Upgrade faas-provider to 0.9.2

Signed-off-by: Lucas Roesler <roesler.lucas@gmail.com>

gateway/vendor/github.com/openfaas/faas-provider/Gopkg.lock

@@ -17,9 +17,23 @@
   revision = "e3702bed27f0d39777b0b37b664b6280e8ef8fbf"
   version = "v1.6.2"
 
+[[projects]]
+  digest = "1:9a1bb99a85e2ccddbc593aa0af084cdf6ea18ed081469eb90e7f6d0d303af6cd"
+  name = "go.uber.org/goleak"
+  packages = [
+    ".",
+    "internal/stack",
+  ]
+  pruneopts = "UT"
+  revision = "1ac8aeca0a53163331564467638f6ffb639636bf"
+  version = "v0.10.0"
+
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  input-imports = ["github.com/gorilla/mux"]
+  input-imports = [
+    "github.com/gorilla/mux",
+    "go.uber.org/goleak",
+  ]
   solver-name = "gps-cdcl"
   solver-version = 1

gateway/vendor/github.com/openfaas/faas-provider/README.md

@@ -14,7 +14,7 @@ The faas-provider provides CRUD for functions and an invoke capability. If you c
 The following is used in OpenFaaS and recommended for those seeking to build their own back-ends:
 
