如何使用 Apache httpclient 获得自定义的 Content-Disposition 行? [英] How can I get a custom Content-Disposition line using Apache httpclient?

问题描述

我正在使用此处的答案来尝试制作POST 请求上传数据，但我对服务器端有不寻常的要求.服务器是一个 PHP 脚本，它需要 Content-Disposition 行上的 filename，因为它需要上传文件.

I am using the answer here to try to make a POST request with a data upload, but I have unusual requirements from the server-side. The server is a PHP script which requires a filename on the Content-Disposition line, because it is expecting a file upload.

Content-Disposition: form-data; name="file"; filename="-"

但是，在客户端，我想发布一个内存缓冲区(在本例中为字符串)而不是文件，但让服务器将其处理为文件上传.

However, on the client side, I would like to post an in-memory buffer (in this case a String) instead of a file, but have the server process it as though it were a file upload.

但是，使用 StringBody 我无法在 Content-Disposition 行上添加必需的 filename 字段.因此，我尝试使用 FormBodyPart，但这只是将 filename 放在单独的行上.

However, using StringBody I cannot add the required filename field on the Content-Disposition line. Thus, I tried to use FormBodyPart, but that just put the filename on a separate line.

HttpPost httppost = new HttpPost(url);
MultipartEntity entity = new MultipartEntity();
ContentBody body = new StringBody(data,                              
         org.apache.http.entity.ContentType.APPLICATION_OCTET_STREAM);
FormBodyPart fbp = new FormBodyPart("file", body); 
fbp.addField("filename", "-");                     
entity.addPart(fbp);                               
httppost.setEntity(entity);            

如何将 filename 放入 Content-Disposition 行，而无需先将 String 写入文件然后再读回又出来了?

How can I get a filename into the Content-Disposition line, without first writing my String into a file and then reading it back out again?

推荐答案

试试这个

StringBody stuff = new StringBody("stuff");
FormBodyPart customBodyPart = new FormBodyPart("file", stuff) {

    @Override
    protected void generateContentDisp(final ContentBody body) {
        StringBuilder buffer = new StringBuilder();
        buffer.append("form-data; name=\"");
        buffer.append(getName());
        buffer.append("\"");
        buffer.append("; filename=\"-\"");
        addField(MIME.CONTENT_DISPOSITION, buffer.toString());
    }

};
MultipartEntity entity = new MultipartEntity();
entity.addPart(customBodyPart);

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