如何在 Glide 监听器中获取 http responseCode？

Question

我正在使用 Glide 来显示位于远程服务器上的图像的预览。需要以不同的方式处理不同的响应代码。例如，当服务器响应代码 202 时，我必须等待特定的套接字事件。这是我的代码：

fun ImageView.loadRounded(glideUrl: GlideUrl, radius: Int = 20) {
    GlideApp.with(this.context)
            .load(glideUrl)
            .apply(RequestOptions.diskCacheStrategyOf(DiskCacheStrategy.ALL))
            .apply(RequestOptions.bitmapTransform(RoundedCorners(radius)))
            .listener(object : RequestListener<Drawable> {
                override fun onLoadFailed(e: GlideException?, model: Any?, target: Target<Drawable>?, isFirstResource: Boolean): Boolean {
                    e?.rootCauses?.forEach {
                        logd("${it.message}")
                    }
                    return false
                }
                override fun onResourceReady(resource: Drawable?, model: Any?, target: Target<Drawable>?, dataSource: DataSource?, isFirstResource: Boolean): Boolean {
                    return false
                }
            })
            .into(this)
}

在服务器发送响应代码 202 的情况下，在 onLoadFailed 中我得到以下输出：

java.io.IOException(java.lang.RuntimeException: setDataSource failed: status = 0x80000000)

发生这种情况是因为 202 是成功状态代码之一。 Glide 尝试下载图片，但是没有。

方法e?.logRootCauses()也不给出响应代码。

有没有办法在 Glide 侦听器中获取 http 响应代码？

Answer 1

找到了一种截取状态码并用另一个替换它的方法。为此，我用修改后的版本替换了 Glide 中使用的 DataFetcher 实现。以下是步骤：

如果您还没有 @GlideModule，请创建它：

@GlideModule
public class MyGlideModule extends AppGlideModule {
    @Override
    public void registerComponents(@NonNull Context context, @NonNull Glide glide, @NonNull Registry registry) {
        registry.append(GlideUrl.class, InputStream.class,
            new MyOkHttpUrlLoader.Factory(new OkHttpClient()));
    }
}

其中标准 OkHttpUrlLoader 也被替换为修改版本。不幸的是，您不能只扩展标准实现，因为您必须与它的私有成员进行交互。所以它应该是原始 OkHttpUrlLoader 的完整副本，但是 return 在 buildLoadData 方法中自定义 DataFetcher。另外 build 方法应该 return 加载器修改版本的实例：

import androidx.annotation.NonNull;

import com.bumptech.glide.load.Options;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.load.model.ModelLoader;
import com.bumptech.glide.load.model.ModelLoaderFactory;
import com.bumptech.glide.load.model.MultiModelLoaderFactory;

import java.io.InputStream;

import okhttp3.Call;
import okhttp3.OkHttpClient;

/**
 * A simple model loader for fetching media over http/https using OkHttp.
 */
public class MyOkHttpUrlLoader implements ModelLoader<GlideUrl, InputStream> {

    private final Call.Factory client;

    // Public API.
    @SuppressWarnings("WeakerAccess")
    public MyOkHttpUrlLoader(@NonNull Call.Factory client) {
        this.client = client;
    }

    @Override
    public boolean handles(@NonNull GlideUrl url) {
        return true;
    }

    @Override
    public LoadData<InputStream> buildLoadData(@NonNull GlideUrl model, int width, int height,
                                               @NonNull Options options) {
        return new LoadData<>(model, new MyOkHttpStreamFetcher(client, model));
    }

    /**
     * The default factory for {@link com.bumptech.glide.integration.okhttp3.OkHttpUrlLoader}s.
     */
    // Public API.
    @SuppressWarnings("WeakerAccess")
    public static class Factory implements ModelLoaderFactory<GlideUrl, InputStream> {
        private static volatile Call.Factory internalClient;
        private final Call.Factory client;

        /**
         * Constructor for a new Factory that runs requests using a static singleton client.
         */
        public Factory() {
            this(getInternalClient());
        }

        /**
         * Constructor for a new Factory that runs requests using given client.
         *
         * @param client this is typically an instance of {@code OkHttpClient}.
         */
        public Factory(@NonNull Call.Factory client) {
            this.client = client;
        }

        private static Call.Factory getInternalClient() {
            if (internalClient == null) {
                synchronized (Factory.class) {
                    if (internalClient == null) {
                        internalClient = new OkHttpClient();
                    }
                }
            }
            return internalClient;
        }

