/// <summary>
/// Processes a PutUserInfo request
/// </summary>
/// <remarks>
/// For full documentation on PutUserInfo, see https://wopi.readthedocs.org/projects/wopirest/en/latest/files/PutUserInfo.html
/// </remarks>
private async static Task <HttpResponseMessage> PutUserInfo(this HttpContext context, FileModel file)
{
// Set and save the UserInfo on the file
var stream = context.Request.InputStream;
var bytes = new byte[stream.Length];
await stream.ReadAsync(bytes, 0, (int)stream.Length);
file.UserInfo = System.Text.Encoding.UTF8.GetString(bytes);
// Update the file in DocumentDB
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// Return success
return(returnStatus(HttpStatusCode.OK, "Success"));
}
/// <summary>
/// Processes a RenameFile request
/// </summary>
/// <remarks>
/// For full documentation on RenameFile, see https://wopi.readthedocs.org/projects/wopirest/en/latest/files/RenameFile.html
/// </remarks>
private async static Task <HttpResponseMessage> RenameFile(this HttpContext context, FileModel file)
{
// Get the Lock value passed in on the request
string requestLock = context.Request.Headers[WopiRequestHeaders.LOCK];
// Make sure the X-WOPI-RequestedName header is included
if (context.Request.Headers[WopiRequestHeaders.REQUESTED_NAME] != null)
{
// Get the new file name
var newFileName = context.Request.Headers[WopiRequestHeaders.REQUESTED_NAME];
// Ensure the file isn't locked
if (String.IsNullOrEmpty(file.LockValue) ||
(file.LockExpires != null &&
file.LockExpires < DateTime.Now))
{
// Update the file with a LockValue and LockExpiration
file.LockValue = requestLock;
file.LockExpires = DateTime.Now.AddMinutes(30);
file.BaseFileName = newFileName;
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// Return success 200
return(returnStatus(HttpStatusCode.OK, "Success"));
}
else if (file.LockValue == requestLock)
{
// File lock matches existing lock, so we can change the name
file.LockExpires = DateTime.Now.AddMinutes(30);
file.BaseFileName = newFileName;
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// Return success 200
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
return(returnStatus(HttpStatusCode.OK, "Success"));
}
else
{
// The file is locked by someone else...return mismatch
return(context.returnLockMismatch(file.LockValue, String.Format("File locked by {0}", file.LockValue)));
}
}
else
{
// X-WOPI-RequestedName header wasn't included
return(returnStatus(HttpStatusCode.BadRequest, "X-WOPI-RequestedName header wasn't included in request"));
}
}
/// <summary>
/// Processes a UnlockAndRelock request
/// </summary>
/// <remarks>
/// For full documentation on UnlockAndRelock, see https://wopi.readthedocs.org/projects/wopirest/en/latest/files/UnlockAndRelock.html
/// </remarks>
private async static Task <HttpResponseMessage> UnlockAndRelock(this HttpContext context, FileModel file)
{
// Get the Lock and OldLock values passed in on the request
string requestLock = context.Request.Headers[WopiRequestHeaders.LOCK];
string requestOldLock = context.Request.Headers[WopiRequestHeaders.OLD_LOCK];
// Ensure the file has a valid lock
if (String.IsNullOrEmpty(file.LockValue))
{
// File isn't locked...pass empty Lock in mismatch response
return(context.returnLockMismatch(String.Empty, "File isn't locked"));
}
else if (file.LockExpires != null && file.LockExpires < DateTime.Now)
{
// File lock expired, so clear it out
file.LockValue = null;
file.LockExpires = null;
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// File isn't locked...pass empty Lock in mismatch response
return(context.returnLockMismatch(String.Empty, "File isn't locked"));
}
else if (requestOldLock != file.LockValue)
{
// File lock mismatch...pass Lock in mismatch response
return(context.returnLockMismatch(file.LockValue, "Lock mismatch"));
}
else
{
// Update the file with a LockValue and LockExpiration
file.LockValue = requestLock;
file.LockExpires = DateTime.Now.AddMinutes(30);
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// Return success 200
return(returnStatus(HttpStatusCode.OK, "Success"));
}
}
/// <summary>
/// Processes a PutRelativeFile request
/// </summary>
/// <remarks>
