public void ConfigureServices(IServiceCollection services)
{
services.AddCors(options =>
{
options.AddPolicy(name: "Cors(PolicyName",
builder =>
{
builder.WithOrigins("https://web1.yourdomain.com",
"https://web2.yourdomain.com")
.AllowCredentials();
});
});
services.AddControllers()
.AddNewtonsoftJson(opt =>
opt.SerializerSettings.ContractResolver = new CamelCasePropertyNamesContractResolver());
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
app.UseExceptionMiddleware();
app.UseHttpsRedirection();
app.UseHttpsRedirection();
app.UseRouting();
app.UseCors(MyAllowSpecificOrigins);
app.UseAuthorization();
$.ajax({
url: apiRoot + "apiurl",
type: 'GET',
dataType: 'json', // 預期從server接收的資料型態
success: function (res) {
console.log("success: ");
console.log(res);
},
xhrFields: {
withCredentials: true
},
error: function (XMLHttpRequest, textStatus, errorThrown) {
alert("發生錯誤");
}
});
public static DataTable DTFromSQL(string Sql, string DBC = null, Int32 timeout = 0)
{
SqlDataAdapter DA = new SqlDataAdapter(Sql, GetDBC(DBC));
DataTable DT = new DataTable();
try
{
DA = new SqlDataAdapter(Sql, DBC);
if (timeout > 0)
{
DA.SelectCommand.CommandTimeout = timeout;
}
DA.Fill(DT);
}
catch (Exception ex)
{
throw new Exception(ex.ToString());
}
finally
{
DA.Dispose();
}
return DT;
}
public static DataTable DTFromSQL(string Sql, string DBC = null, Int32 timeout = 30)
{
using (var DA = new SqlDataAdapter(Sql, GetDBC(DBC)))
{
//不可為 null
DataTable DT = new DataTable();
DA.SelectCommand.CommandTimeout = timeout;
DA.Fill(DT);
return DT;
}
}
Response.Write(Convert.ToInt32("94"));
Response.Write("<br/>");
Response.Write(Convert.ToInt32(94.5)); //會四捨六入五成雙
Response.Write("<br/>");
Response.Write((94.5).ToString("N0")); //會四捨五入
Response.Write("<br/>");
Response.Write((95.5).ToString("N0")); //會四捨五入
Response.Write("<br/>");
Response.Write(Convert.ToInt32(null)); //會 return 0
Response.Write("<br/>");
Response.Write(Convert.ToInt32("94.55")); //會有 exception 要先轉成 double 之類的數值
Response.Write("<br/>");
<system.web>
<httpRuntime requestValidationMode="2.0" maxRequestLength="1024000"/>
</system.web>
public string UploadFilesToRemoteUrl(string url, string[] files, NameValueCollection formFields = null)
{
string boundary = "----------------------------" + DateTime.Now.Ticks.ToString("x");
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.ContentType = "multipart/form-data; boundary=" +
boundary;
request.Method = "POST";
request.KeepAlive = true;
Stream memStream = new System.IO.MemoryStream();
var boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" +
boundary + "\r\n");
var endBoundaryBytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" +
boundary + "--");
string formdataTemplate = "\r\n--" + boundary +
"\r\nContent-Disposition: form-data; name=\"{0}\";\r\n\r\n{1}";
if (formFields != null)
{
foreach (string key in formFields.Keys)
{
string formitem = string.Format(formdataTemplate, key, formFields[key]);
byte[] formitembytes = System.Text.Encoding.UTF8.GetBytes(formitem);
memStream.Write(formitembytes, 0, formitembytes.Length);
}
}
string headerTemplate =
"Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\n" +
"Content-Type: application/octet-stream\r\n\r\n";
for (int i = 0; i < files.Length; i++)
{
memStream.Write(boundarybytes, 0, boundarybytes.Length);
