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package middleware
import (
"bufio"
"encoding/json"
"io"
"net/http"
"github.com/Sirupsen/logrus"
"github.com/docker/docker/api/server/httputils"
"github.com/docker/docker/pkg/ioutils"
"golang.org/x/net/context"
)
// DebugRequestMiddleware dumps the request to logger
func DebugRequestMiddleware(handler httputils.APIFunc) httputils.APIFunc {
return func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
logrus.Debugf("Calling %s %s", r.Method, r.RequestURI)
if r.Method != "POST" {
return handler(ctx, w, r, vars)
}
if err := httputils.CheckForJSON(r); err != nil {
return handler(ctx, w, r, vars)
}
maxBodySize := 4096 // 4KB
if r.ContentLength > int64(maxBodySize) {
return handler(ctx, w, r, vars)
}
body := r.Body
bufReader := bufio.NewReaderSize(body, maxBodySize)
r.Body = ioutils.NewReadCloserWrapper(bufReader, func() error { return body.Close() })
b, err := bufReader.Peek(maxBodySize)
if err != io.EOF {
// either there was an error reading, or the buffer is full (in which case the request is too large)
return handler(ctx, w, r, vars)
}
var postForm map[string]interface{}
if err := json.Unmarshal(b, &postForm); err == nil {
if _, exists := postForm["password"]; exists {
postForm["password"] = "*****"
}
formStr, errMarshal := json.Marshal(postForm)
if errMarshal == nil {
logrus.Debugf("form data: %s", string(formStr))
} else {
logrus.Debugf("form data: %q", postForm)
}
}
return handler(ctx, w, r, vars)
}
}
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