added REQHttpGetScheduled

central_auth.go

@@ -5,6 +5,8 @@ type argsString string
 
 type centralAuth struct {
 	schema map[Node]map[argsString]signatureBase32
+
+	configuration *Configuration
 }
 
 func newCentralAuth() *centralAuth {

configuration_flags.go

@@ -105,6 +105,8 @@ type Configuration struct {
 	StartSubREQToConsole bool
 	// Subscriber for REQHttpGet
 	StartSubREQHttpGet bool
+	// Subscriber for REQHttpGetScheduled
+	StartSubREQHttpGetScheduled bool
 	// Subscriber for tailing log files
 	StartSubREQTailFile bool
 	// Subscriber for continously delivery of output from cli commands.
@@ -150,21 +152,22 @@ type ConfigurationFromFile struct {
 	EnableSignatureCheck     *bool
 	IsCentralAuth            *bool
 
-	StartPubREQHello          *int
-	StartSubREQErrorLog       *bool
-	StartSubREQHello          *bool
-	StartSubREQToFileAppend   *bool
-	StartSubREQToFile         *bool
-	StartSubREQCopyFileFrom   *bool
-	StartSubREQCopyFileTo     *bool
-	StartSubREQPing           *bool
-	StartSubREQPong           *bool
-	StartSubREQCliCommand     *bool
-	StartSubREQToConsole      *bool
-	StartSubREQHttpGet        *bool
-	StartSubREQTailFile       *bool
-	StartSubREQCliCommandCont *bool
-	StartSubREQRelay          *bool
+	StartPubREQHello            *int
+	StartSubREQErrorLog         *bool
+	StartSubREQHello            *bool
+	StartSubREQToFileAppend     *bool
+	StartSubREQToFile           *bool
+	StartSubREQCopyFileFrom     *bool
+	StartSubREQCopyFileTo       *bool
+	StartSubREQPing             *bool
+	StartSubREQPong             *bool
+	StartSubREQCliCommand       *bool
+	StartSubREQToConsole        *bool
+	StartSubREQHttpGet          *bool
+	StartSubREQHttpGetScheduled *bool
+	StartSubREQTailFile         *bool
+	StartSubREQCliCommandCont   *bool
+	StartSubREQRelay            *bool
 }
 
 // NewConfiguration will return a *Configuration.
@@ -208,20 +211,21 @@ func newConfigurationDefaults() Configuration {
 		EnableSignatureCheck:     false,
 		IsCentralAuth:            false,
 
-		StartSubREQErrorLog:       true,
-		StartSubREQHello:          true,
-		StartSubREQToFileAppend:   true,
-		StartSubREQToFile:         true,
-		StartSubREQCopyFileFrom:   true,
-		StartSubREQCopyFileTo:     true,
-		StartSubREQPing:           true,
-		StartSubREQPong:           true,
-		StartSubREQCliCommand:     true,
-		StartSubREQToConsole:      true,
-		StartSubREQHttpGet:        true,
-		StartSubREQTailFile:       true,
-		StartSubREQCliCommandCont: true,
-		StartSubREQRelay:          false,
+		StartSubREQErrorLog:         true,
+		StartSubREQHello:            true,
+		StartSubREQToFileAppend:     true,
+		StartSubREQToFile:           true,
+		StartSubREQCopyFileFrom:     true,
+		StartSubREQCopyFileTo:       true,
+		StartSubREQPing:             true,
+		StartSubREQPong:             true,
+		StartSubREQCliCommand:       true,
+		StartSubREQToConsole:        true,
+		StartSubREQHttpGet:          true,
+		StartSubREQHttpGetScheduled: true,
+		StartSubREQTailFile:         true,
+		StartSubREQCliCommandCont:   true,
+		StartSubREQRelay:            false,
 	}
 	return c
 }
@@ -450,6 +454,11 @@ func checkConfigValues(cf ConfigurationFromFile) Configuration {
 	} else {
 		conf.StartSubREQHttpGet = *cf.StartSubREQHttpGet
 	}
+	if cf.StartSubREQHttpGetScheduled == nil {
+		conf.StartSubREQHttpGetScheduled = cd.StartSubREQHttpGetScheduled
+	} else {
+		conf.StartSubREQHttpGetScheduled = *cf.StartSubREQHttpGetScheduled
+	}
 	if cf.StartSubREQTailFile == nil {
 		conf.StartSubREQTailFile = cd.StartSubREQTailFile
 	} else {
@@ -542,6 +551,7 @@ func (c *Configuration) CheckFlags() error {
 	flag.BoolVar(&c.StartSubREQCliCommand, "startSubREQCliCommand", fc.StartSubREQCliCommand, "true/false")
 	flag.BoolVar(&c.StartSubREQToConsole, "startSubREQToConsole", fc.StartSubREQToConsole, "true/false")
 	flag.BoolVar(&c.StartSubREQHttpGet, "startSubREQHttpGet", fc.StartSubREQHttpGet, "true/false")
+	flag.BoolVar(&c.StartSubREQHttpGetScheduled, "startSubREQHttpGetScheduled", fc.StartSubREQHttpGetScheduled, "true/false")
 	flag.BoolVar(&c.StartSubREQTailFile, "startSubREQTailFile", fc.StartSubREQTailFile, "true/false")
 	flag.BoolVar(&c.StartSubREQCliCommandCont, "startSubREQCliCommandCont", fc.StartSubREQCliCommandCont, "true/false")
 	flag.BoolVar(&c.StartSubREQRelay, "startSubREQRelay", fc.StartSubREQRelay, "true/false")

