Java IoUtils.readAndCloseStream方法代码示例

import com.nostra13.universalimageloader.utils.IoUtils; //导入方法依赖的package包/类
/**
 * Retrieves {@link InputStream} of image by URI (image is located in the network).
 *
 * @param imageUri Image URI
 * @param extra    Auxiliary object which was passed to {@link DisplayImageOptions.Builder#extraForDownloader(Object)
 *                 DisplayImageOptions.extraForDownloader(Object)}; can be null
 * @return {@link InputStream} of image
 * @throws IOException if some I/O error occurs during network request or if no InputStream could be created for
 *                     URL.
 */
protected InputStream getStreamFromNetwork(String imageUri, Object extra) throws IOException {
	HttpURLConnection conn = createConnection(imageUri, extra);

	int redirectCount = 0;
	while (conn.getResponseCode() / 100 == 3 && redirectCount < MAX_REDIRECT_COUNT) {
		conn = createConnection(conn.getHeaderField("Location"), extra);
		redirectCount++;
	}

	InputStream imageStream;
	try {
		imageStream = conn.getInputStream();
	} catch (IOException e) {
		// Read all data to allow reuse connection (http://bit.ly/1ad35PY)
		IoUtils.readAndCloseStream(conn.getErrorStream());
		throw e;
	}
	if (!shouldBeProcessed(conn)) {
		IoUtils.closeSilently(imageStream);
		throw new IOException("Image request failed with response code " + conn.getResponseCode());
	}

	return new ContentLengthInputStream(new BufferedInputStream(imageStream, BUFFER_SIZE), conn.getContentLength());
}
 

import com.nostra13.universalimageloader.utils.IoUtils; //导入方法依赖的package包/类
protected InputStream getStreamFromNetwork(String imageUri, Object extra) throws IOException {
    HttpURLConnection conn = createConnection(imageUri, extra);
    int redirectCount = 0;
    while (conn.getResponseCode() / 100 == 3 && redirectCount < 5) {
        conn = createConnection(conn.getHeaderField("Location"), extra);
        redirectCount++;
    }
    try {
        InputStream imageStream = conn.getInputStream();
        if (shouldBeProcessed(conn)) {
            return new ContentLengthInputStream(new BufferedInputStream(imageStream, 32768),
                    conn.getContentLength());
        }
        IoUtils.closeSilently(imageStream);
        throw new IOException("Image request failed with response code " + conn
                .getResponseCode());
    } catch (IOException e) {
        IoUtils.readAndCloseStream(conn.getErrorStream());
        throw e;
    }
}
 

import com.nostra13.universalimageloader.utils.IoUtils; //导入方法依赖的package包/类
/**
 * Retrieves {@link InputStream} of image by URI (image is located in the network).
 *
 * @param imageUri Image URI
 * @param extra    Auxiliary object which was passed to {@link DisplayImageOptions.Builder#extraForDownloader(Object)
 *                 DisplayImageOptions.extraForDownloader(Object)}; can be null
 * @return {@link InputStream} of image
 * @throws IOException if some I/O error occurs during network request or if no InputStream could be created for
 *                     URL.
 */
protected InputStream getStreamFromNetwork(String imageUri, Object extra) throws IOException {
	HttpURLConnection conn = createConnection(imageUri, extra);

	int redirectCount = 0;
	while (conn.getResponseCode() / 100 == 3 && redirectCount < MAX_REDIRECT_COUNT) {
		conn = createConnection(conn.getHeaderField("Location"), extra);
		redirectCount++;
	}

	InputStream imageStream;
	try {
		imageStream = conn.getInputStream();
	} catch (IOException e) {
		// Read all data to allow reuse connection (http://bit.ly/1ad35PY)
		IoUtils.readAndCloseStream(conn.getErrorStream());
		throw e;
	}
	return new ContentLengthInputStream(new BufferedInputStream(imageStream, BUFFER_SIZE), conn.getContentLength());
}
 

import com.nostra13.universalimageloader.utils.IoUtils; //导入方法依赖的package包/类
/**
 * Retrieves {@link java.io.InputStream} of image by URI (image is located in the network).
 *
 * @param imageUri Image URI
 * @param extra    Auxiliary object which was passed to {@link com.nostra13.universalimageloader.core.DisplayImageOptions.Builder#extraForDownloader(Object)
 *                 DisplayImageOptions.extraForDownloader(Object)}; can be null
 * @return {@link java.io.InputStream} of image
 * @throws java.io.IOException if some I/O error occurs during network request or if no InputStream could be created for
 *                     URL.
 */
protected InputStream getStreamFromNetwork(String imageUri, Object extra) throws IOException {
	HttpURLConnection conn = createConnection(imageUri, extra);

	int redirectCount = 0;
	while (conn.getResponseCode() / 100 == 3 && redirectCount < MAX_REDIRECT_COUNT) {
		conn = createConnection(conn.getHeaderField("Location"), extra);
		redirectCount++;
	}

