Fetch CORS error with instagram api

问题

I'm trying to get some data from instagram api but I keep getting the following error: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at https://api.instagram.com/v1/users/1652250683/media/recent/?MYTOKEN&count=20&callback=?. (Reason: CORS header ‘Access-Control-Allow-Origin’ missing).
Also I checked everything on instagram dev site and all options seem fine. This is my code:

fetch('https://api.instagram.com/v1/users/1652250683/media/recent/?MYTOKEN&count=20&callback=', {
    mode: 'cors'
})
    .then(response => response.json())
    .then(function(data) {

        const response = data;

        const images = response['data'].map(img => {
            return [img.images.standard_resolution.url]
        })

        const topImgs = images.slice(0, 7);
        const leftImgs = images.slice(7, 10);
        const rightImgs = images.slice(10, 13);
        const bottomImgs = images.slice(13, 20);

        let topDivs = document.querySelector('.top').children;
        let leftDivs = document.querySelector('.left').children;
        let rightDivs = document.querySelector('.right').children;
        let bottomDivs = document.querySelector('.bottom').children;

        function* enumerate(iterable) {
            let i = 0;

            for (const x of iterable) {
                yield [i, x];
                i++;
            }
        }

        for (const [i, div] of enumerate(topDivs)) {
            div.innerHTML = `<img src="${topImgs[i]}">`
        }

        for (const [i, div] of enumerate(leftDivs)) {
            div.innerHTML = `<img src="${leftImgs[i]}">`
        }

        for (const [i, div] of enumerate(rightDivs)) {
            div.innerHTML = `<img src="${rightImgs[i]}">`
        }
        for (const [i, div] of enumerate(bottomDivs)) {
            div.innerHTML = `<img src="${bottomImgs[i]}">`
        }       

    })
    .catch(function(error) {
        // If there is any error you will catch them here
        console.log(error);
    });

As you can see I only want to get images pretty straightforward.Locally I'm using CORS plugin for chrome and it works fine but on server it does not. Does anyone have any idea what might be the problem and how to solve it ?

回答1:

So guys in order to solve this one you have a few possibilities. One of these is using JQ which has support for JSONP.
Your code would look something like this:

var token = 'your token',
    numPhotos = 20

$.ajax({
    url: 'https://api.instagram.com/v1/users/self/media/recent/',
    dataType: 'jsonp',
    type: 'GET',
    data: {access_token: token, count: numPhotos},
    success: function(data){
        console.log(data);
        // Do something
    },
    error: function(data){
        console.log(data);
    }
});

You can read here more about instagram limitations on number of photos.

Also there is way to get data with pure JS.
From their docs:If you're writing an AJAX application, and you'd like to wrap our response with a callback, all you have to do is specify a callback parameter with any API call.

With that in mind you can do something like this:

var token = 'your token',
    numPhotos = 20,
    scrElement = document.createElement( 'script' );

window.instaFunction = function( data ) {
    console.log(data);
    // Do something
}

scrElement.setAttribute( 'src', 'https://api.instagram.com/v1/users/self/media/recent?access_token=' + token + '&count=' + numPhotos + '&callback=instaFunction' );
document.body.appendChild( scrElement );

来源：https://stackoverflow.com/questions/45508831/fetch-cors-error-with-instagram-api

标签

javascript

ajax

fetch