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use python child process to handle cache ops

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This commit is contained in:
FinnHornhoover 2023-10-15 22:40:44 +03:00
parent f28c9c0bb8
commit 48efd00a4a
5 changed files with 141 additions and 1069 deletions
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253
assets/js/server-selector.js
View File

@ -1,13 +1,15 @@
var ipc = require("ipc");
var remote = require("remote");
var remotefs = remote.require("fs-extra");
var dns = remote.require("dns");
var path = remote.require("path");
var dialog = remote.require("dialog");
var spawn = require("child_process").spawn;
var userData = remote.require("app").getPath("userData");
var configPath = path.join(userData, "config.json");
var serversPath = path.join(userData, "servers.json");
var versionsPath = path.join(userData, "versions.json");
var hashPath = path.join(userData, "hashes.json");
var cacheRoot = path.join(
userData,
"/../../LocalLow/Unity/Web Player/Cache"
@ -71,6 +73,8 @@ function addServer() {
jsonToModify["servers"].push(server);
console.log(serversPath);
console.log(JSON.stringify(jsonToModify, null, 4));
remotefs.writeFileSync(serversPath, JSON.stringify(jsonToModify, null, 4));
loadServerList();
}
@ -186,27 +190,21 @@ function getCacheLabelText(sizes) {
}
function getCacheInfoCell(versionString, cacheMode) {
var downloadFuncName = "download" + cacheMode.charAt(0).toUpperCase() + cacheMode.slice(1) + "Cache";
var deleteFuncName = "delete" + cacheMode.charAt(0).toUpperCase() + cacheMode.slice(1) + "Cache";
var divID = getCacheElemID(versionString, cacheMode, "div");
var labelID = getCacheElemID(versionString, cacheMode, "label");
var settings = {
download: {
fn: downloadFuncName,
icon: "fas fa-download",
class: "btn btn-success mr-1",
tooltip: "Download Cache"
},
fix: {
fn: downloadFuncName,
icon: "fas fa-hammer",
class: "btn btn-warning mr-1",
tooltip: "Fix Altered Files in Cache"
},
delete: {
fn: deleteFuncName,
icon: "fas fa-trash-alt",
class: "btn btn-danger mr-1",
tooltip: "Delete Cache"
@ -219,6 +217,7 @@ function getCacheInfoCell(versionString, cacheMode) {
var labelCache = document.createElement("label");
labelCache.setAttribute("id", labelID);
labelCache.setAttribute("for", divID);
labelCache.innerHTML = " 0.00 GB / 0.00 GB"
var divCacheButtons = document.createElement("div");
divCacheButtons.setAttribute("id", labelID);
@ -238,7 +237,7 @@ function getCacheInfoCell(versionString, cacheMode) {
buttonCache.setAttribute("class", config.class);
buttonCache.setAttribute("title", config.tooltip);
buttonCache.setAttribute("type", "button");
buttonCache.setAttribute("onclick", config.fn + "(\"" + versionString + "\");");
buttonCache.setAttribute("onclick", "handleCache(\"" + buttonMode + "\", \"" + versionString + "\", \"" + cacheMode + "\");");
buttonCache.appendChild(iconItalic);
divCacheButtons.appendChild(buttonCache);
@ -251,11 +250,128 @@ function getCacheInfoCell(versionString, cacheMode) {
return cellCache;
}
function startHashCheck(versionString, cacheMode) {
ipc.send("hash-check", {
localDir: (cacheMode === "offline") ? offlineRoot : cacheRoot,
cacheMode: cacheMode,
versionString: versionString,
function storageLoadingStart(vString, cMode) {
var versionStrings = [];
$.each(versionArray, function (key, value) {
if (vString) {
if (vString === value.name)
versionStrings.push(value.name);
} else {
versionStrings.push(value.name);
}
});
var cacheModes = (cMode) ? [cMode] : ["offline", "playable"];
$.each(versionStrings, function (vKey, versionString) {
$.each(cacheModes, function (cKey, cacheMode) {
var buttonDelete = document.getElementById(getCacheButtonID(versionString, cacheMode, "delete"));
var buttonDownload = document.getElementById(getCacheButtonID(versionString, cacheMode, "download"));
var buttonFix = document.getElementById(getCacheButtonID(versionString, cacheMode, "fix"));
if (!buttonDelete) return;
buttonDelete.setAttribute("disabled", "");
buttonDelete.children[0].setAttribute("class", "fas fa-spinner fa-spin fa-fw");
if (cacheMode === "offline") {
