mirror of
https://github.com/adnanh/webhook.git
synced 2025-05-10 07:34:54 +00:00
105 lines
2.7 KiB
Go
105 lines
2.7 KiB
Go
package middleware
|
|
|
|
// Derived from the Goa project, MIT Licensed
|
|
// https://github.com/goadesign/goa/blob/v3/http/middleware/debug.go
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"net"
|
|
"net/http"
|
|
"net/http/httputil"
|
|
"sort"
|
|
"strings"
|
|
)
|
|
|
|
// responseDupper tees the response to a buffer and a response writer.
|
|
type responseDupper struct {
|
|
http.ResponseWriter
|
|
Buffer *bytes.Buffer
|
|
Status int
|
|
}
|
|
|
|
// Dumper returns a debug middleware which prints detailed information about
|
|
// incoming requests and outgoing responses including all headers, parameters
|
|
// and bodies.
|
|
func Dumper(w io.Writer) func(http.Handler) http.Handler {
|
|
return func(h http.Handler) http.Handler {
|
|
return http.HandlerFunc(func(rw http.ResponseWriter, r *http.Request) {
|
|
buf := &bytes.Buffer{}
|
|
// Request ID
|
|
rid := r.Context().Value(RequestIDKey)
|
|
|
|
// Dump request
|
|
|
|
bd, err := httputil.DumpRequest(r, true)
|
|
if err != nil {
|
|
buf.WriteString(fmt.Sprintf("[%s] Error dumping request for debugging: %s\n", rid, err))
|
|
}
|
|
|
|
sc := bufio.NewScanner(bytes.NewBuffer(bd))
|
|
sc.Split(bufio.ScanLines)
|
|
for sc.Scan() {
|
|
buf.WriteString(fmt.Sprintf("> [%s] ", rid))
|
|
buf.WriteString(sc.Text() + "\n")
|
|
}
|
|
|
|
w.Write(buf.Bytes())
|
|
buf.Reset()
|
|
|
|
// Dump Response
|
|
|
|
dupper := &responseDupper{ResponseWriter: rw, Buffer: &bytes.Buffer{}}
|
|
h.ServeHTTP(dupper, r)
|
|
|
|
// Response Status
|
|
buf.WriteString(fmt.Sprintf("< [%s] %d %s\n", rid, dupper.Status, http.StatusText(dupper.Status)))
|
|
|
|
// Response Headers
|
|
keys := make([]string, len(dupper.Header()))
|
|
i := 0
|
|
for k := range dupper.Header() {
|
|
keys[i] = k
|
|
i++
|
|
}
|
|
sort.Strings(keys)
|
|
for _, k := range keys {
|
|
buf.WriteString(fmt.Sprintf("< [%s] %s: %s\n", rid, k, strings.Join(dupper.Header()[k], ", ")))
|
|
}
|
|
|
|
// Response Body
|
|
if dupper.Buffer.Len() > 0 {
|
|
buf.WriteString(fmt.Sprintf("< [%s]\n", rid))
|
|
sc = bufio.NewScanner(dupper.Buffer)
|
|
sc.Split(bufio.ScanLines)
|
|
for sc.Scan() {
|
|
buf.WriteString(fmt.Sprintf("< [%s] ", rid))
|
|
buf.WriteString(sc.Text() + "\n")
|
|
}
|
|
}
|
|
w.Write(buf.Bytes())
|
|
})
|
|
}
|
|
}
|
|
|
|
// Write writes the data to the buffer and connection as part of an HTTP reply.
|
|
func (r *responseDupper) Write(b []byte) (int, error) {
|
|
r.Buffer.Write(b)
|
|
return r.ResponseWriter.Write(b)
|
|
}
|
|
|
|
// WriteHeader records the status and sends an HTTP response header with status code.
|
|
func (r *responseDupper) WriteHeader(s int) {
|
|
r.Status = s
|
|
r.ResponseWriter.WriteHeader(s)
|
|
}
|
|
|
|
// Hijack supports the http.Hijacker interface.
|
|
func (r *responseDupper) Hijack() (net.Conn, *bufio.ReadWriter, error) {
|
|
if hijacker, ok := r.ResponseWriter.(http.Hijacker); ok {
|
|
return hijacker.Hijack()
|
|
}
|
|
return nil, nil, fmt.Errorf("dumper middleware: inner ResponseWriter cannot be hijacked: %T", r.ResponseWriter)
|
|
}
|