{"id":371,"date":"2023-02-25T08:29:51","date_gmt":"2023-02-25T00:29:51","guid":{"rendered":"https:\/\/www.appblog.cn\/?p=371"},"modified":"2023-04-30T14:40:54","modified_gmt":"2023-04-30T06:40:54","slug":"okhttp3-learning-7-file-download-interceptor-method","status":"publish","type":"post","link":"https:\/\/www.appblog.cn\/index.php\/2023\/02\/25\/okhttp3-learning-7-file-download-interceptor-method\/","title":{"rendered":"OKHttp3\u5b66\u4e60\u4e4b\u4e03\uff1a\u6587\u4ef6\u4e0b\u8f7d\uff08\u62e6\u622a\u5668\u65b9\u5f0f\uff09"},"content":{"rendered":"

OKHttp3 \u62e6\u622a\u5668\u7b80\u4ecb<\/h2>\n

Wiki\uff1ahttps:\/\/github.com\/square\/okhttp\/wiki\/Interceptors<\/a><\/p>\n

\u62e6\u622a\u5668\u662f\u4e00\u79cd\u5f3a\u5927\u7684\u673a\u5236\uff0c\u53ef\u4ee5\u76d1\u89c6\u3001\u91cd\u5199\u548c\u91cd\u8bd5\u8c03\u7528\u3002<\/p>\n

<\/p>\n

\u4e0b\u9762\u662f\u5b98\u65b9\u4e00\u4e2a\u7b80\u5355\u4f8b\u5b50\uff0c\u62e6\u622a\u53d1\u51fa\u7684\u8bf7\u6c42\u548c\u4f20\u5165\u7684\u54cd\u5e94\u7684\u65e5\u5fd7\u3002<\/p>\n

class LoggingInterceptor implements Interceptor {\n    @Override\n    public Response intercept(Interceptor.Chain chain) throws IOException {\n        Request request = chain.request();\n\n        long t1 = System.nanoTime();\n        logger.info(String.format("Sending request %s on %s%n%s", request.url(), chain.connection(), request.headers()));\n\n        Response response = chain.proceed(request);\n\n        long t2 = System.nanoTime();\n        logger.info(String.format("Received response for %s in %.1fms%n%s", response.request().url(), (t2 - t1) \/ 1e6d, response.headers()));\n\n        return response;\n    }\n}<\/code><\/pre>\n
\u8c03\u7528 chain.proceed(request) \u662f\u6bcf\u4e2a\u62e6\u622a\u5668\u7684\u5173\u952e\u90e8\u5206\u7684\u5b9e\u73b0\u3002\u8fd9\u4e2a\u7b80\u5355\u7684\u65b9\u6cd5\u5b58\u5728\u6240\u6709HTTP\u5de5\u4f5c\u53d1\u751f\u7684\u5730\u65b9\uff0c\u751f\u4ea7\u6ee1\u8db3\u8bf7\u6c42\u7684\u54cd\u5e94\u3002<\/p>\n
\u62e6\u622a\u5668\u53ef\u4ee5\u591a\u4e2a\u94fe\u63a5\uff0c\u5047\u8bbe\u60a8\u6709\u4e00\u4e2a\u538b\u7f29\u62e6\u622a\u5668\u548c\u6821\u9a8c\u62e6\u622a\u5668\uff1a\u4f60\u9700\u8981\u51b3\u5b9a\u6570\u636e\u662f\u5148\u538b\u7f29\u7136\u540e\u6821\u9a8c\uff0c\u8fd8\u662f\u5148\u6821\u9a8c\u540e\u538b\u7f29\u3002OkHttp\u4f7f\u7528\u5217\u8868\u8ffd\u8e2a\u62e6\u622a\u5668\uff0c\u62e6\u622a\u5668\u6309\u987a\u5e8f\u88ab\u8c03\u7528\u3002<\/p>\n
\"image\"<\/p>\n
\u5e94\u7528\u62e6\u622a\u5668<\/h3>\n
    \n
  • \u8c03\u7528\u65b9\u5f0f\uff1abuilder.addInterceptor() <\/li>\n
  • \u4e0d\u9700\u8981\u62c5\u5fc3\u4e2d\u95f4\u8fc7\u7a0b\u7684\u54cd\u5e94\uff0c\u5982\u91cd\u5b9a\u5411\u548c\u91cd\u8bd5\u3002<\/li>\n
  • \u603b\u662f\u53ea\u8c03\u7528\u4e00\u6b21\uff0c\u5373\u4f7fHTTP\u54cd\u5e94\u662f\u4ece\u7f13\u5b58\u4e2d\u83b7\u53d6\u3002<\/li>\n
  • \u89c2\u5bdf\u5e94\u7528\u7a0b\u5e8f\u7684\u521d\u8877\uff0c\u4e0d\u5173\u5fc3OkHttp\u6ce8\u5165\u7684\u5934\u4fe1\u606f\u5982: If-None-Match\u3002<\/li>\n
  • \u5141\u8bb8\u77ed\u8def\u800c\u4e0d\u8c03\u7528 Chain.proceed()\uff0c\u5373\u4e2d\u6b62\u8c03\u7528.<\/li>\n
