zip: set minimum version field back to 4.5

I'm not sure what the deal is, it sounds like the UTF-8 bit flag is
6.3, but linux's zip utilities don't support 6.3 and do support the
bit flag, so *shrug*

resources/transbeam-common.asy

@@ -0,0 +1,48 @@
+struct transbeamPrefs {
+  real triangleRadius;
+  real borderInset;
+  real circleRadius;
+  real bigBeamRadius;
+  real smallBeamRadius;
+  real beamCount;
+  real beamAngle;
+  real starterBeamAngle;
+}
+
+void drawTransbeam(transbeamPrefs prefs) {
+  unravel prefs;
+
+  pen transBlue = rgb("55cdfc");
+  pen transPink = rgb("f7a8b8");
+
+  pen bigBeamColor = transPink;
+  pen smallBeamColor = transBlue;
+
+  path borderTriangle = dir(90)--dir(210)--dir(330)--cycle;
+  path outerBorder = scale(triangleRadius)*borderTriangle;
+  fill(outerBorder, white);
+
+  path beam(real angle, real innerRadius, real outerRadius) {
+    return arc((0,0), outerRadius, angle/2, -angle/2)--arc((0,0), innerRadius, -angle/2, angle/2)--cycle;
+  }
+
+  path bigBeam = beam(beamAngle, circleRadius, bigBeamRadius);
+  path smallBeam = beam(beamAngle, circleRadius, smallBeamRadius);
+
+  for (int i = 0; i < beamCount; ++i) {
+    if (i > 0) {
+      fill(rotate(360*i/beamCount)*bigBeam, bigBeamColor);
+    }
+    fill(rotate(360*(i+0.5)/beamCount)*smallBeam, smallBeamColor);
+  }
+
+  pair starterBeamTrianglePoint(real angle) {
+    pair circlePoint = circleRadius*dir(angle);
+    return intersectionpoint(circlePoint--(circlePoint+(triangleRadius,0)), outerBorder);
+  }
+
+  fill(starterBeamTrianglePoint(-starterBeamAngle/2)--arc((0,0), circleRadius, -starterBeamAngle/2, starterBeamAngle/2)--starterBeamTrianglePoint(starterBeamAngle/2)--cycle, bigBeamColor);
+
+  draw(outerBorder, transPink+(2*borderInset));
+  draw(scale(triangleRadius-borderInset)*borderTriangle, transBlue+borderInset);
+}

resources/transbeam-favicon.asy

@@ -0,0 +1,13 @@
+import "transbeam-common.asy" as transbeam;
+
+transbeamPrefs prefs;
+prefs.triangleRadius = 100;
+prefs.borderInset = 14;
+prefs.circleRadius = 12;
+prefs.bigBeamRadius = 36;
+prefs.smallBeamRadius = 36;
+prefs.beamCount = 3;
+prefs.beamAngle = 40;
+prefs.starterBeamAngle = 80;
+
+drawTransbeam(prefs);

resources/transbeam.asy

@@ -1,43 +1,13 @@
-real triangleRadius = 100;
-real borderInset = 6;
+import "transbeam-common.asy" as transbeam;
 
-real circleRadius = 12;
-real bigBeamRadius = 36;
-real smallBeamRadius = 25;
-real beamCount = 12;
-real beamAngle = 7;
-real starterBeamAngle = 16;
+transbeamPrefs prefs;
+prefs.triangleRadius = 100;
+prefs.borderInset = 6;
+prefs.circleRadius = 12;
+prefs.bigBeamRadius = 36;
+prefs.smallBeamRadius = 25;
+prefs.beamCount = 12;
+prefs.beamAngle = 7;
+prefs.starterBeamAngle = 16;
 
