Dropbox is switching to short-lived access_token OAuth. This commit adapts Cloud::DropboxStorage to use refresh_token similarly to how other Storages do: by introducing a DropboxTokenRefresher.
It is used instead of plain CurlJsonRequest. It just checks if received JSON has access_token-related error and tries to refresh it, then repeats the original request transparently for the caller. If no such errors found, it just passes the info to the caller.
- StorageWizardDialog is removed, along with bmps it was using;
- EditTextWidget now accepts custom font in constructor;
- ScrollContainer scrollbar now jumps to top when content height changes
so it's "overscrolled";
- IndexPageHandler now does not awaits for `code` GET-parameter, as
local webserver is no longer used to connect Storages;
- CloudManager and all corresponding Storages are updated to support
disconnecting and to notify about successful connection.
While refreshing access_token, some cloud providers also pass a new
refresh_token. Google Drive does not, and accepts the same refresh_token
next time. These changes allow this to happen.
It now keeps track of how many Requests are running.
To achieve that, we had to pass a callback to ConnectionManager, so each
Request has a callback paired with it. If that's one of Storage's
Requests, it has a callback, which would decrease a counter. When
Storage adds a Request, it also increases a counter and passes that
callback. Callback is called by ConnMan when Request is deleted.
isWorking() returns true if there is at least one Request running.
DownloadRequest and FolderDownloadRequest are using other Storage's
methods. Thus, download() and downloadFolder() could be implemented in
base Storage class.
As it uses SavesSyncRequest and this request is using Storage's
upload(), download() and listDirectory(), there is no need to make
storage-dependent version of that request and so method could be
implemented in base Storage.
It actually works fine, but small Storage::savesDirectoryPath() was
added, because Dropbox's directories must start with a slash, and
OneDrive's directories must not.
Saves sync tested and it works fine with OneDrive.
ConnectionManager now storages Request * (not generates ids for it),
Requests have control on their RequestState, RequestIdPair is now called
Response and storages Request * with some response together.
All related classes are changed to use it in more clean and
understandable way.
Request, RequestState and Response are carefully commented/documented.
Well, it takes two API calls instead of one now, but there are no
problems with expired token because of it.
This commit changes Storage::streamFile() to pass NetworkReadStream *
through callback.
Can be used with Callback<T> (means it's still type safe). It's used to
pass not only Request id to user's callback, but also a value user
wanted.
void *data field is removed from RequestInfo.
It reads the passed NetworkReadStream and prints its contents onto
console (for now). It would be writing contents into file.
To simplify work with raw NetworkReadStream there is a new CurlRequest.
It basically does nothing, but as ConnMan handles transfers only if
there is an active Request, you need some Request to get
NetworkReadStream working. Thus, there is a CurlRequest, which is active
until NetworkReadStream is completely read. CurlRequest also has useful
addHeader() and addPostField() methods in order to customize the request
easily. Use execute() method to get its NetworkReadStream.
DropboxStorage implements streamFile() and download() API methods. As
DownloadRequest is incomplete, it is not actually downloading a file,
though.
It doesn't support any "has_more", doesn't call user's callback and just
prints JSON instead of parsing in into an array of files.
I believe it would become DropboxListDirectoryRequest in the next
commit.
In this commit CloudManager starts supporting multiple Storage. Now, in
its init() it loads all the Storages and determines the current one.
It now also has save() method. In that method all Storages are saved
with their new saveConfig() method.
CloudManager::save() not called from anywhere, though. The only one
Storage that could be added is DropboxStorage in case you have no
cloud-related config keys or you have no storages connected.
This commit also adds GlobalFunctionCallback, because it was needed in
order to replace plain C pointers to functions (which were used in
Request) into our object-oriented BaseCallback pointers.
These callbacks can call object's methods, not some global C functions.
DropboxStorage::info2() and DropboxStorage::infoMethodCallback()
demonstrate the idea.
Originally, I intended to add Storage API, StorageFile and StorageInfo
stubs. When I tried to implement a simple info() call, I ended up fixing
Request to contain some pointer field and all callbacks to have Request*
parameter. And, now I have to place callback pointer into Request. which
calls another callback.
And, eventually, these "simple" callbacks would again require another
pointer (to some caller class).
