forked from TylerBrock/saw
-
Notifications
You must be signed in to change notification settings - Fork 0
/
blade.go
184 lines (161 loc) · 4.48 KB
/
blade.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
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
package blade
import (
"context"
"encoding/json"
"fmt"
"log"
"os"
"strings"
"time"
"github.com/TylerBrock/colorjson"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs"
"github.com/aws/aws-sdk-go-v2/service/cloudwatchlogs/types"
"github.com/fatih/color"
sawConfig "github.com/jsonw23/saw/config"
)
// A Blade is a Saw execution instance
type Blade struct {
config *sawConfig.Configuration
aws *config.Config
output *sawConfig.OutputConfiguration
cwl *cloudwatchlogs.Client
}
// NewBlade creates a new Blade with CloudWatchLogs instance from provided config
func NewBlade(
sawConfig *sawConfig.Configuration,
awsConfig *config.Config,
outputConfig *sawConfig.OutputConfiguration,
) *Blade {
// Load the Shared AWS Configuration (~/.aws/config)
cfg, err := config.LoadDefaultConfig(context.TODO())
if err != nil {
log.Fatal(err)
}
blade := Blade{}
blade.cwl = cloudwatchlogs.NewFromConfig(cfg)
blade.config = sawConfig
blade.output = outputConfig
return &blade
}
// GetLogGroups gets the log groups from AWS given the blade configuration
func (b *Blade) GetLogGroups() ([]types.LogGroup, error) {
logGroups := make([]types.LogGroup, 0)
input := b.config.DescribeLogGroupsInput()
for {
output, err := b.cwl.DescribeLogGroups(context.TODO(), input)
if err != nil {
return nil, err
}
logGroups = append(logGroups, output.LogGroups...)
input.NextToken = output.NextToken
if input.NextToken == nil {
break
}
}
return logGroups, nil
}
// GetLogStreams gets the log streams from AWS given the blade configuration
func (b *Blade) GetLogStreams() ([]types.LogStream, error) {
streams := make([]types.LogStream, 0)
input := b.config.DescribeLogStreamsInput()
for {
output, err := b.cwl.DescribeLogStreams(context.TODO(), input)
if err != nil {
return nil, err
}
streams = append(streams, output.LogStreams...)
input.NextToken = output.NextToken
if input.NextToken == nil {
break
}
}
return streams, nil
}
// GetEvents gets events from AWS given the blade configuration
func (b *Blade) GetEvents() {
formatter := b.output.Formatter()
input := b.config.FilterLogEventsInput()
for {
output, err := b.cwl.FilterLogEvents(context.TODO(), input)
if err != nil {
fmt.Println("Error", err)
os.Exit(2)
}
for _, event := range output.Events {
if b.output.Pretty {
fmt.Println(formatEvent(formatter, &event))
} else {
fmt.Println(*event.Message)
}
}
input.NextToken = output.NextToken
if input.NextToken == nil {
os.Exit(0)
}
}
}
// StreamEvents continuously prints log events to the console
func (b *Blade) StreamEvents() {
var lastSeenTime *int64
var seenEventIDs map[string]bool
formatter := b.output.Formatter()
input := b.config.FilterLogEventsInput()
clearSeenEventIds := func() {
seenEventIDs = make(map[string]bool, 0)
}
addSeenEventIDs := func(id *string) {
seenEventIDs[*id] = true
}
updateLastSeenTime := func(ts *int64) {
if lastSeenTime == nil || *ts > *lastSeenTime {
lastSeenTime = ts
clearSeenEventIds()
}
}
for {
output, err := b.cwl.FilterLogEvents(context.TODO(), input)
if err != nil {
fmt.Println("Error", err)
os.Exit(2)
}
for _, event := range output.Events {
updateLastSeenTime(event.Timestamp)
if _, seen := seenEventIDs[*event.EventId]; !seen {
var message string
if b.output.Raw {
message = *event.Message
} else {
message = formatEvent(formatter, &event)
}
message = strings.TrimRight(message, "\n")
fmt.Println(message)
addSeenEventIDs(event.EventId)
}
}
input.NextToken = output.NextToken
if input.NextToken == nil {
if lastSeenTime != nil {
input.StartTime = lastSeenTime
}
time.Sleep(1 * time.Second)
}
}
}
// formatEvent returns a CloudWatch log event as a formatted string using the provided formatter
func formatEvent(formatter *colorjson.Formatter, event *types.FilteredLogEvent) string {
red := color.New(color.FgRed).SprintFunc()
white := color.New(color.FgWhite).SprintFunc()
str := event.Message
bytes := []byte(*event.Message)
date := time.Unix(*event.Timestamp, 0)
dateStr := date.Format(time.RFC3339)
streamStr := aws.String(*event.LogStreamName)
jl := map[string]interface{}{}
if err := json.Unmarshal(bytes, &jl); err != nil {
return fmt.Sprintf("[%s] (%s) %s", red(dateStr), white(streamStr), *str)
}
output, _ := formatter.Marshal(jl)
return fmt.Sprintf("[%s] (%s) %s", red(dateStr), white(streamStr), output)
}