 * License: MIT
-* Language: Golang 
+* Language: Golang
 
 ### How to use this project
 
@@ -25,6 +25,7 @@ For an example see the [server.go](https://github.com/openfaas/faas-netes/blob/m
 I.e.:
 
 ```go
+	timeout := 8 * time.Second
 	bootstrapHandlers := bootTypes.FaaSHandlers{
 		FunctionProxy:  handlers.MakeProxy(),
 		DeleteHandler:  handlers.MakeDeleteHandler(clientset),
@@ -33,13 +34,14 @@ I.e.:
 		ReplicaReader:  handlers.MakeReplicaReader(clientset),
 		ReplicaUpdater: handlers.MakeReplicaUpdater(clientset),
 		InfoHandler:    handlers.MakeInfoHandler(),
+		LogHandler: logs.NewLogHandlerFunc(requestor,timeout),
 	}
 
 	var port int
 	port = 8080
 	bootstrapConfig := bootTypes.FaaSConfig{
-		ReadTimeout:  time.Second * 8,
-		WriteTimeout: time.Second * 8,
+		ReadTimeout:  timeout,
+		WriteTimeout: timeout,
 		TCPPort:      &port,
 	}
 

gateway/vendor/github.com/openfaas/faas-provider/httputil/writers.go

@@ -0,0 +1,12 @@
+package httputil
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// Errorf sets the response status code and write formats the provided message as the
+// response body
+func Errorf(w http.ResponseWriter, statusCode int, msg string, args ...interface{}) {
+	http.Error(w, fmt.Sprintf(msg, args...), statusCode)
+}

gateway/vendor/github.com/openfaas/faas-provider/logs/example/README.md

@@ -0,0 +1,2 @@
+# Static Log Server Example
+This example shows a very basic static log server. It will return the same 3 log messages for every request.

gateway/vendor/github.com/openfaas/faas-provider/logs/example/main.go

@@ -0,0 +1,47 @@
+package main
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/openfaas/faas-provider/logs"
+)
+
+// staticLogRequestor implements the logs Requestor returning a static stream of logs
+type staticLogRequestor struct {
+	logs []string
+}
+
+func (s staticLogRequestor) Query(ctx context.Context, r logs.Request) (<-chan logs.Message, error) {
+	resp := make(chan logs.Message, len(s.logs))
+
+	// A real implementation would possibly run a query to their log storage here, if it returns a
+	// channel, and pass that channel to the go routine below instead of ranging over `s.logs`
+	// If the log storage backend client does not return a channel, the query would need to
+	// occur at the beginning of the goroutine below ... or a separate goroutine
+
+	go func() {
+		for _, m := range s.logs {
+			// always watch the ctx to timeout/cancel/finish
+			if ctx.Err() != nil {
+				return
+			}
+
+			resp <- logs.Message{
+				Name:      r.Name,
+				Instance:  "fake",
+				Timestamp: time.Now(),
+				Text:      m,
+			}
+		}
+	}()
+
+	return resp, nil
+}
+
+func main() {
+	requestor := staticLogRequestor{logs: []string{"msg1", "msg2", "something interesting"}}
+	http.HandleFunc("/system/logs", logs.NewLogHandlerFunc(requestor, 10*time.Second))
+	http.ListenAndServe(":80", nil)
+}

gateway/vendor/github.com/openfaas/faas-provider/logs/handler.go

@@ -0,0 +1,142 @@
+package logs
+
+import (
+	"context"
+	"encoding/json"
+	"log"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+
+	"github.com/openfaas/faas-provider/httputil"
+)
+
+// Requester submits queries the logging system.
+// This will be passed to the log handler constructor.
+type Requester interface {
+	// Query submits a log request to the actual logging system.
+	Query(context.Context, Request) (<-chan Message, error)
+}
+
+// NewLogHandlerFunc creates an http HandlerFunc from the supplied log Requestor.
+func NewLogHandlerFunc(requestor Requester, timeout time.Duration) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if r.Body != nil {
+			defer r.Body.Close()
+		}
+
+		cn, ok := w.(http.CloseNotifier)
+		if !ok {
+			log.Println("LogHandler: response is not a CloseNotifier, required for streaming response")
+			http.NotFound(w, r)
+			return
+		}
+		flusher, ok := w.(http.Flusher)
+		if !ok {
+			log.Println("LogHandler: response is not a Flusher, required for streaming response")
+			http.NotFound(w, r)
+			return
+		}
+
+		logRequest, err := parseRequest(r)
+		if err != nil {
+			log.Printf("LogHandler: could not parse request %s", err)
+			httputil.Errorf(w, http.StatusUnprocessableEntity, "could not parse the log request")
+			return
+		}
+
+		ctx, cancelQuery := context.WithTimeout(r.Context(), timeout)
+		defer cancelQuery()
+		messages, err := requestor.Query(ctx, logRequest)
+		if err != nil {
+			// add smarter error handling here
+			httputil.Errorf(w, http.StatusInternalServerError, "function log request failed")
+			return
+		}
+
+		// Send the initial headers saying we're gonna stream the response.
+		w.Header().Set("Connection", "Keep-Alive")
