mirror of
https://github.com/eiblog/eiblog.git
synced 2026-02-11 17:02:27 +08:00
345 lines
7.2 KiB
Go
345 lines
7.2 KiB
Go
package rpc
|
|
|
|
import (
|
|
"bytes"
|
|
"encoding/json"
|
|
"errors"
|
|
"io"
|
|
"io/ioutil"
|
|
"net/http"
|
|
"net/url"
|
|
"strings"
|
|
|
|
"qiniupkg.com/x/reqid.v7"
|
|
|
|
. "golang.org/x/net/context"
|
|
)
|
|
|
|
var (
|
|
UserAgent = "Golang qiniu/rpc package"
|
|
)
|
|
|
|
var (
|
|
ErrInvalidRequestURL = errors.New("invalid request url")
|
|
)
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
type Client struct {
|
|
*http.Client
|
|
}
|
|
|
|
var (
|
|
DefaultClient = Client{&http.Client{Transport: http.DefaultTransport}}
|
|
)
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
func newRequest(method, url1 string, body io.Reader) (req *http.Request, err error) {
|
|
|
|
var host string
|
|
|
|
// url1 = "-H <Host> http://<ip>[:<port>]/<path>"
|
|
//
|
|
if strings.HasPrefix(url1, "-H") {
|
|
url2 := strings.TrimLeft(url1[2:], " \t")
|
|
pos := strings.Index(url2, " ")
|
|
if pos <= 0 {
|
|
return nil, ErrInvalidRequestURL
|
|
}
|
|
host = url2[:pos]
|
|
url1 = strings.TrimLeft(url2[pos+1:], " \t")
|
|
}
|
|
|
|
req, err = http.NewRequest(method, url1, body)
|
|
if err != nil {
|
|
return
|
|
}
|
|
if host != "" {
|
|
req.Host = host
|
|
}
|
|
return
|
|
}
|
|
|
|
func (r Client) DoRequest(ctx Context, method, url string) (resp *http.Response, err error) {
|
|
|
|
req, err := newRequest(method, url, nil)
|
|
if err != nil {
|
|
return
|
|
}
|
|
return r.Do(ctx, req)
|
|
}
|
|
|
|
func (r Client) DoRequestWith(
|
|
ctx Context, method, url1 string,
|
|
bodyType string, body io.Reader, bodyLength int) (resp *http.Response, err error) {
|
|
|
|
req, err := newRequest(method, url1, body)
|
|
if err != nil {
|
|
return
|
|
}
|
|
req.Header.Set("Content-Type", bodyType)
|
|
req.ContentLength = int64(bodyLength)
|
|
return r.Do(ctx, req)
|
|
}
|
|
|
|
func (r Client) DoRequestWith64(
|
|
ctx Context, method, url1 string,
|
|
bodyType string, body io.Reader, bodyLength int64) (resp *http.Response, err error) {
|
|
|
|
req, err := newRequest(method, url1, body)
|
|
if err != nil {
|
|
return
|
|
}
|
|
req.Header.Set("Content-Type", bodyType)
|
|
req.ContentLength = bodyLength
|
|
return r.Do(ctx, req)
|
|
}
|
|
|
|
func (r Client) DoRequestWithForm(
|
|
ctx Context, method, url1 string, data map[string][]string) (resp *http.Response, err error) {
|
|
|
|
msg := url.Values(data).Encode()
|
|
if method == "GET" || method == "HEAD" || method == "DELETE" {
|
|
if strings.ContainsRune(url1, '?') {
|
|
url1 += "&"
|
|
} else {
|
|
url1 += "?"
|
|
}
|
|
return r.DoRequest(ctx, method, url1 + msg)
|
|
}
|
|
return r.DoRequestWith(
|
|
ctx, method, url1, "application/x-www-form-urlencoded", strings.NewReader(msg), len(msg))
|
|
}
|
|
|
|
func (r Client) DoRequestWithJson(
|
|
ctx Context, method, url1 string, data interface{}) (resp *http.Response, err error) {
|
|
|
|
msg, err := json.Marshal(data)
|
|
if err != nil {
|
|
return
|
|
}
|
|
return r.DoRequestWith(
|
|
ctx, method, url1, "application/json", bytes.NewReader(msg), len(msg))
|
|
}
|
|
|
|
func (r Client) Do(ctx Context, req *http.Request) (resp *http.Response, err error) {
|
|
|
|
if ctx == nil {
|
|
ctx = Background()
|
|
}
|
|
|
|
if reqid, ok := reqid.FromContext(ctx); ok {
|
|
req.Header.Set("X-Reqid", reqid)
|
|
}
|
|
|
|
if _, ok := req.Header["User-Agent"]; !ok {
|
|
req.Header.Set("User-Agent", UserAgent)
|
|
}
|
|
|
|
transport := r.Transport // don't change r.Transport
|
|
if transport == nil {
|
|
transport = http.DefaultTransport
|
|
}
|
|
|
|
// avoid cancel() is called before Do(req), but isn't accurate
|
|
select {
|
|
case <-ctx.Done():
|
|
err = ctx.Err()
|
|
return
|
|
default:
|
|
}
|
|
|
|
if tr, ok := getRequestCanceler(transport); ok { // support CancelRequest
|
|
reqC := make(chan bool, 1)
|
|
go func() {
|
|
resp, err = r.Client.Do(req)
|
|
reqC <- true
|
|
}()
|
|
select {
|
|
case <-reqC:
|
|
case <-ctx.Done():
|
|
tr.CancelRequest(req)
|
|
<-reqC
|
|
err = ctx.Err()
|
|
}
|
|
} else {
|
|
resp, err = r.Client.Do(req)
|
|
}
|
|
return
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
