// Create compiler directives to exclude all but this in NET4 version
// public oEmbedResponse Read(string api, string url, int? maxwidth=null, int? maxheight=null, oEmbedFormat format=oEmbedFormat.Unspecified,
// NameValueCollection queryParameters=null, string userAgent=null)
// {
// return
// Read(new oEmbedRequest(api, url, maxwidth, maxheight, format,
// queryParameters ?? new NameValueCollection(), userAgent));
// }
public oEmbedResponse Read(oEmbedRequest request)
{
var response = new oEmbedResponse();
if (!string.IsNullOrEmpty(request.Api) &&
!string.IsNullOrEmpty(request.Url))
{
response = GetQueryResult(request);
if (response.oEmbed != null)
{
response.oEmbed.Url = response.oEmbed.Url ?? request.Url;
}
else
{
response.StatusCode = HttpStatusCode.NotFound;
}
}
else
{
response.StatusCode = HttpStatusCode.BadRequest;
response.StatusDescription = "Resource Api or Url is null or empty";
}
return response;
}
public static oEmbed Deserialize(oEmbedResponse response)
{
return Deserialize(response.RawResult, response.Format);
}
private static IEnumerable<ValidationRule> ValidateBasic(oEmbedResponse response)
{
var brokenRules = new List<ValidationRule>();
if (response.oEmbed == null)
{
brokenRules.Add(new ValidationRule("Response Content Body", "Could not parse response"));
return brokenRules;
}
if (response.oEmbed.Version != "1.0")
brokenRules.Add(new ValidationRule("Version",
string.Format("Version number must be 1.0, but instead was {0}",
response.oEmbed.Version)));
return brokenRules;
}
private static IEnumerable<ValidationRule> ValidateFormat(oEmbedResponse response, oEmbedFormat requestFormat)
{
var brokenRules = new List<ValidationRule>();
if (requestFormat != oEmbedFormat.Unspecified &&
requestFormat != response.Format)
brokenRules.Add(new ValidationRule("Format", "Requested format (" + requestFormat.ToString().ToLower() +
") does not match response (" +
response.Format.ToString().ToLower() + ")"));
return brokenRules;
}
private static IEnumerable<ValidationRule> ValidateThumbnail(oEmbedResponse response, int maxheight, int maxwidth)
{
var brokenRules = new List<ValidationRule>();
if (!string.IsNullOrEmpty(response.oEmbed.ThumbnailUrl)
&& (response.oEmbed.ThumbnailWidth == 0 ||
response.oEmbed.ThumbnailHeight == 0))
brokenRules.Add(new ValidationRule("Thumbnail",
"ThumbnailUrl requires ThumbnailWidth and ThumbnailHeight"));
if (response.oEmbed.ThumbnailWidth > 0
&& (string.IsNullOrEmpty(response.oEmbed.ThumbnailUrl) ||
response.oEmbed.ThumbnailHeight == 0))
brokenRules.Add(new ValidationRule("Thumbnail",
"ThumbnailWidth requires ThumbnailUrl and ThumbnailHeight"));
if (response.oEmbed.ThumbnailHeight > 0
&& (string.IsNullOrEmpty(response.oEmbed.ThumbnailUrl) ||
response.oEmbed.ThumbnailWidth == 0))
brokenRules.Add(new ValidationRule("Thumbnail",
"ThumbnailHeight requires ThumbnailUrl and ThumbnailWidth"));
if (response.oEmbed.ThumbnailHeight > maxheight)
brokenRules.Add(new ValidationRule("Thumbnail",
string.Format(
"ThumbnailHeight of {0} greater than requested maxheight of {1}",
response.oEmbed.ThumbnailHeight,
maxheight)));
if (response.oEmbed.ThumbnailWidth > maxwidth)
brokenRules.Add(new ValidationRule("Thumbnail",
string.Format(
"ThumbnailWidth of {0} is greater than requested maxwidth of {1}",
response.oEmbed.ThumbnailWidth,
maxwidth)));
return brokenRules;
}
private static IEnumerable<ValidationRule> ValidateSize(oEmbedResponse response, int maxheight, int maxwidth)
{
var brokenRules = new List<ValidationRule>();
if (response.oEmbed.Height <= 0 || response.oEmbed.Height > maxheight)
brokenRules.Add(new ValidationRule("Size",
string.Format(
"Height of {0} is greater than requested maxheight of {1}",
response.oEmbed.Height, maxheight)));
if (response.oEmbed.Width <= 0 || response.oEmbed.Width > maxwidth)
brokenRules.Add(new ValidationRule("Size",
string.Format(
"Width of {0} is greater than requested maxwidth of {1}",
response.oEmbed.Width, maxwidth)));
return brokenRules;
}
private static IEnumerable<ValidationRule> ValidateValue(string requiredValue, oEmbedResponse response)
{
var brokenRules = new List<ValidationRule>();
if (string.IsNullOrEmpty(requiredValue))
brokenRules.Add(new ValidationRule("Required Value",
string.Format(
"Response is missing required value for {0} for type {1}",
requiredValue, response.oEmbed.Type)));
return brokenRules;
}
private IList<ValidationRule> ValidateType(oEmbedResponse response, int maxheight, int maxwidth)
{
var brokenRules = new List<ValidationRule>();
switch (response.oEmbed.Type)
{
case oEmbedType.Photo:
brokenRules.AddRange(ValidateValue(response.oEmbed.Url, response));
break;
case oEmbedType.Rich:
case oEmbedType.Video:
brokenRules.AddRange(ValidateValue(response.oEmbed.Html, response));
break;
case oEmbedType.Link:
break;
case oEmbedType.Unspecified:
brokenRules.Add(new ValidationRule("Type", "Response Type must be Photo, Rich, Video, or Link"));
break;
}
return brokenRules;
}
private void ValidateResponse(oEmbedResponse response, int maxwidth, int maxheight, oEmbedFormat requestFormat)
{
response.BrokenRules.AddRange(ValidateBasic(response));
if (!response.IsValid) return;
response.BrokenRules.AddRange(ValidateThumbnail(response, maxheight, maxwidth));
response.BrokenRules.AddRange(ValidateFormat(response, requestFormat));
response.BrokenRules.AddRange(ValidateType(response, maxheight, maxwidth));
response.BrokenRules.AddRange(ValidateSize(response, maxheight, maxwidth));
}
private oEmbedResponse GetOEmbedResponseFromWeb(oEmbedRequest request, string query)
{
var readResponse = new oEmbedResponse();
var webrequest = (HttpWebRequest) WebRequest.Create(query);
if (request.UserAgent != null)
webrequest.UserAgent = request.UserAgent;
if (request.Format == oEmbedFormat.Json) webrequest.Accept = "application/json";
if (request.Format == oEmbedFormat.Xml) webrequest.Accept = "text/xml";
using (var response = webrequest.GetResponse() as HttpWebResponse)
{
if (response != null)
{
readResponse.StatusCode = response.StatusCode;
readResponse.StatusDescription = response.StatusDescription;
readResponse.RawResult = ReadResponse(response.GetResponseStream());
if (response.ContentType.ToLower().Contains("xml"))
readResponse.Format = oEmbedFormat.Xml;
if (response.ContentType.ToLower().Contains("json"))
readResponse.Format = oEmbedFormat.Json;
if (response.StatusCode == HttpStatusCode.OK)
{
readResponse.oEmbed = oEmbedSerializer.Deserialize(readResponse);
ValidateResponse(readResponse, request.MaxWidth ?? int.MaxValue,
request.MaxHeight ?? int.MaxValue, request.Format);
}
response.Close();
}
}
return readResponse;
}
