Example should read all pending data... about lua-openssl

[imzyxwvu]

I argee. And when ssl:read() returns want_read, the loop should end.

[zhaozg]

according to https://github.com/zhaozg/lua-openssl/blob/master/src/ssl.c#L1417-L1418,
ssl:read([number bytes=ssl:pending()]), will always try to read all pending data if not given bytes to read,
so I think your options are done already.

[imzyxwvu]

I called ssl:read() in my program (without any argument), it didn't read all pending data in the memory bio. Then if I call ssl:read() again, more data will be readed, without any new data pushed to the memory bio.

[zhaozg]

OK, I'll check it, maybe bugs.

[zhaozg]

@imzyxwvu 可能是在读完之后新产生的数据吧，即使实在ssl:read()中加上读取的参数也会出现这种现象

[imzyxwvu]

@zhaozg 不，我自己写的uv绑定，参考那个lib重新实现。我向input mem bio里面写了数据之后有的时候只从ssl对象上read一次只读出了一部分数据，不够，但是接收数据回调没被再次调用。但是如果我在没有往mem bio写入新数据的情况下再调用一次read就能读出剩下的数据。我再翻翻openssl文档。我晚上试试写个程序重现下。

translation: I wrote a libuv binding myself (not luv), so I referenced that lua lib to implement one for my own binding. When I wrote some data to the input mem bio, ssl:read() succeeded but didn't return all data expected, but the on-data callback wasn't trigged any more. So I tried to call ssl:read() again and it returned the left data. I will try to write a program to show you the problem tonight.

[zhaozg]

我最近太忙了，可能没有办法及时解决这个问题，我尽快处理这个问题吧。

I'm busy now, can't solve this problem in a timely, please wait some days to deal with this issue. thanks.

[imzyxwvu]

@zhaozg 我看了下 openssl document，你的C代码没错。ssl底层数据流是由许多records组成的，SSL_pending返回当前正在处理的那一个record中还未读取的字节数，如果一次性写入input bio多个ssl record，那么openssl会依次处理，SSL_pending每次只返回当前正处理的record中剩余的字节数，只有你用SSL_read把当前record读完了，openssl才处理下一个record（如果bio中下一个record还不完整，SSL_pending返回0），这也就是要循环read的原因。

translation: in a word, there is nothing wrong in the C code.

[imzyxwvu]

remember openssl document said that SSL_read may also yields WANT_WRITE.

[zhaozg]

@imzyxwvu thanks

[zhaozg]

https://github.com/zhaozg/lua-openssl/blob/master/ldoc/ssl.lua#L218