forked from vmware-archive/atc
/
hijackable_client.go
57 lines (46 loc) · 1.36 KB
/
hijackable_client.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
package transport
import (
"net/http"
"github.com/concourse/retryhttp"
)
type hijackableClient struct {
db TransportDB
workerName string
innerHijackableClient retryhttp.HijackableClient
cachedHost *string
}
func NewHijackableClient(workerName string, db TransportDB, innerHijackableClient retryhttp.HijackableClient) retryhttp.HijackableClient {
return &hijackableClient{
innerHijackableClient: innerHijackableClient,
workerName: workerName,
db: db,
cachedHost: nil,
}
}
func (c *hijackableClient) Do(request *http.Request) (*http.Response, retryhttp.HijackCloser, error) {
if c.cachedHost == nil {
savedWorker, found, err := c.db.GetWorker(c.workerName)
if err != nil {
return nil, nil, err
}
if !found {
return nil, nil, WorkerMissingError{WorkerName: c.workerName}
}
if savedWorker.GardenAddr() == nil {
return nil, nil, WorkerUnreachableError{
WorkerName: c.workerName,
WorkerState: string(savedWorker.State()),
}
}
c.cachedHost = savedWorker.GardenAddr()
}
updatedURL := *request.URL
updatedURL.Host = *c.cachedHost
updatedRequest := *request
updatedRequest.URL = &updatedURL
response, hijackCloser, err := c.innerHijackableClient.Do(&updatedRequest)
if err != nil {
c.cachedHost = nil
}
return response, hijackCloser, err
}