Glide加载https图片

相关文章：okhttp3.0忽略https证书

在上一节我总结的是用okhttp如何忽略证书来访问https请求，但是访问是可以访问了，但是图片却加载不出来，道理很简单，okhttp我们使用ssl来信任的所有证书，但是glide使用的自己的网络请求来加载的图片，也就是说，想要用glide访问https图片，就必须替换掉glide原始加载图片的方法，使其同样做到信任所有证书。

既然我们已经写好了okhttp信任证书（传送门），不妨就用写好的来替换掉glide的请求方式，替换很简单，只要改一下glide源代码中的几个类就可以，如下创建三个类：

1、OkHttpGlideModule.class

import com.bumptech.glide.Glide;
import com.bumptech.glide.GlideBuilder;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.module.GlideModule;

import java.io.InputStream;

import okhttp3.OkHttpClient;

public class OkHttpGlideModule implements GlideModule {
    @Override
    public void applyOptions(Context context, GlideBuilder builder) {
    }

    @Override
    public void registerComponents(Context context, Glide glide) {
        OkHttpClient mHttpClient = new OkHttpClient().newBuilder()
                .sslSocketFactory(SSLSocketClient.getSSLSocketFactory())
                .hostnameVerifier(SSLSocketClient.getHostnameVerifier())
                .build();
        glide.register(GlideUrl.class, InputStream.class, new OkHttpUrlLoader.Factory(mHttpClient));
    }
}

2、OkHttpStreamFetcher.class

import com.bumptech.glide.Priority;
import com.bumptech.glide.load.data.DataFetcher;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.util.ContentLengthInputStream;

import java.io.IOException;
import java.io.InputStream;
import java.util.Map;

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;

public class OkHttpStreamFetcher implements DataFetcher<InputStream> {
    private final OkHttpClient client;
    private final GlideUrl url;
    private InputStream stream;
    private ResponseBody responseBody;

    public OkHttpStreamFetcher(OkHttpClient client, GlideUrl url) {
        this.client = client;
        this.url = url;
    }

    @Override
    public InputStream loadData(Priority priority) throws Exception {
        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();

        Response response = client.newCall(request).execute();
        responseBody = response.body();
        if (!response.isSuccessful()) {
            throw new IOException("Request failed with code: " + response.code());
        }

        long contentLength = responseBody.contentLength();
        stream = ContentLengthInputStream.obtain(responseBody.byteStream(), contentLength);
        return stream;
    }

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

    @Override
    public String getId() {
        return url.getCacheKey();
    }

    @Override
    public void cancel() {
    }
}

3、OkHttpUrlLoader.class

import android.content.Context;

import com.bumptech.glide.load.data.DataFetcher;
import com.bumptech.glide.load.model.GenericLoaderFactory;
import com.bumptech.glide.load.model.GlideUrl;
import com.bumptech.glide.load.model.ModelLoader;
import com.bumptech.glide.load.model.ModelLoaderFactory;

import java.io.InputStream;

import okhttp3.OkHttpClient;

public class OkHttpUrlLoader implements ModelLoader<GlideUrl, InputStream> {

    public static class Factory implements ModelLoaderFactory<GlideUrl, InputStream> {
        private static volatile OkHttpClient internalClient;
        private OkHttpClient client;

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

        public Factory() {
            this(getInternalClient());
        }

        public Factory(OkHttpClient client) {
            this.client = client;
        }

        @Override
        public ModelLoader<GlideUrl, InputStream> build(Context context, GenericLoaderFactory factories) {
            return new OkHttpUrlLoader(client);
        }

        @Override
        public void teardown() {
        }
    }

    private final OkHttpClient client;

    public OkHttpUrlLoader(OkHttpClient client) {
        this.client = client;
    }

    @Override
    public DataFetcher<InputStream> getResourceFetcher(GlideUrl model, int width, int height) {
        return new OkHttpStreamFetcher(client, model);
    }
}

4、配置使用GlideModule

在AndroidManifest中application标签下声明使用GlideMoudle

注意：在OkHttpGlideModule中可以看到我们重新构建了一个okhttp并注册到了glide中：

SSLSocketClient类在上一篇文章中有说明（传送门），我们通过GlideMoudle这个类来修改了glide原始的网络请求，使用okhttp忽略的https证书。

上述的三个类，有兴趣的可以问度娘，glide的功能强大到我只能望而却步了！