I am creating an attendance app in which if an employee got the approval on leave request, then the app should send a message in the Slack channel.
I have seen this flutter package on the pub but it is not very helpful:-
https://pub.dev/packages/flutter_slack_oauth
Any idea on how I can send a message in the Slack channel using Flutter?
Finally got the answer, and wants to share :)
Here is the slack API URL to create a new app:-
https://api.slack.com/apps
After creating a new app, activate the Incoming Webhooks feature:-
Grab the webhook URL for your workspace, and make a request via this Flutter function:-
import 'dart:convert';
import 'package:http/http.dart' as http;
sendSlackMessage(String messageText) {
//Slack's Webhook URL
var url = 'https://hooks.slack.com/services/TA******JS/B0**********SZ/Kk*******************1D';
//Makes request headers
Map<String, String> requestHeader = {
'Content-type': 'application/json',
};
var request = {
'text': messageText,
};
var result = http
.post(url, body: json.encode(request), headers: requestHeader)
.then((response) {
print(response.body);
});
print(result);
}
You can also use slack post api for posting message.
var url = "https://slack.com/api/chat.postMessage";
var headers: {
"Content-type": "application/json",
"Authorization": 'Bearer $oAuthToken'
};
var body = {"channel": "Your_Channel_Id", "text": ":tada: :tada: :tada:", "as_user": true};
Add scope chat:write in your app configuration.
And now you will be able to send message to you channel. Hopefully it helps.
Related
I'm trying to fetch an image resource that's part of a conversation message.
I've tried both FETCH as well as using AXIOS but I'm getting the same error message.
Here's an example of my FETCH request
const token = `${accountSid}:${authToken}`;
const encodedToken = Buffer.from(token).toString('base64');
let response = await fetch('https://mcs.us1.twilio.com/v1/Services/<SERVICE_SID>/Media/<MEDIA_SID>',
{
method:'GET',
headers: {
'Authorization': `Basic ${encodedToken}`,
}
});
let data = await response.json();
console.log(data);
And here's what Axios looked like
let config = {
method: 'get',
crossdomain: true,
url: 'https://mcs.us1.twilio.com/v1/Services/<SERVICE_SID>/Media/<MEDIA_SID>',
headers: {
'Authorization': `Basic ${encodedToken}`,
},
};
try {
const media = await axios(config);
console.dir(media);
} catch(err) {
console.error(err);
}
Both ways are NOT working.
After looking into it more, I found out that Chrome makes a pre-flight request and as part of that requests the allowed headers from the server.
The response that came back was this
as you can see, in the "Response Headers" I don't see the Access-Control-Allow-Headers which should have been set to Authorization
What am I missing here?
I have made sure that my id/password as well as the URL i'm using are fine. In fact, I've ran this request through POSTMAN on my local machine and that returned the results just fine. The issue is ONLY happening when I do it in my code and run it in the browser.
I figured it out.
I don't have to make an http call to get the URL. It can be retrieved by simply
media.getContentTemporaryUrl();
When I register a service account for the Vision API Product Search there's a json file downloaded into my desktop that has the private key. However, when making a request into this api there's no place to send that JSON. I'll show you the documentation and my code.
I didn't understand also what is the curl request and how to send it using the http post request.
And This is my code:
Future<void> uploadProductSet() async {
var projectId = 'estoOne';
var locationId = 'europe-west1';
var url = 'https://vision.googleapis.com/v1/projects/$projectId/locations/$locationId/productSets';
final responseOne = await http
.post(Uri.parse(url),
body: json.encode({
'displayName': 'Product-Set-One',
}))
.catchError((error) {
throw error;
});
print(resoinseOne.body);
}
You have to send your access token with the Authorization header.
The API seems to use the Bearer authentication method.
