图片跨域上传示例

Image cross-domain upload example.

​x
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#### Settings
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​
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```javascript
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{
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    imageUpload       : true,
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    imageFormats      : ["jpg", "jpeg", "gif", "png", "bmp", "webp"],
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    imageUploadURL    : "http://xxxxxxx/editor.md/examples/php/cross-domain-upload.php?test=dfdf",
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    crossDomainUpload : true,
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    uploadCallbackURL : "http://xxxxxx/upload_callback.html?test=dfdf"
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}
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```
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​
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#### 跨域上传原理
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​
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利用 iframe 来实现，A 站 POST 到 B 站，B 站处理上传后再跳转回到 A 站的 callback 页面，callback 页面此时在 iframe 内（即同域下），再通过 window.parent 就可以操作父页面的任意元素了。
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​
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#### 跨域上传示例 PHP 版
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​
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当前域名：blog.xxx.com/post.php
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​
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```html
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<form method="post" target="upload-iframe" enctype="multipart/form-data" action="http://static.xxx.com/uploader.php?callback=http://blog.xxx.com/upload-callback.html">
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    <input type="file" name="file" accept="image/*" />
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    <input type="submit" id="submit" value="开始上传" />
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</form>
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<iframe name="upload-iframe" style="display:none;" frameborder="0"></iframe>
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```
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​
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图片服务器：static.xxx.com/uploader.php
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​
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```php
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<?php
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header("Access-Control-Allow-Origin: *"); // Setting allow domian name
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​
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$file = 'uploads/' . $_FILES['file']['name'];
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// 详细过程略
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move_uploaded_file($_FILES['file']['tmp_name'], $file);
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​
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$location = $_GET['callback'].'?success=1&message=xxxxxxx&url=http://static.xxx.com/2015/02/15'.$file.'&temp='.date('ymdhis');
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​
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header('location:' . $location);
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exit;
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?>
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```
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​
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当前域名：blog.xxx.com/upload-callback.html
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​
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```html
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<script type="text/javascript">
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    var query = {};
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    var urlParams = window.location.search.split('?')[1];
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    urlParams = urlParams.split("&");
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​
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    for (var i = 0; i< urlParams.length; i++) {
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        var param = urlParams[i].split("=");
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        query[param[0]] = param[1];
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    }
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​
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    var imageDialog = window.parent.document.getElementById(query['dialog_id']);
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    //console.log(imageDialog, window.parent.document, window.parent, query);
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</script>
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```

Settings

  1. {
  2.     imageUpload       : true,
  3.     imageFormats      : ["jpg", "jpeg", "gif", "png", "bmp", "webp"],
  4.     imageUploadURL    : "http://xxxxxxx/editor.md/examples/php/cross-domain-upload.php?test=dfdf",
  5.     crossDomainUpload : true,
  6.     uploadCallbackURL : "http://xxxxxx/upload_callback.html?test=dfdf"
  7. }

跨域上传原理

利用 iframe 来实现，A 站 POST 到 B 站，B 站处理上传后再跳转回到 A 站的 callback 页面，callback 页面此时在 iframe 内（即同域下），再通过 window.parent 就可以操作父页面的任意元素了。

跨域上传示例 PHP 版

当前域名：blog.xxx.com/post.php

  1. <form method="post" target="upload-iframe" enctype="multipart/form-data" action="http://static.xxx.com/uploader.php?callback=http://blog.xxx.com/upload-callback.html">
  2.     <input type="file" name="file" accept="image/*" />
  3.     <input type="submit" id="submit" value="开始上传" />
  4. </form>
  5. <iframe name="upload-iframe" style="display:none;" frameborder="0"></iframe>

图片服务器：static.xxx.com/uploader.php

  1. <?php
  2. header("Access-Control-Allow-Origin: *"); // Setting allow domian name
  4. $file = 'uploads/' . $_FILES['file']['name'];
  5. // 详细过程略
  6. move_uploaded_file($_FILES['file']['tmp_name'], $file);
  8. $location = $_GET['callback'].'?success=1&message=xxxxxxx&url=http://static.xxx.com/2015/02/15'.$file.'&temp='.date('ymdhis');
  10. header('location:' . $location);
  11. exit;
  12. ?>

当前域名：blog.xxx.com/upload-callback.html

  1. <script type="text/javascript"> 
  2.     var query = {};
  3.     var urlParams = window.location.search.split('?')[1];
  4.     urlParams = urlParams.split("&");
  6.     for (var i = 0; i< urlParams.length; i++) {
  7.         var param = urlParams[i].split("="); 
  8.         query[param[0]] = param[1]; 
  9.     }
  11.     var imageDialog = window.parent.document.getElementById(query['dialog_id']);
  12.     //console.log(imageDialog, window.parent.document, window.parent, query);
  13. </script>