Android - 将图像发送到服务器会产生巨大的 HTTP 请求

Question

我目前正在通过将图像编码为 base64 字符串来将图像发送到我的服务器，如下所示：https://gist.github.com/fabdarice/a4006a97171cc415892e

但是，当我查看 HTTP POST 请求时，我看到的是这样的：

{"login"=>"Jerem", "mobile_upload_file"=>"data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAAEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEB\nAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/2wBDAQEBAQEBAQEBAQEBAQEBAQEBAQEB\nAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQH/wAARCAQ4BDgDASIA\nAhEBAxEB/8QAHwAAAQUBAQEBAQEAAAAAAAAAAAECAwQFBgcICQoL/8QAtRAAAgEDAwIEAwUFBAQA\nAAF9AQIDAAQRBRIhMUEGE1FhByJxFDKBkaEII0KxwRVS0fAkM2JyggkKFhcYGRolJicoKSo0NTY3\nODk6Q0RFRkdISUpTVFVWV1hZWmNkZWZnaGlqc3R1dnd4eXqDhIWGh4iJipKTlJWWl5iZmqKjpKWm\np6ipqrKztLW2t7i5usLDxMXGx8jJytLT1NXW19jZ2uHi4+Tl5ufo6erx8vP09fb3+Pn6/8QAHwEA\nAwEBAQEBAQEBAQAAAAAAAAECAwQFBgcICQoL/8QAtREAAgECBAQDBAcFBAQAAQJ3....................................}

这会持续一段时间（大约 100 万个字符），这似乎让我的服务器变得迟钝。

我想知道看到发送的字符数量是否正常？如果没有，我应该如何实现将图像发送到服务器的过程？

感谢您的帮助

Answer 1

您可以像这样通过 Multipart 实体在 FileBody 中发送图像...

public String sendMultipartRequestToServer(BusinessDataObject dataObject,String url) {
    String responseString=null;
    HttpResponse response;
    HttpClient client=new DefaultHttpClient();
    HttpPost post=new HttpPost(url);
    HttpConnectionParams.setConnectionTimeout(client.getParams(),50000);
    MultipartEntity multipartEntity=new MultipartEntity(HttpMultipartMode.BROWSER_COMPATIBLE);
    try {
        multipartEntity.addPart(KEY_EMAIL,new StringBody(dataObject.getEmail()));   
        multipartEntity.addPart(KEY_PASSWORD, new StringBody(dataObject.getPassword()));
        multipartEntity.addPart(KEY_IMAGE,new FileBody(new File(Here your image path on your memory)));

    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
            //Setting parameter to post method
        post.setEntity(multipartEntity);
        try {
            response=client.execute(post);
            InputStream inputStream=response.getEntity().getContent();
            responseString=convertStreamToString(inputStream);
        } catch (ClientProtocolException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return responseString;          
}

如果你找不到类 MultipartEntity 。那么你必须在你的项目中添加 HttpMime.jar 。这是迄今为止发送图像的最佳方式，我知道这里不需要在 Base64 中转换图像。你可以通过所选图像的 url 到 FileBody。