Adapt different stream data prefix, with or without space

[panzhongxian]

This is an alternative to another PR #932

Instead of compare header string, this PR use regex pattern to match and replace the header. It seems a more clear way to implement it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.88%. Comparing base (774fc9d) to head (11cdb5a).
Report is 87 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #945      +/-   ##
==========================================
+ Coverage   98.46%   98.88%   +0.41%     
==========================================
  Files          24       27       +3     
  Lines        1364     1786     +422     
==========================================
+ Hits         1343     1766     +423     
+ Misses         15       14       -1     
  Partials        6        6              

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[panzhongxian]

@sashabaranov Sorry to disturb you. I can't reopen the old one PR #941 after rebasing and force pushing. So I create a new one.