1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
package metrics
import (
"bytes"
"compress/gzip"
"context"
"io"
"net/http"
"net/http/httptest"
"sync"
"testing"
"time"
)
func TestAddExtraLabels(t *testing.T) {
f := func(s, extraLabels, expectedResult string) {
t.Helper()
result := addExtraLabels(nil, []byte(s), extraLabels)
if string(result) != expectedResult {
t.Fatalf("unexpected result; got\n%s\nwant\n%s", result, expectedResult)
}
}
f("", `foo="bar"`, "")
f("a 123", `foo="bar"`, `a{foo="bar"} 123`+"\n")
f(`a{b="c"} 1.3`, `foo="bar"`, `a{foo="bar",b="c"} 1.3`+"\n")
f(`a{b="c}{"} 1.3`, `foo="bar",baz="x"`, `a{foo="bar",baz="x",b="c}{"} 1.3`+"\n")
f(`foo 1
bar{a="x"} 2
`, `foo="bar"`, `foo{foo="bar"} 1
bar{foo="bar",a="x"} 2
`)
f(`
foo 1
# some counter
# type foobar counter
foobar{a="b",c="d"} 4`, `x="y"`, `foo{x="y"} 1
# some counter
# type foobar counter
foobar{x="y",a="b",c="d"} 4
`)
}
func TestInitPushFailure(t *testing.T) {
f := func(pushURL string, interval time.Duration, extraLabels string) {
t.Helper()
if err := InitPush(pushURL, interval, extraLabels, false); err == nil {
t.Fatalf("expecting non-nil error")
}
}
// Invalid url
f("foobar", time.Second, "")
f("aaa://foobar", time.Second, "")
f("http:///bar", time.Second, "")
// Non-positive interval
f("http://foobar", 0, "")
f("http://foobar", -time.Second, "")
// Invalid extraLabels
f("http://foobar", time.Second, "foo")
f("http://foobar", time.Second, "foo{bar")
f("http://foobar", time.Second, "foo=bar")
f("http://foobar", time.Second, "foo='bar'")
f("http://foobar", time.Second, `foo="bar",baz`)
f("http://foobar", time.Second, `{foo="bar"}`)
f("http://foobar", time.Second, `a{foo="bar"}`)
}
func TestInitPushWithOptions(t *testing.T) {
f := func(s *Set, opts *PushOptions, expectedHeaders, expectedData string) {
t.Helper()
var reqHeaders []byte
var reqData []byte
var reqErr error
doneCh := make(chan struct{})
firstRequest := true
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if firstRequest {
var bb bytes.Buffer
r.Header.WriteSubset(&bb, map[string]bool{
"Accept-Encoding": true,
"Content-Length": true,
"User-Agent": true,
})
reqHeaders = bb.Bytes()
reqData, reqErr = io.ReadAll(r.Body)
close(doneCh)
firstRequest = false
}
}))
defer srv.Close()
ctx, cancel := context.WithCancel(context.Background())
var wg sync.WaitGroup
if opts != nil {
opts.WaitGroup = &wg
}
if err := s.InitPushWithOptions(ctx, srv.URL, time.Millisecond, opts); err != nil {
t.Fatalf("unexpected error: %s", err)
}
select {
case <-time.After(5 * time.Second):
t.Fatalf("timeout!")
