[英]Send authorization header with every request in webview using okhttp in android
我正在使用 WebView 來顯示網頁,但服務器需要一個來自我的 webview 的請求的授權令牌。 有誰知道這是否可能? 我在 #SO added -header-to-all-request-with- retrofit -2 中提到了這篇文章。 但我無法得到結果。
這是我的代碼(沒有我的編碼標准,我是初學者)
public class TableViewTest extends AppCompatActivity {
ScrollView scrollView;
WebView webView;
SharedPreferences pref;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_table_view_test);
//final ProgressDialog pd = ProgressDialog.show(this, "", "Loading...", true);
webView = (WebView) findViewById(R.id.webView1Id)
webView.setVerticalScrollBarEnabled(true);
webView.setHorizontalScrollBarEnabled(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.setWebViewClient(new WebViewClient() {
@SuppressWarnings("deprecation")
@Override
public boolean shouldOverrideUrlLoading(WebView view, String url) {
//return true load with system-default-browser or other browsers, false with your webView
pref = getSharedPreferences("app", Context.MODE_PRIVATE);
final String acToken = pref.getString("token", "DEFAULT");
HashMap<String, String> headerMap = new HashMap<>();
//put all headers in this header map
headerMap.put("Authorization", acToken);
view.loadUrl(url, headerMap);
return false;
}
@Override
public void onLoadResource(WebView view, String url) {
super.onLoadResource(view, url);
}
@Override
public void onPageStarted(WebView view, String url, Bitmap favicon) {
super.onPageStarted(view, url, favicon);
}
});
webView.loadUrl("myurl");
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
webView.saveState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
webView.restoreState(savedInstanceState);
}
public WebViewClient getWebViewClientWithCustomHeader(){
pref = getSharedPreferences("app", Context.MODE_PRIVATE);
final String acToken = pref.getString("token", "DEFAULT");
return new WebViewClient() {
@SuppressWarnings("deprecation")
public WebResourceResponse shouldInterceptRequest(WebView view, String url){
try {
OkHttpClient okHttpClient = new OkHttpClient();
Request request = new Request.Builder().url(url).addHeader("Authorization" , "Bearer " + acToken)
.build();
Response response = okHttpClient.newCall(request).execute();
return new WebResourceResponse(response.header("content-type", response.body().contentType().type()), // You can set something other as default content-type
response.header("content-encoding", "utf-8"), // Again, you can set another encoding as default
response.body().byteStream());
} catch (ClientProtocolException e) {
//return null to tell WebView we failed to fetch it WebView should try again.
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
};
}
}
任何幫助表示贊賞
編輯
現在我能夠獲得服務器響應,但是在純 html 中,沒有正確呈現 css,不知道為什么。
這是新代碼,
public class TableViewTest extends AppCompatActivity {
ScrollView scrollView;
WebView webView;
SharedPreferences pref;
@SuppressLint("SetJavaScriptEnabled")
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_table_view_test);
//final ProgressDialog pd = ProgressDialog.show(this, "", "Loading...", true);
String url = "myurl";
pref = getSharedPreferences("app", Context.MODE_PRIVATE);
webView = (WebView) findViewById(R.id.webView1Id);
webView.setVerticalScrollBarEnabled(true);
webView.setHorizontalScrollBarEnabled(true);
webView.getSettings().setJavaScriptEnabled(true);
webView.getSettings().setBuiltInZoomControls(true);
webView.setWebViewClient(wvc);
webView.loadUrl("myurl");
}
@Override
protected void onSaveInstanceState(Bundle outState) {
super.onSaveInstanceState(outState);
webView.saveState(outState);
}
@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
super.onRestoreInstanceState(savedInstanceState);
webView.restoreState(savedInstanceState);
}
public WebViewClient wvc = new WebViewClient() {
@SuppressWarnings("deprecation")
public WebResourceResponse shouldInterceptRequest(WebView view, String url){
try {
final String acToken = pref.getString("token", "DEFAULT");
OkHttpClient okHttpClient = new OkHttpClient();
Request request = new Request.Builder().url(url).addHeader("Authorization" , "Bearer " + acToken)
.build();
Response response = okHttpClient.newCall(request).execute();
return new WebResourceResponse(response.header("content-type", response.body().contentType().type()), // You can set something other as default content-type
response.header("content-encoding", "utf-8"), // Again, you can set another encoding as default
response.body().byteStream());
} catch (ClientProtocolException e) {
//return null to tell WebView we failed to fetch it WebView should try again.
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
};
}
並在堆棧跟蹤中找到了這個,在堆棧跟蹤中僅此而已
E/DataReductionProxySettingListener: No DRP key due to exception:java.lang.ClassNotFoundException: com.android.webview.chromium.Drp
最后,這將糾正 html 渲染問題(對不起,我之前沒有注意到這一點)。
更改content-type
return new WebResourceResponse(response.header("content-type", response.body().contentType().type()), // You can set something other as default content-type
response.header("content-encoding", "utf-8"), // Again, you can set another encoding as default
response.body().byteStream());
到text/html
,所以新代碼是
return new WebResourceResponse(response.header("text/html", response.body().contentType().type()), // You can set something other as default content-type
response.header("content-encoding", "utf-8"), // Again, you can set another encoding as default
response.body().byteStream());
如果我的解決方案需要任何修改,請隨時進行編輯。 始終接受更好的解決方案。 快樂編碼......謝謝大家#SO准備提供幫助。
Sudheesh 的回答很棒,這里是更新版本,因為shouldOverrideUrlLoading(WebView view, String url)
在 API 21 中已被棄用:
webView.setWebViewClient(new WebViewClient() {
public WebResourceResponse shouldInterceptRequest(WebView view, WebResourceRequest webResourceRequest) {
// Filter out any requests we not interested in
if (webResourceRequest.getUrl().getHost() == null ||
!webResourceRequest.getUrl().getHost().equals(MyAPI.getServer().toHost())) {
return super.shouldInterceptRequest(view, webResourceRequest);
}
try {
OkHttpClient okHttpClient = new OkHttpClient();
Request request = new Request.Builder().url(webResourceRequest.getUrl().toString())
.addHeader(HttpConnector.DefaultConnector().getAuthorizationHeaderKey(), HttpConnector.DefaultConnector().getAuthorizationHeaderValue())
.build();
Response response = okHttpClient.newCall(request).execute();
return new WebResourceResponse(response.header("text/html", response.body().contentType().type()), // You can set something other as default content-type
response.header("content-encoding", "utf-8"), // Again, you can set another encoding as default
response.body().byteStream());
} catch (ClientProtocolException e) {
//return null to tell WebView we failed to fetch it WebView should try again.
return null;
} catch (IOException e) {
e.printStackTrace();
return null;
}
}
});
這可能無法回答您的問題,但我認為這對遇到類似問題的其他人會有所幫助。
如果服務器資源需要像這樣的基本身份驗證標頭Authorization: Basic dXNlcm5hbWU6cGFzc3dvcmQ=
那么你應該像這樣覆蓋 WebViewClient 中的onReceivedHttpAuthRequest
方法。
webView.webViewClient = object : WebViewClient() {
override fun onReceivedHttpAuthRequest(view: WebView?, handler: HttpAuthHandler?, host: String?, realm: String?) {
handler?.proceed("username", "password")
}
}
另請注意,如果可能,您應該始終避免攔截 WebView 請求。 在此處閱讀更多相關信息。
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