processes.go

@@ -176,6 +176,10 @@ func (p *processes) Start(proc process) {
 		proc.startup.subREQHttpGet(proc)
 	}
 
+	if proc.configuration.StartSubREQHttpGetScheduled {
+		proc.startup.subREQHttpGetScheduled(proc)
+	}
+
 	if proc.configuration.StartSubREQTailFile {
 		proc.startup.subREQTailFile(proc)
 	}
@@ -228,6 +232,16 @@ func (s startup) subREQHttpGet(p process) {
 
 }
 
+func (s startup) subREQHttpGetScheduled(p process) {
+
+	log.Printf("Starting Http Get Scheduled subscriber: %#v\n", p.node)
+	sub := newSubject(REQHttpGetScheduled, string(p.node))
+	proc := newProcess(p.ctx, s.metrics, p.natsConn, p.processes, p.toRingbufferCh, p.configuration, sub, processKindSubscriber, nil, s.Signatures)
+
+	go proc.spawnWorker(p.processes, p.natsConn)
+
+}
+
 func (s startup) pubREQHello(p process) {
 	log.Printf("Starting Hello Publisher: %#v\n", p.node)
 

requests.go

@@ -44,6 +44,7 @@ import (
 	"os/exec"
 	"path"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -118,6 +119,9 @@ const (
 	REQPong Method = "REQPong"
 	// Http Get
 	REQHttpGet Method = "REQHttpGet"
+	// Http Get Scheduled
+	// The second element of the MethodArgs slice holds the timer defined in seconds.
+	REQHttpGetScheduled Method = "REQHttpGetScheduled"
 	// Tail file
 	REQTailFile Method = "REQTailFile"
 	// Write to steward socket
@@ -193,6 +197,9 @@ func (m Method) GetMethodsAvailable() MethodsAvailable {
 			REQHttpGet: methodREQHttpGet{
 				event: EventACK,
 			},
+			REQHttpGetScheduled: methodREQHttpGetScheduled{
+				event: EventACK,
+			},
 			REQTailFile: methodREQTailFile{
 				event: EventACK,
 			},
@@ -1391,7 +1398,7 @@ func (m methodREQHttpGet) handler(proc process, message Message, node string) ([
 
 			if resp.StatusCode != 200 {
 				cancel()
-				er := fmt.Errorf("error: methodREQHttpGet: not 200, where %#v, bailing out: %v", resp.StatusCode, message)
+				er := fmt.Errorf("error: methodREQHttpGet: not 200, were %#v, bailing out: %v", resp.StatusCode, message)
 				proc.processes.errorKernel.errSend(proc, message, er)
 				return
 			}
@@ -1431,6 +1438,156 @@ func (m methodREQHttpGet) handler(proc process, message Message, node string) ([
 	return ackMsg, nil
 }
 
