前言
autowrapper是一个简单可自定义全局异常处理程序和asp.net core api响应的包装。他使用asp.net core middleware拦截传入的http请求,并将最后的结果使用统一的格式来自动包装起来.目的主要是让我们更多的关注业务特定的代码要求,并让包装器自动处理http响应。这可以在构建api时加快开发时间,同时为http响应试试我们统一的标准。
安装
autowrapper.core从nuget或通过cli下载并安装
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pm> install-package autowrapper.core
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在startup.cs configure方法中注册以下内容,但是切记要放在userouting前
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app.useapiresponseandexceptionwrapper();
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启动属性映射
默认情况下autowrapper将在成功请求成功时输出以下格式:
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{
"message" : "request successful." ,
"iserror" : false ,
"result" : [
{
"id" : 7002,
"firstname" : "vianne" ,
"lastname" : "durano" ,
"dateofbirth" : "2018-11-01t00:00:00"
}
]
}
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如果说不喜欢默认属性命名方式,那么我们可以通过autowrapperpropertymap属性进行映射为我们需要指定的任何名称。例如我么可以将result属性的名称更改为data。如下所示
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public class mapresponseobject
{
[autowrapperpropertymap(prop.result)]
public object data { get ; set ; }
}
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然后将mapresponseobject类传递给autpwrapper middleware
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app.useapiresponseandexceptionwrapper<mapresponseobject>();
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通过映射重新请求后,现在影响格式如下所示
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{
"message" : "request successful." ,
"iserror" : false ,
"data" : {
"id" : 7002,
"firstname" : "vianne" ,
"lastname" : "durano" ,
"dateofbirth" : "2018-11-01t00:00:00"
}
}
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可以从中看出result属性已经更换为data属性了
默认情况下autowrapper发生异常时将吐出以下响应格式
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{
"iserror" : true ,
"responseexception" : {
"exceptionmessage" : "unhandled exception occurred. unable to process the request."
}
}
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而且如果在autowrapperoptions中设置了isdebug,则将产生带有堆栈跟踪信息的类似信息
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{
"iserror" : true ,
"responseexception" : {
"exceptionmessage" : " input string was not in a correct format." ,
"details" : " at system.number.throwoverfloworformatexception(parsingstatus status, typecode type)\r\n at system.number.parseint32(readonlyspan`1 value, numberstyles styles, numberformatinfo info)\r\n …"
}
}
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如果想将某些apierror属性名称更改为其他名称,只需要在以下代码中添加以下映射mapresponseobject
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public class mapresponseobject
{
[autowrapperpropertymap(prop.responseexception)]
public object error { get ; set ; }
[autowrapperpropertymap(prop.responseexception_exceptionmessage)]
public string message { get ; set ; }
[autowrapperpropertymap(prop.responseexception_details)]
public string stacktrace { get ; set ; }
}
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通过如下代码来模拟错误
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int num = convert.toint32( "10s" );
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现在映射后的输出如下所示
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{
"iserror" : true ,
"error" : {
"message" : " input string was not in a correct format." ,
"stacktrace" : " at system.number.throwoverfloworformatexception(parsingstatus status, typecode type)\r\n at system.number.parseint32(readonlyspan`1 value, numberstyles styles, numberformatinfo info)\r\n …"
}
}
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请注意apierror现在根据mapresponseobject类中定义的属性更改了模型的默认属性。
我们可以*的选择映射任何属性,下面是映射属性相对应的列表
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[autowrapperpropertymap(prop.version)]
[autowrapperpropertymap(prop.statuscode)]
[autowrapperpropertymap(prop.message)]
[autowrapperpropertymap(prop.iserror)]
[autowrapperpropertymap(prop.result)]
[autowrapperpropertymap(prop.responseexception)]
[autowrapperpropertymap(prop.responseexception_exceptionmessage)]
[autowrapperpropertymap(prop.responseexception_details)]
[autowrapperpropertymap(prop.responseexception_referenceerrorcode)]
[autowrapperpropertymap(prop.responseexception_referencedocumentlink)]
[autowrapperpropertymap(prop.responseexception_validationerrors)]
[autowrapperpropertymap(prop.responseexception_validationerrors_field)]
[autowrapperpropertymap(prop.responseexception_validationerrors_message)]
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自定义错误架构
autowrapper还提供了一个apiexception可用于定义自己的异常的对象,如果想抛出自己的异常消息,则可以简单地执行以下操作
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throw new apiexception( "error blah" , 400, "511" , "http://blah.com/error/511" );
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默认输出格式如下所示
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{
"iserror" : true ,
"responseexception" : {
"exceptionmessage" : "error blah" ,
"referenceerrorcode" : "511" ,
"referencedocumentlink" : "http://blah.com/error/511"
}
}
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当然我们可以自定义错误格式
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public class mapresponseobject
