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package cbreaker
import (
"net/http"
"net/url"
"strconv"
"github.com/vulcand/oxy/v2/utils"
)
// Response response model.
type Response struct {
StatusCode int
ContentType string
Body []byte
}
// ResponseFallback fallback response handler.
type ResponseFallback struct {
r Response
debug bool
log utils.Logger
}
// NewResponseFallback creates a new ResponseFallback.
func NewResponseFallback(r Response, options ...ResponseFallbackOption) (*ResponseFallback, error) {
rf := &ResponseFallback{r: r, log: &utils.NoopLogger{}}
for _, s := range options {
if err := s(rf); err != nil {
return nil, err
}
}
return rf, nil
}
func (f *ResponseFallback) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if f.debug {
dump := utils.DumpHTTPRequest(req)
f.log.Debug("vulcand/oxy/fallback/response: begin ServeHttp on request: %s", dump)
defer f.log.Debug("vulcand/oxy/fallback/response: completed ServeHttp on request: %s", dump)
}
if f.r.ContentType != "" {
w.Header().Set("Content-Type", f.r.ContentType)
}
w.Header().Set("Content-Length", strconv.Itoa(len(f.r.Body)))
w.WriteHeader(f.r.StatusCode)
_, err := w.Write(f.r.Body)
if err != nil {
f.log.Error("vulcand/oxy/fallback/response: failed to write response, err: %v", err)
}
}
// Redirect redirect model.
type Redirect struct {
URL string
PreservePath bool
}
// RedirectFallback fallback redirect handler.
type RedirectFallback struct {
r Redirect
u *url.URL
debug bool
log utils.Logger
}
// NewRedirectFallback creates a new RedirectFallback.
func NewRedirectFallback(r Redirect, options ...RedirectFallbackOption) (*RedirectFallback, error) {
u, err := url.ParseRequestURI(r.URL)
if err != nil {
return nil, err
}
rf := &RedirectFallback{r: r, u: u, log: &utils.NoopLogger{}}
for _, s := range options {
if err := s(rf); err != nil {
return nil, err
}
}
return rf, nil
}
func (f *RedirectFallback) ServeHTTP(w http.ResponseWriter, req *http.Request) {
if f.debug {
dump := utils.DumpHTTPRequest(req)
f.log.Debug("vulcand/oxy/fallback/redirect: begin ServeHttp on request: %s", dump)
defer f.log.Debug("vulcand/oxy/fallback/redirect: completed ServeHttp on request: %s", dump)
}
location := f.u.String()
if f.r.PreservePath {
location += req.URL.Path
}
w.Header().Set("Location", location)
w.WriteHeader(http.StatusFound)
_, err := w.Write([]byte(http.StatusText(http.StatusFound)))
if err != nil {
f.log.Error("vulcand/oxy/fallback/redirect: failed to write response, err: %v", err)
}
}
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