SEBSERV-139 implementing GUI

2020-08-06 17:01:38 +02:00 · 2020-08-06 17:01:38 +02:00 · 548d4d132f
commit 548d4d132f
parent 6eedcbb4a0
13 changed files with 261 additions and 17 deletions
--- a/src/main/java/ch/ethz/seb/sebserver/gbl/api/API.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gbl/api/API.java
@ -126,7 +126,6 @@ public final class API {
    public static final String EXAM_ADMINISTRATION_CHECK_RESTRICTION_PATH_SEGMENT = "/check-seb-restriction";
    public static final String EXAM_ADMINISTRATION_CHECK_IMPORTED_PATH_SEGMENT = "/check-imported";
    public static final String EXAM_ADMINISTRATION_SEB_RESTRICTION_CHAPTERS_PATH_SEGMENT = "/chapters";
-
    public static final String EXAM_ADMINISTRATION_PROCTOR_PATH_SEGMENT = "/proctoring";

    public static final String EXAM_INDICATOR_ENDPOINT = "/indicator";
--- a/src/main/java/ch/ethz/seb/sebserver/gbl/model/exam/ProctoringSettings.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gbl/model/exam/ProctoringSettings.java
@ -18,8 +18,10 @@ import com.fasterxml.jackson.annotation.JsonProperty;
 import ch.ethz.seb.sebserver.gbl.api.EntityType;
 import ch.ethz.seb.sebserver.gbl.model.Domain;
 import ch.ethz.seb.sebserver.gbl.model.Entity;
+import ch.ethz.seb.sebserver.webservice.servicelayer.validation.ValidProctoringSettings;

@JsonIgnoreProperties(ignoreUnknown = true)
+@ValidProctoringSettings
 public class ProctoringSettings implements Entity {

    public enum ServerType {
@ -42,7 +44,7 @@ public class ProctoringSettings implements Entity {
    public final ServerType serverType;

    @JsonProperty(ATTR_SERVER_URL)
-    @URL(message = "examProctoring:serverURL:invalidURL")
+    @URL(message = "proctoringSettings:serverURL:invalidURL")
    public final String serverURL;

    @JsonProperty(ATTR_APP_KEY)
--- a/src/main/java/ch/ethz/seb/sebserver/gui/content/ExamForm.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/content/ExamForm.java
@ -33,6 +33,7 @@ import ch.ethz.seb.sebserver.gbl.model.Domain;
 import ch.ethz.seb.sebserver.gbl.model.EntityKey;
 import ch.ethz.seb.sebserver.gbl.model.exam.Exam;
 import ch.ethz.seb.sebserver.gbl.model.exam.Exam.ExamStatus;
+import ch.ethz.seb.sebserver.gbl.model.exam.ProctoringSettings;
 import ch.ethz.seb.sebserver.gbl.model.exam.QuizData;
 import ch.ethz.seb.sebserver.gbl.model.institution.LmsSetupTestResult;
 import ch.ethz.seb.sebserver.gbl.model.institution.LmsSetupTestResult.ErrorType;
@ -57,6 +58,7 @@ import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.RestService;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.CheckExamConsistency;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.CheckSEBRestriction;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.GetExam;
+import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.GetProctoringSettings;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.SaveExam;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.lmssetup.GetLmsSetup;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.lmssetup.TestLmsSetup;
@ -119,6 +121,7 @@ public class ExamForm implements TemplateComposer {
    private final PageService pageService;
    private final ResourceService resourceService;
    private final ExamSEBRestrictionSettings examSEBRestrictionSettings;
+    private final ExamProctoringSettings examProctoringSettings;
    private final WidgetFactory widgetFactory;
    private final RestService restService;
    private final ExamDeletePopup examDeletePopup;
@ -128,6 +131,7 @@ public class ExamForm implements TemplateComposer {
    protected ExamForm(
            final PageService pageService,
            final ExamSEBRestrictionSettings examSEBRestrictionSettings,
+            final ExamProctoringSettings examProctoringSettings,
            final ExamToConfigBindingForm examToConfigBindingForm,
            final DownloadService downloadService,
            final ExamDeletePopup examDeletePopup,
@ -137,6 +141,7 @@ public class ExamForm implements TemplateComposer {
        this.pageService = pageService;
        this.resourceService = pageService.getResourceService();
        this.examSEBRestrictionSettings = examSEBRestrictionSettings;
+        this.examProctoringSettings = examProctoringSettings;
        this.widgetFactory = pageService.getWidgetFactory();
        this.restService = this.resourceService.getRestService();
        this.examDeletePopup = examDeletePopup;
@ -336,6 +341,13 @@ public class ExamForm implements TemplateComposer {
                        ? this.restService.getRestCall(ImportAsExam.class)
                        : this.restService.getRestCall(SaveExam.class));

