Allow to upload file and download from given link

2 files changed, 118 insertions, 0 deletions

diff --git a/public/main.css b/public/main.css
new file mode 100644
index 0000000..0a20779
--- /dev/null
+++ b/public/main.css
@@ -0,0 +1,70 @@
+html {
+    margin: 0 1rem;
+}
+
+body {
+    max-width: 500px;
+    margin: 0 auto;
+    font-family: sans-serif;
+}
+
+a {
+    text-decoration: none;
+    color: #06C;
+}
+
+h1 {
+    text-align: center;
+    font-variant: small-caps;
+    font-size: 40px;
+    letter-spacing: 0.2rem;
+}
+
+.g-Link {
+    text-decoration: underline;
+}
+
+label {
+    display: flex;
+    gap: 0.5rem;
+    flex-direction: column;
+    margin-bottom: 2rem;
+}
+
+input[type=submit] {
+    width: 100%;
+}
+
+.g-Loading {
+    display: none;
+    align-items: center;
+    justify-content: center;
+    gap: 1rem;
+    margin-bottom: 2rem;
+}
+
+.g-Error {
+    text-align: center;
+    margin-bottom: 2rem;
+    color: #C00;
+}
+
+.g-Spinner {
+    width: 25px;
+    height: 25px;
+    border: 4px solid #06C;
+    border-bottom-color: transparent;
+    border-radius: 50%;
+    display: inline-block;
+    box-sizing: border-box;
+    animation: rotation 1s linear infinite;
+}
+
+@keyframes rotation {
+    0% {
+        transform: rotate(0deg);
+    }
+    100% {
+        transform: rotate(360deg);
+    }
+}
diff --git a/public/main.js b/public/main.js
new file mode 100644
index 0000000..1729d38
--- /dev/null
+++ b/public/main.js
@@ -0,0 +1,48 @@
+window.onload = function() {
+    const form = document.querySelector('form')
+
+    if (form !== null) {
+        const submit = document.querySelector('input[type="submit"]')
+        const loading = document.querySelector('.g-Loading')
+        const error = document.querySelector('.g-Error')
+
+        function showError(msg) {
+            loading.style.display = 'none'
+            submit.disabled = false
+            error.innerText = msg
+            error.style.display = 'block'
+        }
+
+        form.onsubmit = function(event) {
+            event.preventDefault()
+
+            loading.style.display = 'flex'
+            submit.disabled = true
+            error.style.display = 'none'
+
+            const key = document.querySelector('input[name="key"]').value
+            const expiration = document.querySelector('select[name="expiration"]').value
+            const file = document.querySelector('input[name="file"]').files[0]
+
+            // Wait a bit to prevent showing the loader too briefly
+            setTimeout(function() {
+                const xhr = new XMLHttpRequest()
+                xhr.open('POST', '/', true)
+                xhr.onload = function () {
+                    if (xhr.status === 200) {
+                        window.location = `/${xhr.responseText}`
+                    } else {
+                        showError(`Error uploading: ${xhr.status}`)
+                    }
+                }
+                xhr.onerror = function () {
+                    showError('Upload error')
+                }
+                xhr.setRequestHeader('X-FileName', file.name)
+                xhr.setRequestHeader('X-Expiration', expiration)
+                xhr.setRequestHeader('X-Key', key)
+                xhr.send(file)
+            }, 500)
+        }
+    }
+}