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|
package modules
import (
"encoding/json"
"fmt"
"log/slog"
"net/http"
"net/url"
"path/filepath"
"strings"
"git.ofmax.li/go-git-server/internal/admin"
"github.com/go-chi/chi/v5"
)
// ModuleHandler handles Go module proxy requests and go-import metadata
type ModuleHandler struct {
reposDir string
serverHost string
}
// normalizeImportPath creates a properly formatted full import path
func (h *ModuleHandler) normalizeImportPath(modulePath string) (string, error) {
if h.serverHost == "" {
return "", fmt.Errorf("serverHost cannot be empty")
}
if modulePath == "" {
return "", fmt.Errorf("modulePath cannot be empty")
}
if strings.Contains(modulePath, "..") {
return "", fmt.Errorf("modulePath cannot contain '..'")
}
// Clean the inputs
host := strings.TrimRight(h.serverHost, "/")
module := strings.Trim(modulePath, "/")
// Validate that module path doesn't contain invalid characters
if strings.ContainsAny(module, " \t\n\r") {
return "", fmt.Errorf("modulePath cannot contain whitespace characters")
}
return host + "/" + module, nil
}
// buildRepoURL creates a proper repository URL
func (h *ModuleHandler) buildRepoURL(modulePath string) (string, error) {
_, err := h.normalizeImportPath(modulePath)
if err != nil {
return "", err
}
// Use proper URL building to ensure valid URLs
repoURL := &url.URL{
Scheme: "https",
Host: h.serverHost,
Path: "/" + strings.Trim(modulePath, "/"),
}
return repoURL.String(), nil
}
// generateGoImportHTML creates the HTML response for go-import requests
func (h *ModuleHandler) generateGoImportHTML(modulePath string) (string, error) {
fullImportPath, err := h.normalizeImportPath(modulePath)
if err != nil {
return "", fmt.Errorf("failed to normalize import path: %w", err)
}
repoURL, err := h.buildRepoURL(modulePath)
if err != nil {
return "", fmt.Errorf("failed to build repository URL: %w", err)
}
return fmt.Sprintf(`<!DOCTYPE html>
<html>
<head>
<meta name="go-import" content="%s git %s">
<meta name="go-source" content="%s %s %s/tree/{/dir} %s/blob/{/dir}/{file}#L{line}">
</head>
<body>
go get %s
</body>
</html>`,
fullImportPath, repoURL,
fullImportPath, repoURL, repoURL, repoURL,
fullImportPath), nil
}
// NewModuleHandler creates a new module handler with explicit routes for known repos
func NewModuleHandler(reposDir, serverHost string, config *admin.ServerRepos) http.Handler {
handler := &ModuleHandler{
reposDir: reposDir,
serverHost: serverHost,
}
r := chi.NewRouter()
if config == nil {
slog.Warn("no server config provided, falling back to catch-all routing")
r.Get("/*", handler.handleAllRequests)
return r
}
// Register explicit routes only for repositories configured as Go modules
for _, repo := range config.Repos {
if !repo.GoModule {
slog.Debug("skipping non-Go module repo", "repo", repo.Name)
continue
}
// Use repo name as module path
modulePath := repo.Name
r.Get("/"+modulePath+"/@v/list", handler.createVersionListHandler(modulePath))
r.Get("/"+modulePath+"/@v/*", handler.createGenericVersionHandler(modulePath))
r.Get("/"+modulePath+"/@latest", handler.createLatestVersionHandler(modulePath))
r.Get("/"+modulePath, handler.createGoImportHandler(modulePath))
r.Get("/"+modulePath+"/", handler.createGoImportHandler(modulePath))
slog.Debug("registered Go module routes", "module", modulePath)
}
return r
}
// Handler creators that capture the module path
func (h *ModuleHandler) createVersionListHandler(modulePath string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
h.handleVersionListForModule(w, r, modulePath)
}
}
func (h *ModuleHandler) createLatestVersionHandler(modulePath string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
h.handleLatestVersionForModule(w, r, modulePath)
}
}
func (h *ModuleHandler) createGoImportHandler(modulePath string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
h.handleGoImportForModule(w, r, modulePath)
}
}
func (h *ModuleHandler) createGenericVersionHandler(modulePath string) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
