about the res_stream_threshold_

[kunknu]

environment：x86 ubuntu 20.04
crow version : 0.3
C++ 14

In my project, I used the server to respond to a request and returned data with an image encoded as base64, which exceeded 1MB in size. When I checked the source code, I found that there was a size limit (res_stream_threshold_) when sending data. When I sent data exceeding this size, an error occurred. My ability is relatively low and I cannot make the correct modifications, but as long as I increase this limit, I can work correctly. Will this change cause problems elsewhere

Error log before modification :
(2023-06-29 01:29:24) [INFO ] Crow/0.3 server is running at 0.0.0.0:5008 using 20 threads
(2023-06-29 01:29:24) [INFO ] Call app.loglevel(crow::LogLevel::Warning) to hide Info level logs.
(2023-06-29 01:29:29) [DEBUG ] 0x7fbba4009590 timer cancelled: 0 0
(2023-06-29 01:29:29) [DEBUG ] timer add inside: 0x7fbbfd3ff650 0
(2023-06-29 01:29:29) [DEBUG ] 0x7fbba4009590 timer added: 0x7fbbfd3ff650 0
(2023-06-29 01:29:29) [DEBUG ] 0x7fbba4009590 timer cancelled: 0x7fbbfd3ff650 0
(2023-06-29 01:29:29) [INFO ] Request: 127.0.0.1:41978 0x7fbba4009590 HTTP/1.1 POST /cv/pig-counting/1.0.1/
(2023-06-29 01:29:29) [DEBUG ] Matched rule '/cv/pig-counting/1.0.1/' 3 / 8

(2023-06-29 01:29:42) [DEBUG ] 0x7fbb4c003950 timer cancelled: 0 0
(2023-06-29 01:29:42) [DEBUG ] 0x7fbb4c003950 from read(1)
(2023-06-29 01:29:42) [DEBUG ] 0x7fbb4c003950 is_reading 0 is_writing 1
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 timer cancelled: 0 0
(2023-06-29 01:29:43) [DEBUG ] timer add inside: 0x7fbbfb3fb650 0
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 timer added: 0x7fbbfb3fb650 0
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 timer cancelled: 0x7fbbfb3fb650 0
(2023-06-29 01:29:43) [INFO ] Request: 127.0.0.1:43866 0x7fbb4c005010 HTTP/1.1 POST /cv/pig-counting/1.0.1/
(2023-06-29 01:29:43) [DEBUG ] Matched rule '/cv/pig-counting/1.0.1/' 3 / 8
caling[1688002183]-------------------------------
getc size 1048576
(2023-06-29 01:29:43) [INFO ] Response: 0x7fbb4c005010 /cv/pig-counting/1.0.1/ 200 1
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 from write (sync)(1)
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 is_reading 1 is_writing 1
(2023-06-29 01:29:43) [ERROR ] system:9 - happened while sending buffers
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 from write (sync)(2)
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 is_reading 1 is_writing 1
(2023-06-29 01:29:43) [ERROR ] An uncaught exception occurred: write: Bad file descriptor [system:9]
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 timer cancelled: 0 0
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 from read(1)
(2023-06-29 01:29:43) [DEBUG ] 0x7fbb4c005010 is_reading 0 is_writing 1
^C(2023-06-29 01:29:45) [INFO ] Exiting.