+		w.Header().Set("Transfer-Encoding", "chunked")
+		w.Header().Set(http.CanonicalHeaderKey("Content-Type"), "application/x-ndjson")
+		w.WriteHeader(http.StatusOK)
+		flusher.Flush()
+
+		// ensure that we always try to send the closing chunk, not the inverted order due to how
+		// the defer stack works. We need two flush statements to ensure that the empty slice is
+		// sent as its own chunk
+		defer flusher.Flush()
+		defer w.Write([]byte{})
+		defer flusher.Flush()
+
+		jsonEncoder := json.NewEncoder(w)
+		for messages != nil {
+			select {
+			case <-cn.CloseNotify():
+				log.Println("LogHandler: client stopped listening")
+				return
+			case msg, ok := <-messages:
+				if !ok {
+					log.Println("LogHandler: end of log stream")
+					messages = nil
+					return
+				}
+
+				// serialize and write the msg to the http ResponseWriter
+				err := jsonEncoder.Encode(msg)
+				if err != nil {
+					// can't actually write the status header here so we should json serialize an error
+					// and return that because we have already sent the content type and status code
+					log.Printf("LogHandler: failed to serialize log message: '%s'\n", msg.String())
+					log.Println(err.Error())
+					// write json error message here ?
+					jsonEncoder.Encode(Message{Text: "failed to serialize log message"})
+					flusher.Flush()
+					return
+				}
+
+				flusher.Flush()
+			}
+		}
+
+		return
+	}
+}
+
+// parseRequest extracts the logRequest from the GET variables or from the POST body
+func parseRequest(r *http.Request) (logRequest Request, err error) {
+	query := r.URL.Query()
+	logRequest.Name = getValue(query, "name")
+	logRequest.Instance = getValue(query, "instance")
+	tailStr := getValue(query, "tail")
+	if tailStr != "" {
+		logRequest.Tail, err = strconv.Atoi(tailStr)
+		if err != nil {
+			return logRequest, err
+		}
+	}
+	// ignore error because it will default to false if we can't parse it
+	logRequest.Follow, _ = strconv.ParseBool(getValue(query, "follow"))
+
+	sinceStr := getValue(query, "since")
+	if sinceStr != "" {
+		since, err := time.Parse(time.RFC3339, sinceStr)
+		logRequest.Since = &since
+		if err != nil {
+			return logRequest, err
+		}
+	}
+
+	return logRequest, nil
+}
+
+// getValue returns the value for the given key. If the key has more than one value, it returns the
+// last value. if the value does not exist, it returns the empty string.
+func getValue(queryValues url.Values, name string) string {
+	values := queryValues[name]
+	if len(values) == 0 {
+		return ""
+	}
+
+	return values[len(values)-1]
+}

gateway/vendor/github.com/openfaas/faas-provider/logs/handler_test.go

@@ -0,0 +1,191 @@
+package logs
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"go.uber.org/goleak"
+)
+
+var queryTimeout = 30 * time.Second
+
+func Test_logsHandlerDoesNotLeakGoroutinesWhenProviderClosesStream(t *testing.T) {
+	defer goleak.VerifyNoLeaks(t)
+
+	msgs := []Message{
+		Message{Name: "funcFoo", Text: "msg 0"},
+		Message{Name: "funcFoo", Text: "msg 1"},
+	}
+
+	var expected bytes.Buffer
+	json.NewEncoder(&expected).Encode(msgs[0])
+	json.NewEncoder(&expected).Encode(msgs[1])
+
+	querier := newFakeQueryRequester(msgs, nil)
+	logHandler := NewLogHandlerFunc(querier, queryTimeout)
+	testSrv := httptest.NewServer(http.HandlerFunc(logHandler))
+	defer testSrv.Close()
+
+	resp, err := http.Get(testSrv.URL + "?name=funcFoo")
+	if err != nil {
+		t.Fatalf("unexpected error sending log request: %s", err)
+	}
+
+	querier.Close()
+
+	defer resp.Body.Close()
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		t.Fatalf("unexpected error reading log response: %s", err)
+	}
+
+	if string(body) != expected.String() {
+		t.Fatalf("expected log message %s, got: %s", expected.String(), body)
+	}
+}
+
+func Test_logsHandlerDoesNotLeakGoroutinesWhenClientClosesConnection(t *testing.T) {
+	defer goleak.VerifyNoLeaks(t)
+
+	msgs := []Message{
+		Message{Name: "funcFoo", Text: "msg 0"},
+		Message{Name: "funcFoo", Text: "msg 1"},
+	}
+
+	querier := newFakeQueryRequester(msgs, nil)
+	logHandler := NewLogHandlerFunc(querier, queryTimeout)
+	testSrv := httptest.NewServer(http.HandlerFunc(logHandler))
+	defer testSrv.Close()
+
+	reqContext, cancel := context.WithCancel(context.Background())
+	req, _ := http.NewRequest(http.MethodGet, testSrv.URL+"?name=funcFoo", nil)
+
+	req = req.WithContext(reqContext)
+
+	resp, err := http.DefaultClient.Do(req)
+	if err != nil {
+		t.Fatalf("unexpected error sending log request: %s", err)
+	}
+
+	go func() {
+		defer resp.Body.Close()
+		_, err := ioutil.ReadAll(resp.Body)
+		if err != context.Canceled {