path := r.URL.Path
if strings.HasSuffix(path, ".info") {
version := ExtractVersion(path)
h.handleVersionInfoForModule(w, r, modulePath, version)
} else if strings.HasSuffix(path, ".mod") {
version := ExtractVersion(path)
h.handleModFileForModule(w, r, modulePath, version)
} else if strings.HasSuffix(path, ".zip") {
version := ExtractVersion(path)
h.handleModuleZipForModule(w, r, modulePath, version)
} else {
http.NotFound(w, r)
}
}
}
// handleAllRequests routes to the appropriate handler based on the URL path
func (h *ModuleHandler) handleAllRequests(w http.ResponseWriter, r *http.Request) {
path := r.URL.Path
// Route to specific handlers based on path patterns
if strings.HasSuffix(path, "/@v/list") {
h.handleVersionList(w, r)
return
}
if strings.HasSuffix(path, "/@latest") {
h.handleLatestVersion(w, r)
return
}
if strings.Contains(path, "/@v/") {
if strings.HasSuffix(path, ".info") {
h.handleVersionInfo(w, r)
return
}
if strings.HasSuffix(path, ".mod") {
h.handleModFile(w, r)
return
}
if strings.HasSuffix(path, ".zip") {
h.handleModuleZip(w, r)
return
}
}
// Default to go-import handler for all other requests
h.handleGoImport(w, r)
}
// New handler methods that accept module path as parameter
func (h *ModuleHandler) handleVersionListForModule(w http.ResponseWriter, r *http.Request, modulePath string) {
repoPath := filepath.Join(h.reposDir, modulePath+".git")
versions, err := h.getVersions(repoPath)
if err != nil {
slog.Error("failed to get versions", "module", modulePath, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.WriteHeader(http.StatusOK)
for _, version := range versions {
fmt.Fprintln(w, version)
}
slog.Debug("served version list", "module", modulePath, "count", len(versions))
}
func (h *ModuleHandler) handleLatestVersionForModule(w http.ResponseWriter, r *http.Request, modulePath string) {
repoPath := filepath.Join(h.reposDir, modulePath+".git")
version, err := h.getLatestVersion(repoPath)
if err != nil {
slog.Error("failed to get latest version", "module", modulePath, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
timestamp, err := h.getVersionTimestamp(repoPath, version)
if err != nil {
slog.Error("failed to get version timestamp", "module", modulePath, "version", version, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
info := VersionInfo{
Version: version,
Time: timestamp,
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(info); err != nil {
slog.Error("failed to encode JSON response", "error", err)
}
slog.Debug("served latest version", "module", modulePath, "version", version)
}
func (h *ModuleHandler) handleVersionInfoForModule(w http.ResponseWriter, r *http.Request, modulePath, version string) {
repoPath := filepath.Join(h.reposDir, modulePath+".git")
timestamp, err := h.getVersionTimestamp(repoPath, version)
if err != nil {
slog.Error("failed to get version timestamp", "module", modulePath, "version", version, "error", err)
// Check if it's a repository access issue (500) vs version not found (404)
if strings.Contains(err.Error(), "repository does not exist") || strings.Contains(err.Error(), "failed to open repository") {
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
} else {
http.Error(w, "Not Found", http.StatusNotFound)
}
return
}
info := VersionInfo{
Version: version,
Time: timestamp,
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(info); err != nil {
slog.Error("failed to encode JSON response", "error", err)
}
slog.Debug("served version info", "module", modulePath, "version", version)
}
func (h *ModuleHandler) handleModFileForModule(w http.ResponseWriter, r *http.Request, modulePath, version string) {
repoPath := filepath.Join(h.reposDir, modulePath+".git")
modContent, err := h.getModFile(repoPath, version)
if err != nil {
slog.Error("failed to get mod file", "module", modulePath, "version", version, "error", err)
// Check if it's a repository access issue (500) vs version not found (404)
