105 lines
2.8 KiB
Go
105 lines
2.8 KiB
Go
package cbreaker
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import (
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"fmt"
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"net/http"
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"net/url"
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"strconv"
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log "github.com/sirupsen/logrus"
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"github.com/vulcand/oxy/utils"
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)
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// Response response model
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type Response struct {
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StatusCode int
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ContentType string
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Body []byte
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}
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// ResponseFallback fallback response handler
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type ResponseFallback struct {
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r Response
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log *log.Logger
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}
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// NewResponseFallbackWithLogger creates a new ResponseFallback
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func NewResponseFallbackWithLogger(r Response, l *log.Logger) (*ResponseFallback, error) {
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if r.StatusCode == 0 {
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return nil, fmt.Errorf("response code should not be 0")
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}
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return &ResponseFallback{r: r, log: l}, nil
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}
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// NewResponseFallback creates a new ResponseFallback
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func NewResponseFallback(r Response) (*ResponseFallback, error) {
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return NewResponseFallbackWithLogger(r, log.StandardLogger())
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}
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func (f *ResponseFallback) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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if f.log.Level >= log.DebugLevel {
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logEntry := f.log.WithField("Request", utils.DumpHttpRequest(req))
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logEntry.Debug("vulcand/oxy/fallback/response: begin ServeHttp on request")
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defer logEntry.Debug("vulcand/oxy/fallback/response: completed ServeHttp on request")
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}
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if f.r.ContentType != "" {
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w.Header().Set("Content-Type", f.r.ContentType)
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}
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w.Header().Set("Content-Length", strconv.Itoa(len(f.r.Body)))
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w.WriteHeader(f.r.StatusCode)
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_, err := w.Write(f.r.Body)
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if err != nil {
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log.Errorf("vulcand/oxy/fallback/response: failed to write response, err: %v", err)
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}
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}
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// Redirect redirect model
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type Redirect struct {
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URL string
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PreservePath bool
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}
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// RedirectFallback fallback redirect handler
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type RedirectFallback struct {
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r Redirect
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u *url.URL
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log *log.Logger
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}
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// NewRedirectFallbackWithLogger creates a new RedirectFallback
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func NewRedirectFallbackWithLogger(r Redirect, l *log.Logger) (*RedirectFallback, error) {
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u, err := url.ParseRequestURI(r.URL)
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if err != nil {
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return nil, err
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}
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return &RedirectFallback{r: r, u: u, log: l}, nil
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}
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// NewRedirectFallback creates a new RedirectFallback
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func NewRedirectFallback(r Redirect) (*RedirectFallback, error) {
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return NewRedirectFallbackWithLogger(r, log.StandardLogger())
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}
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func (f *RedirectFallback) ServeHTTP(w http.ResponseWriter, req *http.Request) {
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if f.log.Level >= log.DebugLevel {
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logEntry := f.log.WithField("Request", utils.DumpHttpRequest(req))
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logEntry.Debug("vulcand/oxy/fallback/redirect: begin ServeHttp on request")
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defer logEntry.Debug("vulcand/oxy/fallback/redirect: completed ServeHttp on request")
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}
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location := f.u.String()
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if f.r.PreservePath {
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location += req.URL.Path
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}
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w.Header().Set("Location", location)
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w.WriteHeader(http.StatusFound)
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_, err := w.Write([]byte(http.StatusText(http.StatusFound)))
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if err != nil {
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log.Errorf("vulcand/oxy/fallback/redirect: failed to write response, err: %v", err)
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}
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}
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