forked from vmware-archive/atc
/
baggageclaim_round_tripper.go
63 lines (51 loc) · 1.49 KB
/
baggageclaim_round_tripper.go
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package transport
import (
"net/http"
"net/url"
)
type baggageclaimRoundTripper struct {
db TransportDB
workerName string
innerRoundTripper http.RoundTripper
cachedBaggageclaimURL *string
}
func NewBaggageclaimRoundTripper(workerName string, baggageclaimURL *string, db TransportDB, innerRoundTripper http.RoundTripper) http.RoundTripper {
return &baggageclaimRoundTripper{
innerRoundTripper: innerRoundTripper,
workerName: workerName,
db: db,
cachedBaggageclaimURL: baggageclaimURL,
}
}
func (c *baggageclaimRoundTripper) RoundTrip(request *http.Request) (*http.Response, error) {
if c.cachedBaggageclaimURL == nil {
savedWorker, found, err := c.db.GetWorker(c.workerName)
if err != nil {
return nil, err
}
if !found {
return nil, WorkerMissingError{WorkerName: c.workerName}
}
if savedWorker.BaggageclaimURL() == nil {
return nil, WorkerUnreachableError{
WorkerName: c.workerName,
WorkerState: string(savedWorker.State()),
}
}
c.cachedBaggageclaimURL = savedWorker.BaggageclaimURL()
}
baggageclaimURL, err := url.Parse(*c.cachedBaggageclaimURL)
if err != nil {
return nil, err
}
updatedURL := *request.URL
updatedURL.Scheme = baggageclaimURL.Scheme
updatedURL.Host = baggageclaimURL.Host
updatedRequest := *request
updatedRequest.URL = &updatedURL
response, err := c.innerRoundTripper.RoundTrip(&updatedRequest)
if err != nil {
c.cachedBaggageclaimURL = nil
}
return response, err
}