buttonDownload.setAttribute("disabled", "");
buttonDownload.children[0].setAttribute("class", "fas fa-spinner fa-spin fa-fw");
buttonFix.setAttribute("disabled", "");
buttonFix.children[0].setAttribute("class", "fas fa-spinner fa-spin fa-fw");
}
});
});
}
function storageLoadingUpdate(allSizes) {
$.each(allSizes, function (versionString, vSizes) {
$.each(vSizes, function (cacheMode, sizes) {
var label = document.getElementById(getCacheElemID(versionString, cacheMode, "label"));
if (label)
label.innerHTML = getCacheLabelText(sizes);
});
});
}
function storageLoadingComplete(allSizes) {
$.each(allSizes, function (versionString, vSizes) {
$.each(vSizes, function (cacheMode, sizes) {
var buttonDelete = document.getElementById(getCacheButtonID(versionString, cacheMode, "delete"));
var buttonDownload = document.getElementById(getCacheButtonID(versionString, cacheMode, "download"));
var buttonFix = document.getElementById(getCacheButtonID(versionString, cacheMode, "fix"));
if (!buttonDelete) return;
buttonDelete.children[0].setAttribute("class", "fas fa-trash-alt");
if (cacheMode === "offline") {
buttonDownload.children[0].setAttribute("class", "fas fa-download");
buttonFix.children[0].setAttribute("class", "fas fa-hammer");
}
if (sizes.intact > 0 || sizes.altered > 0) {
buttonDelete.removeAttribute("disabled");
if (cacheMode === "offline") {
buttonDownload.setAttribute("disabled", "");
if (sizes.altered > 0 || sizes.intact < sizes.total) {
buttonFix.removeAttribute("disabled");
}
}
} else {
buttonDelete.setAttribute("disabled", "");
if (cacheMode === "offline") {
buttonDownload.removeAttribute("disabled");
buttonFix.setAttribute("disabled", "");
}
}
});
});
}
function handleCache(mode, versionString, cacheMode, callback) {
var versions = versionArray.filter(function (obj) {
return obj.name === versionString;
});
var cdnRoot = (versions.length === 0) ?
"http://cdn.dexlabs.systems/ff/big" :
path.dirname(versions[0].url);
var executable = path.join(__dirname, "lib", "cache_handler.exe");
var args = [
"--mode", (mode === "fix") ? "download" : mode,
"--hash-file", hashPath,
"--playable-root", cacheRoot,
"--offline-root", offlineRoot,
"--user-dir", userData,
"--cdn-root", cdnRoot,
"--cache-mode", (cacheMode) ? cacheMode : "all",
"--cache-version", (versionString) ? versionString : "all"
];
storageLoadingStart(versionString, cacheMode);
var child = spawn(executable, args, { stdio: [null, null, null, "ipc"] });
var lastSizes = {};
child.on("message", function (sizes) {
lastSizes = sizes;
storageLoadingUpdate(lastSizes);
});
child.on("exit", function (code, signal) {
if (code !== 0 || signal) {
dialog.showErrorBox(
"Sorry!",
"Process \"" + mode + "\" failed with code " + code + " and signal " + signal + "."
);
}
storageLoadingComplete(lastSizes);
if (callback)
callback(lastSizes);
});
}
@ -282,42 +398,11 @@ function loadCacheList() {
row.appendChild(cellOfflineCache);
$("#cache-tablebody").append(row);
});
setTimeout(function () {
startHashCheck(value.name, "playable");
startHashCheck(value.name, "offline");
handleCache("hash-check");
}, 0);
})
}
function deletePlayableCache(versionString) {
ipc.send("delete-files", {
localDir: cacheRoot,
cacheMode: "playable",
versionString: versionString,
});
}
function downloadOfflineCache(versionString) {
var version = versionArray.filter(function (value) {
return value.name === versionString;
})[0];
// download-files will run hash-check after download
ipc.send("download-files", {
cdnDir: version.url,
localDir: offlineRoot,
cacheMode: "offline",
versionString: versionString,
});
}
function deleteOfflineCache(versionString) {
ipc.send("delete-files", {
localDir: offlineRoot,
cacheMode: "offline",
versionString: versionString,
});
}
function performCacheSwap(newVersion) {
@ -382,16 +467,19 @@ function prepGameInfo(serverUUID) {
}
}
ipc.send("adjust-game-info", {
localDir: offlineRoot,
serverInfo: JSON.stringify(serverInfo),
versionInfo: JSON.stringify(versionInfo),
handleCache("hash-check", versionInfo.name, "offline", function (sizes) {
var versionURL = (sizes.intact < sizes.total) ?
