[原子操作与可见性]的搜索结果

...即用，不安装，不污染操作系统，让操作系统历久弥新； 3、可视化：可视化的模板设计器，通过拖拽即可完成模板设计； 4、高精度：实现精确到毫米的打印精度，对于一些格式复杂，要求精确打印的场合，可以很容易达到毫米级精度； 5、易套打：可视化的模板设计器，在模板中加入一个票据格式的底图，可以很方便地实现套打，对于实现发票、快递面单、支票等打印毫无压力； 6、功能强：从简单报表、主从报表到嵌套报表甚至交叉报表，均能轻松应对。还有一维二维条形码，甚至，还有逆天的脚本功能，只有想不到，没有做不到； 7、自动化: 打印过程中全部自动化，无需象生成PDF、Word、Excel那样还需要人工再点打印； 8、易部署：打印模板既可以部署在客户端（与 cfprint.exe 程序放在同一目录下），也支持部署在服务端随报表数据一起传到客户端； 9、目标活：支持在数据文件中或模板中指定要输出的打印机，发票用针打、报表用激光打、小票用小票机，专机专打； 三、使用前提条件： 1、IE6以上版本、Chrome(谷歌浏览器)4.0以上版本、Firefox 4.0以上版本、Opera 11以上版本、Safari 5.0.2以上版本、iOS 4.2以上版本 或使用Chrome内核、Firefox内核的浏览器均可直接使用本打印系统； 2、在进行打印前，需要先设计好打印模板（模板设计器请见第五节）； 3、打印数据必须Json的格式发送给打印服务器，并且数据必须满足指定的格式（见下文）； 四、数据格式说明： 下面以一个跨境电商快递面单数据为例解释一下数据各项的含义; { "template": "waybill.fr3", /打印模板文件名。除了指定模板文件以外，还支持把模板嵌入到数据文件中，以实现在服务器端灵活使用打印模板，格式如下：/ /"template": "base64:QTBBRTNEQTE3MkFFQjIzNEFERD<后面省略>" / "ver": 4, /数据模板文件版本/ "Copies": 3, /打印份数，支持指定打印份数/ "Duplex": 1, /是否双面打印，0：默认，不双面，1：垂直，2：水平，3：单面打印(simplex)/ "Printer": "priPrinter", /指定打印机，本系统支持在数据文件中指定打印机，也支持在打印模板中指定打印机/ "PageNumbers": "", /要打印的页码范围，同打印机的打印设置里的格式相同，例如："1,2,3"表示打印前3页， “2-5”:表示打印第2到5页，“1,2,4-8”表示打印第1、2、4到8页/ "Preview": 1, /是否预览，跟主界面上选择“预览”效果相同，取值为0：不预览，1：预览/ "Tables":[ /数据表数组/ { "Name": "Table1", /表名/ "Cols": [ /字段定义/ { "type": "str", /字段类型，可选值：String,Str,Integer,Int,Smallint,Float,Long, Blob，/ /对于图片、PDF等使用Blob类型，并把值进行Base64编码，并加前缀：/ / "base64/pdf:" 字段值是PDF; "base64/jpg:" 字段值是jpg; "base64/png:" 字段值是png; "base64/gif:" 字段值是gif; / "size": 255, /字段长度/ "name": "HAWB", /字段名称，必须与打印模板中的打印项名称相同/ "required": false /字段是否必填/ }, { "type": "int", "size": 0, "name": "NO", "required": false }, { "type": "float", "size": 0, "name": "报关公司面单号", "required": false }, { "type": "integer", "size": 0, "name": "公司内部单号", "required": false }, { "type": "str", "size": 255, "name": "发件人", "required": false }, { "type": "str", "size": 255, "name": "发件人地址", "required": false }, { "type": "str", "size": 255, "name": "发件人电话", "required": false }, { "type": "str", "size": 255, "name": "发货国家", "required": false }, { "type": "str", "size": 255, "name": "收件人", "required": false }, { "type": "str", "size": 255, "name": "收件人地址", "required": false }, { "type": "str", "size": 255, "name": "收件人电话", "required": false }, { "type": "str", "size": 255, "name": "收货人证件号码", "required": false }, { "type": "str", "size": 255, "name": "收货省份", "required": false }, { "type": "float", "size": 0, "name": "总计费重量", "required": false }, { "type": "int", "size": 0, "name": "总件数", "required": false }, { "type": "float", "size": 0, "name": "申报总价（CNY）", "required": false }, { "type": "float", "size": 0, "name": "申报总价（JPY）", "required": false }, { "type": "int", "size": 0, "name": "件数1", "required": false }, { "type": "str", "size": 255, "name": "品名1", "required": false }, { "type": "float", "size": 0, "name": "单价1（JPY）", "required": false }, { "type": "str", "size": 255, "name": "单位1", "required": false }, { "type": "float", "size": 0, "name": "申报总价1（CNY）", "required": false }, { "type": "float", "size": 0, "name": "申报总价1（JPY）", "required": false }, { "type": "int", "size": 0, "name": "件数2", "required": false }, { "type": "str", "size": 255, "name": "品名2", "required": false }, { "type": "float", "size": 0, "name": "单价2（JPY）", "required": false }, { "type": "str", "size": 255, "name": "单位2", "required": false }, { "type": "float", "size": 0, "name": "申报总价2（CNY）", "required": false }, { "type": "float", "size": 0, "name": "申报总价2（JPY）", "required": false }, { "type": "AutoInc", "size": 0, "name": "ID", "required": false }, { "type": "blob", "size": 0, "name": "附件", "required": false } ], "Data": [ /数据行定义，每一行含义见上面的字段定义/ { "HAWB": "860014010055", "NO": 1, "报关公司面单号": 200303900791, "公司内部单号": 730293, "发件人": "NAKAGAWA SUMIRE 2", "发件人地址": " 991-199-113,Kameido,Koto-ku,Tokyo", "发件人电话": "03-3999-3999", "发货国家": "日本", "收件人": "张三丰", "收件人地址": "上海市闵行区虹梅南路1660弄蔷薇八村99号9999室", "收件人电话": "182-1234-8888", "收货人证件号码": null, "收货省份": null, "总计费重量": 3.2, "总件数": 13, "申报总价（CNY）": null, "申报总价（JPY）": null, "件数1": 10, "品名1": "纸尿片", "单价1（JPY）": null, "单位1": null, "申报总价1（CNY）": null, "申报总价1（JPY）": null, "件数2": null, "品名2": null, "单价2（JPY）": null, "单位2": null, "申报总价2（CNY）": null, "申报总价2（JPY）": null, "ID": 1, "附件": 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}, { "HAWB": "860014010035", "NO": 2, "报关公司面单号": 200303900789, "公司内部单号": 730291, "发件人": "NAKAGAWA SUMIRE", "发件人地址": " 991-199-113,Kameido,Koto-ku,Tokyo", "发件人电话": "03-3999-3999", "发货国家": "日本", "收件人": "张无忌", "收件人地址": "上海市闵行区虹梅南路1660弄蔷薇八村88号8888室", "收件人电话": "182-1234-8888", "收货人证件号码": null, "收货省份": null, "总计费重量": 3.2, "总件数": 13, "申报总价（CNY）": null, "申报总价（JPY）": null, "件数1": 10, "品名1": "纸尿片", "单价1（JPY）": null, "单位1": null, "申报总价1（CNY）": null, "申报总价1（JPY）": null, "件数2": null, "品名2": null, "单价2（JPY）": null, "单位2": null, "申报总价2（CNY）": null, "申报总价2（JPY）": null, "ID": 2, 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} ] }, { "Name": "Table2", "Cols": [ { "type": "int", "size": 0, "name": "NO", "required": false }, { "type": "float", "size": 0, "name": "订单编号", "required": false }, { "type": "integer", "size": 0, "name": "下单日期", "required": false }, { "type": "str", "size": 255, "name": "下单平台", "required": false } ], "Data": [ { "NO": 1, "订单编号": 200303900791, "下单日期": "2017-01-20", "下单平台": "天猫" }, { "NO": 2, "订单编号": 200303900792, "下单日期": "2017-01-20", "下单平台": "京东" } ] } ] } 五、调用示例： <!-- ★★★ 模式1 ★★★ --> <!DOCTYPE html> <head> <meta charset="utf-8" /> <title>康虎云报表系统测试</title> </head> <body> <div style="width: 100%;text-align:center;"> <h2>康虎云报表系统</h2> <h3>打印测试（模式1）</h3> <div> <input type="button" id="btnPrint" value="打印" onClick="doSend(_reportData);" /> </div> </div> <div id="output"></div> </body> <script type="text/javascript"> //定义数据脚本 var _reportData = '{"template":"waybill.fr3","Cols":[{"type":"str","size":255,"name":"HAWB","required":false},<这里省略1000字> ]}'; //在浏览器控制台输出调试信息 console.log("reportData = " + _reportData); </script> <script language="javascript" type="text/javascript" src="cfprint.min.js"></script> <script language="javascript" type="text/javascript" src="cfprint_ext.js"></script> <script language="javascript" type="text/javascript"> /下面四个参数必须放在myreport.js脚本后面，以覆盖myreport.js中的默认值/ var _delay_send = 1000; //发送打印服务器前延时时长，-1则表示不自动打印 var _delay_close = 1000; //打印完成后关闭窗口的延时时长, -1则表示不关闭 var cfprint_addr = "127.0.0.1"; //打印服务器监听地址 var cfprint_port = 54321; //打印服务器监听端口 </script> </html> <!-- ★★★ 模式2 ★★★ --> <?php //如果有php运行环境，只需把该文件扩展名改成 .php，然后上传到web目录即可在真实服务器上测试 header("Access-Control-Allow-Origin: "); ?> <!DOCTYPE html> <head> <meta charset="utf-8" /> <title>康虎云报表系统测试</title> <style type="text/css"> output {font-size: 12px; background-color:F0FFF0;} </style> </head> <body> <div style="width: 100%;text-align:center;"> <h2>康虎云报表系统（Ver 1.3.0）</h2> <h3>打印测试（模式2）</h3> <div style="line-height: 1.5;"> <div style="width: 70%; text-align: left;"> <b>一、首先按下列步骤设置：</b><br/> 1、运行打印服务器；<br/> 2、按“停止”按钮停止服务；<br/> 3、打开“设置”区；<br/> 4、在“常用参数-->服务模式”中，选择“模式2”；<br/> 5、按“启动”按钮启动服务。 </div> <div style="width: 70%; text-align: left;"> <b>二、按本页的“打印”按钮开始打印。</b><br/> </div><br/> <input type="button" id="btnPrint" value="打印" /><br/><br/> <div style="width: 70%; text-align: left; font-size: 12px;"> 由于JavaScript在不同域名下访问会出现由来已久的跨域问题，所以正式部署到服务器使用时，要解决跨域问题。<br/> 对于IE8以上版本浏览器，只需增加一个reponse头：Access-Control-Allow-Origin即可，而对于php、jsp、asp/aspx等动态语言而言，增加一个response头是非常简单的事，例如：<br/> <b>在php：</b><br/><span style="color: red;"> <?php <br/> header("Access-Control-Allow-Origin: ");<br/> ?><br/> </span> <b>在jsp：</b><br/><span style="color: red;"> <% <br/> response.setHeader("Access-Control-Allow-Origin", ""); <br/> %><br/> </span> <b>在asp.net中：</b><br/><span style="color: red;"> Response.AppendHeader("Access-Control-Allow-Origin", ""); </span>，<br/>其他语言里，大家请自行搜索“ajax跨域”。而对于IE8以下的浏览器，大家可以自行搜索“IE6+Ajax+跨域”寻找解决办法吧，也可以联系我们帮助。 </div> </div> </div> <div id="output"></div> </body> <!-- 引入模式2所需的javascript支持库 --> <script type="text/javascript" src="cfprint_mode2.min.js" charset="UTF-8"></script> <!-- 构造报表数据 --> <script type="text/javascript"> var _reportData = '{"template":"waybill.fr3","ver":3, "Tables":[ {"Name":"Table1", "Cols":[{"type":"str","size":255,"name":"HAWB","required":false},{"type":"int","size":0,"name":"NO","required":false},{"type":"float","size":0,"name":"报关公司面单号","required":false},{"type":"integer","size":0,"name":"公司内部单号","required":false},{"type":"str","size":255,"name":"发件人","required":false},{"type":"str","size":255,"name":"发件人地址","required":false},{"type":"str","size":255,"name":"发件人电话","required":false},{"type":"str","size":255,"name":"发货国家","required":false},{"type":"str","size":255,"name":"收件人","required":false},{"type":"str","size":255,"name":"收件人地址","required":false},{"type":"str","size":255,"name":"收件人电话","required":false},{"type":"str","size":255,"name":"收货人证件号码","required":false},{"type":"str","size":255,"name":"收货省份","required":false},{"type":"float","size":0,"name":"总计费重量","required":false},{"type":"int","size":0,"name":"总件数","required":false},{"type":"float","size":0,"name":"申报总价（CNY）","required":false},{"type":"float","size":0,"name":"申报总价（JPY）","required":false},{"type":"int","size":0,"name":"件数1","required":false},{"type":"str","size":255,"name":"品名1","required":false},{"type":"float","size":0,"name":"单价1（JPY）","required":false},{"type":"str","size":255,"name":"单位1","required":false},{"type":"float","size":0,"name":"申报总价1（CNY）","required":false},{"type":"float","size":0,"name":"申报总价1（JPY）","required":false},{"type":"int","size":0,"name":"件数2","required":false},{"type":"str","size":255,"name":"品名2","required":false},{"type":"float","size":0,"name":"单价2（JPY）","required":false},{"type":"str","size":255,"name":"单位2","required":false},{"type":"float","size":0,"name":"申报总价2（CNY）","required":false},{"type":"float","size":0,"name":"申报总价2（JPY）","required":false},{"type":"int","size":0,"name":"件数3","required":false},{"type":"str","size":255,"name":"品名3","required":false},{"type":"float","size":0,"name":"单价3（JPY）","required":false},{"type":"str","size":255,"name":"单位3","required":false},{"type":"float","size":0,"name":"申报总价3（CNY）","required":false},{"type":"float","size":0,"name":"申报总价3（JPY）","required":false},{"type":"int","size":0,"name":"件数4","required":false},{"type":"str","size":255,"name":"品名4","required":false},{"type":"float","size":0,"name":"单价4（JPY）","required":false},{"type":"str","size":255,"name":"单位4","required":false},{"type":"float","size":0,"name":"申报总价4（CNY）","required":false},{"type":"float","size":0,"name":"申报总价4（JPY）","required":false},{"type":"int","size":0,"name":"件数5","required":false},{"type":"str","size":255,"name":"品名5","required":false},{"type":"float","size":0,"name":"单价5（JPY）","required":false},{"type":"str","size":255,"name":"单位5","required":false},{"type":"float","size":0,"name":"申报总价5（CNY）","required":false},{"type":"float","size":0,"name":"申报总价5（JPY）","required":false},{"type":"str","size":255,"name":"参考号","required":false},{"type":"AutoInc","size":0,"name":"ID","required":false}],"Data":[{"公司内部单号":730293,"发货国家":"日本","单价1（JPY）":null,"申报总价2（JPY）":null,"单价4（JPY）":null,"申报总价2（CNY）":null,"申报总价5（JPY）":null,"报关公司面单号":200303900791,"申报总价5（CNY）":null,"收货人证件号码":null,"申报总价1（JPY）":null,"单价3（JPY）":null,"申报总价1（CNY）":null,"申报总价4（JPY）":null,"申报总价4（CNY）":null,"收件人电话":"182-1758-9999","收件人地址":"上海市闵行区虹梅南路1660弄蔷薇八村139号502室","HAWB":"860014010055","发件人电话":"03-3684-9999","发件人地址":" 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CFPrint.parseJSON(responseText); alert(response.message+", 状态码["+response.result+"]"); }else{ alert('打印失败，HTTP状态代码是：'+httpStatus); } } / 参数： message: 错误信息 / var callbackFailed = function(message){ alert('发送打印任务出错: ' + message); } </script> <!-- 调用发送打印请求功能 --> <script type="text/javascript"> (function(){ document.getElementById("btnPrint").onclick = function() { CFPrint.outputid = "output"; //指定调试信息输出div的id CFPrint.SendRequest(_url, _reportData, callbackSuccess, callbackFailed); //发送打印请求 }; })(); </script> </html> 六、模板设计器（重要！重要！！，好多朋友都找不到设计器入口） 在主界面上，双击右下角的“设计”两个字，即可打开模板设计工具箱，在工具箱有三个按钮和一个大文本框。三个按钮的作用分别是： 设计：以大文本框中的json数据为数据源，打开模板设计器窗口； 预览：以大文本框中的json数据为数据源，预览当前所用模板的打印效果； 打印：以大文本框中的json数据为数据源，向打印机输出当前所用模板生成的报表； 以后将会有详细的模板设计教程发布，如果您遇到紧急的难题，请向作者咨询。 本篇文章为转载内容。原文链接：https://blog.csdn.net/chensongmol/article/details/76087600。 该文由互联网用户投稿提供，文中观点代表作者本人意见，并不代表本站的立场。 作为信息平台，本站仅提供文章转载服务，并不拥有其所有权，也不对文章内容的真实性、准确性和合法性承担责任。 如发现本文存在侵权、违法、违规或事实不符的情况，请及时联系我们，我们将第一时间进行核实并删除相应内容。

...P.NET平台。由此可见，ASP.NET Identity已经融合到了ASP.NET平台之中——译者注）。正如第13章所解释的那样，HttpContext.User.Identity属性返回IIdentity的接口实现，当使用ASP.NET Identity时，该实现是一个ClaimsIdentity对象。ClaimsIdentity类是在System.Security.Claims命名空间中定义的，表15-5显示了它所定义的与本章有关的成员。 Table 15-5. The Members Defined by the ClaimsIdentity Class 表15-5. ClaimsIdentity类所定义的成员 Name 名称 Description 描述 Claims Returns an enumeration of Claim objects representing the claims for the user. 返回表示用户声明（Claims）的Claim对象枚举 AddClaim(claim) Adds a claim to the user identity. 给用户添加一个声明（Claim） AddClaims(claims) Adds an enumeration of Claim objects to the user identity. 给用户添加Claim对象的枚举。 HasClaim(predicate) Returns true if the user identity contains a claim that matches the specified predicate. See the “Applying Claims” section for an example predicate. 如果用户含有与指定谓词匹配的声明（Claim）时，返回true。参见“运用声明（Claims）”中的示例谓词 RemoveClaim(claim) Removes a claim from the user identity. 删除用户的声明（Claim）。 Other members are available, but the ones in the table are those that are used most often in web applications, for reason that will become obvious as I demonstrate how claims fit into the wider ASP.NET platform. 还有一些可用的其它成员，但表中的这些是在Web应用程序中最常用的，随着我演示如何将声明（Claims）融入更宽泛的ASP.NET平台，它们为什么最常用就很显然了。 