How to parse attributes in ruby?

ruby-talk
1

Dear friends,

I'am in process of creating a new parser class. My parser was showing
parsing errors in case of input like,

    <product prod_name="jean" size=" 24" boot-cut" price="$99">

i have got parsing error in attributes values " 24" boot-cut". I was
reading attributes values from " to ". But in above case double
quotes(") comes three times so my parser was not able to read it
properly.

How to solve the above problem?

Thanks in advance

Regards,
Martin

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2

I'd suggest you require that "s within strings be escaped somehow.
Otherwise, the input is ambiguous - it might as well be 'size = "24"'
followed by an unterminated '"boot cut'

martin

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On Wed, Feb 27, 2008 at 1:03 AM, dare ruby <martin@angleritech.com> wrote:

Dear friends,

  I'am in process of creating a new parser class. My parser was showing
parsing errors in case of input like,

    <product prod_name="jean" size=" 24" boot-cut" price="$99">

i have got parsing error in attributes values " 24" boot-cut". I was
reading attributes values from " to ". But in above case double
quotes(") comes three times so my parser was not able to read it
properly.

How to solve the above problem?

3

dare ruby wrote:

My parser was showing
parsing errors in case of input like,

&lt;product prod\_name=&quot;jean&quot; size=&quot; 24&quot; boot\-cut&quot; price=&quot;$99&quot;&gt;

Well, in case that the input is supposed to be XML, your parser was right to
do so as the above is not valid.

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4

Thank you sebastian and martin. so its invalid to pass xml like that i
hope.
The attribute value should be like,

    size=' 24" boot-cut '

    or like,

    size=" 24' boot-cut"

Is the above xml is valid. Please suggest a better way of inputs in
proper xml for above attributes.

regards,
Martin

···

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5

dare ruby wrote:

Thank you sebastian and martin. so its invalid to pass xml like that i hope.
The attribute value should be like,

    size=' 24" boot-cut '

    or like,

    size=" 24' boot-cut"

Is the above xml is valid. Please suggest a better way of inputs in proper xml for above attributes.

Yes, it's valid, but I suggest a better way:

   size=" 24&quot; boot-cut"

Replacing " with its XML entity &quot;. Any attribute value should be processed to replace special XML characters ("'<>&) with their entity.

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Michel Casabianca
michel.casabianca@gmail.com