+        final boolean proctoringEnabled = this.restService
+                .getBuilder(GetProctoringSettings.class)
+                .withURIVariable(API.PARAM_MODEL_ID, entityKey.modelId)
+                .call()
+                .map(ProctoringSettings::getEnableProctoring)
+                .getOr(false);
+
        final PageActionBuilder actionBuilder = this.pageService.pageActionBuilder(formContext
                .clearEntityKeys()
                .removeAttribute(AttributeKeys.IMPORT_FROM_QUIZ_DATA));
@ -384,6 +396,18 @@ public class ExamForm implements TemplateComposer {
                .publishIf(() -> sebRestrictionAvailable && readonly && modifyGrant && !importFromQuizData
                        && BooleanUtils.isTrue(isRestricted))

+                .newAction(ActionDefinition.EXAM_PROCTORING_ON)
+                .withEntityKey(entityKey)
+                .withExec(this.examProctoringSettings.settingsFunction(this.pageService))
+                .noEventPropagation()
+                .publishIf(() -> proctoringEnabled && readonly)
+
+                .newAction(ActionDefinition.EXAM_PROCTORING_OFF)
+                .withEntityKey(entityKey)
+                .withExec(this.examProctoringSettings.settingsFunction(this.pageService))
+                .noEventPropagation()
+                .publishIf(() -> !proctoringEnabled && readonly)
+
                .newAction(ActionDefinition.EXAM_DELETE)
                .withEntityKey(entityKey)
                .withExec(this.examDeletePopup.deleteWizardFunction(pageContext))
--- a/src/main/java/ch/ethz/seb/sebserver/gui/content/ExamProctoringSettings.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/content/ExamProctoringSettings.java
@ -16,12 +16,16 @@ import org.apache.commons.lang3.BooleanUtils;
 import org.eclipse.swt.widgets.Composite;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
+import org.springframework.context.annotation.Lazy;
+import org.springframework.stereotype.Component;

 import ch.ethz.seb.sebserver.gbl.api.API;
 import ch.ethz.seb.sebserver.gbl.model.EntityKey;
 import ch.ethz.seb.sebserver.gbl.model.exam.ProctoringSettings;
 import ch.ethz.seb.sebserver.gbl.model.exam.ProctoringSettings.ServerType;
+import ch.ethz.seb.sebserver.gbl.profile.GuiProfile;
 import ch.ethz.seb.sebserver.gbl.util.Utils;
+import ch.ethz.seb.sebserver.gui.content.action.ActionDefinition;
 import ch.ethz.seb.sebserver.gui.form.Form;
 import ch.ethz.seb.sebserver.gui.form.FormBuilder;
 import ch.ethz.seb.sebserver.gui.form.FormHandle;
@ -30,12 +34,16 @@ import ch.ethz.seb.sebserver.gui.service.i18n.LocTextKey;
 import ch.ethz.seb.sebserver.gui.service.page.ModalInputDialogComposer;
 import ch.ethz.seb.sebserver.gui.service.page.PageContext;
 import ch.ethz.seb.sebserver.gui.service.page.PageService;
+import ch.ethz.seb.sebserver.gui.service.page.event.ActionEvent;
 import ch.ethz.seb.sebserver.gui.service.page.impl.ModalInputDialog;
 import ch.ethz.seb.sebserver.gui.service.page.impl.PageAction;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.RestService;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.GetProctoringSettings;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.SaveProctoringSettings;

+@Lazy
+@Component
+@GuiProfile
 public class ExamProctoringSettings {

    private static final Logger log = LoggerFactory.getLogger(ExamProctoringSettings.class);
@ -55,10 +63,6 @@ public class ExamProctoringSettings {
    private final static LocTextKey SEB_PROCTORING_FORM_SECRET =
            new LocTextKey("sebserver.exam.proctoring.form.secret");

-    public ExamProctoringSettings() {
-        // TODO Auto-generated constructor stub
-    }
-
    Function<PageAction, PageAction> settingsFunction(final PageService pageService) {

        return action -> {
@ -75,7 +79,7 @@ public class ExamProctoringSettings {
                    pageService,
                    action.pageContext());

