openrefine json history: get the DOI resolution url. doi value is in the column 2 of the table

gistfile1.json

[
  {
    "op": "core/column-addition",
    "description": "Create column url at index 2 based on column Column 2 using expression jython:import httplib\nconn = httplib.HTTPConnection(\"dx.doi.org\")\ndoi = \"/\"+value\nconn.request(\"HEAD\", doi)\nres = conn.getresponse()\nreturn res.getheader('location')",
    "engineConfig": {
      "facets": [],
      "mode": "row-based"
    },
    "newColumnName": "url",
    "columnInsertIndex": 2,
    "baseColumnName": "Column 2",
    "expression": "jython:import httplib\nconn = httplib.HTTPConnection(\"dx.doi.org\")\ndoi = \"/\"+value\nconn.request(\"HEAD\", doi)\nres = conn.getresponse()\nreturn res.getheader('location')",
    "onError": "set-to-blank"
  }
]