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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
parent bb9331186b
commit aa5ec87fcb
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10 changed files with 84 additions and 20 deletions
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16
trunk/src/app/srs_app_config.cpp
View file

@ -1333,18 +1333,22 @@ void SrsConfig::unsubscribe(ISrsReloadHandler* handler)
}
// LCOV_EXCL_START
srs_error_t SrsConfig::reload()
srs_error_t SrsConfig::reload(SrsReloadState *pstate)
{
*pstate = SrsReloadStateInit;
srs_error_t err = srs_success;
SrsConfig conf;
*pstate = SrsReloadStateParsing;
if ((err = conf.parse_file(config_file.c_str())) != srs_success) {
return srs_error_wrap(err, "parse file");
}
srs_info("config reloader parse file success.");
// transform config to compatible with previous style of config.
*pstate = SrsReloadStateTransforming;
if ((err = srs_config_transform_vhost(conf.root)) != srs_success) {
return srs_error_wrap(err, "transform config");
}
@ -1352,11 +1356,13 @@ srs_error_t SrsConfig::reload()
if ((err = conf.check_config()) != srs_success) {
return srs_error_wrap(err, "check config");
}
*pstate = SrsReloadStateApplying;
if ((err = reload_conf(&conf)) != srs_success) {
return srs_error_wrap(err, "reload config");
}
*pstate = SrsReloadStateFinished;
return err;
}
// LCOV_EXCL_STOP