我正在使用apache HttpClient
将多个文件发布到服务器。代码如下:
public static HttpResponse stringResponsePost(String urlString, String content, byte[] image,
HttpContext localContext, HttpClient httpclient) throws Exception {
URL url = new URL(URLDecoder.decode(urlString, "utf-8"));
URI u = url.toURI();
HttpPost post = new HttpPost();
post.setURI(u);
MultipartEntity reqEntity = new MultipartEntity();
StringBody sb = new StringBody(content, HTTP_CONTENT_TYPE_JSON, Charset.forName("UTF-8"));
ByteArrayBody ib = new ByteArrayBody(image, HTTP_CONTENT_TYPE_JPEG, "image");
reqEntity.addPart("interview_data", sb);
reqEntity.addPart("interview_image", ib);
post.setEntity(reqEntity);
HttpResponse response = null;
response = httpclient.execute(post, localContext);
return response;
}
问题是,MultipartEntity
类只有isChunked()
方法(总是返回 false),如果我希望为我的多部分实体启用查克编码,则没有"setChunked(布尔)"选项。
我的问题是:
根据协议规范,HTTP 多部分和分块可以共存吗?如果没有,为什么像
InputStreamEntity
类这样的其他实体setChunked(boolean)
MultipartEntity
没有?有没有办法在启用分块的情况下"一次"发布多个文件,最好是使用 apache 库?
我的第二个问题有一个解决方案,诀窍是将MultipartEntity
写入ByteArrayOutputStream
,从ByteArrayOutputStream
创建一个ByteArrayEntity
并启用分块。这是代码:
ByteArrayOutputStream bArrOS = new ByteArrayOutputStream();
// reqEntity is the MultipartEntity instance
reqEntity.writeTo(bArrOS);
bArrOS.flush();
ByteArrayEntity bArrEntity = new ByteArrayEntity(bArrOS.toByteArray());
bArrOS.close();
bArrEntity.setChunked(true);
bArrEntity.setContentEncoding(reqEntity.getContentEncoding());
bArrEntity.setContentType(reqEntity.getContentType());
// Set ByteArrayEntity to HttpPost
post.setEntity(bArrEntity);