Retrofit2：修改请求体中OkHttp拦截 [英] Retrofit2: Modifying request body in OkHttp Interceptor

问题描述

我在Android的应用程序中使用改造2（2.0.0-β3）与OkHttp客户，到目前为止，一切都很顺利。但目前我面临着OkHttp拦截器的问题​​。我与正在访问令牌在请求主体通信的服务器，所以当我拦截添加身份验证令牌或身份验证的身份验证方法的要求，当我需要添加更新的身份验证令牌，我需要修改的请求主体为此。但它看起来像我只能添加数据头，但不是在正在进行的请求的主体。在code到目前为止，我已经写了如下：

I am using Retrofit 2 (2.0.0-beta3) with OkHttp client in Android application and so far everything going great. But currently I am facing issue with OkHttp Interceptor. The server I am communicating with is taking access token in body of request, so when I intercept the request to add auth token or in authenticate method of Authenticator when I need to add updated auth token, I need to modify body of request for this purpose. But it looks like I can only add data in headers but not in the body of ongoing request. The code I have written so far is as follows:

client.interceptors().add(new Interceptor() {
            @Override
            public Response intercept(Chain chain) throws IOException {
                Request request = chain.request();
                if (UserPreferences.ACCESS_TOKEN != null) {
                    // need to add this access token in request body as encoded form field instead of header
                    request = request.newBuilder()
                            .header("access_token", UserPreferences.ACCESS_TOKEN))
                            .method(request.method(), request.body())
                            .build();
                }
                Response response = chain.proceed(request);
                return response;
            }
        });

任何人都可以点我朝着正确的方向如何修改请求身体补充我的访问令牌（首次或令牌刷新后更新）？任何指向正确的方向将是AP preciated。

Can anyone point me to the right direction as how to modify request body to add my access token (first time or updated after token refresh)? Any pointer to right direction would be appreciated.

推荐答案

我用这个来后参数添加到现有的。

I using this to add post parameter to the existing ones.

 OkHttpClient client = new OkHttpClient.Builder()
                    .protocols(protocols)
                    .addInterceptor(new Interceptor() {
                        @Override
                        public Response intercept(Chain chain) throws IOException {
                            Request request = chain.request();
                            Request.Builder requestBuilder = request.newBuilder();
RequestBody formBody = new FormEncodingBuilder()
            .add("email", "[e-mail]")
            .add("tel", "90301171XX")
            .build();
                            String postBodyString = Utils.bodyToString(request.body());
                            postBodyString += ((postBodyString.length() > 0) ? "&" : "") +  Utils.bodyToString(formBody);
                            request = requestBuilder
                                    .post(RequestBody.create(MediaType.parse("application/x-www-form-urlencoded;charset=UTF-8"), postBodyString))
                                    .build();
                            return chain.proceed(request);
                        }
                    })
                    .build();

public static String bodyToString(final RequestBody request){
        try {
            final RequestBody copy = request;
            final Buffer buffer = new Buffer();
            if(copy != null)
                copy.writeTo(buffer);
            else
                return "";
            return buffer.readUtf8();
        }
        catch (final IOException e) {
            return "did not work";
        }
    }

OkHttp3：

OkHttp3:

RequestBody formBody = new FormBody.Builder()
                .add("email", "[e-mail]")
                .add("tel", "90301171XX")
                .build();

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