-            final Predicate<FormHandle<?>> doBind = formHandle -> doCreate(
+            final Predicate<FormHandle<?>> doBind = formHandle -> doSaveSettings(
                    pageService,
                    pageContext,
                    formHandle);
@ -90,7 +94,7 @@ public class ExamProctoringSettings {
        };
    }

-    private boolean doCreate(
+    private boolean doSaveSettings(
            final PageService pageService,
            final PageContext pageContext,
            final FormHandle<?> formHandle) {
@ -105,6 +109,8 @@ public class ExamProctoringSettings {
        ProctoringSettings examProctoring = null;
        try {
            final Form form = formHandle.getForm();
+            form.clearErrors();
+
            final boolean enabled = BooleanUtils.toBoolean(
                    form.getFieldValue(ProctoringSettings.ATTR_ENABLE_PROCTORING));
            final ServerType serverType = ServerType.valueOf(
@ -126,7 +132,7 @@ public class ExamProctoringSettings {
            return false;
        }

-        return !pageService
+        final boolean saveOk = !pageService
                .getRestService()
                .getBuilder(SaveProctoringSettings.class)
                .withURIVariable(API.PARAM_MODEL_ID, entityKey.modelId)
@ -134,6 +140,19 @@ public class ExamProctoringSettings {
                .call()
                .onError(formHandle::handleError)
                .hasError();
+
+        if (saveOk) {
+            final PageAction action = pageService.pageActionBuilder(pageContext)
+                    .newAction(ActionDefinition.EXAM_VIEW_FROM_LIST)
+                    .create();
+
+            pageService.firePageEvent(
+                    new ActionEvent(action),
+                    action.pageContext());
+            return true;
+        }
+
+        return false;
    }

    private final class SEBProctoringPropertiesForm
@ -196,9 +215,24 @@ public class ExamProctoringSettings {
                            ProctoringSettings.ATTR_SERVER_TYPE,
                            SEB_PROCTORING_FORM_TYPE,
                            proctoringSettings.serverType.name(),
-                            this.pageService.getResourceService()::examProctoringTypeResources))
+                            resourceService::examProctoringTypeResources))

-                    // TODO
+                    .addField(FormBuilder.text(
+                            ProctoringSettings.ATTR_SERVER_URL,
+                            SEB_PROCTORING_FORM_URL,
+                            proctoringSettings.serverURL))
+
+                    .addField(FormBuilder.text(
+                            ProctoringSettings.ATTR_APP_KEY,
+                            SEB_PROCTORING_FORM_APPKEY,
+                            proctoringSettings.appKey))
+
+                    .addField(FormBuilder.password(
+                            ProctoringSettings.ATTR_APP_SECRET,
+                            SEB_PROCTORING_FORM_SECRET,
+                            (proctoringSettings.appSecret != null)
+                                    ? String.valueOf(proctoringSettings.appSecret)
+                                    : null))

                    .build();

--- a/src/main/java/ch/ethz/seb/sebserver/gui/content/MonitoringClientConnection.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/content/MonitoringClientConnection.java
@ -24,6 +24,7 @@ import ch.ethz.seb.sebserver.gbl.model.Domain;
 import ch.ethz.seb.sebserver.gbl.model.EntityKey;
 import ch.ethz.seb.sebserver.gbl.model.exam.Exam;
 import ch.ethz.seb.sebserver.gbl.model.exam.Indicator;
+import ch.ethz.seb.sebserver.gbl.model.exam.ProctoringSettings;
 import ch.ethz.seb.sebserver.gbl.model.session.ClientConnection.ConnectionStatus;
 import ch.ethz.seb.sebserver.gbl.model.session.ClientConnectionData;
 import ch.ethz.seb.sebserver.gbl.model.session.ClientEvent;
@ -45,8 +46,10 @@ import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.RestCall;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.RestService;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.GetExam;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.GetIndicators;
+import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.exam.GetProctoringSettings;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.logs.GetExtendedClientEventPage;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.session.GetClientConnectionData;
+import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.session.GetProctorURLForClient;
 import ch.ethz.seb.sebserver.gui.service.remote.webservice.auth.CurrentUser;
 import ch.ethz.seb.sebserver.gui.service.session.ClientConnectionDetails;
 import ch.ethz.seb.sebserver.gui.service.session.InstructionProcessor;
@ -237,6 +240,13 @@ public class MonitoringClientConnection implements TemplateComposer {

