func RetrieveAccessKeyFromRequest(ds auth.DataStore, req *http.Request) (*dm.AccessKey, error) {
q := req.URL.Query()
accessKeyId := q.Get("DSOCAccessKeyId")
if accessKeyId == "" {
return nil, nil
}
return ds.RetrieveAccessKey(accessKeyId)
}
func CheckSignature(ds auth.DataStore, req *http.Request) (hasSignature bool, userId, consumerId string, err os.Error) {
q := req.URL.Query()
signature := q.Get("Signature")
accessKeyId := q.Get("DSOCAccessKeyId")
if signature == "" || accessKeyId == "" {
return
}
hasSignature = true
accessKey, err := ds.RetrieveAccessKey(accessKeyId)
if err != nil {
return
}
if accessKey == nil {
err = ErrorInvalidAccessKeyId
return
}
signit := NewSigner(accessKeyId, accessKey.PrivateKey)
hasSignature, _, err = signit.CheckSignature(req)
if hasSignature && err == nil {
userId, consumerId = accessKey.UserId, accessKey.ConsumerId
}
return
}