我正在制作一个 Firefox 扩展程序,但无法播放位于加载项的 data
目录中的声音。
我尝试的第一件事是以这种方式在内容脚本中播放它:
var soundFile = self.options.soundFile; (new Audio(soundFile)).play();
其中
self.options.soundFile
是一个选项,它引用data
目录中的资源文件。但我遇到了安全限制:Security Error: Content at http://example.com may not load or link to resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/stackoverflow-reiew-helper/data/complete.oga.
然后我找到了一种在
main.js
脚本(此处:How to play audio in an extension?)中播放声音的方法:var data = require('sdk/self').data; exports.main = function() { var {Cc, Ci} = require("chrome"); var sound = Cc["@mozilla.org/sound;1"].createInstance(Ci.nsISound); sound.play(data.url('complete.oga')); };
此失败,但出现以下异常:
NS_ERROR_XPC_BAD_CONVERT_JS: Could not convert JavaScript argument arg 0 [nsISound.play] undefined 8 Traceback (most recent call last): File "resource://gre/modules/NetUtil.jsm", line 140, in null aCallback(pipe.inputStream, aStatusCode, aRequest); File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/net/url.js", line 49, in null resolve(data); File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 143, in resolve while (pending.length) result.then.apply(result, pending.shift()) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 37, in then return { then: function then(resolve) { resolve(value) } } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 143, in resolve while (pending.length) result.then.apply(result, pending.shift()) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 37, in then return { then: function then(resolve) { resolve(value) } } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 143, in resolve while (pending.length) result.then.apply(result, pending.shift()) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 37, in then return { then: function then(resolve) { resolve(value) } } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 143, in resolve while (pending.length) result.then.apply(result, pending.shift()) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 37, in then return { then: function then(resolve) { resolve(value) } } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 143, in resolve while (pending.length) result.then.apply(result, pending.shift()) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 37, in then return { then: function then(resolve) { resolve(value) } } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 143, in resolve while (pending.length) result.then.apply(result, pending.shift()) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 123, in then else result.then(resolved, rejected) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 37, in then return { then: function then(resolve) { resolve(value) } } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 55, in effort try { return f(options) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 143, in resolve while (pending.length) result.then.apply(result, pending.shift()) File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 37, in then return { then: function then(resolve) { resolve(value) } } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 117, in resolved function resolved(value) { deferred.resolve(resolve(value)) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/core/promise.js", line 55, in effort try { return f(options) } File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/addon/runner.js", line 90, in onLocalizationReady run(options); File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/addon-sdk/lib/sdk/addon/runner.js", line 134, in run quit: exit File "resource://jid0-a02no8rrtu2pbize7g7sszzo0z8-at-jetpack/stackoverflow-reiew-helper/lib/main.js", line 8, in exports.main sound.play(data.url('complete.oga'));
如果我将
sound.play(...)
替换为sound.beep
,我会得到不错的默认系统声音。因此,将资源路径传递给函数应该有问题。
如果有任何问题,我正在使用在线 Add-on Builder。
请提出播放扩展音频资源的解决方案。
最佳答案
nsISound.play()
采用 nsIURI
实例,而不是字符串。您必须通过 nsIIOService.newURI()
创建它第一:
var uri = Cc["@mozilla.org/network/io-service;1"]
.getService(Ci.nsIIOService)
.newURI(data.url('complete.oga'), null, null);
sound.play(uri);
不过,我不建议使用这种方法,nsISound.play()
API 是 pretty much deprecated恕我直言,无论如何都无法播放 ogg 文件。
Audio
构造函数需要访问适当的 HTML 文档。在基于 SDK 的扩展中获取一个的最简单方法是使用 page-worker
module :
require("page-worker").Page({
contentScript: "new Audio('complete.oga').play()",
contentURL: data.url("blank.html")
});
您的声音文件和 blank.html
(一个空的 HTML 文件)都需要位于扩展的 data/
目录中 - 请注意音频文件是如何通过相对 URL 加载。现在我没有看到一种方法来避免在扩展中有一个空的 HTML 文件,扩展之外的 HTML 文件无法访问扩展文件并且无法播放它们。
关于javascript - 从 firefox 扩展的数据目录播放音频,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/16449813/