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Leave initial request open until the viewer is ready to switch to range requests.

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This commit is contained in:
Brendan Dahl 2013-11-18 11:17:26 -08:00
parent 945e370d4f
commit 0385131a9a
5 changed files with 57 additions and 24 deletions
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41
extensions/firefox/components/PdfStreamConverter.js
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@ -439,9 +439,12 @@ var RangedChromeActions = (function RangedChromeActionsClosure() {
* This is for range requests
*/
function RangedChromeActions(
domWindow, contentDispositionFilename, originalRequest) {
domWindow, contentDispositionFilename, originalRequest,
dataListener) {
ChromeActions.call(this, domWindow, contentDispositionFilename);
this.dataListener = dataListener;
this.originalRequest = originalRequest;
this.pdfUrl = originalRequest.URI.spec;
this.contentLength = originalRequest.contentLength;
@ -487,11 +490,15 @@ var RangedChromeActions = (function RangedChromeActionsClosure() {
proto.constructor = RangedChromeActions;
proto.initPassiveLoading = function RangedChromeActions_initPassiveLoading() {
this.originalRequest.cancel(Cr.NS_BINDING_ABORTED);
this.originalRequest = null;
this.domWindow.postMessage({
pdfjsLoadAction: 'supportsRangedLoading',
pdfUrl: this.pdfUrl,
length: this.contentLength
length: this.contentLength,
data: this.dataListener.getData()
}, '*');
this.dataListener = null;
return true;
};
@ -692,8 +699,8 @@ PdfStreamConverter.prototype = {
* 1. asyncConvertData stores the listener
* 2. onStartRequest creates a new channel, streams the viewer
* 3. If range requests are supported:
* 3.1. Suspends and cancels the request so we can issue range
* requests instead.
* 3.1. Leave the request open until the viewer is ready to switch to
* range requests.
*
* If range rquests are not supported:
* 3.1. Read the stream as it's loaded in onDataAvailable to send
@ -779,18 +786,12 @@ PdfStreamConverter.prototype = {
PdfJsTelemetry.onViewerIsUsed();
PdfJsTelemetry.onDocumentSize(aRequest.contentLength);
if (!rangeRequest) {
// Creating storage for PDF data
var contentLength = aRequest.contentLength;
this.dataListener = new PdfDataListener(contentLength);
this.binaryStream = Cc['@mozilla.org/binaryinputstream;1']
.createInstance(Ci.nsIBinaryInputStream);
} else {
// Suspend the request so we're not consuming any of the stream,
// but we can't cancel the request yet. Otherwise, the original
// listener will think we do not want to go the new PDF url
aRequest.suspend();
}
// Creating storage for PDF data
var contentLength = aRequest.contentLength;
this.dataListener = new PdfDataListener(contentLength);
this.binaryStream = Cc['@mozilla.org/binaryinputstream;1']
.createInstance(Ci.nsIBinaryInputStream);
// Create a new channel that is viewer loaded as a resource.
var ioService = Services.io;
@ -816,12 +817,8 @@ PdfStreamConverter.prototype = {
var domWindow = getDOMWindow(channel);
var actions;
if (rangeRequest) {
// We are going to be issuing range requests, so cancel the
// original request
aRequest.resume();
aRequest.cancel(Cr.NS_BINDING_ABORTED);
actions = new RangedChromeActions(domWindow,
contentDispositionFilename, aRequest);
actions = new RangedChromeActions(
domWindow, contentDispositionFilename, aRequest, dataListener);
} else {
actions = new StandardChromeActions(
domWindow, contentDispositionFilename, dataListener);