[BugReport] Memory Leak on multipart_reader::currentHeaders about cinatra

[vrqq]

build cinatra_example and run this code with python 3:

import socket
import time

s=socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 8080))
print('*Connected')

data1 = b'POST /upload_multipart HTTP/1.1\r\n' \
b'Host: 127.0.0.1\r\n' \
b'User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0\r\n' \
b'Accept: */*\r\n' \
b'Accept-Language: en-US,en;q=0.5\r\n' \
b'Accept-Encoding: gzip, deflate\r\n' \
b'Content-Type: multipart/form-data; boundary=---------------------------191691572411478\r\n' \
b'Content-Length: 925\r\n' \
b'Connection: keep-alive\r\n' \
b'Pragma: no-cache\r\n' \
b'Cache-Control: no-cache\r\n' \
b'\r\n' \
b'-----------------------------191691572411478\r\n' \
b'Content-Disposition: form-data; name="na'

data2 = b'me"\r\n' \
b'\r\n' \
b'plaintext_document_withlongname.txt\r\n' \
b'-----------------------------191691572411478\r\n' \
b'Content-Disposition: form-data; name="type"\r\n' \
b'\r\n' \
b'text/plain\r\n' \
b'-----------------------------191691572411478\r\n' \
b'Content-Disposition: form-data; name="size"\r\n' \
b'\r\n' \
b'259\r\n' \
b'-----------------------------191691572411478\r\n' \
b'Content-Disposition: form-data; name="lastModifiedDate"\r\n' \
b'\r\n' \
b'undefined\r\n' \
b'-----------------------------191691572411478\r\n' \
b'Content-Disposition: form-data; name="file"; filename="plaintext_docu'

data3 = b'ment_withlongname.txt"\r\n' \
b'Content-Type: text/plain\r\n' \
b'\r\n' \
b'The 2011 European Women Basketball Championship, commonly called EuroBasket Women 2011, was the 33rd regional championship held by FIBA Europe. The competition was held in Poland from 2011. This was the 4th time that the EuroBasket Women was hosted by Poland.\r\n' \
b'-----------------------------191691572411478--\r\n'

print (data1 + data2 + data3)

s.send(data1)
print('*SENT -A')
time.sleep(1)
s.send(data2)
print('*SENT -B')
time.sleep(1)
s.send(data3)
print('*SENT -C')
time.sleep(1)

s.close()
print('*Close')

[qicosmos]

谢谢你提交issue，我会关注这个问题。

[vrqq]

可以在feed()函数第一句输出buffer地址来确认这个问题，可以发现对于单次post请求，确实会有概率多次触发feed()函数。

[qicosmos]

用postman怎么做这个测试的？

[vrqq]

sorry我没有用postman，就在用firefox不断上传 27,046Bytes的图

[vrqq]

测试我觉得可以模拟网络丢包试下，也许可以看到分片了。。
还有可以用超长文件名，构建一个加长header。。

server端我是在feed()输出下第一个包的大小，如果第一个包差不多能把header分开，就在断点停一下。
（我更新了第一条，又加了一个bug）

[vrqq]

Hello, I submit a PR, could you have interesting to merge it after testing?...
(It also easy me to use this project)

[qicosmos]

你能准备一个测试的页面或者程序发出来吗，我想先用你提供的测试程序看看问题，确定问题在哪儿，然后再看pr