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http.go
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http.go
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// Copyright 2019 Huawei Technologies Co.,Ltd.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use
// this file except in compliance with the License. You may obtain a copy of the
// License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed
// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
// CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
package obs
import (
"bytes"
"errors"
"fmt"
"io"
"math/rand"
"net"
"net/http"
"net/url"
"os"
"strings"
"time"
)
func prepareHeaders(headers map[string][]string, meta bool, isObs bool) map[string][]string {
_headers := make(map[string][]string, len(headers))
if headers != nil {
for key, value := range headers {
key = strings.TrimSpace(key)
if key == "" {
continue
}
_key := strings.ToLower(key)
if _, ok := allowedRequestHTTPHeaderMetadataNames[_key]; !ok && !strings.HasPrefix(key, HEADER_PREFIX) && !strings.HasPrefix(key, HEADER_PREFIX_OBS) {
if !meta {
continue
}
if !isObs {
_key = HEADER_PREFIX_META + _key
} else {
_key = HEADER_PREFIX_META_OBS + _key
}
} else {
_key = key
}
_headers[_key] = value
}
}
return _headers
}
func (obsClient ObsClient) doActionWithoutBucket(action, method string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
return obsClient.doAction(action, method, "", "", input, output, true, true, extensions)
}
func (obsClient ObsClient) doActionWithBucketV2(action, method, bucketName string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
return errors.New("Bucket is empty")
}
return obsClient.doAction(action, method, bucketName, "", input, output, false, true, extensions)
}
func (obsClient ObsClient) doActionWithBucket(action, method, bucketName string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
return errors.New("Bucket is empty")
}
return obsClient.doAction(action, method, bucketName, "", input, output, true, true, extensions)
}
func (obsClient ObsClient) doActionWithBucketAndKey(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
return obsClient._doActionWithBucketAndKey(action, method, bucketName, objectKey, input, output, true, extensions)
}
func (obsClient ObsClient) doActionWithBucketAndKeyV2(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
return errors.New("Bucket is empty")
}
if strings.TrimSpace(objectKey) == "" {
return errors.New("Key is empty")
}
return obsClient.doAction(action, method, bucketName, objectKey, input, output, false, true, extensions)
}
func (obsClient ObsClient) doActionWithBucketAndKeyUnRepeatable(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, extensions []extensionOptions) error {
return obsClient._doActionWithBucketAndKey(action, method, bucketName, objectKey, input, output, false, extensions)
}
func (obsClient ObsClient) _doActionWithBucketAndKey(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, repeatable bool, extensions []extensionOptions) error {
if strings.TrimSpace(bucketName) == "" && !obsClient.conf.cname {
return errors.New("Bucket is empty")
}
if strings.TrimSpace(objectKey) == "" {
return errors.New("Key is empty")
}
return obsClient.doAction(action, method, bucketName, objectKey, input, output, true, repeatable, extensions)
}
func (obsClient ObsClient) doAction(action, method, bucketName, objectKey string, input ISerializable, output IBaseModel, xmlResult bool, repeatable bool, extensions []extensionOptions) error {
var resp *http.Response
var respError error
doLog(LEVEL_INFO, "Enter method %s...", action)
start := GetCurrentTimestamp()
params, headers, data, err := input.trans(obsClient.conf.signature == SignatureObs)
if err != nil {
return err
}
if params == nil {
params = make(map[string]string)
}
if headers == nil {
headers = make(map[string][]string)
}
for _, extension := range extensions {
if extensionHeader, ok := extension.(extensionHeaders); ok {
_err := extensionHeader(headers, obsClient.conf.signature == SignatureObs)
if _err != nil {
doLog(LEVEL_INFO, fmt.Sprintf("set header with error: %v", _err))
}
} else {
doLog(LEVEL_INFO, "Unsupported extensionOptions")
}
}
switch method {
case HTTP_GET:
resp, respError = obsClient.doHTTPGet(bucketName, objectKey, params, headers, data, repeatable)
