从IP地址获取URL [英] Get URL from IP Address

问题描述

如果我有IP地址，在C ++(Windows)中是否可以获取网站的网址?谢谢您的帮助或指导.

Is there a way in C++ (Windows) to get the URL of a website if I have the IP address? Thank you for any help or direction.

推荐答案

尽管您可能能够从IP地址获取网站的URL，但不能确定你有合适的人.

多个网站可以托管在一个IP地址上，因此，您最好希望的是反向DNS查找将为您提供网站名称-它可能仅为您提供服务器名称.

示例:dig www.google.com为我提供了一个具有6个IP地址的CNAME:

While you might be able to get the URL of a website from an IP address, you can''t be sure that you''ve got the right one.

Multiple websites can be hosted on a single IP address, so the best you can hope for is that a reverse DNS lookup will give you the name of a website - it might just give you a server name.

Example: dig www.google.com gives me a CNAME with 6 IP addresses:

www.google.com.         86399   IN      CNAME   www.l.google.com.
www.l.google.com.       299     IN      A       209.85.146.105
www.l.google.com.       299     IN      A       209.85.146.99
www.l.google.com.       299     IN      A       209.85.146.104
www.l.google.com.       299     IN      A       209.85.146.106
www.l.google.com.       299     IN      A       209.85.146.147
www.l.google.com.       299     IN      A       209.85.146.103

在这些地址中的第一个(dig -x 209.85.146.105)上进行反向DNS查找会给我一个不同的名称:

Reverse DNS lookup on the first of these addresses (dig -x 209.85.146.105) gives me a different name:

105.146.85.209.in-addr.arpa. 86400 IN   PTR     bru01s01-in-f105.1e100.net.

-没有任何关于任何网站的有用信息.

- which doesn''t say anything useful about any websites.

您不能.
URL与IP之间的关系不是1/1，URL比IP更抽象的概念:URL是为不同目的量身定制的:URL告诉您想要的页面，IP告诉在哪里可以找到它.

IP名称和IP地址id之间的映射由称为域名系统"的层次结构冗余分布式数据库管理，该数据库的API由get_host_by_name和get_name_by_host函数表示.

DNS返回呼叫的任何方式或其他都不取决于您的方式，并且DNS标准不需要该呼叫来表示对合(因此get_name_by_host(get_host_by_name(name)) != name)，

基本上，在这个世界上，甚至还有许多无关的人都以史密斯"作为姓氏，您的疑问听起来像是是否有史密斯的名字?".

You can''t.
The relation between URL and IP is not 1/1, and URLs are more abstract concept than IPs: They are tailored to different purposes: The URL tells WHAT page you want, the IP tells WHERE it can be found.

The mapping between IP names and IP addresses id managed by a hierarchical redundant distributed database called "Domain Name System", whose API are represented by the get_host_by_name and get_name_by_host functions.

Whatever the DNS returns to a call or the other does not depend on you, ant it is not required by the DNS standard for that calls to represent an involution (hence get_name_by_host(get_host_by_name(name)) != name),

Basically you question sounds like "Is there a way to get the name of Smith?", in a world that has many even unrelated people having "Smith" as a surname.

嗯，那无法获取URL，而是将IP地址(二进制)作为标准IP地址获取为字符串，并在数字之间加上点号.

哦，顺便说一句，sockAddr.sin_addr.s_addr字段在您询问有关比较地址的另一个问题中可能对您确实有用.

uh, that doesn''t get a URL, it gets the IP address (binary) as a standard IP address as a string of characters with the dots between the numbers.

Oh, BTW, the sockAddr.sin_addr.s_addr field might be real useful to you in the other question you asked about comparing addresses.

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