jiazhenjiang opened a new issue, #2185:
URL: https://github.com/apache/brpc/issues/2185
**Describe the bug (描述bug)**
通过postman以multipart/formdata格式发送文件到server
，文件内容只有一行 "this is a test file"
后端通过如下方式读出文件
int fd = open("./test", O_CREAT | O_WRONLY, 0666);
ssize_t size = cntl->request_attachment().cut_into_file_descriptor(fd);
读出的内容如下：
"----------------------------451632670443248613692974
Content-Disposition: form-data; name="file"; filename="test_file2.txt"
Content-Type: text/plain
this is a test file too
``
----------------------------451632670443248613692974--"
**To Reproduce (复现方法)**
**Expected behavior (期望行为)**
只读出文件内容，而不携带http请求信息
**Versions (各种版本)**
OS:
Compiler:
brpc:
protobuf:
**Additional context/screenshots (更多上下文/截图)**
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