Added TikTok integration

dinoosauro · Jun 27, 2024 · 5c81148 · 5c81148
1 parent f428573
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Showing 11 changed files with 492 additions and 21 deletions.
diff --git a/public/oauth.html b/public/oauth.html
@@ -0,0 +1,13 @@
+<!DOCTYPE html>
+
+<body>
+    <h1>There has been an error in the request :(</h1>
+    <script>
+        const search = new URLSearchParams(window.location.search);
+        const [code, state] = [search.get("code"), search.get("state")];
+        if (code && state) {
+            window.opener.postMessage({ code, state }, window.location.origin);
+            close();
+        }
+    </script>
+</body>
diff --git a/public/service-worker.js b/public/service-worker.js
@@ -21,9 +21,9 @@ self.addEventListener('install', e => {
     );
 });
 self.addEventListener('activate', e => self.clients.claim());
-self.addEventListener('fetch', event => {
+self.addEventListener('fetch', async (event) => {
     const req = event.request;
-    if (req.url.indexOf("updatecode") !== -1) return fetch(req); else event.respondWith(networkFirst(req));
+    if (req.url.indexOf("updatecode") !== -1 || req.url.indexOf(localStorage.getItem("ImageConverter-TikTokServer")) !== -1) event.respondWith(await fetch(req)); else event.respondWith(networkFirst(req));
 });
 
 async function networkFirst(req) {

diff --git a/server/README.md b/server/README.md
@@ -0,0 +1,62 @@
+# TikTok Server
+
+Since TikTok API requries that photo upload is done through an URL, you'll need
+a server to handle this. Here's a server example that you can use with Deno
+Deploy.
+
+## Setup:
+
+### Getting an API Key
+
+You'll need an API Key to upload content on TikTok.
+
+1. Go to the
+   [TikTok for Developers' website](https://developers.tiktok.com/apps/). You
+   might need to create an account.
+2. Go into the [Manage apps](https://developers.tiktok.com/apps/) section.
+3. Click to the "Connect an app" button, and write the app name.
+4. Now go to the "Sandbox" tab, and then click the red "Create Sandbox" button.
+   Add whatever name you like.
+5. Fill the form of the "Basic information" card. Check "Web" in the platforms.
+   Currently, don't add anything in the URLs.
+
+### Deno Deploy
+
+6. Create a new serverless project in Deno Deploy, and copy the `server.ts`
+   content.
+7. You now need to add some environment values: click on the option button (at
+   the left of the "TS" select) and write the following values
+   - `clientKey`: the Client Key that you can access from the TikTok dashboard
+     in the "Credentials" tab
+   - `clientSecret`: same as above, but for the Client Secret
+   - `denoUrl`: the URL where the Deno project is deployed. Put it without "/"
+   - `sourceUrl`: the URL where your image-converter webpage is located. Put it
+     without "/"
+8. Save the values. Copy again the URL of your Deno project, and add it where
+   required in the TikTok form.
+
+### Add the products on TikTok
+
+9. On the TikTok Developers page, click to "Add products", and choose "Login
+   Kit" and "Content Posting API"
+10. Write again the Deno URL in the "Redirect URI" textbox in the "Login Kit"
+    card
+11. Enable "Direct Post" on the "Content Posting API" card
+12. Now click on the "Verify" button of the "Content Posting API" card.
+13. Choose "sandbox1" from the "URL properties for" select, and click on "Verify
+    new property"
+14. Choose "URL prefix", write again the URL of the Deno Deploy server (this
+    time, add a "/"), and press on "Verify". Download the file.
+15. Go back to the Deno Deploy project, and add two new environment values:
+    - `tiktokVerificationFileName`: the name of the file you've downloaded (with
+      also the extension)
+    - `tiktokVerificationFileContent`: the content of the file you've downloaded
+16. Save the values. Now verify the URL on the TikTok page.
+17. In the Sandbox settings, login with your TikTok account.
+
+### Compatibility on image-converter
+
+You are now ready to use the image-converter integration to TikTok!
+
+18. On image-converter, open the settings.
