IT技术 - Promise 链在内部 Promise 被解决之前继续 - 吾爱随笔录

与Promise 在内部Promise解决之前解决类似的问题，但我仍然无法让它工作。

每次我认为我理解了Promise，我就证明自己错了！

我有这样写的函数

function getFileBinaryData () {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + sourceRelativeUrl + "/_api/web/GetFileByServerRelativeUrl('" + fileUrl + "')/$value",
            method: "GET",
            binaryStringResponseBody: true,
            success: function (fileData) {
                resolve(fileData.body);
            },
            error: function  (argument) {

                alert("could not get file binary body")
            }            
        }
        sourceExecutor.executeAsync(executorBody);
    });
    return promise;
}

function copyFileAction (fileBinaryData) {
    var promise = new RSVP.Promise(function(resolve, reject){
        var executorBody = {
            url: rootSite + targetWebRelativeUrl + "/_api/web/GetFolderByServerRelativeUrl('" + targetList + "')/Files/Add(url='" + fileName + "." + fileExt + "', overwrite=true)",
            method: "POST",
            headers: {
                "Accept": "application/json; odata=verbose"
            },
            contentType: "application/json;odata=verbose",
            binaryStringRequestBody: true,
            body: fileBinaryData,
            success: function (copyFileData) {
                resolve();
            },
            error: function  (sender, args) {

            }
        }
        targetExecutor.executeAsync(executorBody);    
    });
    return promise;
}

我试着像这样链接

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(getFileInformation)
            .then(getFileBinaryData)
            .then(copyFileAction)
            .then(getTargetListItem)
            .then(updateTargetListItem)
            .catch(function (sender, args) {

            });

或者像这样

$.getScript("/_layouts/15/SP.RequestExecutor.js")
            .then(patchRequestExecutor)
            .then(function(){
                sourceExecutor = new SP.RequestExecutor(sourceFullUrl);
                targetExecutor = new SP.RequestExecutor(targetList);
            })
            .then(function(){
                return getFileInformation();
            })
            .then(function(){
                return getFileBinaryData();
            })
            .then(function(binaryData){
                return copyFileAction(binaryData)
            })
            .then(function(){
                return getTargetListItem();
            })
            .then(function(listItem){
                return updateTargetListItem(listItem);
            });

但问题是，即使我返回新的Promise，在解决任何内部Promise之前，执行仍会继续沿链向下。怎么来的？不应该等到异步请求成功并resolve()在success回调中调用吗？