如何解决从URL读取数据时发生的服务器错误（500）。如何获取哪种类型的服务器错误？

问题描述：

大家好，

我想以xml格式从URL读取数据。

那个是代码，

Hi everyone,

I want to read data from URL in xml format.

That is the code,

WebProxy wb = new WebProxy(WebProxy.GetDefaultProxy().Address);

            WebClient wc = new WebClient();
            wc.Proxy = wb;
            string website = wc.DownloadString("http://www.mgm.gov.tr/tahmin/il-ve-ilceler.aspx?m=ISTANBUL/");

            XmlDocument xmldoc = new XmlDocument();
            xmldoc.LoadXml(website);

代码xmldoc.LoadXml（网站） ;给出上面的错误

System.Xml.dll中发生未处理的System.Net.WebException类型异常

附加信息：远程服务器返回了一个错误：（500）内部服务器错误。

我用Google搜索并了解到有可能出现这种情况的原因服务器错误。我找到了Fiddler来找出我遇到的服务器错误。但是，当我运行代码问题时，结果= 500并且没有给出日志。

因此，我想了解System.Xml.dll。

这就是问题，我的目的是从URL读取数据

感谢您的建议

The code xmldoc.LoadXml(website); gives the error above

An unhandled exception of type 'System.Net.WebException' occurred in System.Xml.dll
Additional information: The remote server returned an error: (500) Internal Server Error.

I googled and learned that there can be severel reasons for that server error. I found Fiddler to find out which server error i faced. But when i run the code the problem just says, Result = 500 and gives no log.

Therefore, I chechked the System.Xml.dll.

That is the issue, i just aimed to read data from URL
Thanks for advice

答

尝试像bellow

这是一个样本。

...

public static String excutePost（String targetURL，String urlParameters）

{

URL url;

HttpURLConnection connection =空值;

尝试{

//创建连接

url =新网址（targetURL）;

connection =（HttpURLConnection ）url.openConnection（）;

connection.setRequestMethod（POST）;

connection.setRequestProperty（Content-Type，

application / x-www-form-urlencoded）;

connection.setRequestProperty（Content-Length，+

Integer.toString（urlParameters.getBytes（）。length））;

connection.setRequestProperty（Content-Language，en-US）;

connection.setUseCaches（false）;

connection.setDoInput（true）;

connection.setDoOutput（真的）;

//发送请求

DataOutputStream wr = new DataOutputStream（

connection.getOutputStream（））;

wr.writeBytes（urlParameters）;

wr.flush（）;

wr.close（）;

//获取响应

InputStream is = connection.getInputStream（）;

BufferedReader rd = new BufferedReader（new InputStreamReader（is）））;

字符串行;

StringBuffer response = new StringBuffer（）;

while（（line = rd.readLine（））！= null）{

response.append（line）;

response.append （'\ r'）;

}

rd.close（）;

返回response.toString（）;

} catch（例外e）{

e.printStackTrace（）;

返回null;

}终于{

if（connection！= null）{

connection.disconnect（）;

}

}

}

...

try like bellow

Here is one sample.

...
public static String excutePost(String targetURL, String urlParameters)
{
URL url;
HttpURLConnection connection = null;
try {
//Create connection
url = new URL(targetURL);
connection = (HttpURLConnection)url.openConnection();
connection.setRequestMethod("POST");
connection.setRequestProperty("Content-Type",
"application/x-www-form-urlencoded");

connection.setRequestProperty("Content-Length", "" +
Integer.toString(urlParameters.getBytes().length));
connection.setRequestProperty("Content-Language", "en-US");

connection.setUseCaches (false);
connection.setDoInput(true);
connection.setDoOutput(true);

//Send request
DataOutputStream wr = new DataOutputStream (
connection.getOutputStream ());
wr.writeBytes (urlParameters);
wr.flush ();
wr.close ();

//Get Response
InputStream is = connection.getInputStream();
BufferedReader rd = new BufferedReader(new InputStreamReader(is));
String line;
StringBuffer response = new StringBuffer();
while((line = rd.readLine()) != null) {
response.append(line);
response.append('\r');
}
rd.close();
return response.toString();

} catch (Exception e) {

e.printStackTrace();
return null;

} finally {

if(connection != null) {
connection.disconnect();
}
}
}
...

如何解决从URL读取数据时发生的服务器错误（500）。如何获取哪种类型的服务器错误？

相关推荐