{
[autowrapperpropertymap(prop.responseexception)]
public object error { get ; set ; }
}
public class error
{
public string message { get ; set ; }
public string code { get ; set ; }
public innererror innererror { get ; set ; }
public error( string message, string code, innererror inner)
{
this .message = message;
this .code = code;
this .innererror = inner;
}
}
public class innererror
{
public string requestid { get ; set ; }
public string date { get ; set ; }
public innererror( string reqid, string reqdate)
{
this .requestid = reqid;
this .date = reqdate;
}
}
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然后我们可以通过如下代码进行引发我们错误
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throw new apiexception(
new error( "an error blah." , "invalidrange" ,
new innererror( "12345678" , datetime.now.toshortdatestring())
));
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输出格式如下所示
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{
"iserror" : true ,
"error" : {
"message" : "an error blah." ,
"code" : "invalidrange" ,
"innererror" : {
"requestid" : "12345678" ,
"date" : "10/16/2019"
}
}
}
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使用自定义api响应格式
如果映射满足不了我们的需求。并且我们需要向api响应模型中添加其他属性,那么我们现在可以自定义自己的格式类,通过设置usecustomschema为true来实现,代码如下所示
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app.useapiresponseandexceptionwrapper( new autowrapperoptions { usecustomschema = true });
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现在假设我们想在主api中响应中包含一个属性sentdate和pagination对象,我们可能希望将api响应模型定义为以下格式
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public class mycustomapiresponse
{
public int code { get ; set ; }
public string message { get ; set ; }
public object payload { get ; set ; }
public datetime sentdate { get ; set ; }
public pagination pagination { get ; set ; }
public mycustomapiresponse(datetime sentdate, object payload = null , string message = "" , int statuscode = 200, pagination pagination = null )
{
this .code = statuscode;
this .message = message == string .empty ? "success" : message;
this .payload = payload;
this .sentdate = sentdate;
this .pagination = pagination;
}
public mycustomapiresponse(datetime sentdate, object payload = null , pagination pagination = null )
{
this .code = 200;
this .message = "success" ;
this .payload = payload;
this .sentdate = sentdate;
this .pagination = pagination;
}
public mycustomapiresponse( object payload)
{
this .code = 200;
this .payload = payload;
}
}
public class pagination
{
public int totalitemscount { get ; set ; }
public int pagesize { get ; set ; }
public int currentpage { get ; set ; }
public int totalpages { get ; set ; }
}
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通过如下代码片段进行测试结果
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public async task<mycustomapiresponse> get ()
{
var data = await _personmanager.getallasync();
return new mycustomapiresponse(datetime.utcnow, data,
new pagination
{
currentpage = 1,
pagesize = 10,
totalitemscount = 200,
totalpages = 20
});
}
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运行后会得到如下影响格式
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{
"code" : 200,
"message" : "success" ,
"payload" : [
{
"id" : 1,
"firstname" : "vianne" ,
"lastname" : "durano" ,
"dateofbirth" : "2018-11-01t00:00:00"
},
{
"id" : 2,
"firstname" : "vynn" ,
"lastname" : "durano" ,
"dateofbirth" : "2018-11-01t00:00:00"
},
{
"id" : 3,
"firstname" : "mitch" ,
"lastname" : "durano" ,
"dateofbirth" : "2018-11-01t00:00:00"
}
],
"sentdate" : "2019-10-17t02:26:32.5242353z" ,
"pagination" : {
"totalitemscount" : 200,
"pagesize" : 10,
"currentpage" : 1,
"totalpages" : 20
}
}
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但是从这里要注意一旦我们对api响应进行自定义,那么就代表我们完全控制了要格式化数据的方式,同时丢失了默认api响应的某些选项配置。但是我们仍然可以利用apiexception()方法引发用户定义的错误消息
如下所示
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[route( "{id:long}" )]
[httpput]
public async task<mycustomapiresponse> put( long id, [frombody] persondto dto)
{
if (modelstate.isvalid)
{
try
{
var person = _mapper.map<person>(dto);
person.id = id;
if (await _personmanager.updateasync(person))
return new mycustomapiresponse(datetime.utcnow, true , "update successful." );
else
throw new apiexception($ "record with id: {id} does not exist." , 400);
}
catch (exception ex)
{
_logger.log(loglevel.error, ex, "error when trying to update with id:{@id}" , id);
throw ;
}
}
else
throw new apiexception(modelstate.allerrors());
}
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现在当进行模型验证时,可以获得默认响应格式
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{
"iserror" : true ,
"responseexception" : {
"exceptionmessage" : "request responded with validation error(s). please correct the specified validation errors and try again." ,
"validationerrors" : [
{
"field" : "firstname" ,
"message" : "'first name' must not be empty."
}
]
}
}
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reference
https://github.com/proudmonkey/autowrapper
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原文链接:https://www.cnblogs.com/yyfh/p/12602087.html