In Listing 15-12, I cast the IIdentity implementation to the ClaimsIdentity type and pass the enumeration of Claim objects returned by the ClaimsIdentity.Claims property to the View method. A Claim object represents a single piece of data about the user, and the Claim class defines the properties shown in Table 15-6. 在清单15-12中，我将IIdentity实现转换成了ClaimsIdentity类型，并且给View方法传递了ClaimsIdentity.Claims属性所返回的Claim对象的枚举。Claim对象所示表示的是关于用户的一个单一的数据片段，Claim类定义的属性如表15-6所示。 Table 15-6. The Properties Defined by the Claim Class 表15-6. Claim类定义的属性 Name 名称 Description 描述 Issuer Returns the name of the system that provided the claim 返回提供声明（Claim）的系统名称 Subject Returns the ClaimsIdentity object for the user who the claim refers to 返回声明（Claim）所指用户的ClaimsIdentity对象 Type Returns the type of information that the claim represents 返回声明（Claim）所表示的信息类型 Value Returns the piece of information that the claim represents 返回声明（Claim）所表示的信息片段 Listing 15-13 shows the contents of the Index.cshtml file that I created in the Views/Claims folder and that is rendered by the Index action of the Claims controller. The view adds a row to a table for each claim about the user. 清单15-13显示了我在Views/Claims文件夹中创建的Index.cshtml文件的内容，它由Claims控制器中的Index动作方法进行渲染。该视图为用户的每项声明（Claim）添加了一个表格行。 Listing 15-13. The Contents of the Index.cshtml File in the Views/Claims Folder 清单15-13. Views/Claims文件夹中Index.cshtml文件的内容 @using System.Security.Claims@using Users.Infrastructure@model IEnumerable<Claim>@{ ViewBag.Title = "Claims"; }<div class="panel panel-primary"><div class="panel-heading">Claims</div><table class="table table-striped"><tr><th>Subject</th><th>Issuer</th><th>Type</th><th>Value</th></tr>@foreach (Claim claim in Model.OrderBy(x => x.Type)) {<tr><td>@claim.Subject.Name</td><td>@claim.Issuer</td><td>@Html.ClaimType(claim.Type)</td><td>@claim.Value</td></tr>}</table></div> The value of the Claim.Type property is a URI for a Microsoft schema, which isn’t especially useful. The popular schemas are used as the values for fields in the System.Security.Claims.ClaimTypes class, so to make the output from the Index.cshtml view easier to read, I added an HTML helper to the IdentityHelpers.cs file, as shown in Listing 15-14. It is this helper that I use in the Index.cshtml file to format the value of the Claim.Type property. Claim.Type属性的值是一个微软模式（Microsoft Schema）的URI（统一资源标识符），这是特别有用的。System.Security.Claims.ClaimTypes类中字段的值使用的是流行模式（Popular Schema），因此为了使Index.cshtml视图的输出更易于阅读，我在IdentityHelpers.cs文件中添加了一个HTML辅助器，如清单15-14所示。Index.cshtml文件正是使用这个辅助器格式化了Claim.Type属性的值。 Listing 15-14. Adding a Helper to the IdentityHelpers.cs File 清单15-14. 在IdentityHelpers.cs文件中添加辅助器 using System.Web;using System.Web.Mvc;using Microsoft.AspNet.Identity.Owin;using System;using System.Linq;using System.Reflection;using System.Security.Claims;namespace Users.Infrastructure {public static class IdentityHelpers {public static MvcHtmlString GetUserName(this HtmlHelper html, string id) {AppUserManager mgr= HttpContext.Current.GetOwinContext().GetUserManager<AppUserManager>();return new MvcHtmlString(mgr.FindByIdAsync(id).Result.UserName);} public static MvcHtmlString ClaimType(this HtmlHelper html, string claimType) {FieldInfo[] fields = typeof(ClaimTypes).GetFields();foreach (FieldInfo field in fields) {if (field.GetValue(null).ToString() == claimType) {return new MvcHtmlString(field.Name);} }return new MvcHtmlString(string.Format("{0}",claimType.Split('/', '.').Last()));} }} Note The helper method isn’t at all efficient because it reflects on the fields of the ClaimType class for each claim that is displayed, but it is sufficient for my purposes in this chapter. You won’t often need to display the claim type in real applications. 注：该辅助器并非十分有效，因为它只是针对每个要显示的声明（Claim）映射出ClaimType类的字段，但对我要的目的已经足够了。在实际项目中不会经常需要显示声明（Claim）的类型。 To see why I have created a controller that uses claims without really explaining what they are, start the application, authenticate as the user Alice (with the password MySecret), and request the /Claims/Index URL. Figure 15-5 shows the content that is generated. 为了弄明白我为何要先创建一个使用声明（Claims）的控制器，而没有真正解释声明（Claims）是什么的原因，可以启动应用程序，以用户Alice进行认证（其口令是MySecret），并请求/Claims/Index URL。图15-5显示了生成的内容。 Figure 15-5. The output from the Index action of the Claims controller 图15-5. Claims控制器中Index动作的输出 It can be hard to make out the detail in the figure, so I have reproduced the content in Table 15-7. 这可能还难以认识到此图的细节，为此我在表15-7中重列了其内容。 Table 15-7. The Data Shown in Figure 15-5 表15-7. 图15-5中显示的数据 Subject（科目） Issuer（发行者） Type（类型） Value（值） Alice LOCAL AUTHORITY SecurityStamp Unique ID Alice LOCAL AUTHORITY IdentityProvider ASP.NET Identity Alice LOCAL AUTHORITY Role Employees Alice LOCAL AUTHORITY Role Users Alice LOCAL AUTHORITY Name Alice Alice LOCAL AUTHORITY NameIdentifier Alice’s user ID The table shows the most important aspect of claims, which is that I have already been using them when I implemented the traditional authentication and authorization features in Chapter 14. You can see that some of the claims relate to user identity (the Name claim is Alice, and the NameIdentifier claim is Alice’s unique user ID in my ASP.NET Identity database). 此表展示了声明（Claims）最重要的方面，这些是我在第14章中实现传统的认证和授权特性时，一直在使用的信息。可以看出，有些声明（Claims）与用户标识有关（Name声明是Alice，NameIdentifier声明是Alice在ASP.NET Identity数据库中的唯一用户ID号）。 Other claims show membership of roles—there are two Role claims in the table, reflecting the fact that Alice is assigned to both the Users and Employees roles. There is also a claim about how Alice has been authenticated: The IdentityProvider is set to ASP.NET Identity. 其他声明（Claims）显示了角色成员——表中有两个Role声明（Claim），体现出Alice被赋予了Users和Employees两个角色这一事实。还有一个是Alice已被认证的声明（Claim）：IdentityProvider被设置到了ASP.NET Identity。 The difference when this information is expressed as a set of claims is that you can determine where the data came from. The Issuer property for all the claims shown in the table is set to LOCAL AUTHORITY, which indicates that the user’s identity has been established by the application. 当这种信息被表示成一组声明（Claims）时的差别是，你能够确定这些数据是从哪里来的。表中所显示的所有声明的Issuer属性（发布者）都被设置到了LOACL AUTHORITY（本地授权），这说明该用户的标识是由应用程序建立的。 So, now that you have seen some example claims, I can more easily describe what a claim is. A claim is any piece of information about a user that is available to the application, including the user’s identity and role memberships. And, as you have seen, the information I have been defining about my users in earlier chapters is automatically made available as claims by ASP.NET Identity. 因此，现在你已经看到了一些声明（Claims）示例，我可以更容易地描述声明（Claim）是什么了。一项声明（Claim）是可用于应用程序中的有关用户的一个信息片段，包括用户的标识以及角色成员等。而且，正如你所看到的，我在前几章定义的关于用户的信息，被ASP.NET Identity自动地作为声明（Claims）了。 