如何添加自定义标头以在 webview 上发布请求 [英] how can i add a custom header to post request on webview

问题描述

我现在遇到关于 webview 上的发布请求的问题.情况如下:当我的 webview 加载登录页面时，里面有一个表单可以发出发布请求.当我单击提交按钮时，如何向它添加自定义标题.

I am now having a problem about post request on webview. Here is the situation: when my webview loaded a login page,and there's a form inside which would make the post request.How can i add a custom header to it when i click submit button.

推荐答案

我遇到了需要自己实现这样一个功能，所以我将发布一个代码片段，以供将来遇到同样问题的任何人使用.我绝对推荐使用 OkHttp，但原理(发出请求并在成功回调中将 html 加载到浏览器中)应该与任何其他网络客户端相同.

I ran into needing to implement such a feature myself so I'm posting a code snippet for anyone running into the same issue in the future. I'd definitely recommend using OkHttp but the principle (make a request and load the html into the browser in the success callback) should be the same with any other network client.

protected void postURL(final String url, String postData) {
    Request request = new Request.Builder()
            .url(url)
            .addHeader("Cache-Control", "max-age=0")
            .addHeader("Origin", "null") //Optional
            .addHeader("Upgrade-Insecure-Requests", "1")
            .addHeader("User-Agent", webView.getSettings().getUserAgentString())
            .addHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8")
            .addHeader("Accept-Language", Locale.getDefault().getLanguage())
            .addHeader("Cookie", CookieManager.getInstance().getCookie(url))
            .addHeader("X-Requested-With", BuildConfig.APPLICATION_ID)
            .post(RequestBody.create(MediaType.parse("application/x-www-form-urlencoded"), postData))
            .build();

    new OkHttpClient().newCall(request).enqueue(new Callback() {
        @Override
        public void onFailure(Call call, IOException e) {
            Timber.e(e.getMessage());
        }

        @Override
        public void onResponse(Call call, final Response response) throws IOException {
            final String htmlString = response.body().string();

            webView.post(new Runnable() {
                @Override
                public void run() {
                    webView.clearCache(true);
                    webView.loadDataWithBaseURL(url, htmlString, "text/html", "utf-8", null);
                }
            });
        }
    });
}

请注意，这些标头中的大多数不是必需的，但可以用作重建 webview 本身发出的原始请求的指导

Note that most of those headers are not required but can be used as a guideline to reconstruct an original request issued by the webview itself

这篇关于如何添加自定义标头以在 webview 上发布请求的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！