case HTTP_POST:
resp, respError = obsClient.doHTTPPost(bucketName, objectKey, params, headers, data, repeatable)
case HTTP_PUT:
resp, respError = obsClient.doHTTPPut(bucketName, objectKey, params, headers, data, repeatable)
case HTTP_DELETE:
resp, respError = obsClient.doHTTPDelete(bucketName, objectKey, params, headers, data, repeatable)
case HTTP_HEAD:
resp, respError = obsClient.doHTTPHead(bucketName, objectKey, params, headers, data, repeatable)
case HTTP_OPTIONS:
resp, respError = obsClient.doHTTPOptions(bucketName, objectKey, params, headers, data, repeatable)
default:
respError = errors.New("Unexpect http method error")
}
if respError == nil && output != nil {
respError = ParseResponseToBaseModel(resp, output, xmlResult, obsClient.conf.signature == SignatureObs)
if respError != nil {
doLog(LEVEL_WARN, "Parse response to BaseModel with error: %v", respError)
}
} else {
doLog(LEVEL_WARN, "Do http request with error: %v", respError)
}
if isDebugLogEnabled() {
doLog(LEVEL_DEBUG, "End method %s, obsclient cost %d ms", action, (GetCurrentTimestamp() - start))
}
return respError
}
func (obsClient ObsClient) doHTTPGet(bucketName, objectKey string, params map[string]string,
headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
return obsClient.doHTTP(HTTP_GET, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
}
func (obsClient ObsClient) doHTTPHead(bucketName, objectKey string, params map[string]string,
headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
return obsClient.doHTTP(HTTP_HEAD, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
}
func (obsClient ObsClient) doHTTPOptions(bucketName, objectKey string, params map[string]string,
headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
return obsClient.doHTTP(HTTP_OPTIONS, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
}
func (obsClient ObsClient) doHTTPDelete(bucketName, objectKey string, params map[string]string,
headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
return obsClient.doHTTP(HTTP_DELETE, bucketName, objectKey, params, prepareHeaders(headers, false, obsClient.conf.signature == SignatureObs), data, repeatable)
}
func (obsClient ObsClient) doHTTPPut(bucketName, objectKey string, params map[string]string,
headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
return obsClient.doHTTP(HTTP_PUT, bucketName, objectKey, params, prepareHeaders(headers, true, obsClient.conf.signature == SignatureObs), data, repeatable)
}
func (obsClient ObsClient) doHTTPPost(bucketName, objectKey string, params map[string]string,
headers map[string][]string, data interface{}, repeatable bool) (*http.Response, error) {
return obsClient.doHTTP(HTTP_POST, bucketName, objectKey, params, prepareHeaders(headers, true, obsClient.conf.signature == SignatureObs), data, repeatable)
}
func prepareAgentHeader(clientUserAgent string) string {
userAgent := USER_AGENT
if clientUserAgent != "" {
userAgent = clientUserAgent
}
return userAgent
}
func (obsClient ObsClient) getSignedURLResponse(action string, output IBaseModel, xmlResult bool, resp *http.Response, err error, start int64) (respError error) {
var msg interface{}
if err != nil {
respError = err
resp = nil
} else {
doLog(LEVEL_DEBUG, "Response headers: %v", resp.Header)
if resp.StatusCode >= 300 {
respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
msg = resp.Status
resp = nil
} else {
if output != nil {
respError = ParseResponseToBaseModel(resp, output, xmlResult, obsClient.conf.signature == SignatureObs)
}
if respError != nil {
doLog(LEVEL_WARN, "Parse response to BaseModel with error: %v", respError)
}
}
}
if msg != nil {
doLog(LEVEL_ERROR, "Failed to send request with reason:%v", msg)
}
if isDebugLogEnabled() {
doLog(LEVEL_DEBUG, "End method %s, obsclient cost %d ms", action, (GetCurrentTimestamp() - start))
}
return
}
func (obsClient ObsClient) doHTTPWithSignedURL(action, method string, signedURL string, actualSignedRequestHeaders http.Header, data io.Reader, output IBaseModel, xmlResult bool) (respError error) {
req, err := http.NewRequest(method, signedURL, data)
if err != nil {
return err
}
if obsClient.conf.ctx != nil {
req = req.WithContext(obsClient.conf.ctx)
}
var resp *http.Response
var isSecurityToken bool
var securityToken string
var query []string
parmas := strings.Split(signedURL, "?")
