Dropzone区块上载到Azure存储

我正在尝试使用dropzone使用SAS(共享访问签名)将大型文件直接上载到Azure存储。这里的Azure侧记录了这一点: https://docs.microsoft.com/en-us/rest/api/storageservices/Put-Block

Dropzone现在支持分块,所以我决定使用它。不幸的是,很难找到它的实现。

我可以使用params在表单数据中发送blockId,但似乎无法从中更改url。

$("#videoSection").dropzone({
            params: function (files, xhr, chunk) {
                console.log(chunk);

                xhr.setRequestHeader('x-ms-blob-type', 'BlockBlob');

                //I can get the blockId from the chunk here

                //this.options.url.replace("test") //doesn't work
                //xhr.open(this.options.method, this.options.url.replace("test"), true); //doesn't work

                return {"url": "test"}; //this returns form-data
            },
            url: "Create",
            method: "PUT",
            //headers: { "x-ms-blob-type": "BlockBlob" },
            chunking: true,
            chunkSize: 4000000,
            forceChunking: true,
            retryChunks: true,
            retryChunksLimit: 3,
            autoProcessQueue: false,
            acceptedFiles: "video/*",
            maxFiles: 1,
            maxFilesize: 3000,
            previewTemplate: $("#videoTemplate").html(),
            dictDefaultMessage: "Drop Video Here",
            init: function () {
                this.on("processing", function (file) {
                    var blockId = 1;

                    @*this.options.url = "@(Config.Value.StoragePrefix)/@(user.Company.StorageName)/inspections/@Model.InspectionData.Inspection.Id/videos/"
                        + file.name + "@Html.Raw(Model.SharedAccessSignature + "&comp=block&blockid=")" + blockId;*@


                    var progressBar = $(file.previewElement).find(".dropzoneProgressBar");
                    progressBar.show();
                });
                this.on("chunksUploaded", function (file, done) {
                    $.ajax({
                        type: "PUT",
                        url: "@(Config.Value.StoragePrefix)/@(user.Company.StorageName)/inspections/@Model.InspectionData.Inspection.Id/videos/"
                            + file.name + "@Html.Raw(Model.SharedAccessSignature + "&comp=blocklist")",
                        success: function (data) {
                            done();
                        },
                        error: function (e) {
                            toastr.error(e);
                            console.log(e);
                        }
                    });
                });
                this.on("uploadprogress", function (file, progress, bytesSent) {
                    var progressBar = $(file.previewElement).find(".dropzoneProgressBar");
                    progress = bytesSent / file.size * 100;
                    progressBar.width(progress + "%");
                });
                this.on("success", function (file, response) {
                    var successCheckmark = $(file.previewElement).find(".dropSuccess");
                    successCheckmark.toggle();
                    var progressBar = $(file.previewElement).find(".dropzoneProgressBar");
                    progressBar.css("background-color", "green");
                });
            }
        });