+19. Write the Deno URL (with the final "/") in the "TikTok integration" card
diff --git a/server/server.ts b/server/server.ts
@@ -0,0 +1,176 @@
+
+const kv = await Deno.openKv();
+kv.listenQueue(async (value: string) => { // Time to delete the content
+    const list = (await kv.get(["availableImages", value])).value as number ?? 0; // The maximum "position" number
+    for (let i = 1; i < list + 1; i++) { // Items start to 1
+        const getBuffersAvailable = (await kv.get(["availableImages", value, i.toString()])).value as number ?? 0; // Get the number of divided buffers
+        for (let x = 0; x < getBuffersAvailable; x++) await kv.delete(["availableImages", value, i.toString(), x]); // Iterate on each buffer to delete them
+        await kv.delete(["availableImages", value, i.toString()]);
+    }
+    await kv.delete(["availableImages", value]);
+    await kv.delete(["availableIds", value]);
+})
+interface AutoResponse {
+    body?: BodyInit,
+    status?: number,
+    type?: string
+}
+interface PostRequest {
+    id: string,
+    code: string,
+    description: string,
+    title: string,
+    thumbnail: number
+}
+/**
+ * Make a Response with CORS configured
+ * @param body the body of the request
+ * @param status the status of the response
+ * @param type the "Content-Type" added in the header
+ * @returns a Response to return to the request
+ */
+function autoResponse({ body, status, type }: AutoResponse) {
+    return new Response(body, {
+        status: status,
+        headers: {
+            "Content-Type": type ?? "text/plain",
+            "Access-Control-Allow-Origin": Deno.env.get("sourceUrl") ?? "http://localhost:5173", // TODO: Change it with only the production website!
+            "Access-Control-Allow-Methods": "GET, POST",
+            "Access-Control-Allow-Headers": "Authorization",
+
+        }
+    });
+}
+/**
+ * Divide an ArrayBuffer in an array of ArrayBuffers of a smaller length, so that they can be stored on Deno KV
+ * @param buffer the buffer to divide
+ * @param chunkSize the size of the chunk
+ * @returns an ArrayBuffer[], of a fixed length
+ */
+function chunkArrayBuffer(buffer: ArrayBuffer, chunkSize: number) {
+    const chunked = [];
+    let offset = 0;
+    while (offset < buffer.byteLength) {
+        const size = Math.min(chunkSize, buffer.byteLength - offset);
+        const chunk = buffer.slice(offset, offset + size);
+        chunked.push(chunk);
+        offset += size;
+    }
+    return chunked;
+}
+/**
+ * Join multiple ArrayBuffers in a single one
+ * @param buffers the Buffers to join
+ * @returns the joined ArrayBuffer
+ */
+function joinArrayBuffers(buffers: ArrayBuffer[]) {
+    const size = buffers.reduce((acc, buffer) => acc + buffer.byteLength, 0);
+    const finalBuffer = new ArrayBuffer(size);
+    const array = new Uint8Array(finalBuffer);
+    let offset = 0;
+    for (const buffer of buffers) {
+        array.set(new Uint8Array(buffer), offset);
+        offset += buffer.byteLength;
+    }
+    return finalBuffer;
+}
+
+Deno.serve(async (req) => {
+    if (req.method.toLowerCase() === "options") return autoResponse({ body: "", status: 204 }); // Request sent by the browser for CORS. There's no need to continue.
+    let url = req.url.substring(req.url.lastIndexOf("/") + 1);
+    if (url.indexOf("?") !== -1) url = url.substring(0, url.indexOf("?"));
+    switch (url) {
+        case "getId": { // Get a random ID that'll be used for identifying the uploaded images
+            const ids = crypto.randomUUID();
+            await kv.set(["availableIds", ids], Date.now());
+            kv.enqueue(ids, { delay: 600000 }); // Delete everything after 10 minutes
+            return autoResponse({ status: 200, body: JSON.stringify({ id: ids }) });
+        }
+        case "upload": { // Upload image to the server
+            if (req.method !== "POST") return autoResponse({ body: "Endpoint available only with POST request.", status: 405 });
+            const params = new URLSearchParams(req.url.substring(req.url.indexOf("?") + 1));
+            const getPosition = params.get("position");
+            const getId = params.get("id");
+            if (getPosition && getId && !isNaN(+getPosition) && +getPosition > 0 && getPosition.indexOf(".") === -1) { // getPosition must be a positive integer, since this is the way we'll keep track of images
+                if (!(await kv.get(["availableIds", getId])).value) return autoResponse({ body: "Request expired.", status: 403 });
+                const previousPosition = (await kv.get(["availableImages", getId])).value as number ?? 0;
+                const buffer = chunkArrayBuffer(await new Response(req.body).arrayBuffer(), 50 * 1024); // Divide the buffers with a maximum size of 50kb so that they can be stored in Deno KV.
