Update go dependencies

vendor/github.com/Azure/go-autorest/.travis.yml

@@ -4,6 +4,7 @@ language: go
 
 go:
   - master
+  - 1.11.x
   - 1.10.x
   - 1.9.x
   - 1.8.x
@@ -13,7 +14,7 @@ matrix:
     - go: master
 
 env:
-  - DEP_VERSION="0.4.1"
+  - DEP_VERSION="0.5.0"
 
 before_install:
   - curl -L -o $GOPATH/bin/dep https://github.com/golang/dep/releases/download/v$DEP_VERSION/dep-linux-amd64 && chmod +x $GOPATH/bin/dep
@@ -26,7 +27,7 @@ install:
 
 script:
   - grep -L -r --include *.go --exclude-dir vendor -P "Copyright (\d{4}|\(c\)) Microsoft" ./ | tee /dev/stderr | test -z "$(< /dev/stdin)"
-  - test -z "$(gofmt -s -l -w ./autorest/. | tee /dev/stderr)"
+  - if [[ $TRAVIS_GO_VERSION == 1.11* ]]; then test -z "$(gofmt -s -l -w ./autorest/. | tee /dev/stderr)"; fi
   - test -z "$(golint ./autorest/... |  tee /dev/stderr)"
   - go vet ./autorest/...
   - test -z "$(gas ./autorest/... | tee /dev/stderr | grep Error)"

vendor/github.com/Azure/go-autorest/CHANGELOG.md

@@ -1,5 +1,57 @@
 # CHANGELOG
 
+## v10.15.4
+
+### Bug Fixes
+
+- If a polling operation returns a failure status code return the associated error.
+
+## v10.15.3
+
+### Bug Fixes
+
+- Initialize the polling URL and method for an LRO tracker on each iteration, favoring the Azure-AsyncOperation header.
+
+## v10.15.2
+
+### Bug Fixes
+
+- Use fmt.Fprint when printing request/response so that any escape sequences aren't treated as format specifiers.
+
+## v10.15.1
+
+### Bug Fixes
+
+- If an LRO API returns a ```Failed``` provisioning state in the initial response return an error at that point so the caller doesn't have to poll.
+- For failed LROs without an OData v4 error include the response body in the error's ```AdditionalInfo``` field to aid in diagnosing the failure.
+
+## v10.15.0
+
+### New Features
+
+- Add initial support for request/response logging via setting environment variables.
+  Setting ```AZURE_GO_SDK_LOG_LEVEL``` to ```LogInfo``` will log request/response
+  without their bodies.  To include the bodies set the log level to ```LogDebug```.
+  By default the logger writes to strerr, however it can also write to stdout or a file
+  if specified in ```AZURE_GO_SDK_LOG_FILE```.  Note that if the specified file
+  already exists it will be truncated.
+  IMPORTANT: by default the logger will redact the Authorization and Ocp-Apim-Subscription-Key
+  headers.  Any other secrets will *not* be redacted.
+
+## v10.14.0
+
+### New Features
+
+- Added package version that contains version constants and user-agent data.
+
+### Bug Fixes
+
+- Add the user-agent to token requests.
+
+## v10.13.0
+
+- Added support for additionalInfo in ServiceError type.
+
 ## v10.12.0
 
 ### New Features

vendor/github.com/Azure/go-autorest/Gopkg.lock

@@ -2,50 +2,76 @@
 
 
 [[projects]]
+  digest = "1:0deddd908b6b4b768cfc272c16ee61e7088a60f7fe2f06c547bd3d8e1f8b8e77"
   name = "github.com/davecgh/go-spew"
   packages = ["spew"]
-  revision = "346938d642f2ec3594ed81d874461961cd0faa76"
-  version = "v1.1.0"
+  pruneopts = ""
+  revision = "8991bc29aa16c548c550c7ff78260e27b9ab7c73"
+  version = "v1.1.1"
 
 [[projects]]
+  digest = "1:6098222470fe0172157ce9bbef5d2200df4edde17ee649c5d6e48330e4afa4c6"
   name = "github.com/dgrijalva/jwt-go"
   packages = ["."]
-  revision = "dbeaa9332f19a944acb5736b4456cfcc02140e29"
-  version = "v3.1.0"
+  pruneopts = ""
+  revision = "06ea1031745cb8b3dab3f6a236daf2b0aa468b7e"
+  version = "v3.2.0"
 