if len(parmas) > 1 {
query = strings.Split(parmas[1], "&")
for _, value := range query {
if strings.HasPrefix(value, HEADER_STS_TOKEN_AMZ+"=") || strings.HasPrefix(value, HEADER_STS_TOKEN_OBS+"=") {
if value[len(HEADER_STS_TOKEN_AMZ)+1:] != "" {
securityToken = value[len(HEADER_STS_TOKEN_AMZ)+1:]
isSecurityToken = true
}
}
}
}
logSignedURL := signedURL
if isSecurityToken {
logSignedURL = strings.Replace(logSignedURL, securityToken, "******", -1)
}
doLog(LEVEL_INFO, "Do %s with signedUrl %s...", action, logSignedURL)
req.Header = actualSignedRequestHeaders
if value, ok := req.Header[HEADER_HOST_CAMEL]; ok {
req.Host = value[0]
delete(req.Header, HEADER_HOST_CAMEL)
} else if value, ok := req.Header[HEADER_HOST]; ok {
req.Host = value[0]
delete(req.Header, HEADER_HOST)
}
if value, ok := req.Header[HEADER_CONTENT_LENGTH_CAMEL]; ok {
req.ContentLength = StringToInt64(value[0], -1)
delete(req.Header, HEADER_CONTENT_LENGTH_CAMEL)
} else if value, ok := req.Header[HEADER_CONTENT_LENGTH]; ok {
req.ContentLength = StringToInt64(value[0], -1)
delete(req.Header, HEADER_CONTENT_LENGTH)
}
userAgent := prepareAgentHeader(obsClient.conf.userAgent)
req.Header[HEADER_USER_AGENT_CAMEL] = []string{userAgent}
start := GetCurrentTimestamp()
resp, err = obsClient.httpClient.Do(req)
if isInfoLogEnabled() {
doLog(LEVEL_INFO, "Do http request cost %d ms", (GetCurrentTimestamp() - start))
}
respError = obsClient.getSignedURLResponse(action, output, xmlResult, resp, err, start)
return
}
func prepareData(headers map[string][]string, data interface{}) (io.Reader, error) {
var _data io.Reader
if data != nil {
if dataStr, ok := data.(string); ok {
doLog(LEVEL_DEBUG, "Do http request with string: %s", dataStr)
headers["Content-Length"] = []string{IntToString(len(dataStr))}
_data = strings.NewReader(dataStr)
} else if dataByte, ok := data.([]byte); ok {
doLog(LEVEL_DEBUG, "Do http request with byte array")
headers["Content-Length"] = []string{IntToString(len(dataByte))}
_data = bytes.NewReader(dataByte)
} else if dataReader, ok := data.(io.Reader); ok {
_data = dataReader
} else {
doLog(LEVEL_WARN, "Data is not a valid io.Reader")
return nil, errors.New("Data is not a valid io.Reader")
}
}
return _data, nil
}
func (obsClient ObsClient) getRequest(redirectURL, requestURL string, redirectFlag bool, _data io.Reader, method,
bucketName, objectKey string, params map[string]string, headers map[string][]string) (*http.Request, error) {
if redirectURL != "" {
if !redirectFlag {
parsedRedirectURL, err := url.Parse(redirectURL)
if err != nil {
return nil, err
}
requestURL, err = obsClient.doAuth(method, bucketName, objectKey, params, headers, parsedRedirectURL.Host)
if err != nil {
return nil, err
}
if parsedRequestURL, err := url.Parse(requestURL); err != nil {
return nil, err
} else if parsedRequestURL.RawQuery != "" && parsedRedirectURL.RawQuery == "" {
redirectURL += "?" + parsedRequestURL.RawQuery
}
}
requestURL = redirectURL
} else {
var err error
requestURL, err = obsClient.doAuth(method, bucketName, objectKey, params, headers, "")
if err != nil {
return nil, err
}
}
req, err := http.NewRequest(method, requestURL, _data)
if obsClient.conf.ctx != nil {
req = req.WithContext(obsClient.conf.ctx)
}
if err != nil {
return nil, err
}
doLog(LEVEL_DEBUG, "Do request with url [%s] and method [%s]", requestURL, method)
return req, nil
}
func logHeaders(headers map[string][]string, signature SignatureType) {
if isDebugLogEnabled() {
auth := headers[HEADER_AUTH_CAMEL]
delete(headers, HEADER_AUTH_CAMEL)
var isSecurityToken bool
var securityToken []string
if securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_AMZ]; isSecurityToken {
headers[HEADER_STS_TOKEN_AMZ] = []string{"******"}
} else if securityToken, isSecurityToken = headers[HEADER_STS_TOKEN_OBS]; isSecurityToken {
