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|
package http
import (
"github.com/pkg/errors"
"github.com/spiral/roadrunner"
"net/http"
"strconv"
"strings"
"sync"
"time"
)
const (
// EventResponse thrown after the request been processed. See ErrorEvent as payload.
EventResponse = iota + 500
// EventError thrown on any non job error provided by road runner server.
EventError
)
// ErrorEvent represents singular http error event.
type ErrorEvent struct {
// Request contains client request, must not be stored.
Request *http.Request
// Error - associated error, if any.
Error error
// event timings
start time.Time
elapsed time.Duration
}
// Elapsed returns duration of the invocation.
func (e *ErrorEvent) Elapsed() time.Duration {
return e.elapsed
}
// ResponseEvent represents singular http response event.
type ResponseEvent struct {
// Request contains client request, must not be stored.
Request *Request
// Response contains service response.
Response *Response
// event timings
start time.Time
elapsed time.Duration
}
// Elapsed returns duration of the invocation.
func (e *ResponseEvent) Elapsed() time.Duration {
return e.elapsed
}
// Handler serves http connections to underlying PHP application using PSR-7 protocol. Context will include request headers,
// parsed files and query, payload will include parsed form dataTree (if any).
type Handler struct {
cfg *Config
rr *roadrunner.Server
mul sync.Mutex
lsn func(event int, ctx interface{})
}
// Listen attaches handler event controller.
func (h *Handler) Listen(l func(event int, ctx interface{})) {
h.mul.Lock()
defer h.mul.Unlock()
h.lsn = l
}
// mdwr serve using PSR-7 requests passed to underlying application. Attempts to serve static files first if enabled.
func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
start := time.Now()
// validating request size
if h.cfg.MaxRequestSize != 0 {
if length := r.Header.Get("content-length"); length != "" {
if size, err := strconv.ParseInt(length, 10, 64); err != nil {
h.handleError(w, r, err, start)
return
} else if size > h.cfg.MaxRequestSize*1024*1024 {
h.handleError(w, r, errors.New("request body max size is exceeded"), start)
return
}
}
}
req, err := NewRequest(r, h.cfg.Uploads)
if err != nil {
h.handleError(w, r, err, start)
return
}
// proxy IP resolution
h.resolveIP(req)
req.Open()
defer req.Close()
p, err := req.Payload()
if err != nil {
h.handleError(w, r, err, start)
return
}
rsp, err := h.rr.Exec(p)
if err != nil {
h.handleError(w, r, err, start)
return
}
resp, err := NewResponse(rsp)
if err != nil {
h.handleError(w, r, err, start)
return
}
h.handleResponse(req, resp, start)
resp.Write(w)
}
// handleError sends error.
func (h *Handler) handleError(w http.ResponseWriter, r *http.Request, err error, start time.Time) {
h.throw(EventError, &ErrorEvent{Request: r, Error: err, start: start, elapsed: time.Since(start)})
w.WriteHeader(500)
w.Write([]byte(err.Error()))
}
// handleResponse triggers response event.
func (h *Handler) handleResponse(req *Request, resp *Response, start time.Time) {
h.throw(EventResponse, &ResponseEvent{Request: req, Response: resp, start: start, elapsed: time.Since(start)})
}
// throw invokes event handler if any.
func (h *Handler) throw(event int, ctx interface{}) {
h.mul.Lock()
defer h.mul.Unlock()
if h.lsn != nil {
h.lsn(event, ctx)
}
}
// get real ip passing multiple proxy
func (h *Handler) resolveIP(r *Request) {
if !h.cfg.IsTrusted(r.RemoteAddr) {
return
}
if r.Header.Get("X-Forwarded-For") != "" {
for _, addr := range strings.Split(r.Header.Get("X-Forwarded-For"), ",") {
addr = strings.TrimSpace(addr)
if h.cfg.IsTrusted(addr) {
r.RemoteAddr = addr
}
}
return
}
if r.Header.Get("X-Real-Ip") != "" {
r.RemoteAddr = fetchIP(r.Header.Get("X-Real-Ip"))
}
}
|