 [[projects]]
   branch = "master"
+  digest = "1:7f175a633086a933d1940a7e7dc2154a0070a7c25fb4a2f671f3eef1a34d1fd7"
   name = "github.com/dimchansky/utfbom"
   packages = ["."]
-  revision = "6c6132ff69f0f6c088739067407b5d32c52e1d0f"
+  pruneopts = ""
+  revision = "5448fe645cb1964ba70ac8f9f2ffe975e61a536c"
 
 [[projects]]
   branch = "master"
+  digest = "1:096a8a9182648da3d00ff243b88407838902b6703fc12657f76890e08d1899bf"
   name = "github.com/mitchellh/go-homedir"
   packages = ["."]
-  revision = "b8bc1bf767474819792c23f32d8286a45736f1c6"
+  pruneopts = ""
+  revision = "ae18d6b8b3205b561c79e8e5f69bff09736185f4"
 
 [[projects]]
+  digest = "1:256484dbbcd271f9ecebc6795b2df8cad4c458dd0f5fd82a8c2fa0c29f233411"
   name = "github.com/pmezard/go-difflib"
   packages = ["difflib"]
+  pruneopts = ""
   revision = "792786c7400a136282c1664665ae0a8db921c6c2"
   version = "v1.0.0"
 
 [[projects]]
+  digest = "1:c587772fb8ad29ad4db67575dad25ba17a51f072ff18a22b4f0257a4d9c24f75"
   name = "github.com/stretchr/testify"
-  packages = ["assert","require"]
-  revision = "b91bfb9ebec76498946beb6af7c0230c7cc7ba6c"
-  version = "v1.2.0"
+  packages = [
+    "assert",
+    "require",
+  ]
+  pruneopts = ""
+  revision = "f35b8ab0b5a2cef36673838d662e249dd9c94686"
+  version = "v1.2.2"
 
 [[projects]]
   branch = "master"
+  digest = "1:793a79198b755828dec284c6f1325e24e09186f1b7ba818b65c7c35104ed86eb"
   name = "golang.org/x/crypto"
-  packages = ["pkcs12","pkcs12/internal/rc2"]
-  revision = "5f55bce93ad2c89f411e009659bb1fd83da36e7b"
+  packages = [
+    "pkcs12",
+    "pkcs12/internal/rc2",
+  ]
+  pruneopts = ""
+  revision = "614d502a4dac94afa3a6ce146bd1736da82514c6"
 
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "ffeca2a12692c1c74addbf6ce6c2671e8d1a9fc5b6f5aaeee09da65eb48e8251"
+  input-imports = [
+    "github.com/dgrijalva/jwt-go",
+    "github.com/dimchansky/utfbom",
+    "github.com/mitchellh/go-homedir",
+    "github.com/stretchr/testify/require",
+    "golang.org/x/crypto/pkcs12",
+  ]
   solver-name = "gps-cdcl"
   solver-version = 1

vendor/github.com/Azure/go-autorest/autorest/adal/token.go

@@ -35,6 +35,7 @@ import (
 	"time"
 
 	"github.com/Azure/go-autorest/autorest/date"
+	"github.com/Azure/go-autorest/version"
 	"github.com/dgrijalva/jwt-go"
 )
 
@@ -778,6 +779,7 @@ func (spt *ServicePrincipalToken) refreshInternal(ctx context.Context, resource
 	if err != nil {
 		return fmt.Errorf("adal: Failed to build the refresh request. Error = '%v'", err)
 	}
+	req.Header.Add("User-Agent", version.UserAgent())
 	req = req.WithContext(ctx)
 	if !isIMDS(spt.inner.OauthConfig.TokenEndpoint) {
 		v := url.Values{}

vendor/github.com/Azure/go-autorest/autorest/azure/async.go

@@ -119,7 +119,10 @@ func (f *Future) Done(sender autorest.Sender) (bool, error) {
 	if err := f.pt.updatePollingState(f.pt.provisioningStateApplicable()); err != nil {
 		return false, err
 	}
-	if err := f.pt.updateHeaders(); err != nil {
+	if err := f.pt.initPollingMethod(); err != nil {
+		return false, err
+	}
+	if err := f.pt.updatePollingMethod(); err != nil {
 		return false, err
 	}
 	return f.pt.hasTerminated(), f.pt.pollingError()
@@ -264,7 +267,7 @@ type pollingTracker interface {
 	// these methods can differ per tracker
 
