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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.
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touch() and isSyncing() are not needed.
remove() is not needed too, but it could be used in the future.
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DownloadRequest and FolderDownloadRequest are using other Storage's
methods. Thus, download() and downloadFolder() could be implemented in
base Storage class.
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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.
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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.
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Doesn't support server's requested ranges yet.
Commit also adds some PUT-related code in NetworkReadStream and
CurlRequest.
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Added ErrorResponse and ErrorCallback. Each Request now has an
ErrorCallback, which should be called instead of usual callback in case
of failure.
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It contains flags to indicate whether Request was interrupted or failed,
so dependent Requests may see that list is incomplete.
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It contains not just "success" flag, but also "file" struct, so the
caller can find out some information about uploaded file - like
timestamp.
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Just uses FolderDownloadRequest the way DropboxStorage does.
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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.
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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.
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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.
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(Upgrading ConnectionManager step by step.)
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Tested with .jpg file. Transfer complete, CRC-32 is the same.
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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.
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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.
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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.
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And do some minor cleanup work.
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Cleaned up all example code and old callbacks.
New Callback classes are introduced in "common/callback.h" and
documented.
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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).
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With ConnectionManager singleton one can start their Requests without
creating Storage instance. Moreover, Storage instance should contain
cloud API, not Requests-related handling and timer starting methods.
Thus, these methods were moved into ConnectionManager itself.
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This commit adds:
* ConfMan's new "cloud" domain;
* CloudManager's init() method, where it loads keys from "cloud" configs
domain;
* CurlJsonRequest's addHeader() and addPostField() methods;
* temporary Storage's printInfo() method;
* DropboxStorage's implementation of printInfo(), which is using access
token and user id;
* DropboxStorage's loadFromConfig() static method to load access token
and user id from configs and create a Storage instance with those;
* temporary DropboxStorage's authThroughConsole() static method, which
guides user through auth process from the console.
So, in CloudManager's init() implementation ScummVM checks that there is
"current_storage_type" key in "cloud" domain of configs, and loads
corresponding storage if there is such key.
If there is no such key, ScummVM offers user to auth with Dropbox.
That's done through console, and thus it's temporary (it also requires
restarting ScummVM twice and manually editing config.ini file).
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Now it is based on MemoryReadWriteStream, which is introduced by this
commit. This stream is using ring buffer and is dynamically increasing
its size when necessary.
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NetworkReadStream actually saves whole response in the memory now.
There is a pause mechanism in libcurl, but if libcurl is requesting
something compressed, it would have to uncompress data as it goes even
if we paused the request. Even though our own stream won't be notified
about this data when when "pause" the request, libcurl's own buffer
wound be expanding.
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Just fooling around with the example Request, but the idea works well.
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This commit introduces Common::CloudManager, which can be accessed from
OSystem.
The backend for this manager is Cloud::Manager (defined in
backends/cloud/manager.h). It should load all users storages from
configs and provide access to current Storage instance. For now it just
creates a new one.
Cloud::Storage (backends/cloud/storage.h) provides an API to interact
with cloud storage, for example, create new directory or sync files.
Right now it's not ready and has only two dummy methods: listDirectory()
and syncSaves().
There is Cloud::Dropbox::DropboxStorage backend
(backends/cloud/dropbox/dropboxstorage.h) for Cloud::Storage. Right now
it implements both listDirectory() and syncSaves() with starting timer
task and handling it by printing out some JSON examples.
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