+			t.Fatalf("unexpected error reading log response: %s", err)
+		}
+	}()
+	cancel()
+}
+
+func Test_GETRequestParsing(t *testing.T) {
+	sinceTime, _ := time.Parse(time.RFC3339, "2019-02-16T09:10:06+00:00")
+	scenarios := []struct {
+		name            string
+		rawQueryStr     string
+		err             string
+		expectedRequest Request
+	}{
+		{
+			name:            "empty query creates an empty request",
+			rawQueryStr:     "",
+			err:             "",
+			expectedRequest: Request{},
+		},
+		{
+			name:            "name only query",
+			rawQueryStr:     "name=foobar",
+			err:             "",
+			expectedRequest: Request{Name: "foobar"},
+		},
+		{
+			name:            "name only query",
+			rawQueryStr:     "name=foobar",
+			err:             "",
+			expectedRequest: Request{Name: "foobar"},
+		},
+		{
+			name:            "multiple name values selects the last value",
+			rawQueryStr:     "name=foobar&name=theactual name",
+			err:             "",
+			expectedRequest: Request{Name: "theactual name"},
+		},
+		{
+			name:        "valid request with every parameter",
+			rawQueryStr: "name=foobar&since=2019-02-16T09%3A10%3A06%2B00%3A00&tail=5&follow=true",
+			err:         "",
+			expectedRequest: Request{
+				Name:   "foobar",
+				Since:  &sinceTime,
+				Tail:   5,
+				Follow: true,
+			},
+		},
+	}
+
+	req := httptest.NewRequest(http.MethodGet, "/", nil)
+
+	for _, s := range scenarios {
+		t.Run(s.name, func(t *testing.T) {
+			req.URL.RawQuery = s.rawQueryStr
+			logRequest, err := parseRequest(req)
+			equalError(t, s.err, err)
+
+			if logRequest.String() != s.expectedRequest.String() {
+				t.Errorf("expected log request: %s, got: %s", s.expectedRequest, logRequest)
+			}
+		})
+	}
+}
+
+func equalError(t *testing.T, expected string, actual error) {
+	if expected == "" && actual == nil {
+		return
+	}
+
+	if expected == "" && actual != nil {
+		t.Errorf("unexpected error: %s", actual.Error())
+		return
+	}
+
+	if actual.Error() != expected {
+		t.Errorf("expected error: %s got: %s", expected, actual.Error())
+	}
+}
+
+type fakeQueryRequester struct {
+	Logs   []Message
+	err    error
+	stream chan Message
+}
+
+func (r fakeQueryRequester) Close() {
+	close(r.stream)
+	r.stream = nil
+}
+
+func (r fakeQueryRequester) Query(context.Context, Request) (<-chan Message, error) {
+	if r.err != nil {
+		return nil, r.err
+	}
+
+	for _, m := range r.Logs {
+		r.stream <- m
+	}
+
+	return r.stream, nil
+}
+
+func newFakeQueryRequester(l []Message, err error) fakeQueryRequester {
+	return fakeQueryRequester{
+		Logs:   l,
+		err:    err,
+		stream: make(chan Message, len(l)),
+	}
+
+}

gateway/vendor/github.com/openfaas/faas-provider/logs/logs.go

@@ -0,0 +1,50 @@
+// Package logs provides the standard interface and handler for OpenFaaS providers to expose function logs.
+//
+// The package defines the Requester interface that OpenFaaS providers should implement and then expose using
+// the predefined NewLogHandlerFunc. See the example folder for a minimal log provider implementation.
+//
+// The Requester is where the actual specific logic for connecting to and querying the log system should be implemented.
+//
+package logs
+
+import (
+	"fmt"
+	"time"
+)
+
+// Request is the query to return the function logs.
+type Request struct {
+	// Name is the function name and is required
+	Name string `json:"name"`
+	// Instance is the optional container name, that allows you to request logs from a specific function instance
+	Instance string `json:"instance"`
+	// Since is the optional datetime value to start the logs from
+	Since *time.Time `json:"since"`
+	// Tail sets the maximum number of log messages to return, <=0 means unlimited
+	Tail int `json:"tail"`
+	// Follow is allows the user to request a stream of logs until the timeout
+	Follow bool `json:"follow"`
+}
+
+// String implements that Stringer interface and prints the log Request in a consistent way that
+// allows you to safely compare if two requests have the same value.
+func (r Request) String() string {
+	return fmt.Sprintf("name:%s instance:%s since:%v tail:%d follow:%v", r.Name, r.Instance, r.Since, r.Tail, r.Follow)
+}
+
+// Message is a specific log message from a function container log stream
+type Message struct {
+	// Name is the function name
+	Name string `json:"name"`
+	// instance is the name/id of the specific function instance
+	Instance string `json:"instance"`
+	// Timestamp is the timestamp of when the log message was recorded
+	Timestamp time.Time `json:"timestamp"`
+	// Text is the raw log message content
+	Text string `json:"text"`
+}
+
+// String implements the Stringer interface and allows for nice and simple string formatting of a log Message.
