/// <summary>
/// Send an HTTP GET request to the specified URI and intepret the result as TResult.
/// </summary>
/// <typeparam name="TResult">The .NET class to use for response deserialization.</typeparam>
/// <param name="uri">A uniform resource identifier that is the target of this GET request.</param>
/// <param name="dataFormat">One of the data-interchange formats that Socrata supports. The default is JSON.</param>
/// <returns>The HTTP response, deserialized into an object of type <typeparamref name="TResult"/>.</returns>
internal TResult read <TResult>(Uri uri, SodaDataFormat dataFormat = SodaDataFormat.JSON)
where TResult : class
{
var request = new SodaRequest(uri, "GET", AppToken, Username, password, dataFormat, null, RequestTimeout);
return(request.ParseResponse <TResult>());
}
/// <summary>
/// Initialize a new SodaRequest.
/// </summary>
/// <param name="uri">The Uri to send the request to.</param>
/// <param name="method">The HTTP method to use for the request.</param>
/// <param name="appToken">The Socrata App Token to send with the request.</param>
/// <param name="username">The Socrata user account to use for the request.</param>
/// <param name="password">The password for the specified Socrata <paramref name="username"/>.</param>
/// <param name="dataFormat">One of the data-interchange formats that Socrata supports. The default is JSON.</param>
/// <param name="payload">The body of the request.</param>
/// <param name="timeout">The number of milliseconds to wait for a response before throwing a Timeout WebException.</param>
internal SodaRequest(Uri uri, string method, string appToken, string username, string password, SodaDataFormat dataFormat = SodaDataFormat.JSON, string payload = null, int?timeout = null)
: this()
{
this.dataFormat = dataFormat;
this.Client = new HttpClient();
this.Client.Timeout = timeout.HasValue ? new TimeSpan(0, 0, 0, 0, timeout.Value) : Client.Timeout;
this.RequestMessage = new HttpRequestMessage {
RequestUri = uri, Method = new HttpMethod(method)
};
if (!String.IsNullOrEmpty(appToken))
{
//http://dev.socrata.com/docs/app-tokens.html
this.Client.DefaultRequestHeaders.Add("X-App-Token", appToken);
}
if (!String.IsNullOrEmpty(username) && !String.IsNullOrEmpty(password))
{
//Authentication using HTTP Basic Authentication
//http://dev.socrata.com/docs/authentication.html
string authKVP = String.Format("{0}:{1}", username, password);
byte[] authBytes = Encoding.UTF8.GetBytes(authKVP);
this.Client.DefaultRequestHeaders.Add("Authorization", String.Format("Basic {0}", Convert.ToBase64String(authBytes)));
}
//http://dev.socrata.com/docs/formats/index.html
switch (dataFormat)
{
case SodaDataFormat.JSON:
Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
break;
case SodaDataFormat.CSV:
this.Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("text/csv"));
this.Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
break;
case SodaDataFormat.XML:
this.Client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/rdf+xml"));
break;
}
if (!String.IsNullOrEmpty(payload))
{
switch (dataFormat)
{
case SodaDataFormat.JSON:
this.RequestMessage.Content = new StringContent(payload, Encoding.UTF8, "application/json");
break;
case SodaDataFormat.CSV:
this.RequestMessage.Content = new StringContent(payload, Encoding.UTF8, "text/csv");
break;
case SodaDataFormat.XML:
this.RequestMessage.Content = new StringContent(payload, Encoding.UTF8, "application/rdf+xml");
break;
}
}
}
/// <summary>
/// Replace any existing rows with the payload data, using the specified resource identifier.
/// </summary>
/// <param name="payload">A string of serialized data.</param>
/// <param name="dataFormat">One of the data-interchange formats that Socrata supports, into which the payload has been serialized.</param>
/// <param name="resourceId">The identifier (4x4) for a resource on the Socrata host to target.</param>
/// <returns>A <see cref="SodaResult"/> indicating success or failure.</returns>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown if the specified <paramref name="dataFormat"/> is equal to <see cref="SodaDataFormat.XML"/>.</exception>
/// <exception cref="System.ArgumentOutOfRangeException">Thrown if the specified <paramref name="resourceId"/> does not match the Socrata 4x4 pattern.</exception>
/// <exception cref="System.InvalidOperationException">Thrown if this SodaClient was initialized without authentication credentials.</exception>
public SodaResult Replace(string payload, SodaDataFormat dataFormat, string resourceId)
{
if (dataFormat == SodaDataFormat.XML)
{
throw new ArgumentOutOfRangeException("dataFormat", "XML is not a valid format for write operations.");
}
if (FourByFour.IsNotValid(resourceId))
{
throw new ArgumentOutOfRangeException("resourceId", "The provided resourceId is not a valid Socrata (4x4) resource identifier.");
}
if (String.IsNullOrEmpty(Username) || String.IsNullOrEmpty(password))
{
throw new InvalidOperationException("Write operations require an authenticated client.");
}
var uri = SodaUri.ForResourceAPI(Host, resourceId);
var request = new SodaRequest(uri, "PUT", AppToken, Username, password, dataFormat, payload);
SodaResult result = null;
try
{
if (dataFormat == SodaDataFormat.JSON)
{
result = request.ParseResponse <SodaResult>();
}
else if (dataFormat == SodaDataFormat.CSV)
{
string resultJson = request.ParseResponse <string>();
result = Newtonsoft.Json.JsonConvert.DeserializeObject <SodaResult>(resultJson);
}
}
catch (WebException webException)
{
string message = webException.UnwrapExceptionMessage();
result = new SodaResult()
{
Message = webException.Message, IsError = true, ErrorCode = message, Data = payload
};
}
catch (Exception ex)
{
result = new SodaResult()
{
Message = ex.Message, IsError = true, ErrorCode = ex.Message, Data = payload
};
}
return(result);
}
/// <summary>
/// Creates the source for the specified revision.