versionInfo.url :
"file:///" + path.join(offlineRoot, versionInfo.name).replace(/\\/g, "/") + "/";
console.log("Cache will expand from " + versionURL);
setGameInfo(serverInfo, versionURL);
});
}
// For writing loginInfo.php, assetInfo.php, etc.
function setGameInfo(serverInfo, versionInfo) {
window.assetUrl = versionInfo.url; // game-client.js needs to access this
function setGameInfo(serverInfo, versionURL) {
window.assetUrl = versionURL; // game-client.js needs to access this
remotefs.writeFileSync(path.join(__dirname, "assetInfo.php"), assetUrl);
if (serverInfo.hasOwnProperty("endpoint")) {
@ -524,64 +612,3 @@ $("#of-deleteservermodal").on("show.bs.modal", function (e) {
})[0];
$("#deleteserver-servername").html(result.description);
});
ipc.on("storage-loading-start", function (arg) {
var buttonDelete = document.getElementById(getCacheButtonID(arg.versionString, arg.cacheMode, "delete"));
var buttonDownload = document.getElementById(getCacheButtonID(arg.versionString, arg.cacheMode, "download"));
var buttonFix = document.getElementById(getCacheButtonID(arg.versionString, arg.cacheMode, "fix"));
var label = document.getElementById(getCacheElemID(arg.versionString, arg.cacheMode, "label"));
buttonDelete.setAttribute("disabled", "");
buttonDelete.children[0].setAttribute("class", "fas fa-spinner fa-spin fa-fw");
if (arg.cacheMode === "offline") {
buttonDownload.setAttribute("disabled", "");
buttonDownload.children[0].setAttribute("class", "fas fa-spinner fa-spin fa-fw");
buttonFix.setAttribute("disabled", "");
buttonFix.children[0].setAttribute("class", "fas fa-spinner fa-spin fa-fw");
}
label.innerHTML = getCacheLabelText(arg.sizes);
});
ipc.on("storage-label-update", function (arg) {
var label = document.getElementById(getCacheElemID(arg.versionString, arg.cacheMode, "label"));
label.innerHTML = getCacheLabelText(arg.sizes);
});
ipc.on("storage-loading-complete", function (arg) {
var buttonDelete = document.getElementById(getCacheButtonID(arg.versionString, arg.cacheMode, "delete"));
var buttonDownload = document.getElementById(getCacheButtonID(arg.versionString, arg.cacheMode, "download"));
var buttonFix = document.getElementById(getCacheButtonID(arg.versionString, arg.cacheMode, "fix"));
buttonDelete.children[0].setAttribute("class", "fas fa-trash-alt");
if (arg.cacheMode === "offline") {
buttonDownload.children[0].setAttribute("class", "fas fa-download");
buttonFix.children[0].setAttribute("class", "fas fa-hammer");
}
if (arg.sizes.intact > 0 || arg.sizes.altered > 0) {
buttonDelete.removeAttribute("disabled");
if (arg.cacheMode === "offline") {
buttonDownload.setAttribute("disabled", "");
if (arg.sizes.altered > 0 || arg.sizes.intact < arg.sizes.total) {
buttonFix.removeAttribute("disabled");
}
}
} else {
buttonDelete.setAttribute("disabled", "");
if (arg.cacheMode === "offline") {
buttonDownload.removeAttribute("disabled");
buttonFix.setAttribute("disabled", "");
}
}
});
ipc.on("set-game-info", function (arg) {
setGameInfo(JSON.parse(arg.serverInfo), JSON.parse(arg.versionInfo));
});

281
index.js
View File

@ -4,9 +4,6 @@ var fs = require("fs-extra");
var ipc = require("ipc");
var os = require("os");
var path = require("path");
var async = require("async");
var createHash = require("crypto").createHash;
var spawn = require("child_process").spawn;
var BrowserWindow = require("browser-window");
var mainWindow = null;
@ -33,9 +30,6 @@ var serversPath = path.join(userData, "servers.json");
var versionsPath = path.join(userData, "versions.json");
var hashPath = path.join(userData, "hashes.json");
var versionHashes;
var versionSizes;
function initialSetup(firstTime) {
if (!firstTime) {
// Migration from pre-1.4
@ -72,26 +66,6 @@ app.on("window-all-closed", function () {
});
app.on("ready", function () {
versionHashes = fs.readJsonSync(hashPath);
versionSizes = {}
Object.keys(versionHashes).forEach(function (versionString) {
var value = versionHashes[versionString];
versionSizes[versionString] = {
playable: {
intact: 0,
altered: 0,
total: value.playable_size,
},
offline: {
intact: 0,
altered: 0,
total: value.offline_size,
},
};
});
// Check just in case the user forgot to extract the zip.
