Smugmug web service ported to O2 : Host authentication required

Thanh Trung Dinh dinhthanhtrung1996 at
Thu Jun 7 19:39:04 BST 2018

Hi Gilles,

Currently, I finished main functionalities of those needed to be ported to
O2 for Smugmug and Google. For Facebook, I think that I have finished all.
In fact, those new implementations worked with my tests. I still have to do
the app review on Facebook, so that digiKam can be used out of developer
mode. Besides, there are many things that I want to change on the interface
for the next step, the factorization part, so I do thing that beta stage is
really necessary.

Now, I am finishing codes for Smugmug and Google. I plan to run the static
analyzers this weekend to check my codes. So, is it possible that
back-porting my branch to master is on Sunday afternoon, so that I will
have enough time to accomplish my part? I really want to see user feedbacks
for new O2 implementations.


On Thu, Jun 7, 2018 at 4:32 PM, Gilles Caulier <caulier.gilles at>

> Hi Thanh,
> We have the second student working on the manual icon-view sorting project
> who advance well and have completed a first stage of the project as the
> code is typically read for testing as beta by end users.
> We plan to release an official 6.0.0-beta1 version in a near future, with
> a back-port from the student development branch to master.
> The goal is to provide an official test version with a release
> announcement including new feature to test, and of course to catch user
> feedback quickly in goal to stabilize new implementations.
> What do you think about your project ? Some O2 implementations can be
> ready for a beta stage ? Of course, this will include to back-port current
> code from your branch to master.
> Best
> Gilles
> 2018-06-06 0:15 GMT+02:00 Thanh Trung Dinh <dinhthanhtrung1996 at>:
>> Hi,
>> I finally figured out why I got this error. I post on forum so that if
>> anyone working with O2 and smugmug api later won't waste too much time.
>> I found out that I had tried to create a request with some parameters, so
>> I used O1::createRequestParameters to add those parameters to the request
>> and sign it. However, I forgot to add the request to the url itself.
>> According to a post I found on Smugmug forum, when a request cannot be
>> parsed because of something relating to oauth, it will be returned with
>> error "Authentication required", and that explains why I didn't get this
>> error when trying to make a normal GET request (without any OAuth1
>> parameters) to a public endpoint. So, that's it - the root cause of this
>> problem.
>> Thanh.
>> On Sun, Jun 3, 2018 at 9:52 PM, Thanh Trung Dinh <
>> dinhthanhtrung1996 at> wrote:
>>> Hi Maik,
>>> In fact, I added those lines and nickName is not always empty. In
>>> core/tests/webservices/smugmug.cpp
>>> <>,
>>> I added a command line option for login with nickname. When you run
>>> standalone test for smugmug with --login <nickname>, the nickname will be
>>> propagated when the login page is opened, so that I can get the nickName
>>> from user. In fact, It came from my misunderstanding. At that time, I had
>>> succeeded with authentication, but when I tried to get current user info
>>> from endpoint /api/v2!authuser (reference here
>>> <>), I got the
>>> same error of "authentication required" that I mentioned above. I had
>>> misunderstood that there was problem with that endpoint, so in order to use
>>> other APIs, I had to have nickname (at least), so I added that command line
>>> option. However, later I found out that even with nickname, I still got the
>>> same error when I tried to POST something via APIs. I finally figured out
>>> that these endpoints (those I succeeded with GET) are public, so no need
>>> for access token, and the problem still remains with endpoints needing
>>> token (/api/v2!authuser is one of them). Therefore, it must be problem with
>>> including auth token to the request.
>>> I attache here a patch with my latest modifications so that you can test
>>> it.
>>> Thanh.
>>> On Sun, Jun 3, 2018 at 8:13 PM, Maik Qualmann <metzpinguin at>
>>> wrote:
>>>> Hi Thanh,
>>>> Look smugwindow.cpp: 232 the nickName is always empty. Therefore your
>>>> login
>>>> function will never be executed. I think login with nickname does not
>>>> exist
>>>> anymore, so the dialog for entering email and password can be removed
>>>> as well.
>>>> The LINK to Smugmug then works through the website, but the return Json
>>>> code
>>>> has changed.
>>>> Maik
>>>> Am Samstag, 2. Juni 2018, 23:49:42 CEST schrieb Thanh Trung Dinh:
>>>> > Hi everyone,
>>>> >
>>>> > I'm porting digiKam web services with library O2, qt library for
>>>> OAuth.
>>>> > Working on Smugmug, I'm stuck with an error that I didn't understand.
>>>> >
>>>> > Smugmug uses OAuth 1.0 as authentication method, like Flickr, so I
>>>> used same
>>>> > methods to login, get user data, post photos, etc. In fact, I can
>>>> login and
>>>> > get access token using O2 methods. I also verified that the token I
>>>> got is
>>>> > the right one. However, whenever I tried to use that token to get/post
>>>> > something, QNetworkReply returns with error 204
>>>> > (AuthenticationRequiredError) and error message : "Host authentication
>>>> > required". Besides, Smugmug has endpoints that don't require token to
>>>> access
>>>> > (e.g GET /api/v2/user/<nickname>). So when I tried normal GET method
>>>> of
>>>> > QNetworkManager it worked, but when I used specific method for GET in
>>>> O2
>>>> > (which prepares token and other necessary headers in the url
>>>> request), that
>>>> > error appeared,
>>>> >
>>>> > Did anyone see this message error when working with authentication
>>>> before? I
>>>> > really appreciate any help and guide, since I am really stuck here.
>>>> >
>>>> > Thanks,
>>>> >
>>>> > Thanh-Trung Dinh
>>>> >
>>>> >
>>>> >
>>>> > --
>>>> > Sent from: http://digikam.1695700.n4.nabb
>>> --
>>> Mr. Thanh-Trung Dinh
>>> Université de Technologie de Compiègne (UTC) - France
>>> Tel: +33 7 53 68 20 29
>> --
>> Mr. Thanh-Trung Dinh
>> Université de Technologie de Compiègne (UTC) - France
>> Tel: +33 7 53 68 20 29

Mr. Thanh-Trung Dinh
Université de Technologie de Compiègne (UTC) - France
Tel: +33 7 53 68 20 29
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