I am attempting to build a webapp using Vue for the frontend and Flask for the backend that reads in the users Gmail emails.
Desired functionality:
User clicks a button to "Link Gmail Account" on the frontend
User is authenticated with gmail Oauth2 and confirms. Once confirmed, they redirect back to the page they were on
Once the user confirms, the backend queries gmail to get all of the users emails and returns the data to the frontend
I have been trying to use https://developers.google.com/gmail/api/quickstart/python as a starting point, but I cannot authenticate the user -- I keep getting a redirect uri mistmatch error with a random port (I am doing this locally so have set the redirect uri to be the localhost port where I access my project).
I think I am doing something fundamentally wrong or not using the Gmail API in the correct way, but have searched all over google and youtube to no avail.
Specific things that I think could be causing an issue:
What is the best overall strategy to implement this? Should I use the Gmail API in Python or Javascript? Right now, the use clicks the "Link Account" button which calls an API in my backend which then runs the code in the Python Quickstart guide.
What kind of google project should I set up? I currently have my credentials configured for a "web application"
What should I put as the redirect uri? I am using localhost but am unsure exactly what to put here (I have tried http://localhost, http://localhost:5000, http://localhost:5000/, http://localhost:5000/emails [this is the url I want them to return to]). No matter what I put, I keep getting a redirect uri mismatch and it says the uri it is looking for is http://localhost:[random port]/
I would appreciate any help on how to approach achieving this. Thank you!
Depending on what you are going to use Gmail API for, you must select the device or category. In your case, as it is a website it should be set to "Web Application".
Also, you should be using the following redirect URI: http://localhost/emails/. You should not include the port number and you should be using trailing slashes (adding the last / at the end). Note that the redirect URI you set up in your backend must be an exact match of the one you have set up in your Credentials Page. Also please note that it might take some minutes to update this URI.
Moreover, this is a guide on how to create a Sign In button that will authorise your users that I believe will be useful for you.
Related
In my Pinterest app I have set the Redirect URI to https://my.site.com/pinterest/callback. When doing the redirection after authentication back to my site I append a sessionid so the query becomes https://my.site.com/pinterest/callback?sessionid=<string>. This doesn't seem to work as I get
The provided redirect_uri https://my.site.com/pinterest/callback?sessionId=YA6udv2FrdjjV8juij3U5oIBBP6RoEQWWUFNzSHKaHGGf3jRq10uJ2A0-R-eYB8LLwiBTbESEdGzMY0fhYI8d7gOe3kOoPuPS6c-mowaaJBDv0J8D2I does not match any of the registered redirect URIs."
In other apis like the Instagram one this is possible. Can anyone help with this? Thanks a bunch!
I have been stucking with this for two days. Basically, Pinterest doesn't support custom parameters like other websites do, for Pinterest you need to provide the EXACT callback url and it has to use https not http, and if you need to pass custom parameters they should be in state parameter.
From Pinterest docs
state: A value you define. This can be used to make sure that the redirect back to your site or app wasn’t spoofed.
See Authentication section at https://developers.pinterest.com/docs/api/overview/
From Google Developer Console page, it explains the meaning of "Google Redirect URI" is :
Determines where the response is sent. The value of this parameter
must exactly match one of the values registered in the APIs Console
(including the http or https schemes, case, and trailing '/').
Not sure, whether this explanation is same as my think or not:
On my app (web application), it allow user to sign-in via Google (Assume, I registered a Google project with ClientID/secrete configured on my web-app, and on Google COnsole page the redirectURI is "http://bbc.co.uk" ).
After I login to Google successfully by my Google account, my Web-app login page will be redirected to "http://bbc.co.uk" as on Google RedirectURI ?
That last sentence is a bit ambiguous. A better description is:
After I login to my Google Account successfully with my Google
credentials, Google will redirect my browser back to
Redirect URI http://bbc.co.uk that is registered for the web app in the Google > API Console.
Just to be sure: this means that the Redirect URI should be part of your web app. It is not actually Google's Redirect URI but it is the Redirect URI that you've configured in the Google API Console for your web app.
Let me see if i cant explain this in a different way.
What would happen if you didn't have a redirect URI?
If you go to the Developer console and create a Client ID for native application by default the redirect URI
This will redirect the Authentication back to where ever it was request from. In the case of native installed applications this is needed because there is no way to know where the user is that has installed the application.
Lets look at this in action
Request authentication:
https://accounts.google.com/o/oauth2/auth?client_id={clientid}.apps.googleusercontent.com&redirect_uri=urn:ietf:wg:oauth:2.0:oob&scope=https://www.googleapis.com/auth/analytics.readonly&response_type=code
If you place the above line in a web browser the user will see something like this
Assuming they select ok then they get this displayed back at them.
