telegraf/plugins/inputs/http_response/http_response_test.go

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package http_response
import (
"errors"
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"fmt"
"io/ioutil"
"net"
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"net/http"
"net/http/httptest"
"testing"
"time"
"github.com/influxdata/telegraf/internal"
"github.com/influxdata/telegraf/testutil"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
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)
// Receives a list with fields that are expected to be absent
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func checkAbsentFields(t *testing.T, fields []string, acc *testutil.Accumulator) {
for _, field := range fields {
ok := acc.HasField("http_response", field)
require.False(t, ok)
}
}
// Receives a list with tags that are expected to be absent
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func checkAbsentTags(t *testing.T, tags []string, acc *testutil.Accumulator) {
for _, tag := range tags {
ok := acc.HasTag("http_response", tag)
require.False(t, ok)
}
}
// Receives a dictionary and with expected fields and their values. If a value is nil, it will only check
// that the field exists, but not its contents
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func checkFields(t *testing.T, fields map[string]interface{}, acc *testutil.Accumulator) {
for key, field := range fields {
switch v := field.(type) {
case int:
value, ok := acc.IntField("http_response", key)
require.True(t, ok)
require.Equal(t, field, value)
case float64:
value, ok := acc.FloatField("http_response", key)
require.True(t, ok)
require.Equal(t, field, value)
case string:
value, ok := acc.StringField("http_response", key)
require.True(t, ok)
require.Equal(t, field, value)
case nil:
ok := acc.HasField("http_response", key)
require.True(t, ok)
default:
t.Log("Unsupported type for field: ", v)
t.Fail()
}
}
}
// Receives a dictionary and with expected tags and their values. If a value is nil, it will only check
// that the tag exists, but not its contents
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func checkTags(t *testing.T, tags map[string]interface{}, acc *testutil.Accumulator) {
for key, tag := range tags {
switch v := tag.(type) {
case string:
ok := acc.HasTag("http_response", key)
require.True(t, ok)
require.Equal(t, tag, acc.TagValue("http_response", key))
case nil:
ok := acc.HasTag("http_response", key)
require.True(t, ok)
default:
t.Log("Unsupported type for tag: ", v)
t.Fail()
}
}
}
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func setUpTestMux() http.Handler {
mux := http.NewServeMux()
mux.HandleFunc("/redirect", func(w http.ResponseWriter, req *http.Request) {
http.Redirect(w, req, "/good", http.StatusMovedPermanently)
})
mux.HandleFunc("/good", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "hit the good page!")
})
mux.HandleFunc("/jsonresponse", func(w http.ResponseWriter, req *http.Request) {
fmt.Fprintf(w, "\"service_status\": \"up\", \"healthy\" : \"true\"")
})
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mux.HandleFunc("/badredirect", func(w http.ResponseWriter, req *http.Request) {
http.Redirect(w, req, "/badredirect", http.StatusMovedPermanently)
})
mux.HandleFunc("/mustbepostmethod", func(w http.ResponseWriter, req *http.Request) {
if req.Method != "POST" {
http.Error(w, "method wasn't post", http.StatusMethodNotAllowed)
return
}
fmt.Fprintf(w, "used post correctly!")
})
mux.HandleFunc("/musthaveabody", func(w http.ResponseWriter, req *http.Request) {
body, err := ioutil.ReadAll(req.Body)
req.Body.Close()
if err != nil {
http.Error(w, "couldn't read request body", http.StatusBadRequest)
return
}
if string(body) == "" {
http.Error(w, "body was empty", http.StatusBadRequest)
return
}
fmt.Fprintf(w, "sent a body!")
