I have a UWP project in c#/xaml
I'd like to add the feed of a public facebook page to it, without having to log in, no option to comment or anything, just showing the feed, but I only find how to do it using javascript (for example https://developers.facebook.com/docs/plugins/page-plugin )
Is there a way for me to add the javascript to my UWP project, or is there a different way to do this in c#?
You can get the public facebook feed by the /{page-id}/feed in Graph API.
To use the /{page-id}/feed, we should be able to get the access token. We can get it from the app id and app secret in facebook for developers. That you can request the following url to get the facebook feed: https://graph.facebook.com/PAGE-ID/feed?access_token=APP-ID|APP-SECRET.
Then you can use the GetStringAsync of HttpClient to send a GET request to the specified Uri and return the response body as a string in an asynchronous operation.
Related
This C# code, with a proper access token (for scope drive.readonly) in the Authorization header, will work fine and return the file metadata in json format
_httpClient.GetAsync($"https://content.googleapis.com/drive/v3/files/{someDriveFileId}")
However this code (still with the same access token) will return a 403 :
_httpClient.GetAsync($"https://content.googleapis.com/drive/v3/files/{someDriveFileId}?alt=media")
And the following response html (exactly as returned) :
<html><title>Error 403 (Forbidden)!!1</title><a
href=//www.google.com/><span id=logo
aria-label=Google></span></a><p><b>403 Forbidden</b><p>Your client
does not have permission.\n
I've been using this code in production for years and it worked fine, so i suppose it's related to the recent changes at Google regarding the OAuth screens ?
I'm not sure what i should change here, or what i'm doing (now) wrong. Also the message seems a little sketchy for something made at Google, makes me think there is maybe an issue on their side ?
UPDATE:
Thanks to #Iamblichus for fixing the layout of my original answer. I'm newer to stackoverflow posting.
Even though the change in the original answer appears to be at the root of the problem, I found it difficult to use the troubleshooting steps to come to a working solution. I also was already passing the Authorization Bearer token solution, and that was not fixing my problem. After some trial and error the change I had to make was:
Broken GET URL:
https://content.googleapis.com/drive/v2/files/MY_FILE_ID?key=MY_KEY&alt=media&source=downloadUrl
Working GET URL:
https://www.googleapis.com/drive/v2/files/MY_FILE_ID?alt=media&source=downloadUrl
NOTE:
I am using v2 of the API, so you would need to update to url to v3 if using that.
In the file object I get from the google filepicker v2 API, I don't get back a single URL that supports the change made in authentication. I had to concat the file.selfLink string to make the new URL work
var url = file.selfLink + "?alt=media&source=downloadUrl";
ORIGINAL ANSWER:
Is it possible that https://cloud.google.com/blog/products/application-development/upcoming-changes-to-the-google-drive-api-and-google-picker-api is your problem?:
download calls to files.get, revisions.get and files.export endpoints which authenticate using the access token in the query parameter will no longer be supported.
Only requests that download media content (alt=media) are affected by this change.
The access token should be provided in the HTTP header, like Authorization: Bearer oauth2-token or, if that's not possible, follow the workarounds provided in the referenced documentation:
For file downloads, redirect to the webContentLink which will instruct the browser to download the content. If the application wants to display the file to the user, they can simply redirect to the alternateLink in v2 or webViewLink in v3.
For file exports, redirect to the export link in exportLinks with the desired mime type which will instruct the browser to download the content.
Reference:
Changes in authorization to Google Drive API
Authorization via HTTP header
v2 files get documentation
v3 files get documentation
Implementing a code of Embedded Signing in MVC C# Project. When I post for the sign document, It's redirecting to DocuSign page and it will redirect to return URL. using below code
private const string returnUrl = "http://localhost:5050/DSReturn";
...
return Redirect(viewUrl.Url);
Here I want to get that signed document in response instead of email. How this is possible? or is there any other way to get signed document after finish signature process?
You would make the API call to the "document" resource (.../documents/{documentId or constant}).
The post-signing redirect URL is for the purposes of continuing your web workflow. The "event" parameter allows your web application to generate the correct page or results. For example, in the "Loan Co" example at the Dev Center generates a post-signing page that has links for the document, which in turn result in the API call to retrieve the document. In a real-world integration, the redirect URL is not a reliable indicator that the envelope is "completed". For example, the signer could close the browser before the redirect was executed, or the envelope may have subsequent signers. The Connect service provides a much more reliable trigger for downloading the documents.
Expanding on what #WTP mentioned, you have a couple of approaches. First is via a raw API call using the /v2/accounts/{accountId}/envelopes/{envelopeId}/documents/{documentId} endpoint and retrieving the file from the response. More information can be found here.
Another option you may or may not be aware of is using the DocuSign Client NuGet package. Your code would then look something like this pseudocode:
Stream documentStream = EnvelopesApi.GetDocument(accountId, envelopeId, documentId);
If you are not using the NuGet package yet, keep in mind there is setup work that you will have to do to set-up the EnvelopesApi. That information can be found here.
