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MSPBlock

MSPBlock[{vari, ...}, body]
interpret the argument variables and replace in the body
MSPBlock[{vari, ...}, body, defvalue]
if any of the variables do not have values, defvalue is returned
  • This is one of the key ways to work with variables from the HTTP request.
  • MSPBlock takes each of the variables var_i, interprets them, and then replaces any occurrences in body with the interpreted value.
  • If any variables do not have values, an empty string is returned.
  • The following exceptions can be thrown by MSPBlock.
MSPException["ParseError"]if the value cannot be interpreted by Mathematica
MSPException["SecurityError"]if the value does not pass the security test
MSPException["ValueError"]if the value is not a string, this indicates a programmatic error by the page author
MSPException["VariableError"]if the variable is not a Mathematica symbol, this indicates a programmatic error by the page author
EXAMPLESCLOSE ALL
Basic Examples   (1)
You can simulate how the functions work by loading the package and setting the security content.
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Here the variable $$var is assigned to the value "5+7"; note that the value is a string.
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When MSPBlock evaluates, all occurrences of $$var are replaced by its interpreted value.
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If the input value cannot be interpreted, an MSPException is thrown.
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If the input value does not pass the security test, an MSPException is thrown.
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Input can also be given in MathML.
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