New Adapter: UNICORN (prebid#1719)

* add bidder-info, bidder-params for UNICORN

* Add adapter

adapters/unicorn/params_test.go

@@ -0,0 +1,61 @@
+package unicorn
+
+import (
+	"encoding/json"
+	"testing"
+
+	"github.com/prebid/prebid-server/openrtb_ext"
+)
+
+func TestValidParams(t *testing.T) {
+	validator, err := openrtb_ext.NewBidderParamsValidator("../../static/bidder-params")
+	if err != nil {
+		t.Fatalf("Failed to fetch the json schema. %v", err)
+	}
+
+	for _, p := range validParams {
+		if err := validator.Validate(openrtb_ext.BidderUnicorn, json.RawMessage(p)); err != nil {
+			t.Errorf("Schema rejected valid params: %s", p)
+		}
+	}
+}
+
+func TestInvalidParams(t *testing.T) {
+	validator, err := openrtb_ext.NewBidderParamsValidator("../../static/bidder-params")
+	if err != nil {
+		t.Fatalf("Failed to fetch the json schema. %v", err)
+	}
+
+	for _, p := range invalidParams {
+		if err := validator.Validate(openrtb_ext.BidderUnicorn, json.RawMessage(p)); err == nil {
+			t.Errorf("Schema allowed invalid params: %s", p)
+		}
+	}
+}
+
+var validParams = []string{
+	`{
+      "accountId": 199578,
+      "publisherId": 123456,
+      "mediaId": "test_media",
+      "placementId": "test_placement"
+   }`,
+	`{
+      "accountId": 199578,
+      "mediaId": "test_media"
+   }`,
+}
+
+var invalidParams = []string{
+	`{}`,
+	`{
+      "accountId": "199578",
+      "publisherId": "123456",
+      "mediaId": 12345,
+      "placementId": 12345
+   }`,
+	`{
+      "publisherId": 123456,
+      "placementId": "test_placement"
+   }`,
+}

