使用AngularJS将正确编码的(base64？)映像上载到SharePoint

Question

我可以将图像文件上传到SharePoint,但它不会被识别为图像.我已经尝试使用以下指令,该指令基于研究表明图像在上传到SharePoint时需要进行base64编码,但它仍然会上传一个看似已损坏的文件:https://github.com/adonespitogo/angular-base64-upload

我很高兴使用此指令,但不确定如何将我需要的内容传递到SharePoint的REST API中.

我原来的迭代不使用这个指令,但更多的是直接上传尝试.

我需要达到的目的如下:

1)成功上传图像而不会"损坏",这是否需要base64编码/我该如何实现？

2)按名称上传图像(不是"test.jpg")并有一些元数据(例如上传一个带有它所属的标题或部门名称的图像)

迭代1:无指令 这是我的HTML(请注意控制器通过ng-route绑定到页面):

 <div class="col-md-12">
        <form>
            <input type="file" onchange="angular.element(this).scope().filesChanged(this)" data-ng-model="files" multiple>
            <button data-ng-click="upload()">Submit</button>
            <li data-ng-repeat="file in files">{{file.name}}</li>
        </form>            
    </div>

这是我的控制器:

$scope.filesChanged = function (elm) {
        $scope.files = elm.files
        $scope.$apply();
    }
    $scope.upload = function () {
        var fd = new FormData()
        angular.forEach($scope.files,function(file){
            fd.append('file',file)
        })
            $http.post("/sites/asite/_api/web/lists/getByTitle('Images')/RootFolder/Files/add(url='test.jpg',overwrite='true')", fd,
                    {
                        transformRequest: angular.identity,
                        headers: {
                            'Content-Type':undefined, 'X-RequestDigest': $("#__REQUESTDIGEST").val()}
                }).success(function (d) {
                    console.log(d);
                });
            }

更新:我认为这个问题与我的$ http帖子分离到了SharePoint.使用上面提到的指令,我可以输出base64,但不确定如何将其传递到我的帖子中进行上传.

迭代2:使用指令 这是我使用https://github.com/adonespitogo/angular-base64-upload指令的当前HTML :

<form>
<input type="file" data-ng-model="files" base-sixty-four-input>
<button data-ng-click="upload()">Submit</button>
</form>

我的控制器将损坏的图像文件发布到SharePoint:

$scope.upload = function () {
        console.log($scope.files); // Output result from upload directive
        $http({
            method: 'POST',
            url: "/sites/ens/_api/web/lists/getByTitle('Report Images')/RootFolder/Files/add(url='" + $scope.files.filename +"',overwrite='true')", 
            headers: {
                'Content-Type': false ,
                'X-RequestDigest': $("#__REQUESTDIGEST").val()
            },
            data: $scope.files,
         }).success(function (data) {
            console.log(data);
        });
    }

更新2:使用SP.RequestExecutor如下创建相同的结果.文件上传但不呈现.这适用于图像和文档:

迭代3:使用Directive和SP.RequestExecutor

$scope.upload = function () {
    var dataURL = 'data:' + $scope.files.filetype + ';' + 'base64,' + $scope.files.base64;
    var createitem = new SP.RequestExecutor("/sites/asite");
    createitem.executeAsync({
        url: "/sites/asite/_api/web/lists/getByTitle('Images')/RootFolder/Files/add(url='" + $scope.files.filename + "')",
        method: "POST",
        binaryStringRequestBody: true,
        body: dataURL,
        success: fsucc,
        error: ferr,
        state: "Update"
    });

    function fsucc(data) {
        alert('success');
    }
    function ferr(data) {
        alert('error\n\n' + data.statusText + "\n\n" + data.responseText);
    }
}

更新3:使用.ajax如下,它将成功发布图像,但使用$ http时,它会破坏图像.