15.3.2 Creating and Using Claims 15.3.2 创建和使用声明（Claims） Claims are interesting for two reasons. The first reason is that an application can obtain claims from multiple sources, rather than just relying on a local database for information about the user. You will see a real example of this when I show you how to authenticate users through a third-party system in the “Using Third-Party Authentication” section, but for the moment I am going to add a class to the example project that simulates a system that provides claims information. Listing 15-15 shows the contents of the LocationClaimsProvider.cs file that I added to the Infrastructure folder. 声明（Claims）比较有意思的原因有两个。第一个原因是应用程序可以从多个来源获取声明（Claims），而不是只能依靠本地数据库关于用户的信息。你将会看到一个实际的示例，在“使用第三方认证”小节中，将演示如何通过第三方系统来认证用户。不过，此刻我只打算在示例项目中添加一个类，用以模拟一个提供声明（Claims）信息的系统。清单15-15显示了我添加到Infrastructure文件夹中LocationClaimsProvider.cs文件的内容。 Listing 15-15. The Contents of the LocationClaimsProvider.cs File 清单15-15. LocationClaimsProvider.cs文件的内容 using System.Collections.Generic;using System.Security.Claims; namespace Users.Infrastructure {public static class LocationClaimsProvider {public static IEnumerable<Claim> GetClaims(ClaimsIdentity user) {List<Claim> claims = new List<Claim>();if (user.Name.ToLower() == "alice") {claims.Add(CreateClaim(ClaimTypes.PostalCode, "DC 20500"));claims.Add(CreateClaim(ClaimTypes.StateOrProvince, "DC"));} else {claims.Add(CreateClaim(ClaimTypes.PostalCode, "NY 10036"));claims.Add(CreateClaim(ClaimTypes.StateOrProvince, "NY"));}return claims;}private static Claim CreateClaim(string type, string value) {return new Claim(type, value, ClaimValueTypes.String, "RemoteClaims");} }} The GetClaims method takes a ClaimsIdentity argument and uses the Name property to create claims about the user’s ZIP code and state. This class allows me to simulate a system such as a central HR database, which would be the authoritative source of location information about staff, for example. GetClaims方法以ClaimsIdentity为参数，并使用Name属性创建了关于用户ZIP码（邮政编码）和州府的声明（Claims）。上述这个类使我能够模拟一个诸如中心化的HR数据库（人力资源数据库）之类的系统，它可能会成为全体职员的地点信息的权威数据源。 Claims are associated with the user’s identity during the authentication process, and Listing 15-16 shows the changes I made to the Login action method of the Account controller to call the LocationClaimsProvider class. 在认证过程期间，声明（Claims）是与用户标识关联在一起的，清单15-16显示了我对Account控制器中Login动作方法所做的修改，以便调用LocationClaimsProvider类。 Listing 15-16. Associating Claims with a User in the AccountController.cs File 清单15-16. AccountController.cs文件中用户用声明的关联 ...[HttpPost][AllowAnonymous][ValidateAntiForgeryToken]public async Task<ActionResult> Login(LoginModel details, string returnUrl) {if (ModelState.IsValid) {AppUser user = await UserManager.FindAsync(details.Name,details.Password);if (user == null) {ModelState.AddModelError("", "Invalid name or password.");} else {ClaimsIdentity ident = await UserManager.CreateIdentityAsync(user,DefaultAuthenticationTypes.ApplicationCookie); ident.AddClaims(LocationClaimsProvider.GetClaims(ident));AuthManager.SignOut();AuthManager.SignIn(new AuthenticationProperties {IsPersistent = false}, ident);return Redirect(returnUrl);} }ViewBag.returnUrl = returnUrl;return View(details);}... You can see the effect of the location claims by starting the application, authenticating as a user, and requesting the /Claim/Index URL. Figure 15-6 shows the claims for Alice. You may have to sign out and sign back in again to see the change. 为了看看这个地点声明（Claims）的效果，可以启动应用程序，以一个用户进行认证，并请求/Claim/Index URL。图15-6显示了Alice的声明（Claims）。你可能需要退出，然后再次登录才会看到发生的变化。 Figure 15-6. Defining additional claims for users 图15-6. 定义用户的附加声明 Obtaining claims from multiple locations means that the application doesn’t have to duplicate data that is held elsewhere and allows integration of data from external parties. The Claim.Issuer property tells you where a claim originated from, which helps you judge how accurate the data is likely to be and how much weight you should give the data in your application. Location data obtained from a central HR database is likely to be more accurate and trustworthy than data obtained from an external mailing list provider, for example. 从多个地点获取声明（Claims）意味着应用程序不必复制其他地方保持的数据，并且能够与外部的数据集成。Claim.Issuer属性（图15-6中的Issuer数据列——译者注）能够告诉你一个声明（Claim）的发源地，这有助于让你判断数据的精确程度，也有助于让你决定这类数据在应用程序中的权重。例如，从中心化的HR数据库获取的地点数据可能要比外部邮件列表提供器获取的数据更为精确和可信。 1. Applying Claims 1. 运用声明（Claims） The second reason that claims are interesting is that you can use them to manage user access to your application more flexibly than with standard roles. The problem with roles is that they are static, and once a user has been assigned to a role, the user remains a member until explicitly removed. This is, for example, how long-term employees of big corporations end up with incredible access to internal systems: They are assigned the roles they require for each new job they get, but the old roles are rarely removed. (The unexpectedly broad systems access sometimes becomes apparent during the investigation into how someone was able to ship the contents of the warehouse to their home address—true story.) 声明（Claims）有意思的第二个原因是，你可以用它们来管理用户对应用程序的访问，这要比标准的角色管理更为灵活。角色的问题在于它们是静态的，而且一旦用户已经被赋予了一个角色，该用户便是一个成员，直到明确地删除为止。例如，这意味着大公司的长期雇员，对内部系统的访问会十分惊人：他们每次在获得新工作时，都会赋予所需的角色，但旧角色很少被删除。（在调查某人为何能够将仓库里的东西发往他的家庭地址过程中发现，有时会出现异常宽泛的系统访问——真实的故事） Claims can be used to authorize users based directly on the information that is known about them, which ensures that the authorization changes when the data changes. The simplest way to do this is to generate Role claims based on user data that are then used by controllers to restrict access to action methods. Listing 15-17 shows the contents of the ClaimsRoles.cs file that I added to the Infrastructure. 声明（Claims）可以直接根据用户已知的信息对用户进行授权，这能够保证当数据发生变化时，授权也随之而变。此事最简单的做法是根据用户数据来生成Role声明（Claim），然后由控制器用来限制对动作方法的访问。清单15-17显示了我添加到Infrastructure中的ClaimsRoles.cs文件的内容。 Listing 15-17. The Contents of the ClaimsRoles.cs File 清单15-17. ClaimsRoles.cs文件的内容 using System.Collections.Generic;using System.Security.Claims; namespace Users.Infrastructure {public class ClaimsRoles {public static IEnumerable<Claim> CreateRolesFromClaims(ClaimsIdentity user) {List<Claim> claims = new List<Claim>();if (user.HasClaim(x => x.Type == ClaimTypes.StateOrProvince&& x.Issuer == "RemoteClaims" && x.Value == "DC")&& user.HasClaim(x => x.Type == ClaimTypes.Role&& x.Value == "Employees")) {claims.Add(new Claim(ClaimTypes.Role, "DCStaff"));}return claims;} }} The gnarly looking CreateRolesFromClaims method uses lambda expressions to determine whether the user has a StateOrProvince claim from the RemoteClaims issuer with a value of DC and a Role claim with a value of Employees. If the user has both claims, then a Role claim is returned for the DCStaff role. Listing 15-18 shows how I call the CreateRolesFromClaims method from the Login action in the Account controller. CreateRolesFromClaims是一个粗糙的考察方法，它使用了Lambda表达式，以检查用户是否具有StateOrProvince声明（Claim），该声明来自于RemoteClaims发行者（Issuer），值为DC。也检查用户是否具有Role声明（Claim），其值为Employees。如果用户这两个声明都有，那么便返回一个DCStaff角色的Role声明。清单15-18显示了如何在Account控制器中的Login动作中调用CreateRolesFromClaims方法。 