So set the following header in your http request: Bearer $authToken
You should get the auth-token from the credentials file you've downloaded
So your code should look something like this: (untested)
await http.post(Uri.parse(url),
headers: { 'Authorization': 'Bearer $authToken' },
body: json.encode({
'displayName': 'Product-Set-One',
})).catchError((error) {
throw error
})
I'm trying to make HTTP POST request to consume Mailchimp API (From Angular7 code)
but i'm getting this response:
Access to XMLHttpRequest at 'https://us12.api.mailchimp.com/3.0/lists/ddddddd/members' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.
From REST client i'm able to make insert in Mailchimp without having this CROS issue
export class MyService {
constructor(public httpRequestsService: HttpRequestsService) { }
private async getHttpHeader() {
const rheaders = new HttpHeaders({
'Content-Type': 'application/json' ,
'Access-Control-Allow-Origin': '*',
'Access-Control-Allow-Methods': 'POST, GET, OPTIONS',
'Access-Control-Allow-Headers':'X-Requested-With',
'Authorization': 'apikey ' + MailchimpSettings.API_KEY
});
return { headers: rheaders };
}
public async AddNewMember(email: string, language = 'en', status = , mergeFields?: any) {
var url = MailchimpSettings.URL;
var body = {
"email_address": email,
"status": MailchimpSettings.SUBSCRIBED_STATUS,
"language": language
};
var httpOptions = await this.getHttpHeader();
var _body = JSON.stringify(body);
var result = await this.post(url, _body, httpOptions);
}
public async post(url: string, body: string | {} = {}, requestHeaders?: any): Promise<Response> {
return this.http.post(url, body, requestHeaders).toPromise()
.then((res: any) => {
return res;
})
.catch((err) => {
return this.handleErrorPromise(err);
});
}
}
Anyone who can help me with right HTTP headers (or any required change) to reproduce exactly REST client behavior and be able to make a successful POST.
Thanks for your help
Unfortunately, the answer is you can't. Mailchimp does not support CORS because that would require passing API credentials, and that is not secure.
The option is to make requests from another server like you mentioned from the REST client or make a custom signup form that will use more restricted API call.
Or use jsonp request for mailchimp form clients.
See this
I'm currently building out an Angular 7 App, and trying to implement the following HTTP API Call Scenario:
Request for an Application Token:
https://(URL)/token
Request Type: POST
Headers:
Accept: application/json
Request Body: empty
I have a Service class in the Angular app and the code is as follows:
import { HttpClient } from '#angular/common/http';
import { HttpHeaders } from '#angular/common/http';
The requestToken function is implemented as follows:
requestToken() {
let headers = new HttpHeaders();
headers = headers.set('Accept', 'application/json');
return this.http.post(this.configUrl + '/token', headers);
}
The Service is then called in one of the components in the App:-
getToken() {
this.service.requestToken().subscribe( res => {
console.log(res);
}, error => {
console.log(error);
});
}
When I run the App, I get a 404 Not Found error in the console. I used Postman to make an API call, setting the 'Accept' header to 'application/json' and then specifying url as https://(URL)/token and I successfully get a response. But I'm unable to make it work via Angular.
Is there something else I need to do to set the header properly in Angular? Also, I have no way to check if CORS has been enabled on the API server as this is a third-party service which I'm trying to call.
Any help would be appreciated. Thanks
Solved the problem. Changed the POST call to the following:
requestToken() {
const httpHeaders = new HttpHeaders({
'Accept': 'application/json'
});
return this.http.post(this.configUrl + '/token', { body: ''}, { headers: httpHeaders });
}
Had to add an empty 'body' parameter
I have local api and jwt by node js i want to send my username and password from flutter and send it to node js to give me this token and later i will save it in local storage but when i tell flutter post to the api doesn't post
my code :
You can use http method here like below Future example
Future postContact(access_token,name,email,phone,message) async {
String apiUrl = '$_apiUrl/user/contact-us';
http.Response response = await http.post(apiUrl,headers: {
"Accept": "application/json",
"Accesstoken": "Bearer $access_token"
}, body: {'name':'$name','email':'$email','phone':'$phone','message':'$message'});
print("Result: ${response.body}");
return json.decode(response.body);
}