html 使用图像裁剪进行角度上传

Posted 2021-05-11

angular.module('cropAndUpload', [
  'angularFileUpload',
  'ngImgCrop'
])

angular.module('cropAndUpload')
  .controller('Ctrl', function ($scope, FileUploader) {

    var uploader = $scope.uploader = new FileUploader({
        url: '/api/users/photo'
    });

    // FILTERS

    uploader.filters.push({
        name: 'imageFilter',
        fn: function(item /*{File|FileLikeObject}*/, options) {
            var type = '|' + item.type.slice(item.type.lastIndexOf('/') + 1) + '|';
            return '|jpg|png|jpeg|bmp|gif|'.indexOf(type) !== -1;
        }
    });

    // CALLBACKS

    /**
     * Show preview with cropping
     */
    uploader.onAfterAddingFile = function(item) {
      // $scope.croppedImage = '';
      item.croppedImage = '';
      var reader = new FileReader();
      reader.onload = function(event) {
        $scope.$apply(function(){
          item.image = event.target.result;
        });
      };
      reader.readAsDataURL(item._file);
    };

    /**
     * Upload Blob (cropped image) instead of file.
     * @see
     *   https://developer.mozilla.org/en-US/docs/Web/API/FormData
     *   https://github.com/nervgh/angular-file-upload/issues/208
     */
    uploader.onBeforeUploadItem = function(item) {
      var blob = dataURItoBlob(item.croppedImage);
      item._file = blob;
    };

    /**
     * Converts data uri to Blob. Necessary for uploading.
     * @see
     *   http://stackoverflow.com/questions/4998908/convert-data-uri-to-file-then-append-to-formdata
     * @param  {String} dataURI
     * @return {Blob}
     */
    var dataURItoBlob = function(dataURI) {
      var binary = atob(dataURI.split(',')[1]);
      var mimeString = dataURI.split(',')[0].split(':')[1].split(';')[0];
      var array = [];
      for(var i = 0; i < binary.length; i++) {
        array.push(binary.charCodeAt(i));
      }
      return new Blob([new Uint8Array(array)], {type: mimeString});
    };

    uploader.onWhenAddingFileFailed = function(item /*{File|FileLikeObject}*/, filter, options) {
        console.info('onWhenAddingFileFailed', item, filter, options);
    };
    uploader.onAfterAddingAll = function(addedFileItems) {
        console.info('onAfterAddingAll', addedFileItems);
    };
    uploader.onProgressItem = function(fileItem, progress) {
        console.info('onProgressItem', fileItem, progress);
    };
    uploader.onProgressAll = function(progress) {
        console.info('onProgressAll', progress);
    };
    uploader.onSuccessItem = function(fileItem, response, status, headers) {
        console.info('onSuccessItem', fileItem, response, status, headers);
    };
    uploader.onErrorItem = function(fileItem, response, status, headers) {
        console.info('onErrorItem', fileItem, response, status, headers);
    };
    uploader.onCancelItem = function(fileItem, response, status, headers) {
        console.info('onCancelItem', fileItem, response, status, headers);
    };
    uploader.onCompleteItem = function(fileItem, response, status, headers) {
        console.info('onCompleteItem', fileItem, response, status, headers);
    };
    uploader.onCompleteAll = function() {
        console.info('onCompleteAll');
    };

    console.info('uploader', uploader);

  });

<div class="container" ng-controller="Ctrl">
  <div class="row">
    <div class="col-sm-12">


    <div class="row" nv-file-drop="" uploader="uploader">

        <div class="col-md-3">

            <h3>Select files</h3>

            <div ng-show="uploader.isHTML5">
                <!-- 3. nv-file-over uploader="link" over-class="className" -->
                <div class="well my-drop-zone" nv-file-over="" uploader="uploader">
                    Base drop zone
                </div>

                <!-- Example: nv-file-drop="" uploader="{Object}" options="{Object}" filters="{String}" -->
                <div nv-file-drop="" uploader="uploader" options="{ url: '/foo' }">
                    <div nv-file-over="" uploader="uploader" over-class="another-file-over-class" class="well my-drop-zone">
                        Another drop zone with its own settings
                    </div>
                </div>
            </div>

            <!-- Example: nv-file-select="" uploader="{Object}" options="{Object}" filters="{String}" -->
            <input type="file" nv-file-select="" uploader="uploader" multiple  /><br/>

        </div>

        <div class="col-md-9" style="margin-bottom: 40px">
            <h2>Uploads only images (with canvas preview)</h2>
            <h3>The queue</h3>
            <p>Queue length: {{ uploader.queue.length }}</p>

            <table class="table">
                <thead>
                    <tr>
                        <th width="50%">Name</th>
                        <th ng-show="uploader.isHTML5">Size</th>
                        <th ng-show="uploader.isHTML5">Progress</th>
                        <th>Status</th>
                        <th>Actions</th>
                    </tr>
                </thead>
                <tbody>
                    <tr ng-repeat="item in uploader.queue">
                        <td>
                            <strong>{{ item.file.name }}</strong>

                        <div class="cropArea">
                          <img-crop image="item.image" result-image="item.croppedImage"></img-crop>
                        </div>
                        <div>Cropped Image:</div>
                        <div><img ng-src="{{item.croppedImage}}" /></div>

                        </td>
                        <td ng-show="uploader.isHTML5" nowrap>{{ item.file.size/1024/1024|number:2 }} MB</td>
                        <td ng-show="uploader.isHTML5">
                            <div class="progress" style="margin-bottom: 0;">
                                <div class="progress-bar" role="progressbar" ng-style="{ 'width': item.progress + '%' }"></div>
                            </div>
                        </td>
                        <td class="text-center">
                            <span ng-show="item.isSuccess"><i class="glyphicon glyphicon-ok"></i></span>
                            <span ng-show="item.isCancel"><i class="glyphicon glyphicon-ban-circle"></i></span>
                            <span ng-show="item.isError"><i class="glyphicon glyphicon-remove"></i></span>
                        </td>
                        <td nowrap>
                            <button type="button" class="btn btn-success btn-xs" ng-click="item.upload()" ng-disabled="item.isReady || item.isUploading || item.isSuccess">
                                <span class="glyphicon glyphicon-upload"></span> Upload
                            </button>
                            <button type="button" class="btn btn-warning btn-xs" ng-click="item.cancel()" ng-disabled="!item.isUploading">
                                <span class="glyphicon glyphicon-ban-circle"></span> Cancel
                            </button>
                            <button type="button" class="btn btn-danger btn-xs" ng-click="item.remove()">
                                <span class="glyphicon glyphicon-trash"></span> Remove
                            </button>
                        </td>
                    </tr>
                </tbody>
            </table>

            <div>
                <div>
                    Queue progress:
                    <div class="progress" style="">
                        <div class="progress-bar" role="progressbar" ng-style="{ 'width': uploader.progress + '%' }"></div>
                    </div>
                </div>
                <button type="button" class="btn btn-success btn-s" ng-click="uploader.uploadAll()" ng-disabled="!uploader.getNotUploadedItems().length">
                    <span class="glyphicon glyphicon-upload"></span> Upload all
                </button>
                <button type="button" class="btn btn-warning btn-s" ng-click="uploader.cancelAll()" ng-disabled="!uploader.isUploading">
                    <span class="glyphicon glyphicon-ban-circle"></span> Cancel all
                </button>
                <button type="button" class="btn btn-danger btn-s" ng-click="uploader.clearQueue()" ng-disabled="!uploader.queue.length">
                    <span class="glyphicon glyphicon-trash"></span> Remove all
                </button>
            </div>

        </div>

    </div>



  </div>
</div>