/// </summary>
/// <param name="data">A string of serialized data.</param>
/// <param name="revision">The revision created as part of a create revision step.</param>
/// <param name="dataFormat">The format of the data.</param>
/// <param name="filename">The filename that should be associated with this upload.</param>
/// <returns>A <see cref="Source"/> indicating success or failure.</returns>
/// <exception cref="System.InvalidOperationException">Thrown if this SodaDSMAPIClient was initialized without authentication credentials.</exception>
public Source CreateSource(string data, Revision revision, SodaDataFormat dataFormat = SodaDataFormat.CSV, string filename = "NewUpload")
{
if (String.IsNullOrEmpty(data))
{
throw new ArgumentException("Data must be provided.", "data");
}
if (String.IsNullOrEmpty(username) || String.IsNullOrEmpty(password))
{
throw new InvalidOperationException("Write operations require an authenticated client.");
}
if (revision == null)
{
throw new ArgumentException("Revision required.", "revision");
}
var sourceUri = SodaUri.ForSource(Host, revision.GetSourceEndpoint());
Debug.WriteLine(sourceUri.ToString());
revision.GetRevisionNumber();
// Construct Revision Request body
Newtonsoft.Json.Linq.JObject payload = new Newtonsoft.Json.Linq.JObject();
Newtonsoft.Json.Linq.JObject source_type = new Newtonsoft.Json.Linq.JObject();
Newtonsoft.Json.Linq.JObject parse_option = new Newtonsoft.Json.Linq.JObject();
source_type["type"] = "upload";
source_type["filename"] = filename;
parse_option["parse_source"] = true;
payload["source_type"] = source_type;
payload["parse_options"] = parse_option;
var createSourceRequest = new SodaRequest(sourceUri, "POST", null, username, password, SodaDataFormat.JSON, payload.ToString());
Result sourceOutput = createSourceRequest.ParseResponse <Result>();
string uploadDataPath = sourceOutput.Links["bytes"];
var uploadUri = SodaUri.ForUpload(Host, uploadDataPath);
Debug.WriteLine(uploadUri.ToString());
var fileUploadRequest = new SodaRequest(uploadUri, "POST", null, username, password, dataFormat, data);
fileUploadRequest.SetDataType(SodaDataFormat.JSON);
Result result = fileUploadRequest.ParseResponse <Result>();
return(new Source(result));
}
/// <summary>
/// Initialize a new SodaRequest.
/// </summary>
/// <param name="uri">The Uri to send the request to.</param>
/// <param name="method">The HTTP method to use for the request.</param>
/// <param name="appToken">The Socrata App Token to send with the request.</param>
/// <param name="username">The Socrata user account to use for the request.</param>
/// <param name="password">The password for the specified Socrata <paramref name="username"/>.</param>
/// <param name="dataFormat">One of the data-interchange formats that Socrata supports. The default is JSON.</param>
/// <param name="payload">The body of the request.</param>
/// <param name="timeout">The number of milliseconds to wait for a response before throwing a Timeout WebException.</param>
internal SodaRequest(Uri uri, string method, string appToken, string username, string password, SodaDataFormat dataFormat = SodaDataFormat.JSON, string payload = null, int?timeout = null)
{
this.dataFormat = dataFormat;
var request = WebRequest.Create(uri) as HttpWebRequest;
request.Method = method.ToUpper();
request.ProtocolVersion = new System.Version("1.1");
request.PreAuthenticate = true;
request.Timeout = timeout.HasValue ? timeout.Value : request.Timeout;
if (!String.IsNullOrEmpty(appToken))
{
//http://dev.socrata.com/docs/app-tokens.html
request.Headers.Add("X-App-Token", appToken);
}
if (!String.IsNullOrEmpty(username) && !String.IsNullOrEmpty(password))
{
//Authentication using HTTP Basic Authentication
//http://dev.socrata.com/docs/authentication.html
string authKVP = String.Format("{0}:{1}", username, password);
byte[] authBytes = Encoding.UTF8.GetBytes(authKVP);
request.Headers.Add("Authorization", String.Format("Basic {0}", Convert.ToBase64String(authBytes)));
}
//http://dev.socrata.com/docs/formats/index.html
switch (dataFormat)
{
case SodaDataFormat.JSON:
request.Accept = "application/json";
if (!request.Method.Equals("GET"))
{
request.ContentType = "application/json";
}
break;
case SodaDataFormat.CSV:
switch (request.Method)
{
case "GET":
request.Accept = "text/csv";
break;
case "POST":
case "PUT":
request.ContentType = "text/csv";
break;
}
break;
case SodaDataFormat.XML:
request.Accept = "application/rdf+xml";
break;
}
if (!String.IsNullOrEmpty(payload))
{
byte[] bodyBytes = Encoding.UTF8.GetBytes(payload);
using (var stream = request.GetRequestStream())
{
stream.Write(bodyBytes, 0, bodyBytes.Length);
}
}
this.webRequest = request;
}
internal void SetDataType(SodaDataFormat format)
{
dataFormat = format;
}
