最近一直急着在负责弄Asp.Net Web Api 与 Andriod 接口开发的对接工作！
刚听说要用Asp.Net Web Api去跟 Andriod 那端做接口对接工作，自己也是第一次接触Web Api，我就开始了边学习边开发，甚至连自己都没有来得急去理解和消化一些知识，就得去做项目了，感觉还是挺赶，挺忙的，很多东西都是在地铁上学习到的，很感谢 （ Artech 和 张善友 ）大神的博文 给予的帮助与启发 。
项目目录如下：
由于我这里所做的web api提供的是一整套项目接口，很多 api 接口都需要登录授权的，也有部分是匿名的。
==》 对于 对外开发 的 web api 接口，可能都具有 “匿名访问” 或者 是 "CORS授权机制"，或者是还要去限制 web api 调用的频率。
【CORS授权机制-知识】：http://www.cnblogs.com/artech/tag/ASP.NET Web API
【限制 Web Api 访问频率】：http://www.cnblogs.com/shanyou/p/3194802.html
对于哪些web api 需要 匿名开发，哪些需要登录授权才能访问，大家可以做一个通用的Attribute去做这个事情。
如下面代码，仅供参考：
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/// <summary>
/// 基本验证Attribtue，用以WebApi请求的权限处理
/// </summary>
public class BasicAuthenticationAttribute : ActionFilterAttribute
{
private static Uni2uni.Framework.Cache.ICache cache = CacheFactory.Redis(RedisDb.User); /// <summary>
/// 检查用户是否有该WebApi请求执行的权限
/// </summary>
/// <param name="actionContext"></param>
public override void OnActionExecuting(HttpActionContext actionContext)
{
if (actionContext.Request.Headers.Contains("Set-Cookie"))
{
var accessToken = actionContext.Request.Headers.GetValues("Set-Cookie");
Dictionary<string, string> item = new Dictionary<string, string>();
accessToken.FirstOrDefault().ToString().Split('&').Each(i =>
{
var itemLine = i.Split('=');
item.Add(itemLine[], itemLine[]);
});
//解密用户token值，看有没有登录
string tokenValue = System.Web.HttpUtility.UrlDecode(item["access_token"]);
if (ValidateToken(tokenValue))
{
base.OnActionExecuting(actionContext);
}
else
{
actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized);
actionContext.Response.Content = new StringContent("The request has no token or toke id expired,is invalid !",
Encoding.UTF8, "text/plain");
}
}
else
{
//检查web.config配置是否要求权限校验
bool isRquired = (WebConfigurationManager.AppSettings["WebApiAuthenticatedFlag"].ToString() == "true");
if (isRquired)
{
//如果请求Header不包含token，则判断是否是匿名调用
var attr = actionContext.ActionDescriptor.GetCustomAttributes<AllowAnonymousAttribute>().OfType<AllowAnonymousAttribute>();
bool isAnonymous = attr.Any(a => a is AllowAnonymousAttribute); //是匿名用户，则继续执行；非匿名用户，抛出“未授权访问”信息
if (isAnonymous)
{
base.OnActionExecuting(actionContext);
}
else
{
actionContext.Response = new HttpResponseMessage(HttpStatusCode.Unauthorized);
actionContext.Response.Content = new StringContent("The request is Unauthorized,is nto allow!",
Encoding.UTF8, "text/plain");
}
}
else
{
base.OnActionExecuting(actionContext);
}
}
} /// <summary>
/// 验证是否登录授权
/// </summary>
/// <param name="token"></param>
/// <returns></returns>
public bool ValidateToken(string token)
{
if (!string.IsNullOrEmpty(token))
{
var model = cache.Get<LoginMember>(token);
Logger.Error("2:请求中的。。。:model:" + model == null ? "不存在" : model.UserName);
return model != null ? true : false;
}
return false;
}
}
==》【 OData 】
考虑到手机项目的限制，在针对（查询分页，查询筛选，排序）方面，我用了Asp.Net Web Api OData，由于咋们的项目架构只支持.Net 4.0,最新的已经到 Asp.Net Web Api 2 OData了。
OData相关知识链接：
http://www.cnblogs.com/Kummy/p/3486097.html
http://www.cnblogs.com/shanyou/archive/2013/06/11/3131583.html
==》【 Web Api Post [FromBody] 支持简单的数据类型。】
在Web Api 开发中，我们会发现一个问题， Post 已经不支持简单的数据类型了。
如下面例子:
[AllowAnonymous]
[HttpPost]
public string Test([FromBody]string Name)
{
return null;
}
我们会发现，这个Post过来的类型怎么都是null
于是我找了很久，发现了解决这个问题的办法。
地址： http://weblog.west-wind.com/posts/2012/Sep/11/Passing-multiple-simple-POST-Values-to-ASPNET-Web-API
==》【 Web Api ， 简单的（ 通用上传 以及 通用分页 ）】
aaarticlea/png;base64,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" alt="" />
仅供参考代码，如下：
[BasicAuthentication]
public abstract class ApiControllerBase : ApiController
{
#region Common Pager
/// <summary>
/// 给结果集扩展一个分页
/// </summary>
/// <typeparam name="T">实体</typeparam>
/// <param name="_defaultSetting">页面设置</param>
