Use the Basic HTTP Authentication (TLDR: Use -u user:pass argument) – Curl Cookbook

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Curl get request (with authentication)

In most cases (I think) you need to add your auth-token to the url you’re using to make a valid API call. Again, you should be able to find this in the documentation of the API your using. In my example, if I want to make an API call, my link should look like this: api/get_all_reviews.php

Curl post request (with authentication)

Same for POST as with GET, we need to add our utoken (Auth-token) to the url. Here is an example of my POST link to the API, with my utoken: api/post_review.php

Generating an auth key

Some API’s only allow POST or GET requests if you use an auth-token. We need to generate this auth-token first, before we are allowed to make API calls. Normally the API docs should explain how you can generate their auth-token. In my example, I can generate an auth-token by posting my API client ID, client_secret and a login type to their API Auth file.

Here is how I can generate and use my auth-token, based on the cURL script of my part-1 tutorial. In this tutorial, I’ll be calling this file api/auth.php

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How to use our auth-token?

Ok good, now we have an auth-token for our app… How do we use this?

No access-control-allow-origin header is present – (cors)

If you’re making JS calls to your own php-files, but your files are on a different server, please at following line at the top of each .php file you’re using:

Proper way to curl authorization: basic with a hash

This curl example works. The hash is a base64 encode of $username . ‘:’ . $password.

curl -H "Authorization: Basic b2ZmZXJib3NzqGdtYxlsLmNvbupHcmVtbdFuJA=="

The following PHP code does not work and returns “status” : “UNAUTHORIZED”, “typeName” : “badCredentials”, “typeCode” : [ 401, 0 ]

$hash = base64_encode($username . ":" . $password);

echo '<p>' . $hash . '</p>'; //hash works correct


$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$URL);
curl_setopt($ch, CURLOPT_TIMEOUT, 30); //timeout after 30 seconds
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_USERPWD, $hash);
$status_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);   //get status code
$result=curl_exec ($ch);
curl_close ($ch);
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