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kayzen.go
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kayzen.go
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package kayzen
import (
"encoding/json"
"fmt"
"net/http"
"text/template"
"github.com/prebid/openrtb/v19/openrtb2"
"github.com/prebid/prebid-server/adapters"
"github.com/prebid/prebid-server/config"
"github.com/prebid/prebid-server/errortypes"
"github.com/prebid/prebid-server/macros"
"github.com/prebid/prebid-server/openrtb_ext"
)
type adapter struct {
endpoint *template.Template
}
// Builder builds a new instance of the Kayzen adapter for the given bidder with the given config.
func Builder(bidderName openrtb_ext.BidderName, config config.Adapter, server config.Server) (adapters.Bidder, error) {
template, err := template.New("endpointTemplate").Parse(config.Endpoint)
if err != nil {
return nil, fmt.Errorf("unable to parse endpoint url template: %v", err)
}
bidder := &adapter{
endpoint: template,
}
return bidder, nil
}
func (a *adapter) MakeRequests(request *openrtb2.BidRequest, reqInfo *adapters.ExtraRequestInfo) (requests []*adapters.RequestData, errors []error) {
var kayzenExt *openrtb_ext.ExtKayzen
var err error
if len(request.Imp) > 0 {
kayzenExt, err = a.getImpressionExt(&(request.Imp[0]))
if err != nil {
errors = append(errors, err)
}
request.Imp[0].Ext = nil
} else {
errors = append(errors, &errortypes.BadInput{
Message: "Missing Imp Object",
})
}
if len(errors) > 0 {
return nil, errors
}
url, err := a.buildEndpointURL(kayzenExt)
if err != nil {
return nil, []error{err}
}
requestJSON, err := json.Marshal(request)
if err != nil {
return nil, []error{err}
}
headers := http.Header{}
headers.Add("Content-Type", "application/json;charset=utf-8")
headers.Add("Accept", "application/json")
return []*adapters.RequestData{{
Method: http.MethodPost,
Body: requestJSON,
Uri: url,
Headers: headers,
}}, nil
}
func (a *adapter) getImpressionExt(imp *openrtb2.Imp) (*openrtb_ext.ExtKayzen, error) {
var bidderExt adapters.ExtImpBidder
if err := json.Unmarshal(imp.Ext, &bidderExt); err != nil {
return nil, &errortypes.BadInput{
Message: "Bidder extension not provided or can't be unmarshalled",
}
}
var kayzenExt openrtb_ext.ExtKayzen
if err := json.Unmarshal(bidderExt.Bidder, &kayzenExt); err != nil {
return nil, &errortypes.BadInput{
Message: "Error while unmarshaling bidder extension",
}
}
return &kayzenExt, nil
}
func (a *adapter) buildEndpointURL(params *openrtb_ext.ExtKayzen) (string, error) {
endpointParams := macros.EndpointTemplateParams{
ZoneID: params.Zone,
AccountID: params.Exchange,
}
return macros.ResolveMacros(a.endpoint, endpointParams)
}
func (a *adapter) MakeBids(internalRequest *openrtb2.BidRequest, externalRequest *adapters.RequestData, response *adapters.ResponseData) (*adapters.BidderResponse, []error) {
if response.StatusCode == http.StatusNoContent {
return nil, nil
}
if response.StatusCode == http.StatusBadRequest {
err := &errortypes.BadInput{
Message: "Unexpected status code: 400. Bad request from publisher. Run with request.debug = 1 for more info.",
}
return nil, []error{err}
}
if response.StatusCode != http.StatusOK {
err := &errortypes.BadServerResponse{
Message: fmt.Sprintf("Unexpected status code: %d. Run with request.debug = 1 for more info.", response.StatusCode),
}
return nil, []error{err}
}
var bidResp openrtb2.BidResponse
if err := json.Unmarshal(response.Body, &bidResp); err != nil {
return nil, []error{&errortypes.BadServerResponse{
Message: "Bad Server Response",
}}
}
bidResponse := adapters.NewBidderResponseWithBidsCapacity(1)
var errs []error
for _, seatBid := range bidResp.SeatBid {
for _, bid := range seatBid.Bid {
b := &adapters.TypedBid{
Bid: &bid,
BidType: getMediaTypeForImp(bid.ImpID, internalRequest.Imp),
}
bidResponse.Bids = append(bidResponse.Bids, b)
}
}
return bidResponse, errs
}
func getMediaTypeForImp(impID string, imps []openrtb2.Imp) openrtb_ext.BidType {
for _, imp := range imps {
if imp.ID == impID {
if imp.Banner != nil {
return openrtb_ext.BidTypeBanner
} else if imp.Video != nil {
return openrtb_ext.BidTypeVideo
} else if imp.Native != nil {
return openrtb_ext.BidTypeNative
}
}
}
return openrtb_ext.BidTypeBanner
}