Question

我编写了一个C ++程序，允许将网址发布到YouTube上。它的工作原理是将URL作为输入从您输入程序或直接输入，然后它将替换每个'/'，'。'在带有'*'的字符串中。然后将此修改后的字符串放在剪贴板上（这仅适用于Windows用户）。

当然，在我甚至可以调用该程序之前，它必须返回：我需要知道何时在URL中使用'。'，'/'。我查看了这篇文章：http://en.wikipedia.org/wiki/Uniform_Resource_Locator，并且知道'。'在处理“主网站”时使用（在此网址的情况下为“en.wikipedia.org”），之后使用“/”，但我去过其他网站http://msdn.microsoft.com/en-us/library/windows/desktop/ms649048%28v=vs.85%29.aspx，根本不是这种情况（它甚至分别用“％28”，“％29”代替'（'，'）'！）

我似乎还要求.aspx文件，不管是什么。还有一个'。'在该URL的括号内。我甚至试图查看关于URL的正则表达式（我还没有完全理解那些......）。有人可以告诉我（或链接我）关于在URL中使用'。'，'/'的规则吗？

Answer 1

你能解释一下你为什么要做这个令人费解的事吗？你想要实现什么目标？一旦你回答了这个问题，你可能不需要像你想的那样知道。

同时这里有一些信息。 URL实际上由许多部分组成

http:     - the "scheme" or protocol used to access the resource. "HTTP", "HTTPS",
            "FTP", etc are all examples of a scheme. There are many others

//        - separates the protocol from the host (server) address

myserver.org - the host. The host name is looked up against a DNS (Dynamic Name Server)
            service and resolved to an IP address - the "phone number" of the machine
            which can serve up the resource (like "98.139.183.24" for www.yahoo.com)

www.myserver.org - the host with a prefix. Sometimes the same domain (`myserver.org`)
            connects multiple servers (or ports) and you can be sent straight to the
            right server with the prefix (mail., www., ftp., ... up to the
            administrators of the domain). Conventionally, a server that serves content
            intended for viewing with a browser has a `www.` prefix, but there's no rule
            that says this must be the case. 

:8080/    - sometimes, you see a colon followed by up to five digits after the domain.
            this indicates the PORT on the server where you are accessing data
            some servers allow certain specific services on just a particular port
            they might have a "public access" website on port 80, and another one on 8080
            the https:// protocol defaults to port 443, there are ports for telnet, ftp, 
            etc. Add these things only if you REALLY know what you are doing.

/the/pa.th/ this is the path relative to DOCUMENTROOT on the server where the
            resource is located. `.` characters are legal here, just as they are in
            directory structures. 

file.html
file.php
file.asp
etc       - usually the resource being fetched is a file. The file may have
            any of a great number of extensions; some of these indicate to the server that
            instead of sending the file straight to the requester,
            it has to execute a program or other instructions in this file,
            and send the result of that
            Examples of extensions that indicate "active" pages include
            (this is not nearly exhaustive - just "for instance"):
            .php = contains a php program
            .py  = contains a python program
            .js  = contains a javascript program
                   (usually called from inside an .htm or .html)
            .asp = "active server page" associated with a
                   Microsoft Internet Information Server

？

东西=值安培; somethingElse =％23othervalue％23 传递给服务器的参数可以显示在URL中。这可用于传递参数，表单中的条目等。任何角色都可以在这里传递 - 包括'。'，'＆amp;'，'/'，...... 但你不能只在字符串中写下这些字符......

现在是有趣的部分。

网址不能包含某些字符（实际上很多）。为了解决这个问题，存在一种称为“转义”字符的机制。通常，这意味着用十六进制等效替换字符，前缀为%符号。因此，您经常会看到一个空格字符，例如％20。你可以找到一份简单的清单here

有许多功能可用于将URL中的“非法”字符自动转换为“合法”值。

要了解确切的内容和不允许的内容，您需要回到原始规格。参见例如

http://www.ietf.org/rfc/rfc1738.txt

http://www.ietf.org/rfc/rfc2396.txt

http://www.ietf.org/rfc/rfc3986.txt

我按时间顺序列出它们 - 最后一个是最新的。

但我重复一下我的问题 - 你真的想在这做什么，为什么？

URL常规格式

1 个答案: