/// <summary>
/// Sends a web request with the data either in the query string or in the body.
/// </summary>
/// <param name="config">
/// The configuration for the data to be sent (e.g., contains the URL and request method).
/// </param>
/// <param name="context">
/// The context for the current form submission.
/// </param>
/// <param name="data">
/// The data to send.
/// </param>
/// <param name="sendInBody">
/// Send the data as part of the body (or in the query string)?
/// </param>
/// <param name="sendJson">
/// Send the data as json
/// </param>
/// <returns>
/// True, if the request was a success; otherwise, false.
/// </returns>
/// <remarks>
/// Parts of this function are from: http://stackoverflow.com/a/9772003/2052963
/// and http://stackoverflow.com/questions/14702902
/// </remarks>
private SendDataResult SendData(SendDataConfiguration config, FormSubmissionContext context,
IEnumerable <KeyValuePair <string, string> > data, bool sendInBody, bool sendJson)
{
// Construct a URL, possibly containing the data as query string parameters.
var sendInUrl = !sendInBody;
var sendDataResult = new SendDataResult();
var uri = new Uri(config.Url);
var bareUrl = uri.GetLeftPart(UriPartial.Path);
var keyValuePairs = data as KeyValuePair <string, string>[] ?? data.ToArray();
var strQueryString = ConstructQueryString(uri, keyValuePairs);
var hasQueryString = !string.IsNullOrWhiteSpace(strQueryString);
var requestUrl = hasQueryString && sendInUrl
? $"{bareUrl}?{strQueryString}"
: config.Url;
var enableLogging = WebConfigurationManager.AppSettings["Formulate:EnableLogging"];
var jsonMode = WebConfigurationManager.AppSettings["Formulate:Send Data JSON Mode"];
var isJsonObjectMode = "JSON Object".InvariantEquals(jsonMode);
var isWrappedObjectMode = "Wrap JSON Object in Array".InvariantEquals(jsonMode);
// Attempt to send the web request.
try
{
// Construct web request.
var request = (HttpWebRequest)WebRequest.Create(requestUrl);
request.AllowAutoRedirect = false;
request.UserAgent = WebUserAgent;
request.Method = config.Method;
// Send an event indicating that the data is about to be sent (which allows code
// external to Formulate to modify the request).
var sendContext = new SendingDataContext()
{
Configuration = config,
Data = keyValuePairs,
Request = request,
SubmissionContext = context
};
SendingData?.Invoke(sendContext);
// Update the key/value pairs in case they got changed in the sending data event.
// This only updates the methods that send the data in the body (as the URL has
// already been set on the request).
keyValuePairs = sendContext.Data as KeyValuePair <string, string>[]
?? sendContext.Data.ToArray();
// Send the data in the body (rather than the query string)?
if (sendInBody)
{
if (sendJson)
{
// Variables.
var json = default(string);
// Send an event indicating that the data is about to be serialized to
// JSON (which allows code external to Formulate to modify the JSON)?
if (SerializingJson != null)
{
json = SerializingJson.Invoke(sendContext.Data);
}
else
{
// If sending as JSON, group duplicate keys/value pairs.
var grouped = keyValuePairs.GroupBy(x => x.Key).Select(x => new
{
Key = x.Key,
Value = x.Select(y => y.Value)
}).ToDictionary(x => x.Key,
x => x.Value.Count() > 1 ? x.Value.ToArray() as object : x.Value.FirstOrDefault());
// Convert data to JSON.
if (isJsonObjectMode)
{
json = JsonConvert.SerializeObject(grouped);
}
else if (isWrappedObjectMode)
{
json = JsonConvert.SerializeObject(new[] { grouped });
}
else
{
// Ideally, we can remove this "else" branch later. We never really want this
// mode to be used, but it's here for legacy support in case anybody managed
// to make use of this funky mode.
json = JsonConvert.SerializeObject(new[] { grouped });
}
}
// Log JSON being sent.
if (enableLogging == "true")
{
LogHelper.Info <SendDataHandler>("Sent URL: " + config.Url);
LogHelper.Info <SendDataHandler>("Sent Data: " + JsonHelper.FormatJsonForLogging(json));
}
// Write JSON data to the request request.
var postBytes = Encoding.UTF8.GetBytes(json);
request.ContentType = "application/json; charset=utf-8";
request.ContentLength = postBytes.Length;
using (var postStream = request.GetRequestStream())
{
postStream.Write(postBytes, 0, postBytes.Length);
}
}
else
{
// Log data being sent.
if (enableLogging == "true")
{
LogHelper.Info <SendDataHandler>("Sent URL: " + config.Url);
LogHelper.Info <SendDataHandler>("Sent Data: " + strQueryString);
}
// Update the data (since the sending data event may have modified it).
uri = new Uri(config.Url);
strQueryString = ConstructQueryString(uri, keyValuePairs);
// Write the data to the request stream.
var postBytes = Encoding.UTF8.GetBytes(strQueryString);
request.ContentType = "application/x-www-form-urlencoded";
request.ContentLength = postBytes.Length;
var postStream = request.GetRequestStream();
postStream.Write(postBytes, 0, postBytes.Length);
}
}
// Get and retain response.
var response = (HttpWebResponse)request.GetResponse();
sendDataResult.HttpWebResponse = response;
var responseStream = response.GetResponseStream();
var reader = new StreamReader(responseStream);
var resultText = reader.ReadToEnd();
sendDataResult.ResponseText = resultText;
sendDataResult.Success = true;
}
catch (Exception ex)
{
LogHelper.Error <SendDataHandler>(SendDataError, ex);
sendDataResult.ResponseError = ex;
sendDataResult.Success = false;
}
// Return the result of the request.
return(sendDataResult);
}
/// <summary>
/// Deserializes the configuration for a send data handler.
/// </summary>
/// <param name="configuration">
/// The serialized configuration.
/// </param>
/// <returns>
/// The deserialized configuration.
/// </returns>
public object DeserializeConfiguration(string configuration)
{
// Variables.
var fields = new List <FieldMapping>();
var config = new SendDataConfiguration()
{
Fields = fields
};
var configData = JsonHelper.Deserialize <JObject>(configuration);
var dynamicConfig = configData as dynamic;
var properties = configData.Properties().Select(x => x.Name);
var propertySet = new HashSet <string>(properties);
var handlerTypes = ReflectionHelper
.GetTypesImplementingInterface <IHandleSendDataResult>();
// Get field mappings.
if (propertySet.Contains("fields"))
{
foreach (var field in dynamicConfig.fields)
{
fields.Add(new FieldMapping()
{
FieldId = GuidHelper.GetGuid(field.id.Value as string),
FieldName = field.name.Value as string
});
}
}
// Set the function that handles the result.
if (propertySet.Contains("resultHandler"))
{
var strHandler = dynamicConfig.resultHandler.Value as string;
var handlerType = handlerTypes
.FirstOrDefault(x => x.AssemblyQualifiedName == strHandler);
var resultHandler = default(IHandleSendDataResult);
if (handlerType != null)
{
resultHandler = Activator.CreateInstance(handlerType) as IHandleSendDataResult;
}
config.ResultHandler = resultHandler;
}
// Get simple properties.
if (propertySet.Contains("url"))
{
config.Url = dynamicConfig.url.Value as string;
}
if (propertySet.Contains("method"))
{
config.Method = dynamicConfig.method.Value as string;
}
if (propertySet.Contains("transmissionFormat"))
{
config.TransmissionFormat = dynamicConfig.transmissionFormat.Value as string;
}
// Return the send data configuration.
return(config);
}