+                await kv.set(["availableImages", getId, getPosition], buffer.length);
+                for (let i = 0; i < buffer.length; i++) await kv.set(["availableImages", getId, getPosition, i], buffer[i]);
+                await kv.set(["availableImages", getId], Math.max(previousPosition, +getPosition));
+                return autoResponse({ body: "OK", status: 200 });
+            }
+            return autoResponse({ body: "Missing fields", status: 400 })
+        }
+        case "fetch": { // Get the image content
+            const params = new URLSearchParams(req.url.substring(req.url.indexOf("?") + 1));
+            const getPosition = params.get("position");
+            const getId = params.get("id");
+            if (getPosition && getId) {
+                const generalInfo = await kv.get(["availableImages", getId, getPosition]);
+                if (typeof generalInfo.value === "number") { // There are some ArrayBuffers of the image
+                    const mergedArr: ArrayBuffer[] = [];
+                    for (let i = 0; i < generalInfo.value; i++) { // Get each ArrayBuffer and merge them
+                        const output = await kv.get(["availableImages", getId, getPosition, i]);
+                        output.value instanceof ArrayBuffer && mergedArr.push(output.value);
+                    }
+                    const outputBuffer = joinArrayBuffers(mergedArr);
+                    return autoResponse({ body: outputBuffer as ArrayBuffer, status: 200 });
+                } else return autoResponse({ body: "Not found", status: 404 });
+            } else return autoResponse({ body: "Missing fields", status: 400 });
+        }
+        case "auth": { // Start the authentication process using OAuth
+            const state = new URLSearchParams(req.url.substring(req.url.indexOf("?") + 1)).get("state");
+            if (!state) return autoResponse({ body: "Missing fields", status: 40 })
+            return autoResponse({ body: `<!DOCTYPE html><body><script>window.location.href = "https://www.tiktok.com/v2/auth/authorize?client_key=${Deno.env.get("clientKey")}&redirect_uri=${encodeURIComponent(Deno.env.get("sourceUrl") + "/oauth.html")}&state=${encodeURIComponent(state)}&response_type=code&scope=${encodeURIComponent("video.publish,video.upload,user.info.basic,user.info.basic")}"</script></body>`, type: "text/html" })
+        }
+        case "post": { // Send the request to post the content to TikTok servers
+            if (req.method !== "POST") return autoResponse({ body: "Endpoint available only with POST request.", status: 405 });
+            const json = await new Response(req.body).json() as PostRequest;
+            if (typeof json.description === "string" && typeof json.code === "string" && typeof json.id === "string" && typeof json.title === "string" && typeof json.thumbnail === "number") {
+                const tokenRequest = await fetch(`https://open.tiktokapis.com/v2/oauth/token/`, {
+                    headers: {
+                        "Content-Type": "application/x-www-form-urlencoded"
+                    },
+                    method: "POST",
+                    body: `client_key=${Deno.env.get("clientKey")}&client_secret=${Deno.env.get("clientSecret")}&code=${json.code}&grant_type=authorization_code&redirect_uri=${encodeURIComponent(Deno.env.get("sourceUrl") + "/oauth.html")}`
+                });
+                const tokenJson = await tokenRequest.json();
+                if (tokenRequest.status === 200) {
+                    const buildImageUrl = (await kv.get(["availableImages", json.id])).value;
+                    if (!buildImageUrl) return autoResponse({ body: "Non-existent ID", status: 401 });
+                    const finalBuild = Math.min(buildImageUrl as number, 35);
+                    const finalArr = [];
+                    for (let i = 1; i < finalBuild + 1; i++) finalArr.push(`${Deno.env.get("denoUrl")}/fetch?id=${json.id}&position=${i}`);
+                    const imageRequest = await fetch("https://open.tiktokapis.com/v2/post/publish/content/init/", {
