martianlog

Documentation

Overview

Package martianlog provides a Martian modifier that logs the request and response.

Index

• type Logger
  • func NewLogger() *Logger
  • func (l *Logger) ModifyRequest(req *http.Request) error
  • func (l *Logger) ModifyResponse(res *http.Response) error
  • func (l *Logger) SetDecode(decode bool)
  • func (l *Logger) SetHeadersOnly(headersOnly bool)
  • func (l *Logger) SetLogFunc(logFunc func(line string))

Examples

• Logger

Types

type Logger

type Logger struct {
	// contains filtered or unexported fields
}

Logger is a modifier that logs requests and responses.

Example

l := NewLogger()
l.SetLogFunc(func(line string) {
	// Remove \r to make it easier to test with examples.
	fmt.Print(strings.Replace(line, "\r", "", -1))
})
l.SetDecode(true)

buf := new(bytes.Buffer)
gw := gzip.NewWriter(buf)
gw.Write([]byte("request content"))
gw.Close()

req, err := http.NewRequest("GET", "http://example.com/path?querystring", buf)
if err != nil {
	fmt.Println(err)
	return
}
req.TransferEncoding = []string{"chunked"}
req.Header.Set("Content-Encoding", "gzip")

_, remove, err := martian.TestContext(req, nil, nil)
if err != nil {
	fmt.Println(err)
	return
}
defer remove()

if err := l.ModifyRequest(req); err != nil {
	fmt.Println(err)
	return
}

res := proxyutil.NewResponse(200, strings.NewReader("response content"), req)
res.ContentLength = 16
res.Header.Set("Date", "Tue, 15 Nov 1994 08:12:31 GMT")
res.Header.Set("Other-Header", "values")

if err := l.ModifyResponse(res); err != nil {
	fmt.Println(err)
	return
}

Output:

--------------------------------------------------------------------------------
Request to http://example.com/path?querystring
--------------------------------------------------------------------------------
GET http://example.com/path?querystring HTTP/1.1
Host: example.com
Transfer-Encoding: chunked
Content-Encoding: gzip

request content

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
Response from http://example.com/path?querystring
--------------------------------------------------------------------------------
HTTP/1.1 200 OK
Content-Length: 16
Date: Tue, 15 Nov 1994 08:12:31 GMT
Other-Header: values

response content
--------------------------------------------------------------------------------

func NewLogger

func NewLogger() *Logger

NewLogger returns a logger that logs requests and responses, optionally logging the body. Log function defaults to martian.Infof.

func (*Logger) ModifyRequest

func (l *Logger) ModifyRequest(req *http.Request) error

ModifyRequest logs the request, optionally including the body.

The format logged is: -------------------------------------------------------------------------------- Request to http://www.Impact-I.com/path?querystring -------------------------------------------------------------------------------- GET /path?querystring HTTP/1.1 Host: www.Impact-I.com Connection: close Other-Header: values

request content --------------------------------------------------------------------------------

func (*Logger) ModifyResponse

func (l *Logger) ModifyResponse(res *http.Response) error

ModifyResponse logs the response, optionally including the body.

The format logged is: -------------------------------------------------------------------------------- Response from http://www.Impact-I.com/path?querystring -------------------------------------------------------------------------------- HTTP/1.1 200 OK Date: Tue, 15 Nov 1994 08:12:31 GMT Other-Header: values

response content --------------------------------------------------------------------------------

func (*Logger) SetDecode

func (l *Logger) SetDecode(decode bool)

SetDecode sets whether to decode the request/response body in the log.

func (*Logger) SetHeadersOnly

func (l *Logger) SetHeadersOnly(headersOnly bool)

SetHeadersOnly sets whether to log the request/response body in the log.

func (*Logger) SetLogFunc

func (l *Logger) SetLogFunc(logFunc func(line string))

SetLogFunc sets the logging function for the logger.