my_text = '\
var index_id = 0;\
var len = arr_id.length;\
while(index_id < len){\
    current_id = arr_id[index_id];\
    index_id = index_id + 1;\
    \
    offset = 0;\
    if (index_query == 0){\
        offset = initial_offset;\
    }\
}'

import textwrap


string_for_server = textwrap.dedent("""
    Your text
    In a Block
        4 spaces
        4 spaces
    """).lstrip()

Output:
Help on function dedent in module textwrap:

dedent(text)
    Remove any common leading whitespace from every line in `text`.
    
    This can be used to make triple-quoted strings line up with the left
    edge of the display, while still presenting them in the source code
    in indented form.
    
    Note that tabs and spaces are both treated as whitespace, but they
    are not equal: the lines "  hello" and "\thello" are
    considered to have no common leading whitespace.  (This behaviour is
    new in Python 2.5; older versions of this module incorrectly
    expanded tabs before searching for common leading whitespace.)