博客地址：http://blog.csdn.net/FoxDave
SharePoint网站、列表和列表项都属于SecurableObject类型。默认情况下，一个安全对象继承父级的权限。对一个对象设置自定义权限，你需要打破它从父级的继承，通过增删role assignments来自定义权限。
本篇同样会以代码示例来说明如何在列表上设置自定义权限，然后再更改一个组的权限。该示例使用REST服务来：
>获取目标组的ID。该示例通过目标组的ID来获取当前列表上的组所具有的角色绑定，并向列表添加新的角色。
>获取为组定义的新的权限的角色定义的ID，该ID用来向列表添加新的角色。该示例使用已存在的角色定义来定义新的角色，当然你也可以选择创建一个新的角色定义。
>使用BreakRoleInheritance方法打破列表上的权限继承。该示例打破了列表的权限继承并保留当前的权限设置。（在打破权限继承的时候，也可以选择不保留当前的设置而只把当前用户添加到管理权限级别。）
>通过发送DELETE方法请求到role assignment端点来移除列表上的组当前的role assignment。（如果你在打破权限继承的时候没有保留现有设置，可以忽略此步。）
>使用AddRoleAssignment方法向组添加一个role assignment到目标列表，该操作会将组绑定到一个角色定义并将该角色添加到列表上。
前置条件
>SharePoint开发环境
>带有Office Developer Tools的Visual Studio 2013或更高版本
此外还需要设置Add-in在网站范围内的完全控制权限，只有具有足够权限来更改列表权限的用户（如网站所有者）可以执行这个add-in。
示例：使用REST接口在列表上自定义权限
下面的示例展示了一个SharePoint承载的Add-in中的App.js文件的内容。第一个示例使用JavaScript跨域库来构建和发送HTTP请求，第二个示例使用jQuery AJAX请求。在你执行代码之前，需要把占位符的值替换成真实的值。
示例一：跨域库请求
'use strict';
// Change placeholder values before you run this code.
var listTitle = 'List 1';
var groupName = 'Group A';
var targetRoleDefinitionName = 'Contribute';
var appweburl;
var hostweburl;
var executor;
var groupId;
var targetRoleDefinitionId;
$(document).ready( function() {
//Get the URI decoded URLs.
hostweburl = decodeURIComponent(getQueryStringParameter("SPHostUrl"));
appweburl = decodeURIComponent(getQueryStringParameter("SPAppWebUrl"));
// Load the cross-domain library file and continue to the custom code.
var scriptbase = hostweburl + "/_layouts/15/";
$.getScript(scriptbase + "SP.RequestExecutor.js", getTargetGroupId);
});
// Get the ID of the target group.
function getTargetGroupId() {
executor = new SP.RequestExecutor(appweburl);
var endpointUri = appweburl + "/_api/SP.AppContextSite(@target)/web/sitegroups/getbyname('";
endpointUri += groupName + "')/id" + "?@target='" + hostweburl + "'";
executor.executeAsync({
url: endpointUri,
method: 'GET',
headers: { 'accept':'application/json;odata=verbose' },
success: function(responseData) {
var jsonObject = JSON.parse(responseData.body);
groupId = jsonObject.d.Id;
getTargetRoleDefinitionId();
},
error: errorHandler
});
}
// Get the ID of the role definition that defines the permissions
// you want to assign to the group.
function getTargetRoleDefinitionId() {
var endpointUri = appweburl + "/_api/SP.AppContextSite(@target)/web/roledefinitions/getbyname('";
endpointUri += targetRoleDefinitionName + "')/id" + "?@target='" + hostweburl + "'";
executor.executeAsync({
url: endpointUri,
method: 'GET',
headers: { 'accept':'application/json;odata=verbose' },
success: function(responseData) {
var jsonObject = JSON.parse(responseData.body)
targetRoleDefinitionId = jsonObject.d.Id;
breakRoleInheritanceOfList();
},
error: errorHandler
});
}
// Break role inheritance on the list.
function breakRoleInheritanceOfList() {
var endpointUri = appweburl + "/_api/SP.AppContextSite(@target)/web/lists/getbytitle('";
endpointUri += listTitle + "')/breakroleinheritance(true)?@target='" + hostweburl + "'";
executor.executeAsync({
url: endpointUri,
method: 'POST',
headers: { 'X-RequestDigest':$('#__REQUESTDIGEST').val() },
success: deleteCurrentRoleForGroup,
error: errorHandler
});
}
// Remove the current role assignment for the group on the list.