zipCheck = app.getPath("exe").includes(os.tmpdir());
if (zipCheck) {
@ -143,124 +117,6 @@ app.on("ready", function () {
mainWindow.on("closed", function () {
mainWindow = null;
});
ipc.on("download-files", function (event, arg) {
var currentSizes = versionSizes[arg.versionString][arg.cacheMode];
currentSizes.intact = 0;
currentSizes.altered = 0;
mainWindow.webContents.send("storage-loading-start", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
downloadFiles(
arg.cdnDir,
getSwappedPathSync(arg.localDir, arg.versionString), // this shouldn't matter, for consistency only
versionHashes[arg.versionString][arg.cacheMode],
function (sizes) {
currentSizes.intact += sizes.intact;
currentSizes.altered += sizes.altered;
mainWindow.webContents.send("storage-label-update", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
},
function () {
mainWindow.webContents.send("storage-loading-complete", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
},
function (err) {
dialog.showErrorBox("Error!", "Download was unsuccessful:\n" + err);
}
);
});
ipc.on("delete-files", function (event, arg) {
var deleteDir = getSwappedPathSync(arg.localDir, arg.versionString);
if (arg.cacheMode === "playable" && path.basename(deleteDir) === "Offline") {
dialog.showErrorBox("Error!", "Cannot delete Offline directory as a playable cache!");
return;
}
var currentSizes = versionSizes[arg.versionString][arg.cacheMode];
currentSizes.intact = 0;
currentSizes.altered = 0;
mainWindow.webContents.send("storage-loading-start", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
fs.removeSync(deleteDir);
console.log(arg.versionString + " (" + arg.cacheMode + ") has been removed!");
mainWindow.webContents.send("storage-loading-complete", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
});
ipc.on("hash-check", function (event, arg) {
var currentSizes = versionSizes[arg.versionString][arg.cacheMode];
currentSizes.intact = 0;
currentSizes.altered = 0;
mainWindow.webContents.send("storage-loading-start", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
checkHashes(
getSwappedPathSync(arg.localDir, arg.versionString),
versionHashes[arg.versionString][arg.cacheMode],
function (sizes) {
currentSizes.intact += sizes.intact;
currentSizes.altered += sizes.altered;
mainWindow.webContents.send("storage-label-update", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
},
function () {
mainWindow.webContents.send("storage-loading-complete", {
cacheMode: arg.cacheMode,
versionString: arg.versionString,
sizes: currentSizes,
});
},
function (err) {
dialog.showErrorBox("Error!", "Could not verify file integrity:\n" + err);
}
);
});
ipc.on("adjust-game-info", function (event, arg) {
var serverInfo = JSON.parse(arg.serverInfo);
var versionInfo = JSON.parse(arg.versionInfo);
var currentSizes = versionSizes[versionInfo.name]["offline"];
var localURL = "file:///" + path.join(arg.localDir, versionInfo.name).replace(/\\/g, "/") + "/";
mainWindow.webContents.send("set-game-info", {
serverInfo: JSON.stringify(serverInfo),
versionInfo: JSON.stringify({
name: versionInfo.name,
url: (currentSizes.intact === currentSizes.total) ? localURL : versionInfo.url,
}),
});
});
});
function showMainWindow() {
@ -311,140 +167,3 @@ function showMainWindow() {
}
});
}
function getSwappedPathSync(localDir, versionString) {
var currentCache = path.join(localDir, "FusionFall");
var versionCache = path.join(localDir, versionString);
var record = path.join(userData, ".lastver");
if (!fs.existsSync(versionCache) &&
fs.existsSync(currentCache) &&
fs.existsSync(record) &&
versionString === fs.readFileSync(record, (encoding = "utf8"))) {
versionCache = currentCache;
}
return versionCache;
}
function downloadFile(cdnDir, localDir, relativePath, fileHash, callback, updateCallback) {
var nginxUrl = cdnDir + "/" + relativePath;