                .compose(pageContext.copyOf(content));

+        final boolean proctoringEnabled = restService
+                .getBuilder(GetProctoringSettings.class)
+                .withURIVariable(API.PARAM_MODEL_ID, parentEntityKey.modelId)
+                .call()
+                .map(ProctoringSettings::getEnableProctoring)
+                .getOr(false);
+
        actionBuilder
                .newAction(ActionDefinition.MONITOR_EXAM_BACK_TO_OVERVIEW)
                .withEntityKey(parentEntityKey)
@ -256,15 +266,16 @@ public class MonitoringClientConnection implements TemplateComposer {
                        connectionData.clientConnection.status == ConnectionStatus.ACTIVE)

                .newAction(ActionDefinition.MONITOR_EXAM_CLIENT_CONNECTION_PROCTORING)
-                .withExec(this::openProctorScreen)
+                .withEntityKey(parentEntityKey)
+                .withExec(action -> this.openProctorScreen(action, connectionToken))
                .noEventPropagation()
-                .publish()
+                .publishIf(() -> proctoringEnabled)

        ;

    }

-    private PageAction openProctorScreen(final PageAction action) {
+    private PageAction openProctorScreen(final PageAction action, final String connectionToken) {
 //
 //        final ProctorDialog dialog = new ProctorDialog(action.pageContext().getParent().getShell());
 //        dialog.open(EVENT_LIST_TITLE_KEY,
@ -274,6 +285,12 @@ public class MonitoringClientConnection implements TemplateComposer {
 //        urlLauncher.openURL(
 //                "https://seb-jitsi.ethz.ch/TestRoomABC?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJjb250ZXh0Ijp7InVzZXIiOnsiYXZhdGFyIjoiaHR0cHM6Ly9leGFtcGxlLmNvbS9qb2huLWRvZSIsIm5hbWUiOiJEaXNwbGF5IE5hbWUiLCJlbWFpbCI6Im5hbWVAZXhhbXBsZS5jb20ifX0sImF1ZCI6InNlYi1qaXRzaSIsImlzcyI6InNlYi1qaXRzaSIsInN1YiI6Im1lZXQuaml0c2kiLCJyb29tIjoiKiJ9.SD9Zs78mMFqxS1tpalPTykYYaubIYsj_406WAOhcqxQ");

+        final String proctorURL = this.pageService.getRestService().getBuilder(GetProctorURLForClient.class)
+                .withURIVariable(API.PARAM_MODEL_ID, action.getEntityKey().modelId)
+                .withURIVariable(API.EXAM_API_SEB_CONNECTION_TOKEN, connectionToken)
+                .call()
+                .getOrThrow();
+
        final JavaScriptExecutor javaScriptExecutor = RWT.getClient().getService(JavaScriptExecutor.class);
        javaScriptExecutor.execute(
                "window.open("
--- a/src/main/java/ch/ethz/seb/sebserver/gui/content/action/ActionDefinition.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/content/action/ActionDefinition.java
@ -297,6 +297,16 @@ public enum ActionDefinition {
            ImageIcon.LOCK,
            PageStateDefinitionImpl.EXAM_VIEW,
            ActionCategory.FORM),
+    EXAM_PROCTORING_ON(
+            new LocTextKey("sebserver.exam.proctoring.actions.open"),
+            ImageIcon.VISIBILITY,
+            PageStateDefinitionImpl.EXAM_VIEW,
+            ActionCategory.FORM),
+    EXAM_PROCTORING_OFF(
+            new LocTextKey("sebserver.exam.proctoring.actions.open"),
+            ImageIcon.VISIBILITY_OFF,
+            PageStateDefinitionImpl.EXAM_VIEW,
+            ActionCategory.FORM),

    EXAM_CONFIGURATION_NEW(
            new LocTextKey("sebserver.exam.configuration.action.list.new"),
--- a/src/main/java/ch/ethz/seb/sebserver/gui/service/ResourceService.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/service/ResourceService.java
@ -39,6 +39,7 @@ import ch.ethz.seb.sebserver.gbl.model.exam.ExamConfigurationMap;
 import ch.ethz.seb.sebserver.gbl.model.exam.Indicator.IndicatorType;
 import ch.ethz.seb.sebserver.gbl.model.exam.OpenEdxSEBRestriction.PermissionComponent;
 import ch.ethz.seb.sebserver.gbl.model.exam.OpenEdxSEBRestriction.WhiteListPath;
+import ch.ethz.seb.sebserver.gbl.model.exam.ProctoringSettings.ServerType;
 import ch.ethz.seb.sebserver.gbl.model.institution.LmsSetup.LmsType;
 import ch.ethz.seb.sebserver.gbl.model.sebconfig.AttributeType;
 import ch.ethz.seb.sebserver.gbl.model.sebconfig.ConfigurationNode;
@ -372,7 +373,7 @@ public class ResourceService {
    }

