func (client *Client) packRequest(r *yar.Request) ([]byte, *yar.Error) {
var sendPackager []byte
packagerName := client.Opt.Packager
if len(packagerName) < yar.PackagerLength {
sendPackager = []byte(packagerName)
} else {
sendPackager = []byte(packagerName[0:yar.PackagerLength])
}
var p [8]byte
for i, s := range sendPackager {
p[i] = s
}
r.Protocol.Packager = p
pack, err := packager.Pack(sendPackager, r)
if err != nil {
return nil, yar.NewError(yar.ErrorPackager, err.Error())
}
return pack, nil
}
func (client *Client) Call(method string, ret interface{}, params ...interface{}) *yar.Error {
if client.net == "http" || client.net == "https" {
return client.httpHandler(method, ret, params...)
}
return yar.NewError(yar.ErrorConfig, "unsupported non http protocol")
}
func (client *Client) httpHandler(method string, ret interface{}, params ...interface{}) *yar.Error {
r, err := client.initRequest(method, params...)
if err != nil {
return err
}
packBody, err := client.packRequest(r)
if err != nil {
return err
}
r.Protocol.BodyLength = uint32(len(packBody) + yar.PackagerLength)
postBuffer := bytes.NewBuffer(r.Protocol.Bytes().Bytes())
postBuffer.Write(packBody)
//todo 停止验证HTTPS请求
tr := &http.Transport{
TLSClientConfig: &tls.Config{InsecureSkipVerify: true},
}
if client.Opt.DNSCache == true {
tr.Dial = func(network string, address string) (net.Conn, error) {
separator := strings.LastIndex(address, ":")
ips, err := globalResolver.Lookup(address[:separator])
if err != nil {
return nil, errors.New("Lookup Error:" + err.Error())
}
if len(ips) < 1 {
return nil, errors.New("Lookup Error: No IP Resolver Result Found")
}
return net.Dial("tcp", ips[0].String()+address[separator:])
}
}
httpClient := &http.Client{
Transport: tr,
Timeout: time.Duration(client.Opt.Timeout) * time.Millisecond,
}
resp, postErr := httpClient.Post(client.hostname, "application/json", postBuffer)
if postErr != nil {
return yar.NewError(yar.ErrorNetwork, postErr.Error())
}
responseErr := client.readResponse(resp.Body, ret)
return responseErr
}
func (client *Client) readResponse(reader io.Reader, ret interface{}) *yar.Error {
allBody, err := ioutil.ReadAll(reader)
if err != nil {
return yar.NewError(yar.ErrorResponse, "Read Response Error:"+err.Error())
}
if len(allBody) < (yar.ProtocolLength + yar.PackagerLength) {
return yar.NewError(yar.ErrorResponse, "Response Parse Error:"+string(allBody))
}
protocolBuffer := allBody[0 : yar.ProtocolLength+yar.PackagerLength]
protocol := yar.NewHeader()
protocol.Init(bytes.NewBuffer(protocolBuffer))
bodyLength := protocol.BodyLength - yar.PackagerLength
if uint32(len(allBody)-(yar.ProtocolLength+yar.PackagerLength)) < uint32(bodyLength) {
return yar.NewError(yar.ErrorResponse, "Response Content Error:"+string(allBody))
}
bodyBuffer := allBody[yar.ProtocolLength+yar.PackagerLength:]
response := new(yar.Response)
err = packager.Unpack([]byte(client.Opt.Packager), bodyBuffer, &response)
if err != nil {
return yar.NewError(yar.ErrorPackager, "Unpack Error:"+err.Error())
}
if response.Status != yar.ERR_OKEY {
return yar.NewError(yar.ErrorResponse, response.Error)
}
if ret != nil {
packData, err := packager.Pack([]byte(client.Opt.Packager), response.Retval)
if err != nil {
return yar.NewError(yar.ErrorPackager, "pack response retval error:"+err.Error()+" "+string(allBody))
}
err = packager.Unpack([]byte(client.Opt.Packager), packData, ret)
if err != nil {
return yar.NewError(yar.ErrorPackager, "pack response retval error:"+err.Error()+" "+string(allBody))
}
}
return nil
}
// 获取一个YAR 客户端
// addr为带请求协议的地址。支持以下格式
// http://xxxxxxxx
// https://xxxx.xx.xx
// tcp://xxxx
// udp://xxxx
func NewClient(addr string) (*Client, *yar.Error) {
netName, err := parseAddrNetName(addr)
if err != nil {
return nil, yar.NewError(yar.ErrorParam, err.Error())
}
client := new(Client)
client.hostname = addr
client.net = netName
client.Opt = yar.NewOpt()
client.init()
return client, nil
}
func (client *Client) initRequest(method string, params ...interface{}) (*yar.Request, *yar.Error) {
r := yar.NewRequest()
if len(method) < 1 {
return nil, yar.NewError(yar.ErrorParam, "call empty method")
}
if params == nil {
r.Params = []interface{}{}
} else {
r.Params = params
}
r.Method = method
r.Protocol.MagicNumber = client.Opt.MagicNumber
r.Protocol.Id = r.Id
return r, nil
}
func (client *Client) sockHandler(method string, ret interface{}, params ...interface{}) *yar.Error {
return yar.NewError(yar.ErrorParam, "unsupported sock request")
}