I'm seeking advice for a better solution for avoid data from being exposed in javascript. The following is sample code provided by DocuSign for call Clickwrap API. Is it possible to make this javascript call from C#?
<div id="ds-terms-of-service"></div>
<script src="https://demo.docusign.net/clickapi/sdk/latest/docusign-click.js"></script>
<script>docuSignClick.Clickwrap.render({
environment: 'https://demo.docusign.net',
accountId: 'c4b87cc4-0000-433f-8c6a-a52209d4942a',
clickwrapId: 'ba495cf9-1111-4b9e-9a99-be0357d683ff',
clientUserId: '1234'
'#ds-terms-of-service'
);
</script>
UPDATE: you can use this endpoint to retrieve a URL that's unique to the specific user that is agreeing to the clickwrap. That URL won't have any information that you don't want to expose. (the URL you get has a special unique token that can only be used for this particular user and does not expose anything else).
One approach is to get this information on the server when user interact with your app so it's not exposed directly on the source.
To see how this is done, you can look at the new MyClickwrap sample app. You can get the code downloaded (C#, .NET.Core) from GitHub to see how it was built
I'm at a total loss here. I believe I'm right in thinking there is no longer any JS API for twitter which just sucks hugely.
However I realise looking at this I could just use ajax and react to the responses from this:
https://dev.twitter.com/rest/reference/post/statuses/update
OAuth Signature Generator
Example Request POST
https://api.twitter.com/1.1/statuses/update.json?status=Maybe%20he%27ll%20finally%20find%20his%20keys.%20%23peterfalk
However when I post to that url I get the following:
{"errors":[{"code":215,"message":"Bad Authentication data."}]}
Bad Authentication data -> this is very self explanatory: Your Authentication is Bad; in other word, you are not authorized to use that API method.
Since you use POST method, make sure you set your APP access level to Read & Write.
Sign in to apps.twitter.com, and in the Applications Management page for your app, click the Permissions tab. There you can change your access level.
For further reading, please see this answer.
I'm trying to build a client-side application that allows people to login with their Instagram accounts. Problem is, I'm not sure if that's still possible.
I've coded a sample JavaScript after reading "Client-Side (Implicit) Authentication" section of their related docs.
I'm getting the following error:
{
"code": 400,
"error_type": "OAuthException",
"error_message": "JS login temporarily disabled"
}
From the error message I'm guessing it's not about my code but it's something on Instagram's side. Is there a way for me to do client-side login? Also, if I can't, what are my options?
Thanks.
I had similar issue and this is how I fixed it.
You have to uncheck the "Disable implicit OAuth:" by going to :
-> Manage Clients
-> Click edit on the app/webapp.
-> Uncheck - Disable implicit OAuth:
-> Update the settings and try to run it again by going to the link :
https://api.instagram.com/oauth/authorize/?client_id=CLIENT-ID&redirect_uri=REDIRECT-URI&response_type=token
In the link, replace the values that were provided to you and in the response_type, give value as token to get the access token and if you want to get the request code, just replace token with the code in the URL.
Hope this helps for you and for future viewers.. Good luck.. :)
Just unset the "Disable implicit OAuth:" in app settings.
So, it seems it's impossible to do JS login at the moment with Instagram.
But they still allow implicit redirects so the solution is to have a server to make a redirect to your client side application. You only need two endpoints. I've written a small Node.JS app for this which you can find here.
I had tried for the same,I think there are not still providing any api to login with Instagram credentials username and password,You can just authenticate your account via
https://api.instagram.com/oauth/authorize/?client_id=CLIENT-ID&redirect_uri=REDIRECT-URI&response_type=code
I am using the google auth but keep getting an origin mismatch. The project I am working has sub domains that are generated by the user. So for example there can be:
john.example.com
henry.example.com
larry.example.com
In my app settings I have one of my origins being http://*.example.com but I get an origin mismatch. Is there a way to solve this? Btw my code looks like this:
gapi.auth.authorize({
client_id : 'xxxxx.apps.googleusercontent.com',
scope : ['https://www.googleapis.com/auth/plus.me',
state: 'http://henry.example.com',
'https://www.googleapis.com/auth/userinfo.email', 'https://www.googleapis.com/auth/userinfo.profile'],
immediate : false
}, function(result) {
if (result != null) {
gapi.client.load('oath2', 'v2', function() {
console.log(gapi.client);
gapi.client.oauth2.userinfo.get().execute(function(resp) {
console.log(resp);
});
});
}
});
Hooray for useful yet unnecessary workarounds (thanks for complicating yourself into a corner Google)....
