如何在黑莓中通过 www.ipaddresslocation.org 获取 IP 地址

Question

我是黑莓编程的新手。 我正在尝试通过 www.ipaddressslocation.org 获取 IP 地址、县、市、州/省

我的来源：

String url = "http://www.ipaddresslocation.org/my-ip-address.php";
    // HTTP connection
    HttpConnection httpConnection = null;
    // Stream connection
    StreamConnection streamConnection = (StreamConnection) Connector
            .open(url);
    httpConnection = (HttpConnection) streamConnection;
    int code = httpConnection.getResponseCode();
    String strContent = "";
    // Check response code
    if (code == HttpConnection.HTTP_OK) {
        InputStream is = httpConnection.openInputStream();
        int length = (int) httpConnection.getLength();
        // Content is empty
        if (length != -1) {
            byte incomingData[] = new byte[length];
            is.read(incomingData);
            strContent = new String(incomingData);
            // Write content
        } else {
            ByteArrayOutputStream bytestream = new ByteArrayOutputStream();
            int ch;
            while ((ch = is.read()) != -1) {
                bytestream.write(ch);
            }
            strContent = new String(bytestream.toByteArray());
            bytestream.close();
        }
    }

当完成这个方法时，我得到了 strContent return 。 详细内容：

\ndocument.write('<table><tr><td>Hello, visitor from: <strong> Takatsuki, Japan</strong>');document.write('<img src=\'http://www.ipaddresslocation.org/flags/jp.png\'></td></tr>');document.write('<tr><td>Your Country Code: <b>JP</b></td></tr>');document.write('<tr><td>Your IP State: <b>Osaka</b></td></tr>');document.write('<tr><td>Your IP Address: <b>202.213.220.66</b></td></tr>');document.write('<tr><td>Your Hostname: <b>ns.isb.co.jp</b></td></tr>');document.write('<tr><td>Your ISP: <b>So-net Entertainment Corporation</b></td></tr>');document.write('<tr><td>Your Organization: <b>ISB CORP.</b></td></tr></table>');

如何从以上内容中获取IP、国家、州、城市？

谢谢和最好的问候！

Answer 1

由于没有标准格式，即 JSON 或 XML，您必须自己解析响应。要编写您的 scraper，只需仔细检查响应格式并设计您的算法。

例如，如果我们用“;”分割响应，则响应如下所示..

document.write('<table><tr><td>Hello, visitor from: <strong> Dhaka, Bangladesh</strong>')
document.write('<img src=\'http://www.ipaddresslocation.org/flags/bd.png\'></td></tr>')
document.write('<tr><td>Your Country Code: <b>BD</b></td></tr>')
document.write('<tr><td>Your IP State: <b>Dhaka</b></td></tr>')
document.write('<tr><td>Your IP Address: <b>116.212.105.42</b></td></tr>')
document.write('<tr><td>Your Hostname: <b>ws9-tetrasoft-dm-ac1-p16.telnet.com.bd</b></td></tr>')
document.write('<tr><td>Your ISP: <b>Telnet Communication Limited</b></td></tr>')
document.write('<tr><td>Your Organization: <b>Telnet Communication Limited</b></td></tr></table>')

然后你可以从每一行中删除“document.write('”和“')”..

那么响应就会变成

<table><tr><td>Hello, visitor from: <strong> Dhaka, Bangladesh</strong>
<img src=\'http://www.ipaddresslocation.org/flags/bd.png\'></td></tr>
<tr><td>Your Country Code: <b>BD</b></td></tr>
<tr><td>Your IP State: <b>Dhaka</b></td></tr>
<tr><td>Your IP Address: <b>116.212.105.42</b></td></tr>
<tr><td>Your Hostname: <b>ws9-tetrasoft-dm-ac1-p16.telnet.com.bd</b></td></tr>
<tr><td>Your ISP: <b>Telnet Communication Limited</b></td></tr>
<tr><td>Your Organization: <b>Telnet Communication Limited</b></td></tr></table>

现在您可以使用任何 HTML 解析器，也可以自己解析其余部分...

解决问题...

例如获取IP地址，需要解析第5行..

删除从索引 0 到索引 <b> + 3 的所有字符......这将从该行删除“<tr><td>Your IP Address: <b>”部分...... 然后从</b> 的索引中删除字符到最后...这将从该行中删除“”..您将得到“116.212.105.42”作为剩余...

