public async void SearchPhotoAsync(string searchSessionId, string query = null, string tags = null, Dictionary<string, string> parameters = null)
{
string timestamp = DateTimeUtils.GetTimestamp();
string nonce = Guid.NewGuid().ToString().Replace("-", null);
Dictionary<string, string> paramDict = new Dictionary<string, string>();
paramDict["method"] = "flickr.photos.search";
paramDict["format"] = "json";
paramDict["nojsoncallback"] = "1";
paramDict["oauth_consumer_key"] = consumerKey;
paramDict["oauth_nonce"] = nonce;
paramDict["oauth_signature_method"] = "HMAC-SHA1";
paramDict["oauth_timestamp"] = timestamp;
paramDict["oauth_token"] = AccessToken;
paramDict["oauth_version"] = "1.0";
paramDict["extras"] = UrlHelper.Encode(commonExtraParameters);
if (query != null)
paramDict["text"] = UrlHelper.Encode(query);
if (tags != null)
paramDict["tags"] = UrlHelper.Encode(tags);
if (parameters != null)
{
foreach (var entry in parameters)
{
paramDict[entry.Key] = entry.Value;
}
}
string paramString = GenerateParamString(paramDict);
string signature = GenerateSignature("GET", AccessTokenSecret, "https://api.flickr.com/services/rest", paramString);
string requestUrl = "https://api.flickr.com/services/rest?" + paramString + "&oauth_signature=" + signature;
HttpWebResponse response = await DispatchRequest("GET", requestUrl, null).ConfigureAwait(false);
using (StreamReader reader = new StreamReader(response.GetResponseStream()))
{
if (response.StatusCode != HttpStatusCode.OK)
{
HandleHTTPException(response);
return;
}
string jsonString = await reader.ReadToEndAsync().ConfigureAwait(false);
if (!TryHandleResponseException(jsonString, () => { SearchPhotoAsync(searchSessionId, query, tags, parameters); }))
return;
PhotoSearchEventArgs evt = new PhotoSearchEventArgs();
evt.SearchSessionId = searchSessionId;
evt.Response = jsonString;
PhotoSearchReturned.DispatchEvent(this, evt);
}
}
private void OnPhotoSearchReturned(object sender, PhotoSearchEventArgs e)
{
JObject json = JObject.Parse(e.Response);
JObject photosetJson = (JObject)json["photos"];
int page = int.Parse(photosetJson["page"].ToString());
int perPage = int.Parse(photosetJson["perpage"].ToString());
int numTotal = int.Parse(photosetJson["total"].ToString());
List<Photo> photos = new List<Photo>();
foreach (var photoJson in photosetJson["photo"])
{
Photo photo = PhotoFactory.PhotoWithJObject((JObject)photoJson);
photos.Add(photo);
}
PhotoSearchResultEventArgs evt = new PhotoSearchResultEventArgs();
evt.SearchSessionId = e.SearchSessionId;
evt.Page = page;
evt.PerPage = perPage;
evt.TotalCount = numTotal;
evt.Photos = photos;
PhotoSearchCompleted.DispatchEvent(this, evt);
}