125 lines
2.6 KiB
Go
125 lines
2.6 KiB
Go
package xhttp
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import (
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"bufio"
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"errors"
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"fmt"
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"log"
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"net"
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"net/http"
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"runtime/debug"
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"time"
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"golang.org/x/text/message"
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"oss.terrastruct.com/cmdlog"
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)
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type ResponseWriter interface {
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http.ResponseWriter
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http.Hijacker
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http.Flusher
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writtenResponseWriter
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}
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var _ ResponseWriter = &responseWriter{}
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type responseWriter struct {
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rw http.ResponseWriter
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written bool
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status int
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length int
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}
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func (rw *responseWriter) Header() http.Header {
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return rw.rw.Header()
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}
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func (rw *responseWriter) WriteHeader(statusCode int) {
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if !rw.written {
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rw.written = true
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rw.status = statusCode
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}
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rw.rw.WriteHeader(statusCode)
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}
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func (rw *responseWriter) Write(p []byte) (int, error) {
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if !rw.written && len(p) > 0 {
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rw.written = true
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if rw.status == 0 {
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rw.status = http.StatusOK
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}
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}
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rw.length += len(p)
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return rw.rw.Write(p)
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}
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func (rw *responseWriter) Hijack() (net.Conn, *bufio.ReadWriter, error) {
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hj, ok := rw.rw.(http.Hijacker)
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if !ok {
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return nil, nil, fmt.Errorf("underlying response writer does not implement http.Hijacker: %T", rw.rw)
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}
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return hj.Hijack()
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}
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func (rw *responseWriter) Flush() {
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f, ok := rw.rw.(http.Flusher)
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if !ok {
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return
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}
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f.Flush()
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}
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func (rw *responseWriter) Written() bool {
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return rw.written
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}
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func Log(clog *cmdlog.Logger, next http.Handler) http.Handler {
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englishPrinter := message.NewPrinter(message.MatchLanguage("en"))
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return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
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defer func() {
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rec := recover()
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if rec != nil {
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clog.Error.Printf("caught panic: %#v\n%s", rec, debug.Stack())
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JSON(clog, w, http.StatusInternalServerError, map[string]interface{}{
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"error": http.StatusText(http.StatusInternalServerError),
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})
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}
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}()
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rw := &responseWriter{
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rw: w,
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}
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start := time.Now()
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next.ServeHTTP(rw, r)
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dur := time.Since(start)
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if !rw.Written() {
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_, err := rw.Write(nil)
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if errors.Is(err, http.ErrHijacked) {
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clog.Success.Printf("%s %s %v: hijacked", r.Method, r.URL, dur)
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return
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}
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clog.Warn.Printf("%s %s %v: no response written", r.Method, r.URL, dur)
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return
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}
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var statusLogger *log.Logger
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switch {
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case 100 <= rw.status && rw.status <= 299:
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statusLogger = clog.Success
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case 300 <= rw.status && rw.status <= 399:
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statusLogger = clog.Info
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case 400 <= rw.status && rw.status <= 499:
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statusLogger = clog.Warn
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case 500 <= rw.status && rw.status <= 599:
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statusLogger = clog.Error
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}
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lengthStr := englishPrinter.Sprint(rw.length)
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// TODO: make work with watch.go on hijack, not after
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statusLogger.Printf("%s %s %d %sB %v", r.Method, r.URL, rw.status, lengthStr, dur)
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})
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}
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