function deleteCurrentRoleForGroup() {
var endpointUri = appweburl + "/_api/SP.AppContextSite(@target)/web/lists/getbytitle('";
endpointUri += listTitle + "')/roleassignments/getbyprincipalid('" + groupId + "')?@target='" + hostweburl + "'";
executor.executeAsync({
url: endpointUri,
method: 'POST',
headers: {
'X-RequestDigest':$('#__REQUESTDIGEST').val(),
'X-HTTP-Method':'DELETE'
},
success: setNewPermissionsForGroup,
error: errorHandler
});
}
// Add the new role assignment for the group on the list.
function setNewPermissionsForGroup() {
var endpointUri = appweburl + "/_api/SP.AppContextSite(@target)/web/lists/getbytitle('";
endpointUri += listTitle + "')/roleassignments/addroleassignment(principalid=" + groupId;
endpointUri += ",roledefid=" + targetRoleDefinitionId + ")?@target='" + hostweburl + "'";
executor.executeAsync({
url: endpointUri,
method: 'POST',
headers: { 'X-RequestDigest':$('#__REQUESTDIGEST').val() },
success: successHandler,
error: errorHandler
});
}
// Get parameters from the query string.
// For production purposes you may want to use a library to handle the query string.
function getQueryStringParameter(paramToRetrieve) {
var params = document.URL.split("?")[1].split("&");
for (var i = 0; i < params.length; i = i + 1) {
var singleParam = params[i].split("=");
if (singleParam[0] == paramToRetrieve) return singleParam[1];
}
}
function successHandler() {
alert('Request succeeded.');
}
function errorHandler(xhr, ajaxOptions, thrownError) {
alert('Request failed: ' + xhr.status + '\n' + thrownError + '\n' + xhr.responseText);
}示例二：jQuery AJAX请求
// Change placeholder values before you run this code.
var siteUrl = 'http://server/site';
var listTitle = 'List 1';
var groupName = 'Group A';
var targetRoleDefinitionName = 'Contribute';
var groupId;
var targetRoleDefinitionId;
$(document).ready( function() {
getTargetGroupId();
});
// Get the ID of the target group.
function getTargetGroupId() {
$.ajax({
url: siteUrl + '/_api/web/sitegroups/getbyname(\'' + groupName + '\')/id',
type: 'GET',
headers: { 'accept':'application/json;odata=verbose' },
success: function(responseData) {
groupId = responseData.d.Id;
getTargetRoleDefinitionId();
},
error: errorHandler
});
}
// Get the ID of the role definition that defines the permissions
// you want to assign to the group.
function getTargetRoleDefinitionId() {
$.ajax({
url: siteUrl + '/_api/web/roledefinitions/getbyname(\''
+ targetRoleDefinitionName + '\')/id',
type: 'GET',
headers: { 'accept':'application/json;odata=verbose' },
success: function(responseData) {
targetRoleDefinitionId = responseData.d.Id;
breakRoleInheritanceOfList();
},
error: errorHandler
});
}
// Break role inheritance on the list.
function breakRoleInheritanceOfList() {
$.ajax({
url: siteUrl + '/_api/web/lists/getbytitle(\'' + listTitle
+ '\')/breakroleinheritance(true)',
type: 'POST',
headers: { 'X-RequestDigest':$('#__REQUESTDIGEST').val() },
success: deleteCurrentRoleForGroup,
error: errorHandler
});
}
// Remove the current role assignment for the group on the list.
function deleteCurrentRoleForGroup() {
$.ajax({
url: siteUrl + '/_api/web/lists/getbytitle(\'' + listTitle
+ '\')/roleassignments/getbyprincipalid(' + groupId + ')',
type: 'POST',
headers: {
'X-RequestDigest':$('#__REQUESTDIGEST').val(),
'X-HTTP-Method':'DELETE'
},
success: setNewPermissionsForGroup,
error: errorHandler
});
}
// Add the new role assignment for the group on the list.
function setNewPermissionsForGroup() {
$.ajax({
url: siteUrl + '/_api/web/lists/getbytitle(\'' + listTitle
+ '\')/roleassignments/addroleassignment(principalid='
+ groupId + ',roledefid=' + targetRoleDefinitionId + ')',
type: 'POST',
headers: { 'X-RequestDigest':$('#__REQUESTDIGEST').val() },
success: successHandler,
error: errorHandler
});
}
function successHandler() {
alert('Request succeeded.');
}
function errorHandler(xhr, ajaxOptions, thrownError) {
alert('Request failed: ' + xhr.status + '\n' + thrownError + '\n' + xhr.responseText);
}
本篇就介绍到这里。