 	// checks the response headers and status code to determine the polling mechanism
-	updateHeaders() error
+	updatePollingMethod() error
 
 	// checks the response for tracker-specific error conditions
 	checkForErrors() error
@@ -274,6 +277,10 @@ type pollingTracker interface {
 
 	// methods common to all trackers
 
+	// initializes a tracker's polling URL and method, called for each iteration.
+	// these values can be overridden by each polling tracker as required.
+	initPollingMethod() error
+
 	// initializes the tracker's internal state, call this when the tracker is created
 	initializeState() error
 
@@ -348,6 +355,10 @@ func (pt *pollingTrackerBase) initializeState() error {
 	case http.StatusOK:
 		if ps := pt.getProvisioningState(); ps != nil {
 			pt.State = *ps
+			if pt.hasFailed() {
+				pt.updateErrorFromResponse()
+				return pt.pollingError()
+			}
 		} else {
 			pt.State = operationSucceeded
 		}
@@ -364,8 +375,9 @@ func (pt *pollingTrackerBase) initializeState() error {
 	default:
 		pt.State = operationFailed
 		pt.updateErrorFromResponse()
+		return pt.pollingError()
 	}
-	return nil
+	return pt.initPollingMethod()
 }
 
 func (pt pollingTrackerBase) getProvisioningState() *string {
@@ -416,12 +428,14 @@ func (pt *pollingTrackerBase) pollForStatus(sender autorest.Sender) error {
 	} else {
 		// check response body for error content
 		pt.updateErrorFromResponse()
+		err = pt.pollingError()
 	}
 	return err
 }
 
 // attempts to unmarshal a ServiceError type from the response body.
 // if that fails then make a best attempt at creating something meaningful.
+// NOTE: this assumes that the async operation has failed.
 func (pt *pollingTrackerBase) updateErrorFromResponse() {
 	var err error
 	if pt.resp.ContentLength != 0 {
@@ -431,8 +445,7 @@ func (pt *pollingTrackerBase) updateErrorFromResponse() {
 		re := respErr{}
 		defer pt.resp.Body.Close()
 		var b []byte
-		b, err = ioutil.ReadAll(pt.resp.Body)
-		if err != nil {
+		if b, err = ioutil.ReadAll(pt.resp.Body); err != nil {
 			goto Default
 		}
 		if err = json.Unmarshal(b, &re); err != nil {
@@ -445,20 +458,29 @@ func (pt *pollingTrackerBase) updateErrorFromResponse() {
 				goto Default
 			}
 		}
-		if re.ServiceError != nil {
+		// the unmarshaller will ensure re.ServiceError is non-nil
+		// even if there was no content unmarshalled so check the code.
+		if re.ServiceError.Code != "" {
 			pt.Err = re.ServiceError
 			return
 		}
 	}
 Default:
 	se := &ServiceError{
-		Code:    fmt.Sprintf("HTTP status code %v", pt.resp.StatusCode),
-		Message: pt.resp.Status,
+		Code:    pt.pollingStatus(),
+		Message: "The async operation failed.",
 	}
 	if err != nil {
 		se.InnerError = make(map[string]interface{})
 		se.InnerError["unmarshalError"] = err.Error()
 	}
+	// stick the response body into the error object in hopes
+	// it contains something useful to help diagnose the failure.
+	if len(pt.rawBody) > 0 {
+		se.AdditionalInfo = []map[string]interface{}{
+			pt.rawBody,
+		}
+	}
 	pt.Err = se
 }
 
@@ -538,13 +560,33 @@ func (pt pollingTrackerBase) baseCheckForErrors() error {
 	return nil
 }
 
