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### Description

This is a longstanding error when using websockets or the HTTP client (this one is a bit newer, didn't see it for long). Searching the net has led me here: https://lists.kamailio.org/pipermail/sr-users/2018-January/099881.html It looks like Kamailio cannot parse HTTP responses, but that message is ambigous. Why would it try to parse them in the first place?

``` 32(203) ERROR: <core> [core/parser/msg_parser.c:748]: parse_msg(): ERROR: parse_msg: message=<HTTP/1.1 100 Continue ```

``` 47(89) ERROR: <core> [core/parser/msg_parser.c:681]: parse_msg(): ERROR: parse_msg: message=<HTTP/1.1 101 Switching Protocols ```

<!-- Explain what you did, what you expected to happen, and what actually happened. -->

### Troubleshooting

Except confirming that the messages are legit, there is nothing else that I can do.

#### Reproduction

<!-- If the issue can be reproduced, describe how it can be done. -->

The first error is generated by making HTTP requests using the HTTP client embedded in Kamailio. The second error happens on each WebRTC call served by Kamailio.

#### Debugging Data

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gdb /path/to/kamailio /path/to/corefile bt full info locals list

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``` (paste your debugging data here) ```

#### Log Messages

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``` (paste your log messages here) ```

#### SIP Traffic

<!-- If the issue is exposed by processing specific SIP messages, grab them with ngrep or save in a pcap file, then add them next, or attach to issue, or provide a link to download them (e.g., to a pastebin site). -->

``` (paste your sip traffic here) ```

### Possible Solutions

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HTTP responses should not go through the core message parser. Not sure if this can be described as a "solution".

### Additional Information

* **Kamailio Version** - output of `kamailio -v`

For the 100 parsing error. The used HTTP clients are `http_client` and `http_async_client` modules.

``` # kamailio -v version: kamailio 5.5.4 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLOCKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 8.3.0 ```

For the 101 parsing error. Kamailio is a WebRTC server for `sipML5` library.

``` # kamailio -v version: kamailio 5.4.4 (x86_64/linux) flags: USE_TCP, USE_TLS, USE_SCTP, TLS_HOOKS, USE_RAW_SOCKS, DISABLE_NAGLE, USE_MCAST, DNS_IP_HACK, SHM_MMAP, PKG_MALLOC, Q_MALLOC, F_MALLOC, TLSF_MALLOC, DBG_SR_MEMORY, USE_FUTEX, FAST_LOCK-ADAPTIVE_WAIT, USE_DNS_CACHE, USE_DNS_FAILOVER, USE_NAPTR, USE_DST_BLACKLIST, HAVE_RESOLV_RES, TLS_PTHREAD_MUTEX_SHARED ADAPTIVE_WAIT_LOOPS 1024, MAX_RECV_BUFFER_SIZE 262144, MAX_URI_SIZE 1024, BUF_SIZE 65535, DEFAULT PKG_SIZE 8MB poll method support: poll, epoll_lt, epoll_et, sigio_rt, select. id: unknown compiled with gcc 8.3.0

```

* **Operating System**:

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``` # uname -a Linux gke-dev-1-sbc-out-dbbddabc-amiw 5.4.0-1054-gke #57-Ubuntu SMP Fri Oct 1 03:16:03 UTC 2021 x86_64 GNU/Linux ```

``` # lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 10 (buster) Release: 10 Codename: buster

```