case <-doneCh:
// stop the periodic pusher
cancel()
wg.Wait()
}
if reqErr != nil {
t.Fatalf("unexpected error: %s", reqErr)
}
if opts == nil || !opts.DisableCompression {
zr, err := gzip.NewReader(bytes.NewBuffer(reqData))
if err != nil {
t.Fatalf("cannot initialize gzip reader: %s", err)
}
data, err := io.ReadAll(zr)
if err != nil {
t.Fatalf("cannot read data from gzip reader: %s", err)
}
if err := zr.Close(); err != nil {
t.Fatalf("unexpected error when closing gzip reader: %s", err)
}
reqData = data
}
if string(reqHeaders) != expectedHeaders {
t.Fatalf("unexpected request headers; got\n%s\nwant\n%s", reqHeaders, expectedHeaders)
}
if string(reqData) != expectedData {
t.Fatalf("unexpected data; got\n%s\nwant\n%s", reqData, expectedData)
}
}
s := NewSet()
c := s.NewCounter("foo")
c.Set(1234)
_ = s.NewGauge("bar", func() float64 {
return 42.12
})
// nil PushOptions
f(s, nil, "Content-Encoding: gzip\r\nContent-Type: text/plain\r\n", "bar 42.12\nfoo 1234\n")
// Disable compression on the pushed request body
f(s, &PushOptions{
DisableCompression: true,
}, "Content-Type: text/plain\r\n", "bar 42.12\nfoo 1234\n")
// Add extra labels
f(s, &PushOptions{
ExtraLabels: `label1="value1",label2="value2"`,
}, "Content-Encoding: gzip\r\nContent-Type: text/plain\r\n", `bar{label1="value1",label2="value2"} 42.12`+"\n"+`foo{label1="value1",label2="value2"} 1234`+"\n")
// Add extra headers
f(s, &PushOptions{
Headers: []string{"Foo: Bar", "baz:aaaa-bbb"},
}, "Baz: aaaa-bbb\r\nContent-Encoding: gzip\r\nContent-Type: text/plain\r\nFoo: Bar\r\n", "bar 42.12\nfoo 1234\n")
}
func TestPushMetrics(t *testing.T) {
f := func(s *Set, opts *PushOptions, expectedHeaders, expectedData string) {
t.Helper()
var reqHeaders []byte
var reqData []byte
var reqErr error
doneCh := make(chan struct{})
firstRequest := true
srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if firstRequest {
var bb bytes.Buffer
r.Header.WriteSubset(&bb, map[string]bool{
"Accept-Encoding": true,
"Content-Length": true,
"User-Agent": true,
})
reqHeaders = bb.Bytes()
reqData, reqErr = io.ReadAll(r.Body)
close(doneCh)
firstRequest = false
}
}))
defer srv.Close()
ctx := context.Background()
if err := s.PushMetrics(ctx, srv.URL, opts); err != nil {
t.Fatalf("unexpected error: %s", err)
}
select {
case <-time.After(5 * time.Second):
t.Fatalf("timeout!")
case <-doneCh:
}
if reqErr != nil {
t.Fatalf("unexpected error: %s", reqErr)
}
if opts == nil || !opts.DisableCompression {
zr, err := gzip.NewReader(bytes.NewBuffer(reqData))
if err != nil {
t.Fatalf("cannot initialize gzip reader: %s", err)
}
data, err := io.ReadAll(zr)
if err != nil {
t.Fatalf("cannot read data from gzip reader: %s", err)
}
if err := zr.Close(); err != nil {
t.Fatalf("unexpected error when closing gzip reader: %s", err)
}
reqData = data
}
if string(reqHeaders) != expectedHeaders {
t.Fatalf("unexpected request headers; got\n%s\nwant\n%s", reqHeaders, expectedHeaders)
}
if string(reqData) != expectedData {
t.Fatalf("unexpected data; got\n%s\nwant\n%s", reqData, expectedData)
}
}
s := NewSet()
c := s.NewCounter("foo")
c.Set(1234)
_ = s.NewGauge("bar", func() float64 {
return 42.12
})
// nil PushOptions
f(s, nil, "Content-Encoding: gzip\r\nContent-Type: text/plain\r\n", "bar 42.12\nfoo 1234\n")
// Disable compression on the pushed request body
f(s, &PushOptions{
DisableCompression: true,
}, "Content-Type: text/plain\r\n", "bar 42.12\nfoo 1234\n")
// Add extra labels
f(s, &PushOptions{
ExtraLabels: `label1="value1",label2="value2"`,
}, "Content-Encoding: gzip\r\nContent-Type: text/plain\r\n", `bar{label1="value1",label2="value2"} 42.12`+"\n"+`foo{label1="value1",label2="value2"} 1234`+"\n")
// Add extra headers
f(s, &PushOptions{
Headers: []string{"Foo: Bar", "baz:aaaa-bbb"},
}, "Baz: aaaa-bbb\r\nContent-Encoding: gzip\r\nContent-Type: text/plain\r\nFoo: Bar\r\n", "bar 42.12\nfoo 1234\n")
}
|