headers[HEADER_STS_TOKEN_OBS] = []string{"******"}
}
doLog(LEVEL_DEBUG, "Request headers: %v", headers)
headers[HEADER_AUTH_CAMEL] = auth
if isSecurityToken {
if signature == SignatureObs {
headers[HEADER_STS_TOKEN_OBS] = securityToken
} else {
headers[HEADER_STS_TOKEN_AMZ] = securityToken
}
}
}
}
func prepareReq(headers map[string][]string, req, lastRequest *http.Request, clientUserAgent string) *http.Request {
for key, value := range headers {
if key == HEADER_HOST_CAMEL {
req.Host = value[0]
delete(headers, key)
} else if key == HEADER_CONTENT_LENGTH_CAMEL {
req.ContentLength = StringToInt64(value[0], -1)
delete(headers, key)
} else {
req.Header[key] = value
}
}
lastRequest = req
userAgent := prepareAgentHeader(clientUserAgent)
req.Header[HEADER_USER_AGENT_CAMEL] = []string{userAgent}
if lastRequest != nil {
req.Host = lastRequest.Host
req.ContentLength = lastRequest.ContentLength
}
return lastRequest
}
func canNotRetry(repeatable bool, statusCode int) bool {
if !repeatable || (statusCode >= 400 && statusCode < 500) || statusCode == 304 {
return true
}
return false
}
func isRedirectErr(location string, redirectCount, maxRedirectCount int) bool {
if location != "" && redirectCount < maxRedirectCount {
return true
}
return false
}
func setRedirectFlag(statusCode int, method string) (redirectFlag bool) {
if statusCode == 302 && method == HTTP_GET {
redirectFlag = true
} else {
redirectFlag = false
}
return
}
func prepareRetry(resp *http.Response, headers map[string][]string, _data io.Reader, msg interface{}) (io.Reader, *http.Response, error) {
if resp != nil {
_err := resp.Body.Close()
checkAndLogErr(_err, LEVEL_WARN, "Failed to close resp body")
resp = nil
}
if _, ok := headers[HEADER_AUTH_CAMEL]; ok {
delete(headers, HEADER_AUTH_CAMEL)
}
doLog(LEVEL_WARN, "Failed to send request with reason:%v, will try again", msg)
if r, ok := _data.(*strings.Reader); ok {
_, err := r.Seek(0, 0)
if err != nil {
return nil, nil, err
}
} else if r, ok := _data.(*bytes.Reader); ok {
_, err := r.Seek(0, 0)
if err != nil {
return nil, nil, err
}
} else if r, ok := _data.(*fileReaderWrapper); ok {
fd, err := os.Open(r.filePath)
if err != nil {
return nil, nil, err
}
fileReaderWrapper := &fileReaderWrapper{filePath: r.filePath}
fileReaderWrapper.mark = r.mark
fileReaderWrapper.reader = fd
fileReaderWrapper.totalCount = r.totalCount
_data = fileReaderWrapper
_, err = fd.Seek(r.mark, 0)
if err != nil {
errMsg := fd.Close()
checkAndLogErr(errMsg, LEVEL_WARN, "Failed to close with reason: %v", errMsg)
return nil, nil, err
}
} else if r, ok := _data.(*readerWrapper); ok {
_, err := r.seek(0, 0)
if err != nil {
return nil, nil, err
}
r.readedCount = 0
}
return _data, resp, nil
}
func (obsClient ObsClient) doHTTP(method, bucketName, objectKey string, params map[string]string,
headers map[string][]string, data interface{}, repeatable bool) (resp *http.Response, respError error) {
bucketName = strings.TrimSpace(bucketName)
method = strings.ToUpper(method)
var redirectURL string
var requestURL string
maxRetryCount := obsClient.conf.maxRetryCount
maxRedirectCount := obsClient.conf.maxRedirectCount
_data, _err := prepareData(headers, data)
if _err != nil {
return nil, _err
}
var lastRequest *http.Request
redirectFlag := false
for i, redirectCount := 0, 0; i <= maxRetryCount; i++ {
req, err := obsClient.getRequest(redirectURL, requestURL, redirectFlag, _data,
method, bucketName, objectKey, params, headers)
if err != nil {
return nil, err
}
logHeaders(headers, obsClient.conf.signature)
lastRequest = prepareReq(headers, req, lastRequest, obsClient.conf.userAgent)
start := GetCurrentTimestamp()
resp, err = obsClient.httpClient.Do(req)
doLog(LEVEL_INFO, "Do http request cost %d ms", (GetCurrentTimestamp() - start))