Currently I have a slack button in my WPF application that opens a webpage and asks for user for access.
System.Diagnostics.Process.Start("https://slack.com/oauth/authorize?scope=client&client_id=XXXXXXXXXXXXXXXXXXXXXX");
After authorizing, the page gets redirected to a URL which has a generated code in the parameter that I need to get a token later on. The problem is how do I get this code. For now I have set the the redirect URL to, www.slack.com. And the following url is generated.
https://slack.com/?code=8XXXXXXXXXXXXXXX.XXXXXXXXXXXXXX5&state=
How do get the code back into my application. I am using the following but am not getting the response I need and this executes before the user can even authorize.
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(URL);
var response =req.RequestUri.ToString();
Alternative solutions and suggestions would be good to implement my authorization for a desktop application using C#.
As part of the oauth process Slack will call your application using the redirect url and return the code parameter. So you the redirect URL needs to point to your application. Not to slack.com.
You will need to read the url parameters that your application as been called with. In C# that can be done with code = Request.QueryString["code"];
Your c# application needs to run as ASP script on a webserver that is accessible from the Internet, so that Slack can reach it.
In order to use Slack for authentication your application needs to implement the complete oauth process as described here.
I've searched some time, looking for easy way to connect with some other sites WebAPI. There are some solutions, but they are made in very complicated way.
What I want to do:
Connect with server using URL adress
Provide login and password to get some data
Get data as JSON/XML
Save this data in an "easy-to-read" way. I mean: save it to C# variable which could be easy to modify.
Currently, API that I want to work with is Bing Search, but I'm looking for some universal way. I found an example, but it doesn't work for me and in my app I can't use this class: "DataServiceQuery" because it doesn't exsist.
How do you usually do it? Do you have your favourite solutions? Are there some universal ways or it depends on type of API that you work with?
I'm currently working on .NET MVC app (in case it could make any difference)
From server side
You can use that like below.
// Create an HttpClient instance
HttpClient client = new HttpClient();
// Send a request asynchronously continue when complete
client.GetAsync(_address).ContinueWith(
(requestTask) =>
{
// Get HTTP response from completed task.
HttpResponseMessage response = requestTask.Result;
// Check that response was successful or throw exception
response.EnsureSuccessStatusCode();
// Read response asynchronously as JsonValue
response.Content.ReadAsAsync<JsonArray>().ContinueWith(
(readTask) =>
{
var result = readTask.Result
//Do something with the result
});
});
You can see example on following link.
https://code.msdn.microsoft.com/Introduction-to-HttpClient-4a2d9cee
For JavaScirpt:
You could use jQuery and WebAPI both together to do your stuff.
There are few steps to it.
Call web api with Ajax jquery call.
Get reponse in JSON
Write javascript code to manipulate that response and do your stuff.
This is the easiest way.
See following link for reference:
http://www.codeproject.com/Articles/424461/Implementing-Consuming-ASP-NET-WEB-API-from-JQuery
It entirely depends on the type of API you want to use. From a .Net point of view, there could be .Net 2 Web Services, WCF Services and Web API Services.
Web APIs today are following the REST standard and RMM. Some APIs need API Keys provided as url parameters, others require you to put in request's header. Even some more robust APIs, use authentication schemes such as OAuth 2. And some companies have devised their own standards and conventions.
So, the short answer is that there is no universal way. The long answer comes from documentation of each API and differs from one to another.
Im using Facebook C# SDK to post and fetch data. These simple tasks took forever to get running properly. Now I need to notify my webpage(ASP.NET C#) about changes on the specific facebook page so the webpage knows then it should fetch new data.
I have looked at this page : https://developers.facebook.com/docs/graph-api/real-time-updates/v2.2
But as usally with facebook documentations it misses to explain in detail how it works and how to get it working. Where exacly do I create the subscriptions? It says /{app-id}/subscriptions but I have tried this url with my app-id but no page is found?
I have tried to find examples on how to set this up but to no sucess.
Could someone please explain how this works? What do I need to do exacly to get this running?
Facebook subscription works by pinging a URL you own every time data has changed. You need to add a URL you own as a callback URL for Facebook subscriptions to work with
POST /v2.2/{app-id}/subscriptions HTTP/1.1
Host: graph.facebook.com
object=page
callback_url=http%3A%2F%2Fexample.com%2Fcallback%2F
fields=feed
verify_token=thisisaverifystring
In the above API request a POST request is made to add http://example.com/callback/ as the callback URL subscribing to the feed edges of the page object (a page object that the session user owns)
In your callback URL you must have it handle two actions
the initial callback (Handling Verification Requests via the verify token)
saving updated subscriptions (Receiving the Real Time Updates)
Here is an example of what it looks like in PHP
<?php
if ($_REQUEST['hub_verify_token'] === 'thisisaverifystring') {
echo $_REQUEST['hub_challenge'];
}
$file = 'sample.txt';
$inputJSON = json_decode(file_get_contents('php://input'));
file_put_contents($file, file_get_contents('php://input') );
?>