如何使用cordova api将照片上传到azure blob存储？

Question

我正在尝试使用Cordova api将照片从移动设备上传到azure blob存储.我似乎无法让它工作.任何想法都会有很大帮助.

上传到blob的数据如下所示.

开始---->

- +++++ org.apache.cordova.formBoundary

内容处理:表格数据; NAME = "文件"; 文件名="测试"

内容类型:image/jpeg

内容长度:46785

....

<---结束

---

我的代码:

/*Cordova Camera API calls*/
$scope.takePic = function (type) {

    if (navigator.camera != undefined) {
        if (type == 'PHOTOLIBRARY')
            type = Camera.PictureSourceType.PHOTOLIBRARY;
        else if (type == 'CAMERA')
            type = Camera.PictureSourceType.CAMERA;

        var options = {
            quality: 45,
            destinationType: Camera.DestinationType.DATA_URL,
            sourceType: type,
            allowEdit: true,
            encodingType: Camera.EncodingType.JPEG,
            saveToPhotoAlbum: false
        }
        navigator.camera.getPicture(onSuccess, onFail, options); 
    }
}

$scope.message = "Add an image";
var onSuccess = function (DATA_URL) {
    $scope.message = "Choose another image"; 
    $scope.postForm.onFileSelect = DATA_URL;
    $scope.$apply();
};
var onFail = function (e) {
    $scope.picData = null; 
    $scope.message = "On fail " + e;
};

//$scope.blobSasUrl is url to upload to azure blob storage
var xhr = new XMLHttpRequest();
xhr.onerror = fail;
xhr.onloadend = uploadCompleted;
xhr.open("PUT", $scope.blobSasUrl);
xhr.setRequestHeader('x-ms-blob-type', 'BlockBlob');
xhr.setRequestHeader('x-ms-blob-content-type', 'image/jpeg');
xhr.send($scope.postForm.onFileSelect);

编辑----- //我正在使用Camera.DestinationType.DATA_URI.我也试过FILE_URI.

//This is not working (error)
var reader = new FileReader();
reader.onloadend = function(evt) {
    console.log(evt.target.result);  //nothing happens here
}
reader.readAsDataURL(file);  //file is either DATA_URI or FILE_URI

Answer 1

我通过将其转换为 base64 字符串来使其工作。您可以使用 JavaScript 来完成此操作。