I was using Google Drive using the javascript api to open up the file picker, retrieve the file info/url and then download it using curl to my server. Once I finally realized that all my wildcard domains would have to be registered, I about had a stroke.
What I do now is the following (this is my use case, cater it to yours as you need to)
On the page that you are on, create an onclick event to open up a new window in a specific domain (https://googledrive.example.com/oauth/index.php?unique_token={some unique token}).
On the new popup I did all my google drive authentication, had a button to click which opened the file picker, then retrieved at least the metadata that I needed from the file. Then I stored the token (primary key), access_token, downloadurl and filename in my database (MySQL).
Back on step one's page, I created a setTimeout() loop that would run an ajax call every second with that same unique_token to check when it had been entered in the database. Once it finds it, I kill the loop and then retrieve the contents and do with them as I will (in this case I uploaded them through a separate upload script that uses curl to fetch the file).
This is obviously not the best method for handling this, but it's better than entering each and every subdomain into googles cloud console. I bet you can probably do this with googles server side oauth libraries they use, but my use case was a little complicated and I was cranky cause I was frustrated at the past 4 days I've spent on a silly little integration with google.
Wildcard origins are not supported, same for redirect URIs.
The fact that you can register a wildcard origin is a bug.
You can use the state parameter, but be very careful with that, make sure you don't create an open redirector (an endpoint that can redirect to any arbitrary URL).
I need users to be able to post data from a single page browser application (SPA) to me, but I can't put server-side code on the host.
Is there a web service that I can use for this? I looked at Amazon SQS (simple queue service) but I can't call their REST APIs from within the browser due to cross origin policy.
I favour ease of development over robustness right now, so even just receiving an email would be fine. I'm not sure that the site is even going to catch on. If it does, then I'll develop a server-side component and move hosts.
Not only there are Web Services, but nowadays there are robust systems that provide a way to server-side some logic on your applications. They are called BaaS or Backend as a Service providers, usually to provide some backbone to your front end applications.
Although they have multiple uses, I'm going to list the most common in my opinion:
For mobile applications - Instead of having to learn an API for each device you code to, you can use an standard platform to store logic and data for your application.
For prototyping - If you want to create a slick application, but you don't want to code all the backend logic for the data -less dealing with all the operations and system administration that represents-, through a BaaS provider you only need good Front End skills to code the simplest CRUD applications you can imagine. Some BaaS even allow you to bind some Reduce algorithms to calls your perform to their API.
For web applications - When PaaS (Platform as a Service) came to town to ease the job for Backend End developers in order to avoid the hassle of System Administration and Operations, it was just logic that the same was going to happen to the Backend. There are many clones that showcase the real power of this strategy.
All of this is amazing, but I have yet to mention any of them. I'm going to list the ones that I know the most and have actually used in projects. There are probably many, but as far as I know, this one have satisfied most of my news, whether it's any of the previously ones mentioned.
Parse.com
Parse's most outstanding features target mobile devices; however, nowadays Parse contains an incredible amount of API's that allows you to use it as full feature backend service for Javascript, Android and even Windows 8 applications (Windows 8 SDK was introduced a few months ago this year).
How does a Parse code looks in Javascript?
Parse works through classes and objects (ain't that beautiful?), so you first create a specific class (can be done through Javascript, REST or even the Data Browser manager) and then you add objects to specific classes.
First, add up Parse as a script tag in javascript:
<script type="text/javascript" src="http://www.parsecdn.com/js/parse-1.1.15.min.js"></script>
Then, through a given Application ID and a Javascript Key, initialize Parse.
Parse.initialize("APPLICATION_ID", "JAVASCRIPT_KEY");
From there, it's all object manipulation
var Person = Parse.Object.extend("Person"); //Person is a class *cof* uppercase *cof*
var personObject = new Person();
personObject.save({name: "John"}, {
success: function(object) {
console.log("The object with the data "+ JSON.stringify(object) + " was saved successfully.");
},
error: function(model, error) {
console.log("There was an error! The following model and error object were provided by the Server");
console.log(model);
console.log(error);
}
});
What about authentication and security?
Parse has a User based authentication system, which pretty much allows you to store a base of users that can manipulate the data. If map the data with User information, you can ensure that only a given user can manipulate specific data. Plus, in the settings of your Parse application, you can specify that no clients are allowed to create classes, to ensure innecesary calls are performed.
Did you REALLY used in a web application?
Yes, it was my tool of choice for a medium fidelity prototype.
