我有一个webview活动,该活动在其onCreate()方法中加载带有一些自定义请求标头的URL。要求是将自定义标头与初始URL请求一起传递。在某些设备上,Webview活动已启动几次后,Webview会停止发送标头。
例如,我有一个HomeActivity,它可以启动WebViewActivity。启动WebViewActivity并导航回HomeActivity几次后,WebViewActivity停止发送自定义请求标头,除非我清除应用程序的数据,否则此行为不会改变。
我已使用MITM工具确认了此行为。实现如下:
@Override
protected void onCreate(Bundle savedInstanceState) {
Map<String, String> map = new HashMap<>();
map.put("header1", "header1_value");
map.put("header2", "header2_value");
map.put("header3", "header3_value");
map.put("header4", "header4_value");
webView.loadUrl("https://www.example.com/mypath", map);
}
以上代码段在每次启动活动时无条件执行。但是,标头不存在于Webview发出的实际请求中。另外,请求的页面是303重定向。
答案 0 :(得分:0)
如果您的最低API目标是21级,则可以使用shouldInterceptRequest,否则可以使用this
每次拦截时,您都需要获取url,自己进行此请求,然后返回内容流:
然后:
WebViewClient wvc = new WebViewClient() {
@Override
public WebResourceResponse shouldInterceptRequest(WebView view, String url) {
try {
DefaultHttpClient client = new DefaultHttpClient();
HttpGet httpGet = new HttpGet(url);
httpGet.setHeader("header1", "header1_value");
httpGet.setHeader("header2", "header2_value");
httpGet.setHeader("header3", "header3_value");
httpGet.setHeader("header4", "header4_value");
HttpResponse httpReponse = client.execute(httpGet);
Header contentType = httpReponse.getEntity().getContentType();
Header encoding = httpReponse.getEntity().getContentEncoding();
InputStream responseInputStream = httpReponse.getEntity().getContent();
String contentTypeValue = null;
String encodingValue = null;
if (contentType != null) {
contentTypeValue = contentType.getValue();
}
if (encoding != null) {
encodingValue = encoding.getValue();
}
return new WebResourceResponse(contentTypeValue, encodingValue, responseInputStream);
} catch (ClientProtocolException e) {
//return null to tell WebView we failed to fetch it WebView should try again.
return null;
} catch (IOException e) {
//return null to tell WebView we failed to fetch it WebView should try again.
return null;
}
}
}
//Where wv is your webview
wv.setWebViewClient(wvc);
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