// deletes the content specified by content id from the contentService
// Optionally a directory prefix to the object being inserted
public void Delete(string contentId, string prefix = "")
{
// peform removal of object using GCS
string objectName = GCSContentService.BuildObjectName(prefix, contentId);
this.storage.DeleteObject(this.bucketName, objectName);
}
// Encode the given content id in to a url so that can be used to
// retrieve the content given the content id returned by
// Insert()/update()
// Optionally a directory prefix to the object being inserted
public string EncodeUrl(string contentId, string prefix = "")
{
// get media link using GCS
string objectName = GCSContentService.BuildObjectName(prefix, contentId);
var storageObject = this.storage.GetObject(this.bucketName, objectName);
return(storageObject.MediaLink);
}
/* IContentService interface */
// Insert the content in the given contentStream to the content service
// returns a content id string which can be used to retrieve the content
// contentType provides a MIME content type & a prefix to the path
// Optionally a directory prefix to the object being inserted
public string Insert(Stream contentStream, string contentType,
string prefix = "")
{
// generate object nae for the new content
string contentId = Guid.NewGuid().ToString();
string objectName = GCSContentService.BuildObjectName(prefix, contentId);
// perform the upload using GCS
this.storage.UploadObject(
this.bucketName, objectName, contentType, contentStream);
return(contentId);
}
// Check if the content service has the content given by content id
// returns true if the content exists, otherwise false
public bool HasObject(string contentId, string prefix = "")
{
try
{
string objectName = GCSContentService.BuildObjectName(prefix, contentId);
this.storage.GetObject(this.bucketName, objectName);
}
catch
{
return(false);
}
return(true);
}
// Updates the content in the given contentStream to the content service
// specified by contentId
// returns a content id string which can be used to retrieve the content
// Optionally a directory prefix to the object being inserted
public string Update(string contentId, Stream contentStream, string prefix = "")
{
// perform the upload of updated file using GCS
string objectName = GCSContentService.BuildObjectName(prefix, contentId);
var storageObject = this.storage.GetObject(this.bucketName, objectName);
// remove existing object
this.Delete(contentId, prefix);
// update object
this.storage.UploadObject(
this.bucketName, objectName,
storageObject.ContentType, contentStream);
return(contentId);
}