if strings.Contains(err.Error(), "repository does not exist") || strings.Contains(err.Error(), "failed to open repository") {
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
} else {
http.Error(w, "Not Found", http.StatusNotFound)
}
return
}
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.WriteHeader(http.StatusOK)
if _, err := w.Write(modContent); err != nil {
slog.Error("failed to write mod file response", "error", err)
}
slog.Debug("served mod file", "module", modulePath, "version", version)
}
func (h *ModuleHandler) handleModuleZipForModule(w http.ResponseWriter, r *http.Request, modulePath, version string) {
repoPath := filepath.Join(h.reposDir, modulePath+".git")
zipData, err := h.getModuleZip(repoPath, version)
if err != nil {
slog.Error("failed to get module zip", "module", modulePath, "version", version, "error", err)
// Check if it's a repository access issue (500) vs version not found (404)
if strings.Contains(err.Error(), "repository does not exist") || strings.Contains(err.Error(), "failed to open repository") {
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
} else {
http.Error(w, "Not Found", http.StatusNotFound)
}
return
}
w.Header().Set("Content-Type", "application/zip")
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s@%s.zip",
strings.ReplaceAll(modulePath, "/", "-"), version))
w.WriteHeader(http.StatusOK)
if _, err := w.Write(zipData); err != nil {
slog.Error("failed to write zip response", "error", err)
}
slog.Debug("served module zip", "module", modulePath, "version", version, "size", len(zipData))
}
func (h *ModuleHandler) handleGoImportForModule(w http.ResponseWriter, r *http.Request, modulePath string) {
// Only handle if go-get=1 parameter is present
if r.URL.Query().Get("go-get") != "1" {
http.NotFound(w, r)
return
}
// Generate HTML with go-import meta tag
html, err := h.generateGoImportHTML(modulePath)
if err != nil {
slog.Error("failed to generate go-import HTML", "module", modulePath, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.WriteHeader(http.StatusOK)
if _, err := w.Write([]byte(html)); err != nil {
slog.Error("failed to write go-import response", "error", err)
}
slog.Debug("served go-import", "module", modulePath)
}
// handleGoImport serves the go-import meta tag for module discovery
func (h *ModuleHandler) handleGoImport(w http.ResponseWriter, r *http.Request) {
// Only handle if go-get=1 parameter is present
if r.URL.Query().Get("go-get") != "1" {
http.NotFound(w, r)
return
}
modulePath := ExtractModulePath(r.URL.Path)
// Generate HTML with go-import meta tag
html, err := h.generateGoImportHTML(modulePath)
if err != nil {
slog.Error("failed to generate go-import HTML", "module", modulePath, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/html; charset=utf-8")
w.WriteHeader(http.StatusOK)
if _, err := w.Write([]byte(html)); err != nil {
slog.Error("failed to write go-import response", "error", err)
}
slog.Debug("served go-import", "module", modulePath)
}
// handleVersionList returns a list of available versions
func (h *ModuleHandler) handleVersionList(w http.ResponseWriter, r *http.Request) {
modulePath := ExtractModulePath(r.URL.Path)
repoPath := filepath.Join(h.reposDir, modulePath+".git")
versions, err := h.getVersions(repoPath)
if err != nil {
slog.Error("failed to get versions", "module", modulePath, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.WriteHeader(http.StatusOK)
for _, version := range versions {
fmt.Fprintln(w, version)
}
slog.Debug("served version list", "module", modulePath, "count", len(versions))
}
// handleLatestVersion returns the latest version information
func (h *ModuleHandler) handleLatestVersion(w http.ResponseWriter, r *http.Request) {
modulePath := ExtractModulePath(r.URL.Path)
repoPath := filepath.Join(h.reposDir, modulePath+".git")
version, err := h.getLatestVersion(repoPath)
if err != nil {
slog.Error("failed to get latest version", "module", modulePath, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