That is the Authentication code, not to be confused with the access token. This is just the first step. Once your application has the Authentication code it can then exchanged that for a refresh token and a access token. Most client library handle this step internally. You and your users never see this Authentication code.
Back Redirect URI:
In the case if a web application your web application needs to be able to get a hold of that authentication code. Now I probably shouldn't be telling you this but you could just use a native application client in your web application and it will work. Why because the authentication server will just return the Authentication code back to where ever it was that requested it. For security reasons this is probably a bad practice.
So what do you need to place in the redirect uri. It is the file that you have ready to handle this authentication code. Normally its just the same as the login page, but you can have several. Just put each of them on separate lines.
http://localhost/login.php
http://www.daimto.com/login.php
I like to do this because then it works when i am testing locally vs when its up on the server.
I think the wording "Determines where the response is sent" confuses a lot of beginners as it implies that Google will somehow call that URL directly. Then the word "redirect" leads people to confuse the URL with the page of the app that the user will get to once he's authenticated.
http://bbc.co.uk is definitely NOT the redirect URL. A redirect URL would normally look like https://myapp.com/servlet_or_php_that_i_wrote_to_process_tokens.php
Google will "call" servlet_or_php_that_i_wrote_to_process_tokens.php by redirecting the browser to it. Once servlet_or_php_that_i_wrote_to_process_tokens.php as done whatever is needed with the token, it will then issue its own redirect to (say) bbc.co.uk
I've been looking for this answer and the other pages didn't help me.
I'm trying to use the google drive api for php. I am trying to test on my local environment and receive this error.
Error: redirect_uri_mismatch
The redirect URI in the request: urn:ietf:wg:oauth:2.0:oob did not match a registered redirect URI
Request Details
scope=https://www.googleapis.com/auth/drive
response_type=code
redirect_uri=urn:ietf:wg:oauth:2.0:oob
access_type=offline
display=page
prompt=consent
client_id=735129338633-0epug8n80jsg0t50ijn7our4a661nnk6.apps.googleusercontent.com
Here is the page for the api:
The url is in
localhost:8888/Spreadsheets/driver.php
What am I doing wrong?
Looks like the current Google OAuth2 integration requires enabling
Contacts API
Google+ API
from the Google Developers Console for the associated Project. In my log I noticed errors liek 403, Access Not Configured. Please use ....
The redirect URI (where the response is returned to) has to be correct and exactly as you registered in the APIs console, and the error is indicating that you haven't done that or you haven't done it correctly.
To get the redirect URI from console:
Go to the console for your project and look under API Access.
Open Credentials section (in left side)
You should see your client ID & secret there, along with there is a
list of redirect URIs. If you want to change it or it was wrong,
click edit settings and modify.
Even if your redirect uri is properly set in the console, a lot of times, when you've recently changed settings in the google dev console, it will still tell you there's a redirect mismatch. It's a surprisingly common occurrence.
You can try...
Waiting; some have had luck with this, indicating that google takes some amount of time to register recent changes.
If you don't mind reconfiguring your app, creating a new client id in the google dev console tends to fix this problem with consistent results.
in my android application I want to use google places API. I logon to code.google.com/apis/console. When I'm trying to enabling access to places API it asks for Company url and organization. I don't have any website, So how do I use it?
I asked my friends, and give their url and name. Now it will show error message as Invalid website url. Please help me to enable the places API service
Not sure if you still care, but you probably just left out "http://" before the URL. This causes it to say "invalid website URL". Very annoying, I know.
The problem is in the URL. I omit the "http://" before the URL. Now it solved my issue
I am trying to add OAuth athentication with to access YouTube, but how do I add localhost as domain?
For example on domain registration page here, I want to use localhost, since I am developing this application locally.
Please help me or suggest me alternative ways
Thank you
P.S. I also added this question on https://webapps.stackexchange.com/, but not sure about community activity there so please ignore
Obviously you can't register 'localhost' for authentication since it is merely an alias. If you want to use OAuth with any Google service, you'll have to have a domain. If you're developing a desktop app, there is a workaround (this may actually work for all but I didn't try):
You can actually sign your OAuth requests without registering your domain with Google by creating a signature using HMAC-SHA1, a consumer key of "anonymous" and a consumer secret of "anonymous". Just make sure you have the appropriate signature base string for your requests.
http://code.google.com/apis/accounts/docs/OAuth_ref.html#SigningOAuth
On the page in Google's APIs console where you provide redirect URIs for your app, you can use localhost. Or you can give another name to localhost in your /etc/hosts file like this:
127.0.0.1 localhost myname.madeupdomain.net