-pen transBlue = rgb("55cdfc");
-pen transPink = rgb("f7a8b8");
-
-pen bigBeamColor = transPink;
-pen smallBeamColor = transBlue;
-
-path borderTriangle = dir(90)--dir(210)--dir(330)--cycle;
-path outerBorder = scale(triangleRadius)*borderTriangle;
-fill(outerBorder, white);
-
-path beam(real angle, real innerRadius, real outerRadius) {
-  return arc((0,0), outerRadius, angle/2, -angle/2)--arc((0,0), innerRadius, -angle/2, angle/2)--cycle;
-}
-
-path bigBeam = beam(beamAngle, circleRadius, bigBeamRadius);
-path smallBeam = beam(beamAngle, circleRadius, smallBeamRadius);
-
-for (int i = 0; i < beamCount; ++i) {
-  if (i > 0) {
-    fill(rotate(360*i/beamCount)*bigBeam, bigBeamColor);
-  }
-  fill(rotate(360*(i+0.5)/beamCount)*smallBeam, smallBeamColor);
-}
-
-pair starterBeamTrianglePoint(real angle) {
-  pair circlePoint = circleRadius*dir(angle);
-  return intersectionpoint(circlePoint--(circlePoint+(triangleRadius,0)), outerBorder);
-}
-
-fill(starterBeamTrianglePoint(-starterBeamAngle/2)--arc((0,0), circleRadius, -starterBeamAngle/2, starterBeamAngle/2)--starterBeamTrianglePoint(starterBeamAngle/2)--cycle, bigBeamColor);
-
-draw(outerBorder, transPink+(2*borderInset));
-draw(scale(triangleRadius-borderInset)*borderTriangle, transBlue+borderInset);
+drawTransbeam(prefs);

src/zip.rs

@@ -87,7 +87,7 @@ impl UploadedFile {
     /// through "Extra field length".
     fn shared_header_fields(&self, hash: Option<u32>) -> Vec<u8> {
         let mut fields = vec![
-            63, 0,      // Minimum version required to extract: 6.3 for UTF-8 filenames
+            45, 0,      // Minimum version required to extract: 4.5 for ZIP64
             0b00001000, // General purpose bit flag: bit 3 - size and CRC-32 in data descriptor
             0b00001000, // General purpose bit flag: bit 11 - UTF-8 filenames
             0, 0,       // Compression method: none
@@ -138,7 +138,7 @@ impl UploadedFile {
     fn central_directory_header(&self, local_header_offset: u64, hash: u32) -> Vec<u8> {
         let mut header = vec![
             0x50, 0x4b, 0x01, 0x02, // Central directory file header signature
-            63, 3,                  // Made by a Unix system supporting version 6.3
+            45, 3,                  // Made by a Unix system supporting version 4.5
         ];
         header.append(&mut self.shared_header_fields(Some(hash)));
         append_0(&mut header, 8); // Comment length, disk number, internal attributes, DOS external attributes
@@ -169,8 +169,8 @@ fn end_of_central_directory(files: &[UploadedFile]) -> Vec<u8> {
     ];
     append_0(&mut eocd, 7); // pad out the rest of the size field
     eocd.append(&mut vec![
-        63, 3, // Made by a Unix system supporting version 6.3
-        63, 0, // Minimum version 6.3 to extract
+        45, 3, // Made by a Unix system supporting version 4.5
+        45, 0, // Minimum version 4.5 to extract
     ]);
     append_0(&mut eocd, 8); // Two 4-byte disk numbers, both 0
                             // Number of central directory records, on this disk and in total

static/index.html

@@ -9,8 +9,8 @@
   <body>
     <div>
     <label>
-      <span class="fake_button" id="file_input_message">Select files to upload...</span>
       <input type="file" multiple id="file_input"/>
+      <span class="fake_button" id="file_input_message">Select files to upload...</span>
     </label>
     </div>
     <button id="upload" disabled>Upload</button>

static/transbeam.css

@@ -17,8 +17,9 @@ button:hover, .fake_button:hover {
     background-color: #aaa;
 }
 
-button:disabled, button:disabled:hover, .fake_button:disabled, .fake_button:disabled:hover {
+button:disabled, input:disabled + .fake_button {
     color: #aaa;
     background-color: #eee;
     border-color: #ddd;
+    cursor: not-allowed;
 }

static/upload.js

@@ -106,11 +106,11 @@ uploadButton.addEventListener('click', (e) => {
 
     totalBytes = files.reduce((acc, file) => acc + file.size, 0);
 
-    socket = new WebSocket(`ws://${window.location.host}/upload`);
+    socket = new WebSocket(`${window.location.protocol === 'http:' ? 'ws' : 'wss'}://${window.location.host}/upload`);
     socket.addEventListener('open', sendMetadata);
     socket.addEventListener('message', (msg) => {
         if (bytesSent === 0 && msg.data.match(/^[A-Za-z0-9]+$/)) {
-            downloadLink.textContent = msg.data;
+            downloadLink.textContent = `${window.location.origin}/download/${msg.data}`;
             sendData();
         } else if (msg.data === 'ack') {
             sendData();