+// default initialization of polling URL/method.  each verb tracker will update this as required.
+func (pt *pollingTrackerBase) initPollingMethod() error {
+	if ao, err := getURLFromAsyncOpHeader(pt.resp); err != nil {
+		return err
+	} else if ao != "" {
+		pt.URI = ao
+		pt.Pm = PollingAsyncOperation
+		return nil
+	}
+	if lh, err := getURLFromLocationHeader(pt.resp); err != nil {
+		return err
+	} else if lh != "" {
+		pt.URI = lh
+		pt.Pm = PollingLocation
+		return nil
+	}
+	// it's ok if we didn't find a polling header, this will be handled elsewhere
+	return nil
+}
+
 // DELETE
 
 type pollingTrackerDelete struct {
 	pollingTrackerBase
 }
 
-func (pt *pollingTrackerDelete) updateHeaders() error {
+func (pt *pollingTrackerDelete) updatePollingMethod() error {
 	// for 201 the Location header is required
 	if pt.resp.StatusCode == http.StatusCreated {
 		if lh, err := getURLFromLocationHeader(pt.resp); err != nil {
@@ -600,7 +642,7 @@ type pollingTrackerPatch struct {
 	pollingTrackerBase
 }
 
-func (pt *pollingTrackerPatch) updateHeaders() error {
+func (pt *pollingTrackerPatch) updatePollingMethod() error {
 	// by default we can use the original URL for polling and final GET
 	if pt.URI == "" {
 		pt.URI = pt.resp.Request.URL.String()
@@ -658,7 +700,7 @@ type pollingTrackerPost struct {
 	pollingTrackerBase
 }
 
-func (pt *pollingTrackerPost) updateHeaders() error {
+func (pt *pollingTrackerPost) updatePollingMethod() error {
 	// 201 requires Location header
 	if pt.resp.StatusCode == http.StatusCreated {
 		if lh, err := getURLFromLocationHeader(pt.resp); err != nil {
@@ -714,7 +756,7 @@ type pollingTrackerPut struct {
 	pollingTrackerBase
 }
 
-func (pt *pollingTrackerPut) updateHeaders() error {
+func (pt *pollingTrackerPut) updatePollingMethod() error {
 	// by default we can use the original URL for polling and final GET
 	if pt.URI == "" {
 		pt.URI = pt.resp.Request.URL.String()
@@ -808,7 +850,7 @@ func createPollingTracker(resp *http.Response) (pollingTracker, error) {
 	// this initializes the polling header values, we do this during creation in case the
 	// initial response send us invalid values; this way the API call will return a non-nil
 	// error (not doing this means the error shows up in Future.Done)
-	return pt, pt.updateHeaders()
+	return pt, pt.updatePollingMethod()
 }
 
 // gets the polling URL from the Azure-AsyncOperation header.

vendor/github.com/Azure/go-autorest/autorest/azure/azure.go

@@ -44,11 +44,12 @@ const (
 // ServiceError encapsulates the error response from an Azure service.
 // It adhears to the OData v4 specification for error responses.
 type ServiceError struct {
-	Code       string                   `json:"code"`
-	Message    string                   `json:"message"`
-	Target     *string                  `json:"target"`
-	Details    []map[string]interface{} `json:"details"`
-	InnerError map[string]interface{}   `json:"innererror"`
+	Code           string                   `json:"code"`
+	Message        string                   `json:"message"`
+	Target         *string                  `json:"target"`
+	Details        []map[string]interface{} `json:"details"`
+	InnerError     map[string]interface{}   `json:"innererror"`
+	AdditionalInfo []map[string]interface{} `json:"additionalInfo"`
 }
 
 func (se ServiceError) Error() string {
@@ -74,6 +75,14 @@ func (se ServiceError) Error() string {
 		result += fmt.Sprintf(" InnerError=%v", string(d))
 	}
 
+	if se.AdditionalInfo != nil {
+		d, err := json.Marshal(se.AdditionalInfo)
+		if err != nil {
+			result += fmt.Sprintf(" AdditionalInfo=%v", se.AdditionalInfo)
+		}
+		result += fmt.Sprintf(" AdditionalInfo=%v", string(d))
+	}
+
 	return result
 }
 