Listing 15-18. Generating Roles Based on Claims in the AccountController.cs File 清单15-18. 在AccountController.cs中根据声明生成角色 ...[HttpPost][AllowAnonymous][ValidateAntiForgeryToken]public async Task<ActionResult> Login(LoginModel details, string returnUrl) {if (ModelState.IsValid) {AppUser user = await UserManager.FindAsync(details.Name,details.Password);if (user == null) {ModelState.AddModelError("", "Invalid name or password.");} else {ClaimsIdentity ident = await UserManager.CreateIdentityAsync(user,DefaultAuthenticationTypes.ApplicationCookie);ident.AddClaims(LocationClaimsProvider.GetClaims(ident)); ident.AddClaims(ClaimsRoles.CreateRolesFromClaims(ident));AuthManager.SignOut();AuthManager.SignIn(new AuthenticationProperties {IsPersistent = false}, ident);return Redirect(returnUrl);} }ViewBag.returnUrl = returnUrl;return View(details);}... I can then restrict access to an action method based on membership of the DCStaff role. Listing 15-19 shows a new action method I added to the Claims controller to which I have applied the Authorize attribute. 然后我可以根据DCStaff角色的成员，来限制对一个动作方法的访问。清单15-19显示了在Claims控制器中添加的一个新的动作方法，在该方法上已经运用了Authorize注解属性。 Listing 15-19. Adding a New Action Method to the ClaimsController.cs File 清单15-19. 在ClaimsController.cs文件中添加一个新的动作方法 using System.Security.Claims;using System.Web;using System.Web.Mvc;namespace Users.Controllers {public class ClaimsController : Controller {[Authorize]public ActionResult Index() {ClaimsIdentity ident = HttpContext.User.Identity as ClaimsIdentity;if (ident == null) {return View("Error", new string[] { "No claims available" });} else {return View(ident.Claims);} } [Authorize(Roles="DCStaff")]public string OtherAction() {return "This is the protected action";} }} Users will be able to access OtherAction only if their claims grant them membership to the DCStaff role. Membership of this role is generated dynamically, so a change to the user’s employment status or location information will change their authorization level. 只要用户的声明（Claims）承认他们是DCStaff角色的成员，那么他们便能访问OtherAction动作。该角色的成员是动态生成的，因此，若是用户的雇用状态或地点信息发生变化，也会改变他们的授权等级。 提示：请读者从这个例子中吸取其中的思想精髓。对于读物的理解程度，仁者见仁，智者见智，能领悟多少，全凭各人，译者感觉这里的思想有无数的可能。举例说明：（1）可以根据用户的身份进行授权，比如学生在校时是“学生”，毕业后便是“校友”；（2）可以根据用户所处的部门进行授权，人事部用户属于人事团队，销售部用户属于销售团队，各团队有其自己的应用；（3）下一小节的示例是根据用户的地点授权。简言之：一方面用户的各种声明（Claim）都可以用来进行授权；另一方面用户的声明（Claim）又是可以自定义的。于是可能的运用就无法估计了。总之一句话，这种基于声明的授权（Claims-Based Authorization）有无限可能！要是没有我这里的提示，是否所有读者在此处都会有所体会？——译者注 15.3.3 Authorizing Access Using Claims 15.3.3 使用声明（Claims）授权访问 The previous example is an effective demonstration of how claims can be used to keep authorizations fresh and accurate, but it is a little indirect because I generate roles based on claims data and then enforce my authorization policy based on the membership of that role. A more direct and flexible approach is to enforce authorization directly by creating a custom authorization filter attribute. Listing 15-20 shows the contents of the ClaimsAccessAttribute.cs file, which I added to the Infrastructure folder and used to create such a filter. 前面的示例有效地演示了如何用声明（Claims）来保持新鲜和准确的授权，但有点不太直接，因为我要根据声明（Claims）数据来生成了角色，然后强制我的授权策略基于角色成员。一个更直接且灵活的办法是直接强制授权，其做法是创建一个自定义的授权过滤器注解属性。清单15-20演示了ClaimsAccessAttribute.cs文件的内容，我将它添加在Infrastructure文件夹中，并用它创建了这种过滤器。 Listing 15-20. The Contents of the ClaimsAccessAttribute.cs File 清单15-20. ClaimsAccessAttribute.cs文件的内容 using System.Security.Claims;using System.Web;using System.Web.Mvc; namespace Users.Infrastructure {public class ClaimsAccessAttribute : AuthorizeAttribute {public string Issuer { get; set; }public string ClaimType { get; set; }public string Value { get; set; }protected override bool AuthorizeCore(HttpContextBase context) {return context.User.Identity.IsAuthenticated&& context.User.Identity is ClaimsIdentity&& ((ClaimsIdentity)context.User.Identity).HasClaim(x =>x.Issuer == Issuer && x.Type == ClaimType && x.Value == Value);} }} The attribute I have defined is derived from the AuthorizeAttribute class, which makes it easy to create custom authorization policies in MVC framework applications by overriding the AuthorizeCore method. My implementation grants access if the user is authenticated, the IIdentity implementation is an instance of ClaimsIdentity, and the user has a claim with the issuer, type, and value matching the class properties. Listing 15-21 shows how I applied the attribute to the Claims controller to authorize access to the OtherAction method based on one of the location claims created by the LocationClaimsProvider class. 我所定义的这个注解属性派生于AuthorizeAttribute类，通过重写AuthorizeCore方法，很容易在MVC框架应用程序中创建自定义的授权策略。在这个实现中，若用户是已认证的、其IIdentity实现是一个ClaimsIdentity实例，而且该用户有一个带有issuer、type以及value的声明（Claim），它们与这个类的属性是匹配的，则该用户便是允许访问的。清单15-21显示了如何将这个注解属性运用于Claims控制器，以便根据LocationClaimsProvider类创建的地点声明（Claim），对OtherAction方法进行授权访问。 Listing 15-21. Performing Authorization on Claims in the ClaimsController.cs File 清单15-21. 在ClaimsController.cs文件中执行基于声明的授权 using System.Security.Claims;using System.Web;using System.Web.Mvc;using Users.Infrastructure;namespace Users.Controllers {public class ClaimsController : Controller {[Authorize]public ActionResult Index() {ClaimsIdentity ident = HttpContext.User.Identity as ClaimsIdentity;if (ident == null) {return View("Error", new string[] { "No claims available" });} else {return View(ident.Claims);} } [ClaimsAccess(Issuer="RemoteClaims", ClaimType=ClaimTypes.PostalCode,Value="DC 20500")]public string OtherAction() {return "This is the protected action";} }} My authorization filter ensures that only users whose location claims specify a ZIP code of DC 20500 can invoke the OtherAction method. 这个授权过滤器能够确保只有地点声明（Claim）的邮编为DC 20500的用户才能请求OtherAction方法。 15.4 Using Third-Party Authentication 15.4 使用第三方认证 One of the benefits of a claims-based system such as ASP.NET Identity is that any of the claims can come from an external system, even those that identify the user to the application. This means that other systems can authenticate users on behalf of the application, and ASP.NET Identity builds on this idea to make it simple and easy to add support for authenticating users through third parties such as Microsoft, Google, Facebook, and Twitter. 基于声明的系统，如ASP.NET Identity，的好处之一是任何声明都可以来自于外部系统，即使是将用户标识到应用程序的那些声明。这意味着其他系统可以代表应用程序来认证用户，而ASP.NET Identity就建立在这样的思想之上，使之能够简单而方便地添加第三方认证用户的支持，如微软、Google、Facebook、Twitter等。 There are some substantial benefits of using third-party authentication: Many users will already have an account, users can elect to use two-factor authentication, and you don’t have to manage user credentials in the application. In the sections that follow, I’ll show you how to set up and use third-party authentication for Google users, which Table 15-8 puts into context. 使用第三方认证有一些实际的好处：许多用户已经有了账号、用户可以选择使用双因子认证、你不必在应用程序中管理用户凭据等等。在以下小节中，我将演示如何为Google用户建立并使用第三方认证，表15-8描述了事情的情形。 