Retrofit配置及各情况处理

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简介: Retrofit配置及各情况处理

打造终极MVP+Retrofit2+okhttp3+Rxjava2网络请求,开发实用,简约,由于篇幅字数原因  本章讲解Retrofit配置及各种处理情况

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前言

目前较火的网络请求其中有MVP+Retrofit2+okhttp3+Rxjava2,于是我也加入了使用行列,在网上找了许多案例,实际代码开发中解决了一些所谓的坑,总结了些内容与大家共享一下,有不足的地方希望大家提出我将进行再次完善。

实现目标

1、Retrofit创建

2、Retrofit实现Cookie自动化管理

3、Retrofit,Gson解析,请求返回的类型不统一,假如double返回的是null

4、请求参数日志打印

5、统一请求参数添加到请求头中

6、统一请求参数添加到请求body中

7、缓存的拦截器

8、BaseUrl动态切换

9、拦截指定接口,动态更改返回值便于测试


1、Retrofit创建
public class ApiRetrofit {
    private static final String BASE_SERVER_URL = "www.baidu.com";
    private static final int DEFAULT_TIMEOUT = 15;
    private static ApiRetrofit apiRetrofit;
    private Retrofit mRetrofit;
    private ApiServer mApiServer;
    private String TAG = "ApiRetrofit %s";
    public static ApiRetrofit getInstance() {
        if (apiRetrofit == null) {
            synchronized (Object.class) {
                if (apiRetrofit == null) {
                    apiRetrofit = new ApiRetrofit();
                }
            }
        }
        return apiRetrofit;
    }
    public ApiServer getApiService() {
        return mApiServer;
    }
    public ApiRetrofit() {
        OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        httpClientBuilder
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .retryOnConnectionFailure(true);//错误重联
        mRetrofit = new Retrofit.Builder()
                .baseUrl(BASE_SERVER_URL)
                .addConverterFactory(MyGsonConverterFactory.create())
                //支持RxJava2
                .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .client(httpClientBuilder.build())
                .build();
        mApiServer = mRetrofit.create(ApiServer.class);
    }
}
2、Retrofit实现Cookie自动化管理

点击传送查看

3、Retrofit,Gson解析,请求返回的类型不统一,假如double返回的是null

点击传送查看

4、请求参数日志打印

1.第一种办法,依赖第三方库

compile 'com.squareup.okhttp3:logging-interceptor:3.9.1'

配置信息如下

OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        HttpLoggingInterceptor logInterceptor = new HttpLoggingInterceptor();
        if(BuildConfig.DEBUG){
            //显示日志
            logInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
        }else {
            logInterceptor.setLevel(HttpLoggingInterceptor.Level.NONE);
        }
        httpClientBuilder.addInterceptor(logInterceptor);

2.第二种办法,拦截器拦截(个人推荐第二种,可控性高)

给大家推荐一个打印日志库,很漂亮的日志结构

implementation 'com.orhanobut:logger:2.2.0'
/**
     * 请求访问quest    打印日志
     * response拦截器
     */
    private Interceptor interceptor = new Interceptor() {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();
            long startTime = System.currentTimeMillis();
            Response response = chain.proceed(chain.request());
            long endTime = System.currentTimeMillis();
            long duration = endTime - startTime;
            MediaType mediaType = response.body().contentType();
            String content = response.body().string();
            Logger.wtf(TAG, "----------Request Start----------------");
            printParams(request.body());
            Logger.e(TAG, "| " + request.toString() + "===========" + request.headers().toString());
            Logger.json(content);
            Logger.e(content);
            Logger.wtf(TAG, "----------Request End:" + duration + "毫秒----------");
            return response.newBuilder()
                    .body(ResponseBody.create(mediaType, content))
                    .build();
        }
    };
    /**
     * 请求参数日志打印
     *
     * @param body
     */
    private void printParams(RequestBody body) {
        if (body != null) {
            Buffer buffer = new Buffer();
            try {
                body.writeTo(buffer);
                Charset charset = Charset.forName("UTF-8");
                MediaType contentType = body.contentType();
                if (contentType != null) {
                    charset = contentType.charset(UTF_8);
                }
                String params = buffer.readString(charset);
                Logger.e(TAG, "请求参数: | " + params);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