Firebase.com
Firebase's main feature is the ability to provide Real Time to your application without all the hassle. You don't need a MeteorJS server in order to bring Push Notifications to your software. If you know Javascript, you are half way through to bring Real Time magic to your users.
How does a Firebase looks in Javascript?
Firebase works in a REST fashion, and I think they do an amazing job structuring the Glory of REST. As a good example, look at the following Resource structure in Firebase:
https://SampleChat.firebaseIO-demo.com/users/fred/name/first
You don't need to be a rocket scientist to know that you are retrieve the first name of the user "Fred", giving there's at least one -usually there should be a UUID instead of a name, but hey, it's an example, give me a break-.
In order to start using Firebase, as with Parse, add up their CDN Javascript
<script type='text/javascript' src='https://cdn.firebase.com/v0/firebase.js'></script>
Now, create a reference object that will allow you to consume the Firebase API
var myRootRef = new Firebase('https://myprojectname.firebaseIO-demo.com/');
From there, you can create a bunch of neat applications.
var USERS_LOCATION = 'https://SampleChat.firebaseIO-demo.com/users';
var userId = "Fred"; // Username
var usersRef = new Firebase(USERS_LOCATION);
usersRef.child(userId).once('value', function(snapshot) {
var exists = (snapshot.val() !== null);
if (exists) {
console.log("Username "+userId+" is part of our database");
} else {
console.log("We have no register of the username "+userId);
}
});
What about authentication and security?
You are in luck! Firebase released their Security API about two weeks ago! I have yet to explore it, but I'm sure it fills most of the gaps that allowed random people to use your reference to their own purpose.
Did you REALLY used in a web application?
Eeehm... ok, no. I used it in a Chrome Extension! It's still in process but it's going to be a Real Time chat inside a Chrome Extension. Ain't that cool? Fine. I find it cool. Anyway, you can browse more awesome examples for Firebase in their examples page.
What's the magic of these services? If you read your Dependency Injection and Mock Object Testing, at some point you can completely replace all of those services for your own through a REST Web Service provider.
Since these services were created to be used inside any application, they are CORS ready. As stated before, I have successfully used both of them from multiple domains without any issue (I'm even trying to use Firebase in a Chrome Extension, and I'm sure I will succeed soon).
Both Parse and Firebase have Data Browser managers, which means that you can see the data you are manipulating through a simple web browser. As a final disclaimer, I have no relationship with any of those services other than the face that James Taplin (Firebase Co-founder) was amazing enough to lend me some Beta access to Firebase.
You actually CAN use SQS from the browser, even without CORS, as long as you only need the browser to send messages, not receive them. Warning: this is a kludge that would make my CS professors cry.
When you perform a GET request via javascript, the browser will always perform the request, however, you'll only get access to the response if it was from the same origin (protocol, host, port). This is your ticket to ride, since messages can be posted to an SQS queue with just a GET, and who really cares about the response anyways?
Assuming you're using jquery, your queue is https://sqs.us-east-1.amazonaws.com/71717171/myqueue, and allows anyone to post a message, the following will post a message with the body "HITHERE" to the queue:
$.ajax({
url: 'https://sqs.us-east-1.amazonaws.com/71717171/myqueue' +
'?Action=SendMessage' +
'&Version=2012-11-05' +
'&MessageBody=HITHERE'
})
The'll be an error in the console saying that the request failed, but the message will show up in the queue anyways.
Have you considered JSONP? That is one way of calling cross-domain scripts from javascript without running into the same origin policy. You're going to have to set up some script somewhere to send you the data, though. Javascript just isn't up to the task.
Depending in what kind of data you want to send, and what you're going to do with it, one way of solving it would be to post the data to a Google Spreadsheet using Ajax. It's a bit tricky to accomplish though.Here is another stackoverflow question about it.
If presentation isn't that important you can just have an embedded Google Spreadsheet Form.
What about mailto:youremail#goeshere.com ? ihihi
Meantime, you can turn on some free hostings like Altervista or Heroku or somenthing else like them .. so you can connect to their server , if i remember these free services allows servers p2p, so you can create a sort of personal web services and push ajax requests as well, obviously their servers are slow for free accounts, but i think it's enought if you do not have so much users traffic, else you should turn on some better VPS or Hosting or Cloud solution.
Maybe CouchDB can provide what you're after. IrisCouch provides free CouchDB instances. Lock it down so that users can't view documents and have a sensible validation function and you've got yourself an easy RESTful place to stick your data in.