Table 15-8. Putting Third-Party Authentication in Context 表15-8. 第三方认证情形 Question 问题 Answer 回答 What is it? 什么是第三方认证？ Authenticating with third parties lets you take advantage of the popularity of companies such as Google and Facebook. 第三方认证使你能够利用流行公司，如Google和Facebook，的优势。 Why should I care? 为何要关心它？ Users don’t like having to remember passwords for many different sites. Using a provider with large-scale adoption can make your application more appealing to users of the provider’s services. 用户不喜欢记住许多不同网站的口令。使用大范围适应的提供器可使你的应用程序更吸引有提供器服务的用户。 How is it used by the MVC framework? 如何在MVC框架中使用它？ This feature isn’t used directly by the MVC framework. 这不是一个直接由MVC框架使用的特性。 Note The reason I have chosen to demonstrate Google authentication is that it is the only option that doesn’t require me to register my application with the authentication service. You can get details of the registration processes required at http://bit.ly/1cqLTrE. 提示：我选择演示Google认证的原因是，它是唯一不需要在其认证服务中注册我应用程序的公司。有关认证服务注册过程的细节，请参阅http://bit.ly/1cqLTrE。 15.4.1 Enabling Google Authentication 15.4.1 启用Google认证 ASP.NET Identity comes with built-in support for authenticating users through their Microsoft, Google, Facebook, and Twitter accounts as well more general support for any authentication service that supports OAuth. The first step is to add the NuGet package that includes the Google-specific additions for ASP.NET Identity. Enter the following command into the Package Manager Console: ASP.NET Identity带有通过Microsoft、Google、Facebook以及Twitter账号认证用户的内建支持，并且对于支持OAuth的认证服务具有更普遍的支持。第一个步骤是添加NuGet包，包中含有用于ASP.NET Identity的Google专用附件。请在“Package Manager Console（包管理器控制台）”中输入以下命令： Install-Package Microsoft.Owin.Security.Google -version 2.0.2 There are NuGet packages for each of the services that ASP.NET Identity supports, as described in Table 15-9. 对于ASP.NET Identity支持的每一种服务都有相应的NuGet包，如表15-9所示。 Table 15-9. The NuGet Authenticaton Packages 表15-9. NuGet认证包 Name 名称 Description 描述 Microsoft.Owin.Security.Google Authenticates users with Google accounts 用Google账号认证用户 Microsoft.Owin.Security.Facebook Authenticates users with Facebook accounts 用Facebook账号认证用户 Microsoft.Owin.Security.Twitter Authenticates users with Twitter accounts 用Twitter账号认证用户 Microsoft.Owin.Security.MicrosoftAccount Authenticates users with Microsoft accounts 用Microsoft账号认证用户 Microsoft.Owin.Security.OAuth Authenticates users against any OAuth 2.0 service 根据任一OAuth 2.0服务认证用户 Once the package is installed, I enable support for the authentication service in the OWIN startup class, which is defined in the App_Start/IdentityConfig.cs file in the example project. Listing 15-22 shows the change that I have made. 一旦安装了这个包，便可以在OWIN启动类中启用此项认证服务的支持，启动类的定义在示例项目的App_Start/IdentityConfig.cs文件中。清单15-22显示了所做的修改。 Listing 15-22. Enabling Google Authentication in the IdentityConfig.cs File 清单15-22. 在IdentityConfig.cs文件中启用Google认证 using Microsoft.AspNet.Identity;using Microsoft.Owin;using Microsoft.Owin.Security.Cookies;using Owin;using Users.Infrastructure;using Microsoft.Owin.Security.Google;namespace Users {public class IdentityConfig {public void Configuration(IAppBuilder app) {app.CreatePerOwinContext<AppIdentityDbContext>(AppIdentityDbContext.Create);app.CreatePerOwinContext<AppUserManager>(AppUserManager.Create);app.CreatePerOwinContext<AppRoleManager>(AppRoleManager.Create); app.UseCookieAuthentication(new CookieAuthenticationOptions {AuthenticationType = DefaultAuthenticationTypes.ApplicationCookie,LoginPath = new PathString("/Account/Login"),}); app.UseExternalSignInCookie(DefaultAuthenticationTypes.ExternalCookie);app.UseGoogleAuthentication();} }} Each of the packages that I listed in Table 15-9 contains an extension method that enables the corresponding service. The extension method for the Google service is called UseGoogleAuthentication, and it is called on the IAppBuilder implementation that is passed to the Configuration method. 表15-9所列的每个包都含有启用相应服务的扩展方法。用于Google服务的扩展方法名称为UseGoogleAuthentication，它通过传递给Configuration方法的IAppBuilder实现进行调用。 Next I added a button to the Views/Account/Login.cshtml file, which allows users to log in via Google. You can see the change in Listing 15-23. 下一步骤是在Views/Account/Login.cshtml文件中添加一个按钮，让用户能够通过Google进行登录。所做的修改如清单15-23所示。 Listing 15-23. Adding a Google Login Button to the Login.cshtml File 清单15-23. 在Login.cshtml文件中添加Google登录按钮 @model Users.Models.LoginModel@{ ViewBag.Title = "Login";}<h2>Log In</h2> @Html.ValidationSummary()@using (Html.BeginForm()) {@Html.AntiForgeryToken();<input type="hidden" name="returnUrl" value="@ViewBag.returnUrl" /><div class="form-group"><label>Name</label>@Html.TextBoxFor(x => x.Name, new { @class = "form-control" })</div><div class="form-group"><label>Password</label>@Html.PasswordFor(x => x.Password, new { @class = "form-control" })</div><button class="btn btn-primary" type="submit">Log In</button>}@using (Html.BeginForm("GoogleLogin", "Account")) {<input type="hidden" name="returnUrl" value="@ViewBag.returnUrl" /><button class="btn btn-primary" type="submit">Log In via Google</button>} The new button submits a form that targets the GoogleLogin action on the Account controller. You can see this method—and the other changes I made the controller—in Listing 15-24. 新按钮递交一个表单，目标是Account控制器中的GoogleLogin动作。可从清单15-24中看到该方法，以及在控制器中所做的其他修改。 Listing 15-24. Adding Support for Google Authentication to the AccountController.cs File 清单15-24. 在AccountController.cs文件中添加Google认证支持 using System.Threading.Tasks;using System.Web.Mvc;using Users.Models;using Microsoft.Owin.Security;using System.Security.Claims;using Microsoft.AspNet.Identity;using Microsoft.AspNet.Identity.Owin;using Users.Infrastructure;using System.Web; namespace Users.Controllers {[Authorize]public class AccountController : Controller {[AllowAnonymous]public ActionResult Login(string returnUrl) {if (HttpContext.User.Identity.IsAuthenticated) {return View("Error", new string[] { "Access Denied" });}ViewBag.returnUrl = returnUrl;return View();}[HttpPost][AllowAnonymous][ValidateAntiForgeryToken]public async Task<ActionResult> Login(LoginModel details, string returnUrl) {if (ModelState.IsValid) {AppUser user = await UserManager.FindAsync(details.Name,details.Password);if (user == null) {ModelState.AddModelError("", "Invalid name or password.");} else {ClaimsIdentity ident = await UserManager.CreateIdentityAsync(user,DefaultAuthenticationTypes.ApplicationCookie); ident.AddClaims(LocationClaimsProvider.GetClaims(ident));ident.AddClaims(ClaimsRoles.CreateRolesFromClaims(ident)); AuthManager.SignOut();AuthManager.SignIn(new AuthenticationProperties {IsPersistent = false}, ident);return Redirect(returnUrl);} }ViewBag.returnUrl = returnUrl;return View(details);} [HttpPost][AllowAnonymous]public ActionResult GoogleLogin(string returnUrl) {var properties = new AuthenticationProperties {RedirectUri = Url.Action("GoogleLoginCallback",new { returnUrl = returnUrl})};HttpContext.GetOwinContext().Authentication.Challenge(properties, "Google");return new HttpUnauthorizedResult();}[AllowAnonymous]public async Task<ActionResult> GoogleLoginCallback(string returnUrl) {ExternalLoginInfo loginInfo = await AuthManager.GetExternalLoginInfoAsync();AppUser user = await UserManager.FindAsync(loginInfo.Login);if (user == null) {user = new AppUser {Email = loginInfo.Email,UserName = loginInfo.DefaultUserName,City = Cities.LONDON, Country = Countries.UK};IdentityResult result = await UserManager.CreateAsync(user);if (!result.Succeeded) {return View("Error", result.Errors);} else {result = await UserManager.AddLoginAsync(user.Id, loginInfo.Login);if (!result.Succeeded) {return View("Error", result.Errors);} }}ClaimsIdentity ident = await UserManager.CreateIdentityAsync(user,DefaultAuthenticationTypes.ApplicationCookie);ident.AddClaims(loginInfo.ExternalIdentity.Claims);AuthManager.SignIn(new AuthenticationProperties {IsPersistent = false }, ident);return Redirect(returnUrl ?? "/");}[Authorize]public ActionResult Logout() {AuthManager.SignOut();return RedirectToAction("Index", "Home");}private IAuthenticationManager AuthManager {get {return HttpContext.GetOwinContext().Authentication;} }private AppUserManager UserManager {get {return HttpContext.GetOwinContext().GetUserManager<AppUserManager>();} }} } The GoogleLogin method creates an instance of the AuthenticationProperties class and sets the RedirectUri property to a URL that targets the GoogleLoginCallback action in the same controller. The next part is a magic phrase that causes ASP.NET Identity to respond to an unauthorized error by redirecting the user to the Google authentication page, rather than the one defined by the application: GoogleLogin方法创建了AuthenticationProperties类的一个实例，并为RedirectUri属性设置了一个URL，其目标为同一控制器中的GoogleLoginCallback动作。下一个部分是一个神奇阶段，通过将用户重定向到Google认证页面，而不是应用程序所定义的认证页面，让ASP.NET Identity对未授权的错误进行响应： ...HttpContext.GetOwinContext().Authentication.Challenge(properties, "Google");return new HttpUnauthorizedResult();... This means that when the user clicks the Log In via Google button, their browser is redirected to the Google authentication service and then redirected back to the GoogleLoginCallback action method once they are authenticated. 这意味着，当用户通过点击Google按钮进行登录时，浏览器被重定向到Google的认证服务，一旦在那里认证之后，便被重定向回GoogleLoginCallback动作方法。 I get details of the external login by calling the GetExternalLoginInfoAsync of the IAuthenticationManager implementation, like this: 我通过调用IAuthenticationManager实现的GetExternalLoginInfoAsync方法，我获得了外部登录的细节，如下所示： ...ExternalLoginInfo loginInfo = await AuthManager.GetExternalLoginInfoAsync();... The ExternalLoginInfo class defines the properties shown in Table 15-10. ExternalLoginInfo类定义的属性如表15-10所示： Table 15-10. The Properties Defined by the ExternalLoginInfo Class 表15-10. ExternalLoginInfo类所定义的属性 Name 名称 Description 描述 DefaultUserName Returns the username 返回用户名 Email Returns the e-mail address 返回E-mail地址 ExternalIdentity Returns a ClaimsIdentity that identities the user 返回标识该用户的ClaimsIdentity Login Returns a UserLoginInfo that describes the external login 返回描述外部登录的UserLoginInfo I use the FindAsync method defined by the user manager class to locate the user based on the value of the ExternalLoginInfo.Login property, which returns an AppUser object if the user has been authenticated with the application before: 我使用了由用户管理器类所定义的FindAsync方法，以便根据ExternalLoginInfo.Login属性的值对用户进行定位，如果用户之前在应用程序中已经认证，该属性会返回一个AppUser对象： ...AppUser user = await UserManager.FindAsync(loginInfo.Login);... If the FindAsync method doesn’t return an AppUser object, then I know that this is the first time that this user has logged into the application, so I create a new AppUser object, populate it with values, and save it to the database. I also save details of how the user logged in so that I can find them next time: 如果FindAsync方法返回的不是AppUser对象，那么我便知道这是用户首次登录应用程序，于是便创建了一个新的AppUser对象，填充该对象的值，并将其保存到数据库。我还保存了用户如何登录的细节，以便下次能够找到他们： ...result = await UserManager.AddLoginAsync(user.Id, loginInfo.Login);... All that remains is to generate an identity the user, copy the claims provided by Google, and create an authentication cookie so that the application knows the user has been authenticated: 剩下的事情只是生成该用户的标识了，拷贝Google提供的声明（Claims），并创建一个认证Cookie，以使应用程序知道此用户已认证： ...ClaimsIdentity ident = await UserManager.CreateIdentityAsync(user,DefaultAuthenticationTypes.ApplicationCookie);ident.AddClaims(loginInfo.ExternalIdentity.Claims);AuthManager.SignIn(new AuthenticationProperties { IsPersistent = false }, ident);... 15.4.2 Testing Google Authentication 15.4.2 测试Google认证 There is one further change that I need to make before I can test Google authentication: I need to change the account verification I set up in Chapter 13 because it prevents accounts from being created with e-mail addresses that are not within the example.com domain. Listing 15-25 shows how I removed the verification from the AppUserManager class. 在测试Google认证之前还需要一处修改：需要修改第13章所建立的账号验证，因为它不允许example.com域之外的E-mail地址创建账号。清单15-25显示了如何在AppUserManager类中删除这种验证。 Listing 15-25. Disabling Account Validation in the AppUserManager.cs File 清单15-25. 在AppUserManager.cs文件中取消账号验证 using Microsoft.AspNet.Identity;using Microsoft.AspNet.Identity.EntityFramework;using Microsoft.AspNet.Identity.Owin;using Microsoft.Owin;using Users.Models; namespace Users.Infrastructure {public class AppUserManager : UserManager<AppUser> {public AppUserManager(IUserStore<AppUser> store): base(store) {}public static AppUserManager Create(IdentityFactoryOptions<AppUserManager> options,IOwinContext context) {AppIdentityDbContext db = context.Get<AppIdentityDbContext>();AppUserManager manager = new AppUserManager(new UserStore<AppUser>(db)); manager.PasswordValidator = new CustomPasswordValidator {RequiredLength = 6,RequireNonLetterOrDigit = false,RequireDigit = false,RequireLowercase = true,RequireUppercase = true}; //manager.UserValidator = new CustomUserValidator(manager) {// AllowOnlyAlphanumericUserNames = true,// RequireUniqueEmail = true//};return manager;} }} Tip you can use validation for externally authenticated accounts, but I am just going to disable the feature for simplicity. 提示：也可以使用外部已认证账号的验证，但这里出于简化，取消了这一特性。 To test authentication, start the application, click the Log In via Google button, and provide the credentials for a valid Google account. When you have completed the authentication process, your browser will be redirected back to the application. If you navigate to the /Claims/Index URL, you will be able to see how claims from the Google system have been added to the user’s identity, as shown in Figure 15-7. 为了测试认证，启动应用程序，通过点击“Log In via Google（通过Google登录）”按钮，并提供有效的Google账号凭据。当你完成了认证过程时，浏览器将被重定向回应用程序。如果导航到/Claims/Index URL，便能够看到来自Google系统的声明（Claims），已被添加到用户的标识中了，如图15-7所示。 Figure 15-7. Claims from Google 图15-7. 来自Google的声明（Claims） 15.5 Summary 15.5 小结 In this chapter, I showed you some of the advanced features that ASP.NET Identity supports. I demonstrated the use of custom user properties and how to use database migrations to preserve data when you upgrade the schema to support them. I explained how claims work and how they can be used to create more flexible ways of authorizing users. I finished the chapter by showing you how to authenticate users via Google, which builds on the ideas behind the use of claims. 本章向你演示了ASP.NET Identity所支持的一些高级特性。演示了自定义用户属性的使用，还演示了在升级数据架构时，如何使用数据库迁移保护数据。我解释了声明（Claims）的工作机制，以及如何将它们用于创建更灵活的用户授权方式。最后演示了如何通过Google进行认证结束了本章，这是建立在使用声明（Claims）的思想基础之上的。 本篇文章为转载内容。原文链接：https://blog.csdn.net/gz19871113/article/details/108591802。 该文由互联网用户投稿提供，文中观点代表作者本人意见，并不代表本站的立场。 作为信息平台，本站仅提供文章转载服务，并不拥有其所有权，也不对文章内容的真实性、准确性和合法性承担责任。 如发现本文存在侵权、违法、违规或事实不符的情况，请及时联系我们，我们将第一时间进行核实并删除相应内容。

