a53c15507f
- Add backend/libs/go-http-errors for consistent JSON errors - REST API: use writeMethodNotAllowed, writeNotFound, writeInternalError - middleware, gateway, search: use httperrors.WriteJSON - SPA: navbar with Explore/Tools/More dropdowns, initNavDropdowns() - Next.js: Navbar component with dropdowns + mobile menu Co-authored-by: Cursor <cursoragent@cursor.com>
66 lines
2.4 KiB
Go
66 lines
2.4 KiB
Go
package middleware
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import (
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"net/http"
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"strings"
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httperrors "github.com/explorer/backend/libs/go-http-errors"
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)
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// SecurityMiddleware adds security headers
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type SecurityMiddleware struct{}
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// NewSecurityMiddleware creates a new security middleware
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func NewSecurityMiddleware() *SecurityMiddleware {
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return &SecurityMiddleware{}
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}
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// AddSecurityHeaders adds security headers to responses
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func (m *SecurityMiddleware) AddSecurityHeaders(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Content Security Policy
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// unsafe-eval required by ethers.js v5 UMD from CDN (ABI decoding)
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w.Header().Set("Content-Security-Policy", "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval' https://cdn.jsdelivr.net https://unpkg.com https://cdnjs.cloudflare.com; style-src 'self' 'unsafe-inline' https://cdnjs.cloudflare.com; font-src 'self' https://cdnjs.cloudflare.com; img-src 'self' data: https:; connect-src 'self' https://explorer.d-bis.org https://rpc-http-pub.d-bis.org wss://rpc-ws-pub.d-bis.org http://192.168.11.221:8545 ws://192.168.11.221:8546;")
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// X-Frame-Options (click-jacking protection)
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w.Header().Set("X-Frame-Options", "DENY")
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// X-Content-Type-Options
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w.Header().Set("X-Content-Type-Options", "nosniff")
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// X-XSS-Protection
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w.Header().Set("X-XSS-Protection", "1; mode=block")
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// Strict-Transport-Security
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w.Header().Set("Strict-Transport-Security", "max-age=31536000; includeSubDomains")
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// Referrer-Policy
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w.Header().Set("Referrer-Policy", "strict-origin-when-cross-origin")
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// Permissions-Policy
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w.Header().Set("Permissions-Policy", "geolocation=(), microphone=(), camera=()")
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next.ServeHTTP(w, r)
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})
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}
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// BlockWriteCalls blocks contract write calls except WETH operations
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func (m *SecurityMiddleware) BlockWriteCalls(next http.Handler) http.Handler {
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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// Only apply to POST requests (write operations)
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if r.Method == http.MethodPost {
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// Check if this is a WETH operation (allowed)
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path := r.URL.Path
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if !strings.Contains(path, "weth") && !strings.Contains(path, "wrap") && !strings.Contains(path, "unwrap") {
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// Block other write operations for Track 1
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if strings.HasPrefix(path, "/api/v1/track1") {
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httperrors.WriteJSON(w, http.StatusForbidden, "FORBIDDEN", "Write operations not allowed for Track 1 (public)")
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return
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}
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}
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}
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next.ServeHTTP(w, r)
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})
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}
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