101 lines
2.4 KiB
Go
101 lines
2.4 KiB
Go
package main
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import (
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"fmt"
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"io"
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"log"
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"net/http"
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"sync/atomic"
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"zoraxy-firewall/zoraxy_plugin"
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)
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var breaker = newCircuitBreaker()
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// Metrics
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var (
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requestsTotal uint64
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requestsAllowed uint64
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requestsBlocked uint64
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requestsBypassed uint64
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)
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func metricsSnapshot() map[string]interface{} {
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return map[string]interface{}{
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"total": atomic.LoadUint64(&requestsTotal),
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"allowed": atomic.LoadUint64(&requestsAllowed),
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"blocked": atomic.LoadUint64(&requestsBlocked),
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"bypassed": atomic.LoadUint64(&requestsBypassed),
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"circuit": circuitStateStr(breaker.State()),
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"enabled": getConfig().Enabled,
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}
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}
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func circuitStateStr(s CircuitState) string {
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switch s {
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case StateClosed:
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return "closed"
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case StateOpen:
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return "open"
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case StateHalfOpen:
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return "half-open"
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}
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return "unknown"
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}
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// handleInspect is the static capture handler.
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func handleInspect(w http.ResponseWriter, r *http.Request) {
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atomic.AddUint64(&requestsTotal, 1)
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cfg := getConfig()
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if !cfg.Enabled {
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atomic.AddUint64(&requestsBypassed, 1)
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w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_UNHANDLED))
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return
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}
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state := breaker.State()
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if state == StateOpen {
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// WAF is down — bypass directly to backend.
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atomic.AddUint64(&requestsBypassed, 1)
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log.Printf("Firewall: breaker OPEN — bypassing %s %s", r.Method, r.URL.Path)
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bypassToBackend(w, r)
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w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_CAPTURED))
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return
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}
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// Proxy through WAF.
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resp, err := proxyThroughWAF(w, r)
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if err != nil {
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atomic.AddUint64(&requestsBypassed, 1)
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log.Printf("Firewall: WAF unreachable — bypassing %s %s: %v", r.Method, r.URL.Path, err)
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breaker.RecordFailure()
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bypassToBackend(w, r)
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w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_CAPTURED))
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return
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}
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defer resp.Body.Close()
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breaker.RecordSuccess()
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if resp.StatusCode == 403 {
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atomic.AddUint64(&requestsBlocked, 1)
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log.Printf("Firewall: BLOCKED %s %s", r.Method, r.URL.Path)
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w.Header().Set("Content-Type", "text/html")
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w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_CAPTURED))
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io.Copy(w, resp.Body)
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return
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}
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// Pass-through: copy the WAF's response back.
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atomic.AddUint64(&requestsAllowed, 1)
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for key, vals := range resp.Header {
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for _, v := range vals {
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w.Header().Add(key, v)
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}
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}
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w.WriteHeader(resp.StatusCode)
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fmt.Fprintf(w, " ") // ensure WriteHeader is sent
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io.Copy(w, resp.Body)
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w.WriteHeader(int(zoraxy_plugin.ControlStatusCode_CAPTURED))
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}
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