})
mux.HandleFunc("/twosecondnap", func(w http.ResponseWriter, req *http.Request) {
time.Sleep(time.Second * 2)
return
})
return mux
}
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func checkOutput(t *testing.T, acc *testutil.Accumulator, presentFields map[string]interface{}, presentTags map[string]interface{}, absentFields []string, absentTags []string) {
if presentFields != nil {
checkFields(t, presentFields, acc)
}
if presentTags != nil {
checkTags(t, presentTags, acc)
}
if absentFields != nil {
checkAbsentFields(t, absentFields, acc)
}
if absentTags != nil {
checkAbsentTags(t, absentTags, acc)
}
}
func TestHeaders(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
cHeader := r.Header.Get("Content-Type")
assert.Equal(t, "Hello", r.Host)
assert.Equal(t, "application/json", cHeader)
w.WriteHeader(http.StatusOK)
}))
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL,
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 2},
Headers: map[string]string{
"Content-Type": "application/json",
"Host": "Hello",
},
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
absentFields := []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
}
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func TestFields(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/good",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
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require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
absentFields := []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
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}
func findInterface() (net.Interface, error) {
potential, _ := net.Interfaces()
for _, i := range potential {
// we are only interest in loopback interfaces which are up
if (i.Flags&net.FlagUp == 0) || (i.Flags&net.FlagLoopback == 0) {
continue
}
if addrs, _ := i.Addrs(); len(addrs) > 0 {
// return interface if it has at least one unicast address
return i, nil
}
}
return net.Interface{}, errors.New("cannot find suitable loopback interface")
}
func TestInterface(t *testing.T) {
var (
mux = setUpTestMux()
ts = httptest.NewServer(mux)
)
defer ts.Close()
intf, err := findInterface()
require.NoError(t, err)
h := &HTTPResponse{
Address: ts.URL + "/good",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
FollowRedirects: true,
Interface: intf.Name,
}
var acc testutil.Accumulator
err = h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
absentFields := []string{"response_string_match"}
checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
}
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func TestRedirects(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/redirect",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
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require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
absentFields := []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
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h = &HTTPResponse{
Address: ts.URL + "/badredirect",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
acc = testutil.Accumulator{}
err = h.Gather(&acc)
require.NoError(t, err)
expectedFields = map[string]interface{}{
"result_type": "connection_failed",
"result_code": 3,
}
expectedTags = map[string]interface{}{
"server": nil,
"method": "GET",
"result": "connection_failed",
}
absentFields = []string{"http_response_code", "response_time", "response_string_match"}
absentTags := []string{"status_code"}
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checkOutput(t, &acc, expectedFields, expectedTags, nil, nil)
expectedFields = map[string]interface{}{"result_type": "connection_failed"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, absentTags)
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}
func TestMethod(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/mustbepostmethod",
Body: "{ 'test': 'data'}",
Method: "POST",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
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require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "POST",
"status_code": "200",
"result": "success",
}
absentFields := []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
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h = &HTTPResponse{
Address: ts.URL + "/mustbepostmethod",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
acc = testutil.Accumulator{}
err = h.Gather(&acc)
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require.NoError(t, err)
expectedFields = map[string]interface{}{
"http_response_code": http.StatusMethodNotAllowed,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags = map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "405",
"result": "success",
}
absentFields = []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
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//check that lowercase methods work correctly
h = &HTTPResponse{
Address: ts.URL + "/mustbepostmethod",
Body: "{ 'test': 'data'}",
Method: "head",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
acc = testutil.Accumulator{}
err = h.Gather(&acc)
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require.NoError(t, err)
expectedFields = map[string]interface{}{
"http_response_code": http.StatusMethodNotAllowed,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags = map[string]interface{}{
"server": nil,
"method": "head",
"status_code": "405",
"result": "success",
}
absentFields = []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
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}
func TestBody(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/musthaveabody",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
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require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
absentFields := []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
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h = &HTTPResponse{
Address: ts.URL + "/musthaveabody",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
acc = testutil.Accumulator{}
err = h.Gather(&acc)
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require.NoError(t, err)
expectedFields = map[string]interface{}{
"http_response_code": http.StatusBadRequest,
"result_type": "success",
"result_code": 0,
}
expectedTags = map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "400",
"result": "success",
}
absentFields = []string{"response_string_match"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
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}
func TestStringMatch(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/good",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseStringMatch: "hit the good page",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"response_string_match": 1,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
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checkOutput(t, &acc, expectedFields, expectedTags, nil, nil)
}
func TestStringMatchJson(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/jsonresponse",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseStringMatch: "\"service_status\": \"up\"",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"response_string_match": 1,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
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checkOutput(t, &acc, expectedFields, expectedTags, nil, nil)
}
func TestStringMatchFail(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/good",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseStringMatch: "hit the bad page",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"response_string_match": 0,
"result_type": "response_string_mismatch",
"result_code": 1,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "response_string_mismatch",
}
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checkOutput(t, &acc, expectedFields, expectedTags, nil, nil)
}
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func TestTimeout(t *testing.T) {
if testing.Short() {
t.Skip("Skipping test with sleep in short mode.")
