如何发送网络请求以检查链接是否断开 [英] how to send web request to check the link whether the link is broken or not
问题描述
我有一个文本框(多行)，我想将Web请求发送到所有链接，以检查该链接是否正常(如果不正常，则显示错误消息)
i am having text box(multi line) from that i want to send the web request to all links to check whether the link is working or not if not working then message of error
string strLink = TextBox1.Text;
WebResponse objResponse;
WebRequest objRequest = System.Net.HttpWebRequest.Create(strLink);
objResponse = objRequest.GetResponse();
using (StreamReader sr = new StreamReader(objResponse.GetResponseStream()))
{
strLink = sr.ReadToEnd();
sr.Close();
}
strLink = strLink.Replace("<form id='form1' method='post' action=''>", "");
strLink = strLink.Replace("</form>", "");
//strResult = strResult.Replace("<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" /><html xmlns="http://www.w3.org/1999/xhtml">");
div.InnerHtml = TextBox1.Text;
推荐答案
除非我误解了您，否则您可以执行以下操作:
Unless I misunderstood you, you can do something like this:
var links = textBox1.Text.Split(new string[] { "\n", "\r" }, StringSplitOptions.RemoveEmptyEntries);
foreach (var link in links) {
if (!IsLinkWorking(link)) {
//Here you can show the error. You don't specify how you want to show it.
textBox2.Text += string.Format("Link {0} not working\n", link);
}
}
bool IsLinkWorking(string url) {
HttpWebRequest request = (HttpWebRequest) HttpWebRequest.Create(url);
//You can set some parameters in the "request" object...
request.AllowAutoRedirect = true;
try {
HttpWebResponse response = (HttpWebResponse) request.GetResponse();
return true;
} catch { //TODO: Check for the right exception here
return false;
}
}
假设您在textBox1中有以下内容:
Assuming you had in textBox1 something like this:
http://www.stackoverflow.com/
http://www.invalid-page.com/
http://www.invalid.again.com/120938213
http://www.stackoverflow.com/
http://www.invalid-page.com/
http://www.invalid.again.com/120938213
您最终将在textBox2中获得以下文本:
You will end up with the following text in textBox2:
链接 http://www.invalid-page.com/不起作用
链接 http://www.invalid.again.com/120938213 不起作用
Link http://www.invalid-page.com/ not working
Link http://www.invalid.again.com/120938213 not working
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