Add http and https proxy feature

Added new proxy feature based on http and https proxy agents.
Proxy feature works like notifications, there is many proxy
could be related one proxy entry.

Supported features
- Proxies can activate and disable in bulk
- Proxies auto enabled by default for new monitors
- Proxies could be applied in bulk to current monitors
- Both authenticated and anonymous proxies supported
- Export and import support for proxies

src/components/ProxyDialog.vue

@@ -0,0 +1,203 @@
+<template>
+    <form @submit.prevent="submit">
+        <div ref="modal" class="modal fade" tabindex="-1" data-bs-backdrop="static">
+            <div class="modal-dialog">
+                <div class="modal-content">
+                    <div class="modal-header">
+                        <h5 id="exampleModalLabel" class="modal-title">
+                            {{ $t("Setup Proxy") }}
+                        </h5>
+                        <button type="button" class="btn-close" data-bs-dismiss="modal" aria-label="Close" />
+                    </div>
+                    <div class="modal-body">
+                        <div class="mb-3">
+                            <label for="proxy-protocol" class="form-label">{{ $t("Proxy Protocol") }}</label>
+                            <select id="proxy-protocol" v-model="proxy.protocol" class="form-select">
+                                <option value="https">HTTPS</option>
+                                <option value="http">HTTP</option>
+                            </select>
+                        </div>
+
+                        <div class="mb-3">
+                            <label for="proxy-host" class="form-label">{{ $t("Proxy Server") }}</label>
+                            <div class="d-flex">
+                                <input id="proxy-host" v-model="proxy.host" type="text" class="form-control" required :placeholder="$t('Server Address')">
+                                <input v-model="proxy.port" type="number" class="form-control ms-2" style="width: 100px" required min="1" max="65535" :placeholder="$t('Port')">
+                            </div>
+                        </div>
+
+                        <div class="mb-3">
+                            <div class="form-check form-switch">
+                                <input id="mark-auth" v-model="proxy.auth" class="form-check-input" type="checkbox">
+                                <label for="mark-auth" class="form-check-label">{{ $t("Proxy server has authentication") }}</label>
+                            </div>
+                        </div>
+
+                        <div v-if="proxy.auth" class="mb-3">
+                            <label for="proxy-username" class="form-label">{{ $t("User") }}</label>
+                            <input id="proxy-username" v-model="proxy.username" type="text" class="form-control" required>
+                        </div>
+
+                        <div v-if="proxy.auth" class="mb-3">
+                            <label for="proxy-password" class="form-label">{{ $t("Password") }}</label>
+                            <input id="proxy-password" v-model="proxy.password" type="text" class="form-control" required>
+                        </div>
+
+                        <div class="mb-3 mt-4">
+                            <hr class="dropdown-divider mb-4">
+
+                            <div class="form-check form-switch">
+                                <input id="mark-active" v-model="proxy.active" class="form-check-input" type="checkbox">
+                                <label for="mark-active" class="form-check-label">{{ $t("enabled") }}</label>
+                            </div>
+                            <div class="form-text">
+                                {{ $t("enableProxyDescription") }}
+                            </div>
+
+                            <br />
+
+                            <div class="form-check form-switch">
+                                <input id="mark-default" v-model="proxy.default" class="form-check-input" type="checkbox">
+                                <label for="mark-default" class="form-check-label">{{ $t("setAsDefault") }}</label>
+                            </div>
+                            <div class="form-text">
+                                {{ $t("setAsDefaultProxyDescription") }}
+                            </div>
+
+                            <br />
+
+                            <div class="form-check form-switch">
+                                <input id="apply-existing" v-model="proxy.applyExisting" class="form-check-input" type="checkbox">
+                                <label class="form-check-label" for="apply-existing">{{ $t("Apply on all existing monitors") }}</label>
+                            </div>
+                        </div>
+                    </div>
+
+                    <div class="modal-footer">
+                        <button v-if="id" type="button" class="btn btn-danger" :disabled="processing" @click="deleteConfirm">
+                            {{ $t("Delete") }}
+                        </button>
+                        <button type="submit" class="btn btn-primary" :disabled="processing">
+                            <div v-if="processing" class="spinner-border spinner-border-sm me-1"></div>
+                            {{ $t("Save") }}
+                        </button>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </form>
+
+    <Confirm ref="confirmDelete" btn-style="btn-danger" :yes-text="$t('Yes')" :no-text="$t('No')" @yes="deleteProxy">
+        {{ $t("deleteProxyMsg") }}
+    </Confirm>
+</template>
+
+<script lang="ts">
+import { Modal } from "bootstrap";
+
+import Confirm from "./Confirm.vue";
+
+export default {
+    components: {
+        Confirm,
+    },
+    props: {},
+    emits: ["added"],
+    data() {
+        return {
+            model: null,
+            processing: false,
+            id: null,
+            proxy: {
+                protocol: null,
+                host: null,
+                port: null,
+                auth: false,
+                username: null,
+                password: null,
+                active: false,
+                default: false,
+                applyExisting: false,
+            }
+        };
+    },
+
+    mounted() {
+        this.modal = new Modal(this.$refs.modal);
+    },
+
+    methods: {
+        deleteConfirm() {
+            this.modal.hide();
+            this.$refs.confirmDelete.show();
+        },
+
+        show(proxyID) {
+            if (proxyID) {
+                this.id = proxyID;
+
+                for (let proxy of this.$root.proxyList) {
+                    if (proxy.id === proxyID) {
+                        this.proxy = proxy;
+                        break;
+                    }
+                }
+            } else {
+                this.id = null;
+                this.proxy = {
+                    protocol: "https",
+                    host: null,
+                    port: null,
+                    auth: false,
+                    username: null,
+                    password: null,
+                    active: true,
+                    default: false,
+                    applyExisting: false,
+                };
+            }
+
+            this.modal.show();
+        },
+
+        submit() {
+            this.processing = true;
+            this.$root.getSocket().emit("addProxy", this.proxy, this.id, (res) => {
+                this.$root.toastRes(res);
+                this.processing = false;
+
+                if (res.ok) {
+                    this.modal.hide();
+
+                    // Emit added event, doesn't emit edit.
+                    if (! this.id) {
+                        this.$emit("added", res.id);
+                    }
+                }
+            });
+        },
+
+        deleteProxy() {
+            this.processing = true;
+            this.$root.getSocket().emit("deleteProxy", this.id, (res) => {
+                this.$root.toastRes(res);
+                this.processing = false;
+
+                if (res.ok) {
+                    this.modal.hide();
+                }
+            });
+        },
+    },
+};
+</script>
+
+<style lang="scss" scoped>
+@import "../assets/vars.scss";
+
+.dark {
+    .modal-dialog .form-text, .modal-dialog p {
+        color: $dark-font-color;
+    }
+}
+</style>

src/components/settings/Proxies.vue

@@ -0,0 +1,47 @@
+<template>
+    <div>
+        <!-- Proxies -->
+        <div class="proxy-list my-4">
+            <p v-if="$root.proxyList.length === 0">
+                {{ $t("Not available, please setup.") }}
+            </p>
+            <p v-else>
+                {{ $t("proxyDescription") }}
+            </p>
+
+            <ul class="list-group mb-3" style="border-radius: 1rem;">
+                <li v-for="(proxy, index) in $root.proxyList" :key="index" class="list-group-item">
+                    {{ proxy.host }}<span v-if="proxy.default === true" class="badge bg-primary ms-2">{{ $t("Default") }}</span><br>
+                    <a href="#" @click="$refs.proxyDialog.show(proxy.id)">{{ $t("Edit") }}</a>
+                </li>
+            </ul>
+
+            <button class="btn btn-primary me-2" type="button" @click="$refs.proxyDialog.show()">
+                {{ $t("Setup Proxy") }}
+            </button>
+        </div>
+
+        <ProxyDialog ref="proxyDialog" />
+    </div>
+</template>
+
+<script>
+import ProxyDialog from "../../components/ProxyDialog.vue";
+
+export default {
+    components: {
+        ProxyDialog
+    },
+};
+</script>
+
+<style lang="scss" scoped>
+@import "../../assets/vars.scss";
+
+.dark {
+    .list-group-item {
+        background-color: $dark-bg2;
+        color: $dark-font-color;
+    }
+}
+</style>

src/languages/en.js

@@ -369,4 +369,12 @@ export default {
     alertaApiKey: 'API Key',
     alertaAlertState: 'Alert State',
     alertaRecoverState: 'Recover State',
+    Proxies: "Proxies",
+    default: "Default",
+    enabled: "Enabled",
+    setAsDefault: "Set As Default",
+    deleteProxyMsg: "Are you sure want to delete this proxy for all monitors?",
+    proxyDescription: "Proxies must be assigned to a monitor to function.",
+    enableProxyDescription: "This proxy will not effect on monitor requests until it is activated. You can control temporarily disable the proxy from all monitors by activation status.",
+    setAsDefaultProxyDescription: "This proxy will be enabled by default for new monitors. You can still disable the proxy separately for each monitor.",
 };

src/mixins/socket.js

@@ -33,6 +33,7 @@ export default {
             uptimeList: { },
             tlsInfoList: {},
             notificationList: [],
+            proxyList: [],
             connectionErrorMsg: "Cannot connect to the socket server. Reconnecting...",
         };
     },
@@ -103,6 +104,16 @@ export default {
                 this.notificationList = data;
             });
 
+            socket.on("proxyList", (data) => {
+                this.proxyList = data.map(item => {
+                    item.auth = !!item.auth;
+                    item.active = !!item.active;
+                    item.default = !!item.default;
+
+                    return item;
+                });
+            });
+
             socket.on("heartbeat", (data) => {
                 if (! (data.monitorID in this.heartbeatList)) {
                     this.heartbeatList[data.monitorID] = [];

src/pages/EditMonitor.vue

@@ -222,6 +222,32 @@
                                 {{ $t("Setup Notification") }}
                             </button>
 
+                            <!-- Proxies -->
+                            <h2 class="mt-5 mb-2">{{ $t("Proxies") }}</h2>
+                            <p v-if="$root.proxyList.length === 0">
+                                {{ $t("Not available, please setup.") }}
+                            </p>
+
+                            <div v-if="$root.proxyList.length > 0" class="form-check form-switch my-3">
+                                <input id="proxy-disable" v-model="monitor.proxyId" :value="null" name="proxy" class="form-check-input" type="radio">
+                                <label class="form-check-label" for="proxy-disable">{{ $t("No Proxy") }}</label>
+                            </div>
+
+                            <div v-for="proxy in $root.proxyList" :key="proxy.id" class="form-check form-switch my-3">
+                                <input :id="`proxy-${proxy.id}`" v-model="monitor.proxyId" :value="proxy.id" name="proxy" class="form-check-input" type="radio">
+
+                                <label class="form-check-label" :for="`proxy-${proxy.id}`">
+                                    {{ proxy.host }}
+                                    <a href="#" @click="$refs.proxyDialog.show(proxy.id)">{{ $t("Edit") }}</a>
+                                </label>
+
+                                <span v-if="proxy.default === true" class="badge bg-primary ms-2">{{ $t("default") }}</span>
+                            </div>
+
+                            <button class="btn btn-primary me-2" type="button" @click="$refs.proxyDialog.show()">
+                                {{ $t("Setup Proxy") }}
+                            </button>
+
                             <!-- HTTP Options -->
                             <template v-if="monitor.type === 'http' || monitor.type === 'keyword' ">
                                 <h2 class="mt-5 mb-2">{{ $t("HTTP Options") }}</h2>
@@ -285,12 +311,14 @@
             </form>
 
             <NotificationDialog ref="notificationDialog" @added="addedNotification" />
+            <ProxyDialog ref="proxyDialog" @added="addedProxy" />
         </div>
     </transition>
 </template>
 
 <script>
 import NotificationDialog from "../components/NotificationDialog.vue";
+import ProxyDialog from "../components/ProxyDialog.vue";
 import TagsManager from "../components/TagsManager.vue";
 import CopyableInput from "../components/CopyableInput.vue";
 
@@ -302,6 +330,7 @@ const toast = useToast();
 
 export default {
     components: {
+        ProxyDialog,
         CopyableInput,
         NotificationDialog,
         TagsManager,
@@ -368,6 +397,17 @@ export default {
 
     },
     watch: {
+        "$root.proxyList"() {
+            if (this.isAdd) {
+                if (this.$root.proxyList && !this.monitor.proxyId) {
+                    const proxy = this.$root.proxyList.find(proxy => proxy.default);
+
+                    if (proxy) {
+                        this.monitor.proxyId = proxy.id;
+                    }
+                }
+            }
+        },
 
         "$route.fullPath"() {
             this.init();
@@ -439,8 +479,17 @@ export default {
                     accepted_statuscodes: ["200-299"],
                     dns_resolve_type: "A",
                     dns_resolve_server: "1.1.1.1",
+                    proxyId: null,
                 };
 
+                if (this.$root.proxyList && !this.monitor.proxyId) {
+                    const proxy = this.$root.proxyList.find(proxy => proxy.default);
+
+                    if (proxy) {
+                        this.monitor.proxyId = proxy.id;
+                    }
+                }
+
                 for (let i = 0; i < this.$root.notificationList.length; i++) {
                     if (this.$root.notificationList[i].isDefault == true) {
                         this.monitor.notificationIDList[this.$root.notificationList[i].id] = true;
@@ -532,6 +581,12 @@ export default {
         addedNotification(id) {
             this.monitor.notificationIDList[id] = true;
         },
+
+        // Added a Proxy Event
+        // Enable it if the proxy is added in EditMonitor.vue
+        addedProxy(id) {
+            this.monitor.proxyId = id;
+        },
     },
 };
 </script>

src/pages/Settings.vue

@@ -81,6 +81,9 @@ export default {
                 security: {
                     title: this.$t("Security"),
                 },
+                proxies: {
+                    title: this.$t("Proxies"),
+                },
                 backup: {
                     title: this.$t("Backup"),
                 },

src/router.js

@@ -16,6 +16,7 @@ import General from "./components/settings/General.vue";
 import Notifications from "./components/settings/Notifications.vue";
 import MonitorHistory from "./components/settings/MonitorHistory.vue";
 import Security from "./components/settings/Security.vue";
+import Proxies from "./components/settings/Proxies.vue";
 import Backup from "./components/settings/Backup.vue";
 import About from "./components/settings/About.vue";
 
@@ -88,6 +89,10 @@ const routes = [
                                 path: "security",
                                 component: Security,
                             },
+                            {
+                                path: "proxies",
+                                component: Proxies,
+                            },
                             {
                                 path: "backup",
                                 component: Backup,