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addresses #1773, RDF read from disk works once, fails after

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This fixes some issues with streams being closed due to overzealous garbage collection in Firefox 3.6. I'm not sure if this is the same as #1773 or not, but it certainly produces export errors.
This commit is contained in:
Simon Kornblith 2011-02-02 05:42:16 +00:00
parent dc86b67743
commit a9132a2be2
1 changed files with 35 additions and 9 deletions
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44
chrome/content/zotero/xpcom/translation/browser_firefox.js
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@ -100,6 +100,13 @@ Zotero.Translate.SandboxManager.prototype = {
}
}
/**
* This variable holds a reference to all open nsIInputStreams and nsIOutputStreams in the global
* scope at all times. Otherwise, our streams might get garbage collected when we allow other code
* to run during Zotero.wait().
*/
Zotero.Translate.IO.streamsToKeepOpen = [];
/******* (Native) Read support *******/
Zotero.Translate.IO.Read = function(file, mode) {
@ -108,6 +115,7 @@ Zotero.Translate.IO.Read = function(file, mode) {
// open file
this._rawStream = Components.classes["@mozilla.org/network/file-input-stream;1"]
.createInstance(Components.interfaces.nsIFileInputStream);
Zotero.Translate.IO.streamsToKeepOpen.push(this._rawStream);
this._rawStream.init(file, 0x01, 0664, 0);
// start detecting charset
@ -290,9 +298,7 @@ Zotero.Translate.IO.Read.prototype = {
// seek back to the beginning
this._seekToStart();
if(this._allowCharsetOverride) {
this.inputStream = Components.classes["@mozilla.org/intl/converter-input-stream;1"]
.createInstance(Components.interfaces.nsIConverterInputStream);
if(this._allowCharsetOverride) {
try {
this.inputStream.init(this._rawStream, charset, 65535,
Components.interfaces.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);
@ -333,8 +339,12 @@ Zotero.Translate.IO.Read.prototype = {
"reset":function(newMode) {
this._seekToStart();
this.inputStream = Components.classes["@mozilla.org/intl/converter-input-stream;1"]
.createInstance(Components.interfaces.nsIConverterInputStream);
if(!this.inputStream) {
this.inputStream = Components.classes["@mozilla.org/intl/converter-input-stream;1"]
.createInstance(Components.interfaces.nsIConverterInputStream);
Zotero.Translate.IO.streamsToKeepOpen.push(this.inputStream);
}
this.inputStream.init(this._rawStream, this._charset, 65535,
Components.interfaces.nsIConverterInputStream.DEFAULT_REPLACEMENT_CHARACTER);
@ -345,7 +355,12 @@ Zotero.Translate.IO.Read.prototype = {
},
"close":function() {
this.inputStream.close();
Zotero.Translate.IO.streamsToKeepOpen.splice(Zotero.Translate.IO.streamsToKeepOpen.indexOf(this._rawStream), 1);
if(this.inputStream) {
Zotero.Translate.IO.streamsToKeepOpen.splice(Zotero.Translate.IO.streamsToKeepOpen.indexOf(this.inputStream), 1);
}
this._rawStream.close();
}
}
@ -354,6 +369,7 @@ Zotero.Translate.IO.Read.prototype = {
Zotero.Translate.IO.Write = function(file, mode, charset) {
this._rawStream = Components.classes["@mozilla.org/network/file-output-stream;1"]
.createInstance(Components.interfaces.nsIFileOutputStream);
Zotero.Translate.IO.streamsToKeepOpen.push(this._rawStream);
this._rawStream.init(file, 0x02 | 0x08 | 0x20, 0664, 0); // write, create, truncate
this._writtenToStream = false;
if(mode || charset) this.reset(mode, charset);
@ -377,8 +393,12 @@ Zotero.Translate.IO.Write.prototype = {
throw "Translate: setCharacterSet: charset must be a string";
}
this.outputStream = Components.classes["@mozilla.org/intl/converter-output-stream;1"]
.createInstance(Components.interfaces.nsIConverterOutputStream);
if(!this.outputStream) {
this.outputStream = Components.classes["@mozilla.org/intl/converter-output-stream;1"]
.createInstance(Components.interfaces.nsIConverterOutputStream);
Zotero.Translate.IO.streamsToKeepOpen.push(this.outputStream);
}
if(charset == "UTF-8xBOM") charset = "UTF-8";
this.outputStream.init(this._rawStream, charset, 1024, "?".charCodeAt(0));
this._charset = charset;
@ -424,6 +444,12 @@ Zotero.Translate.IO.Write.prototype = {
if(Zotero.Translate.IO.rdfDataModes.indexOf(this._mode) !== -1) {
this.write(this.RDF.serialize());
}
this.outputStream.close();
Zotero.Translate.IO.streamsToKeepOpen.splice(Zotero.Translate.IO.streamsToKeepOpen.indexOf(this._rawStream), 1);
if(this.outputStream) {
Zotero.Translate.IO.streamsToKeepOpen.splice(Zotero.Translate.IO.streamsToKeepOpen.indexOf(this.outputStream), 1);
}
this._rawStream.close();
}
}