timestamp, err := h.getVersionTimestamp(repoPath, version)
if err != nil {
slog.Error("failed to get version timestamp", "module", modulePath, "version", version, "error", err)
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
return
}
info := VersionInfo{
Version: version,
Time: timestamp,
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(info); err != nil {
slog.Error("failed to encode JSON response", "error", err)
}
slog.Debug("served latest version", "module", modulePath, "version", version)
}
// handleVersionInfo returns version metadata
func (h *ModuleHandler) handleVersionInfo(w http.ResponseWriter, r *http.Request) {
modulePath := ExtractModulePath(r.URL.Path)
version := ExtractVersion(r.URL.Path)
repoPath := filepath.Join(h.reposDir, modulePath+".git")
timestamp, err := h.getVersionTimestamp(repoPath, version)
if err != nil {
slog.Error("failed to get version timestamp", "module", modulePath, "version", version, "error", err)
// Check if it's a repository access issue (500) vs version not found (404)
if strings.Contains(err.Error(), "repository does not exist") || strings.Contains(err.Error(), "failed to open repository") {
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
} else {
http.Error(w, "Not Found", http.StatusNotFound)
}
return
}
info := VersionInfo{
Version: version,
Time: timestamp,
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(http.StatusOK)
if err := json.NewEncoder(w).Encode(info); err != nil {
slog.Error("failed to encode JSON response", "error", err)
}
slog.Debug("served version info", "module", modulePath, "version", version)
}
// handleModFile returns the go.mod file for a specific version
func (h *ModuleHandler) handleModFile(w http.ResponseWriter, r *http.Request) {
modulePath := ExtractModulePath(r.URL.Path)
version := ExtractVersion(r.URL.Path)
repoPath := filepath.Join(h.reposDir, modulePath+".git")
modContent, err := h.getModFile(repoPath, version)
if err != nil {
slog.Error("failed to get mod file", "module", modulePath, "version", version, "error", err)
// Check if it's a repository access issue (500) vs version not found (404)
if strings.Contains(err.Error(), "repository does not exist") || strings.Contains(err.Error(), "failed to open repository") {
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
} else {
http.Error(w, "Not Found", http.StatusNotFound)
}
return
}
w.Header().Set("Content-Type", "text/plain; charset=utf-8")
w.WriteHeader(http.StatusOK)
if _, err := w.Write(modContent); err != nil {
slog.Error("failed to write mod file response", "error", err)
}
slog.Debug("served mod file", "module", modulePath, "version", version)
}
// handleModuleZip returns a zip archive of the module source
func (h *ModuleHandler) handleModuleZip(w http.ResponseWriter, r *http.Request) {
modulePath := ExtractModulePath(r.URL.Path)
version := ExtractVersion(r.URL.Path)
repoPath := filepath.Join(h.reposDir, modulePath+".git")
zipData, err := h.getModuleZip(repoPath, version)
if err != nil {
slog.Error("failed to get module zip", "module", modulePath, "version", version, "error", err)
// Check if it's a repository access issue (500) vs version not found (404)
if strings.Contains(err.Error(), "repository does not exist") || strings.Contains(err.Error(), "failed to open repository") {
http.Error(w, "Internal Server Error", http.StatusInternalServerError)
} else {
http.Error(w, "Not Found", http.StatusNotFound)
}
return
}
w.Header().Set("Content-Type", "application/zip")
w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s@%s.zip",
strings.ReplaceAll(modulePath, "/", "-"), version))
w.WriteHeader(http.StatusOK)
if _, err := w.Write(zipData); err != nil {
slog.Error("failed to write zip response", "error", err)
}
slog.Debug("served module zip", "module", modulePath, "version", version, "size", len(zipData))
}
// VersionInfo represents module version metadata
type VersionInfo struct {
Version string `json:"Version"`
Time string `json:"Time"`
}
|
