diff options
author | Alon Zakai <alonzakai@gmail.com> | 2014-03-05 10:53:36 -0800 |
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committer | Alon Zakai <alonzakai@gmail.com> | 2014-03-05 10:53:36 -0800 |
commit | e7e062844b085f838e25da3e1e5fc5d0a6959449 (patch) | |
tree | 3fb99adc07805216203e944ffc5769c9d6d845ad | |
parent | 9392717aa2c59b2714beef59a1e577edd49c4e16 (diff) | |
parent | 0ec7107c0ad295e5d105b13c09752903a5d9f6d6 (diff) |
Merge commit '0ec7107' into HEAD
-rw-r--r-- | src/library_fs.js | 137 | ||||
-rw-r--r-- | src/shell.js | 2 |
2 files changed, 69 insertions, 70 deletions
diff --git a/src/library_fs.js b/src/library_fs.js index 1428f041..3d0036ee 100644 --- a/src/library_fs.js +++ b/src/library_fs.js @@ -1436,82 +1436,81 @@ mergeInto(LibraryManager.library, { // XHR, which is not possible in browsers except in a web worker! Use preloading, // either --preload-file in emcc or FS.createPreloadedFile createLazyFile: function(parent, name, url, canRead, canWrite) { - if (typeof XMLHttpRequest !== 'undefined') { - if (!ENVIRONMENT_IS_WORKER) throw 'Cannot do synchronous binary XHRs outside webworkers in modern browsers. Use --embed-file or --preload-file in emcc'; - // Lazy chunked Uint8Array (implements get and length from Uint8Array). Actual getting is abstracted away for eventual reuse. - function LazyUint8Array() { - this.lengthKnown = false; - this.chunks = []; // Loaded chunks. Index is the chunk number - } - LazyUint8Array.prototype.get = function LazyUint8Array_get(idx) { - if (idx > this.length-1 || idx < 0) { - return undefined; - } - var chunkOffset = idx % this.chunkSize; - var chunkNum = Math.floor(idx / this.chunkSize); - return this.getter(chunkNum)[chunkOffset]; + // Lazy chunked Uint8Array (implements get and length from Uint8Array). Actual getting is abstracted away for eventual reuse. + function LazyUint8Array() { + this.lengthKnown = false; + this.chunks = []; // Loaded chunks. Index is the chunk number + } + LazyUint8Array.prototype.get = function LazyUint8Array_get(idx) { + if (idx > this.length-1 || idx < 0) { + return undefined; } - LazyUint8Array.prototype.setDataGetter = function LazyUint8Array_setDataGetter(getter) { - this.getter = getter; - } - LazyUint8Array.prototype.cacheLength = function LazyUint8Array_cacheLength() { - // Find length - var xhr = new XMLHttpRequest(); - xhr.open('HEAD', url, false); - xhr.send(null); - if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status); - var datalength = Number(xhr.getResponseHeader("Content-length")); - var header; - var hasByteServing = (header = xhr.getResponseHeader("Accept-Ranges")) && header === "bytes"; + var chunkOffset = idx % this.chunkSize; + var chunkNum = Math.floor(idx / this.chunkSize); + return this.getter(chunkNum)[chunkOffset]; + } + LazyUint8Array.prototype.setDataGetter = function LazyUint8Array_setDataGetter(getter) { + this.getter = getter; + } + LazyUint8Array.prototype.cacheLength = function LazyUint8Array_cacheLength() { + // Find length + var xhr = new XMLHttpRequest(); + xhr.open('HEAD', url, false); + xhr.send(null); + if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status); + var datalength = Number(xhr.getResponseHeader("Content-length")); + var header; + var hasByteServing = (header = xhr.getResponseHeader("Accept-Ranges")) && header === "bytes"; #if SMALL_XHR_CHUNKS - var chunkSize = 1024; // Chunk size in bytes + var chunkSize = 1024; // Chunk size in bytes #else - var chunkSize = 1024*1024; // Chunk size in bytes + var chunkSize = 1024*1024; // Chunk size in bytes #endif - if (!hasByteServing) chunkSize = datalength; - - // Function to get a range from the remote URL. - var doXHR = (function(from, to) { - if (from > to) throw new Error("invalid range (" + from + ", " + to + ") or no bytes requested!"); - if (to > datalength-1) throw new Error("only " + datalength + " bytes available! programmer error!"); - - // TODO: Use mozResponseArrayBuffer, responseStream, etc. if available. - var xhr = new XMLHttpRequest(); - xhr.open('GET', url, false); - if (datalength !== chunkSize) xhr.setRequestHeader("Range", "bytes=" + from + "-" + to); - - // Some hints to the browser that we want binary data. - if (typeof Uint8Array != 'undefined') xhr.responseType = 'arraybuffer'; - if (xhr.overrideMimeType) { - xhr.overrideMimeType('text/plain; charset=x-user-defined'); - } - - xhr.send(null); - if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status); - if (xhr.response !== undefined) { - return new Uint8Array(xhr.response || []); - } else { - return intArrayFromString(xhr.responseText || '', true); - } - }); - var lazyArray = this; - lazyArray.setDataGetter(function(chunkNum) { - var start = chunkNum * chunkSize; - var end = (chunkNum+1) * chunkSize - 1; // including this byte - end = Math.min(end, datalength-1); // if datalength-1 is selected, this is the last block - if (typeof(lazyArray.chunks[chunkNum]) === "undefined") { - lazyArray.chunks[chunkNum] = doXHR(start, end); - } - if (typeof(lazyArray.chunks[chunkNum]) === "undefined") throw new Error("doXHR failed!"); - return lazyArray.chunks[chunkNum]; - }); + if (!hasByteServing) chunkSize = datalength; - this._length = datalength; - this._chunkSize = chunkSize; - this.lengthKnown = true; - } + // Function to get a range from the remote URL. + var doXHR = (function(from, to) { + if (from > to) throw new Error("invalid range (" + from + ", " + to + ") or no bytes requested!"); + if (to > datalength-1) throw new Error("only " + datalength + " bytes available! programmer error!"); + + // TODO: Use mozResponseArrayBuffer, responseStream, etc. if available. + var xhr = new XMLHttpRequest(); + xhr.open('GET', url, false); + if (datalength !== chunkSize) xhr.setRequestHeader("Range", "bytes=" + from + "-" + to); + // Some hints to the browser that we want binary data. + if (typeof Uint8Array != 'undefined') xhr.responseType = 'arraybuffer'; + if (xhr.overrideMimeType) { + xhr.overrideMimeType('text/plain; charset=x-user-defined'); + } + + xhr.send(null); + if (!(xhr.status >= 200 && xhr.status < 300 || xhr.status === 304)) throw new Error("Couldn't load " + url + ". Status: " + xhr.status); + if (xhr.response !== undefined) { + return new Uint8Array(xhr.response || []); + } else { + return intArrayFromString(xhr.responseText || '', true); + } + }); + var lazyArray = this; + lazyArray.setDataGetter(function(chunkNum) { + var start = chunkNum * chunkSize; + var end = (chunkNum+1) * chunkSize - 1; // including this byte + end = Math.min(end, datalength-1); // if datalength-1 is selected, this is the last block + if (typeof(lazyArray.chunks[chunkNum]) === "undefined") { + lazyArray.chunks[chunkNum] = doXHR(start, end); + } + if (typeof(lazyArray.chunks[chunkNum]) === "undefined") throw new Error("doXHR failed!"); + return lazyArray.chunks[chunkNum]; + }); + + this._length = datalength; + this._chunkSize = chunkSize; + this.lengthKnown = true; + } + if (typeof XMLHttpRequest !== 'undefined') { + if (!ENVIRONMENT_IS_WORKER) throw 'Cannot do synchronous binary XHRs outside webworkers in modern browsers. Use --embed-file or --preload-file in emcc'; var lazyArray = new LazyUint8Array(); Object.defineProperty(lazyArray, "length", { get: function() { diff --git a/src/shell.js b/src/shell.js index 84844c85..65f7b923 100644 --- a/src/shell.js +++ b/src/shell.js @@ -124,7 +124,7 @@ else if (ENVIRONMENT_IS_WEB || ENVIRONMENT_IS_WORKER) { } if (ENVIRONMENT_IS_WEB) { - this['{{{ EXPORT_NAME }}}'] = Module; + window['{{{ EXPORT_NAME }}}'] = Module; } else { Module['load'] = importScripts; } |