	InputStream imageStream;
	try {
		imageStream = conn.getInputStream();
	} catch (IOException e) {
		// Read all data to allow reuse connection (http://bit.ly/1ad35PY)
		IoUtils.readAndCloseStream(conn.getErrorStream());
		throw e;
	}
	return new ContentLengthInputStream(new BufferedInputStream(imageStream, BUFFER_SIZE), conn.getContentLength());
}
 

import com.nostra13.universalimageloader.utils.IoUtils; //导入方法依赖的package包/类
protected InputStream getStreamFromNetwork(String s, Object obj)
{
    HttpURLConnection httpurlconnection = createConnection(s, obj);
    for (int i = 0; httpurlconnection.getResponseCode() / 100 == 3 && i < 5; i++)
    {
        httpurlconnection = createConnection(httpurlconnection.getHeaderField("Location"), obj);
    }

    InputStream inputstream;
    try
    {
        inputstream = httpurlconnection.getInputStream();
    }
    catch (IOException ioexception)
    {
        IoUtils.readAndCloseStream(httpurlconnection.getErrorStream());
        throw ioexception;
    }
    return new ContentLengthInputStream(new BufferedInputStream(inputstream, 32768), httpurlconnection.getContentLength());
}
 

import com.nostra13.universalimageloader.utils.IoUtils; //导入方法依赖的package包/类
/**
    * 通过图片的网络地址来获取图片流--当前图片通过网络获取
 * Retrieves {@link InputStream} of image by URI (image is located in the network).
 *
 * @param imageUri Image URI
 * @param extra    Auxiliary object which was passed to {@link DisplayImageOptions.Builder#extraForDownloader(Object)
 *                 DisplayImageOptions.extraForDownloader(Object)}; can be null
 * @return {@link InputStream} of image
 * @throws IOException if some I/O error occurs during network request or if no InputStream could be created for
 *                     URL.
 */
protected InputStream getStreamFromNetwork(String imageUri, Object extra) throws IOException {
	//创建网络连接
       HttpURLConnection conn = createConnection(imageUri, extra);
       //对于重定向进行判断判断，重定向的次数最大5次循环获取
	int redirectCount = 0;
	while (conn.getResponseCode() / 100 == 3 && redirectCount < MAX_REDIRECT_COUNT) {
		conn = createConnection(conn.getHeaderField("Location"), extra);
		redirectCount++;
	}
       //获取到图像流
	InputStream imageStream;
	try {
		imageStream = conn.getInputStream();
	} catch (IOException e) {
		// Read all data to allow reuse connection (http://bit.ly/1ad35PY)
		IoUtils.readAndCloseStream(conn.getErrorStream());
		throw e;
	}
	if (!shouldBeProcessed(conn)) {
		IoUtils.closeSilently(imageStream);
		throw new IOException("Image request failed with response code " + conn.getResponseCode());
	}
       //对图像流数据进行包装
	return new ContentLengthInputStream(new BufferedInputStream(imageStream, BUFFER_SIZE), conn.getContentLength());
}
 

import com.nostra13.universalimageloader.utils.IoUtils; //导入方法依赖的package包/类
protected InputStream getStreamFromNetwork(String imageUri, Object extra) throws IOException {
    HttpURLConnection conn = createConnection(imageUri, extra);
    int redirectCount = 0;
    while (conn.getResponseCode() / 100 == 3 && redirectCount < 5) {
        conn = createConnection(conn.getHeaderField(HttpRequest.HEADER_LOCATION), extra);
        redirectCount++;
    }
    try {
        return new ContentLengthInputStream(new BufferedInputStream(conn.getInputStream(), 32768), conn.getContentLength());
    } catch (IOException e) {
        IoUtils.readAndCloseStream(conn.getErrorStream());
        throw e;
    }
}