/// <summary>
/// Creates a media resource using the information present in the HttpContext.
/// </summary>
/// <param name="context">The HttpContext for the incoming HTTP request.</param>
/// <returns>An AtomEntryDocument corresponding to the newly created media resource.</returns>
private AtomEntryDocument CreateMedia(HttpContext context)
{
SyndicationItem item = null;
string collectionName = AtomPubHelper.GetValueOfParameterFromUri(context,
base.BaseUri,
AtomPubParameterType.CollectionName);
// Get byte array to update media.
BinaryReader reader = new BinaryReader(context.Request.InputStream);
byte[] media = new byte[context.Request.InputStream.Length];
reader.Read(media, 0, media.Length);
string fileExtention = string.Empty;
if (context.Request.Headers.AllKeys.Contains("Content-Disposition"))
{
fileExtention = AtomPubHelper.GetFileExtentionFromContentDisposition(
context.Request.Headers["Content-Disposition"]);
}
IAtomPubStoreWriter swordStoreWriter = AtomPubStoreFactory.GetSwordStoreWriter();
item = swordStoreWriter.CreateMedia(collectionName, context.Request.ContentType, media, fileExtention);
AtomEntryDocument atomEntryDocument = null;
if (null != item)
{
// Add <sword:treatment>Successfully created a {Collection Name}</sword:treatment> element.
SwordPostProcessor.AddTreatmentElement(collectionName, item);
// Create atom entry document from syndication item.
atomEntryDocument = new AtomEntryDocument(item);
}
return(atomEntryDocument);
}
/// <summary>
/// Handles the POST request send to the collection Uri. The method assumes that the request is
/// already validated using ValidateRequest method.
/// </summary>
/// <param name="context">HttpContext containing the request.</param>
/// <param name="statusCode">Contains the status of the request.</param>
/// <returns>A string containing the response for the specified AtomPub request.</returns>
/// <remarks>If a zip file is sent with the POST request to the collection uri,
/// the contents of the zip file are extracted and the individual files will be uploaded
/// in the repository.
/// The zip file should contain the mets.xml containing the metadata of the individual files.
/// If mets.xml is not found in the specified zip file, status code 'PreconditionFailed' will
/// be returned.
/// </remarks>
public override string ProcessRequest(HttpContext context, out System.Net.HttpStatusCode statusCode)
{
string response = string.Empty;
AtomEntryDocument atomEntryDocument = null;
bool isAtomEntryType = AtomPubHelper.IsAtomEntryMediaType(context.Request.ContentType);
try
{
if (isAtomEntryType)
{
response = base.ProcessRequest(context, out statusCode);
System.Xml.XmlTextReader responseReader = null;
try
{
responseReader = new System.Xml.XmlTextReader(response, System.Xml.XmlNodeType.Document, null);
SyndicationItem responseItem = SyndicationItem.Load(responseReader);
string collectionName = AtomPubHelper.GetValueOfParameterFromUri(context,
base.BaseUri,
AtomPubParameterType.CollectionName);
// Add <sword:treatment>Successfully created a {Collection Name}</sword:treatment> element.
SwordPostProcessor.AddTreatmentElement(collectionName, responseItem);
// Create atom entry document from syndication item.
atomEntryDocument = new AtomEntryDocument(responseItem);
}
finally
{
responseReader.Close();
}
context.Response.ContentType = AtomPubConstants.AtomEntryContentType;
}
else
{
// If request stream contains something other than AtomEntryDocument,
// then client wants to create new member with Media.
atomEntryDocument = this.CreateMedia(context);
// Done this separately because if AtomEntry is null due to some reasons,
// then also it will set the content type.
context.Response.ContentType = AtomPubConstants.AtomEntryContentType;
}
// return the atom entry response.
if (null != atomEntryDocument)
{
response = atomEntryDocument.AtomEntry;
statusCode = System.Net.HttpStatusCode.Created;
}
else
{
statusCode = System.Net.HttpStatusCode.InternalServerError;
}
}
catch (MetsException ex)
{
statusCode = System.Net.HttpStatusCode.InternalServerError;
response = ex.Message;
}
catch (SwordException ex)
{
statusCode = System.Net.HttpStatusCode.UnsupportedMediaType;
response = ex.Message;
}
finally
{
string zipExtractedPath = context.Items[SwordConstants.ZipExtractedPath] as string;
if (!string.IsNullOrEmpty(zipExtractedPath) && Directory.Exists(zipExtractedPath))
{
Directory.Delete(zipExtractedPath, true);
context.Items[SwordConstants.ZipExtractedPath] = null;
}
}
return(response);
}
/// <summary>
/// Processes the GET and POST requests sent to the Sword service.
/// </summary>
/// <param name="context">HttpContext object containing the request information.</param>
/// <param name="statusCode">Out parameter returns the status of the request.</param>
/// <returns>Response in string format.</returns>
public string ProcessRequest(HttpContext context, out System.Net.HttpStatusCode statusCode)
{
var unknownContentHeaders = context.Request.Headers.AllKeys
.Intersect(AtomPubHelper.UnknownContentHeaders);
if (0 < unknownContentHeaders.Count())
{
statusCode = HttpStatusCode.NotImplemented;
return(string.Format(CultureInfo.InvariantCulture,
Resources.ATOMPUB_UNKNOWN_CONTENT_HEADER,
unknownContentHeaders.First()));
}
HttpRequestProcessor processor = null;
switch (context.Request.RequestType)
{
case PlatformConstants.GetRequestType:
processor = new SwordGetProcessor();
break;
case PlatformConstants.PostRequestType:
processor = new SwordPostProcessor();
break;
case PlatformConstants.PutRequestType:
processor = new AtomPubPutProcessor(SwordHelper.GetBaseUri());
break;
case PlatformConstants.DeleteRequestType:
processor = new AtomPubDeleteProcessor(SwordHelper.GetBaseUri());
break;
default:
processor = null;
break;
}
if (null == processor)
{
statusCode = HttpStatusCode.NotImplemented;
return(Resources.SWORD_UNSUPPORTED_REQUEST_TYPE);
}
try
{
string responseString = string.Empty;
// Check if it is a valid request
if (processor.ValidateRequest(context, out responseString))
{
return(processor.ProcessRequest(context, out statusCode));
}
else
{
statusCode = HttpStatusCode.BadRequest;
return(responseString);
}
}
catch (UnauthorizedException ex)
{
statusCode = HttpStatusCode.Forbidden;
return(ex.Message);
}
}
