blocks|key|1795525|text|我不知道你是怎么发邮件的.如果将其传递给php脚本，然后将其发送到邮件服务器或使用mail()方法，则此链接可能会有所帮助。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1795526|http://php.net/manual/en/function.wordwrap.php|offset|length|1795527|如果没有，你能澄清一下你的问题吗？|1795528|另一个简单的想法是，您可以使用:+html.replace(''，'\r\n')；或:+html.replace(''，‘’%2BString.from+carriage+(13))；//插入回车|1795529|但是，由于will在理想情况下是在浏览器中解析的，插入"\r\n“可能无效，实际上可能只是显示为”\r\n“.|1795530|希望这一切都有帮助。|1795531|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|1A|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@$D|W|E|X|1|Y]]|A|$]]|$1|F|3|G|5|6|7|Z|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|10|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|12|8|@]|9|@]|A|$]]|$1|N|3|-4|5|6|7|13|8|@]|9|@]|A|$]]]|O|$P|$5|Q|R|S|A|$T|C]]]]

I am not sure how you are delivering your email... if it is handed off to a php script that then send it to a mail server or uses the mail() method, then this link might help.

<a href="http://php.net/manual/en/function.wordwrap.php" rel="nofollow">http://php.net/manual/en/function.wordwrap.php</a>

If not, can you clarify your question a bit?

Another simply thought, is that you could use:
 html.replace('','\r\n');
or:
 html.replace('',''+String.fromCharCode(13));//inserts a carriage return

However, since the will ideally be parsed in the browser, inserting "\r\n" may not be effective and may actually just display as "\r\n"....

Hope any of this is helpful.

blocks|key|1795590|text|Email+哑剧标准使用传输编码技术来解决这个问题。理想情况下，您可以使用一个邮件库来处理这个问题，这样您就可以插入任意长度的行。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1795591|使用System.Net.Mail.MailMessage类在C#中，您应该能够构造一个正常的消息，它将为您传输-编码它。如果不起作用，还可以使用单个System.Net.Mail.AlternativeView构造多部分消息，并显式设置传输编码。|style|CODE|1795592|下面是我目前使用的一个示例(注意，它有一个字符编码错误，所以正文文本必须是unicode字符串)：|1795593|private+void+Send(string+body,+bool+isHtml,+string+subject,+string+recipientAddress,+string+recipientName,+string+fromAddress)
{
++++using+(var+message+=+new+MailMessage(new+MailAddress(fromAddress),
++++++++++++++++++++++++++++++++++++new+MailAddress(recipientAddress,+recipientName)))
++++{
++++++++message.Subject+=+subject;
++++++++var+alternateView+=+AlternateView.CreateAlternateViewFromString(body,+message.BodyEncoding,
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++isHtml+?+"text/html"+:+"text/plain");
++++++++alternateView.TransferEncoding+=+TransferEncoding.QuotedPrintable;
++++++++message.AlternateViews.Add(alternateView);

++++++++var+client+=+new+SmtpClient();

++++++++client.Send(message);
++++}
}|code-block|syntax|javascript|1795594|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/MIME|1|http://en.wikipedia.org/wiki/MIME#Content-Transfer-Encoding^0|6|2|0|C|4|1|0|2|R|23|V|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@$A|Z|B|10|1|11]|$A|12|B|13|1|14]]|C|$]]|$1|D|3|E|5|6|7|15|8|@$A|16|B|17|F|G]|$A|18|B|19|F|G]]|9|@]|C|$]]|$1|H|3|I|5|6|7|1A|8|@]|9|@]|C|$]]|$1|J|3|K|5|L|7|1B|8|@]|9|@]|C|$M|N]]|$1|O|3|-4|5|6|7|1C|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]|W|$5|R|S|T|C|$U|X]]]]

Email <a href="http://en.wikipedia.org/wiki/MIME" rel="nofollow">MIME</a> standard uses <a href="http://en.wikipedia.org/wiki/MIME#Content-Transfer-Encoding" rel="nofollow">transfer encoding</a> techniques to solve this problem. Ideally you would be using a mail library that takes care of this for you, so you can insert lines of any length.

Using the <code>System.Net.Mail.MailMessage</code> class in C#, you should be able to construct a normal message and it will transfer-encode it for you. If that doesn't work, you can also construct a multi-part message with a single <code>System.Net.Mail.AlternativeView</code> and set the transfer-encoding explicitly.

