将自定义标头添加到 WebView 资源请求 - android
我需要为来自 WebView 的每个请求添加自定义标头。我知道 loadURL
有 extraHeaders
的参数,但这些仅适用于初始请求。所有后续请求都不包含标头。我查看了 WebViewClient
中的所有覆盖,但没有任何内容允许向资源请求添加标头 - onLoadResource(WebView view, String url)
。任何帮助都会很棒。
谢谢, 射线
I need to add custom headers to EVERY request coming from the WebView. I know loadURL
has the parameter for extraHeaders
, but those are only applied to the initial request. All subsequent requests do not contain the headers. I have looked at all overrides in WebViewClient
, but nothing allows for adding headers to resource requests - onLoadResource(WebView view, String url)
. Any help would be wonderful.
Thanks,
Ray
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尝试
将标头添加到资源加载请求中,制作自定义 WebViewClient 并覆盖:
Try
For adding headers to resources loading requests, make custom WebViewClient and override:
您需要使用 拦截每个请求WebViewClient.shouldInterceptRequest
每次拦截时,您都需要获取 url,自己发出此请求,然后返回内容流:
如果您的最低 API 目标是级别 21,您可以使用新的shouldInterceptRequest 为您提供附加请求信息(例如标头)而不仅仅是 URL。
You will need to intercept each request using WebViewClient.shouldInterceptRequest
With each interception, you will need to take the url, make this request yourself, and return the content stream:
If your minimum API target is level 21, you can use the new shouldInterceptRequest which gives you additional request information (such as headers) instead of just the URL.
也许我的回复很晚了,但它涵盖了 API 低于和高于 21 级别。
要添加标头,我们应该拦截每个请求并使用所需的标头创建新的请求。
因此,我们需要重写在这两种情况下调用的 shouldInterceptRequest 方法:
1. API 至 21 级;
2. 对于 API 级别 21+
如果应处理响应类型,您可以更改
为
并添加方法
Maybe my response quite late, but it covers API below and above 21 level.
To add headers we should intercept every request and create new one with required headers.
So we need to override shouldInterceptRequest method called in both cases:
1. for API until level 21;
2. for API level 21+
If response type should be processed you could change
to
and add method
如前所述,您可以执行此操作:
我对此进行了测试,并使用 MVC 控制器进行了测试,我扩展了授权属性来检查标头,标头就在那里。
As mentioned before, you can do this:
I tested this and on with a MVC Controller that I extended the Authorize Attribute to inspect the header and the header is there.
这对我有用:
首先您需要创建方法,该方法将返回您的
您要添加到请求的标头:
其次您需要创建 WebViewClient:
将 WebViewClient 添加到您的 WebView:
希望这会有所帮助。
This works for me:
First you need to create method, which will be returns your
headers you want to add to request:
Second you need to create WebViewClient:
Add WebViewClient to your WebView:
Hope this helps.
以下是使用 HttpUrlConnection 的实现:
请注意,这不适用于 POST 请求,因为 WebResourceRequest 不提供 POST 数据。有一个 请求数据 - WebViewClient 库,它使用 JavaScript 注入解决方法来拦截 POST 数据。
Here is an implementation using HttpUrlConnection:
Note that this does not work for POST requests because WebResourceRequest doesn't provide POST data. There is a Request Data - WebViewClient library which uses a JavaScript injection workaround for intercepting POST data.
您应该能够通过跳过 loadUrl 并使用 Java 的 HttpURLConnection 编写自己的 loadPage 来控制所有标头。然后使用 webview 的 loadData 显示响应。
无法访问 Google 提供的标头。它们位于 WebView 源深处的 JNI 调用中。
You should be able to control all your headers by skipping loadUrl and writing your own loadPage using Java's HttpURLConnection. Then use the webview's loadData to display the response.
There is no access to the headers which Google provides. They are in a JNI call, deep in the WebView source.
这对我有用。像下面这样创建 WebViewClient 并将 webclient 设置为您的 webview。我必须使用 webview.loadDataWithBaseURL 因为我的网址(在我的内容中)没有基本网址,而只有相对网址。只有当使用 loadDataWithBaseURL 设置了 baseurl 时,您才能正确获取 url。
This worked for me. Create WebViewClient like this below and set the webclient to your webview. I had to use webview.loadDataWithBaseURL as my urls (in my content) did not have the baseurl but only relative urls. You will get the url correctly only when there is a baseurl set using loadDataWithBaseURL.
shouldInterceptRequest
无法拦截request.body
。我建议您在
werview.loadUrl
之前重置 userAgent。喜欢:
webview.settings.userAgentString += " key1/value1 key2/value2"
shouldInterceptRequest
could not interceptrequest.body
.I recommend you reset userAgent before
werview.loadUrl
.like:
webview.settings.userAgentString += " key1/value1 key2/value2"
您可以尝试我的解决方案来解决该问题,虽然我承认它可能并不普遍适用,但事实证明它可以有效满足我的特定要求,特别是在处理大量不触发 WebViewClient 回调的 JavaScript 获取调用时。
长话短说:
要将自定义标头添加到每个 WebView HTTP 请求中,您可以注入 java 脚本代码来覆盖您自己的 WebViewClient 中的 window.fetch 行为。
下面是详细实现
1. 创建您的自定义WebViewClient
在这个自定义WebViewClient 中,您可以传递您想要注入HTTP 标头的headerValue。
2. 定义 JS 注入代码
创建一个存储 JavaScript 注入代码的属性。此代码将修改 window.fetch 方法以包含自定义标头:
3. 重写 onPageStarted 方法
您需要重写 onPageStarted 方法以在每个导航上执行 JavaScript 注入:
注意:取决于 的实现WebView的内容,你可以选择不同的回调。
4. 最后,不要忘记为您的 WebView 设置自定义 WebViewClient。
注意:请注意,根据您的要求,在使用
webview.loadUrl(url, yourHeaders)
时,您可能仍需要手动添加其他自定义标头。最终代码:
You can try my solution for the issue, and while I acknowledge that it may not be universally applicable, it has proven effective in meeting my specific requirements, particularly when dealing with a significant number of JavaScript fetch calls that do not trigger WebViewClient callbacks.
Long story short:
To add custom headers into every WebView HTTP request, you can inject java script code that overrides window.fetch behavior in your own WebViewClient.
The following is a detailed implementation
1. Create your custom WebViewClient
In this custom WebViewClient, you can pass the headerValue that you want to inject into HTTP headers.
2. Define JS-injection code
Create a property that stores your JavaScript injection code. This code will modify the window.fetch method to include the custom header:
3. Override onPageStarted Method
You need to override the onPageStarted method to execute the JavaScript injection on each navigation:
Note: Depending on the implementation of the WebView's content, you can choose different callbacks.
4. Finally, don't forget to set your custom WebViewClient for your WebView.
Note: Please note that you may still need to manually add other custom headers when using
webview.loadUrl(url, yourHeaders)
as per your requirements.Final code:
你可以使用这个:
You can use this:
我遇到了同样的问题并解决了。
如前所述,您需要创建自定义 WebViewClient 并重写 shouldInterceptRequest 方法。
该方法应发出 webView.loadUrl,同时返回“空”WebResourceResponse。
像这样的事情:
I came accross the same problem and solved.
As said before you need to create your custom WebViewClient and override the shouldInterceptRequest method.
That method should issue a webView.loadUrl while returning an "empty" WebResourceResponse.
Something like this:
使用这个:
Use this: