telegraf/plugins/inputs/http_response/http_response_test.go

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package http_response
import (
"fmt"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"io/ioutil"
"net/http"
"net/http/httptest"
"testing"
"time"
)
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("/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
}
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: 2,
Headers: map[string]string{
"Content-Type": "application/json",
"Host": "Hello",
},
}
fields, err := h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusOK, fields["http_response_code"])
}
assert.NotNil(t, fields["response_time"])
}
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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: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err := h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusOK, fields["http_response_code"])
}
assert.NotNil(t, fields["response_time"])
}
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: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err := h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusOK, fields["http_response_code"])
}
h = &HTTPResponse{
Address: ts.URL + "/badredirect",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err = h.HTTPGather()
require.Error(t, err)
}
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: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err := h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusOK, fields["http_response_code"])
}
h = &HTTPResponse{
Address: ts.URL + "/mustbepostmethod",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err = h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusMethodNotAllowed, fields["http_response_code"])
}
//check that lowercase methods work correctly
h = &HTTPResponse{
Address: ts.URL + "/mustbepostmethod",
Body: "{ 'test': 'data'}",
Method: "head",
ResponseTimeout: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err = h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusMethodNotAllowed, fields["http_response_code"])
}
}
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: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err := h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusOK, fields["http_response_code"])
}
h = &HTTPResponse{
Address: ts.URL + "/musthaveabody",
Method: "GET",
ResponseTimeout: 20,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
fields, err = h.HTTPGather()
require.NoError(t, err)
assert.NotEmpty(t, fields)
if assert.NotNil(t, fields["http_response_code"]) {
assert.Equal(t, http.StatusBadRequest, fields["http_response_code"])
}
}
func TestTimeout(t *testing.T) {
mux := setUpTestMux()
ts := httptest.NewServer(mux)
defer ts.Close()
h := &HTTPResponse{
Address: ts.URL + "/twosecondnap",
Body: "{ 'test': 'data'}",
Method: "GET",
ResponseTimeout: 1,
Headers: map[string]string{
"Content-Type": "application/json",
},
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FollowRedirects: true,
}
_, err := h.HTTPGather()
require.Error(t, err)
}