/
fast.go
113 lines (92 loc) · 2.32 KB
/
fast.go
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
package speedtester
import (
"errors"
"fmt"
"io"
"net/http"
"net/url"
"strings"
"time"
"github.com/gesquive/fast-cli/fast"
"golang.org/x/sync/errgroup"
)
const (
workload = 8
payloadSizeMB = 25.0 // download payload is by default 25MB, make upload 25MB also
)
type MeasurementFast struct {
httpClient *http.Client
}
func NewMeasurementFast() *MeasurementFast {
return &MeasurementFast{
httpClient: &http.Client{},
}
}
// Measure naively attempts to measure network speed by using fast.com's api directly
// because fast-cli and go-fast libraries provide only download speed
func (f *MeasurementFast) Measure() (*Measurement, error) {
urls := fast.GetDlUrls(1)
if len(urls) == 0 {
return nil, errors.New("no server urls available")
}
url := urls[0]
downloadSpeed, err := f.measureNetworkSpeed(download, url)
if err != nil {
fmt.Errorf("download measureNetworkSpeed fails with: %w", err)
}
uploadSpeed, err := f.measureNetworkSpeed(upload, url)
if err != nil {
fmt.Errorf("upload measureNetworkSpeed fails with: %w", err)
}
measurement := &Measurement{
Resource: Fast,
DownloadSpeed: downloadSpeed,
UploadSpeed: uploadSpeed}
return measurement, nil
}
func (f *MeasurementFast) measureNetworkSpeed(operation func(httpClient *http.Client, url string) error, url string) (float64, error) {
eg := errgroup.Group{}
sTime := time.Now()
for i := 0; i < workload; i++ {
eg.Go(func() error {
return operation(f.httpClient, url)
})
}
if err := eg.Wait(); err != nil {
return 0, err
}
fTime := time.Now()
return payloadSizeMB * 8 * float64(workload) / fTime.Sub(sTime).Seconds(), nil
}
func download(httpClient *http.Client, url string) error {
if httpClient == nil {
return errors.New("download: nil httpClient")
}
resp, err := httpClient.Get(url)
if err != nil {
return err
}
defer resp.Body.Close()
_, err = io.ReadAll(resp.Body)
if err != nil {
return err
}
return nil
}
func upload(httpClient *http.Client, uri string) error {
if httpClient == nil {
return errors.New("download: nil httpClient")
}
v := url.Values{}
v.Add("content", strings.Repeat("0123456789", payloadSizeMB*1024*1024/10))
resp, err := httpClient.PostForm(uri, v)
if err != nil {
return err
}
defer resp.Body.Close()
_, err = io.ReadAll(resp.Body)
if err != nil {
return err
}
return nil
}