mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-08 04:27:37 +00:00
88 lines
2.1 KiB
JavaScript
88 lines
2.1 KiB
JavaScript
const Cc = Components.classes;
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const Ci = Components.interfaces;
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const Cr = Components.results;
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var _CSvc;
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function get_cache_service() {
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if (_CSvc)
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return _CSvc;
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return _CSvc = Cc["@mozilla.org/network/cache-service;1"].
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getService(Ci.nsICacheService);
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}
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function get_ostream_for_entry(key, asFile, append, entryRef)
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{
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var cache = get_cache_service();
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var session = cache.createSession(
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"HTTP",
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asFile ? Ci.nsICache.STORE_ON_DISK_AS_FILE
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: Ci.nsICache.STORE_ON_DISK,
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Ci.nsICache.STREAM_BASED);
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var cacheEntry = session.openCacheEntry(
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key,
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append ? Ci.nsICache.ACCESS_READ_WRITE
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: Ci.nsICache.ACCESS_WRITE,
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true);
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var oStream = cacheEntry.openOutputStream(append ? cacheEntry.dataSize : 0);
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entryRef.value = cacheEntry;
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return oStream;
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}
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function gen_1MiB()
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{
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var i;
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var data="x";
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for (i=0 ; i < 20 ; i++)
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data+=data;
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return data;
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}
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function write_and_check(str, data, len)
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{
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var written = str.write(data, len);
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if (written != len) {
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do_throw("str.write has not written all data!\n" +
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" Expected: " + len + "\n" +
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" Actual: " + written + "\n");
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}
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}
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function write_datafile()
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{
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var entry = {};
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var oStr = get_ostream_for_entry("data", true, false, entry);
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var data = gen_1MiB();
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write_and_check(oStr, data, data.length);
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oStr.close();
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entry.value.close();
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}
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function open_for_readwrite()
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{
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var entry = {};
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var oStr = get_ostream_for_entry("data", false, true, entry);
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// Opening the entry for appending data calls nsDiskCacheStreamIO::Seek()
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// which initializes mFD. If no data is written then mBufDirty is false and
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// mFD won't be closed in nsDiskCacheStreamIO::Flush().
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oStr.close();
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entry.value.close();
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}
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function run_test() {
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do_get_profile();
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// clear the cache
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get_cache_service().evictEntries(Ci.nsICache.STORE_ANYWHERE);
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// force to write file bigger than 5MiB
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write_datafile();
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// try to open the entry for appending
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open_for_readwrite();
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}
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