迭代3:使用.Ajax(工作)

function uploadFileSync(spWebUrl , library, filename, file) 
    {
        var reader = new FileReader();
        reader.onloadend = function(evt) 
        {
            if (evt.target.readyState == FileReader.DONE) 
            {
                var buffer = evt.target.result;
                var completeUrl = spWebUrl
                  + "/_api/web/lists/getByTitle('"+ library +"')"
                  + "/RootFolder/Files/add(url='"+ filename +"',overwrite='true')?"
                  + "@TargetLibrary='"+library+"'&@TargetFileName='"+ filename +"'";

                $.ajax({
                    url: completeUrl,
                    type: "POST",
                    data: buffer,
                    async: false,
                    processData: false,
                    headers: {
                        "accept": "application/json;odata=verbose",
                        "X-RequestDigest": $("#__REQUESTDIGEST").val(),
                        "content-length": buffer.byteLength
                    },
                    complete: function (data) {
                        //uploaded pic url
                        console.log(data.responseJSON.d.ServerRelativeUrl);
                        $route.reload();
                    },
                    error: function (err) {
                        alert('failed');
                    }
                });

            }
        };
        reader.readAsArrayBuffer(file);
    }  

迭代4:使用$ http(破坏图像)

function uploadFileSync(spWebUrl , library, filename, file) 
{
    var reader = new FileReader();
    reader.onloadend = function (evt) {
        if (evt.target.readyState == FileReader.DONE) {
            var buffer = evt.target.result;
            var completeUrl = spWebUrl
              + "/_api/web/lists/getByTitle('" + library + "')"
              + "/RootFolder/Files/add(url='" + filename + "',overwrite='true')?"
              + "@TargetLibrary='" + library + "'&@TargetFileName='" + filename + "'";

            $http({
                url: completeUrl,
                method: "POST",
                data: buffer,
                processData: false,
                headers: {
                    "accept": "application/json;odata=verbose",
                    "X-RequestDigest": $("#__REQUESTDIGEST").val(),
                    "content-length": buffer.byteLength
                }
            }).success(function (data) {
                //uploaded pic url
                //console.log(data.responseJSON.d.ServerRelativeUrl);
                $route.reload();
            }).error(function (err) {
                alert(err);
            });
        }
    };
    reader.readAsArrayBuffer(file);
}

Answer 1

是的,您必须执行base64编码.

在本文之后,您filesChanged将使用base64编码:

$scope.filesChanged = function (input) {

    if (input.files && input.files[0]) {
        var reader = new FileReader();
        reader.onload = function (e) {

            //Sets the Old Image to new New Image
            $('#photo-id').attr('src', e.target.result);

            //Create a canvas and draw image on Client Side to get the byte[] equivalent
            var canvas = document.createElement("canvas");
            var imageElement = document.createElement("img");

            imageElement.setAttribute('src', e.target.result);
            canvas.width = imageElement.width;
            canvas.height = imageElement.height;
            var context = canvas.getContext("2d");
            context.drawImage(imageElement, 0, 0);
            var base64Image = canvas.toDataURL("image/jpeg");

            //Removes the Data Type Prefix 
            //And set the view model to the new value
            $scope.data.Photo = base64Image.replace(/data:image\/jpeg;base64,/g, '');
        }

        //Renders Image on Page
        reader.readAsDataURL(input.files[0]);
    }
};

我的建议是将ng-model从$ scope.files更改为$ scope.data.Photo以避免范围问题并在输入标记中添加id.(在这种情况下id ="photo-upload")

因此,您上传的HTML将如下所示:

<input type="file" onchange="angular.element(this).scope().filesChanged(this)" data-ng-model="data.Photo" id="photo-upload" multiple>

并且为了表示您上传的图片,在您的情况下,您可以使用此:

<img ng-src="data:image/jpeg;base64,{{data.Photo}}" id="photo-id"/>

我只是不确定多次上传,但对于单次上传,它对我来说很有用.

希望这可以帮助您解决SharePoint问题.

祝好运!