Hbuilder MUI里面使用java.net.URL发送网络请求,操作cookie

2022-01-27 09:13:32

1. 引入所需网络请求类：

            var URL = plus.android.importClass("java.net.URL");

            var URLConnection = plus.android.importClass("java.net.URLConnection");

            var BufferedReader = plus.android.importClass("java.io.BufferedReader");

            var InputStreamReader = plus.android.importClass("java.io.InputStreamReader");

            var StrictMode = plus.android.importClass("android.os.StrictMode");

2. 忽略Android3.0开始强制程序不能在主线程中访问网络的强制策略

            //以下两句必加，不然会请求不了网络，原因：

            //android3.0版本开始就强制程序不能在主线程中访问网络，要把访问网络放在独立的线程中。

            //以下两句可以忽略这些强制策略。

            var policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();

            StrictMode.setThreadPolicy(policy);

3. 使用URL进行网络请求

            var httpConn = new URL("https://login.10086.cn/captchazh.htm?type=05&timestamp=" + nowtime).openConnection();

            // 设置通用属性

            httpConn.setRequestProperty("Accept", "*/*");

            httpConn.setRequestProperty("Content-Type", "image/jpeg");

            httpConn.setRequestProperty("Connection", "Keep-Alive");

            //设置Cookie

            //httpConn.setRequestProperty("Cookie", cookies);

            httpConn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");

            // 建立实际的连接

            httpConn.connect();

4. 获取请求头和Set-Cookie以及返回的数据：

            // 响应头部获取

            var htmlHeads = [];

            var cookies = "";

            //取cookie

            for (var i = 1; i <; i++) {

                var key_ = httpConn.getHeaderFieldKey(i);

                if (key_ == null){

                    console.log("--------------------------------"+cookies);

                    break;

                }else{

                    htmlHeads.push(key_ + ':' +httpConn.getHeaderField(i));

                    if(key_ == "Set-Cookie") {

                        var cookie = httpConn.getHeaderField(i);

                        cookies += cookie.substring(0, cookie.indexOf(";")+1);

                    }

                }

            }

            //----------------获取输出 start----------------//

            var reader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), "UTF-8"));

            var lines;

            //输出数据

            var response = "";

            while ((lines = reader.readLine()) != null)  {

                response += lines;

            }

            reader.close();

            //----------------获取输出 end----------------//

完整例子：

        function gocook() {

            var nowtime = (new Date).getTime();

            var URL = plus.android.importClass("java.net.URL");

            var URLConnection = plus.android.importClass("java.net.URLConnection");

            var BufferedReader = plus.android.importClass("java.io.BufferedReader");

            var InputStreamReader = plus.android.importClass("java.io.InputStreamReader");

            var StrictMode = plus.android.importClass("android.os.StrictMode");

            //以下两句必加，不然会请求不了网络，原因：

            //android3.0版本开始就强制程序不能在主线程中访问网络，要把访问网络放在独立的线程中。

            //以下两句可以忽略这些强制策略。

            var policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();

            StrictMode.setThreadPolicy(policy);

            var httpConn = new URL("https://login.10086.cn/captchazh.htm?type=05&timestamp=" + nowtime).openConnection();

            // 设置通用属性

            httpConn.setRequestProperty("Accept", "*/*");

            httpConn.setRequestProperty("Content-Type", "image/jpeg");

            httpConn.setRequestProperty("Connection", "Keep-Alive");

            //设置Cookie

            //httpConn.setRequestProperty("Cookie", cookies);

            httpConn.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1)");

            // 建立实际的连接

            httpConn.connect();

            // 响应头部获取

            var htmlHeads = [];

            var cookies = "";

            //取cookie

            for (var i = 1; i <; i++) {

                var key_ = httpConn.getHeaderFieldKey(i);

                if (key_ == null){

                    console.log("--------------------------------"+cookies);

                    break;

                }else{

                    htmlHeads.push(key_ + ':' +httpConn.getHeaderField(i));

                    if(key_ == "Set-Cookie") {

                        var cookie = httpConn.getHeaderField(i);

                        cookies += cookie.substring(0, cookie.indexOf(";")+1);

                    }

                }

            }

            //----------------获取输出 start----------------//

            var reader = new BufferedReader(new InputStreamReader(httpConn.getInputStream(), "UTF-8"));

            var lines;

            //输出数据

            var response = "";

            while ((lines = reader.readLine()) != null)  {

                response += lines;

            }

            reader.close();

            //----------------获取输出 end----------------//

        }

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