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Support HTTP-API for fetching reload result. v5.0.176 v6.0.71 (#3779)

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## Reload Error Ignore

During a Reload, several stages will be passed through:
1. Parsing new configurations: Parse.
2. Transforming configurations: Transform.
3. Applying configurations: Apply.

Previously, any error at any stage would result in a direct exit, making
the system completely dependent on configuration checks:

```bash
./objs/srs -c conf/srs.conf -t
echo $?
#0
```

Optimized to: If an error occurs before applying the configuration, it
can be ignored. If an error occurs during the application of the
configuration, some of the configuration may have already taken effect,
leading to unpredictable behavior, so SRS will exit directly.

## Reload Fetch API

Added a new HTTP API to query the result of the reload.

```nginx
http_api {
    enabled         on;
    raw_api {
        enabled on;
        allow_reload on;
    }
}
```

```bash
curl http://localhost:1985/api/v1/raw?rpc=reload-fetch
```

```json
{
  "code": 0,
  "data": {
    "err": 0,
    "msg": "Success",
    "state": 0,
    "rid": "0s6y0n9"
  }
}

{
  "code": 0,
  "data": {
    "err": 1023,
    "msg": "code=1023(ConfigInvalid) : parse file : parse buffer containers/conf/srs.release-local.conf : root parse : parse dir : parse include buffer containers/data/config/srs.vhost.conf : read token, line=0, state=0 : line 3: unexpected end of file, expecting ; or \"}\"",
    "state": 1,
    "rid": "0g4z471"
  }
}
```

This way, you can know if the last reload of the system was successful.

---------

Co-authored-by: Haibo Chen <495810242@qq.com>
This commit is contained in:
Winlin 2023-08-30 19:11:57 +08:00 • committed by GitHub
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@ -651,8 +651,8 @@ stream_caster {
# The available variables:
# [stream] The video channel codec ID.
output rtmp://127.0.0.1/live/[stream];
# The listen TCP/UDP port for stream converter.
# For gb28181 converter, listen at TCP/UDP port. for example, 9000.
# The listen TCP port for stream converter.
# For gb28181 converter, listen at TCP port. for example, 9000.
# @remark We always enable bundle for media streams at this port.
listen 9000;
# SIP server for GB28181. Please note that this is only a demonstrated SIP server, please never use it in your
@ -662,7 +662,7 @@ stream_caster {
# Whether enable embedded SIP server.
# Default: on
enabled on;
# The SIP listen port, for both TCP and UDP protocol.
# The SIP listen port, for TCP protocol.
# Default: 5060
listen 5060;
# The SIP or media transport timeout in seconds.