}
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mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/twosecondnap",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second},
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"result_type": "timeout",
"result_code": 4,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"result": "timeout",
}
absentFields := []string{"http_response_code", "response_time", "content_length", "response_string_match"}
absentTags := []string{"status_code"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, absentTags)
}
func TestPluginErrors(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
// Bad regex test. Should return an error and return nothing
h := &HTTPResponse{
Address: ts.URL + "/good",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseStringMatch: "bad regex:[[",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.Error(t, err)
absentFields := []string{"http_response_code", "response_time", "content_length", "response_string_match", "result_type", "result_code"}
absentTags := []string{"status_code", "result", "server", "method"}
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checkOutput(t, &acc, nil, nil, absentFields, absentTags)
// Attempt to read empty body test
h = &HTTPResponse{
Address: ts.URL + "/redirect",
Body: "",
Method: "GET",
ResponseStringMatch: ".*",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
FollowRedirects: false,
}
acc = testutil.Accumulator{}
err = h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusMovedPermanently,
"response_string_match": 0,
"result_type": "body_read_error",
"result_code": 2,
"response_time": nil,
"content_length": nil,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "301",
"result": "body_read_error",
}
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checkOutput(t, &acc, expectedFields, expectedTags, nil, nil)
}
func TestNetworkErrors(t *testing.T) {
// DNS error
h := &HTTPResponse{
Address: "https://nonexistent.nonexistent", // Any non-resolvable URL works here
Body: "",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
FollowRedirects: false,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"result_type": "dns_error",
"result_code": 5,
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"result": "dns_error",
}
absentFields := []string{"http_response_code", "response_time", "content_length", "response_string_match"}
absentTags := []string{"status_code"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, absentTags)
// Connecton failed
h = &HTTPResponse{
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Address: "https:/nonexistent.nonexistent", // Any non-routable IP works here
Body: "",
Method: "GET",
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ResponseTimeout: internal.Duration{Duration: time.Second * 5},
FollowRedirects: false,
}
acc = testutil.Accumulator{}
err = h.Gather(&acc)
require.NoError(t, err)
expectedFields = map[string]interface{}{
"result_type": "connection_failed",
"result_code": 3,
}
expectedTags = map[string]interface{}{
"server": nil,
"method": "GET",
"result": "connection_failed",
}
absentFields = []string{"http_response_code", "response_time", "content_length", "response_string_match"}
absentTags = []string{"status_code"}
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checkOutput(t, &acc, expectedFields, expectedTags, absentFields, absentTags)
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}
func TestContentLength(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
URLs: []string{ts.URL + "/good"},
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
FollowRedirects: true,
}
var acc testutil.Accumulator
err := h.Gather(&acc)
require.NoError(t, err)
expectedFields := map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": len([]byte("hit the good page!")),
}
expectedTags := map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
absentFields := []string{"response_string_match"}
checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
h = &HTTPResponse{
URLs: []string{ts.URL + "/musthaveabody"},
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: internal.Duration{Duration: time.Second * 20},
Headers: map[string]string{
"Content-Type": "application/json",
},
FollowRedirects: true,
}
acc = testutil.Accumulator{}
err = h.Gather(&acc)
require.NoError(t, err)
expectedFields = map[string]interface{}{
"http_response_code": http.StatusOK,
"result_type": "success",
"result_code": 0,
"response_time": nil,
"content_length": len([]byte("sent a body!")),
}
expectedTags = map[string]interface{}{
"server": nil,
"method": "GET",
"status_code": "200",
"result": "success",
}
absentFields = []string{"response_string_match"}
checkOutput(t, &acc, expectedFields, expectedTags, absentFields, nil)
}