devanlai · December 3, 2019 04:26
diff --git a/test_unconfigured_device_request.html b/test_unconfigured_device_request.html

 <!DOCTYPE html>
 <html>
  <head>
    <meta charset="UTF-8">
    <title>WebUSB Control Transfer Request to Device Endpoint while unconfigured</title>
    <script>
      async function readDeviceDescriptor(device) {
        const GET_DESCRIPTOR = 0x06;
        const DT_DEVICE = 0x01;
        const wValue = (DT_DEVICE << 8);

        let result = await device.controlTransferIn({
          "requestType": "standard",
          "recipient": "device",
          "request": GET_DESCRIPTOR,
          "value": wValue,
          "index": 0
        }, 18);
        return result;
      }
      function parseDeviceDescriptor(data) {
        return {
          bLength:            data.getUint8(0),
          bDescriptorType:    data.getUint8(1),
          bcdUSB:             data.getUint16(2, true),
          bDeviceClass:       data.getUint8(4),
          bDeviceSubClass:    data.getUint8(5),
          bDeviceProtocol:    data.getUint8(6),
          bMaxPacketSize:     data.getUint8(7),
          idVendor:           data.getUint16(8, true),
          idProduct:          data.getUint16(10, true),
          bcdDevice:          data.getUint16(12, true),
          iManufacturer:      data.getUint8(14),
          iProduct:           data.getUint8(15),
          iSerialNumber:      data.getUint8(16),
          bNumConfigurations: data.getUint8(17),
        };
      }

      document.addEventListener("DOMContentLoaded", function (event) {
        let status = document.getElementById("status");

        function log(msg) {
          console.log(msg);
          let div = document.createElement("div");
          div.textContent = msg;
          status.appendChild(div);
        }

        function logPreformatted(msg) {
          console.log(msg);
          let div = document.createElement("div");
          div.textContent = msg;
          div.style = "white-space: pre; font-family: monospace";
          status.appendChild(div);
        }

        function displayDeviceDescriptor(desc) {
          const names = "bLength bDescriptorType bcdUSB bDeviceClass bDeviceSubClass bDeviceProtocol bMaxPacketSize idVendor idProduct bcdDevice iManufacturer iProduct iSerialNumber bNumConfigurations".split(" ");
     
          for (let name of names) {
            logPreformatted((name + ':').padEnd(20) + desc[name]);
          }
        }
        
        async function runTest(withConfiguration) {
          const usb_options = { filters: [] };
          let device = await navigator.usb.requestDevice(usb_options);

          try {
            await device.open();
          } catch (err) {
            log("Failed to open USB device: " + err);
            if (err.toString().startsWith("NotFoundError")) {
              log("Make sure you're running this test from a secure context (e.g. localhost or HTTPS, not a file:/// URI)");
            }
            return;
          }

          try {
            if (withConfiguration !== undefined && withConfiguration !== null) {
              log("Selecting configuration " + withConfiguration);
              try {
                await device.selectConfiguration(withConfiguration);
              } catch (err) {
                log("Failed to select configuration " + withConfiguration + ": " + err);
              }
            } else {
              log("Proceeding without selecting configuration");
            }

            let result = await readDeviceDescriptor(device);
            if (result.status == "ok") {
              log("Successfully read device descriptor");
              let desc = parseDeviceDescriptor(result.data);
              displayDeviceDescriptor(desc);
            } else {
              log("Control transfer failed: " + result.status);
            }
          } catch (err) {
            log("Failed to initiate control transfer: " + err);
          }
        }
                
        document.getElementById("testButton").addEventListener("click", async function (event) {
          // Test without setting the configuration explicitly
          runTest(null);
        });
        
        document.getElementById("testWithConfigButton").addEventListener("click", async function (event) {
          // Test explicitly setting configuration to 1
          runTest(1);
        });
      });
    </script>
  </head>
  <body>
    <button id="testButton">Test w/o setting configuration</button>
    <button id="testWithConfigButton">Test with setting configuration</button>
    <div id="status"></div>
  </body>
 </html>

