public virtual void DeleteResource(RemoteOperationContext context, string path)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var uri = GetUri(path);
using (var client = CreateWebClient())
{
if (client == null)
{
throw new InvalidOperationException();
}
SetupWebClient(client);
try
{
client.UploadString(uri, "DELETE", string.Empty);
}
catch (Exception e)
{
if (!IsNotFound(e)) // already deleted?
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on DELETE " + uri + ": " + e.Message);
throw;
}
context.Log(TraceLevel.Warning, "Error on DELETE " + uri + ": " + e.Message);
}
}
}
public virtual void CreateDirectory(RemoteOperationContext context, string path)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var uri = GetUri(path);
using (var client = CreateWebClient())
{
if (client == null)
{
throw new InvalidOperationException();
}
SetupWebClient(client);
try
{
client.UploadString(uri, "MKCOL", string.Empty);
}
catch (Exception e)
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on MKCOL " + uri + ": " + e.Message);
throw;
}
}
}
public virtual void UploadResource(RemoteOperationContext context, string path, Stream input)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
var uri = GetUri(path);
using (var client = CreateWebClient())
{
if (client == null)
{
throw new InvalidOperationException();
}
SetupWebClient(client);
// input can be null for empty files (or files that are locked but still must exist on the server)
if (input == null)
{
// but if the file already exists, don't overwrite it with an empty body
if (ResourceExists(client, uri))
{
return;
}
}
try
{
using (var stream = client.OpenWrite(uri, "PUT"))
{
input?.CopyTo(stream);
}
// Note: if you get a 404 error on this line while everything else seems ok and usully works,
// it may be due to an upload size limit from the server (limit value is by default around 30M).
// Check AmalgaDrive.DavServerSite Program.cs for more information
}
catch (Exception e)
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on PUT " + uri + ": " + e.Message);
throw;
}
}
}
private IEnumerable <IRemoteResource> EnumResources(RemoteOperationContext context, string parentPath, bool children)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
var uri = GetUri(parentPath);
using (var client = CreateWebClient())
{
if (client == null)
{
throw new InvalidOperationException();
}
SetupWebClient(client);
if (children)
{
client.Headers["depth"] = "1";
}
string xml;
try
{
xml = client.UploadString(uri, "PROPFIND", string.Empty);
}
catch (Exception e)
{
// 404?
if (!IsNotFound(e))
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on PROPFIND " + uri + ": " + e.Message);
throw;
}
context.Log(TraceLevel.Warning, "Error on PROPFIND " + uri + ": " + e.Message);
xml = null;
}
if (string.IsNullOrWhiteSpace(xml))
{
yield break;
}
var doc = new XmlDocument();
try
{
doc.LoadXml(xml);
}
catch (Exception e)
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on LoadXml " + uri + ": " + e.Message);
throw;
}
foreach (var response in doc.SelectNodes(DavNamespacePrefix + ":multistatus/" + DavNamespacePrefix + ":response", NsMgr).OfType <XmlElement>())
{
var href = response["href", DavNamespaceUri]?.InnerText;
if (href == null)
{
continue;
}
// handle relative urls
if (href.StartsWith("/"))
{
href = DriveService.BaseUri.Scheme + "://" + DriveService.BaseUri.Authority + href;
}
else if (!href.StartsWith("http:") && !href.StartsWith("https:"))
{
href = IOUtilities.UrlCombine(DriveService.BaseUri.ToString(), href);
}
if (children)
{
// skip root dir
string uris = uri.ToString();
var hrefUri = new Uri(href).ToString(); // handle escaping
if (hrefUri == uris || (!uris.EndsWith("/") && hrefUri == uris + "/"))
{
continue;
}
}
var resource = new DavResource(context, href, response["propstat", DavNamespaceUri]);
yield return(resource);
}
}
}
public virtual void DownloadResource(RemoteOperationContext context, string path, long offset, long count, Stream output)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
if (output == null)
{
throw new ArgumentNullException(nameof(output));
}
var uri = GetUri(path);
using (var client = CreateWebClient())
{
if (client == null)
{
throw new InvalidOperationException();
}
SetupWebClient(client);
// https://referencesource.microsoft.com/#mscorlib/system/io/stream.cs
// we pick a value that is the largest multiple of 4096 that is still smaller than the large object heap threshold (85K).
var buffer = new byte[81920];
try
{
using (var stream = client.OpenRead(uri))
{
// note: we don't use range as not all servers support this, but that would be an optimization
// skip [offset] bytes
while (offset > 0)
{
int read = stream.Read(buffer, 0, (int)Math.Min(buffer.Length, offset));
offset -= read;
}
// read & write [count] bytes
while (count > 0)
{
int read = stream.Read(buffer, 0, (int)Math.Min(buffer.Length, count));
count -= read;
if (read > 0)
{
output.Write(buffer, 0, read);
}
}
}
}
catch (Exception e)
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on GET " + uri + ": " + e.Message);
throw;
}
}
}
public virtual void UpdateResource(RemoteOperationContext context, string path, IRemoteResource resource, IReadOnlyDictionary <string, object> properties)
{
if (context == null)
{
throw new ArgumentNullException(nameof(context));
}
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
if (resource == null)
{
throw new ArgumentNullException(nameof(resource));
}
// properties can be null
// rename is when the resource name doesn't match the path
bool rename = resource.DisplayName != null && !resource.DisplayName.EqualsIgnoreCase(Path.GetFileName(path));
var uri = GetUri(path);
using (var client = CreateWebClient())
{
if (client == null)
{
throw new InvalidOperationException();
}
SetupWebClient(client);
string xml;
if (rename)
{
client.Headers["Overwrite"] = "t";
var newPath = Path.Combine(Path.GetDirectoryName(path), resource.DisplayName);
var newUri = GetUri(newPath);
client.Headers["Destination"] = newUri.AbsolutePath;
try
{
xml = client.UploadString(uri, "MOVE", string.Empty);
}
catch (Exception e)
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on MOVE " + uri + ": " + e.Message);
throw;
}
}
else
{
var inputDoc = new XmlDocument();
var pud = inputDoc.CreateElement(null, "propertyupdate", DavNamespaceUri);
inputDoc.AppendChild(pud);
var set = inputDoc.CreateElement(null, "set", DavNamespaceUri);
pud.AppendChild(set);
var prop = inputDoc.CreateElement(null, "prop", DavNamespaceUri);
set.AppendChild(prop);
AddProperty(prop, "Win32FileAttributes", MsNamespaceUri, ((int)resource.Attributes).ToHex());
if (resource.CreationTimeUtc != DateTime.MinValue)
{
AddProperty(prop, "Win32CreationTime", MsNamespaceUri, resource.CreationTimeUtc);
}
if (resource.LastWriteTimeUtc != DateTime.MinValue)
{
AddProperty(prop, "Win32LastModifiedTime", MsNamespaceUri, resource.LastWriteTimeUtc);
}
try
{
xml = client.UploadString(uri, "PROPPATCH", inputDoc.OuterXml);
}
catch (Exception e)
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on PROPPATCH " + uri + ": " + e.Message);
throw;
}
}
var doc = new XmlDocument();
if (!string.IsNullOrWhiteSpace(xml))
{
try
{
doc.LoadXml(xml);
}
catch (Exception e)
{
context.AddError(e);
context.Log(TraceLevel.Error, "Error on LoadXml " + uri + ": " + e.Message);
throw;
}
}
}
}