webmcp
annotate framework/env/request/get_header.lua @ 466:2751b6b81c23
Minor efficiency enhancement in <db_object>:try_save() method
| author | jbe |
|---|---|
| date | Mon Nov 07 19:32:51 2016 +0100 (2016-11-07) |
| parents | 6bbef2933ea5 |
| children |
| rev | line source |
|---|---|
| jbe@456 | 1 --[[-- |
| jbe@456 | 2 value = -- value of header as string containing comma (and space) separated values |
| jbe@456 | 3 request.get_header( |
| jbe@456 | 4 key -- name of header, e.g. "Authorization" |
| jbe@456 | 5 ) |
| jbe@456 | 6 |
| jbe@457 | 7 Returns the value of an HTTP header sent by the client. If the header occurs multiple times, the values are concatenated with a comma and zero or more space characters (e.g. "value1, value2"). If the header is missing, nil is returned. |
| jbe@456 | 8 |
| jbe@456 | 9 --]]-- |
| jbe@456 | 10 |
| jbe@456 | 11 function request.get_header(key) |
| jbe@457 | 12 local http_request = request._http_request |
| jbe@458 | 13 local values = http_request.headers[key] |
| jbe@457 | 14 if #values == 0 then |
| jbe@457 | 15 return nil |
| jbe@457 | 16 elseif #values == 1 then |
| jbe@457 | 17 return values[1] |
| jbe@457 | 18 else |
| jbe@458 | 19 return http_request.headers_csv_string[key] |
| jbe@457 | 20 end |
| jbe@456 | 21 end |