	<!DOCTYPE html>
	<html>
	<head>
	<meta charset="UTF-8">
	<title>WebUSB Control Transfer Request to Device Endpoint while unconfigured</title>
	<script>
	async function readDeviceDescriptor(device) {
	const GET_DESCRIPTOR = 0x06;
	const DT_DEVICE = 0x01;
	const wValue = (DT_DEVICE << 8);

	let result = await device.controlTransferIn({
	"requestType": "standard",
	"recipient": "device",
	"request": GET_DESCRIPTOR,
	"value": wValue,
	"index": 0
	}, 18);
	return result;
	}
	function parseDeviceDescriptor(data) {
	return {
	bLength: data.getUint8(0),
	bDescriptorType: data.getUint8(1),
	bcdUSB: data.getUint16(2, true),
	bDeviceClass: data.getUint8(4),
	bDeviceSubClass: data.getUint8(5),
	bDeviceProtocol: data.getUint8(6),
	bMaxPacketSize: data.getUint8(7),
	idVendor: data.getUint16(8, true),
	idProduct: data.getUint16(10, true),
	bcdDevice: data.getUint16(12, true),
	iManufacturer: data.getUint8(14),
	iProduct: data.getUint8(15),
	iSerialNumber: data.getUint8(16),
	bNumConfigurations: data.getUint8(17),
	};
	}

	document.addEventListener("DOMContentLoaded", function (event) {
	let status = document.getElementById("status");

	function log(msg) {
	console.log(msg);
	let div = document.createElement("div");
	div.textContent = msg;
	status.appendChild(div);
	}

	function logPreformatted(msg) {
	console.log(msg);
	let div = document.createElement("div");
	div.textContent = msg;
	div.style = "white-space: pre; font-family: monospace";
	status.appendChild(div);
	}

	function displayDeviceDescriptor(desc) {
	const names = "bLength bDescriptorType bcdUSB bDeviceClass bDeviceSubClass bDeviceProtocol bMaxPacketSize idVendor idProduct bcdDevice iManufacturer iProduct iSerialNumber bNumConfigurations".split(" ");

	for (let name of names) {
	logPreformatted((name + ':').padEnd(20) + desc[name]);
	}
	}

	async function runTest(withConfiguration) {
	const usb_options = { filters: [] };
	let device = await navigator.usb.requestDevice(usb_options);

	try {
	await device.open();
	} catch (err) {
	log("Failed to open USB device: " + err);
	if (err.toString().startsWith("NotFoundError")) {
	log("Make sure you're running this test from a secure context (e.g. localhost or HTTPS, not a file:/// URI)");
	}
	return;
	}

	try {
	if (withConfiguration !== undefined && withConfiguration !== null) {
	log("Selecting configuration " + withConfiguration);
	try {
	await device.selectConfiguration(withConfiguration);
	} catch (err) {
	log("Failed to select configuration " + withConfiguration + ": " + err);
	}
	} else {
	log("Proceeding without selecting configuration");
	}

	let result = await readDeviceDescriptor(device);
	if (result.status == "ok") {
	log("Successfully read device descriptor");
	let desc = parseDeviceDescriptor(result.data);
	displayDeviceDescriptor(desc);
	} else {
	log("Control transfer failed: " + result.status);
	}
	} catch (err) {
	log("Failed to initiate control transfer: " + err);
	}
	}

	document.getElementById("testButton").addEventListener("click", async function (event) {
	// Test without setting the configuration explicitly
	runTest(null);
	});

	document.getElementById("testWithConfigButton").addEventListener("click", async function (event) {
	// Test explicitly setting configuration to 1
	runTest(1);
	});
	});
	</script>
	</head>
	<body>
	<button id="testButton">Test w/o setting configuration</button>
	<button id="testWithConfigButton">Test with setting configuration</button>
	<div id="status"></div>
	</body>
	</html>