var localPath = path.join(localDir, relativePath);
var dirName = path.dirname(localPath);
// define the download function
var downloader = function () {
var child = spawn("lib/wget.exe", ["-q", "-P", dirName, nginxUrl]);
child.on("exit", function (code, signal) {
if (code === 0 && !signal) {
checkHash(localDir, relativePath, fileHash, callback, updateCallback);
} else {
callback(new Error("Download process exited with code " + code + " and signal " + signal));
}
});
child.on("error", callback);
};
// Create directories if they don't exist
fs.ensureDir(dirName, function (createDirErr) {
if (createDirErr) {
console.log("Could not create path " + dirName + ": " + createDirErr);
callback(createDirErr);
return;
}
// start with the initial file check, call downloader if necessary
checkHash(
localDir,
relativePath,
fileHash,
function (err) {
if (err) {
if (err.code === "ENOENT") {
downloader();
} else {
callback(err);
}
}
// allow the happy-path to continue
},
function (sizes) {
if (sizes.intact === 0) {
downloader();
} else {
updateCallback(sizes);
callback();
}
}
);
});
}
// Function to download multiple files in parallel
function downloadFiles(cdnDir, localDir, hashes, updateCallback, allDoneCallback, errorCallback) {
async.eachLimit(
Object.keys(hashes),
5, // Number of parallel downloads
function (relativePath, callback) {
downloadFile(cdnDir, localDir, relativePath, hashes[relativePath], callback, updateCallback);
},
function (err) {
if (err) {
console.log("Download failed: " + err);
errorCallback(err);
} else {
console.log("All files downloaded successfully.");
allDoneCallback();
}
}
);
}
function checkHash(localDir, relativePath, fileHash, callback, updateCallback, skipMissing) {
var localPath = path.join(localDir, relativePath);
var chunkSize = 1 << 16;
var totalCount = 0;
var hash = createHash("sha256");
var fileStream = fs.createReadStream(localPath, { bufferSize: chunkSize });
fileStream.on("error", function (err) {
callback((skipMissing && err.code === "ENOENT") ? null : err);
});
fileStream.on("data", function (data) {
hash.update(data);
totalCount += data.length;
});
fileStream.on("end", function () {
var sizes = { intact: 0, altered: 0 };
var state = (fileHash !== hash.digest(encoding="hex")) ? "altered" : "intact";
sizes[state] = totalCount;
updateCallback(sizes);
callback();
});
}
function checkHashes(localDir, hashes, updateCallback, allDoneCallback, errorCallback) {
async.eachLimit(
Object.keys(hashes),
20,
function (relativePath, callback) {
checkHash(localDir, relativePath, hashes[relativePath], callback, updateCallback, (skipMissing = true));
},
function (err) {
if (err) {
console.log("Hash check failed: " + err);
errorCallback(err);
} else {
allDoneCallback();
}
}
);
}

674
lib/WGET-LICENSE.txt
View File

@ -1,674 +0,0 @@
GNU GENERAL PUBLIC LICENSE
Version 3, 29 June 2007
Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The GNU General Public License is a free, copyleft license for
software and other kinds of works.
The licenses for most software and other practical works are designed
to take away your freedom to share and change the works. By contrast,
the GNU General Public License is intended to guarantee your freedom to
share and change all versions of a program--to make sure it remains free
software for all its users. We, the Free Software Foundation, use the
GNU General Public License for most of our software; it applies also to
any other work released this way by its authors. You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
price. Our General Public Licenses are designed to make sure that you
have the freedom to distribute copies of free software (and charge for
them if you wish), that you receive source code or can get it if you
want it, that you can change the software or use pieces of it in new
free programs, and that you know you can do these things.
