public IActionResult ProcessLock(string id)
{
log.Info($"ProcessLock file id: {id}, WopiOverrideHeader: {WopiOverrideHeader}");
string oldLock = Request.Headers[WopiHeaders.OldLock];
string newLock = Request.Headers[WopiHeaders.Lock];
lock (FileLockHelper.LockStorage)
{
bool lockAcquired = FileLockHelper.TryGetLock(id, out var existingLock);
log.Info($"ProcessLock lockAcquired: {lockAcquired}, oldLock: {oldLock}, newLock: {newLock}");
switch (WopiOverrideHeader)
{
case "GET_LOCK":
if (lockAcquired)
{
Response.Headers[WopiHeaders.Lock] = existingLock.Lock;
}
return(new OkResult());
case "LOCK":
case "PUT":
if (string.IsNullOrEmpty(oldLock))
{
// Lock / put
if (lockAcquired)
{
log.Info($"ProcessLock existingLock: {existingLock.Lock}");
if (existingLock.Lock == newLock)
{
// File is currently locked and the lock ids match, refresh lock
FileLockHelper.SetLock(id, newLock, _hostingEnvironment.ContentRootPath);
return(new OkResult());
}
else
{
// There is a valid existing lock on the file
return(ReturnLockMismatch(Response, existingLock.Lock));
}
}
else
{
// The file is not currently locked, create and store new lock information
FileLockHelper.SetLock(id, newLock, _hostingEnvironment.ContentRootPath);
return(new OkResult());
}
}
else
{
// Unlock and relock (http://wopi.readthedocs.io/projects/wopirest/en/latest/files/UnlockAndRelock.html)
if (lockAcquired)
{
log.Info($"ProcessLock existingLock: {existingLock.Lock}");
if (existingLock.Lock == oldLock)
{
// Replace the existing lock with the new one
FileLockHelper.SetLock(id, newLock, _hostingEnvironment.ContentRootPath);
return(new OkResult());
}
else
{
// The existing lock doesn't match the requested one. Return a lock mismatch error along with the current lock
return(ReturnLockMismatch(Response, existingLock.Lock));
}
}
else
{
// The requested lock does not exist which should result in a lock mismatch error.
return(ReturnLockMismatch(Response, reason: "File not locked"));
}
}
case "UNLOCK":
if (lockAcquired)
{
if (existingLock.Lock == newLock)
{
// Remove valid lock
FileLockHelper.SetLock(id, null, _hostingEnvironment.ContentRootPath);
log.Info($"ProcessLock UNLOCK: OkResult");
return(new OkResult());
}
else
{
// The existing lock doesn't match the requested one. Return a lock mismatch error along with the current lock
return(ReturnLockMismatch(Response, existingLock.Lock));
}
}
else
{
// The requested lock does not exist.
return(ReturnLockMismatch(Response, reason: "File not locked"));
}
case "REFRESH_LOCK":
if (lockAcquired)
{
if (existingLock.Lock == newLock)
{
// Extend the lock timeout
FileLockHelper.SetLock(id, newLock, _hostingEnvironment.ContentRootPath);
return(new OkResult());
}
else
{
// The existing lock doesn't match the requested one. Return a lock mismatch error along with the current lock
return(ReturnLockMismatch(Response, existingLock.Lock));
}
}
else
{
// The requested lock does not exist. That's also a lock mismatch error.
return(ReturnLockMismatch(Response, reason: "File not locked"));
}
}
}
return(new OkResult());
}