Answer 2

我认为无法解析它，但我们可以使用逻辑从该字符串中获取数据 但格式应该永远相同

import net.rim.device.api.ui.UiApplication;
import net.rim.device.api.ui.component.LabelField;
import net.rim.device.api.ui.container.MainScreen;

public class StartUp extends UiApplication{
    public static void main(String[] args) {
        StartUp start=new StartUp();
        start.enterEventDispatcher();
    }
    public StartUp() {
        pushScreen(new simple());
    }
}
class simple extends MainScreen
{
    LabelField labl;
    public simple() {
        String str="\ndocument.write('<table><tr><td>Hello, visitor from: <strong> Takatsuki, Japan</strong>');document.write('<img src=\'http://www.ipaddresslocation.org/flags/jp.png\'></td></tr>');document.write('<tr><td>Your Country Code: <b>JP</b></td></tr>');document.write('<tr><td>Your IP State: <b>Osaka</b></td></tr>');document.write('<tr><td>Your IP Address: <b>202.213.220.66</b></td></tr>');document.write('<tr><td>Your Hostname: <b>ns.isb.co.jp</b></td></tr>');document.write('<tr><td>Your ISP: <b>So-net Entertainment Corporation</b></td></tr>');document.write('<tr><td>Your Organization: <b>ISB CORP.</b></td></tr></table>');";
        str=str.substring(str.indexOf("document.write"));
        String arr[]=split(str, "document.write('");
        String s="";
        int len=arr.length;

        for(int i=0;i<len;i++){
                if(i==0){

                    s=arr[i];
                    if(s.indexOf("<strong>")!=-1 && s.indexOf("</strong>")!=-1 ){
                        int sx=s.indexOf("<strong>")+8;
                        int dx=s.indexOf("</strong>");
                        System.out.println(s.substring(sx,dx));
                        labl=new LabelField(s.substring(sx,dx));
                        add(labl);
                    }



                }else if(i==1){
                    s=arr[i];
                    if(s.indexOf("img src='")!=-1 && s.indexOf("'>")!=-1 ){
                    int sx=s.indexOf("'")+1;
                    int dx=s.indexOf("'>");
                    System.out.println(s.substring(sx,dx));
                    labl=new LabelField(s.substring(sx,dx));
                    add(labl);
                    }
                }
            else{
                if(arr[i].indexOf("<b>")!=-1 && arr[i].indexOf("</b>")!=-1 ){
                int sx=arr[i].indexOf("<b>")+3;
                int dx=arr[i].indexOf("</b>");
                System.out.println(arr[i].substring(sx,dx));
                labl=new LabelField(arr[i].substring(sx,dx));
                add(labl);

                }
            }
        }
    }
     public static String[] split(String strString, String strDelimiter)
        {
            int iOccurrences = 0;
            int iIndexOfInnerString = 0;
            int iIndexOfDelimiter = 0;
            int iCounter = 0;

            // Check for null input strings.
            if (strString == null)
            {
                throw new NullPointerException("Input string cannot be null.");
            }
            // Check for null or empty delimiter
            // strings.
            if (strDelimiter.length() <= 0 || strDelimiter == null)
            {
                throw new NullPointerException("Delimeter cannot be null or empty.");
            }

            // If strString begins with delimiter
            // then remove it in
            // order
            // to comply with the desired format.

            if (strString.startsWith(strDelimiter))
            {
                strString = strString.substring(strDelimiter.length());
            }

            // If strString does not end with the
            // delimiter then add it
            // to the string in order to comply with
            // the desired format.
            if (!strString.endsWith(strDelimiter))
            {
                strString += strDelimiter;
            }

            // Count occurrences of the delimiter in
            // the string.
            // Occurrences should be the same amount
            // of inner strings.
            while((iIndexOfDelimiter= strString.indexOf(strDelimiter,iIndexOfInnerString))!=-1)
            {
                iOccurrences += 1;
                iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();
            }

            // Declare the array with the correct
            // size.
            String[] strArray = new String[iOccurrences];

            // Reset the indices.
            iIndexOfInnerString = 0;
            iIndexOfDelimiter = 0;

            // Walk across the string again and this
            // time add the
            // strings to the array.
            while((iIndexOfDelimiter= strString.indexOf(strDelimiter,iIndexOfInnerString))!=-1)
            {

                // Add string to
                // array.
                strArray[iCounter] = strString.substring(iIndexOfInnerString, iIndexOfDelimiter);

                // Increment the
                // index to the next
                // character after
                // the next
                // delimiter.
                iIndexOfInnerString = iIndexOfDelimiter + strDelimiter.length();

                // Inc the counter.
                iCounter += 1;
            }
                return strArray;
        }
}

你会得到如下图的输出