+                        headers: {
+                            Authorization: `Bearer ${tokenJson.access_token}`,
+                            "Content-Type": `application/json; charset=UTF-8`
+                        },
+                        method: "POST",
+                        body: JSON.stringify({
+                            media_type: "PHOTO",
+                            post_mode: "DIRECT_POST",
+                            post_info: {
+                                title: json.title,
+                                description: json.description,
+                                privacy_level: "SELF_ONLY",
+                            },
+                            source_info: {
+                                source: "PULL_FROM_URL",
+                                photo_images: finalArr,
+                                photo_cover_index: json.thumbnail
+                            }
+                        })
+                    })
+                    if (imageRequest.status === 200) return autoResponse({ body: "", status: 200 }); else return autoResponse({ body: "Error while uploading images", status: 500 });
+                };
+                return autoResponse({ body: "Error while fetching token", status: 500 });
+            } else return autoResponse({ body: "Missing fields" })
+        }
+        case Deno.env.get("tiktokVerificationFileName"): { // The file that TikTok requires to keep in the server to verify ownership
+            return autoResponse({ body: Deno.env.get("tiktokVerificationFileContent") });
+        }
+    }
+    return autoResponse({ body: "Not found", status: 400 })
+})
diff --git a/src/App.svelte b/src/App.svelte
@@ -1,7 +1,11 @@
 <script lang="ts">
   import Header from "./lib/Header.svelte";
   import "./app.css";
-  import { conversionStatus } from "./Scripts/Storage";
+  import {
+    conversionStatus,
+    TikTokProgress,
+    TikTokURL,
+  } from "./Scripts/Storage";
   import Picker from "./lib/Picker.svelte";
   import Resize from "./lib/ImageEditing/Resize.svelte";
   import Filter from "./lib/ImageEditing/Filter.svelte";
@@ -18,6 +22,7 @@
   import Privacy from "./lib/Privacy.svelte";
   import Licenses from "./lib/Licenses.svelte";
   import CheckNativeHeicSupport from "./Scripts/CheckNativeHeicSupport";
+  import TikTokIntegration from "./lib/Extra/TikTokIntegration.svelte";
   /**
    * If set to `1`, the Settings dialog will be shown
    */
@@ -110,9 +115,9 @@
    * Set in the LocalStorage the new PDF Scale
    * @param e the Event
    */
-  function PDFScaleChange(e: Event) {
+  function PDFScaleChange(e: Event, key?: string) {
     localStorage.setItem(
-      "ImageConverter-PDFScale",
+      key ?? "ImageConverter-PDFScale",
       (e.target as HTMLInputElement).value,
     );
   }
@@ -156,15 +161,18 @@
 {:else if $conversionStatus === 1}
   <ImagePicker></ImagePicker><br />
   <div class="flex multiPage">
-    <Resize></Resize>
     <div>
       <Filter></Filter>
     </div>
     <CanvasRender></CanvasRender>
   </div>
   <br /><br />
+  {#if $TikTokProgress !== -1}
+    <TikTokIntegration></TikTokIntegration>
+  {/if}
 {/if}
 <ExportDialog></ExportDialog>
+
 <br /><br /><br />
 <span
   style="position: absolute; right: 15px; top: 15px; transform: scale(0.9)"
@@ -253,6 +261,25 @@
       {/await}
     </div>
     <br /><br />
+    <div class="second card">
+      <TitleIcon asset="musicnote" isH3={true}>TikTok integration</TitleIcon>
+      <p>
+        Write the link for the server that'll be used for posting images on
+        TikTok (add the / after the URL). Leave this field blank to disable this
+        function
+      </p>
+      <input
+        class="fullWidth"
+        type="text"
+        bind:value={$TikTokURL}
+        on:input={(e) => PDFScaleChange(e, "ImageConverter-TikTokURL")}
+      /><br /><br />
+      <i
+        >TikTok is a trademark of ByteDance, that is in no way affiliated with
+        image-renderer</i
+      >
+    </div>
+    <br /><br />
     <Licenses></Licenses>
   </Dialog>
 {:else if dialogShow === 2}