        @NonNull
        @Override
        public ModelLoader<GlideUrl, InputStream> build(MultiModelLoaderFactory multiFactory) {
            return new MyOkHttpUrlLoader(client);
        }

        @Override
        public void teardown() {
            // Do nothing, this instance doesn't own the client.
        }
    }
 }

这是我修改后的 DataFetcher 版本，它几乎是标准实现 (OkHttpStreamFetcher) 的副本。不同之处在于，在 onResponse 方法中，我检查代码，如果是 202，我将其替换为错误代码 418:

import android.util.Log;

import androidx.annotation.NonNull;

import com.bumptech.glide.Priority;
import com.bumptech.glide.load.DataSource;
import com.bumptech.glide.load.HttpException;
import com.bumptech.glide.load.data.DataFetcher;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.util.ContentLengthInputStream;
import com.bumptech.glide.util.Preconditions;
import com.zultys.mobiledroid.utils.logger.Logger;

import java.io.IOException;
import java.io.InputStream;
import java.util.Map;
import okhttp3.Call;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;

/**
 * Fetches an {@link InputStream} using the okhttp library.
 */
public class MyOkHttpStreamFetcher implements DataFetcher<InputStream>, okhttp3.Callback {
    private static final String TAG = "OkHttpFetcher";
    private final Call.Factory client;
    private final GlideUrl url;
    private InputStream stream;
    private ResponseBody responseBody;
    private DataCallback<? super InputStream> callback;
    // call may be accessed on the main thread while the object is in use on other threads. All other
    // accesses to variables may occur on different threads, but only one at a time.
    private volatile Call call;

    // Public API.
    @SuppressWarnings("WeakerAccess")
    public ZultysOkHttpStreamFetcher(Call.Factory client, GlideUrl url) {
        this.client = client;
        this.url = url;
    }

    @Override
    public void loadData(@NonNull Priority priority,
                         @NonNull final DataCallback<? super InputStream> callback) {
        Request.Builder requestBuilder = new Request.Builder().url(url.toStringUrl());
        for (Map.Entry<String, String> headerEntry : url.getHeaders().entrySet()) {
            String key = headerEntry.getKey();
            requestBuilder.addHeader(key, headerEntry.getValue());
        }
        Request request = requestBuilder.build();
        this.callback = callback;

        call = client.newCall(request);
        call.enqueue(this);
    }

    @Override
    public void onFailure(@NonNull Call call, @NonNull IOException e) {
        if (Log.isLoggable(TAG, Log.DEBUG)) {
            Log.d(TAG, "OkHttp failed to obtain result", e);
        }
        callback.onLoadFailed(e);
    }

    @Override
    public void onResponse(@NonNull Call call, @NonNull Response response) {
        responseBody = response.body();
        // Code 202 means that file was sent from another MX in MX net,
        // and you have to wait until it gets copied to your MX. After that you will receive
        // csta packet with messageStatus IMS_FILE_DOWNLOAD, and can repeat same request.
        if (response.code() == 202) {
            callback.onLoadFailed(new HttpException("I'm a teapot", 418));
        } else if (response.isSuccessful()) {
            long contentLength = Preconditions.checkNotNull(responseBody).contentLength();
            stream = ContentLengthInputStream.obtain(responseBody.byteStream(), contentLength);
            callback.onDataReady(stream);
        } else {
            callback.onLoadFailed(new HttpException(response.message(), response.code()));
        }
    }

    @Override
    public void cleanup() {
        try {
            if (stream != null) {
                stream.close();
            }
        } catch (IOException e) {
            // Ignored
        }
        if (responseBody != null) {
            responseBody.close();
        }
        callback = null;
    }

    @Override
    public void cancel() {
        Call local = call;
        if (local != null) {
            local.cancel();
        }
    }

    @NonNull
    @Override
    public Class<InputStream> getDataClass() {
        return InputStream.class;
    }

    @NonNull
    @Override
    public DataSource getDataSource() {
        return DataSource.REMOTE;
    }
 }

如何在 Glide 监听器中获取 http responseCode？

How to get http responseCode in Glide listener?

android

http

listener

android-glide

http-response-codes