luci-app-attendedsysupgrade: add package

Add a simple luci view in system tab to perform a sysupgrade
with no hassle.

Asks an external update server for upgrades, downloads and
flashes the upgrade.

This packge is the frontend for my current GSoC project:
https://summerofcode.withgoogle.com/projects/#5684958571003904

More code is found here:
https://github.com/aparcar/gsoc17-attended-sysupgrade

Signed-off-by: Paul Spooren <paul@spooren.de>
[jo@mein.io: squash commits, remove PKGARCH from Makefile]
Signed-off-by: Jo-Philipp Wich <jo@mein.io>

3 files changed, 282 insertions, 0 deletions

diff --git a/applications/luci-app-attendedsysupgrade/Makefile b/applications/luci-app-attendedsysupgrade/Makefile
new file mode 100644
index 000000000..32992e19d
--- /dev/null
+++ b/applications/luci-app-attendedsysupgrade/Makefile
@@ -0,0 +1,11 @@
+# See /LICENSE for more information.
+# This is free software, licensed under the GNU General Public License v2.
+
+include $(TOPDIR)/rules.mk
+
+LUCI_TITLE:=LuCI support for attended sysupgrades
+LUCI_DEPENDS:=+luci-base +rpcd-mod-attendedsysupgrade
+
+include ../../luci.mk
+
+# call BuildPackage - OpenWrt buildroot signature
diff --git a/applications/luci-app-attendedsysupgrade/luasrc/controller/attendedsysupgrade.lua b/applications/luci-app-attendedsysupgrade/luasrc/controller/attendedsysupgrade.lua
new file mode 100644
index 000000000..1bd050af6
--- /dev/null
+++ b/applications/luci-app-attendedsysupgrade/luasrc/controller/attendedsysupgrade.lua
@@ -0,0 +1,5 @@
+module("luci.controller.attendedsysupgrade", package.seeall)
+
+function index()
+        entry({"admin", "system", "attended_sysupgrade"}, template("attendedsysupgrade"), _("Attended Sysupgrade"), 1)
+end
diff --git a/applications/luci-app-attendedsysupgrade/luasrc/view/attendedsysupgrade.htm b/applications/luci-app-attendedsysupgrade/luasrc/view/attendedsysupgrade.htm
new file mode 100644
index 000000000..8bcec3b49
--- /dev/null
+++ b/applications/luci-app-attendedsysupgrade/luasrc/view/attendedsysupgrade.htm
@@ -0,0 +1,266 @@
+<%+header%>
+<h2 name="content"><%:Attended Sysupgrade%></h2>
+<div  class="container">
+	<div style="display: none" id="update_info" class="alert-message info">
+	</div>
+	<div style="display: none" id="update_error" class="alert-message danger">
+	</div>
+</div>
+<input class="cbi-button" value="search for updates" onclick="update_request()" type="button" id="update_button">
+
+<script type="text/javascript">
+
+latest_release = "";
+data = {};
+ubus_counter = 1
+origin = document.location.href.replace(location.pathname, "")
+ubus_url = origin + "/ubus/"
+
+// requests to the update server
+function server_request(request_dict, path, callback) {
+	url = data.update_server + "/" + path
+	request_dict.distro = data.release.distribution;
+	request_dict.target = data.release.target.split("\/")[0];
+	request_dict.subtarget = data.release.target.split("\/")[1];
+	request_dict.packages = data.packagelist;
+	var xmlhttp = new XMLHttpRequest();
+	xmlhttp.open("POST", url, true);
+	xmlhttp.setRequestHeader("Content-type", "application/json");
+	xmlhttp.send(JSON.stringify(request_dict));
+	xmlhttp.onerror = function(e) {
+		update_error("update server down")
+	}
+	xmlhttp.addEventListener('load', function(event) {
+		callback(xmlhttp)
+	});
+}
+
+// requests ubus via rpcd
+function ubus_request(command, argument, params, callback) {
+	// perform login if ubus_rpc_session is empty
+	var request_data = '{ "jsonrpc": "2.0", "id": ' + ubus_counter + ', "method": "call", "params": [ "'+ data["ubus_rpc_session"] +'", "' + command + '", "' + argument + '", ' + params + ' ] }'
+	ubus_counter++
+	var xmlhttp = new XMLHttpRequest();
+	xmlhttp.open("POST", ubus_url, true);
+	xmlhttp.setRequestHeader("Content-type", "application/json");
+	xmlhttp.onerror = function(e) {
+		setTimeout(back_online, 5000)
