用Obj-C发送一个放大器（&） [英] Sending an amp (&) using a post with Obj-C

问题描述

我正在发送一个包含文本，数字和数据的帖子。数字和数据工作正常，但我在文本中有问题，因为它可能包含&符号（&）。例如

  page.php？text = Hello World&空间。 
  

现在我发现&被服务器接收，但读取好像一个新的变量启动。所以看到（我想）：

  text =Hello World
空格。 = 
  

我读过，我可以尝试对文本进行编码，使其看起来像一个URL（像[space]变成％20），但没有办法正确编码。我得出结论：

  textToPOST = [text stringByAddingPercentEscapesUsingEncoding：NSASCIIStringEncoding]; 
  

但是并不对&符号进行编码，而是对其他任何东西进行编码。所以结果是：

  some text& uuml; blablabla 
  

变成

 一些％20text％20& uuml;％20blablabla 
  

没有编码。那么我该怎么做，请帮忙。

非常感谢

解决方案感谢您的答复，感谢您的过早发表：SI希望至少帮助任何与我一样的问题。我只是和一个朋友聊天，他告诉我：

要在XML中显示和&符号，只需使用& amp; amp; amp;引用。与纯粹的&不同，NSXMLParser不会输出错误。使用& amp; amp还允许您进行其他符号转义，如：

• ü [在文中] - >& uuml; [在HTML] - >& amp; amp; uuml; [in XML]
• Ä [在文中] - >& Auml; [在HTML] - >& amp; amp; amp; amp; amp; amp; [in XML]
• ß [在文中] - >& szlig; [在HTML] - >& amp; amp; szlig; [in XML]
• 等...

所以这就是解决 em>如何使用放大器解析XML问题。此外，我设法使代码，从我链接到我的原始问题的评论的网站，工作：

  NSMutableString * deutschEscaped = [NSMutableString stringWithString：[[deutschTextLabel string] stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding]]; 
 [deutschEscaped replaceOccurrencesOfString：@$withString：@％24选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@& withString：@％26选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@+withString：@％2B选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@，withString：@％2C选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@/withString：@％2F选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@：withString：@％3A选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@; withString：@％3B选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@=withString：@％3D选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@？ withString：@％3F选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@@withString：@％40选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@withString：@％20选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@\twithString：@％09选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@＃withString：@％23选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@< withString：@％3C选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@> withString：@％3E选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@\withString：@％22选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
 [deutschEscaped replaceOccurrencesOfString：@\\\
 withString：@％0A选项：NSCaseInsensitiveSearch范围：NSMakeRange（0，[deutschEscaped length]）]; 
  

这对我来说可以正常工作，并且取代了&符号和任何其他可能的危险。

如果您不希望每个空间都有许多％20转义，您还可以使用：

  NSMutableString * englishEscaped = [NSMutableString stringWithString：[[englishTextLabel string] stringByAddingPercentEscapesUsingEncoding：NSUTF8StringEncoding]]; 
  

谢谢大家：）

I am sending a post containing text, numbers and data. The numbers and data work fine, but I'm having problems with the text, since it may contain an ampersand (&). For example

page.php?text=Hello World & Space.

Now I found that the "&" is received by server, but read as if a new variable starts. So it sees (I think):

text = "Hello World "
Space. =

I did read that I could try to encode the text to make it look like it's a URL (like " " [space] turns into "%20") but there is no way to encode it properly. I came to the conclusion:

textToPOST = [text stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding];

But that does NOT encode the ampersands, but everything else. So the result is:

some text ü blablabla

turns into

some%20text%20ü%20blablabla

with the & not encoded. So how can I do this, please help.

Thanks a lot already

解决方案

Thanks for that answer and sorry for my premature posting :S I hope it at least helps anybody who has the same issue as I had. I just had a chat with a friend and he told me:

To display and ampersand in XML simply use the & quote. Unlike with a pure "&", the NSXMLParser won't output an error. Using & also allows you to make other symbol escapes like:

• ü [in text] -> ü [in HTML] -> ü [in XML]
• Ä [in text] -> Ä [in HTML] -> Ä [in XML]
• ß [in text] -> ß [in HTML] -> ß [in XML]
• etc...

So that's how you solve the "How do I parse XML with an amp in it problem". Also I managed to make the code, from the website I linked in a comment to my original question, work:

NSMutableString *deutschEscaped = [NSMutableString stringWithString:[[deutschTextLabel string] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
[deutschEscaped replaceOccurrencesOfString:@"$" withString:@"%24" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"&" withString:@"%26" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"+" withString:@"%2B" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"," withString:@"%2C" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"/" withString:@"%2F" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@":" withString:@"%3A" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@";" withString:@"%3B" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"=" withString:@"%3D" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"?" withString:@"%3F" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"@" withString:@"%40" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@" " withString:@"%20" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"\t" withString:@"%09" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"#" withString:@"%23" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"<" withString:@"%3C" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@">" withString:@"%3E" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"\"" withString:@"%22" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];
[deutschEscaped replaceOccurrencesOfString:@"\n" withString:@"%0A" options:NSCaseInsensitiveSearch range:NSMakeRange(0, [deutschEscaped length])];

This works fine for me and does replace ampersands and any other possible hazards.

If you don't want many %20 escapes for every space, you can also use:

NSMutableString *englishEscaped = [NSMutableString stringWithString:[[englishTextLabel string] stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];

Thank you all :)

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