var msg interface{}
if err != nil {
msg = err
respError = err
resp = nil
if !repeatable {
break
}
} else {
doLog(LEVEL_DEBUG, "Response headers: %v", resp.Header)
if resp.StatusCode < 300 {
respError = nil
break
} else if canNotRetry(repeatable, resp.StatusCode) {
respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
resp = nil
break
} else if resp.StatusCode >= 300 && resp.StatusCode < 400 {
location := resp.Header.Get(HEADER_LOCATION_CAMEL)
if isRedirectErr(location, redirectCount, maxRedirectCount) {
redirectURL = location
doLog(LEVEL_WARN, "Redirect request to %s", redirectURL)
msg = resp.Status
maxRetryCount++
redirectCount++
redirectFlag = setRedirectFlag(resp.StatusCode, method)
} else {
respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
resp = nil
break
}
} else {
msg = resp.Status
}
}
if i != maxRetryCount {
_data, resp, err = prepareRetry(resp, headers, _data, msg)
if err != nil {
return nil, err
}
if r, ok := _data.(*fileReaderWrapper); ok {
if _fd, _ok := r.reader.(*os.File); _ok {
defer func() {
errMsg := _fd.Close()
checkAndLogErr(errMsg, LEVEL_WARN, "Failed to close with reason: %v", errMsg)
}()
}
}
time.Sleep(time.Duration(float64(i+2) * rand.Float64() * float64(time.Second)))
} else {
doLog(LEVEL_ERROR, "Failed to send request with reason:%v", msg)
if resp != nil {
respError = ParseResponseToObsError(resp, obsClient.conf.signature == SignatureObs)
resp = nil
}
}
}
return
}
type connDelegate struct {
conn net.Conn
socketTimeout time.Duration
finalTimeout time.Duration
}
func getConnDelegate(conn net.Conn, socketTimeout int, finalTimeout int) *connDelegate {
return &connDelegate{
conn: conn,
socketTimeout: time.Second * time.Duration(socketTimeout),
finalTimeout: time.Second * time.Duration(finalTimeout),
}
}
func (delegate *connDelegate) Read(b []byte) (n int, err error) {
setReadDeadlineErr := delegate.SetReadDeadline(time.Now().Add(delegate.socketTimeout))
flag := isDebugLogEnabled()
if setReadDeadlineErr != nil && flag {
doLog(LEVEL_DEBUG, "Failed to set read deadline with reason: %v, but it's ok", setReadDeadlineErr)
}
n, err = delegate.conn.Read(b)
setReadDeadlineErr = delegate.SetReadDeadline(time.Now().Add(delegate.finalTimeout))
if setReadDeadlineErr != nil && flag {
doLog(LEVEL_DEBUG, "Failed to set read deadline with reason: %v, but it's ok", setReadDeadlineErr)
}
return n, err
}
func (delegate *connDelegate) Write(b []byte) (n int, err error) {
setWriteDeadlineErr := delegate.SetWriteDeadline(time.Now().Add(delegate.socketTimeout))
flag := isDebugLogEnabled()
if setWriteDeadlineErr != nil && flag {
doLog(LEVEL_DEBUG, "Failed to set write deadline with reason: %v, but it's ok", setWriteDeadlineErr)
}
n, err = delegate.conn.Write(b)
finalTimeout := time.Now().Add(delegate.finalTimeout)
setWriteDeadlineErr = delegate.SetWriteDeadline(finalTimeout)
if setWriteDeadlineErr != nil && flag {
doLog(LEVEL_DEBUG, "Failed to set write deadline with reason: %v, but it's ok", setWriteDeadlineErr)
}
setReadDeadlineErr := delegate.SetReadDeadline(finalTimeout)
if setReadDeadlineErr != nil && flag {
doLog(LEVEL_DEBUG, "Failed to set read deadline with reason: %v, but it's ok", setReadDeadlineErr)
}
return n, err
}
func (delegate *connDelegate) Close() error {
return delegate.conn.Close()
}
func (delegate *connDelegate) LocalAddr() net.Addr {
return delegate.conn.LocalAddr()
}
func (delegate *connDelegate) RemoteAddr() net.Addr {
return delegate.conn.RemoteAddr()
}
func (delegate *connDelegate) SetDeadline(t time.Time) error {
return delegate.conn.SetDeadline(t)
}
func (delegate *connDelegate) SetReadDeadline(t time.Time) error {
return delegate.conn.SetReadDeadline(t)
}
func (delegate *connDelegate) SetWriteDeadline(t time.Time) error {
return delegate.conn.SetWriteDeadline(t)
}