parse content-Type multipart/form-data according to RFC2388

parse_form_protocol.lua

--parse content-Type  multipart/form-data  according to RFC2388.
function parse_form_protocol(query_data)
    local result = {}
    local boundary = get_boundary()
    if boundary == nil then
        return result
    end
    boundary = "--" .. boundary
    local regex = [[name="(\w+)"\s+([\S\s]+?)\s+?]] .. boundary
    for m in ngx.re.gmatch(query_data, regex) do
        local name = m[1]
        local value =m[2]
        result[name] = value
    end
    return result
end

function get_boundary()
    local header = ngx.var.content_type
    if not header then
        return nil
    end

    return string.match(header, ";%s+boundary=(%S+)")
end