@@ -86,44 +95,47 @@ func (se *ServiceError) UnmarshalJSON(b []byte) error {
 	// http://docs.oasis-open.org/odata/odata-json-format/v4.0/os/odata-json-format-v4.0-os.html#_Toc372793091
 
 	type serviceError1 struct {
-		Code       string                   `json:"code"`
-		Message    string                   `json:"message"`
-		Target     *string                  `json:"target"`
-		Details    []map[string]interface{} `json:"details"`
-		InnerError map[string]interface{}   `json:"innererror"`
+		Code           string                   `json:"code"`
+		Message        string                   `json:"message"`
+		Target         *string                  `json:"target"`
+		Details        []map[string]interface{} `json:"details"`
+		InnerError     map[string]interface{}   `json:"innererror"`
+		AdditionalInfo []map[string]interface{} `json:"additionalInfo"`
 	}
 
 	type serviceError2 struct {
-		Code       string                 `json:"code"`
-		Message    string                 `json:"message"`
-		Target     *string                `json:"target"`
-		Details    map[string]interface{} `json:"details"`
-		InnerError map[string]interface{} `json:"innererror"`
+		Code           string                   `json:"code"`
+		Message        string                   `json:"message"`
+		Target         *string                  `json:"target"`
+		Details        map[string]interface{}   `json:"details"`
+		InnerError     map[string]interface{}   `json:"innererror"`
+		AdditionalInfo []map[string]interface{} `json:"additionalInfo"`
 	}
 
 	se1 := serviceError1{}
 	err := json.Unmarshal(b, &se1)
 	if err == nil {
-		se.populate(se1.Code, se1.Message, se1.Target, se1.Details, se1.InnerError)
+		se.populate(se1.Code, se1.Message, se1.Target, se1.Details, se1.InnerError, se1.AdditionalInfo)
 		return nil
 	}
 
 	se2 := serviceError2{}
 	err = json.Unmarshal(b, &se2)
 	if err == nil {
-		se.populate(se2.Code, se2.Message, se2.Target, nil, se2.InnerError)
+		se.populate(se2.Code, se2.Message, se2.Target, nil, se2.InnerError, se2.AdditionalInfo)
 		se.Details = append(se.Details, se2.Details)
 		return nil
 	}
 	return err
 }
 
-func (se *ServiceError) populate(code, message string, target *string, details []map[string]interface{}, inner map[string]interface{}) {
+func (se *ServiceError) populate(code, message string, target *string, details []map[string]interface{}, inner map[string]interface{}, additional []map[string]interface{}) {
 	se.Code = code
 	se.Message = message
 	se.Target = target
 	se.Details = details
 	se.InnerError = inner
+	se.AdditionalInfo = additional
 }
 
 // RequestError describes an error response returned by Azure service.

vendor/github.com/Azure/go-autorest/autorest/client.go

@@ -22,8 +22,11 @@ import (
 	"log"
 	"net/http"
 	"net/http/cookiejar"
-	"runtime"
+	"strings"
 	"time"
+
+	"github.com/Azure/go-autorest/logger"
+	"github.com/Azure/go-autorest/version"
 )
 
 const (
@@ -41,15 +44,6 @@ const (
 )
 
 var (
-	// defaultUserAgent builds a string containing the Go version, system archityecture and OS,
-	// and the go-autorest version.
-	defaultUserAgent = fmt.Sprintf("Go/%s (%s-%s) go-autorest/%s",
-		runtime.Version(),
-		runtime.GOARCH,
-		runtime.GOOS,
-		Version(),
-	)
-
 	// StatusCodesForRetry are a defined group of status code for which the client will retry
 	StatusCodesForRetry = []int{
 		http.StatusRequestTimeout,      // 408
@@ -179,7 +173,7 @@ func NewClientWithUserAgent(ua string) Client {
 		PollingDuration: DefaultPollingDuration,
 		RetryAttempts:   DefaultRetryAttempts,
 		RetryDuration:   DefaultRetryDuration,
-		UserAgent:       defaultUserAgent,
+		UserAgent:       version.UserAgent(),
 	}
 	c.Sender = c.sender()
 	c.AddToUserAgent(ua)
@@ -216,8 +210,17 @@ func (c Client) Do(r *http.Request) (*http.Response, error) {
 		}
 		return resp, NewErrorWithError(err, "autorest/Client", "Do", nil, "Preparing request failed")
 	}
-
+	logger.Instance.WriteRequest(r, logger.Filter{
+		Header: func(k string, v []string) (bool, []string) {
+			// remove the auth token from the log
+			if strings.EqualFold(k, "Authorization") || strings.EqualFold(k, "Ocp-Apim-Subscription-Key") {
+				v = []string{"**REDACTED**"}
+			}
+			return true, v
+		},
+	})
 	resp, err := SendWithSender(c.sender(), r)
+	logger.Instance.WriteResponse(resp, logger.Filter{})
 	Respond(resp, c.ByInspecting())
 	return resp, err
 }

