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Components.utils.import("resource://gre/modules/XPCOMUtils.jsm");

const IO = {

readFile: function(file, charset) {

var res;

const is = Cc["@mozilla.org/network/file-input-stream;1"]

.createInstance(Ci.nsIFileInputStream );

is.init(file ,0x01, 256 /*0400*/, null);

const sis = Cc["@mozilla.org/scriptableinputstream;1"]

.createInstance(Ci.nsIScriptableInputStream);

sis.init(is);

res = sis.read(sis.available());

is.close();

if (charset !== null) { // use "null" if you want uncoverted data...

const unicodeConverter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]

.createInstance(Ci.nsIScriptableUnicodeConverter);

try {

unicodeConverter.charset = charset || "UTF-8";

} catch(ex) {

unicodeConverter.charset = "UTF-8";

}

res = unicodeConverter.ConvertToUnicode(res);

}

return res;

},

writeFile: function(file, content, charset) {

const unicodeConverter = Cc["@mozilla.org/intl/scriptableunicodeconverter"]

.createInstance(Ci.nsIScriptableUnicodeConverter);

try {

unicodeConverter.charset = charset || "UTF-8";

} catch(ex) {

unicodeConverter.charset = "UTF-8";

}

content = unicodeConverter.ConvertFromUnicode(content);

const os = Cc["@mozilla.org/network/file-output-stream;1"]

.createInstance(Ci.nsIFileOutputStream);

os.init(file, 0x02 | 0x08 | 0x20, 448 /*0700*/, 0);

os.write(content, content.length);

os.close();

},

safeWriteFile: function(file, content, charset) {

var tmp = file.clone();

var name = file.leafName;

tmp.leafName = name + ".tmp";

tmp.createUnique(Ci.nsIFile.NORMAL_FILE_TYPE, file.exists() ? file.permissions : 384 /*0600*/);

this.writeFile(tmp, content, charset);

tmp.moveTo(file.parent, name);

}

};

function nsISupportsWrapper(wrapped) {

this.wrappedJSObject = wrapped;

}

nsISupportsWrapper.prototype = {

QueryInterface: XPCOMUtils.generateQI([])

};

const IOUtil = {

asyncNetworking: true,

proxiedDNS: 0,

attachToChannel: function(channel, key, requestInfo) {

if (channel instanceof Ci.nsIWritablePropertyBag2)

channel.setPropertyAsInterface(key, requestInfo);

},

extractFromChannel: function(channel, key, preserve) {

if (channel instanceof Ci.nsIPropertyBag2) {

let p = channel.get(key);

if (p) {

if (!preserve && (channel instanceof Ci.nsIWritablePropertyBag)) channel.deleteProperty(key);

if (p.wrappedJSObject) return p.wrappedJSObject;

p instanceof Ci.nsIURL || p instanceof Ci.nsIURL;

return p;

}

}

return null;

},

extractInternalReferrer: function(channel) {

if (channel instanceof Ci.nsIPropertyBag2) {

const key = "docshell.internalReferrer";

if (channel.hasKey(key))

try {

return channel.getPropertyAsInterface(key, Ci.nsIURL);

} catch(e) {}

}

return null;

},

extractInternalReferrerSpec: function(channel) {

var ref = this.extractInternalReferrer(channel);

return ref && ref.spec || null;

},

getProxyInfo: function(channel) {

return Ci.nsIProxiedChannel && (channel instanceof Ci.nsIProxiedChannel)

? channel.proxyInfo

: Components.classes["@mozilla.org/network/protocol-proxy-service;1"]

.getService(Components.interfaces.nsIProtocolProxyService)

.resolve(channel.URI, 0);

},

canDoDNS: function(channel) {

if (!channel || IOS.offline) return false;

var proxyInfo = this.getProxyInfo(channel);

switch(this.proxiedDNS) {

case 1:

return !(proxyInfo && (proxyInfo.flags & Ci.nsIProxyInfo.TRANSPARENT_PROXY_RESOLVES_HOST));

case 2:

return true;

default:

return !proxyInfo || proxyInfo.type == "direct";

