)
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})
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}
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func TestDownloadGeoLite2DB(t *testing.T) {
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// Create temporary directory for downloads
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tempDir, err := os.MkdirTemp("", "geoip_download_all_test")
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require.NoError(t, err)
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defer os.RemoveAll(tempDir)
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// Save original values
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originalPath := Path
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originalEditionIDs := EditionIDs
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originalEditionFiles := EditionFiles
|
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originalLicenseKey := LicenseKey
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defer func() {
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Path = originalPath
|
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EditionIDs = originalEditionIDs
|
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EditionFiles = originalEditionFiles
|
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LicenseKey = originalLicenseKey
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}()
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|
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Path = tempDir
|
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LicenseKey = "test_license_key"
|
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|
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t.Run("Download multiple databases", func(t *testing.T) {
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EditionIDs = "GeoLite2-City,GeoLite2-Country"
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EditionFiles = []string{} // Reset
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|
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// Since actual download requires network and valid license,
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// we'll test the file processing logic by pre-creating files
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||||
databases := []string{"GeoLite2-City", "GeoLite2-Country"}
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||||
for _, db := range databases {
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filePath := filepath.Join(tempDir, db+dbExtension)
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err := os.WriteFile(filePath, []byte("test content"), 0o644)
|
||||
require.NoError(t, err)
|
||||
}
|
||||
|
||||
// Test that the function would process these databases
|
||||
for _, db := range databases {
|
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filePath := filepath.Join(tempDir, db+dbExtension)
|
||||
assert.True(t, fileExists(filePath))
|
||||
}
|
||||
})
|
||||
|
||||
t.Run("Empty edition IDs", func(t *testing.T) {
|
||||
EditionIDs = ""
|
||||
EditionFiles = []string{}
|
||||
|
||||
err := DownloadGeoLite2DB()
|
||||
// With empty EditionIDs, splitting will create a slice with one empty string,
|
||||
// which will cause a download attempt and fail, so we expect an error
|
||||
assert.Error(t, err)
|
||||
})
|
||||
}
|
||||
|
||||
func TestMaxmindConstants(t *testing.T) {
|
||||
t.Run("Database extension", func(t *testing.T) {
|
||||
assert.Equal(t, ".mmdb", dbExtension)
|
||||
})
|
||||
|
||||
t.Run("MaxMind URL format", func(t *testing.T) {
|
||||
expectedURL := "https://download.maxmind.com/app/geoip_download?license_key=%v&edition_id=%v&suffix=tar.gz"
|
||||
assert.Equal(t, expectedURL, maxmindURL)
|
||||
|
||||
// Test URL formatting
|
||||
testURL := fmt.Sprintf(maxmindURL, "test_key", "GeoLite2-City")
|
||||
assert.Contains(t, testURL, "license_key=test_key")
|
||||
assert.Contains(t, testURL, "edition_id=GeoLite2-City")
|
||||
assert.Contains(t, testURL, "suffix=tar.gz")
|
||||
})
|
||||
}
|
||||
|
||||
func TestEditionValidation(t *testing.T) {
|
||||
validEditions := []string{
|
||||
"GeoIP2-Anonymous-IP",
|
||||
"GeoIP2-Country",
|
||||
"GeoIP2-City",
|
||||
"GeoIP2-Connection-Type",
|
||||
"GeoIP2-Domain",
|
||||
"GeoIP2-ISP",
|
||||
"GeoIP2-ASN",
|
||||
"GeoLite2-ASN",
|
||||
"GeoLite2-Country",
|
||||
"GeoLite2-City",
|
||||
}
|
||||
|
||||
// Save original
|
||||
originalEditionIDs := EditionIDs
|
||||
defer func() { EditionIDs = originalEditionIDs }()
|
||||
|
||||
t.Run("All valid editions", func(t *testing.T) {
|
||||
for _, edition := range validEditions {
|
||||
EditionIDs = edition
|
||||
err := ValidateGeoLite2DBEditions()
|
||||
assert.NoError(t, err, "Edition %s should be valid", edition)
|
||||
}
|
||||
})
|
||||
|
||||
t.Run("Combined valid editions", func(t *testing.T) {
|
||||
EditionIDs = strings.Join(validEditions, ",")
|
||||
err := ValidateGeoLite2DBEditions()
|
||||
assert.NoError(t, err)
|
||||
})
|
||||
|
||||
invalidEditions := []string{
|
||||
"InvalidEdition",
|
||||
"GeoIP3-City",
|
||||
"GeoLite3-Country",
|
||||
"NotAValidEdition",
|
||||
}
|
||||
|
||||
t.Run("Invalid editions", func(t *testing.T) {
|
||||
for _, edition := range invalidEditions {
|
||||
EditionIDs = edition
|
||||
err := ValidateGeoLite2DBEditions()
|
||||
assert.Error(t, err, "Edition %s should be invalid", edition)
|
||||
assert.Contains(t, err.Error(), "unknown Maxmind GeoIP2 edition name")
|
||||
}
|
||||
})
|
||||
}
|
||||
Reference in New Issue
Block a user