/// <param name="options">筛选条件集合</param>
/// <param name="_list">待分页集合</param>
/// <returns></returns>
public PageResult<TEntity> GetPager<TEntity>(ODataQueryOptions<TEntity> options, IEnumerable<TEntity> _list, int PageSizeCount = ) where TEntity : class
{
ODataQuerySettings settings = new ODataQuerySettings
{
PageSize = PageSizeCount
};
IQueryable results = options.ApplyTo(_list.AsQueryable(), settings);
Request.GetInlineCount();
return new PageResult<TEntity>(
results as IEnumerable<TEntity>,
Request.GetNextPageLink(),
Request.GetInlineCount());
}
#endregion #region Common Upload
/// <summary>
/// 通用上传图片-操作
/// </summary>
/// <typeparam name="T">上传实体</typeparam>
/// <param name="dirPath">上传路劲</param>
/// <param name="fileNameAction">文件名自定义扩展</param>
/// <param name="Entity">实体名字</param>
/// <returns>图片上传是否成功</returns>
[NonAction]
public Hashtable CommonUpload<T>(string dirPath, Action<string> fileNameAction, out T Entity) where T : class
{
var queryp = Request.GetQueryNameValuePairs(); //获得查询字符串的键值集合
Entity = GetUploadEntity<T>(queryp); //实体赋值操作 // 检查是否是 multipart/form-data
if (!Request.Content.IsMimeMultipartContent("form-data"))
throw new HttpResponseException(HttpStatusCode.UnsupportedMediaType);
//文件保存目录路径
string SaveTempPath = dirPath;
String dirTempPath = HttpContext.Current.Server.MapPath(SaveTempPath);
Logger.Error("文件路径:" + dirTempPath);
// 设置上传目录
var provider = new MultipartFormDataStreamProvider(dirTempPath); //Logger.Error("queryp参数:" + param);
var task = Request.Content.ReadAsMultipartAsync(provider).
ContinueWith<Hashtable>(o =>
{
Hashtable hash = new Hashtable();
hash["error"] = ;
hash["errmsg"] = "上传出错";
var file = provider.FileData[];//provider.FormData
string orfilename = file.Headers.ContentDisposition.FileName.TrimStart('"').TrimEnd('"');
FileInfo fileinfo = new FileInfo(file.LocalFileName); Logger.Error("最大文件大小:" + fileinfo.Length);
Logger.Error("最大格式:" + orfilename);
//最大文件大小
int maxSize = ;
if (fileinfo.Length <= )
{
hash["error"] = ;
hash["errmsg"] = "请选择上传文件。";
}
else if (fileinfo.Length > maxSize)
{
hash["error"] = ;
hash["errmsg"] = "上传文件大小超过限制。";
}
else
{
string fileExt = orfilename.Substring(orfilename.LastIndexOf('.'));
//定义允许上传的文件扩展名
String fileTypes = "gif,jpg,jpeg,png,bmp";
if (String.IsNullOrEmpty(fileExt) || Array.IndexOf(fileTypes.Split(','), fileExt.Substring().ToLower()) == -)
{
hash["error"] = ;
hash["errmsg"] = "上传文件扩展名是不允许的扩展名。";
}
else
{
//String ymd = DateTime.Now.ToString("yyyyMMdd", System.Globalization.DateTimeFormatInfo.InvariantInfo);
//String newFileName = DateTime.Now.ToString("yyyyMMddHHmmss_ffff", System.Globalization.DateTimeFormatInfo.InvariantInfo);
//String finalFileName = newFileName + fileExt;
string excute_FileName = string.Empty;
fileNameAction = (i) => { excute_FileName = i; };
fileinfo.CopyTo(Path.Combine(dirTempPath, excute_FileName), true);
fileinfo.Delete();
hash["error"] = ;
hash["errmsg"] = "上传成功";
hash["filePathUrl"] = excute_FileName;
}
}
return hash;
});
return null;
} /// <summary>
/// 反射动态的实体赋值-操作
/// </summary>
/// <typeparam name="Entity"></typeparam>
/// <param name="queryp"></param>
/// <returns></returns>
[NonAction]
public Entity GetUploadEntity<Entity>(IEnumerable<KeyValuePair<string, string>> queryp) where Entity : class
{
var entity = typeof(Entity);
Object model = entity.Assembly.CreateInstance(entity.FullName, true);
var props = entity.GetProperties(BindingFlags.Instance | BindingFlags.Public);
foreach (PropertyInfo propertyInfo in typeof(Entity).GetProperties())
{
queryp.Each(i =>
{
if (i.Key.Equals(propertyInfo.Name.ToString()))
{
propertyInfo.SetValue(model, i.Value, null);
}
});
}
return (Entity)model;
}
#endregion
}
希望，能对各位小伙伴不吝赐教。
祝各位小伙伴，元旦节快乐！