}

},

abort: function(channel, noNetwork) {

channel.cancel(Components.results.NS_ERROR_ABORT);

},

findWindow: function(channel) {

for each(var cb in [channel.notificationCallbacks,

channel.loadGroup && channel.loadGroup.notificationCallbacks]) {

if (cb instanceof Ci.nsIInterfaceRequestor) {

if (Ci.nsILoadContext) try {

// For Gecko 1.9.1

return cb.getInterface(Ci.nsILoadContext).associatedWindow;

} catch(e) {}

try {

// For Gecko 1.9.0

return cb.getInterface(Ci.nsIDOMWindow);

} catch(e) {}

}

}

return null;

},

readFile: IO.readFile,

writeFile: IO.writeFile,

safeWriteFIle: IO.safeWriteFile,

_protocols: {}, // caching them we gain a 33% speed boost in URI creation :)

newURI: function(url) {

try {

let scheme = url.substring(0, url.indexOf(':'));

return (this._protocols[scheme] ||

(this._protocols[scheme] =

Cc["@mozilla.org/network/protocol;1?name=" + scheme]

.getService(Ci.nsIProtocolHandler)))

.newURI(url, null, null);

} catch(e) {

return IOS.newURI(url, null, null);

}

},

unwrapURL: function(url) {

try {

if (!(url instanceof Ci.nsIURI))

url = this.newURI(url);

switch (url.scheme) {

case "view-source":

return this.unwrapURL(url.path);

case "feed":

let u = url.spec.substring(5);

if (u.substring(0, 2) == '//') u = "http:" + u;

return this.unwrapURL(u);

case "wyciwyg":

return this.unwrapURL(url.path.replace(/^\/\/\d+\//, ""));

case "jar":

if (url instanceof Ci.nsIJARURI)

return this.unwrapURL(url.JARFile);

}

}

catch (e) {}

return url;

},

get _channelFlags() {

delete this._channelFlags;

const constRx = /^[A-Z_]+$/;

const ff = {};

[Ci.nsIHttpChannel, Ci.nsICachingChannel].forEach(function(c) {

for (var p in c) {

if (constRx.test(p)) ff[p] = c[p];

}

});

return this._channelFlags = ff;

},

humanFlags: function(loadFlags) {

var hf = [];

var c = this._channelFlags;

for (var p in c) {

if (loadFlags & c[p]) hf.push(p + "=" + c[p]);

}

return hf.join("\n");

},

queryNotificationCallbacks: function(chan, iid) {

var cb;

try {

cb = chan.notificationCallbacks.getInterface(iid);

if (cb) return cb;

} catch(e) {}

try {

return chan.loadGroup && chan.loadGroup.notificationCallbacks.getInterface(iid);

} catch(e) {}

return null;

},

anonymizeURI: function(uri, cookie) {

if (uri instanceof Ci.nsIURL) {

uri.query = this.anonymizeQS(uri.query, cookie);

} else return this.anonymizeURL(uri, cookie);

return uri;

},

anonymizeURL: function(url, cookie) {

var parts = url.split("?");

if (parts.length < 2) return url;

parts[1] = this.anonymizeQS(parts[1], cookie);

return parts.join("?");

},

_splitName: function(nv) nv.split("=")[0],

_qsRx: /[&=]/,

_anonRx: /(?:auth|s\w+(?:id|key)$)/,

anonymizeQS: function(qs, cookie) {

if (!qs) return qs;

if (!this._qsRx.test(qs)) return '';

var cookieNames, hasCookies;

if ((hasCookies = !!cookie)) cookieNames = cookie.split(/\s*;\s*/).map(this._splitName);

let parms = qs.split("&");

for (j = parms.length; j-- > 0;) {

let nv = parms[j].split("=");

let name = nv[0];

if (this._anonRx.test(name) || cookie && cookieNames.indexOf(name) > -1)

parms.splice(j, 1);

}

return parms.join("&");

},

get TLDService() {

delete this.TLDService;

return this.TLDService = Cc["@mozilla.org/network/effective-tld-service;1"].getService(Ci.nsIEffectiveTLDService);

}

};