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diff --git a/files/zh-cn/mozilla/tech/xpcom/reference/interface/nsixmlhttprequest/index.html b/files/zh-cn/mozilla/tech/xpcom/reference/interface/nsixmlhttprequest/index.html deleted file mode 100644 index f12f52cb12..0000000000 --- a/files/zh-cn/mozilla/tech/xpcom/reference/interface/nsixmlhttprequest/index.html +++ /dev/null @@ -1,90 +0,0 @@ ---- -title: nsIXMLHttpRequest -slug: Mozilla/Tech/XPCOM/Reference/Interface/nsIXMLHttpRequest -tags: - - XMLHttpRequest - - XPCOM API 参考 - - XPCOM 接口参考 - - 指南 - - 接口 -translation_of: Mozilla/Tech/XPCOM/Reference/Interface/nsIXMLHttpRequest ---- -<div class="blockIndicator obsolete obsoleteHeader"><p><strong><span class="icon-only-inline" title="This is an obsolete API and is no longer guaranteed to work."><i class="icon-trash"> </i></span> Obsolete since Gecko 60 (Firefox 60 / Thunderbird 60 / SeaMonkey 2.57)</strong><br>This feature is obsolete. Although it may still work in some browsers, its use is discouraged since it could be removed at any time. Try to avoid using it.</p></div> - -<p><code>nsIXMLHttpRequest</code> along with <code><a href="/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIJSXMLHttpRequest" title="">nsIJSXMLHttpRequest</a></code> and <code><a href="/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/nsIXMLHttpRequestEventTarget" title="">nsIXMLHttpRequestEventTarget</a></code> are Mozilla's implementation details of the DOM <a href="/en/DOM/XMLHttpRequest" title="en/DOM/XMLHttpRequest">XMLHttpRequest</a> object.</p> - -<div class="note"><strong>注意:</strong> 如果你是 Web 开发者或者 Mozilla add-on 开发者，请参考 <a href="/en/DOM/XMLHttpRequest">XMLHttpRequest</a>。</div> - -<p>This page contains documentation, specific to Mozilla application and add-on developers.</p> - -<p>The interface definition: <a href="https://dxr.mozilla.org/mozilla-central/source/dom/xhr/nsIXMLHttpRequest.idl">https://dxr.mozilla.org/mozilla-central/source/dom/xhr/nsIXMLHttpRequest.idl</a></p> - -<h3 id="Elevated_Privileges">Elevated Privileges</h3> - -<p>As mentioned in the "Non-Standard Properties" the property of <code>channel</code> was read-only. When using the XPCOM interface, as seen below in <a href="#Example_code">Example 2</a>, we can get access to this. The most obvious benefit is that we can set <a href="/en-US/docs/Mozilla/Tech/XPCOM/Reference/Interface/NsIRequest#Constants">nsiRequest - Constants</a> in the <code>xhr.channel.loadFlags</code>. For instance, as done in <a href="#Example_code">Example 2</a>, the flag of <code>LOAD_ANONYMOUS</code> is added, this strips all user data (cookies, tokens, etc).</p> - -<h3 id="Using_event_handlers_from_native_code">Using event handlers from native code</h3> - -<p>(Not sure if it's up-to-date)</p> - -<p>From native code, the way to set up onload and onerror handlers is a bit different. Here is a comment from Johnny Stenback <<a class="link-mailto" href="mailto:jst@netscape.com" rel="freelink">jst@netscape.com</a>>:</p> - -<blockquote>The mozilla implementation of nsIXMLHttpRequest implements the interface nsIDOMEventTarget and that's how you're supported to add event listeners. Try something like this: nsCOMPtr<nsIDOMEventTarget> target(do_QueryInterface(myxmlhttpreq)); target->AddEventListener(NS_LITERAL_STRING("load"), mylistener, PR_FALSE) where mylistener is your event listener object that implements the interface nsIDOMEventListener. The 'onload', 'onerror', and 'onreadystatechange' attributes moved to nsIJSXMLHttpRequest, but if you're coding in C++ you should avoid using those.</blockquote> - -<p>Though actually, if you use addEventListener from C++ weird things will happen too, since the result will depend on what JS happens to be on the stack when you do it....</p> - -<p>Conclusion: Do not use event listeners on XMLHttpRequest from C++, unless you're aware of all the security implications. And then think twice about it.</p> - -<h2 id="Example_code" name="Example_code">Example code</h2> - -<p>This is a simple example code for opening a simple HTTP request from a xul application (like a Mozilla extension) without using observers:</p> - -<pre class="eval"> var req = Components.classes["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(); - req.open('POST', "<a class="external" href="http://www.foo.bar:8080/nietzsche.do" rel="freelink">http://www.foo.bar:8080/nietzsche.do</a>", true); - req.send('your=data&and=more&stuff=here'); -</pre> - -<h2 id="Example_code" name="Example_code">Example 2</h2> - -<pre><code>var {Cu: utils, Cc: classes, Ci: instances} = Components; -Cu.import('resource://gre/modules/Services.jsm'); -function xhr(url, cb) { - let xhr = Cc["@mozilla.org/xmlextras/xmlhttprequest;1"].createInstance(Ci.nsIXMLHttpRequest); - - let handler = ev => { - evf(m => xhr.removeEventListener(m, handler, !1)); - switch (ev.type) { - case 'load': - if (xhr.status == 200) { - cb(xhr.response); - break; - } - default: - Services.prompt.alert(null, 'XHR Error', 'Error Fetching Package: ' + xhr.statusText + ' [' + ev.type + ':' + xhr.status + ']'); - break; - } - }; - - let evf = f => ['load', 'error', 'abort'].forEach(f); - evf(m => xhr.addEventListener(m, handler, false)); - - xhr.mozBackgroundRequest = true; - xhr.open('GET', url, true); - xhr.channel.loadFlags |= Ci.nsIRequest.LOAD_ANONYMOUS | Ci.nsIRequest.LOAD_BYPASS_CACHE | Ci.nsIRequest.INHIBIT_PERSISTENT_CACHING; - xhr.responseType = "arraybuffer"; //dont set it, so it returns string, you dont want arraybuffer. you only want this if your url is to a zip file or some file you want to download and make a nsIArrayBufferInputStream out of it or something - xhr.send(null); -} - -xhr('https://www.gravatar.com/avatar/eb9895ade1bd6627e054429d1e18b576?s=24&d=identicon&r=PG&f=1', data => { - Services.prompt.alert(null, 'XHR Success', data); - var file = OS.Path.join(OS.Constants.Path.desktopDir, "test.png"); - var promised = OS.File.writeAtomic(file, new UInt8Array(data)); - promised.then( - function() { - alert('succesfully saved image to desktop') - }, - function(ex) { - alert('FAILED in saving image to desktop') - } - ); -});</code></pre> |