func TestHttpMetricUpdate(t *testing.T) {
hmr := NewHttpMetricReporter()
// add datapoint
hm := &HttpMetric{gogrinder.Meta{"01_tc", "01_01_ts", 0, 0, gogrinder.Timestamp(time.Now()),
gogrinder.Elapsed(600 * time.Millisecond), "something is wrong!"},
gogrinder.Elapsed(500 * time.Millisecond), 10240, http.StatusOK}
hmr.Update(hm)
// check that datapoint was reported
if exp, got := 600.0, readSummaryVec(hmr.elapsed,
prometheus.Labels{"teststep": "01_01_ts"})[0].GetValue(); exp != got {
t.Errorf("Expected elapsed %d, got %d.", exp, got)
}
if exp, got := 500.0, readSummaryVec(hmr.firstByte,
prometheus.Labels{"teststep": "01_01_ts"})[0].GetValue(); exp != got {
t.Errorf("Expected firstByte %d, got %d.", exp, got)
}
if exp, got := 10.0, readSummaryVec(hmr.bytes,
prometheus.Labels{"teststep": "01_01_ts"})[0].GetValue(); exp != got {
t.Errorf("Expected kb %d, got %d.", exp, got)
}
if exp, got := 1.0, readCounterVec(hmr.error,
prometheus.Labels{"teststep": "01_01_ts"}); exp != got {
t.Errorf("Expected error counter %f, got %f.", exp, got)
}
if exp, got := 1.0, readCounterVec(hmr.code,
prometheus.Labels{"teststep": "01_01_ts", "code": "200"}); exp != got {
t.Errorf("Expected code counter %f, got %f.", exp, got)
}
}
func (fb *metricReader) Read(p []byte) (n int, err error) {
if fb.firstByteAfter == gogrinder.Elapsed(0) {
fb.readFrom.ReadByte()
fb.firstByteAfter = gogrinder.Elapsed(time.Now().Sub(fb.start))
fb.readFrom.UnreadByte()
}
n, err = fb.readFrom.Read(p)
fb.bytes += n
return
}
// RAW
func DoRaw(c *http.Client, r *http.Request, m *gogrinder.Meta) ([]byte, http.Header, *HttpMetric) {
hm := &HttpMetric{*m, gogrinder.Elapsed(0), 0, 421} // http status Misdirected Request
resp, err := c.Do(r)
if err != nil {
hm.Error += err.Error()
}
if resp != nil {
defer resp.Body.Close()
mr := newMetricReader(resp.Body)
// read the response body
raw, err := ioutil.ReadAll(mr)
if err != nil {
hm.Error += err.Error()
}
hm.FirstByte = mr.firstByteAfter
hm.Bytes = mr.bytes
hm.Code = resp.StatusCode
return raw, resp.Header, hm
}
return nil, nil, hm
}
func TestFirstByteAfterReader(t *testing.T) {
time.Freeze(time.Now())
defer time.Unfreeze()
tr := testReader{}
fbr := newMetricReader(tr)
b1 := make([]byte, 4)
fbr.Read(b1)
body := string(b1)
if !(body == "mark") {
t.Fatalf("Read buffer was expected '%s', but was: '%v'", "mark", body)
}
if fbr.firstByteAfter != gogrinder.Elapsed(55*time.Millisecond) {
t.Fatalf("First byte was expected after 55 ms but was: %v", fbr.firstByteAfter)
}
// read a second time
b2 := make([]byte, 4)
fbr.Read(b2)
body = string(b2)
if body != "fink" {
t.Fatalf("Read buffer was expected '%s', but was: '%v'", "fink", body)
}
}
// JSON
func DoJson(c *http.Client, r *http.Request, m *gogrinder.Meta) (map[string]interface{}, http.Header, *HttpMetric) {
hm := &HttpMetric{*m, gogrinder.Elapsed(0), 0, 421} // http status Misdirected Request
resp, err := c.Do(r)
if err != nil {
hm.Error += err.Error()
}
if resp != nil {
defer resp.Body.Close()
mr := newMetricReader(resp.Body)
// read the response body and parse as json
raw, err := ioutil.ReadAll(mr)
if err != nil {
m.Error += err.Error()
}
doc := make(map[string]interface{})
if len(raw) > 0 {
if raw[0] == '[' {
// a REST service response to be an array does not seem to be a good idea:
// http://stackoverflow.com/questions/12293979/how-do-i-return-a-json-array-with-bottle
// many applications do this anyway...
// so for now we need a workaround:
var array []interface{}
err = json.Unmarshal(raw, &array)
doc["data"] = array
} else {
err = json.Unmarshal(raw, &doc)
}
if err != nil {
m.Error += err.Error()
}
}
hm.FirstByte = mr.firstByteAfter
hm.Bytes = mr.bytes
hm.Code = resp.StatusCode
return doc, resp.Header, hm
}
return nil, nil, hm
}
// DOC
func Do(c *http.Client, r *http.Request, m *gogrinder.Meta) (*goquery.Document, http.Header, *HttpMetric) {
hm := &HttpMetric{*m, gogrinder.Elapsed(0), 0, 421} // http status Misdirected Request
resp, err := c.Do(r)
if err != nil {
hm.Error += err.Error()
}
if resp != nil {
defer resp.Body.Close()
mr := newMetricReader(resp.Body)
// read the response body and parse into document
doc, err := goquery.NewDocumentFromReader(mr)
if err != nil {
m.Error += err.Error()
}
hm.FirstByte = mr.firstByteAfter
hm.Bytes = mr.bytes
hm.Code = resp.StatusCode
return doc, resp.Header, hm
}
return nil, nil, hm
}
func newMetricReader(readFrom io.Reader) *metricReader {
// wrap into buffered reader
return &metricReader{0, time.Now(), gogrinder.Elapsed(0), bufio.NewReader(readFrom)}
}