To protect your rights, we need to prevent others from denying you
these rights or asking you to surrender the rights. Therefore, you have
certain responsibilities if you distribute copies of the software, or if
you modify it: responsibilities to respect the freedom of others.
For example, if you distribute copies of such a program, whether
gratis or for a fee, you must pass on to the recipients the same
freedoms that you received. You must make sure that they, too, receive
or can get the source code. And you must show them these terms so they
know their rights.
Developers that use the GNU GPL protect your rights with two steps:
(1) assert copyright on the software, and (2) offer you this License
giving you legal permission to copy, distribute and/or modify it.
For the developers' and authors' protection, the GPL clearly explains
that there is no warranty for this free software. For both users' and
authors' sake, the GPL requires that modified versions be marked as
changed, so that their problems will not be attributed erroneously to
authors of previous versions.
Some devices are designed to deny users access to install or run
modified versions of the software inside them, although the manufacturer
can do so. This is fundamentally incompatible with the aim of
protecting users' freedom to change the software. The systematic
pattern of such abuse occurs in the area of products for individuals to
use, which is precisely where it is most unacceptable. Therefore, we
have designed this version of the GPL to prohibit the practice for those
products. If such problems arise substantially in other domains, we
stand ready to extend this provision to those domains in future versions
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Finally, every program is threatened constantly by software patents.
States should not allow patents to restrict development and use of
software on general-purpose computers, but in those that do, we wish to
avoid the special danger that patents applied to a free program could
make it effectively proprietary. To prevent this, the GPL assures that
patents cannot be used to render the program non-free.
The precise terms and conditions for copying, distribution and
modification follow.
TERMS AND CONDITIONS
0. Definitions.
"This License" refers to version 3 of the GNU General Public License.
"Copyright" also means copyright-like laws that apply to other kinds of
works, such as semiconductor masks.
"The Program" refers to any copyrightable work licensed under this
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To "modify" a work means to copy from or adapt all or part of the work
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A "covered work" means either the unmodified Program or a work based
on the Program.
To "propagate" a work means to do anything with it that, without
permission, would make you directly or secondarily liable for
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To "convey" a work means any kind of propagation that enables other
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An interactive user interface displays "Appropriate Legal Notices"
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The Corresponding Source need not include anything that users
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The Corresponding Source for a work in source code form is that
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All rights granted under this License are granted for the term of
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You may convey verbatim copies of the Program's source code as you
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unpacking, reading or copying.
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"Additional permissions" are terms that supplement the terms of this
License by making exceptions from one or more of its conditions.
Additional permissions that are applicable to the entire Program shall
be treated as though they were included in this License, to the extent
that they are valid under applicable law. If additional permissions
apply only to part of the Program, that part may be used separately
under those permissions, but the entire Program remains governed by
this License without regard to the additional permissions.
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remove any additional permissions from that copy, or from any part of
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Notwithstanding any other provision of this License, for material you
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a) Disclaiming warranty or limiting liability differently from the
terms of sections 15 and 16 of this License; or
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author attributions in that material or in the Appropriate Legal
Notices displayed by works containing it; or
c) Prohibiting misrepresentation of the origin of that material, or
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All other non-permissive additional terms are considered "further
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received it, or any part of it, contains a notice stating that it is
governed by this License along with a term that is a further
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a further restriction but permits relicensing or conveying under this
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Additional terms, permissive or non-permissive, may be stated in the
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the above requirements apply either way.
8. Termination.
You may not propagate or modify a covered work except as expressly
provided under this License. Any attempt otherwise to propagate or
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this License (including any patent licenses granted under the third
paragraph of section 11).
However, if you cease all violation of this License, then your
license from a particular copyright holder is reinstated (a)
provisionally, unless and until the copyright holder explicitly and
finally terminates your license, and (b) permanently, if the copyright
holder fails to notify you of the violation by some reasonable means
prior to 60 days after the cessation.
Moreover, your license from a particular copyright holder is
reinstated permanently if the copyright holder notifies you of the
violation by some reasonable means, this is the first time you have
received notice of violation of this License (for any work) from that
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your receipt of the notice.
Termination of your rights under this section does not terminate the
licenses of parties who have received copies or rights from you under
this License. If your rights have been terminated and not permanently
reinstated, you do not qualify to receive new licenses for the same
material under section 10.
