内容表

• Type
• 浏览器兼容性

webRequest.BlockingResponse

An object of this type is returned by event listeners that have set "blocking" in their extraInfoSpec 自变量。

By setting particular properties in BlockingResponse , the listener can modify network requests.

Note that you can't set all this object's properties in every listener: the properties you can set are dependent on the event that triggered this listener, as detailed below.

类型

Values of this type are objects. They contain the following properties:

authCredentials 可选

对象 . If set, the request is made using the given credentials. You can only set this property in  onAuthRequired 。 authCredentials property is an object with the following properties:

username

string . Username to supply.

password

string . Password to supply.

cancel 可选

boolean 。若 true , the request is cancelled. You can only set this property in onBeforeRequest , onBeforeSendHeaders , onHeadersReceived ，和 onAuthRequired .

redirectUrl 可选

string . This is a URL, and if set, the original request is redirected to that URL. You can only set this property in onBeforeRequest or onHeadersReceived .

Redirections to non-HTTP schemes such as data: are allowed, but they are not currently supported ( bug 707624 ). Redirects use the same request method as the original request unless initiated from onHeadersReceived stage, in which case the redirect uses the GET method.

If an extension wants to redirect a public (e.g. HTTPS) URL to an extension page , the extension's manifest.json file must contain a web_accessible_resources key that lists the URL for the extension page..

requestHeaders 可选

webRequest.HttpHeaders . This is an HttpHeaders object, an array in which each object represents a header. If set, the request is made with these headers rather than the original headers. You can only set this property in  onBeforeSendHeaders .

responseHeaders 可选

webRequest.HttpHeaders . This is an HttpHeaders object, an array in which each object represents a header. If set, the server is assumed to have responded with these response headers instead of the originals. You can only set this property in  onHeadersReceived . If multiple extensions attempt to set the same header (for example, Content-Security-Policy ), only one of the changes will be successful.

upgradeToSecure 可选

boolean 。若设为 true and the original request is an HTTP request, this will prevent the original request from being sent and instead make a secure (HTTPS) request. If any extension returns redirectUrl in onBeforeRequest ，那么 upgradeToSecure will be ignored for that request. You can only set this property in onBeforeRequest .

浏览器兼容性

BCD tables only load in the browser

注意： This API is based on Chromium's chrome.webRequest API. This documentation is derived from web_request.json in the Chromium code.

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最后修改： Oct 26, 2021 , 由 MDN 贡献者

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