* server now return hash to client

* show the link to copy for download

src/public/js/main.js

@@ -64,20 +64,56 @@ const update = (element, text, tag = undefined) => {
  */
 const send = (file, element) => {
     file.text().then((content) => {
+        const req = new XMLHttpRequest();
+
         element = update(element, "Génération des clefs...", "H3");
-        gen_RSA_keypair(1024).then(([, sec_key]) => {
+        gen_RSA_keypair(1024).then(([pub_key, sec_key]) => {
             element = update(element, "Chiffrement du fichier...", "H3");
 
             let data = {
                 file: RSA_enc(content, sec_key).map((v) => v.toString()),
             };
 
-            update(element, "Téléversement...", "H3");
-            const req = new XMLHttpRequest();
+            element = update(element, "Téléversement...", "H3");
             req.open("POST", "api/upload");
             req.setRequestHeader("Content-Type", "application/json");
             req.send(JSON.stringify(data));
 
+            req.onload = () => {
+                if (req.status == 200) {
+                    /* Change here the area with the copy link */
+                    let url = window.location.href.split("/");
+                    url.pop();
+                    url.push("file");
+
+                    let main_div = element.parentElement.parentElement;
+                    main_div.textContent = "";
+                    let div = document.createElement("DIV");
+                    div.textContent = "Fichier prêt !";
+                    div.className = "link-area";
+                    main_div.appendChild(div);
+
+                    let message = document.createElement("P");
+                    message.innerHTML = `Copiez le lien pour télécharger <code>${file.name}</code>`;
+                    div.appendChild(message);
+
+                    let input = document.createElement("INPUT");
+                    input.value = `${url.join("/")}/${req.responseText.slice(
+                        1,
+                        -2
+                    )}/${pub_key[0]}:${pub_key[1]}`;
+                    input.readOnly = true;
+                    div.appendChild(input);
+
+                    // TODO: Change button textContent on click
+                    let button = document.createElement("BUTTON");
+                    button.textContent = "Copier le lien";
+                    div.appendChild(button);
+                } else {
+                    console.error("Upload failed.");
+                }
+            };
+
             /* Here we need to store the public key and then wait for a response
              * from the server. When the server send us a hash of the file
              * we redirect the user the a wait page so the uploader can copy

src/public/styles/style.css

@@ -70,7 +70,8 @@ main {
     padding-top: 0.5em;
 }
 
-.upload-area {
+.upload-area,
+.link-area {
     border: 2px dashed var(--border);
     height: 70vh;
     width: 65vw;

src/routes/api/upload.py

@@ -1,8 +1,8 @@
 from time import time
 
 from config import Config
-from flask import Blueprint, redirect, request
-from utils.misc import h
+from flask import Blueprint, redirect, request, jsonify
+from utils.misc import hash_data
 from werkzeug.wrappers.response import Response
 
 router = Blueprint("upload", __name__)
@@ -11,14 +11,16 @@ router = Blueprint("upload", __name__)
 @router.route("", methods=["POST"])
 def upload() -> Response:
     """Upload interface (receive file from javascript client)"""
-    if request.method == "POST":
-        json = request.get_json()
-        if json:
-            data = "".join(json["file"])
-            data_hash = h(data)
-            with open(f"{Config.uploads_dir}/{data_hash}", 'w') as f:
-                f.write(data)
+    json = request.get_json()
+    if json:
+        data = "".join(json["file"])
+        data_hash = hash_data(data)
+        with open(f"{Config.uploads_dir}/{data_hash}", 'w') as f:
+            f.write(data)
 
-            Config.database.add_file(data_hash, int(time()))
+        Config.database.add_file(data_hash, int(time()))
+
+        # Send the hash to the javascript client
+        return jsonify(data_hash)
 
     return redirect("/index")