加载图像数据转换成Angularjs [英] Load Image Data into Angularjs

问题描述

我有一大堆的图片网址，我想从浏览器中的图像下载到一个zip文件。我打算使用 jszip 来创建压缩文件。而我从服务器的所有图像的URL。我尝试是：

I have a bunch of image urls and I want to download the images from the browser into a zip file. I'm planning on using jszip to create the zip file. And I have all the image urls from the server. What I attempted was :

var img = zip.folder("profiles");



async.mapSeries($scope.queriedUsers, 
    function (user, iterCallback) {

        delete $http.defaults.headers.common['X-Requested-With'];
        $http.get(user.profile_image_url, {responseType: "arraybuffer"})
            .success(function (data) {
                iterCallback(null, {data: data, name: user.screen_name});
            })
            .error(function (data, status) {
                iterCallback(status, data);
            })

        },
    function (err, results) {
        _.each(results, function (result){
            img.file(result.screen_name + ".gif", result.data, {base64: true});
        });

        var content = zip.generate();
        window.location.href = "data:application/zip;base64," + content;
    });

和我得到的错误是：

OPTIONS <url> No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:3000' is therefore not allowed access. 

我觉得有趣的是，在HTML图像加载罚款：

What I find interesting is that in the html the images load fine:

<tbody>
    <tr ng-repeat="user in queriedUsers">
        <td><a href="https://twitter.com/{{user.screen_name}}"><img ng-src="{{user.profile_image_url}}" alt="User Twitter Image"></a></td>
        <td><a href="https://twitter.com/{{user.screen_name}}">{{user.screen_name}}</a></td>
        <td>{{user.name}}</td>
        <td>{{user.description}}</td>  
    </tr>
</tbody>

我如何将图像数据加载到ang​​ularjs？有没有办法直接获取它的NG-SRC？

How do I load the image data into angularjs? Is there a way to get it directly for the ng-src?

感谢

推荐答案

基本上，你在这里有一个跨域问题。您可以打开与远程URL的图像，但你不能让Ajax请求比你不同的域。请看看这里： http://en.wikipedia.org/wiki/Same-origin_policy

Basically you have a cross domain issue here. You can open images with remote URL but you cannot make Ajax request to a different domain than yours. Please take a look here: http://en.wikipedia.org/wiki/Same-origin_policy

您可以通过创建一个代理超越了这个问题。这意味着你的Ajax请求将指向您的服务器和响应，你可以发送图像地址，该地址可以正常使用后

You can overtake this problem by creating a proxy. This means that your Ajax request would be pointing to your server and at the response you could send the image address, which can be used normally afterwards.

这篇关于加载图像数据转换成Angularjs的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！