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我试图在 Firefox 中编写一个简单的扩展,其中我修改了 X-Frame-Allow
header 。
我简要地查看了文档,发现它们支持 webRequest.onHeadersReceived.addListener()
。但是,我无法在收到 header 时运行我的代码。
list .json
{
"manifest_version": 2,
"name": "xframeoptions",
"version": "1.0",
"description": "Set X-Frame-Options to ALLOW",
"icons": {
"48": "icons/icon.png"
},
"permissions": [
"webRequest",
"webRequestBlocking",
"<all_urls>"
],
"content_scripts": [
{
"matches": ["<all_urls>"],
"js": ["xframeoptions.js"]
}
]
}
xframeoptions.js
function rewriteHeader(e) {
console.log(e.responseHeaders);
for (var header of e.responseHeaders) {
console.log(header.name + ":" + header.value);
if (header.name == "X-Frame-Options") {
header.value = 'ALLOW';
modified = true;
break;
}
}
return {responseHeaders: e.responseHeaders};
}
console.log("Initializing xframeoptions extension ...test");
browser.webRequest.onHeadersReceived.addListener(
rewriteHeader,
{urls: ['<all_urls>']},
["blocking", "responseHeaders"]
);
如何通过 Firefox 的 WebExtensions 修改响应 header ?
最佳答案
您正试图从 content script 执行此操作.您需要从 background script 执行此操作.内容脚本可以访问一小部分 WebExtensions API。可用的 API 包括(来自 MDN Content Scripts page ):
From
extension
:From
runtime
:From
i18n
:Everything from
storage
.
这不包括您尝试使用的 API(例如 webRequest
)。
background
页面您应该将 manifest.json 更改为xframeoptions.js 的content_scripts
键,将其作为background
脚本使用类似:
"background": {
"scripts": [
"xframeoptions.js"
]
},
如果您需要在内容脚本中调用 API 的信息,则需要使用 message passing to communicate between the content script and your background script .但是,通常您可以将完整的逻辑移动到在后台上下文中运行的脚本(后台脚本、弹出脚本、选项页面脚本等)。具体需要什么将取决于您希望通过脚本完成什么。
在后台上下文中可用的所有特权 API 与访问内容脚本中可用的网页内容(对特权 API 的访问非常有限)之间的这种功能分离,以及它们之间的异步消息传递,是 extensions are architected 的基础。 .您将需要围绕此架构设计您的扩展程序。
此问题可能导致许多可能的错误。以下是可能错误的不完整列表:
TypeError: browser.alarms is undefined
TypeError: browser.bookmarks is undefined
TypeError: browser.browserAction is undefined
TypeError: browser.browsingData is undefined
TypeError: browser.commands is undefined
TypeError: browser.contextMenus is undefined
TypeError: browser.contextualIdentities is undefined
TypeError: browser.cookies is undefined
TypeError: browser.devtools.inspectedWindow is undefined
TypeError: browser.downloads is undefined
TypeError: browser.events is undefined
TypeError: browser.extension.getBackgroundPage is undefined
TypeError: browser.extension.getExtensionTabs is undefined
TypeError: browser.extension.getViews is undefined
TypeError: browser.extension.isAllowedFileSchemeAccess is undefined
TypeError: browser.extension.isAllowedIncognitoAccess is undefined
TypeError: browser.extension.lastError is undefined
TypeError: browser.extension.onRequest is undefined
TypeError: browser.extension.onRequestExternal is undefined
TypeError: browser.extension.sendRequest is undefined
TypeError: browser.extension.setUpdateUrlData is undefined
TypeError: browser.extension.ViewType is undefined
TypeError: browser.extensionTypes is undefined
TypeError: browser.history is undefined
TypeError: browser.i18n.LanguageCode is undefined
TypeError: browser.identity is undefined
TypeError: browser.idle is undefined
TypeError: browser.management is undefined
TypeError: browser.notifications is undefined
TypeError: browser.omnibox is undefined
TypeError: browser.pageAction is undefined
TypeError: browser.privacy is undefined
TypeError: browser.runtime.connectNative is undefined
TypeError: browser.runtime.getBackgroundPage is undefined
TypeError: browser.runtime.getBrowserInfo is undefined
TypeError: browser.runtime.getPackageDirectoryEntry is undefined
TypeError: browser.runtime.getPlatformInfo is undefined
TypeError: browser.runtime.id is undefined
TypeError: browser.runtime.lastError is undefined
TypeError: browser.runtime.MessageSender is undefined
TypeError: browser.runtime.onBrowserUpdateAvailable is undefined
TypeError: browser.runtime.onConnectExternal is undefined
TypeError: browser.runtime.onInstalled is undefined
TypeError: browser.runtime.OnInstalledReason is undefined
TypeError: browser.runtime.onMessageExternal is undefined
TypeError: browser.runtime.onRestartRequired is undefined
TypeError: browser.runtime.OnRestartRequiredReason is undefined
TypeError: browser.runtime.onStartup is undefined
TypeError: browser.runtime.onSuspend is undefined
TypeError: browser.runtime.onSuspendCanceled is undefined
TypeError: browser.runtime.onUpdateAvailable is undefined
TypeError: browser.runtime.openOptionsPage is undefined
TypeError: browser.runtime.PlatformArch is undefined