...类型。不同的游戏类型可见1.2节。 译注：按一般说法，2005年至今属于第7个游戏机世代。这3款游戏机的发行年份为Xbox 360（2005）、PlayStation 3（2006）、Wii（2006）。有关游戏机世代可参考维基百科。 译注：Jeff Lander现时为Darwin 3D公司的首席技术总监、Game Tech公司创始人，曾为艺电首席程序员、Luxoflux公司游戏性及动画技术程序员。 译注：Matthew Whiting现时为Wholesale Algorithms公司程序员，曾为Luxoflux公司首席软件工程师、Insomniac Games公司程序员。 序言 欢迎来到《游戏引擎架构》世界。本书旨在全面探讨典型商业游戏引擎的主要组件。游戏编程是一个庞大的主题，有许多内容需要讨论。不过相信你会发现，我们讨论的深度将足以使你充分理解本书所涵盖的工程理论及常用实践的方方面面。话虽如此，令人着迷的漫长游戏编程之旅其实才刚刚启程。与此相关的每项技术都包含丰富内容，本书将为你打下基础，并引领你进入更广阔的学习空间。 本书焦点在于游戏引擎的技术及架构。我们会探讨商业游戏引擎中，各个子系统的相关理论，以及实现这些理论所需要的典型数据结构、算法和软件接口。游戏引擎与游戏的界限颇为模糊。我们将把注意力集中在引擎本身，包括多个低阶基础系统（low-level foundation system）、渲染引擎（rendering engine）、碰撞系统（collision system）、物理模拟（physics simulation）、人物动画（character animation），及一个我称为游戏性基础层（gameplay foundation layer）的深入讨论。此层包括游戏对象模型（game object model）、世界编辑器（world editor）、事件系统（event system）及脚本系统（scripting system）。我们也将会接触游戏性编程（gameplay programming）的多个方面，包括玩家机制（player mechanics）、摄像机（camera）及人工智能（artificial intelligence，AI）。然而，这类讨论会被限制在游戏性系统和引擎接口范围。 本书可以作为大学中等级游戏程序设计中两到三门课程的教材。当然，本书也适合软件工程师、业余爱好者、自学的游戏程序员，以及游戏行业从业人员。通过阅读本书，资历较浅的游戏程序员可以巩固他们所学的游戏数学、引擎架构及游戏科技方面的知识。专注某一领域的资深程序员也能从本书更为全面的介绍中获益。 为了更好地学习本书内容，你需要掌握基本的面向对象编程概念并至少拥有一些C++编程经验。尽管游戏行业已经开始尝试使用一些新的、令人兴奋的编程语言，然而工业级的3D游戏引擎仍然是用C或C++编写的，任何认真的游戏程序员都应该掌握C++。我们将在第3章重温一些面向对象编程的基本原则，毫无疑问，你还会从本书学到一些C++的小技巧，不过C++的基础最好还是通过阅读[39]、[31]及[32]来获得。如果你对C++已经有点生疏，建议你在阅读本书的同时，最好能重温这几本或者类似书籍。如果你完全没有C++经验，在看本书之前，可以考虑先阅读[39]的前几章，或者尝试学习一些C++的在线教程。 学习编程技能最好的方法就是写代码。在阅读本书时，强烈建议你选择一些特别感兴趣的主题付诸实践。举例来说，如果你觉得人物动画很有趣，那么可以首先安装OGRE，并测试一下它的蒙皮动画示范。接着还可以尝试用OGRE实现本书谈及的一些动画混合技巧。下一步你可能会打算用游戏手柄控制人物在平面上行走。等你能玩转一些简单的东西了，就应该以此为基础，继续前进！之后可以转移到另一个游戏技术范畴，周而复始。这些项目是什么并不重要，重要的是你在实践游戏编程的艺术，而不是纸上谈兵。 游戏科技是一个活生生、会呼吸的家伙 ，永远不可能将之束缚于书本之上 。因此，附加的资源、勘误、更新、示例代码、项目构思等已经发到本书的网站。 目录 推荐序1 iii推荐序2 v译序 vii序言 xvii前言 xix致谢 xxi第一部分 基础 1第1章 导论 31.1 典型游戏团队的结构 41.2 游戏是什么 71.3 游戏引擎是什么 101.4 不同游戏类型中的引擎差异 111.5 游戏引擎概观 221.6 运行时引擎架构 271.7 工具及资产管道 46第2章 专业工具 532.1 版本控制 532.2 微软Visual Studio 612.3 剖析工具 782.4 内存泄漏和损坏检测 792.5 其他工具 80第3章 游戏软件工程基础 833.1 重温C++及最佳实践 833.2 C/C++的数据、代码及内存 903.3 捕捉及处理错误 118第4章 游戏所需的三维数学 1254.1 在二维中解决三维问题 1254.2 点和矢量 1254.3 矩阵 1394.4 四元数 1564.5 比较各种旋转表达方式 1644.6 其他数学对象 1684.7 硬件加速的SIMD运算 1734.8 产生随机数 180第二部分 低阶引擎系统 183第5章 游戏支持系统 1855.1 子系统的启动和终止 1855.2 内存管理 1935.3 容器 2085.4 字符串 2255.5 引擎配置 234第6章 资源及文件系统 2416.1 文件系统 2416.2 资源管理器 251第7章 游戏循环及实时模拟 2777.1 渲染循环 2777.2 游戏循环 2787.3 游戏循环的架构风格 2807.4 抽象时间线 2837.5 测量及处理时间 2857.6 多处理器的游戏循环 2967.7 网络多人游戏循环 304第8章 人体学接口设备（HID） 3098.1 各种人体学接口设备 3098.2 人体学接口设备的接口技术 3118.3 输入类型 3128.4 输出类型 3168.5 游戏引擎的人体学接口设备系统 3188.6 人体学接口设备使用实践 332第9章 调试及开发工具 3339.1 日志及跟踪 3339.2 调试用的绘图功能 3379.3 游戏内置菜单 3449.4 游戏内置主控台 3479.5 调试用摄像机和游戏暂停 3489.6 作弊 3489.7 屏幕截图及录像 3499.8 游戏内置性能剖析 3499.9 游戏内置的内存统计和泄漏检测 356第三部分 图形及动画 359第10章 渲染引擎 36110.1 采用深度缓冲的三角形光栅化基础 36110.2 渲染管道 40410.3 高级光照及全局光照 42610.4 视觉效果和覆盖层 43810.5 延伸阅读 446第11章 动画系统 44711.1 角色动画的类型 44711.2 骨骼 45211.3 姿势 45411.4 动画片段 45911.5 蒙皮及生成矩阵调色板 47111.6 动画混合 47611.7 后期处理 49311.8 压缩技术 49611.9 动画系统架构 50111.10 动画管道 50211.11 动作状态机 51511.12 动画控制器 535第12章 碰撞及刚体动力学 53712.1 你想在游戏中加入物理吗 53712.2 碰撞/物理中间件 54212.3 碰撞检测系统 54412.4 刚体动力学 56912.5 整合物理引擎至游戏 60112.6 展望：高级物理功能 616第四部分 游戏性 617第13章 游戏性系统简介 61913.1 剖析游戏世界 61913.2 实现动态元素：游戏对象 62313.3 数据驱动游戏引擎 62613.4 游戏世界编辑器 627第14章 运行时游戏性基础系统 63714.1 游戏性基础系统的组件 63714.2 各种运行时对象模型架构 64014.3 世界组块的数据格式 65714.4 游戏世界的加载和串流 66314.5 对象引用与世界查询 67014.6 实时更新游戏对象 67614.7 事件与消息泵 69014.8 脚本 70714.9 高层次的游戏流程 726第五部分 总结 727第15章 还有更多内容吗 72915.1 一些未谈及的引擎系统 72915.2 游戏性系统 730参考文献 733中文索引 737英文索引 755 参考文献 Tomas Akenine-Moller, Eric Haines, and Naty Hoffman. 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London, England: Faber & Faber, 2002. 中译本：《原动画基础教程：动画人的生存手册》，邓晓娥译，中国青年出版社，2006. 勘误 第1次印册（2014年2月） P.xviii: 译注中 Wholesale Algoithms -> Wholesale Algorithms P.10: 最后一段第一行 微软的媒体播放器 -> 微软的Windows Media Player (多谢读者OpenGPU来函指正) P.15: 1.4.3节第三点 按妞 -> 按钮 (多谢读者一个小小凡人来函指正) P.40: 正文最后一行 按扭 -> 按钮 P.50: 1.7.8节第二节第一行 同是 -> 同时 (多谢读者czfdd来函指正) P.98: 代码 writeExampleStruct(Example& ex, Stream& ex) 中 Stream& ex -> Stream& stream (多谢读者Snow来函指正) P.106: 第一段中有六处 BBS -> BSS，最后一段代码的注释也有同样错误 (多谢读者trout来函指正) P.119: 译注中 软体工程 -> 软件工程 (多谢读者Snow来函指正) P.214: 正文第一段有两处 虚内存 -> 虚拟内存 (多谢读者Snow来函指正) P.216: 脚注24应标明为译注 (多谢读者Snow来函指正) P.221: 第一段代码的第二个断言应为 ASSERT(link.m_pPrev != NULL); (多谢读者Snow来函指正) P.230: 5.4.4.1节 第二段 软体 -> 软件 P.286: 脚注4应标明为译注 (多谢读者Snow来函指正) P.322: 第二段 按扭事件字 -> 按钮事件 P.349: 9.8节第二段第二行两处 部析器 -> 剖析器 (多谢读者Snow来函指正) P.738-572: 双数页页眉 参考文献 -> 中文索引 P.755-772: 双数页页眉 参考文献 -> 英文索引 P.755: kd tree项应归入K而不是Symbols 以上的错误已于第2次印册中修正。 第2次印册及之前 P.11: 第四行 细致程度 -> 层次细节 (这是level-of-detail/LOD的内地通译，多谢读者OpenGPU来函指正) P.12: 正文第一段及图1.2标题 使命之唤 -> 使命召唤 (多谢读者OpenGPU来函指正) P.12: 正文第一段 战栗时空 -> 半条命 (多谢读者OpenGPU来函指正) P.16: 第一点 表面下散射 -> 次表面散射 (多谢读者OpenGPU来函指正) P.17: 1.4.4节第五行 次文化 -> 亚文化 (此译法在内地更常用。多谢读者OpenGPU来函提示) P.22: 战栗时空 -> 半条命 P.24: 战栗时空2 -> 半条命2 P.34: 1.6.8.2节第一行 提呈 -> 提交 (这术语在本书其他地方都写作提交。多谢读者OpenGPU来函提示) P.35: 第七行 提呈 -> 提交 (这术语在本书其他地方都写作提交。多谢读者OpenGPU来函提示) P.50: 战栗时空2 -> 半条命2 P.365: 第四段第二行: 细致程度 -> 层次细节 P.441: 10.4.3.2节第三行 细致程度 -> 层次细节 P.494: sinusiod -> sinusoid (多谢读者OpenGPU来函指正) P.511: 11.10.4节第一行 谈入 -> 淡入 (多谢读者Snow来函指正) P.541: 战栗时空2 -> 半条命2 P.627: 战栗时空2 -> 半条命2 P.654: 第二行 建康值 -> 血量 (原来是改正错别字，但译者发现应改作前后统一使用的“血量”。多谢读者Snow来函指正) P.692: 第二行 内部分式 -> 内部方式 (多谢读者Snow来函指正) P.696: 14.7.6节第四行 不设实际 -> 不切实际 (多谢读者Snow来函指正) 以上的错误已于第3次印册中修正。 其他意见 P.220: 正文第一段 m_root.m_pElement 和 P.218 第一段代码中的 m_pElem 不统一。原文有此问题，但因为它们是不同的struct，暂不列作错误。 (多谢读者Snow来函提示) P.331: 8.5.8节第二段中 “反覆”较常见的写法为“反复”，但前者也是正确的，暂不列作错误。 (多谢读者Snow来函提示) P.390: 10.1.3.3节静态光照第二段中“取而代之，我们会使用一张光照纹理贴到所有受光源影响范围内的物体上。这样做能令动态物体经过光源时得到正确的光照。” 后面的一句与前句好像难以一起理解。译者认为，作者应该是指，使用同一静态光源去为静态物件生成光照纹理，以及用于动态对象的光照，能使两者的效果维持一致性。译者会考虑对译文作出改善或加入译注解译。（多谢读者店残来函查询） P.689: 第五行 并行处理世代 -> 并行处理时代 是对era较准确的翻译。 (多谢读者Snow来函提示) 本篇文章为转载内容。原文链接：https://blog.csdn.net/mypongo/article/details/38388381。 该文由互联网用户投稿提供，文中观点代表作者本人意见，并不代表本站的立场。 作为信息平台，本站仅提供文章转载服务，并不拥有其所有权，也不对文章内容的真实性、准确性和合法性承担责任。 如发现本文存在侵权、违法、违规或事实不符的情况，请及时联系我们，我们将第一时间进行核实并删除相应内容。