Question

将各种SharePoint 2013 JavaScript应用程序迁移到SharePoint 2016后，我不得不关注SharePoint 2016 Rest API的一个奇怪现象：

假设您有2个ajax调用

上传文件 - ＆gt;返回spFile

获取上传文件的列表项 - ＆gt;返回spItem

jQuery.ajax({
    url: "/sites/mysite/_api/web/getFolderByServerRelativeUrl('/sites/mySite/myLibrary')/files/add(overwrite=true, url='test1.txt')",
    type: "POST",
    data: params.arraybuffer,
    processData: false,
    headers: { "Accept": "application/json;odata=verbose", "X-RequestDigest": params.digest, "X-HTTP-Method": "POST","If-Match": "*" },
    success: function (file) {
        //get listItem for uploaded file
        jQuery.ajax({
            url: file.d.ListItemAllFields.__deferred.uri,
            type: "GET",
            headers: { "accept": "application/json;odata=verbose" },
            success: function (result) {
                //after first upload: OK
                var id = result.d.ID;
            }
        });
    }
});

如果此URL下尚未存在该文件，则一切正常。 SharePoint会创建一个新的列表项，您将在第二次调用中获得具有正确ID的新项 - 假设我们获得ID 1。

如果此URL下已存在具有相同名称的文件，并且稍后将其删除，则SharePoint将生成具有新ID的新项目。这是预期的。但是：在这种情况下，SharePoint Rest API会返回错误的列表项。您将获得ID为1的旧已删除项目，而不是新创建的列表项（ID 2）。

在SharePoint 2013中，不会发生此错误。在SharePoint 2016中 - 仅在ajax调用1和ajax调用2的相同浏览器上下文的情况下才会出现此错误。通常，您会受到此错误的影响，如果您在更新某些元值的同时上载文件。 / p>

这似乎是SharePoint 2016中的一个错误。我想，MS已经实施了更严格的缓存算法并且越过了目标。

Answer 1

在MS修复此错误之前，我找到了一个解决方法：

以临时名称上传您的文件 - jQuery.Guid.New（）+ myExtension
获取上传文件的新项目
发送呼叫以删除具有真实目标名称的可能存在的文件

将您上传的文件重命名为真实目标名称

                var real_filename = 'test1.txt';
                var temp_filename = jQuery.Guid.New() + '.txt';
                // upload temp_filename instead real filename - fixes SharePoint 2016 ZombieId CacheBug
                jQuery.ajax({
                    url: "/sites/mySite/_api/web/getFolderByServerRelativeUrl('/sites/mySite/myLibrary')/files/add(overwrite=true, url='" + temp_filename + "')",
                    type: "POST",
                    data: params.arraybuffer,
                    processData: false,
                    headers: { "Accept": "application/json;odata=verbose", "X-RequestDigest": params.digest, "X-HTTP-Method": "POST","If-Match": "*" },
                    success: function (file) {
                        //delete a possiblly existing file with real target name
                        jQuery.ajax({
                            url: "/sites/mySite/_api/web/GetFileByServerRelativeUrl('/sites/mySite/myLibrary/" + real_filename + "')",
                            type: "POST",
                            processData: false,
                            headers: { "Accept": "application/json;odata=verbose", "X-RequestDigest": params.digest, "X-HTTP-Method": "DELETE", "If-Match": "*" },
                            success: function () {
                                //target file was existing
                                finalize(file);
                            },
                            error: function () {
                                //target file was not existing
                                finalize(file);
                            }
                        });
                    }
                });
                function finalize(file) {
                    //get listItem for uploaded file
                    jQuery.ajax({
                        url: file.d.ListItemAllFields.__deferred.uri,
                        type: "GET",
                        headers: { "accept": "application/json;odata=verbose" },
                        success: function (result) {
                            var spItem = result.d;
                            //rename the uploaded file
                            jQuery.ajax({
                                url: spItem.__metadata.uri,
                                type: "POST",
                                data: JSON.stringify({ __metadata: { 'type': spItem.__metadata.type }, FileLeafRef: real_filename }),
                                headers: { "Accept": "application/json;odata=verbose", "X-RequestDigest": params.digest, "content-type": "application/json;odata=verbose", "X-HTTP-Method": "MERGE", "If-Match": "*" },
                                success: function () {
                                    //file was renamed
                                    spItem.FileLeafRef = real_filename;
                                    defer.resolve(spItem);
                                },
                                error: function (e) {
                                    //something went wrong
                                    defer.resolve(null, e);
                                }
                            });
                        }
                    });
                }

您知道SharePoint 2016＆＃34; Zombie ItemID缓存错误＆＃34;？

1 个答案: