Vue

Follow these steps to get started with Vue.

Set up the workspace by running the following command:

npm create vue@latest livenesstest

A folder/directory named livenesstest should appear and the folder/ directory structure should look like this:

livenesstest/
    |
    +-- node_modules/
    |
    +-- public/
    |    |
    |    \-- vite.svg
    |
    +-- src/
    |    |
    |    +-- assets\
    |    |
    |    +-- components\
    |    |
    |    +-- App.vue
    |    |
    |    +-- main.js
    |    |
    |    \-- style.css
    |
    +-- .gitignore
    |
    +-- index.html
    |
    +-- vite.config.js
    |
    +-- package-lock.json
    |
    +-- package.json
    |
    \-- README.md

Put the liveness folder/directory that contains the liveness engine and builders like builder.js, into the public folder/directory.
Add the liveness package to package.json by running this command in the livenesstest Vue project.
```
npm i file:public/liveness
```
This will add @verihubs/liveness dependency in package.json.
Create new file with name useLiveness.ts inside src folder.
```
touch src/useLiveness.ts
```

Add the following code to the useLiveness.ts file inside src folder.

import { onBeforeUnmount, onMounted, ref } from "vue";
import Builder from "@verihubs/liveness";

export function useLivenessSDK() {
  const image = ref("");
  const result = ref("");
  const error = ref<string | null>(null);

  let sdk: ReturnType<Builder["build"]> | null = null;

  const start = () => {
    sdk?.start();
  };

  const destroy = () => {
    sdk?.destroy();
  };

  const handleMessage = ({
    data: { data, subject },
  }: {
    // eslint-disable-next-line @typescript-eslint/no-explicit-any
    data: { data: any; subject: string };
  }) => {
    switch (subject) {
      case "Verification.Verbose":
        console.log("[Verbose]", data);
        break;

      case "Camera.NotAllowed":
      case "Camera.NotFound":
      case "Camera.PermissionDenied":
      case "ScreenOrientation.NotAllowed":
      case "Verification.Disrupted":
      case "Verification.Timeout":
        console.log({ data, subject });
        error.value = subject;
        alert(subject);
        destroy();
        break;

      case "Verification.Success": {
        window.setTimeout(() => {
          image.value = `data:image/png;base64,${data.image.url}`;
          result.value = JSON.stringify(data, undefined, 2);
          destroy();
        }, 1500);

        break;
      }

      default:
        console.log({ data, subject });
        error.value = subject;
        break;
    }
  };

  onMounted(() => {
    sdk = new Builder()
      .setInstruction(["look_left", "look_right"], {
        commands: ["open_mouth"],
        seedLimit: 1,
      })
      .setProxyMiddleware({
        PassiveLiveness: {
          url: "http://localhost:8888/liveness/face",
          headers: {
            "App-ID": "<replace-me-with-app-id>",
            "API-Key": "<replace-me-with-api-key>",
          },
        },
        License: {
          url: "http://localhost:8888/license/{license_id}/check",
          headers: {
            "App-ID": "<replace-me-with-app-id>",
            "API-Key": "<replace-me-with-api-key>",
          },
        },
      })
      .setTimeout(60000)
      .setURL("./liveness")
      .setVirtualCameraLabel(["OBS", "Virtual"])
      .build();

    window.addEventListener("message", handleMessage);
  });

  onBeforeUnmount(() => {
    window.removeEventListener("message", handleMessage);

    sdk?.destroy();
    sdk = null;
  });

  return {
    image,
    result,
    error,
    start,
    destroy,
  };
}

Replace proxy middleware URLs with a URL that points to the correct endoints, and replace <replace-me-with-app-id> and <replace-me-with-api-key> with the appropriate APP-ID and APIKey for the passive liveness (remove the headers if the api doesn't need credentials or the url is pointing towards an intermediate endpoint).

🚧
Look Out!
To not accidentally leak of AppID and APIKey for passive liveness, always pass them to an intermediate endpoint (like a proxy middleware) and append the AppID and APIKey header before reaching Verihubs' passive liveness service in production. Additional data can also be passed to this intermediate endpoint for end user identification.
For more information about creating a Proxy Middleware, refer to Proxy Middleware.
For API documentation of the Builder, refer to Builder.

📘
Info
Check System Messages for full system message references.

Replace App.vue with code below:

<script setup lang="ts">
import { useLivenessSDK } from './useLiveness';

const { image, result, error, start } = useLivenessSDK();
</script>

<template>
  <main>
    <button type="button" @click="start">
      Run Liveness Verification
    </button>

    <p v-if="error">
      {{ error }}
    </p>

    <img
      v-if="image"
      :src="image"
      alt="Liveness result"
    />

    <pre v-if="result">{{ result }}</pre>
  </main>
</template>

<style scoped>
pre {
  font-family: 'Courier New', Courier, monospace;
  white-space: pre-wrap;
  background-color: #0002;
  overflow: auto;
}
</style>

Add the dependency to optimizeDeps.include and build.commonjsOptions.include in Vite.config.js with code below:

export default defineConfig({
  plugins: [vue()],
  optimizeDeps: {
    include: ["@verihubs/liveness"],
  },
  build: {
    commonjsOptions: {
      include: [/liveness/, /node_modules/],
    },
  },
});

To try the above implementation you can run the following command from the liveness project:

npm run dev