统一日志拦截器（interceptor）

1、Retrofit2中使用自定义的日志拦截器：

@Override
public void okHttpClient(OkHttpClient.Builder okHttpClient) {
    okHttpClient.connectTimeout(5000, TimeUnit.MILLISECONDS)
            .writeTimeout(60000, TimeUnit.MILLISECONDS)
            .readTimeout(60000, TimeUnit.MILLISECONDS)
            .addInterceptor(chain -> {
                Request.Builder builder = chain.request().newBuilder();
                AccountBean bean = MainApplication.getInstance().getAccountBean();
                builder.addHeader("user_id", bean.getUserCardNum());//身份证号码

                return chain.proceed(builder.build());
            });

    okHttpClient.addInterceptor(new HttpLogReportInterceptor());//统一日志拦截器
}

2、HttpLogReportInterceptor.java 源码：

public class HttpLogReportInterceptor implements Interceptor {
    private final String TAG = this.getClass().getSimpleName();

    @Override
    public Response intercept(Chain chain) throws IOException {
        Request request = chain.request();

        StringBuilder sb = new StringBuilder();
        String url = request.url().toString();
        if (!TextUtils.isEmpty(url) && url.endsWith("api/log/save")) {
            return chain.proceed(request);
        }
        sb.append("URL: ").append(url).append("n");
        sb.append("Request: ").append(getRequestParams(request)).append("n");
        Response originalResponse;
        try {
            originalResponse = chain.proceed(request);
        } catch (Exception e) {
            sb.append("Http Error: ").append(e.getMessage());
            throw e;
        }

        ResponseBody responseBody = originalResponse.body();
        //打印响应结果
        String bodyString = "";
        if (responseBody != null && HttpContentTypeUtil.isParseable(responseBody.contentType())) {
            bodyString = getResponseContent(originalResponse);
        }
        sb.append("Response: ").append(bodyString);

        String httpInfo = sb.toString();
        LegoLog.d("统一日志拦截的内容：" + httpInfo);

        reportHttpLog(httpInfo, url);

        return originalResponse;
    }

    
    private void reportHttpLog(String httpInfo, String url) {
       Log.d(TAG,"此处调用日志上传接口");
    }

    
    private String getRequestParams(Request request) throws IOException {
        if (request.body() != null && HttpContentTypeUtil.isParseable(request.body().contentType())) {
            return parseParams(request);
        }
        return "";
    }

    
    private static String parseParams(Request request) throws UnsupportedEncodingException {
        try {
            RequestBody body = request.newBuilder().build().body();
            if (body == null) return "";
            Buffer requestBuffer = new Buffer();
            body.writeTo(requestBuffer);
            Charset charset = Charset.forName("UTF-8");
            MediaType contentType = body.contentType();

            if (contentType != null) {
                charset = contentType.charset(charset);
            }
            String text = requestBuffer.readString(charset);

            if (contentType != null && !"json".equals(contentType.subtype())) {
                text = URLDecoder.decode(text, convertCharset(charset));
            }

            return TextUtil.jsonFormat(text);
        } catch (IOException e) {
            e.printStackTrace();
            return "{"error": "" + e.getMessage() + ""}";
        }
    }
    
    private String getResponseContent(Response response) throws IOException {
        try {
            //读取服务器返回的结果
            ResponseBody responseBody = response.newBuilder().build().body();
            BufferedSource source = responseBody.source();
            source.request(Long.MAX_VALUE); // Buffer the entire body.
            Buffer buffer = source.buffer();

            //获取content的压缩类型
            String encoding = response
                    .headers()
                    .get("Content-Encoding");

            Buffer clone = buffer.clone();

            //解析response content
            return parseContent(responseBody, encoding, clone);
        } catch (IOException e) {
            LegoLog.w(e.getMessage());
            return "{"error": "" + e.getMessage() + ""}";
        }
    }

    
    private String parseContent(ResponseBody responseBody, String encoding, Buffer clone) {
        Charset charset = StandardCharsets.UTF_8;
        MediaType contentType = responseBody.contentType();
        if (contentType != null) {
            charset = contentType.charset(charset);
        }
        if (encoding != null && encoding.equalsIgnoreCase("gzip")) {//content使用gzip压缩
            return ZipUtil.decompressForGzip(clone.readByteArray(), convertCharset(charset));//解压
        } else if (encoding != null && encoding.equalsIgnoreCase("zlib")) {//content使用zlib压缩
            return ZipUtil.decompressToStringForZlib(clone.readByteArray(), convertCharset(charset));//解压
        } else {//content没有被压缩
            return clone.readString(charset);
        }
    }
    
    private static String convertCharset(Charset charset) {
	    String s = charset.toString();
	    int i = s.indexOf("[");
	    if (i == -1)
	        return s;
	    return s.substring(i + 1, s.length() - 1);
	}
}