/// For full documentation on PutRelativeFile, see https://wopi.readthedocs.org/projects/wopirest/en/latest/files/PutRelativeFile.html
/// </remarks>
private async static Task <HttpResponseMessage> PutRelativeFile(this HttpContext context, DetailedFileModel file, List <WopiAction> actions)
{
// Determine the specific mode
if (context.Request.Headers[WopiRequestHeaders.RELATIVE_TARGET] != null &&
context.Request.Headers[WopiRequestHeaders.SUGGESTED_TARGET] != null)
{
// Theses headers are mutually exclusive, so we should return a 501 Not Implemented
return(returnStatus(HttpStatusCode.NotImplemented, "Both RELATIVE_TARGET and SUGGESTED_TARGET were present"));
}
else if (context.Request.Headers[WopiRequestHeaders.RELATIVE_TARGET] != null ||
context.Request.Headers[WopiRequestHeaders.SUGGESTED_TARGET] != null)
{
string fileName = "";
if (context.Request.Headers[WopiRequestHeaders.RELATIVE_TARGET] != null)
{
// Specific mode...use the exact filename
fileName = context.Request.Headers[WopiRequestHeaders.RELATIVE_TARGET];
}
else
{
// Suggested mode...might just be an extension
fileName = context.Request.Headers[WopiRequestHeaders.RELATIVE_TARGET];
if (fileName.IndexOf('.') == 0)
{
fileName = file.BaseFileName.Substring(0, file.BaseFileName.LastIndexOf('.')) + fileName;
}
}
// Create the file entity
DetailedFileModel newFile = new DetailedFileModel()
{
id = Guid.NewGuid(),
OwnerId = file.OwnerId,
BaseFileName = fileName,
Size = context.Request.InputStream.Length,
Container = file.Container,
Version = 1
};
// First stream the file into blob storage
var stream = context.Request.InputStream;
var bytes = new byte[stream.Length];
await stream.ReadAsync(bytes, 0, (int)stream.Length);
var id = await Utils.AzureStorageUtil.UploadFile(newFile.id.ToString(), newFile.Container, bytes);
// Write the details into documentDB
await DocumentDBRepository <FileModel> .CreateItemAsync("Files", (FileModel)newFile);
// Get access token for the new file
WopiSecurity security = new WopiSecurity();
var token = security.GenerateToken(newFile.OwnerId, newFile.Container, newFile.id.ToString());
var tokenStr = security.WriteToken(token);
// Prepare the Json response
string json = String.Format("{ 'Name': '{0}, 'Url': 'https://{1}/wopi/files/{2}?access_token={3}'",
newFile.BaseFileName, context.Request.Url.Authority, newFile.id.ToString(), tokenStr);
// Add the optional properties to response if applicable (HostViewUrl, HostEditUrl)
var fileExt = newFile.BaseFileName.Substring(newFile.BaseFileName.LastIndexOf('.') + 1).ToLower();
var view = actions.FirstOrDefault(i => i.ext == fileExt && i.name == "view");
if (view != null)
{
json += String.Format(", 'HostViewUrl': '{0}'", WopiUtil.GetActionUrl(view, newFile, context.Request.Url.Authority));
}
var edit = actions.FirstOrDefault(i => i.ext == fileExt && i.name == "edit");
if (edit != null)
{
json += String.Format(", 'HostEditUrl': '{0}'", WopiUtil.GetActionUrl(edit, newFile, context.Request.Url.Authority));
}
json += " }";
// Write the response and return a success 200
var response = returnStatus(HttpStatusCode.OK, "Success");
response.Content = new StringContent(json);
return(response);
}
else
{
return(returnStatus(HttpStatusCode.BadRequest, "PutRelativeFile mode was not provided in the request"));
}
}
/// <summary>
/// Processes a PutFile request
/// </summary>
/// <remarks>
/// For full documentation on PutFile, see https://wopi.readthedocs.org/projects/wopirest/en/latest/files/PutFile.html
/// </remarks>
private async static Task <HttpResponseMessage> PutFile(this HttpContext context, FileModel file)
{
// Get the Lock value passed in on the request
string requestLock = context.Request.Headers[WopiRequestHeaders.LOCK];
// Ensure the file has a valid lock
if (String.IsNullOrEmpty(file.LockValue))
{
// If the file is 0 bytes, this is document creation
if (context.Request.InputStream.Length == 0)
{
// Update the file in blob storage
var bytes = new byte[context.Request.InputStream.Length];
context.Request.InputStream.Read(bytes, 0, bytes.Length);
file.Size = bytes.Length;
await AzureStorageUtil.UploadFile(file.id.ToString(), file.Container, bytes);
// Update version
file.Version++;
