C# 版爬虫，查看前后100 - 1000个case的最新状态

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C#版爬虫, 抓取https://egov.uscis.gov/casestatus/mycasestatus.do上case status各Last update时间，祝各位好运...

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
namespace CheckH1BStatus. Waral dи,
{
class Program
{
private static string USCISUrl = "https://egov.uscis.gov/casestatus/mycasestatus.do?appReceiptNum=WAC{0}";
private static int receiptNum = 1918552123; //Case number with out WAC. ----
private static Regex reg = new Regex(@"(?<=Your Current Status:\s+)[^<>]+");. check 1point3acres for more.
private static Regex regDate = new Regex("(?is)Your Current Status:\\s+([^<>]+).*?<div class=\"rows text-center\">.*?On ([^,]+)"); ..
private static int Count = 100; //默认取前后100位
[STAThread]
static void Main(string[] args)
{
int received = 0;
int approved = 0;
int denied = 0;
int rfe = 0;
int total = 0;
//前100位
for (int i = Count; i > 0; i--). 1point3acres.com
{
int number = receiptNum - i;
var url = string.Format(USCISUrl, number);-baidu 1point3acres
System.Net.WebClient client = new System.Net.WebClient();
total += 1;
var page = client.DownloadData(url);
string content = System.Text.Encoding.UTF8.GetString(page);
if (reg.IsMatch(content))
{ . Waral dи,
string status = reg.Match(content).Value.Trim();
string date = "UnKnown";
if (regDate.IsMatch(content))
{
date = string.Format("{0}, 2019", regDate.Match(content).Groups[2].Value);
}
string output = string.Format(" WAC{0} - {1} - {2}", number, status, date);
switch (status). .и
{
case CaseStatus.CWR:
received += 1;
break;
. .и
case CaseStatus.CWA:
case CaseStatus.CWA2:
Console.BackgroundColor = ConsoleColor.Green;
approved += 1;
break;
case CaseStatus.RFE:
case CaseStatus.RFE2:
Console.BackgroundColor = ConsoleColor.Yellow;
rfe += 1;
break;
case CaseStatus.CWD:
Console.BackgroundColor = ConsoleColor.Red;
denied += 1;
break;
default:
Console.BackgroundColor = ConsoleColor.Black;
break;
}
Console.WriteLine(output);
Console.BackgroundColor = ConsoleColor.Black;
}
else
{
Console.WriteLine(" WAC{0} ", number);
}
..
}
//后100位
for (int i = 0; i <= Count; i++). 1point3acres.com
{
int number = receiptNum + i;
var url = string.Format(USCISUrl, number);
System.Net.WebClient client = new System.Net.WebClient();
total += 1;
var page = client.DownloadData(url);. ----
string content = System.Text.Encoding.UTF8.GetString(page);
if (reg.IsMatch(content))
{
string status = reg.Match(content).Value.Trim();.
string date = "UnKnown";
if (regDate.IsMatch(content))
{.--
date = string.Format("{0}, 2019", regDate.Match(content).Groups[2].Value);
}. ----
string output = string.Format(" WAC{0} - {1} - {2}", number, status, date);
. From 1point 3acres bbs
if (number == receiptNum)
{
Console.WriteLine(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
}.google и
switch (status). 1point 3acres
{
case CaseStatus.CWR:. 1point 3 acres
received += 1;
break;
case CaseStatus.CWA:
case CaseStatus.CWA2:
Console.BackgroundColor = ConsoleColor.Green;
approved += 1;
break;
case CaseStatus.RFE:
case CaseStatus.RFE2:. 1point3acres
Console.BackgroundColor = ConsoleColor.Yellow;
rfe += 1;
break;. 1point3acres
case CaseStatus.CWD:
Console.BackgroundColor = ConsoleColor.Red;
denied += 1;
break;
default:. 1point3acres
Console.BackgroundColor = ConsoleColor.Black;. ----
break;
}
Console.WriteLine(output);
Console.BackgroundColor = ConsoleColor.Black;
if (number == receiptNum)
{
Console.WriteLine(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");.google и
}
}
else
{
Console.WriteLine(" WAC{0} ", number);
}. 1point3acres
}
Console.WriteLine(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");. 1point3acres
Console.WriteLine("Summary:");
Console.WriteLine(" Approved:" + approved);
Console.WriteLine(" Denied:" + denied);.--
Console.WriteLine(" RFE:" + rfe);
Console.WriteLine(" Recived:" + received);
Console.WriteLine(" Total:" + total);.--
Console.WriteLine(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>");
Console.ReadKey();
}
}
public class CaseStatus
{
public const string CWR = "Case Was Received";
public const string CWA = "Case Was Approved";
public const string CWA2 = "Case Was Approved And My Decision Was Emailed";
public const string RFE = "Request for Additional Evidence Was Sent";. 1point3acres.com
public const string RFE2 = "Response To USCIS' Request For Evidence Was Received";
public const string RFPP = "Request For Premium Processing Services Was Received";.google и
public const string CWT = "Case Was Transferred And A New Office Has Jurisdiction";
public const string CWD = "Decision Notice Mailed";
}
}. 1point 3 acres

复制代码

补充内容 (2019-7-26 14:49):
查看前后case的位数不限，但鉴于被封IP的风险，建议设置在5000内

q107770540

占楼。等了半天终于审核通过

[H1B] C# 版爬虫，查看前后100 - 1000个case的最新状态

注册一亩三分地论坛，查看更多干货！

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