mirror of https://github.com/restic/restic.git
debug: support roundtripper logging also for release builds
Different from debug builds do not use the eofDetectRoundTripper if logging is disabled.
This commit is contained in:
Michael Eischer
parent
38becfc436
commit
1ed775e3a8
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@ -0,0 +1,116 @@
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package debug
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import (
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/http/httputil"
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"os"
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"github.com/restic/restic/internal/errors"
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)
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type eofDetectRoundTripper struct {
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http.RoundTripper
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}
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type eofDetectReader struct {
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eofSeen bool
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rd io.ReadCloser
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}
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func (rd *eofDetectReader) Read(p []byte) (n int, err error) {
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n, err = rd.rd.Read(p)
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if err == io.EOF {
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rd.eofSeen = true
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}
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return n, err
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}
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func (rd *eofDetectReader) Close() error {
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if !rd.eofSeen {
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buf, err := ioutil.ReadAll(rd)
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msg := fmt.Sprintf("body not drained, %d bytes not read", len(buf))
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if err != nil {
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msg += fmt.Sprintf(", error: %v", err)
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}
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if len(buf) > 0 {
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if len(buf) > 20 {
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buf = append(buf[:20], []byte("...")...)
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}
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msg += fmt.Sprintf(", body: %q", buf)
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}
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fmt.Fprintln(os.Stderr, msg)
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Log("%s: %+v", msg, errors.New("Close()"))
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}
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return rd.rd.Close()
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}
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func (tr eofDetectRoundTripper) RoundTrip(req *http.Request) (res *http.Response, err error) {
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res, err = tr.RoundTripper.RoundTrip(req)
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if res != nil && res.Body != nil {
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res.Body = &eofDetectReader{rd: res.Body}
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}
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return res, err
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}
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type loggingRoundTripper struct {
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http.RoundTripper
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}
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func redactHeader(header http.Header) map[string][]string {
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removedHeaders := make(map[string][]string)
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for _, hdr := range []string{
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"Authorization",
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"X-Auth-Token", // Swift headers
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"X-Auth-Key",
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} {
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origHeader, hasHeader := header[hdr]
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if hasHeader {
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removedHeaders[hdr] = origHeader
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header[hdr] = []string{"**redacted**"}
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}
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}
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return removedHeaders
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}
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func restoreHeader(header http.Header, origHeaders map[string][]string) {
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for hdr, val := range origHeaders {
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header[hdr] = val
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}
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}
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func (tr loggingRoundTripper) RoundTrip(req *http.Request) (res *http.Response, err error) {
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// save original auth and redact it
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origHeaders := redactHeader(req.Header)
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trace, err := httputil.DumpRequestOut(req, false)
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if err != nil {
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Log("DumpRequestOut() error: %v\n", err)
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} else {
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Log("------------ HTTP REQUEST -----------\n%s", trace)
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}
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restoreHeader(req.Header, origHeaders)
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res, err = tr.RoundTripper.RoundTrip(req)
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if err != nil {
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Log("RoundTrip() returned error: %v", err)
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}
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if res != nil {
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origHeaders := redactHeader(res.Header)
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trace, err := httputil.DumpResponse(res, false)
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restoreHeader(res.Header, origHeaders)
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if err != nil {
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Log("DumpResponse() error: %v\n", err)
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} else {
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Log("------------ HTTP RESPONSE ----------\n%s", trace)
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}
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}
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return res, err
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}
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@ -3,66 +3,7 @@
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package debug
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import (
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"fmt"
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"io"
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"io/ioutil"
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"net/http"
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"net/http/httputil"
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"os"
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"github.com/restic/restic/internal/errors"
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)
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type eofDetectRoundTripper struct {
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http.RoundTripper
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}
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type eofDetectReader struct {
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eofSeen bool
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rd io.ReadCloser
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}
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func (rd *eofDetectReader) Read(p []byte) (n int, err error) {
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n, err = rd.rd.Read(p)
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if err == io.EOF {
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rd.eofSeen = true
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}
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return n, err
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}
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func (rd *eofDetectReader) Close() error {
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if !rd.eofSeen {
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buf, err := ioutil.ReadAll(rd)
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msg := fmt.Sprintf("body not drained, %d bytes not read", len(buf))
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if err != nil {
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msg += fmt.Sprintf(", error: %v", err)
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}
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if len(buf) > 0 {
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if len(buf) > 20 {
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buf = append(buf[:20], []byte("...")...)
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}
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msg += fmt.Sprintf(", body: %q", buf)
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}
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fmt.Fprintln(os.Stderr, msg)
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Log("%s: %+v", msg, errors.New("Close()"))
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}
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return rd.rd.Close()
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}
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func (tr eofDetectRoundTripper) RoundTrip(req *http.Request) (res *http.Response, err error) {
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res, err = tr.RoundTripper.RoundTrip(req)
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if res != nil && res.Body != nil {
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res.Body = &eofDetectReader{rd: res.Body}
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}
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return res, err
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}
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type loggingRoundTripper struct {
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http.RoundTripper
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}
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import "net/http"
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// RoundTripper returns a new http.RoundTripper which logs all requests (if
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// debug is enabled). When debug is not enabled, upstream is returned.
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@ -74,57 +15,3 @@ func RoundTripper(upstream http.RoundTripper) http.RoundTripper {
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}
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return eofRoundTripper
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}
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func redactHeader(header http.Header) map[string][]string {
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removedHeaders := make(map[string][]string)
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for _, hdr := range []string{
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"Authorization",
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"X-Auth-Token", // Swift headers
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"X-Auth-Key",
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} {
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origHeader, hasHeader := header[hdr]
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if hasHeader {
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removedHeaders[hdr] = origHeader
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header[hdr] = []string{"**redacted**"}
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}
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}
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return removedHeaders
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}
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func restoreHeader(header http.Header, origHeaders map[string][]string) {
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for hdr, val := range origHeaders {
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header[hdr] = val
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}
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}
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func (tr loggingRoundTripper) RoundTrip(req *http.Request) (res *http.Response, err error) {
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// save original auth and redact it
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origHeaders := redactHeader(req.Header)
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trace, err := httputil.DumpRequestOut(req, false)
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if err != nil {
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Log("DumpRequestOut() error: %v\n", err)
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} else {
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Log("------------ HTTP REQUEST -----------\n%s", trace)
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}
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restoreHeader(req.Header, origHeaders)
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res, err = tr.RoundTripper.RoundTrip(req)
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if err != nil {
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Log("RoundTrip() returned error: %v", err)
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}
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if res != nil {
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origHeaders := redactHeader(res.Header)
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trace, err := httputil.DumpResponse(res, false)
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restoreHeader(res.Header, origHeaders)
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if err != nil {
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Log("DumpResponse() error: %v\n", err)
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} else {
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Log("------------ HTTP RESPONSE ----------\n%s", trace)
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}
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}
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return res, err
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}
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@ -8,5 +8,9 @@ import "net/http"
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// RoundTripper returns a new http.RoundTripper which logs all requests (if
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// debug is enabled). When debug is not enabled, upstream is returned.
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func RoundTripper(upstream http.RoundTripper) http.RoundTripper {
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if opts.isEnabled {
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// only use loggingRoundTripper if the debug log is configured
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return loggingRoundTripper{eofDetectRoundTripper{upstream}}
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}
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return upstream
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}
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@ -1,5 +1,3 @@
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// +build debug
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package debug
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import (
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