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// Return success 200
return(returnStatus(HttpStatusCode.OK, "Success"));
}
else
{
// File isn't locked...pass empty Lock in mismatch response
return(context.returnLockMismatch(String.Empty, "File isn't locked"));
}
}
else if (file.LockExpires != null && file.LockExpires < DateTime.Now)
{
// File lock expired, so clear it out
file.LockValue = null;
file.LockExpires = null;
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// File isn't locked...pass empty Lock in mismatch response
return(context.returnLockMismatch(String.Empty, "File isn't locked"));
}
else if (requestLock != file.LockValue)
{
// File lock mismatch...pass Lock in mismatch response
return(context.returnLockMismatch(file.LockValue, "Lock mismatch"));
}
else
{
// Update the file in blob storage
var bytes = new byte[context.Request.InputStream.Length];
context.Request.InputStream.Read(bytes, 0, bytes.Length);
file.Size = bytes.Length;
await AzureStorageUtil.UploadFile(file.id.ToString(), file.Container, bytes);
// Update version
file.Version++;
await DocumentDBRepository <FileModel> .UpdateItemAsync("Files", file.id.ToString(), (FileModel)file);
// Return success 200
return(returnStatus(HttpStatusCode.OK, "Success"));
}
}
/// <summary>
/// Processes a WOPI request using the HttpContext of the APIController
/// </summary>
public async static Task <HttpResponseMessage> ProcessWopiRequest(this HttpContext context)
{
// Parse the request
var request = ParseRequest(context.Request);
HttpResponseMessage response = null;
try
{
// Lookup the file in the database
var itemId = new Guid(request.Id);
var file = DocumentDBRepository <DetailedFileModel> .GetItem("Files", i => i.id == itemId);
// Check for null file
if (file == null)
{
response = returnStatus(HttpStatusCode.NotFound, "File Unknown/User Unauthorized");
}
else
{
// Validate WOPI Proof (ie - ensure request came from Office Online)
if (await WopiUtil.ValidateWopiProof(context))
{
// Get discovery information
var fileExt = file.BaseFileName.Substring(file.BaseFileName.LastIndexOf('.') + 1).ToLower();
var actions = await WopiUtil.GetDiscoveryInfo();
// Augments the file with additional properties CloseUrl, HostViewUrl, HostEditUrl
file.CloseUrl = String.Format("https://{0}", context.Request.Url.Authority);
var view = actions.FirstOrDefault(i => i.ext == fileExt && i.name == "view");
if (view != null)
{
file.HostViewUrl = WopiUtil.GetActionUrl(view, file, context.Request.Url.Authority);
}
var edit = actions.FirstOrDefault(i => i.ext == fileExt && i.name == "edit");
if (edit != null)
{
file.HostEditUrl = WopiUtil.GetActionUrl(edit, file, context.Request.Url.Authority);
}
// Get the user from the token (token is already validated)
file.UserId = WopiSecurity.GetUserFromToken(request.AccessToken);
// Call the appropriate handler for the WOPI request we received
switch (request.RequestType)
{
case WopiRequestType.CheckFileInfo:
response = context.CheckFileInfo(file);
break;
case WopiRequestType.GetFile:
response = await context.GetFile(file);
break;
case WopiRequestType.Lock:
response = await context.Lock(file);
break;
case WopiRequestType.GetLock:
response = await context.GetLock(file);
break;
case WopiRequestType.RefreshLock:
response = await context.RefreshLock(file);
break;
case WopiRequestType.Unlock:
response = await context.Unlock(file);
break;
case WopiRequestType.UnlockAndRelock:
response = await context.UnlockAndRelock(file);
break;
case WopiRequestType.PutFile:
response = await context.PutFile(file);
break;
case WopiRequestType.PutRelativeFile:
response = await context.PutRelativeFile(file, actions);
break;
case WopiRequestType.RenameFile:
response = await context.RenameFile(file);
break;
case WopiRequestType.PutUserInfo:
response = await context.PutUserInfo(file);
break;
default:
response = returnStatus(HttpStatusCode.NotImplemented, "Unsupported");
break;
}
}
else
{
// Proof validation failed...return 500
response = returnStatus(HttpStatusCode.InternalServerError, "Server Error");
}
}
}
catch (Exception)
{
// An unknown exception occurred...return 500
response = returnStatus(HttpStatusCode.InternalServerError, "Server Error");
}
return(response);
}
