Http请求带授权的图片文件

最新推荐文章于 2023-06-20 10:36:05 发布

原创最新推荐文章于 2023-06-20 10:36:05 发布 · 579 阅读

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博客展示了Java代码实现下载PDF文件的功能，通过传入文件路径，利用HttpGet请求获取文件。同时还包含将InputStream转换为Base64字符串的方法，在读取文件流时进行异常处理，最终返回Base64编码后的字符串。

 **private final static String AUTH = "078c8b137f67b39b314c0c36cb34a4e6";**

/**
* 下载PDF文件
*
* @param path 文件路径
* @return 字节数
*/
public String downLoadGet(String path) {
BufferedReader bufferedReader = null;
try {
String downFilesWS = qConfigHelper.getDownFilesWS();
String realPath = downFilesWS + “/files” + path;
logger.info(“电子发票文件地址:{}”, realPath);
HttpGet request = new HttpGet(realPath);
request.setHeader(“Authorization”, "Basic " + AUTH);
HttpResponse response = HttpClients.createDefault().execute(request);

        if (response.getStatusLine().getStatusCode() != 200) {
            logger.warn("下载文件出错:{}", response.getStatusLine().getStatusCode());
            return null;
        }

        if (response.getEntity().getContent() == null) {
            logger.warn("下载文件出错:response.getEntity().getContent() 为空");
            return null;
        }
        InputStream inputStream = response.getEntity().getContent();
        return getBase64FromInputStream(inputStream);

    } catch (Exception e) {
        logger.error("下载pdf文件时异常", e);
        throw new BizException("下载pdf文件时异常", e);
    } finally {
        try {
            if (bufferedReader != null) {
                bufferedReader.close();
            }
        } catch (IOException e) {
            logger.warn("流关闭异常", e);
        }
    }
}

/**
* InputStream 转Base64
*
* @param in 文件流
* @return Base64字符串
*/
private String getBase64FromInputStream(InputStream in) {
byte[] data = null;
// 读取图片字节数组
try {
ByteArrayOutputStream swapStream = new ByteArrayOutputStream();
byte[] buff = new byte[100];
int rc = 0;
while ((rc = in.read(buff, 0, 100)) > 0) {
swapStream.write(buff, 0, rc);
}
data = swapStream.toByteArray();
} catch (IOException e) {
logger.warn(“转换出错”, e);
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
logger.warn(“转换出错”, e);
}
}
}
return new String(Base64.encodeBase64(data));
}