  • \u5141\u8bb8\u91cd\u8bd5\uff0c\u4f7f Chain.proceed()\u8c03\u7528\u591a\u6b21\u3002<\/li>\n<\/ul>\n
    \u7f51\u7edc\u62e6\u622a\u5668<\/h3>\n
      \n
    • \u8c03\u7528\u65b9\u5f0f\uff1abuilder.addNetworkInterceptor()<\/li>\n
    • \u80fd\u591f\u64cd\u4f5c\u4e2d\u95f4\u8fc7\u7a0b\u7684\u54cd\u5e94\uff0c\u5982\u91cd\u5b9a\u5411\u548c\u91cd\u8bd5\u3002<\/li>\n
    • \u5f53\u7f51\u7edc\u77ed\u8def\u800c\u8fd4\u56de\u7f13\u5b58\u54cd\u5e94\u65f6\u4e0d\u88ab\u8c03\u7528\u3002<\/li>\n
    • \u53ea\u89c2\u5bdf\u5728\u7f51\u7edc\u4e0a\u4f20\u8f93\u7684\u6570\u636e\u3002<\/li>\n
    • \u643a\u5e26\u8bf7\u6c42\u6765\u8bbf\u95ee\u8fde\u63a5\u3002<\/li>\n<\/ul>\n
      \u91cd\u5199\u8bf7\u6c42<\/h3>\n
      \u62e6\u622a\u5668\u53ef\u4ee5\u6dfb\u52a0\u3001\u5220\u9664\u6216\u66ff\u6362\u8bf7\u6c42\u5934\u4fe1\u606f\u3002\u4ed6\u4eec\u8fd8\u53ef\u4ee5\u6539\u53d8\u7684\u8bf7\u6c42\u643a\u5e26\u7684\u5b9e\u4f53\u3002\u4f8b\u5982\uff0c \u5982\u679c\u4f60\u8fde\u63a5\u5230\u4e00\u4e2a\u652f\u6301\u538b\u7f29\u7684\u7f51\u7edc\u670d\u52a1\u5668\u4f60\u53ef\u4ee5\u4f7f\u7528\u4e00\u4e2a\u5e94\u7528\u62e6\u622a\u5668\u6765\u6dfb\u52a0\u8bf7\u6c42\u5b9e\u4f53\u538b\u7f29\u3002\u672c\u6587\u5373\u901a\u8fc7\u91cd\u5199\u8bf7\u6c42\u8fdb\u884c\u6587\u4ef6\u4e0a\u4f20\u62e6\u622a\uff0c\u5b9e\u73b0\u8fdb\u5ea6\u8ba1\u7b97\u3002<\/p>\n
      \u91cd\u5199\u54cd\u5e94<\/h3>\n
      \u4e0e\u91cd\u5199\u8bf7\u6c42\u5bf9\u79f0\uff0c\u62e6\u622a\u5668\u53ef\u4ee5\u91cd\u5199\u54cd\u5e94\u5934\u4fe1\u606f\u548c\u6539\u53d8\u54cd\u5e94\u5b9e\u4f53\u3002\u672c\u6587\u5373\u901a\u8fc7\u91cd\u5199\u54cd\u5e94\u8fdb\u884c\u6587\u4ef6\u4e0b\u8f7d\u62e6\u622a\uff0c\u5b9e\u73b0\u6587\u4ef6\u5199\u5165\u548c\u8fdb\u5ea6\u8ba1\u7b97\u3002<\/p>\n
      \u5b9e\u73b0\u4ee3\u7801<\/h2>\n
      \u8fdb\u5ea6\u56de\u8c03\u63a5\u53e3<\/h3>\n
      public interface ProgressListener {\n    void onProgress(int progress);\n    void onDone(long totalSize);\n}<\/code><\/pre>\n
      \u5305\u88c5\u54cd\u5e94\u4f53\uff0c\u5904\u7406\u8fdb\u5ea6<\/h3>\n
      public class ProgressResponseBody extends ResponseBody {\n\n    \/\/\u5b9e\u9645\u7684\u5f85\u5305\u88c5\u54cd\u5e94\u4f53\n    private ResponseBody responseBody;\n    \/\/\u8fdb\u5ea6\u56de\u8c03\u63a5\u53e3\n    private ProgressListener progressListener;\n    \/\/\u5305\u88c5\u5b8c\u6210\u7684BufferedSource\n    private BufferedSource bufferedSource;\n\n    public ProgressResponseBody(ResponseBody responseBody, ProgressListener listener) {\n        this.responseBody = responseBody;\n        this.progressListener = listener;\n    }\n\n    @Override\n    public MediaType contentType() {\n        return responseBody.contentType();\n    }\n\n    @Override\n    public long contentLength() {\n        return responseBody.contentLength();\n    }\n\n    @Override\n    public BufferedSource source() {\n        if (bufferedSource == null)\n            bufferedSource = Okio.buffer(getSource(responseBody.source()));\n        return bufferedSource;\n    }\n\n    private Source getSource(Source source) {\n        return new ForwardingSource(source) {\n            long contentLength = contentLength();\n            