+	}
+	xmlhttp.addEventListener('load', function(event) {
+		if(command === "uci") {
+			ubus_request_callback_uci(xmlhttp, callback)
+		} else {
+			ubus_request_callback(xmlhttp, callback)
+		}
+	});
+	xmlhttp.send(request_data);
+}
+
+// handle ubus_requests, set variables or perform functions
+function ubus_request_callback(response_object, callback) {
+	if(response_object.status === 200) {
+		console.log(callback)
+		if(typeof callback === "string") {
+			response_json = JSON.parse(response_object.responseText).result[1]
+			data[callback] = response_json[callback]
+		} else {
+			callback(response_object)
+		}
+	} else {
+		console.log(respons_object.responseText)
+	}
+}
+
+function ubus_request_callback_uci(response_object, callback) {
+	if(response_object.status === 200) {
+		console.log(callback)
+		response_json = JSON.parse(response_object.responseText).result[1].value
+		data[callback] = response_json
+	} else {
+		console.log(respons_object.responseText)
+	}
+}
+
+// initial setup, get system information
+function setup() {
+	data["ubus_rpc_session"] = "<%=luci.dispatcher.context.authsession%>"
+	ubus_request("packagelist", "list", '{  }', "packagelist")
+	ubus_request("system", "board", '{  }', "release")
+	ubus_request("system", "board", '{  }', "board_name")
+	ubus_request("uci", "get", '{"config": "attendedsysupgrade", "section": "@settings[0]", "option": "update_server"}', "update_server")
+}
+
+// shows notification if update is available
+function update_info(info_output) {
+	document.getElementById("update_info").style.display = "block";
+	document.getElementById("update_info").innerHTML = info_output;
+}
+
+function update_error(error_output) {
+	document.getElementById("update_error").style.display = "block";
+	document.getElementById("update_error").innerHTML = error_output;
+	document.getElementById("update_info").style.display = "None";
+}
+
+// asks server for news updates, actually only based on relesae not packages
+function update_request() {
+	console.log("update_request")
+	request_dict = {}
+	request_dict.version = data.release.version;
+	server_request(request_dict, "update-request", update_request_callback)
+}
+
+function update_request_callback(response_object) {
+	if (response_object.status === 500) {
+		// python crashed
+		update_error("internal server error, please try again later")
+		console.log("update server issue")
+	} else if (response_object.status === 502) {
+		// python part offline
+		update_error("internal server error, please try again later")
+		console.log("update server issue")
+	} else if (response_object.status === 503) {
+		// handle overload
+		update_error("server overloaded, retry in 5 minutes")
+		console.log("server overloaded")
+		setTimeout(update_request, 300000)
+	} else if (response_object.status === 201) {
+		update_info("imagebuilder not ready, please wait")
+		console.log("setting up imagebuilder")
+		setTimeout(update_request, 5000)
+	} else if (response_object.status === 204) {
+		// no updates
+		update_info("no updates available")
+	} else if (response_object.status === 400) {
+		// bad request
+		console.log(response_object.responseText)
+		response_object_content = JSON.parse(response_object.responseText)
+		update_error(response_object_content)
+	} else if (response_object.status === 200) {
+		// new release/updates
+		response_object_content = JSON.parse(response_object.responseText)
+		update_request_200(response_object_content)
+	}
+}
+
+function back_online() {
+	ubus_request("session", "login", '{  }', back_online_callback)
+}
+
+function back_online_callback(response_object) {
+	if (response_object.status != 200) {
+		setTimeout(back_online, 5000)
+	} else {
+		update_info("upgrade successfull!")
+		document.getElementById("update_button").value = "reload page";
