telegraf/plugins/inputs/http/http_test.go

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package http_test
import (
"compress/gzip"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
plugin "github.com/influxdata/telegraf/plugins/inputs/http"
"github.com/influxdata/telegraf/plugins/parsers"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/require"
)
func TestHTTPwithJSONFormat(t *testing.T) {
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/endpoint" {
_, _ = w.Write([]byte(simpleJSON))
} else {
w.WriteHeader(http.StatusNotFound)
}
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
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URLs: []string{url},
}
metricName := "metricName"
p, _ := parsers.NewParser(&parsers.Config{
DataFormat: "json",
MetricName: "metricName",
})
plugin.SetParser(p)
var acc testutil.Accumulator
require.NoError(t, acc.GatherError(plugin.Gather))
require.Len(t, acc.Metrics, 1)
// basic check to see if we got the right field, value and tag
var metric = acc.Metrics[0]
require.Equal(t, metric.Measurement, metricName)
require.Len(t, acc.Metrics[0].Fields, 1)
require.Equal(t, acc.Metrics[0].Fields["a"], 1.2)
require.Equal(t, acc.Metrics[0].Tags["url"], url)
}
func TestHTTPHeaders(t *testing.T) {
header := "X-Special-Header"
headerValue := "Special-Value"
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/endpoint" {
if r.Header.Get(header) == headerValue {
_, _ = w.Write([]byte(simpleJSON))
} else {
w.WriteHeader(http.StatusForbidden)
}
} else {
w.WriteHeader(http.StatusNotFound)
}
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
URLs: []string{url},
Headers: map[string]string{header: headerValue},
}
p, _ := parsers.NewParser(&parsers.Config{
DataFormat: "json",
MetricName: "metricName",
})
plugin.SetParser(p)
var acc testutil.Accumulator
require.NoError(t, acc.GatherError(plugin.Gather))
}
func TestInvalidStatusCode(t *testing.T) {
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
URLs: []string{url},
}
metricName := "metricName"
p, _ := parsers.NewParser(&parsers.Config{
DataFormat: "json",
MetricName: metricName,
})
plugin.SetParser(p)
var acc testutil.Accumulator
require.Error(t, acc.GatherError(plugin.Gather))
}
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func TestMethod(t *testing.T) {
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.Method == "POST" {
w.WriteHeader(http.StatusOK)
} else {
w.WriteHeader(http.StatusNotFound)
}
}))
defer fakeServer.Close()
plugin := &plugin.HTTP{
URLs: []string{fakeServer.URL},
Method: "POST",
}
p, _ := parsers.NewParser(&parsers.Config{
DataFormat: "json",
MetricName: "metricName",
})
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plugin.SetParser(p)
var acc testutil.Accumulator
require.NoError(t, acc.GatherError(plugin.Gather))
}
func TestParserNotSet(t *testing.T) {
fakeServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/endpoint" {
_, _ = w.Write([]byte(simpleJSON))
} else {
w.WriteHeader(http.StatusNotFound)
}
}))
defer fakeServer.Close()
url := fakeServer.URL + "/endpoint"
plugin := &plugin.HTTP{
URLs: []string{url},
}
var acc testutil.Accumulator
require.Error(t, acc.GatherError(plugin.Gather))
}
const simpleJSON = `
{
"a": 1.2
}
`
func TestBodyAndContentEncoding(t *testing.T) {
ts := httptest.NewServer(http.NotFoundHandler())
defer ts.Close()
url := fmt.Sprintf("http://%s", ts.Listener.Addr().String())
tests := []struct {
name string
plugin *plugin.HTTP
queryHandlerFunc func(t *testing.T, w http.ResponseWriter, r *http.Request)
}{
{
name: "no body",
plugin: &plugin.HTTP{
Method: "POST",
URLs: []string{url},
},
queryHandlerFunc: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
require.NoError(t, err)
require.Equal(t, []byte(""), body)
w.WriteHeader(http.StatusOK)
},
},
{
name: "post body",
plugin: &plugin.HTTP{
URLs: []string{url},
Method: "POST",
Body: "test",
},
queryHandlerFunc: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
require.NoError(t, err)
require.Equal(t, []byte("test"), body)
w.WriteHeader(http.StatusOK)
},
},
{
name: "get method body is sent",
plugin: &plugin.HTTP{
URLs: []string{url},
Method: "GET",
Body: "test",
},
queryHandlerFunc: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
body, err := ioutil.ReadAll(r.Body)
require.NoError(t, err)
require.Equal(t, []byte("test"), body)
w.WriteHeader(http.StatusOK)
},
},
{
name: "gzip encoding",
plugin: &plugin.HTTP{
URLs: []string{url},
Method: "GET",
Body: "test",
ContentEncoding: "gzip",
},
queryHandlerFunc: func(t *testing.T, w http.ResponseWriter, r *http.Request) {
require.Equal(t, r.Header.Get("Content-Encoding"), "gzip")
gr, err := gzip.NewReader(r.Body)
require.NoError(t, err)
body, err := ioutil.ReadAll(gr)
require.NoError(t, err)
require.Equal(t, []byte("test"), body)
w.WriteHeader(http.StatusOK)
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
ts.Config.Handler = http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
tt.queryHandlerFunc(t, w, r)
})
parser, err := parsers.NewParser(&parsers.Config{DataFormat: "influx"})
require.NoError(t, err)
tt.plugin.SetParser(parser)
var acc testutil.Accumulator
err = tt.plugin.Gather(&acc)
require.NoError(t, err)
})
}
}