From 347b14c84b6f0440f09473eeca0dce6791d60dc8 Mon Sep 17 00:00:00 2001
From: Ave <112294121+Ave9858@users.noreply.github.com>
Date: Mon, 29 May 2023 01:59:31 +0000
Subject: [PATCH 1/2] automatically use shared session when needed

---
 index.html |  8 ++------
 js/msdl.js | 11 ++++++-----
 2 files changed, 8 insertions(+), 11 deletions(-)

diff --git a/index.html b/index.html
index 3a5a8bd..7beaba3 100644
--- a/index.html
+++ b/index.html
@@ -63,8 +63,8 @@
 
     <div id="msdl-processing-error">
         <h2>Error</h2>
-        <p>An error has occurred while processing your request. Try clicking the use shared session button if reloading
-            the page does not work.</p>
+        <p>An error has occurred while processing your request. If reloading the page does not work, <a
+                href="https://massgrave.dev/contactus.html">contact us</a> or create an issue on GitHub.</p>
     </div>
 
     <div id="back-to-products">
@@ -72,10 +72,6 @@
         <button onClick="backToProducts();">Go back to the product list</button>
     </div>
 
-    <div id="use-shared-session">
-        <button onClick="useSharedSession();">Use shared session (use if download keeps failing)</button>
-    </div>
-
     <input id="msdl-session-id" type="hidden">
 </body>
 
diff --git a/js/msdl.js b/js/msdl.js
index ffe40d1..a9be893 100644
--- a/js/msdl.js
+++ b/js/msdl.js
@@ -9,7 +9,6 @@ const processingError = document.getElementById('msdl-processing-error');
 
 const productsList = document.getElementById('products-list');
 const backToProductsDiv = document.getElementById('back-to-products');
-const useSharedSessionDiv = document.getElementById('use-shared-session');
 
 const sharedSessionGUID = "47cbc254-4a79-4be6-9866-9c625eb20911";
 
@@ -41,7 +40,6 @@ function updateContent(content, response) {
 
     if (errorMessage) {
         processingError.style.display = "block";
-        useSharedSessionDiv.style.display = "block";
         return false;
     }
 
@@ -80,9 +78,14 @@ function onDownloadsXhrChange() {
     pleaseWait.style.display = "none";
     msContent.style.display = "block";
 
-    if (updateContent(msContent, this.responseText) && !sharedSession) {
+    let wasSuccessful = updateContent(msContent, this.responseText);
+
+    if (wasSuccessful && !sharedSession) {
         fetch(sessionUrl + sharedSessionGUID);
     }
+    else if (!sharedSession) {
+        useSharedSession()
+    }
 }
 
 function getLanguages(productId) {
@@ -111,7 +114,6 @@ function getDownload() {
 
 function backToProducts() {
     backToProductsDiv.style.display = 'none';
-    useSharedSessionDiv.style.display = 'none';
     productsList.style.display = 'block';
     msContent.style.display = 'none';
     pleaseWait.style.display = 'none';
@@ -124,7 +126,6 @@ function backToProducts() {
 function useSharedSession() {
     sharedSession = true;
     pleaseWait.style.display = "block";
-    useSharedSessionDiv.style.display = 'none';
     processingError.style.display = 'none';
 
     let url = langsUrl + "&productEditionId=" + window.location.hash.substring(1) + "&sessionId=" + sharedSessionGUID;

From b24cbd750c606dde0c363b222b809fc9d829433b Mon Sep 17 00:00:00 2001
From: Ave <112294121+Ave9858@users.noreply.github.com>
Date: Mon, 29 May 2023 06:44:06 +0000
Subject: [PATCH 2/2] add backend

---
 js/msdl.js | 41 +++++++++++++++++++++++++++++++++++++----
 1 file changed, 37 insertions(+), 4 deletions(-)

diff --git a/js/msdl.js b/js/msdl.js
index a9be893..97d1dca 100644
--- a/js/msdl.js
+++ b/js/msdl.js
@@ -2,6 +2,8 @@ const langsUrl = "https://www.microsoft.com/en-us/api/controls/contentinclude/ht
 const downUrl = "https://www.microsoft.com/en-us/api/controls/contentinclude/html?pageId=cfa9e580-a81e-4a4b-a846-7b21bf4e2e5b&host=www.microsoft.com&segments=software-download%2Cwindows11&query=&action=GetProductDownloadLinksBySku&sdVersion=2";
 const sessionUrl = "https://vlscppe.microsoft.com/fp/tags?org_id=y6jn8c31&session_id="
 
+const apiUrl = "https://massgrave.dev/api/msdl/proxy"
+
 const sessionId = document.getElementById('msdl-session-id');
 const msContent = document.getElementById('msdl-ms-content');
 const pleaseWait = document.getElementById('msdl-please-wait');
@@ -75,17 +77,43 @@ function onDownloadsXhrChange() {
     if (pleaseWait.style.display != "block")
         return;
 
-    pleaseWait.style.display = "none";
     msContent.style.display = "block";
 
     let wasSuccessful = updateContent(msContent, this.responseText);
 
-    if (wasSuccessful && !sharedSession) {
-        fetch(sessionUrl + sharedSessionGUID);
+    if (wasSuccessful) {
+        pleaseWait.style.display = "none";
+        if (!sharedSession) {
+            fetch(sessionUrl + sharedSessionGUID);
+        }
     }
     else if (!sharedSession) {
-        useSharedSession()
+        useSharedSession();
     }
+    else {
+        getFromServer();
+    }
+}
+
+function getFromServer() {
+    let url = apiUrl + "?product_id=" + window.location.hash.substring(1) +
+        "&sku_id=" + skuId;
+    let xhr = new XMLHttpRequest();
+    xhr.onload = displayResponseFromServer;
+    xhr.open("GET", url, true);
+    xhr.send();
+}
+
+function displayResponseFromServer() {
+    pleaseWait.style.display = "none";
+    processingError.style.display = "none";
+
+    if (!(this.status == 200)) {
+        processingError.style.display = "block";
+        alert(JSON.parse(this.responseText)["Error"])
+        return;
+    }
+    msContent.innerHTML = this.responseText
 }
 
 function getLanguages(productId) {
@@ -125,6 +153,10 @@ function backToProducts() {
 
 function useSharedSession() {
     sharedSession = true;
+    retryDownload();
+}
+
+function retryDownload() {
     pleaseWait.style.display = "block";
     processingError.style.display = 'none';
 
@@ -133,6 +165,7 @@ function useSharedSession() {
     xhr.onload = getDownload;
     xhr.open("GET", url);
     xhr.send();
+
 }
 
 function prepareDownload(id) {