+func (m Message) String() string {
+	return fmt.Sprintf("%s %s (%s) %s", m.Timestamp.String(), m.Name, m.Instance, m.Text)
+}

gateway/vendor/github.com/openfaas/faas-provider/proxy/handler_test.go

@@ -86,7 +86,7 @@ func Test_ProxyHandler_MissingFunctionNameError(t *testing.T) {
 		t.Errorf("expected status code `%d`, got `%d`", http.StatusBadRequest, w.Code)
 	}
 
-	respBody := w.Body.String()
+	respBody := strings.TrimSpace(w.Body.String())
 	if respBody != errMissingFunctionName {
 		t.Errorf("expected error message `%s`, got `%s`", errMissingFunctionName, respBody)
 	}
@@ -109,7 +109,7 @@ func Test_ProxyHandler_ResolveError(t *testing.T) {
 		t.Errorf("expected status code `%d`, got `%d`", http.StatusBadRequest, w.Code)
 	}
 
-	respBody := w.Body.String()
+	respBody := strings.TrimSpace(w.Body.String())
 	if respBody != "Cannot find service: foo." {
 		t.Errorf("expected error message `%s`, got `%s`", "Cannot find service: foo.", respBody)
 	}

gateway/vendor/github.com/openfaas/faas-provider/proxy/proxy.go

@@ -21,7 +21,6 @@
 package proxy
 
 import (
-	"fmt"
 	"io"
 	"log"
 	"net"
@@ -30,6 +29,7 @@ import (
 	"time"
 
 	"github.com/gorilla/mux"
+	"github.com/openfaas/faas-provider/httputils"
 )
 
 const (
@@ -112,7 +112,7 @@ func proxyRequest(w http.ResponseWriter, originalReq *http.Request, proxyClient
 	pathVars := mux.Vars(originalReq)
 	functionName := pathVars["name"]
 	if functionName == "" {
-		writeError(w, http.StatusBadRequest, errMissingFunctionName)
+		httputils.Errorf(w, http.StatusBadRequest, errMissingFunctionName)
 		return
 	}
 
@@ -120,13 +120,13 @@ func proxyRequest(w http.ResponseWriter, originalReq *http.Request, proxyClient
 	if resolveErr != nil {
 		// TODO: Should record the 404/not found error in Prometheus.
 		log.Printf("resolver error: cannot find %s: %s\n", functionName, resolveErr.Error())
-		writeError(w, http.StatusNotFound, "Cannot find service: %s.", functionName)
+		httputils.Errorf(w, http.StatusNotFound, "Cannot find service: %s.", functionName)
 		return
 	}
 
 	proxyReq, err := buildProxyRequest(originalReq, functionAddr, pathVars["params"])
 	if err != nil {
-		writeError(w, http.StatusInternalServerError, "Failed to resolve service: %s.", functionName)
+		httputils.Errorf(w, http.StatusInternalServerError, "Failed to resolve service: %s.", functionName)
 		return
 	}
 	if proxyReq.Body != nil {
@@ -140,7 +140,7 @@ func proxyRequest(w http.ResponseWriter, originalReq *http.Request, proxyClient
 	if err != nil {
 		log.Printf("error with proxy request to: %s, %s\n", proxyReq.URL.String(), err.Error())
 
-		writeError(w, http.StatusInternalServerError, "Can't reach service for: %s.", functionName)
+		httputils.Errorf(w, http.StatusInternalServerError, "Can't reach service for: %s.", functionName)
 		return
 	}
 
@@ -214,10 +214,3 @@ func getContentType(request http.Header, proxyResponse http.Header) (headerConte
 
 	return headerContentType
 }
-
-// writeError sets the response status code and write formats the provided message as the
-// response body
-func writeError(w http.ResponseWriter, statusCode int, msg string, args ...interface{}) {
-	w.WriteHeader(statusCode)
-	w.Write([]byte(fmt.Sprintf(msg, args...)))
-}

gateway/vendor/github.com/openfaas/faas-provider/serve.go

@@ -46,6 +46,7 @@ func Serve(handlers *types.FaaSHandlers, config *types.FaaSConfig) {
 		handlers.ReplicaUpdater = auth.DecorateWithBasicAuth(handlers.ReplicaUpdater, credentials)
 		handlers.InfoHandler = auth.DecorateWithBasicAuth(handlers.InfoHandler, credentials)
 		handlers.SecretHandler = auth.DecorateWithBasicAuth(handlers.SecretHandler, credentials)
+		handlers.LogHandler = auth.DecorateWithBasicAuth(handlers.LogHandler, credentials)
 	}
 
 	// System (auth) endpoints
@@ -59,6 +60,7 @@ func Serve(handlers *types.FaaSHandlers, config *types.FaaSConfig) {
 	r.HandleFunc("/system/info", handlers.InfoHandler).Methods("GET")
 
 	r.HandleFunc("/system/secrets", handlers.SecretHandler).Methods(http.MethodGet, http.MethodPut, http.MethodPost, http.MethodDelete)
+	r.HandleFunc("/system/logs", handlers.LogHandler).Methods(http.MethodGet)
 
 	// Open endpoints
 	r.HandleFunc("/function/{name:[-a-zA-Z_0-9]+}", handlers.FunctionProxy)

gateway/vendor/github.com/openfaas/faas-provider/types/config.go

@@ -16,6 +16,8 @@ type FaaSHandlers struct {
 	ReplicaReader  http.HandlerFunc
 	ReplicaUpdater http.HandlerFunc
 	SecretHandler  http.HandlerFunc
+	// LogHandler provides streaming json logs of functions
+	LogHandler http.HandlerFunc
 
 	// Optional: Update an existing function
 	UpdateHandler http.HandlerFunc