function _M.send_request()

in lib/resty/http.lua [603:675]

• 55 lines of code
• 17 McCabe index (conditional complexity)

function _M.send_request(self, params)
    
    setmetatable(params, { __index = DEFAULT_PARAMS })

    local sock = self.sock
    local body = params.body
    local headers = http_headers.new()

    local params_headers = params.headers
    if params_headers then
        
        
        for k, v in pairs(params_headers) do
            headers[k] = v
        end
    end

    

    if not headers["Content-Length"] then
        if type(body) == 'string' then
            headers["Content-Length"] = #body
        elseif body == nil and EXPECTING_BODY[str_upper(params.method)] then
            headers["Content-Length"] = 0
        end
    end
    if not headers["Host"] then
        if (str_sub(self.host, 1, 5) == "unix:") then
            return nil, "Unable to generate a useful Host header for a unix domain socket. Please provide one."
        end
        
        
        if self.port then
            if self.ssl and self.port ~= 443 then
                headers["Host"] = self.host .. ":" .. self.port
            elseif not self.ssl and self.port ~= 80 then
                headers["Host"] = self.host .. ":" .. self.port
            else
                headers["Host"] = self.host
            end
        else
            headers["Host"] = self.host
        end
    end
    if not headers["User-Agent"] then
        headers["User-Agent"] = _M._USER_AGENT
    end
    if params.version == 1.0 and not headers["Connection"] then
        headers["Connection"] = "Keep-Alive"
    end

    params.headers = headers

    
    local req = _format_request(params)
    if DEBUG then ngx_log(ngx_DEBUG, "\n", req) end
    local bytes, err = sock:send(req)

    if not bytes then
        return nil, err
    end

    
    
    if headers["Expect"] ~= "100-continue" then
        local ok, err, partial = _send_body(sock, body)
        if not ok then
            return nil, err, partial
        end
    end

    return true
end