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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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47
web/compatibility.js
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@ -167,6 +167,21 @@ if (typeof PDFJS === 'undefined') {
// The worker will be using XHR, so we can save time and disable worker.
PDFJS.disableWorker = true;
Object.defineProperty(xhrPrototype, 'responseType', {
get: function xmlHttpRequestGetResponseType() {
return this._responseType || 'text';
},
set: function xmlHttpRequestSetResponseType(value) {
if (value === 'text' || value === 'arraybuffer') {
this._responseType = value;
if (value === 'arraybuffer' &&
typeof this.overrideMimeType === 'function') {
this.overrideMimeType('text/plain; charset=x-user-defined');
}
}
}
});
// Support: IE9
if (typeof VBArray !== 'undefined') {
Object.defineProperty(xhrPrototype, 'response', {
@ -181,25 +196,20 @@ if (typeof PDFJS === 'undefined') {
return;
}
// other browsers
function responseTypeSetter() {
// will be only called to set "arraybuffer"
this.overrideMimeType('text/plain; charset=x-user-defined');
}
if (typeof xhr.overrideMimeType === 'function') {
Object.defineProperty(xhrPrototype, 'responseType',
{ set: responseTypeSetter });
}
function responseGetter() {
var text = this.responseText;
var i, n = text.length;
var result = new Uint8Array(n);
for (i = 0; i < n; ++i) {
result[i] = text.charCodeAt(i) & 0xFF;
Object.defineProperty(xhrPrototype, 'response', {
get: function xmlHttpRequestResponseGet() {
if (this.responseType !== 'arraybuffer') {
return this.responseText;
}
var text = this.responseText;
var i, n = text.length;
var result = new Uint8Array(n);
for (i = 0; i < n; ++i) {
result[i] = text.charCodeAt(i) & 0xFF;
}
return result.buffer;
}
return result.buffer;
}
Object.defineProperty(xhrPrototype, 'response', { get: responseGetter });
});
})();
// window.btoa (base64 encode function) ?
@ -471,6 +481,7 @@ if (typeof PDFJS === 'undefined') {
if (isSafari || isOldAndroid) {
PDFJS.disableRange = true;
PDFJS.disableStream = true;
}
})();