type ErrorInfo struct {
|
|
Err string `json:"error,omitempty"`
|
|
Key string `json:"key,omitempty"`
|
|
Reqid string `json:"reqid,omitempty"`
|
|
Errno int `json:"errno,omitempty"`
|
|
Code int `json:"code"`
|
|
}
|
|
|
|
func (r *ErrorInfo) ErrorDetail() string {
|
|
|
|
msg, _ := json.Marshal(r)
|
|
return string(msg)
|
|
}
|
|
|
|
func (r *ErrorInfo) Error() string {
|
|
|
|
return r.Err
|
|
}
|
|
|
|
func (r *ErrorInfo) RpcError() (code, errno int, key, err string) {
|
|
|
|
return r.Code, r.Errno, r.Key, r.Err
|
|
}
|
|
|
|
func (r *ErrorInfo) HttpCode() int {
|
|
|
|
return r.Code
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|
|
func parseError(e *ErrorInfo, r io.Reader) {
|
|
|
|
body, err1 := ioutil.ReadAll(r)
|
|
if err1 != nil {
|
|
e.Err = err1.Error()
|
|
return
|
|
}
|
|
|
|
var ret struct {
|
|
Err string `json:"error"`
|
|
Key string `json:"key"`
|
|
Errno int `json:"errno"`
|
|
}
|
|
if json.Unmarshal(body, &ret) == nil && ret.Err != "" {
|
|
// qiniu error msg style returns here
|
|
e.Err, e.Key, e.Errno = ret.Err, ret.Key, ret.Errno
|
|
return
|
|
}
|
|
e.Err = string(body)
|
|
}
|
|
|
|
func ResponseError(resp *http.Response) (err error) {
|
|
|
|
e := &ErrorInfo{
|
|
Reqid: resp.Header.Get("X-Reqid"),
|
|
Code: resp.StatusCode,
|
|
}
|
|
if resp.StatusCode > 299 {
|
|
if resp.ContentLength != 0 {
|
|
ct, ok := resp.Header["Content-Type"]
|
|
if ok && strings.HasPrefix(ct[0], "application/json") {
|
|
parseError(e, resp.Body)
|
|
}
|
|
}
|
|
}
|
|
return e
|
|
}
|
|
|
|
func CallRet(ctx Context, ret interface{}, resp *http.Response) (err error) {
|
|
|
|
defer func() {
|
|
io.Copy(ioutil.Discard, resp.Body)
|
|
resp.Body.Close()
|
|
}()
|
|
|
|
if resp.StatusCode/100 == 2 {
|
|
if ret != nil && resp.ContentLength != 0 {
|
|
err = json.NewDecoder(resp.Body).Decode(ret)
|
|
if err != nil {
|
|
return
|
|
}
|
|
}
|
|
if resp.StatusCode == 200 {
|
|
return nil
|
|
}
|
|
}
|
|
return ResponseError(resp)
|
|
}
|
|
|
|
func (r Client) CallWithForm(
|
|
ctx Context, ret interface{}, method, url1 string, param map[string][]string) (err error) {
|
|
|
|
resp, err := r.DoRequestWithForm(ctx, method, url1, param)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return CallRet(ctx, ret, resp)
|
|
}
|
|
|
|
func (r Client) CallWithJson(
|
|
ctx Context, ret interface{}, method, url1 string, param interface{}) (err error) {
|
|
|
|
resp, err := r.DoRequestWithJson(ctx, method, url1, param)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return CallRet(ctx, ret, resp)
|
|
}
|
|
|
|
func (r Client) CallWith(
|
|
ctx Context, ret interface{}, method, url1, bodyType string, body io.Reader, bodyLength int) (err error) {
|
|
|
|
resp, err := r.DoRequestWith(ctx, method, url1, bodyType, body, bodyLength)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return CallRet(ctx, ret, resp)
|
|
}
|
|
|
|
func (r Client) CallWith64(
|
|
ctx Context, ret interface{}, method, url1, bodyType string, body io.Reader, bodyLength int64) (err error) {
|
|
|
|
resp, err := r.DoRequestWith64(ctx, method, url1, bodyType, body, bodyLength)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return CallRet(ctx, ret, resp)
|
|
}
|
|
|
|
func (r Client) Call(
|
|
ctx Context, ret interface{}, method, url1 string) (err error) {
|
|
|
|
resp, err := r.DoRequestWith(ctx, method, url1, "application/x-www-form-urlencoded", nil, 0)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return CallRet(ctx, ret, resp)
|
|
}
|
|
|
|
// ---------------------------------------------------------------------------
|
|
|
|
type requestCanceler interface {
|
|
CancelRequest(req *http.Request)
|
|
}
|
|
|
|
type nestedObjectGetter interface {
|
|
NestedObject() interface{}
|
|
}
|
|
|
|
func getRequestCanceler(tp http.RoundTripper) (rc requestCanceler, ok bool) {
|
|
|
|
if rc, ok = tp.(requestCanceler); ok {
|
|
return
|
|
}
|
|
|
|
p := interface{}(tp)
|
|
for {
|
|
getter, ok1 := p.(nestedObjectGetter)
|
|
if !ok1 {
|
|
return
|
|
}
|
|
p = getter.NestedObject()
|
|
if rc, ok = p.(requestCanceler); ok {
|
|
return
|
|
}
|
|
}
|
|
}
|
|
|
|
// --------------------------------------------------------------------
|
|
|