vendor/github.com/Azure/go-autorest/autorest/version.go

@@ -1,5 +1,7 @@
 package autorest
 
+import "github.com/Azure/go-autorest/version"
+
 // Copyright 2017 Microsoft Corporation
 //
 //  Licensed under the Apache License, Version 2.0 (the "License");
@@ -16,5 +18,5 @@ package autorest
 
 // Version returns the semantic version (see http://semver.org).
 func Version() string {
-	return "v10.12.0"
+	return version.Number
 }

vendor/github.com/Azure/go-autorest/logger/logger.go

@@ -0,0 +1,328 @@
+package logger
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"sync"
+	"time"
+)
+
+// LevelType tells a logger the minimum level to log. When code reports a log entry,
+// the LogLevel indicates the level of the log entry. The logger only records entries
+// whose level is at least the level it was told to log. See the Log* constants.
+// For example, if a logger is configured with LogError, then LogError, LogPanic,
+// and LogFatal entries will be logged; lower level entries are ignored.
+type LevelType uint32
+
+const (
+	// LogNone tells a logger not to log any entries passed to it.
+	LogNone LevelType = iota
+
+	// LogFatal tells a logger to log all LogFatal entries passed to it.
+	LogFatal
+
+	// LogPanic tells a logger to log all LogPanic and LogFatal entries passed to it.
+	LogPanic
+
+	// LogError tells a logger to log all LogError, LogPanic and LogFatal entries passed to it.
+	LogError
+
+	// LogWarning tells a logger to log all LogWarning, LogError, LogPanic and LogFatal entries passed to it.
+	LogWarning
+
+	// LogInfo tells a logger to log all LogInfo, LogWarning, LogError, LogPanic and LogFatal entries passed to it.
+	LogInfo
+
+	// LogDebug tells a logger to log all LogDebug, LogInfo, LogWarning, LogError, LogPanic and LogFatal entries passed to it.
+	LogDebug
+)
+
+const (
+	logNone    = "NONE"
+	logFatal   = "FATAL"
+	logPanic   = "PANIC"
+	logError   = "ERROR"
+	logWarning = "WARNING"
+	logInfo    = "INFO"
+	logDebug   = "DEBUG"
+	logUnknown = "UNKNOWN"
+)
+
+// ParseLevel converts the specified string into the corresponding LevelType.
+func ParseLevel(s string) (lt LevelType, err error) {
+	switch strings.ToUpper(s) {
+	case logFatal:
+		lt = LogFatal
+	case logPanic:
+		lt = LogPanic
+	case logError:
+		lt = LogError
+	case logWarning:
+		lt = LogWarning
+	case logInfo:
+		lt = LogInfo
+	case logDebug:
+		lt = LogDebug
+	default:
+		err = fmt.Errorf("bad log level '%s'", s)
+	}
+	return
+}
+
+// String implements the stringer interface for LevelType.
+func (lt LevelType) String() string {
+	switch lt {
+	case LogNone:
+		return logNone
+	case LogFatal:
+		return logFatal
+	case LogPanic:
+		return logPanic
+	case LogError:
+		return logError
+	case LogWarning:
+		return logWarning
+	case LogInfo:
+		return logInfo
+	case LogDebug:
+		return logDebug
+	default:
+		return logUnknown
+	}
+}
+
+// Filter defines functions for filtering HTTP request/response content.
+type Filter struct {
+	// URL returns a potentially modified string representation of a request URL.
+	URL func(u *url.URL) string
+
+	// Header returns a potentially modified set of values for the specified key.
+	// To completely exclude the header key/values return false.
+	Header func(key string, val []string) (bool, []string)
+
+	// Body returns a potentially modified request/response body.
+	Body func(b []byte) []byte
+}
+
+func (f Filter) processURL(u *url.URL) string {
+	if f.URL == nil {
+		return u.String()