然后在httpClientBuilder中添加拦截

OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        httpClientBuilder
                //打印日志拦截
                .addInterceptor(interceptor)
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .retryOnConnectionFailure(true);//错误重联
5、统一请求参数添加到请求头中
/**
     * 需要头可以添加 请求头
     */
    public class HeadUrlInterceptor implements Interceptor {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request()
                    .newBuilder()
//                    .addHeader("Content-Type", "text/html; charset=UTF-8")
//                    .addHeader("Vary", "Accept-Encoding")
//                    .addHeader("Server", "Apache")
//                    .addHeader("Pragma", "no-cache")
//                    .addHeader("Cookie", "add cookies here")
//                    .addHeader("Cookie", cookie_name + "=" + cookie_value)
                    .addHeader("XX-Token", App.mToken)
                    .addHeader("XX-Device-Type", "android")
//                    .addHeader("_identity",  cookie_value)
                    .build();
            return chain.proceed(request);
        }
    }

然后在httpClientBuilder中添加拦截

OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        httpClientBuilder
                //添加参数到请求头
                .addInterceptor(new HeadUrlInterceptor())
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .retryOnConnectionFailure(true);//错误重联
6、统一请求参数添加到请求body中
/**
     * 获取HTTP 添加公共参数的拦截器
     * 暂时支持get、head请求&Post put patch的表单数据请求
     *
     * @return
     */
    public class HttpParamsInterceptor implements Interceptor {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();
            if (request.method().equalsIgnoreCase("GET") || request.method().equalsIgnoreCase("HEAD")) {
                HttpUrl httpUrl = request.url().newBuilder()
                        .addQueryParameter("version", "1.1.0")
                        .addQueryParameter("devices", "android")
                        .build();
                request = request.newBuilder().url(httpUrl).build();
            } else {
                RequestBody originalBody = request.body();
                if (originalBody instanceof FormBody) {
                    FormBody.Builder builder = new FormBody.Builder();
                    FormBody formBody = (FormBody) originalBody;
                    for (int i = 0; i < formBody.size(); i++) {
                        builder.addEncoded(formBody.encodedName(i), formBody.encodedValue(i));
                    }
                    FormBody newFormBody = builder
                            .addEncoded("version", "1.1.0")
                            .addEncoded("devices", "android")
                            .build();
                    if (request.method().equalsIgnoreCase("POST")) {
                        request = request.newBuilder().post(newFormBody).build();
                    } else if (request.method().equalsIgnoreCase("PATCH")) {
                        request = request.newBuilder().patch(newFormBody).build();
                    } else if (request.method().equalsIgnoreCase("PUT")) {
                        request = request.newBuilder().put(newFormBody).build();
                    }
                } else if (originalBody instanceof MultipartBody) {
                }
            }
            return chain.proceed(request);
        }
    }

然后在httpClientBuilder中添加拦截

OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        httpClientBuilder
                //添加参数到请求body
                .addInterceptor(new HttpParamsInterceptor())
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .retryOnConnectionFailure(true);//错误重联
7、缓存的拦截器
/**
     * 获得HTTP 缓存的拦截器
     *
     * @return
     */
    public class HttpCacheInterceptor implements Interceptor {
        @Override
        public Response intercept(Chain chain) throws IOException {
            Request request = chain.request();
            // 无网络时,始终使用本地Cache
            if (!NetWorkUtils.isConnected()) {
                request = request.newBuilder()
                        .cacheControl(CacheControl.FORCE_CACHE)
                        .build();
            }
            Response response = chain.proceed(request);
            if (NetWorkUtils.isConnected()) {
                //有网的时候读接口上的@Headers里的配置,你可以在这里进行统一的设置
                String cacheControl = request.cacheControl().toString();
                return response.newBuilder()
                        .header("Cache-Control", cacheControl)
                        .removeHeader("Pragma")
                        .build();
            } else {
                // 无网络时,设置超时为4周
                int maxStale = 60 * 60 * 24 * 28;
                return response.newBuilder()
                        //这里的设置的是我们的没有网络的缓存时间,想设置多少就是多少。
                        .header("Cache-Control", "public, only-if-cached, max-stale=" + maxStale)
                        .removeHeader("Pragma")
                        .build();
            }
        }
    }

