/
event_export.go
257 lines (216 loc) · 7.13 KB
/
event_export.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
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
244
245
246
247
248
249
250
251
252
253
254
255
256
257
package server
import (
"bytes"
"context"
"encoding/json"
"fmt"
"io"
"strings"
"time"
"github.com/chef/automate/api/interservice/event_feed"
"github.com/chef/automate/components/event-feed-service/pkg/feed"
"github.com/chef/automate/lib/io/chunks"
"github.com/gocarina/gocsv"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// Chosen somewhat arbitrarily to be a "good enough" value.
// See: https://github.com/chef/automate/pull/1143#discussion_r170428374
const streamBufferSize = 262144
type exportHandler func([]*feed.FeedEntry) error
type displayEvent struct {
EventType string `csv:"Event Type" json:"event_type"`
ID string `csv:"ID" json:"id"`
Task string `csv:"Task" json:"task"`
RequestorName string `csv:"Requestor Name" json:"requestor_name"`
RequestorType string `csv:"Requestor Type" json:"requestor_type"`
ChefOrganization string `csv:"Chef Organization" json:"chef_organization"`
ChefInfraServer string `csv:"Chef Infra Server" json:"chef_infra_server"`
ParentName string `csv:"Parent Name" json:"parent_name"`
ParentID string `csv:"Parent ID" json:"parent_id"`
Date time.Time `csv:"Date" json:"date"`
}
// EventExport downloading events report.
func (eventFeedServer *EventFeedServer) EventExport(request *event_feed.EventExportRequest,
stream event_feed.EventFeedService_EventExportServer) error {
var sendResult exportHandler
// Date Range
startTime, endTime, err := feed.ValidateMillisecondDateRange(request.Start, request.End)
if err != nil {
return status.Error(codes.InvalidArgument, err.Error())
}
switch request.OutputType {
case "", "json":
sendResult = jsonExport(stream)
case "csv":
sendResult = csvExport(stream)
default:
return status.Error(codes.Unauthenticated, fmt.Sprintf("%s export is not supported", request.OutputType))
}
streamCtx := stream.Context()
deadline, ok := streamCtx.Deadline()
if !ok {
deadline = time.Now().Add(5 * time.Minute)
}
ctx, cancel := context.WithDeadline(streamCtx, deadline)
defer cancel()
filters, err := feed.FormatFilters(request.Filter)
if err != nil {
return status.Errorf(codes.InvalidArgument, err.Error())
}
filters, err = filterByProjects(ctx, filters)
if err != nil {
return status.Errorf(codes.InvalidArgument, err.Error())
}
sortAsc := request.Order.String() != "desc"
entryPager := eventFeedServer.entryPager(ctx, sortAsc, filters, startTime, endTime)
for {
entries, err := entryPager()
if err != nil {
return status.Errorf(codes.Internal, err.Error())
}
err = sendResult(entries)
if err != nil {
return status.Errorf(codes.Internal, "Failed to stream events Error: %s", err.Error())
}
if len(entries) == 0 {
break
}
}
return nil
}
func entryToDisplayEvent(entry *feed.FeedEntry) displayEvent {
return displayEvent{
ID: entry.ID,
EventType: entry.ObjectName,
Task: entry.Verb,
RequestorName: entry.ActorName,
RequestorType: entry.ActorObjectType,
ChefOrganization: entry.ChefOrganization,
ChefInfraServer: entry.ChefInfraServer,
ParentName: entry.ParentName,
ParentID: entry.ParentID,
Date: entry.Published,
}
}
func jsonExport(stream event_feed.EventFeedService_EventExportServer) exportHandler {
initialRun := true
return func(entries []*feed.FeedEntry) error {
// If this is the first set of nodes to export, prepend "[" to start a JSON document.
if initialRun {
err := stream.Send(&event_feed.EventExportResponse{Content: []byte{'['}})
if err != nil {
return err
}
initialRun = false
// If this is not the first set of nodes and the collection has elements,
// prepend the "," that couldn't get added in the previous call to this function.
} else if len(entries) != 0 {
err := stream.Send(&event_feed.EventExportResponse{Content: []byte{','}})
if err != nil {
return err
}
}
// If the collection has no elements, append "]" to close the JSON document and stop.
if len(entries) == 0 {
err := stream.Send(&event_feed.EventExportResponse{Content: []byte{']'}})
if err != nil {
return err
}
return nil
}
writer := chunks.NewWriter(streamBufferSize, func(p []byte) error {
return stream.Send(&event_feed.EventExportResponse{Content: p})
})
buf := make([]byte, streamBufferSize)
for i := range entries {
raw, err := json.Marshal(entryToDisplayEvent(entries[i]))
if err != nil {
return fmt.Errorf("Failed to marshal JSON export data: %+v", err)
}
// If this is the last element of the collection passed to this function call,
// there is not enough information to know if this is the last element overall.
// So, only append "," if it can be determined that there are more elements.
if i != len(entries)-1 {
raw = append(raw, ',')
}
reader := bytes.NewReader(raw)
_, err = io.CopyBuffer(writer, reader, buf)
if err != nil {
return fmt.Errorf("Failed to export JSON: %+v", err)
}
}
return nil
}
}
func csvExport(stream event_feed.EventFeedService_EventExportServer) exportHandler {
initialRun := true
return func(entries []*feed.FeedEntry) error {
res, err := entriesToCSV(entries)
if err != nil {
return err
}
if initialRun {
initialRun = false
} else {
splits := strings.SplitAfterN(res, "\n", 2)
if len(splits) == 2 {
res = splits[1]
}
}
reader := bytes.NewReader([]byte(res))
buf := make([]byte, streamBufferSize)
writer := chunks.NewWriter(streamBufferSize, func(p []byte) error {
return stream.Send(&event_feed.EventExportResponse{Content: p})
})
_, err = io.CopyBuffer(writer, reader, buf)
if err != nil {
return fmt.Errorf("Failed to export CSV: %+v", err)
}
return nil
}
}
func entriesToCSV(entries []*feed.FeedEntry) (string, error) {
displayNodeCollection := nodeCollectionToDisplayEventCollection(entries)
// export everything
content, err := gocsv.MarshalString(&displayNodeCollection)
if err != nil {
return "", fmt.Errorf("Failed to marshal CSV report: %+v", err)
}
return content, nil
}
func nodeCollectionToDisplayEventCollection(entries []*feed.FeedEntry) []displayEvent {
var displayEntryCollection = make([]displayEvent, len(entries))
for index, entry := range entries {
displayEntryCollection[index] = entryToDisplayEvent(entry)
}
return displayEntryCollection
}
func (eventFeedServer *EventFeedServer) entryPager(ctx context.Context,
sortAsc bool, filters map[string][]string, startTime, endTime time.Time) func() ([]*feed.FeedEntry, error) {
pageSize := 100
var cursorDate time.Time
cursorID := ""
return func() ([]*feed.FeedEntry, error) {
fq := feed.FeedQuery{
Size: pageSize,
Start: startTime.UTC(),
End: endTime.UTC(),
Filters: filters,
CursorDate: cursorDate.UTC(),
CursorID: cursorID,
Ascending: sortAsc,
}
entries, _, err := eventFeedServer.feedService.store.GetFeed(&fq)
if err != nil {
return []*feed.FeedEntry{}, err
}
if len(entries) == 0 {
return []*feed.FeedEntry{}, nil
}
lastEntry := entries[len(entries)-1]
cursorID = lastEntry.ID
cursorDate = lastEntry.Published
return entries, nil
}
}