+	}
+	return f.URL(u)
+}
+
+func (f Filter) processHeader(k string, val []string) (bool, []string) {
+	if f.Header == nil {
+		return true, val
+	}
+	return f.Header(k, val)
+}
+
+func (f Filter) processBody(b []byte) []byte {
+	if f.Body == nil {
+		return b
+	}
+	return f.Body(b)
+}
+
+// Writer defines methods for writing to a logging facility.
+type Writer interface {
+	// Writeln writes the specified message with the standard log entry header and new-line character.
+	Writeln(level LevelType, message string)
+
+	// Writef writes the specified format specifier with the standard log entry header and no new-line character.
+	Writef(level LevelType, format string, a ...interface{})
+
+	// WriteRequest writes the specified HTTP request to the logger if the log level is greater than
+	// or equal to LogInfo.  The request body, if set, is logged at level LogDebug or higher.
+	// Custom filters can be specified to exclude URL, header, and/or body content from the log.
+	// By default no request content is excluded.
+	WriteRequest(req *http.Request, filter Filter)
+
+	// WriteResponse writes the specified HTTP response to the logger if the log level is greater than
+	// or equal to LogInfo.  The response body, if set, is logged at level LogDebug or higher.
+	// Custom filters can be specified to exclude URL, header, and/or body content from the log.
+	// By default no respone content is excluded.
+	WriteResponse(resp *http.Response, filter Filter)
+}
+
+// Instance is the default log writer initialized during package init.
+// This can be replaced with a custom implementation as required.
+var Instance Writer
+
+// default log level
+var logLevel = LogNone
+
+// Level returns the value specified in AZURE_GO_AUTOREST_LOG_LEVEL.
+// If no value was specified the default value is LogNone.
+// Custom loggers can call this to retrieve the configured log level.
+func Level() LevelType {
+	return logLevel
+}
+
+func init() {
+	// separated for testing purposes
+	initDefaultLogger()
+}
+
+func initDefaultLogger() {
+	// init with nilLogger so callers don't have to do a nil check on Default
+	Instance = nilLogger{}
+	llStr := strings.ToLower(os.Getenv("AZURE_GO_SDK_LOG_LEVEL"))
+	if llStr == "" {
+		return
+	}
+	var err error
+	logLevel, err = ParseLevel(llStr)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "go-autorest: failed to parse log level: %s\n", err.Error())
+		return
+	}
+	if logLevel == LogNone {
+		return
+	}
+	// default to stderr
+	dest := os.Stderr
+	lfStr := os.Getenv("AZURE_GO_SDK_LOG_FILE")
+	if strings.EqualFold(lfStr, "stdout") {
+		dest = os.Stdout
+	} else if lfStr != "" {
+		lf, err := os.Create(lfStr)
+		if err == nil {
+			dest = lf
+		} else {
+			fmt.Fprintf(os.Stderr, "go-autorest: failed to create log file, using stderr: %s\n", err.Error())
+		}
+	}
+	Instance = fileLogger{
+		logLevel: logLevel,
+		mu:       &sync.Mutex{},
+		logFile:  dest,
+	}
+}
+
+// the nil logger does nothing
+type nilLogger struct{}
+
+func (nilLogger) Writeln(LevelType, string) {}
+
+func (nilLogger) Writef(LevelType, string, ...interface{}) {}
+
+func (nilLogger) WriteRequest(*http.Request, Filter) {}
+
+func (nilLogger) WriteResponse(*http.Response, Filter) {}
+
+// A File is used instead of a Logger so the stream can be flushed after every write.
+type fileLogger struct {
+	logLevel LevelType
+	mu       *sync.Mutex // for synchronizing writes to logFile
+	logFile  *os.File
+}
+
