My question is very simple and I thought creating this program would only take a couple hours. However now I have been working on it all day trying to figure out what I could be doing wrong.
All I am trying to do is post messages to slack using their postMessage api. I have been able to send messages succesfully using slacks testing methods.
This is the url that is outputted by the test
https://slack.com/api/chat.postMessage?token=xoxp-xxxxxx-xxxxxxxx-xxxxxxxx-xxxxxxxxxxx&channel=XXXXXXXX&text=Just%20need%20the%20url&as_user=jheuman&pretty=1
I then decided to try it out locally using this html file served from my file system
<!DOCTYPE html>
<html>
<head>
<title>Testing Slack API</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
</head>
<body>
<button onClick="test()">Test</button>
<button onClick="test2()">Authorization Test</button>
<script>
function test() {
var apiUrl = "https://slack.com/api/chat.postMessage";
var token = "xoxp-xxxxx...";//my token has been omitted for security;
var channel = "#general";
var text = "Testing slack api";
var user = "jheuman";
var actualToken = "Bearer " + token;
$.ajax({
headers: {
'Authorization':actualToken,
'Content-Type':'application/json'
},
data: JSON.stringify({
"channel": channel,
"text": text,
"as_user": user
}),
dataType: 'json',
processData: false,
type: 'POST',
url: apiUrl
})
.done(function(data) {
console.log(JSON.stringify(data));
})
.fail(function(response) {
console.log(JSON.stringify(response));
});
};
function test2() {
var apiUrl = "https://slack.com/api/auth.test";
var token = "xoxp-xxxxx..."; //my token has been omitted for security
var channel = "#general";
var text = "Testing slack api";
var user = "jheuman";
var actualToken = "Bearer" + token;
$.ajax({
headers: {
'Authorization':actualToken
},
type: 'POST',
url: apiUrl,
})
.done(function(data) {
console.log(JSON.stringify(data));
})
.fail(function(response) {
console.log(JSON.stringify(response));
});
};
</script>
But when I click either button I get the following error:
Failed to load https://slack.com/api/chat.postMessage: Request header field
Authorization is not allowed by Access-Control-Allow-Headers in preflight
response.
So per a friends Suggestion I tried it out on a server. I used Web Server For Chrome to serve it up on port 8887. First without setting cors headers and then with setting cors headers. Both to no avail. I received the same error.
As you can see I also tried the auth.test call but I receive the same error.
Slack specifically states that they prefer an authorization header and that the api can handle json data.
Other things I have tried:
Having no header field with token in data:
data: JSON.stringify({
'token':actualToken,
'channel': channel,
'text': text,
'as_user': user
}),
dataType: 'json',
processData: false,
type: 'POST',
url: apiUrl
Errors received:
{"ok":false,"error":"invalid_form_data"}
Having no header field with token in data without 'Bearer':
data: JSON.stringify({
'token':token,
'channel': channel,
'text': text,
'as_user': user
}),
dataType: 'json',
processData: false,
type: 'POST',
url: apiUrl
Errors received:
{"ok":false,"error":"invalid_form_data"}
Things I have looked into but don't think will effect outcome
So how do I get this post request to work?
I am not set on jquery or ajax, it is just what I have used in the past so if you have a different request library to use I'm all ears.
If you need more information I will try to give it to you
