Export synchronous wget functions (#14)

Co-authored-by: rodolpheh <[email protected]>

Author: rodolpheh

src/zemscripten.zig

@@ -197,3 +197,27 @@ pub fn log(
         else => emscripten_console_log(@ptrCast(msg.ptr)),
     }
 }
+
+// Networking
+extern fn emscripten_wget(url: [*c]const u8, file: [*c]const u8) c_int;
+extern fn emscripten_wget_data(url: [*c]const u8, pbuffer: **anyopaque, pnum: *c_int, perror: *c_int) void;
+
+pub fn wget(url: [:0]const u8, file: [:0]const u8) !void {
+    if (emscripten_wget(url.ptr, file.ptr) != 0) {
+        return error.WgetError;
+    }
+}
+
+pub fn wget_data(url: [:0]const u8) ![]u8 {
+    var buffer_ptr: *anyopaque = undefined;
+    var len: c_int = undefined;
+    var err: c_int = undefined;
+
+    emscripten_wget_data(url.ptr, &buffer_ptr, &len, &err);
+
+    if (err != 0) {
+        return error.WgetError;
+    }
+
+    return @as([*]u8, @ptrCast(buffer_ptr))[0..@intCast(len)];
+}