9. Acceptance Not Required for Having Copies.
You are not required to accept this License in order to receive or
run a copy of the Program. Ancillary propagation of a covered work
occurring solely as a consequence of using peer-to-peer transmission
to receive a copy likewise does not require acceptance. However,
nothing other than this License grants you permission to propagate or
modify any covered work. These actions infringe copyright if you do
not accept this License. Therefore, by modifying or propagating a
covered work, you indicate your acceptance of this License to do so.
10. Automatic Licensing of Downstream Recipients.
Each time you convey a covered work, the recipient automatically
receives a license from the original licensors, to run, modify and
propagate that work, subject to this License. You are not responsible
for enforcing compliance by third parties with this License.
An "entity transaction" is a transaction transferring control of an
organization, or substantially all assets of one, or subdividing an
organization, or merging organizations. If propagation of a covered
work results from an entity transaction, each party to that
transaction who receives a copy of the work also receives whatever
licenses to the work the party's predecessor in interest had or could
give under the previous paragraph, plus a right to possession of the
Corresponding Source of the work from the predecessor in interest, if
the predecessor has it or can get it with reasonable efforts.
You may not impose any further restrictions on the exercise of the
rights granted or affirmed under this License. For example, you may
not impose a license fee, royalty, or other charge for exercise of
rights granted under this License, and you may not initiate litigation
(including a cross-claim or counterclaim in a lawsuit) alleging that
any patent claim is infringed by making, using, selling, offering for
sale, or importing the Program or any portion of it.
11. Patents.
A "contributor" is a copyright holder who authorizes use under this
License of the Program or a work on which the Program is based. The
work thus licensed is called the contributor's "contributor version".
A contributor's "essential patent claims" are all patent claims
owned or controlled by the contributor, whether already acquired or
hereafter acquired, that would be infringed by some manner, permitted
by this License, of making, using, or selling its contributor version,
but do not include claims that would be infringed only as a
consequence of further modification of the contributor version. For
purposes of this definition, "control" includes the right to grant
patent sublicenses in a manner consistent with the requirements of
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Each contributor grants you a non-exclusive, worldwide, royalty-free
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make, use, sell, offer for sale, import and otherwise run, modify and
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In the following three paragraphs, a "patent license" is any express
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(such as an express permission to practice a patent or covenant not to
sue for patent infringement). To "grant" such a patent license to a
party means to make such an agreement or commitment not to enforce a
patent against the party.
If you convey a covered work, knowingly relying on a patent license,
and the Corresponding Source of the work is not available for anyone
to copy, free of charge and under the terms of this License, through a
publicly available network server or other readily accessible means,
then you must either (1) cause the Corresponding Source to be so
available, or (2) arrange to deprive yourself of the benefit of the
patent license for this particular work, or (3) arrange, in a manner
consistent with the requirements of this License, to extend the patent
license to downstream recipients. "Knowingly relying" means you have
actual knowledge that, but for the patent license, your conveying the
covered work in a country, or your recipient's use of the covered work
in a country, would infringe one or more identifiable patents in that
country that you have reason to believe are valid.
If, pursuant to or in connection with a single transaction or
arrangement, you convey, or propagate by procuring conveyance of, a
covered work, and grant a patent license to some of the parties
receiving the covered work authorizing them to use, propagate, modify
or convey a specific copy of the covered work, then the patent license
you grant is automatically extended to all recipients of the covered
work and works based on it.
A patent license is "discriminatory" if it does not include within
the scope of its coverage, prohibits the exercise of, or is
conditioned on the non-exercise of one or more of the rights that are
specifically granted under this License. You may not convey a covered
work if you are a party to an arrangement with a third party that is
in the business of distributing software, under which you make payment
to the third party based on the extent of your activity of conveying
the work, and under which the third party grants, to any of the
parties who would receive the covered work from you, a discriminatory
patent license (a) in connection with copies of the covered work
conveyed by you (or copies made from those copies), or (b) primarily
for and in connection with specific products or compilations that
contain the covered work, unless you entered into that arrangement,
or that patent license was granted, prior to 28 March 2007.
Nothing in this License shall be construed as excluding or limiting
any implied license or other defenses to infringement that may
otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<https://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<https://www.gnu.org/licenses/why-not-lgpl.html>.

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