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Bug 707090 - DOMApplicationRegistry (Webapps.jsm) must not do any mainthread I/O [r=mfinkle]

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This commit is contained in:
Fabrice Desré 2011-12-05 15:26:18 -08:00
parent 4232b822bf
commit 5432f23f1a
1 changed files with 58 additions and 34 deletions
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92
dom/base/Webapps.jsm
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@ -74,27 +74,38 @@ let DOMApplicationRegistry = {
if (!this.appsFile.exists())
return;
this._loadJSONAsync(this.appsFile, (function(aData) { this.webapps = aData; }).bind(this));
},
_loadJSONAsync: function(aFile, aCallback) {
try {
let channel = NetUtil.newChannel(this.appsFile);
let channel = NetUtil.newChannel(aFile);
channel.contentType = "application/json";
let self = this;
NetUtil.asyncFetch(channel, function(aStream, aResult) {
if (!Components.isSuccessCode(aResult)) {
Cu.reportError("DOMApplicationRegistry: Could not read from json file " + this.appsFile.path);
Cu.reportError("DOMApplicationRegistry: Could not read from json file " + aFile.path);
if (aCallback)
aCallback(null);
return;
}
// Read json file into a string
let data = null;
try {
self.webapps = JSON.parse(NetUtil.readInputStreamToString(aStream, aStream.available()) || "");
data = JSON.parse(NetUtil.readInputStreamToString(aStream, aStream.available()) || "");
aStream.close();
if (aCallback)
aCallback(data);
} catch (ex) {
Cu.reportError("DOMApplicationRegistry: Could not parse JSON: " + ex);
if (aCallback)
aCallback(null);
}
});
} catch (ex) {
Cu.reportError("DOMApplicationRegistry: Could not read from " + aFile.path + " : " + ex);
if (aCallback)
aCallback(null);
}
},
@ -202,30 +213,24 @@ let DOMApplicationRegistry = {
return null;
},
_readManifest: function(aId) {
/**
* Asynchronously reads a list of manifests
*/
_readManifests: function(aData, aFinalCallback, aIndex) {
let index = aIndex || 0;
let id = aData[index].id;
let file = this.appsDir.clone();
file.append(aId);
file.append(id);
file.append("manifest.json");
let data = "";
let fstream = Cc["@mozilla.org/network/file-input-stream;1"].createInstance(Ci.nsIFileInputStream);
var cstream = Cc["@mozilla.org/intl/converter-input-stream;1"].createInstance(Ci.nsIConverterInputStream);
fstream.init(file, -1, 0, 0);
cstream.init(fstream, "UTF-8", 0, 0);
let (str = {}) {
let read = 0;
do {
read = cstream.readString(0xffffffff, str); // read as much as we can and put it in str.value
data += str.value;
} while (read != 0);
}
cstream.close(); // this closes fstream
try {
return JSON.parse(data);
} catch(e) {
return null;
}
this._loadJSONAsync(file, (function(aJSON) {
aData[index].manifest = aJSON;
if (index == aData.length - 1)
aFinalCallback(aData);
else
this._readManifests(aData, aFinalCallback, index + 1);
}).bind(this));
},
uninstall: function(aData) {
for (let id in this.webapps) {
let app = this.webapps[id];
@ -245,13 +250,14 @@ let DOMApplicationRegistry = {
enumerate: function(aData) {
aData.apps = [];
let tmp = [];
let id = this._appId(aData.origin);
// if it's an app, add itself to the result
if (id) {
let app = this._cloneAppObject(this.webapps[id]);
app.manifest = this._readManifest(id);
aData.apps.push(app);
tmp.push({ id: id });
}
// check if it's a store.
@ -269,13 +275,17 @@ let DOMApplicationRegistry = {
for (id in this.webapps) {
let app = this._cloneAppObject(this.webapps[id]);
if (app.installOrigin == aData.origin) {
app.manifest = this._readManifest(id);
aData.apps.push(app);
tmp.push({ id: id });
}
}
}
this.mm.sendAsyncMessage("Webapps:Enumerate:Return:OK", aData);
this._readManifests(tmp, (function(aResult) {
for (let i = 0; i < aResult.length; i++)
aData.apps[i].manifest = aResult[i].manifest;
this.mm.sendAsyncMessage("Webapps:Enumerate:Return:OK", aData);
}).bind(this));
},
denyEnumerate: function(aData) {
@ -284,21 +294,35 @@ let DOMApplicationRegistry = {
enumerateAll: function(aData) {
aData.apps = [];
let tmp = [];
for (id in this.webapps) {
let app = this._cloneAppObject(this.webapps[id]);
app.manifest = this._readManifest(id);
aData.apps.push(app);
tmp.push({ id: id });
}
this.mm.sendAsyncMessage("Webapps:Enumerate:Return:OK", aData);
this._readManifests(tmp, (function(aResult) {
for (let i = 0; i < aResult.length; i++)
aData.apps[i].manifest = aResult[i].manifest;
this.mm.sendAsyncMessage("Webapps:Enumerate:Return:OK", aData);
}).bind(this));
},
getManifestFor: function(aOrigin) {
getManifestFor: function(aOrigin, aCallback) {
if (!aCallback)
return;
let id = this._appId(aOrigin);
if (!id)
return null;
return this._readManifest(id);
if (!id) {
aCallback(null);
return;
}
this._readManifests([{ id: id }], function(aResult) {
aCallback(aResult[0].manifest);
});
}
};