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Implement streaming using moz-chunk-arraybuffer

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This commit is contained in:
Yury Delendik 2014-09-05 20:02:54 -05:00
parent 477efd52bc
commit c3f191a27c
10 changed files with 274 additions and 77 deletions
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51
src/core/network.js
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@ -68,11 +68,11 @@ var NetworkManager = (function NetworkManagerClosure() {
return data;
}
var length = data.length;
var buffer = new Uint8Array(length);
var array = new Uint8Array(length);
for (var i = 0; i < length; i++) {
buffer[i] = data.charCodeAt(i) & 0xFF;
array[i] = data.charCodeAt(i) & 0xFF;
}
return buffer;
return array.buffer;
}
NetworkManager.prototype = {
@ -87,11 +87,11 @@ var NetworkManager = (function NetworkManagerClosure() {
return this.request(args);
},
requestFull: function NetworkManager_requestRange(listeners) {
requestFull: function NetworkManager_requestFull(listeners) {
return this.request(listeners);
},
request: function NetworkManager_requestRange(args) {
request: function NetworkManager_request(args) {
var xhr = this.getXhr();
var xhrId = this.currXhrId++;
var pendingRequest = this.pendingRequests[xhrId] = {
@ -115,27 +115,54 @@ var NetworkManager = (function NetworkManagerClosure() {
pendingRequest.expectedStatus = 200;
}
xhr.responseType = 'arraybuffer';
if (args.onProgress) {
xhr.onprogress = args.onProgress;
if (args.onProgressiveData) {
xhr.responseType = 'moz-chunked-arraybuffer';
if (xhr.responseType === 'moz-chunked-arraybuffer') {
pendingRequest.onProgressiveData = args.onProgressiveData;
pendingRequest.mozChunked = true;
} else {
xhr.responseType = 'arraybuffer';
}
} else {
xhr.responseType = 'arraybuffer';
}
if (args.onError) {
xhr.onerror = function(evt) {
args.onError(xhr.status);
};
}
xhr.onreadystatechange = this.onStateChange.bind(this, xhrId);
xhr.onprogress = this.onProgress.bind(this, xhrId);
pendingRequest.onHeadersReceived = args.onHeadersReceived;
pendingRequest.onDone = args.onDone;
pendingRequest.onError = args.onError;
pendingRequest.onProgress = args.onProgress;
xhr.send(null);
return xhrId;
},
onProgress: function NetworkManager_onProgress(xhrId, evt) {
var pendingRequest = this.pendingRequests[xhrId];
if (!pendingRequest) {
// Maybe abortRequest was called...
return;
}
if (pendingRequest.mozChunked) {
var chunk = getArrayBuffer(pendingRequest.xhr);
pendingRequest.onProgressiveData(chunk);
}
var onProgress = pendingRequest.onProgress;
if (onProgress) {
onProgress(evt);
}
},
onStateChange: function NetworkManager_onStateChange(xhrId, evt) {
var pendingRequest = this.pendingRequests[xhrId];
if (!pendingRequest) {
@ -196,6 +223,8 @@ var NetworkManager = (function NetworkManagerClosure() {
begin: begin,
chunk: chunk
});
} else if (pendingRequest.onProgressiveData) {
pendingRequest.onDone(null);
} else {
pendingRequest.onDone({
begin: 0,
@ -215,6 +244,10 @@ var NetworkManager = (function NetworkManagerClosure() {
return this.pendingRequests[xhrId].xhr;
},
isStreamingRequest: function NetworkManager_isStreamingRequest(xhrId) {
return !!(this.pendingRequests[xhrId].onProgressiveData);
},
isPendingRequest: function NetworkManager_isPendingRequest(xhrId) {
return xhrId in this.pendingRequests;
},