+func (fl fileLogger) Writeln(level LevelType, message string) {
+	fl.Writef(level, "%s\n", message)
+}
+
+func (fl fileLogger) Writef(level LevelType, format string, a ...interface{}) {
+	if fl.logLevel >= level {
+		fl.mu.Lock()
+		defer fl.mu.Unlock()
+		fmt.Fprintf(fl.logFile, "%s %s", entryHeader(level), fmt.Sprintf(format, a...))
+		fl.logFile.Sync()
+	}
+}
+
+func (fl fileLogger) WriteRequest(req *http.Request, filter Filter) {
+	if req == nil || fl.logLevel < LogInfo {
+		return
+	}
+	b := &bytes.Buffer{}
+	fmt.Fprintf(b, "%s REQUEST: %s %s\n", entryHeader(LogInfo), req.Method, filter.processURL(req.URL))
+	// dump headers
+	for k, v := range req.Header {
+		if ok, mv := filter.processHeader(k, v); ok {
+			fmt.Fprintf(b, "%s: %s\n", k, strings.Join(mv, ","))
+		}
+	}
+	if fl.shouldLogBody(req.Header, req.Body) {
+		// dump body
+		body, err := ioutil.ReadAll(req.Body)
+		if err == nil {
+			fmt.Fprintln(b, string(filter.processBody(body)))
+			if nc, ok := req.Body.(io.Seeker); ok {
+				// rewind to the beginning
+				nc.Seek(0, io.SeekStart)
+			} else {
+				// recreate the body
+				req.Body = ioutil.NopCloser(bytes.NewReader(body))
+			}
+		} else {
+			fmt.Fprintf(b, "failed to read body: %v\n", err)
+		}
+	}
+	fl.mu.Lock()
+	defer fl.mu.Unlock()
+	fmt.Fprint(fl.logFile, b.String())
+	fl.logFile.Sync()
+}
+
+func (fl fileLogger) WriteResponse(resp *http.Response, filter Filter) {
+	if resp == nil || fl.logLevel < LogInfo {
+		return
+	}
+	b := &bytes.Buffer{}
+	fmt.Fprintf(b, "%s RESPONSE: %d %s\n", entryHeader(LogInfo), resp.StatusCode, filter.processURL(resp.Request.URL))
+	// dump headers
+	for k, v := range resp.Header {
+		if ok, mv := filter.processHeader(k, v); ok {
+			fmt.Fprintf(b, "%s: %s\n", k, strings.Join(mv, ","))
+		}
+	}
+	if fl.shouldLogBody(resp.Header, resp.Body) {
+		// dump body
+		defer resp.Body.Close()
+		body, err := ioutil.ReadAll(resp.Body)
+		if err == nil {
+			fmt.Fprintln(b, string(filter.processBody(body)))
+			resp.Body = ioutil.NopCloser(bytes.NewReader(body))
+		} else {
+			fmt.Fprintf(b, "failed to read body: %v\n", err)
+		}
+	}
+	fl.mu.Lock()
+	defer fl.mu.Unlock()
+	fmt.Fprint(fl.logFile, b.String())
+	fl.logFile.Sync()
+}
+
+// returns true if the provided body should be included in the log
+func (fl fileLogger) shouldLogBody(header http.Header, body io.ReadCloser) bool {
+	ct := header.Get("Content-Type")
+	return fl.logLevel >= LogDebug && body != nil && strings.Index(ct, "application/octet-stream") == -1
+}
+
+// creates standard header for log entries, it contains a timestamp and the log level
+func entryHeader(level LevelType) string {
+	// this format provides a fixed number of digits so the size of the timestamp is constant
+	return fmt.Sprintf("(%s) %s:", time.Now().Format("2006-01-02T15:04:05.0000000Z07:00"), level.String())
+}

vendor/github.com/Azure/go-autorest/version/version.go

@@ -0,0 +1,37 @@
+package version
+
+// Copyright 2017 Microsoft Corporation
+//
+//  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.
+
+import (
+	"fmt"
+	"runtime"
+)
+
+// Number contains the semantic version of this SDK.
+const Number = "v10.15.4"
+
+var (
+	userAgent = fmt.Sprintf("Go/%s (%s-%s) go-autorest/%s",
+		runtime.Version(),
+		runtime.GOARCH,
+		runtime.GOOS,
+		Number,
+	)
+)
+
+// UserAgent returns a string containing the Go version, system archityecture and OS, and the go-autorest version.
+func UserAgent() string {
+	return userAgent
+}