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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 now actually read the "timestamps" file, loads and saves files as it
should, ignores Dropbox's "not_found" error.
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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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If file could be uploaded in one API call, no need to create a session
(which requires at least two calls: to start and then to finish it).
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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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I get 'warning: ISO C++98 does not support the '%lg' ms_printf format'
warning though.
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Plain char * is used instead of Common::String in DropboxStorage and
OneDriveStorage's KEY and SECRET.
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Uses Storage's listDirectory() and download() methods to download
contents.
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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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Type safety first.
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With new ConnectionManager upgrade Requests indicate that they are
finished with RequestInfo.state. No need to use handle() return value
anymore.
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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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ConnectionManager upgrade: it now contains a special struct for each
request, so you can access request status and data by request id.
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(Upgrading ConnectionManager step by step.)
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DumpFile::open() with createPath=true create would create the missing
directories from the path before opening a file. Thus, one can easily
create a file and avoid "can't open a file" error.
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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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Does multiple CurlJsonRequests while Dropbox returns "has_more" = true.
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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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It now contains a few useful methods to get name or quota usage.
DropboxStorage returns a finely filled StorageInfo.
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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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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.
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These callbacks can call object's methods, not some global C functions.
DropboxStorage::info2() and DropboxStorage::infoMethodCallback()
demonstrate the idea.
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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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Tried to compile these two last commits with GCC and found a few minor
problems.
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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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It's using MemoryWriteStreamDynamic instead of String and it prepares
raw byte contents of this stream for JSON::parse().
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Now we can do REST API request by creating CurlJsonRequest and waiting
for it to call our callback. Passed pointer is Common::JSONValue.
This commit also does some minor variable renaming fixes.
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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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CurlRequest uses own multi_handle, in which it creates an easy_handle to
make a request.
Every time `handle()` is called it checks whether request is complete
and, if it is, stops.
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It's not static anymore.
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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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