opensips String transformations | Generating MD5 hash from opensips.cfg | String to Integer convertion in core script

String Transformations

The name of these transformation starts with 's.'. They are intended to apply string operations to variables.

Available transformations in this class:

1.1 {s.len}

Return strlen of variable value

$var(x) = "abc";
if($(var(x){s.len}) == 3)
{
   ...
}

1.2 {s.int}

Return integer value of a string-represented number

$var(x) = "1234";
if($(var(x){s.int})==1234) {
  ...
}

1.3 {s.md5}

Return md5 over variable value

xlog("MD4 over From username: $(fU{s.md5})");

1.4 {s.substr,offset,length}

Return substring starting at offset having size of 'length'. If offset is negative, then it is counted from the end of the value, -1 being the last char. In case of positive value, 0 is first char. Length must be positive, in case of 0, substring to the end of variable value is returned. offset and length can be a varibale as well.

Example:

$var(x) = "abcd";
$(var(x){s.substr,1,0}) = "bcd"

1.5 {s.select,index,separator}

Return a field from the value of a variable. The field is selected based on separator and index. The separator must be a character used to identify the fields. Index must be a integer value or a variable. If index is negative, the count of fields starts from end of value, -1 being last field. If index is positive, 0 is the first field.

Example:

$var(x) = "12,34,56";
$(var(x){s.select,1,,}) => "34" ;

$var(x) = "12,34,56";
$(var(x){s.select,-2,,}) => "34"