Logging if certain HTTP Query Strings are Null

Not pretty, but it seems to work assuming I have the scenario correct:

 

 

scan [string range [HTTP::query] [string first "s_sample=" [HTTP::query]] end] {s_sample=%[^&]&t_sample=%[^&]&u_sample=%[^&]}

 

 

Here is a description of the steps:

 

 

Save a test query with some parameters and values including the three sample parameters in order

 

set query {blah=val&s_sample=s_sample_value&t_sample=t_sample_value&u_sample=u_sample_value&blah=val2}

 

 

Get the index of the first sample parameter

 

string first "s_sample=" $query

 

 

Trim off everything up to the first sample parameter name

 

string range $query [string first "s_sample=" $query] end

 

 

Scan the trimmed string to get the values for the three sample parameters. If it doesn't return 3, then one or more of the parameters wasn't matched and parsed

 

scan [string range $query [string first "s_sample=" $query] end] {s_sample=%[^&]&t_sample=%[^&]&u_sample=%[^&]}

 

 

I'm guessing there might be a cleaner solution if you can give more detail on the scenario.

 

 

Aaron