Rest-assured 写日志到 log4j

背景：

采用Rest-assured，日志采用log4j，发现Rest-assured本身只支持打印日志到控制台，但期望打印到文件中以便排查问题

请求打印的语句只能输出到控制台

given().log().all()

（Rest-assured的官方文档：https://github.com/rest-assured/rest-assured）

解决方法：

1.翻阅资料，可以通过RestAssured.config来改变日志方面的配置，因此尝试从这里入手

RestAssured.config = RestAssured.config().logConfig(new LogConfig());

2.发现一种解决方法，PrintStream支持 字符串路径/File对象/outputstream，可以通过新建file来可以将日志输出到file中，但这种不能append，只能保存最新的一次记录，而且没有log4j格式

PrintStream ps = new PrintStream(new File("test.txt"));

RestAssured.config = config().logConfig(new LogConfig(ps));

3.继续google，发现了通过重写方法来解决该问题（http://stackoverflow.com/questions/14476112/how-to-get-rest-assured-log-into-something-printable-in-a-text-file），需要新建一个类来将logger转为outputstream

ToLoggerPrintStream loggerPrintStream = new ToLoggerPrintStream(logger);

RestAssured.config = RestAssured.config().logConfig(new LogConfig(loggerPrintStream.getPrintStream(), true));

ToLoggerPrintStream类源码：

 折叠原码

import java.io.IOException;

import java.io.OutputStream;

import java.io.PrintStream;

import java.io.UnsupportedEncodingException;

 

import org.apache.commons.io.output.ByteArrayOutputStream;

import org.apache.commons.lang.StringUtils;

import org.apache.logging.log4j.Logger;

 

/**

 * A wrapper class which takes a logger as constructor argument and offers a

 * PrintStream whose flush method writes the written content to the supplied

 * logger (debug level).

 * <p>

 * Usage:<br>

 * initializing in @BeforeClass of the unit test:

 * <p>

 * <pre>

 * ToLoggerPrintStream loggerPrintStream = new ToLoggerPrintStream(myLog);

 * RestAssured.config = RestAssured.config().logConfig(new LogConfig(loggerPrintStream.getPrintStream(), true));

 * </pre>

 * <p>

 * will redirect all log outputs of a ValidatableResponse to the supplied

 * logger:

 * <p>

 * <pre>

 * resp.then().log().all(true);

 * </pre>

 *

 * @author Heri Bender

 * @version 1.0 (28.10.2015)

 */

public class ToLoggerPrintStream {

    /**

     * Logger for this class

     */

    private Logger myLog;

    private PrintStream myPrintStream;

 

    /**

     * @return printStream

     * @throws UnsupportedEncodingException

     */

    public PrintStream getPrintStream() {

        if (myPrintStream == null) {

            OutputStream output = new OutputStream() {

 

                ByteArrayOutputStream baos = new ByteArrayOutputStream();

 

                @Override

                public void write(int b) throws IOException {

 

                    baos.write(b);

 

                }

 

                /**

                 * @see java.io.OutputStream#flush()

                 */

                @Override

                public void flush() {

 

                    String log = this.baos.toString().trim();

 

                    if (!StringUtils.isBlank(log)) {

                        myLog.info(log);

                        baos = new ByteArrayOutputStream();

                    }

                }

            };

            // true: autoflush

            // must be set!

            myPrintStream = new PrintStream(output, true);

 

        }

        return myPrintStream;

    }

 

    /**

     * Constructor

     *

     * @param logger

     */

    public ToLoggerPrintStream(Logger logger) {

        super();

        myLog = logger;

    }

}