TypeError: browser.runtime.PlatformInfo is undefined
TypeError: browser.runtime.PlatformNaclArch is undefined
TypeError: browser.runtime.PlatformOs is undefined
TypeError: browser.runtime.Port is undefined
TypeError: browser.runtime.reload is undefined
TypeError: browser.runtime.requestUpdateCheck is undefined
TypeError: browser.runtime.RequestUpdateCheckStatus is undefined
TypeError: browser.runtime.sendNativeMessage is undefined
TypeError: browser.runtime.setUninstallURL is undefined
TypeError: browser.sessions is undefined
TypeError: browser.sidebarAction is undefined
TypeError: browser.tabs is undefined
TypeError: browser.thing is undefined
TypeError: browser.topSites is undefined
TypeError: browser.webNavigation is undefined
TypeError: browser.webRequest is undefined
TypeError: browser.windows is undefined
TypeError: chrome.alarms is undefined
TypeError: chrome.bookmarks is undefined
TypeError: chrome.browserAction is undefined
TypeError: chrome.browsingData is undefined
TypeError: chrome.commands is undefined
TypeError: chrome.contextMenus is undefined
TypeError: chrome.contextualIdentities is undefined
TypeError: chrome.cookies is undefined
TypeError: chrome.devtools.inspectedWindow is undefined
TypeError: chrome.downloads is undefined
TypeError: chrome.events is undefined
TypeError: chrome.extension.getBackgroundPage is undefined
TypeError: chrome.extension.getExtensionTabs is undefined
TypeError: chrome.extension.getViews is undefined
TypeError: chrome.extension.isAllowedFileSchemeAccess is undefined
TypeError: chrome.extension.isAllowedIncognitoAccess is undefined
TypeError: chrome.extension.lastError is undefined
TypeError: chrome.extension.onRequest is undefined
TypeError: chrome.extension.onRequestExternal is undefined
TypeError: chrome.extension.sendRequest is undefined
TypeError: chrome.extension.setUpdateUrlData is undefined
TypeError: chrome.extension.ViewType is undefined
TypeError: chrome.extensionTypes is undefined
TypeError: chrome.history is undefined
TypeError: chrome.i18n.LanguageCode is undefined
TypeError: chrome.identity is undefined
TypeError: chrome.idle is undefined
TypeError: chrome.management is undefined
TypeError: chrome.notifications is undefined
TypeError: chrome.omnibox is undefined
TypeError: chrome.pageAction is undefined
TypeError: chrome.privacy is undefined
TypeError: chrome.runtime.connectNative is undefined
TypeError: chrome.runtime.getBackgroundPage is undefined
TypeError: chrome.runtime.getBrowserInfo is undefined
TypeError: chrome.runtime.getPackageDirectoryEntry is undefined
TypeError: chrome.runtime.getPlatformInfo is undefined
TypeError: chrome.runtime.id is undefined
TypeError: chrome.runtime.lastError is undefined
TypeError: chrome.runtime.MessageSender is undefined
TypeError: chrome.runtime.onBrowserUpdateAvailable is undefined
TypeError: chrome.runtime.onConnectExternal is undefined
TypeError: chrome.runtime.onInstalled is undefined
TypeError: chrome.runtime.OnInstalledReason is undefined
TypeError: chrome.runtime.onMessageExternal is undefined
TypeError: chrome.runtime.onRestartRequired is undefined
TypeError: chrome.runtime.OnRestartRequiredReason is undefined
TypeError: chrome.runtime.onStartup is undefined
TypeError: chrome.runtime.onSuspend is undefined
TypeError: chrome.runtime.onSuspendCanceled is undefined
TypeError: chrome.runtime.onUpdateAvailable is undefined
TypeError: chrome.runtime.openOptionsPage is undefined
TypeError: chrome.runtime.PlatformArch is undefined
TypeError: chrome.runtime.PlatformInfo is undefined
TypeError: chrome.runtime.PlatformNaclArch is undefined
TypeError: chrome.runtime.PlatformOs is undefined
TypeError: chrome.runtime.Port is undefined
TypeError: chrome.runtime.reload is undefined
TypeError: chrome.runtime.requestUpdateCheck is undefined
TypeError: chrome.runtime.RequestUpdateCheckStatus is undefined
TypeError: chrome.runtime.sendNativeMessage is undefined
TypeError: chrome.runtime.setUninstallURL is undefined
TypeError: chrome.sessions is undefined
TypeError: chrome.sidebarAction is undefined
TypeError: chrome.tabs is undefined
TypeError: chrome.thing is undefined
TypeError: chrome.topSites is undefined
TypeError: chrome.webNavigation is undefined
TypeError: chrome.webRequest is undefined
TypeError: chrome.windows is undefined
关于javascript - 类型错误 : [API] is undefined in content script or Why can't I do this in a content script?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/40996014/
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