然后在httpClientBuilder中添加拦截

OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        httpClientBuilder
                .addInterceptor(new HttpCacheInterceptor())
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .retryOnConnectionFailure(true);//错误重联
8、BaseUrl动态切换

用了一个博客中民间大神的拦截动态替换baseUrl方法有点问题,我暂时用了一种简单粗暴方法

@FormUrlEncoded
    @POST("http://www.baidu.com/api/user/edit?")
    Observable<BaseModel<Object>> getEditInfo(@FieldMap HashMap<String, String> params);

上边的路径是我随便写的,post中写全路径,这个优先级最高,同时设置了baseUrl不受影响

给大家一个专门写动态替换baseUrl连接  传送门

9、拦截指定接口,动态更改返回值便于测试

有时候我们需要返回指定值测试,可能需要空或者null等,迫于无法修改服务器返回数据,也没必要让后台修改数据,所以引发一个问题,如果拦截返回内容并修改指定字段值

public class MockInterceptor implements Interceptor{
        @Override
        public Response intercept(Chain chain) throws IOException {
            Gson gson = new Gson();
            Response response = null;
            Response.Builder responseBuilder = new Response.Builder()
                    .code(200)
                    .message("")
                    .request(chain.request())
                    .protocol(Protocol.HTTP_1_0)
                    .addHeader("content-type", "application/json");
            Request request = chain.request();
            if(request.url().toString().contains("请求的服务器地址/api/index/index?")) { //拦截指定地址
                String responseString = "{\n" +
                        "\t\"code\": 1,\n" +
                        "\t\"msg\": \"请求成功\",\n" +
                        "\t\"data\": {\n" +
                        "\t\t\"banner\": [{\n" +
                        "\t\t\t\"id\": 4,\n" +
                        "\t\t}, {\n" +
                        "\t\t\t\"id\": 5,\n" +
                        "\t\t}],\n" +
                        "\t\t\"article\": [{\n" +
                        "\t\t\t\"id\": 6,\n" +
                        "\t\t\t\"user_id\": 3,\n" +
                        "\t\t\t\"title\":null,\n" +//因为我需要个null来判断些情况是否正常,所以手动修改
                        "\t\t\t\"content\": \"测试帖子内容\",\n" +
                        "\t\t\t\"publish_time\": \"13:02:16\",\n" +
                        "\t\t\t\"view_counts\": 410,\n" +
                        "\t\t\t\"like_counts\": 1,\n" +
                        "\t\t\t\"type\": 1,\n" +
                        "\t\t\t\"cate_type\": 1,\n" +
                        "\t\t\t\"com_counts\": 1,\n" +
                        "\t\t\t\"category_name\": \"生活\",\n" +
                        "\t\t\t\"nickname\": \"测试昵称\",\n" +
                        "\t\t\t\"mobile\": \"150****5395\",\n" +
                        "\t\t}]\n" +
                        "\t}\n" +
                        "}";
                responseBuilder.body(ResponseBody.create(MediaType.parse("application/json"), responseString.getBytes()));//将数据设置到body中
                response = responseBuilder.build(); //builder模式构建response
            }else{
                response = chain.proceed(request);
            }
            return response;
        }
    }

然后在httpClientBuilder中添加拦截

OkHttpClient.Builder httpClientBuilder = new OkHttpClient.Builder();
        httpClientBuilder
                .addInterceptor(new MockInterceptor())
                .connectTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .writeTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .readTimeout(DEFAULT_TIMEOUT, TimeUnit.SECONDS)
                .retryOnConnectionFailure(true);//错误重联

文章持续更新中,祝大家开发顺利!

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