Class JsCallJava

agentweb-core/src/main/java/com/just/agentweb/JsCallJava.java:30–262

import java.util.HashMap;

public class JsCallJava {
    private final static String TAG = "JsCallJava";
    private final static String RETURN_RESULT_FORMAT = "{\"CODE\": %d, \"result\": %s}";
    private static final String MSG_PROMPT_HEADER = "AgentWeb:";
    private static final String KEY_OBJ = "obj";
    private static final String KEY_METHOD = "method";
    private static final String KEY_TYPES = "types";
    private static final String KEY_ARGS = "args";
    private static final String[] IGNORE_UNSAFE_METHODS = {"getClass", "hashCode", "notify", "notifyAll", "equals", "toString", "wait"};
    private HashMap<String, Method> mMethodsMap;
    private Object mInterfaceObj;
    private String mInterfacedName;
    private String mPreloadInterfaceJs;

    public JsCallJava(Object interfaceObj, String interfaceName) {
        try {
            if (TextUtils.isEmpty(interfaceName)) {
                throw new Exception("injected name can not be null");
            }
            mInterfaceObj = interfaceObj;
            mInterfacedName = interfaceName;
            mMethodsMap = new HashMap<String, Method>();
            // getMethods会获得所有继承与非继承的方法
            Method[] methods = mInterfaceObj.getClass().getMethods();
            // 拼接的js脚本可参照备份文件：./library/doc/injected.js
            StringBuilder sb = new StringBuilder("javascript:(function(b){console.log(\"");
            sb.append(mInterfacedName);
            sb.append(" init begin\");var a={queue:[],callback:function(){var d=Array.prototype.slice.call(arguments,0);var c=d.shift();var e=d.shift();this.queue[c].apply(this,d);if(!e){delete this.queue[c]}}};");
            for (Method method : methods) {
                Log.i("Info","method:"+method);
                String sign;
                if ((sign = genJavaMethodSign(method)) == null) {
                    continue;
                }
                mMethodsMap.put(sign, method);
                sb.append(String.format("a.%s=", method.getName()));
            }
            sb.append("function(){var f=Array.prototype.slice.call(arguments,0);if(f.length<1){throw\"");
            sb.append(mInterfacedName);
            sb.append(" call result, message:miss method name\"}var e=[];for(var h=1;h<f.length;h++){var c=f[h];var j=typeof c;e[e.length]=j;if(j==\"function\"){var d=a.queue.length;a.queue[d]=c;f[h]=d}}var k = new Date().getTime();var l = f.shift();var m=prompt('");
            sb.append(MSG_PROMPT_HEADER);
            sb.append("'+JSON.stringify(");
            sb.append(promptMsgFormat("'" + mInterfacedName + "'", "l", "e", "f"));
            sb.append("));console.log(\"invoke \"+l+\", time: \"+(new Date().getTime()-k));var g=JSON.parse(m);if(g.CODE!=200){throw\"");
            sb.append(mInterfacedName);
            sb.append(" call result, CODE:\"+g.CODE+\", message:\"+g.result}return g.result};Object.getOwnPropertyNames(a).forEach(function(d){var c=a[d];if(typeof c===\"function\"&&d!==\"callback\"){a[d]=function(){return c.apply(a,[d].concat(Array.prototype.slice.call(arguments,0)))}}});b.");
            sb.append(mInterfacedName);
            sb.append("=a;console.log(\"");
            sb.append(mInterfacedName);
            sb.append(" init end\")})(window)");
            mPreloadInterfaceJs = sb.toString();
            sb.setLength(0);
        } catch (Exception e) {
            if (LogUtils.isDebug()) {
                Log.e(TAG, "init js result:" + e.getMessage());
            }
        }
    }