adapters/unicorn/unicorn.go

@@ -0,0 +1,244 @@
+package unicorn
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+
+	"github.com/buger/jsonparser"
+	"github.com/mxmCherry/openrtb"
+	"github.com/prebid/prebid-server/adapters"
+	"github.com/prebid/prebid-server/config"
+	"github.com/prebid/prebid-server/errortypes"
+	"github.com/prebid/prebid-server/openrtb_ext"
+)
+
+type adapter struct {
+	endpoint string
+}
+
+// unicornImpExt is imp ext for UNICORN
+type unicornImpExt struct {
+	Context *unicornImpExtContext     `json:"context,omitempty"`
+	Bidder  openrtb_ext.ExtImpUnicorn `json:"bidder"`
+}
+
+type unicornImpExtContext struct {
+	Data interface{} `json:"data,omitempty"`
+}
+
+// unicornExt is ext for UNICORN
+type unicornExt struct {
+	Prebid    *openrtb_ext.ExtImpPrebid `json:"prebid,omitempty"`
+	AccountID int64                     `json:"accountId,omitempty"`
+}
+
+// Builder builds a new instance of the UNICORN adapter for the given bidder with the given config.
+func Builder(bidderName openrtb_ext.BidderName, config config.Adapter) (adapters.Bidder, error) {
+	bidder := &adapter{
+		endpoint: config.Endpoint,
+	}
+	return bidder, nil
+}
+
+// MakeRequests makes the HTTP requests which should be made to fetch bids.
+func (a *adapter) MakeRequests(request *openrtb.BidRequest, requestInfo *adapters.ExtraRequestInfo) ([]*adapters.RequestData, []error) {
+	var extRegs openrtb_ext.ExtRegs
+	if request.Regs != nil {
+		if request.Regs.COPPA == 1 {
+			return nil, []error{&errortypes.BadInput{
+				Message: "COPPA is not supported",
+			}}
+		}
+		if err := json.Unmarshal(request.Regs.Ext, &extRegs); err == nil {
+			if extRegs.GDPR != nil && (*extRegs.GDPR == 1) {
+				return nil, []error{&errortypes.BadInput{
+					Message: "GDPR is not supported",
+				}}
+			}
+			if extRegs.USPrivacy != "" {
+				return nil, []error{&errortypes.BadInput{
+					Message: "CCPA is not supported",
+				}}
+			}
+		}
+	}
+
+	err := modifyImps(request)
+	if err != nil {
+		return nil, []error{err}
+	}
+
+	var modifiableSource openrtb.Source
+	if request.Source != nil {
+		modifiableSource = *request.Source
+	} else {
+		modifiableSource = openrtb.Source{}
+	}
+	modifiableSource.Ext = setSourceExt()
+	request.Source = &modifiableSource
+
+	request.Ext, err = setExt(request)
+	if err != nil {
+		return nil, []error{err}
+	}
+
+	requestJSON, err := json.Marshal(request)
+	if err != nil {
+		return nil, []error{err}
+	}
+
+	requestData := &adapters.RequestData{
+		Method:  "POST",
+		Uri:     a.endpoint,
+		Body:    requestJSON,
+		Headers: getHeaders(request),
+	}
+
+	return []*adapters.RequestData{requestData}, nil
+}
+
+func getHeaders(request *openrtb.BidRequest) http.Header {
+	headers := http.Header{}
+	headers.Add("Content-Type", "application/json;charset=utf-8")
+	headers.Add("Accept", "application/json")
+	headers.Add("X-Openrtb-Version", "2.5")
+
+	if request.Device != nil {
+		if len(request.Device.UA) > 0 {
+			headers.Add("User-Agent", request.Device.UA)
+		}
+
+		if len(request.Device.IPv6) > 0 {
+			headers.Add("X-Forwarded-For", request.Device.IPv6)
+		}
+
+		if len(request.Device.IP) > 0 {
+			headers.Add("X-Forwarded-For", request.Device.IP)
+		}
+	}
+
+	return headers
+}
+
+func modifyImps(request *openrtb.BidRequest) error {
+	for i := 0; i < len(request.Imp); i++ {
+		imp := &request.Imp[i]
+
+		var ext unicornImpExt
+		err := json.Unmarshal(imp.Ext, &ext)
+
+		if err != nil {
+			return &errortypes.BadInput{
+				Message: fmt.Sprintf("Error while decoding imp[%d].ext: %s", i, err),
+			}
+		}
+
+		if ext.Bidder.PlacementID == "" {
+			ext.Bidder.PlacementID, err = getStoredRequestImpID(imp)
+			if err != nil {
+				return &errortypes.BadInput{
+					Message: fmt.Sprintf("Error get StoredRequestImpID from imp[%d]: %s", i, err),
+				}
+			}
+		}
+
+		imp.Ext, err = json.Marshal(ext)
+		if err != nil {
+			return &errortypes.BadInput{
+				Message: fmt.Sprintf("Error while encoding imp[%d].ext: %s", i, err),
+			}
+		}
+
+		secure := int8(1)
+		imp.Secure = &secure
+		imp.TagID = ext.Bidder.PlacementID
+	}
+	return nil
+}
+
+func getStoredRequestImpID(imp *openrtb.Imp) (string, error) {
+	v, err := jsonparser.GetString(imp.Ext, "prebid", "storedrequest", "id")
+
+	if err != nil {
+		return "", fmt.Errorf("stored request id not found: %s", err)
+	}
+
+	return v, nil
+}
+
+func setSourceExt() json.RawMessage {
+	return json.RawMessage(`{"stype": "prebid_server_uncn", "bidder": "unicorn"}`)
+}
+
+func setExt(request *openrtb.BidRequest) (json.RawMessage, error) {
+	accountID, err := jsonparser.GetInt(request.Imp[0].Ext, "bidder", "accountId")
+	if err != nil {
+		accountID = 0
+	}
+	var decodedExt *unicornExt
+	err = json.Unmarshal(request.Ext, &decodedExt)
+	if err != nil {
+		decodedExt = &unicornExt{
+			Prebid: nil,
+		}
+	}
+	decodedExt.AccountID = accountID
+
+	ext, err := json.Marshal(decodedExt)
+	if err != nil {
+		return nil, &errortypes.BadInput{
+			Message: fmt.Sprintf("Error while encoding ext, err: %s", err),
+		}
+	}
+	return ext, nil
+}
+
+// MakeBids unpacks the server's response into Bids.
+func (a *adapter) MakeBids(request *openrtb.BidRequest, requestData *adapters.RequestData, responseData *adapters.ResponseData) (*adapters.BidderResponse, []error) {
+
+	if responseData.StatusCode == http.StatusNoContent {
+		return nil, nil
+	}
+
+	if responseData.StatusCode == http.StatusBadRequest {
+		err := &errortypes.BadInput{
+			Message: "Unexpected http status code: 400",
+		}
+		return nil, []error{err}
+	}
+
+	if responseData.StatusCode != http.StatusOK {
+		err := &errortypes.BadServerResponse{
+			Message: fmt.Sprintf("Unexpected http status code: %d", responseData.StatusCode),
+		}
+		return nil, []error{err}
+	}
+
+	var response openrtb.BidResponse
+	if err := json.Unmarshal(responseData.Body, &response); err != nil {
+		return nil, []error{err}
+	}
+
+	bidResponse := adapters.NewBidderResponseWithBidsCapacity(len(request.Imp))
+	bidResponse.Currency = response.Cur
+	for _, seatBid := range response.SeatBid {
+		for _, bid := range seatBid.Bid {
+			bid := bid
+			var bidType openrtb_ext.BidType
+			for _, imp := range request.Imp {
+				if imp.ID == bid.ImpID {
+					if imp.Banner != nil {
+						bidType = openrtb_ext.BidTypeBanner
+					}
+				}
+			}
+			b := &adapters.TypedBid{
+				Bid:     &bid,
+				BidType: bidType,
+			}
+			bidResponse.Bids = append(bidResponse.Bids, b)
+		}
+	}
+	return bidResponse, nil
+}

adapters/unicorn/unicorn_test.go

@@ -0,0 +1,20 @@
+package unicorn
+
+import (
+	"testing"
+
+	"github.com/prebid/prebid-server/adapters/adapterstest"
+	"github.com/prebid/prebid-server/config"
+	"github.com/prebid/prebid-server/openrtb_ext"
+)
+
+func TestJsonSamples(t *testing.T) {
+	bidder, buildErr := Builder(openrtb_ext.BidderUnicorn, config.Adapter{
+		Endpoint: "https://ds.uncn.jp"})
+
+	if buildErr != nil {
+		t.Fatalf("Builder returned unexpected error %v", buildErr)
+	}
+
+	adapterstest.RunJSONBidderTest(t, "unicorntest", bidder)
+}