+		document.getElementById("update_button").onclick = function() { location.reload(); }
+	}
+
+}
+
+function update_request_200(response_content) {
+	info_output = ""
+	if(response_content.version != undefined) {
+		info_output += "new update available. from " + data.release.version + " to " + response_content.version
+		latest_version = response_content.version;
+	}
+	if(response_content.packages != undefined) {
+		info_output += "package updates available"
+	}
+	update_info(info_output)
+	document.getElementById("update_button").value = "request image";
+	document.getElementById("update_button").onclick = image_request;
+}
+
+// request the image, need merge with update_request
+function image_request() {
+	console.log("image_request")
+	request_dict = {}
+	request_dict.version = latest_version;
+	request_dict.board = data.board_name
+	server_request(request_dict, "/image-request", image_request_handler)
+}
+
+function image_request_handler(response) {
+	if (response.status === 400) {
+		response_content = JSON.parse(response.responseText)
+		update_error(response_content.error)
+	} else if (response.status === 500) {
+		image_request_500()
+	} else if (response.status === 503) {
+		update_error("please wait. server overloaded")
+		// handle overload
+		setTimeout(image_request, 30000)
+	} else if (response.status === 201) {
+		response_content = JSON.parse(response.responseText)
+		if(response_content.queue != undefined) {
+			// in queue
+			update_info("please wait. you are in queue position " + response_content.queue)
+			console.log("queued")
+		} else {
+			update_info("imagebuilder not ready, please wait")
+			console.log("setting up imagebuilder")
+		}
+		setTimeout(image_request, 5000)
+	} else if (response.status === 206) {
+		// building
+		console.log("building")
+		update_info("building image")
+		setTimeout(image_request, 5000)
+	} else if (response.status === 200) {
+		// ready to download
+		response_content = JSON.parse(response.responseText)
+		update_info("image created")
+		document.getElementById("update_button").value = "download and flash"
+		document.getElementById("update_button").onclick = function() {download_image(response_content.url); }
+	}
+}
+
+
+// uploads received blob data to the server using cgi-io
+function upload_image(blob) {
+	var upload_request = new XMLHttpRequest();
+	var form_data  = new FormData();
+
+	form_data.append("sessionid", data.ubus_rpc_session)
+	form_data.append("filename", "/tmp/sysupgrade.bin")
+	form_data.append("filemode", 755) // insecure?
+	form_data.append("filedata", blob)
+
+	upload_request.addEventListener('load', function(event) {
+		// this checksum should be parsed
+		document.getElementById("update_info").innerHTML = "flashing... please wait" // show fancy indicator http://www.ajaxload.info/
+		ubus_request("attendedsysupgrade", "sysupgrade", '{  }', 'done');
+  	});
+
+  	upload_request.addEventListener('error', function(event) {
+		document.getElementById("update_info").innerHTML = "uploading failed, please retry"
+  	});
+
+  	upload_request.open('POST', origin + '/cgi-bin/cgi-upload');
+  	upload_request.send(form_data);
+}
+
+// download image from server once the url was received by image_request
+function download_image(url) {
+	console.log("download_image")
+	document.getElementById("update_button").value = "flashing..."
+	document.getElementById("update_button").disabled = true;
+	var download_request = new XMLHttpRequest();
+	download_request.open("GET", url);
+	download_request.responseType = "arraybuffer";
+
+	download_request.onload = function () {
+		if (this.status === 200) {
+			var blob = new Blob([download_request.response], {type: "application/octet-stream"});
+			upload_image(blob)
+		}
+	};
+	document.getElementById("update_info").innerHTML = "downloading image"
+	download_request.send();
+}
+
+document.onload = setup()
+</script>
+
+<%+footer%>