+// ---
+
+type methodREQHttpGetScheduled struct {
+	event Event
+}
+
+func (m methodREQHttpGetScheduled) getKind() Event {
+	return m.event
+}
+
+// handler to do a Http Get Scheduled.
+// The second element of the MethodArgs slice holds the timer defined in seconds.
+func (m methodREQHttpGetScheduled) handler(proc process, message Message, node string) ([]byte, error) {
+	log.Printf("<--- REQHttpGetScheduled received from: %v, containing: %v", message.FromNode, message.Data)
+
+	proc.processes.wg.Add(1)
+	go func() {
+		defer proc.processes.wg.Done()
+
+		// --- Check and prepare the methodArgs
+
+		switch {
+		case len(message.MethodArgs) < 3:
+			er := fmt.Errorf("error: methodREQHttpGet: got <3 number methodArgs. Want URL, Schedule Interval in seconds, and the total time in minutes the scheduler should run for")
+			proc.processes.errorKernel.errSend(proc, message, er)
+			log.Printf("%v\n", er)
+			return
+		}
+
+		url := message.MethodArgs[0]
+
+		scheduleInterval, err := strconv.Atoi(message.MethodArgs[1])
+		if err != nil {
+			er := fmt.Errorf("error: methodREQHttpGetScheduled: schedule interval value is not a valid int number defined as a string value seconds: %v, bailing out: %v", err, message.MethodArgs)
+			proc.processes.errorKernel.errSend(proc, message, er)
+			return
+		}
+
+		// schedulerTotalTime, err := strconv.Atoi(message.MethodArgs[2])
+		if err != nil {
+			er := fmt.Errorf("error: methodREQHttpGetScheduled: scheduler total time value is not a valid int number defined as a string value minutes: %v, bailing out: %v", err, message.MethodArgs)
+			proc.processes.errorKernel.errSend(proc, message, er)
+			return
+		}
+
+		// --- Prepare and start the scheduler.
+
+		outCh := make(chan []byte)
+
+		ticker := time.NewTicker(time.Second * time.Duration(scheduleInterval))
+
+		// Prepare a context that will be for the schedule as a whole.
+		// NB: Individual http get's will create their own context's
+		// derived from this one.
+		ctxScheduler, cancel := context.WithTimeout(proc.ctx, time.Second*60)
+
+		go func() {
+			// Prepare the http request.
+			client := http.Client{
+				Timeout: time.Second * time.Duration(message.MethodTimeout),
+			}
+
+			for {
+
+				select {
+				case <-ticker.C:
+					proc.processes.wg.Add(1)
+
+					// Get a context with the timeout specified in message.MethodTimeout
+					// for the individual http requests.
+					ctx, cancel := getContextForMethodTimeout(proc.ctx, message)
+
+					req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
+					if err != nil {
+						er := fmt.Errorf("error: methodREQHttpGet: NewRequest failed: %v, error: %v", err, message.MethodArgs)
+						proc.processes.errorKernel.errSend(proc, message, er)
+						cancel()
+						return
+					}
+
+					// Run each individual http get in it's own go routine, and
+					// deliver the result on the outCh.
+					go func() {
+						defer proc.processes.wg.Done()
+
+						resp, err := client.Do(req)
+						if err != nil {
+							er := fmt.Errorf("error: methodREQHttpGet: client.Do failed: %v, error: %v", err, message.MethodArgs)
+							proc.processes.errorKernel.errSend(proc, message, er)
+							return
+						}
+						defer resp.Body.Close()
+
+						if resp.StatusCode != 200 {
+							cancel()
+							er := fmt.Errorf("error: methodREQHttpGet: not 200, were %#v, error: %v", resp.StatusCode, message)
+							proc.processes.errorKernel.errSend(proc, message, er)
+							return
+						}
+
+						body, err := io.ReadAll(resp.Body)
+						if err != nil {
+							er := fmt.Errorf("error: methodREQHttpGet: io.ReadAll failed : %v, methodArgs: %v", err, message.MethodArgs)
+							proc.processes.errorKernel.errSend(proc, message, er)
+							log.Printf("%v\n", er)
+						}
+
+						out := body
+
+						select {
+						case outCh <- out:
+						case <-ctx.Done():
+							return
+						case <-ctxScheduler.Done():
+							// If the scheduler context is done then we also want to kill
+							// all running http request.
+							cancel()
+							return
+						}
+					}()
+
+				case <-ctxScheduler.Done():
+					cancel()
+					return
+
+				}
+			}
+		}()
+
+		for {
+			select {
+			case <-ctxScheduler.Done():
+				fmt.Printf(" * DEBUG: <-ctxScheduler.Done()\n")
+				cancel()
+				er := fmt.Errorf("error: methodREQHttpGet: schedule context timed out: %v", message.MethodArgs)
+				proc.processes.errorKernel.errSend(proc, message, er)
+				return
+			case out := <-outCh:
+				// Prepare and queue for sending a new message with the output
+				// of the action executed.
+				newReplyMessage(proc, message, out)
+			}
+		}
+
+	}()
+
+	ackMsg := []byte("confirmed from: " + node + ": " + fmt.Sprint(message.ID))
+	return ackMsg, nil
+}
+
 // --- methodREQTailFile
 
 type methodREQTailFile struct {