    public List<Tuple<String>> examProctoringTypeResources() {
-        return Arrays.stream(ExamType.values())
+        return Arrays.stream(ServerType.values())
                .map(type -> new Tuple3<>(
                        type.name(),
                        this.i18nSupport.getText(EXAM_PROCTORING_TYPE_PREFIX + type.name()),
--- a/src/main/java/ch/ethz/seb/sebserver/gui/service/remote/webservice/api/exam/SaveProctoringSettings.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/service/remote/webservice/api/exam/SaveProctoringSettings.java
@ -36,7 +36,7 @@ public class SaveProctoringSettings extends RestCall<Exam> {
                MediaType.APPLICATION_JSON_UTF8,
                API.EXAM_ADMINISTRATION_ENDPOINT
                        + API.MODEL_ID_VAR_PATH_SEGMENT
-                        + API.EXAM_ADMINISTRATION_SEB_RESTRICTION_PATH_SEGMENT);
+                        + API.EXAM_ADMINISTRATION_PROCTOR_PATH_SEGMENT);
    }

 }
--- a/src/main/java/ch/ethz/seb/sebserver/gui/service/remote/webservice/api/session/GetProctorURLForClient.java
+++ b/src/main/java/ch/ethz/seb/sebserver/gui/service/remote/webservice/api/session/GetProctorURLForClient.java
@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET)
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package ch.ethz.seb.sebserver.gui.service.remote.webservice.api.session;
+
+import org.springframework.context.annotation.Lazy;
+import org.springframework.http.HttpMethod;
+import org.springframework.http.MediaType;
+import org.springframework.stereotype.Component;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+
+import ch.ethz.seb.sebserver.gbl.api.API;
+import ch.ethz.seb.sebserver.gbl.api.EntityType;
+import ch.ethz.seb.sebserver.gbl.profile.GuiProfile;
+import ch.ethz.seb.sebserver.gui.service.remote.webservice.api.RestCall;
+
+@Lazy
+@Component
+@GuiProfile
+public class GetProctorURLForClient extends RestCall<String> {
+
+    public GetProctorURLForClient() {
+        super(new TypeKey<>(
+                CallType.GET_SINGLE,
+                EntityType.EXAM_PROCTOR_DATA,
+                new TypeReference<String>() {
+                }),
+                HttpMethod.GET,
+                MediaType.APPLICATION_JSON_UTF8,
+                API.EXAM_ADMINISTRATION_ENDPOINT
+                        + API.MODEL_ID_VAR_PATH_SEGMENT
+                        + API.EXAM_ADMINISTRATION_PROCTOR_PATH_SEGMENT
+                        + API.EXAM_MONITORING_SEB_CONNECTION_TOKEN_PATH_SEGMENT);
+    }
+
+}
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/validation/ProctoringSettingsValidator.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/validation/ProctoringSettingsValidator.java
@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET)
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package ch.ethz.seb.sebserver.webservice.servicelayer.validation;
+
+import java.net.InetAddress;
+import java.net.URI;
+
+import javax.validation.ConstraintValidator;
+import javax.validation.ConstraintValidatorContext;
+
+import org.apache.commons.lang3.StringUtils;
+
+import ch.ethz.seb.sebserver.gbl.model.exam.ProctoringSettings;
+import ch.ethz.seb.sebserver.gbl.model.exam.ProctoringSettings.ServerType;
+
+public class ProctoringSettingsValidator implements ConstraintValidator<ValidProctoringSettings, ProctoringSettings> {
+
+    @Override
+    public boolean isValid(final ProctoringSettings value, final ConstraintValidatorContext context) {
+        if (value == null) {
+            return false;
+        }
+
+        if (value.enableProctoring) {
+            if (value.serverType == ServerType.JITSI_MEET) {
+                boolean passed = true;
+                if (StringUtils.isBlank(value.serverURL)) {
+                    context.disableDefaultConstraintViolation();
+                    context
+                            .buildConstraintViolationWithTemplate("proctoringSettings:serverURL:notNull")
+                            .addPropertyNode("serverURL").addConstraintViolation();
+                    passed = false;
+                }
+
+                try {
+
+                    if (!InetAddress.getByName(new URI(value.serverURL).getHost()).isReachable(5000)) {
+                        context.disableDefaultConstraintViolation();
+                        context
+                                .buildConstraintViolationWithTemplate("proctoringSettings:serverURL:serverNotAvailable")
+                                .addPropertyNode("serverURL").addConstraintViolation();
+                        passed = false;
+                    }
+                } catch (final Exception e) {
+                    context.disableDefaultConstraintViolation();
+                    context
+                            .buildConstraintViolationWithTemplate("proctoringSettings:serverURL:serverNotAvailable")
+                            .addPropertyNode("serverURL").addConstraintViolation();
+                    passed = false;
+                }
+
+                if (StringUtils.isBlank(value.appKey)) {
+                    context.disableDefaultConstraintViolation();
+                    context
+                            .buildConstraintViolationWithTemplate("proctoringSettings:appKey:notNull")
+                            .addPropertyNode("appKey").addConstraintViolation();
+                    passed = false;
+                }
+
+                if (StringUtils.isBlank(value.appSecret)) {
+                    context.disableDefaultConstraintViolation();
+                    context
+                            .buildConstraintViolationWithTemplate("proctoringSettings:appSecret:notNull")
+                            .addPropertyNode("appSecret").addConstraintViolation();
+                    passed = false;
+                }
+
+                return passed;
+            }
+        }
+
+        return true;
+    }
+
+}
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/validation/ValidProctoringSettings.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/servicelayer/validation/ValidProctoringSettings.java
@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2020 ETH Zürich, Educational Development and Technology (LET)
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+package ch.ethz.seb.sebserver.webservice.servicelayer.validation;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+import javax.validation.Constraint;
+import javax.validation.Payload;
+
+@Target({ ElementType.TYPE })
+@Retention(RetentionPolicy.RUNTIME)
+@Constraint(validatedBy = ProctoringSettingsValidator.class)
+@Documented
+public @interface ValidProctoringSettings {
+
+    String message() default "{mandatoryWhenEnabled}";
+
+    Class<?>[] groups() default {};
+
+    Class<? extends Payload>[] payload() default {};
+
+}
--- a/src/main/java/ch/ethz/seb/sebserver/webservice/weblayer/api/ExamAdministrationController.java
+++ b/src/main/java/ch/ethz/seb/sebserver/webservice/weblayer/api/ExamAdministrationController.java
@ -429,7 +429,7 @@ public class ExamAdministrationController extends EntityController<Exam, Exam> {
                    + API.EXAM_ADMINISTRATION_PROCTOR_PATH_SEGMENT
                    + API.EXAM_MONITORING_SEB_CONNECTION_TOKEN_PATH_SEGMENT,
            method = RequestMethod.GET,
-            produces = MediaType.APPLICATION_JSON_UTF8_VALUE)
+            produces = MediaType.TEXT_PLAIN_VALUE)
    public String getExamProctoringURL(
            @RequestParam(
                    name = API.PARAM_INSTITUTION_ID,
--- a/src/main/resources/messages.properties
+++ b/src/main/resources/messages.properties
@ -90,6 +90,7 @@ sebserver.form.validation.fieldError.password.mismatch=The retyped password does
 sebserver.form.validation.fieldError.invalidURL=The input does not match the URL pattern.
 sebserver.form.validation.fieldError.exists=This name already exists. Please choose another one.
 sebserver.form.validation.fieldError.email=Invalid mail address
+sebserver.form.validation.fieldError.serverNotAvailable=No service seems to be available within the given URL
 sebserver.error.unexpected=Unexpected Error
 sebserver.page.message=Information
 sebserver.dialog.confirm.title=Confirmation
@ -1396,6 +1397,7 @@ sebserver.monitoring.exam.connection.action.hide.disabled=Hide Canceled
 sebserver.monitoring.exam.connection.action.show.disabled=Show Canceled
 sebserver.monitoring.exam.connection.action.hide.undefined=Hide Undefined
 sebserver.monitoring.exam.connection.action.show.undefined=Show Undefined
+sebserver.monitoring.exam.connection.action.proctoring=Proctoring

 sebserver.monitoring.exam.connection.eventlist.title=Events
 sebserver.monitoring.exam.connection.eventlist.title.tooltip=All events and logs sent by the SEB Client