Here is a sample I am currently using (note it has a character encoding bug, so your body text must be a unicode string):

<pre><code>private void Send(string body, bool isHtml, string subject, string recipientAddress, string recipientName, string fromAddress)
{
 using (var message = new MailMessage(new MailAddress(fromAddress),
 new MailAddress(recipientAddress, recipientName)))
 {
 message.Subject = subject;
 var alternateView = AlternateView.CreateAlternateViewFromString(body, message.BodyEncoding,
 isHtml ? "text/html" : "text/plain");
 alternateView.TransferEncoding = TransferEncoding.QuotedPrintable;
 message.AlternateViews.Add(alternateView);

 var client = new SmtpClient();

 client.Send(message);
 }
}
</code></pre>

blocks|key|1795620|text|如果您对内容进行了Base64编码，那么您可以将内容拆分为您想要的任何行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1795621|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

If you Base64 encode the content, then you can break up the content into however many lines you want.

blocks|key|1795643|text|您正在进入危险领土，试图使用替换函数解析HTML。最简单的方法是在表单上显示一个警告框，通知用户行不能超过1000个字符，如果用户试图提交长度超过1000个字符的内容，则返回错误消息。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1795644|否则，您可以在X个字符的后面插入一个换行符，并插入一些特殊的标记(例如或类似的标记)，通知接收电子邮件的人插入了一个自动中断行。|1795645|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454^0|5|4|0|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]]|C|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@]|C|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|C|$]]]|G|$H|$5|I|J|K|C|$L|M]]]]

You're getting into <a href="https://stackoverflow.com/questions/1732348/regex-match-open-tags-except-xhtml-self-contained-tags/1732454#1732454">dangerous territory</a> attempting to parse HTML with a replace function. The easiest method would be to just display a warning box on the form that tells the user that lines cannot be longer than 1000 characters, and return an error message if they attempt to submit content with lines over that length.

Otherwise, you could insert a linebreak after X number of characters, and insert some special markup (like &lt;!--AUTO-LINEBREAK-->, or similar) that informs whoever is receiving the e-mail that an automatic line break was inserted.

blocks|key|597208|text|在你认为应该出现的地方添加普通的断线。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|597209|从我的头顶上，找到所有的、<table>、<tr>、<td>、 和<div>标签，并在它们前面添加一个\r\n。|offset|length|style|CODE|597210|一旦完成，再循环一遍所有的行。如果仍然有任何1000%2B字符是长的，我将在空格中插入一个\r\n。|597211|此外，您应该从HTML电子邮件正文中删除任何脚本标记。拥有脚本标记会导致所有类型的问题(标记为垃圾邮件、标记为病毒、阻塞等等)。|597212|entityMap^0|0|C|3|G|7|O|4|T|4|Y|4|13|5|1L|4|0|17|4|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@$D|P|E|Q|F|G]|$D|R|E|S|F|G]|$D|T|E|U|F|G]|$D|V|E|W|F|G]|$D|X|E|Y|F|G]|$D|Z|E|10|F|G]|$D|11|E|12|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|13|8|@$D|14|E|15|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|M|$]]

Add normal line breaks where you think they should be. For example:

Off the top of my head, find all <code>&lt;p&gt;</code>, <code>&lt;table&gt;</code>, <code>&lt;tr&gt;</code>,<code>&lt;td&gt;</code>,<code>&lt;br&gt;</code>, and <code>&lt;div&gt;</code> tags and add a <code>\r\n</code> right before them.

Once that is done, loop through all the lines one more time. If there are any that are still 1000+ characters long, I would insert a <code>\r\n</code> in the whitespace.

Also, you should be removing any script tags from the HTML email body. Having script tags can cause all types of problems (marked as spam, marked as a virus, blocked, etc..).

I have an application allows a user to copy paste html into a form. This html gets sent as an email, and the <a href="http://www.eggheadcafe.com/software/aspnet/30386381/smtp-exchange-2000-1000-characters-per-line-truncation.aspx" rel="nofollow">email server will not allow more than 1000 characters per line</a>. So, I'd like to insert line breaks (\r\n) into the html after the user has hit submit. How can I do this without changing the content?

My idea is this:

<pre><code>html.replace('&lt;', '\r\n&lt;');
</code></pre>

But is that guaranteed to not change the result? Is '&lt;' not allowed in attributes?

Edit: I'm actually thinking this will not work because the html could have a script block with something like if(x &lt; 3). I guess what I need is an html pretty printer that works in either js or C#.

Safely insert line breaks into HTML

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我有一个允许用户将html复制到表单中的应用程序。此html以电子邮件的形式发送，。因此，在用户点击submit之后，我想在html中插入换行符(\r\n)。我如何在不改变内容的情况下做到这一点？我的想法是：html.replace('<', '\r\n<');但这肯定不会改变结果吗？属性中不允许“<”吗？编辑：我实际...

问安全地将行插入HTML
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