var header = string.Format(headerTemplate, "uplTheFile", files[i]);
var headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
memStream.Write(headerbytes, 0, headerbytes.Length);
using (var fileStream = new FileStream(files[i], FileMode.Open, FileAccess.Read))
{
var buffer = new byte[1024];
var bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
Response.Write("bytesRead: " + bytesRead.ToString() + "<br>");
memStream.Write(buffer, 0, bytesRead);
}
}
}
memStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
request.ContentLength = memStream.Length;
using (Stream requestStream = request.GetRequestStream())
{
memStream.Position = 0;
byte[] tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
requestStream.Write(tempBuffer, 0, tempBuffer.Length);
}
try
{
using (var response = request.GetResponse())
{
Stream stream2 = response.GetResponseStream();
StreamReader reader2 = new StreamReader(stream2);
return reader2.ReadToEnd();
}
}
catch (Exception ex)
{
return (ex.ToString());
throw;
}
}
<Item time="2016-01-11T05:39:01" page="/fr/iconic-bright-cushion-spf-50-pa-nude-perfection-compact-foundation/p/5490/c/30"
url="http://www.shopunt.com/fr/iconic-bright-cushion-spf-50-pa-nude-perfection-compact-foundation/p/5490/c/30?utm_source=edm&utm_medium=email&utm_content=20160107_cushion_4&utm_campaign=makeup&OutAD_Id=5825" username="Not Member" browserName="Chrome" browserVersion="34.0" userAgent="Mozilla/5.0 (Linux; Android 5.1.1; SAMSUNG SM-N915FY Build/LMY47X) AppleWebKit/537.36 (KHTML, like Gecko) SamsungBrowser/2.1 Chrome/34.0.1847.76 Mobile Safari/537.36" RemoteIP="37.160.206.7" Ref="No Ref" RequestType="GET" Ver="3">
<ErrMsg>
</ErrMsg>
<ErrStack> 於 System.Web.CachedPathData.ValidatePath(String physicalPath)
於 System.Web.HttpApplication.PipelineStepManager.ValidateHelper(HttpContext context)</ErrStack>
<Post>
</Post>
<Cookie>
</Cookie>
</Item>
應用程式: w3wp.exe
Framework 版本: v4.0.30319
描述: 處理序已終止,因為有未處理的例外狀況。
例外狀況資訊: System.Exception
堆疊:
於 UW.SQL.DTFromSQL(System.String, System.String)
於 UW.SQL.DTFromSQL(System.String, System.Data.SqlClient.SqlConnection ByRef, Boolean)
於 SHOPUNT.DB.Product.RebuildNotStopProducDT()
於 System.Threading.ExecutionContext.runTryCode(System.Object)
於 System.Runtime.CompilerServices.RuntimeHelpers.ExecuteCodeWithGuaranteedCleanup(TryCode, CleanupCode, System.Object)
於 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object, Boolean)
於 System.Threading.ExecutionContext.Run(System.Threading.ExecutionContext, System.Threading.ContextCallback, System.Object)
於 System.Threading.ThreadHelper.ThreadStart()
---------------------------------------------------------------------------------------------------------------------------------------
失敗的應用程式名稱: w3wp.exe,版本: 7.5.7601.17514,時間戳記: 0x4ce7afa2
失敗的模組名稱: KERNELBASE.dll,版本: 6.1.7601.18229,時間戳記: 0x51fb1677
例外狀況碼: 0xe0434352
錯誤位移: 0x000000000000940d
失敗的處理程序識別碼: 0x57c4
失敗的應用程式開始時間: 0x01d012faf33398f8
失敗的應用程式路徑: c:\windows\system32\inetsrv\w3wp.exe
失敗的模組路徑: C:\Windows\system32\KERNELBASE.dll
報告識別碼: 90ad2f4d-7f89-11e4-8ad2-e41f13b7d81e
昨晚突然出現大量的Exception,發現是某個IP攻擊網站,所以就直接使用IIS擋IP方式阻擋該IP的攻擊,但是設定之後,發現Exception還是一直出來。但是束手無策....直到一個多小時後才停止攻擊。
事後翻出IIS Log看結果
發現IIS擋IP有發揮作用(status:403) 但是會有漏網之魚(status:302-其實status是500)
檢查 "23:10:46" 一秒內受到 36 次攻擊 但是漏掉了 8 個 -> 失敗率約兩成
結論:
1. 對於阻斷攻擊,可能還需要程式上做處理,例如 begin_request 時檢查
2. Log Parser 真是看 log 最佳工具....