90 lines
2.5 KiB
Go
90 lines
2.5 KiB
Go
package middleware // import "github.com/docker/docker/api/server/middleware"
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import (
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"bufio"
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"context"
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"encoding/json"
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"io"
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"net/http"
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"strings"
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"github.com/docker/docker/api/server/httputils"
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"github.com/docker/docker/pkg/ioutils"
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"github.com/sirupsen/logrus"
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)
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// DebugRequestMiddleware dumps the request to logger
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func DebugRequestMiddleware(handler func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error) func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
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return func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
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logrus.Debugf("Calling %s %s", r.Method, r.RequestURI)
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if r.Method != http.MethodPost {
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return handler(ctx, w, r, vars)
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}
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if err := httputils.CheckForJSON(r); err != nil {
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return handler(ctx, w, r, vars)
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}
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maxBodySize := 4096 // 4KB
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if r.ContentLength > int64(maxBodySize) {
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return handler(ctx, w, r, vars)
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}
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body := r.Body
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bufReader := bufio.NewReaderSize(body, maxBodySize)
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r.Body = ioutils.NewReadCloserWrapper(bufReader, func() error { return body.Close() })
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b, err := bufReader.Peek(maxBodySize)
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if err != io.EOF {
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// either there was an error reading, or the buffer is full (in which case the request is too large)
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return handler(ctx, w, r, vars)
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}
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var postForm map[string]interface{}
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if err := json.Unmarshal(b, &postForm); err == nil {
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maskSecretKeys(postForm)
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formStr, errMarshal := json.Marshal(postForm)
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if errMarshal == nil {
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logrus.Debugf("form data: %s", string(formStr))
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} else {
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logrus.Debugf("form data: %q", postForm)
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}
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}
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return handler(ctx, w, r, vars)
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}
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}
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func maskSecretKeys(inp interface{}) {
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if arr, ok := inp.([]interface{}); ok {
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for _, f := range arr {
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maskSecretKeys(f)
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}
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return
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}
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if form, ok := inp.(map[string]interface{}); ok {
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scrub := []string{
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// Note: The Data field contains the base64-encoded secret in 'secret'
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// and 'config' create and update requests. Currently, no other POST
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// API endpoints use a data field, so we scrub this field unconditionally.
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// Change this handling to be conditional if a new endpoint is added
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// in future where this field should not be scrubbed.
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"data",
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"jointoken",
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"password",
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"secret",
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"signingcakey",
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"unlockkey",
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}
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loop0:
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for k, v := range form {
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for _, m := range scrub {
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if strings.EqualFold(m, k) {
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form[k] = "*****"
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continue loop0
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}
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}
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maskSecretKeys(v)
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}
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}
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}
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