long readLength = 0;\n\n            @Override\n            public long read(Buffer sink, long byteCount) throws IOException {\n                long len = super.read(sink, byteCount);\n                \/\/Log.i("yezhou", "ProgressResponseBody: len=" + len + ", byteCount=" + byteCount);\n                if (len != -1) {\n                    readLength += len;\n                    int progress = (int) (readLength * 1.0f \/ contentLength * 100);\n                    progressListener.onProgress(progress);\n                } else {\n                    progressListener.onDone(contentLength);\n                }\n                return len;\n            }\n        };\n    }\n}<\/code><\/pre>\n
      \u5305\u88c5\u54cd\u5e94\u4f53\uff0c\u5199\u5165\u6587\u4ef6<\/h3>\n
      public class WriteFileResponseBody extends ResponseBody {\n\n    private ResponseBody responseBody;\n    private BufferedSource bufferedSource;\n    private FileOutputStream fos;\n    private String filePath;\n\n    public WriteFileResponseBody(ResponseBody responseBody, String filePath) {\n        this.responseBody = responseBody;\n        this.filePath = filePath;\n        try {\n            fos = new FileOutputStream(filePath);\n        } catch (FileNotFoundException e) {\n            e.printStackTrace();\n        }\n    }\n\n    @Override\n    public MediaType contentType() {\n        return responseBody.contentType();\n    }\n\n    @Override\n    public long contentLength() {\n        return responseBody.contentLength();\n    }\n\n    @Override\n    public BufferedSource source() {\n        if (bufferedSource == null)\n            bufferedSource = Okio.buffer(getSource(responseBody.source()));\n        return bufferedSource;\n    }\n\n    private Source getSource(Source source) {\n        return new ForwardingSource(source) {\n            @Override\n            public long read(Buffer sink, long byteCount) throws IOException {\n                long len = super.read(sink, byteCount);\n                \/\/Log.i("yezhou", "WriteFileResponseBody: len=" + len + ", byteCount=" + byteCount);\n                if (len != -1) {\n                    sink.copyTo(fos, 0, len);\n                } else {\n                    fos.close();\n                }\n                return len;\n            }\n        };\n    }\n}<\/code><\/pre>\n
      \u5c01\u88c5\u7f51\u7edc\u62e6\u622a\u5668\uff0c\u5b9e\u73b0\u6587\u4ef6\u4e0b\u8f7d<\/h3>\n
      public void downloadFileWithInterceptors(View view) {\n    final String filePath = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator + fileName;\n    OkHttpClient client = new OkHttpClient.Builder().addNetworkInterceptor(new Interceptor() {\n        @Override\n        public Response intercept(Chain chain) throws IOException {\n            Response response = chain.proceed(chain.request());\n            return response.newBuilder()\n                    .body(new WriteFileResponseBody(response.body(), filePath))  \/\/\u5c01\u88c5\u6587\u4ef6\u5199\u5165\u62e6\u622a\u5668\n                    .build();\n        }\n    }).addNetworkInterceptor(new Interceptor() {\n        @Override\n        public Response intercept(Chain chain) throws IOException {\n            \/\/\u62e6\u622a\n            Response response = chain.proceed(chain.request());\n            \/\/\u5305\u88c5\u54cd\u5e94\u4f53\u5e76\u8fd4\u56de\n            return response.newBuilder()\n                    .body(new ProgressResponseBody(response.body(), new MyProgressListener()))  \/\/\u5c01\u88c5\u4e0b\u8f7d\u8fdb\u5ea6\u62e6\u622a\u5668\n                    .build();\n        }\n    }).build();\n\n    Request request = new Request.Builder().url(fileUrl).build();\n\n    client.newCall(request).enqueue(new Callback() {\n        @Override\n        public void onFailure(Call call, IOException e) {\n            Log.i(TAG, "\u8bf7\u6c42\u5931\u8d25: " + e.getLocalizedMessage());\n        }\n\n        @Override\n        public void onResponse(Call call, Response response) throws IOException {\n            if (response.isSuccessful()) {\n                Log.i(TAG, "\u8bf7\u6c42\u6210\u529f");\n                InputStream is = response.body().byteStream();\n                try {\n                    byte[] buffer = new byte[1024];\n                    while (is.read(buffer) != -1) {\n\n                    }\n                } catch (IOException e) {\n                    e.printStackTrace();\n                } finally {\n                    if (is != null) {\n                        try {\n                            is.close();\n                        } catch (IOException e) {\n                            e.printStackTrace();\n                        }\n                    }\n                }\n            }\n        }\n    });\n}\n\nclass MyProgressListener implements ProgressListener {\n    @Override\n    public void onProgress(final int progress) {\n        runOnUiThread(new Runnable() {\n            @Override\n            public void run() {\n                mProgressBar.setProgress(progress);\n            }\n        });\n    }\n\n    @Override\n    public void onDone(long totalSize) {\n        runOnUiThread(new Runnable() {\n            @Override\n            public void run() {\n                Toast.makeText(MainActivity.this, "\u4e0b\u8f7d\u5b8c\u6210", Toast.LENGTH_SHORT).show();\n            }\n        });\n    }\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
      OKHttp3 \u62e6\u622a\u5668\u7b80\u4ecb Wiki\uff1ahttps:\/\/github.com\/square\/okhttp\/wik […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[116],"tags":[],"class_list":["post-371","post","type-post","status-publish","format-standard","hentry","category-okhttp"],"_links":{"self":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/371","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/comments?post=371"}],"version-history":[{"count":0,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/posts\/371\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/media?parent=371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/categories?post=371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.appblog.cn\/index.php\/wp-json\/wp\/v2\/tags?post=371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}