// Reads a ServerConfig from a JSON file.
func ReadServerConfigFromFile(path string) (*ServerConfig, error) {
file, err := os.Open(path)
if err != nil {
return nil, err
}
defer file.Close()
data, err := ioutil.ReadAll(file)
if err != nil {
return nil, err
}
data = base.ConvertBackQuotedStrings(data)
var config *ServerConfig
if err := json.Unmarshal(data, &config); err != nil {
return nil, err
}
// Validation:
if err := config.setupAndValidateDatabases(); err != nil {
return nil, err
}
return config, nil
}
// Reads a ServerConfig from raw data
func ReadServerConfigFromData(data []byte) (*ServerConfig, error) {
data = base.ConvertBackQuotedStrings(data)
var config *ServerConfig
if err := json.Unmarshal(data, &config); err != nil {
return nil, err
}
// Validation:
for name, dbConfig := range config.Databases {
dbConfig.setup(name)
}
return config, nil
}
// Reads a ServerConfig from raw data
func ReadServerConfigFromData(data []byte) (*ServerConfig, error) {
data = base.ConvertBackQuotedStrings(data)
var config *ServerConfig
if err := json.Unmarshal(data, &config); err != nil {
return nil, err
}
// Validation:
if err := config.setupAndValidateDatabases(); err != nil {
return nil, err
}
return config, nil
}
// Fetch a configuration for a database from the ConfigServer
func (sc *ServerContext) getDbConfigFromServer(dbName string) (*DbConfig, error) {
if sc.config.ConfigServer == nil {
return nil, base.HTTPErrorf(http.StatusNotFound, "not_found")
}
urlStr := *sc.config.ConfigServer
if !strings.HasSuffix(urlStr, "/") {
urlStr += "/"
}
urlStr += url.QueryEscape(dbName)
res, err := sc.HTTPClient.Get(urlStr)
if err != nil {
return nil, base.HTTPErrorf(http.StatusBadGateway,
"Error contacting config server: %v", err)
} else if res.StatusCode >= 300 {
return nil, base.HTTPErrorf(res.StatusCode, res.Status)
}
var config DbConfig
var bodyBytes []byte
defer res.Body.Close()
if bodyBytes, err = ioutil.ReadAll(res.Body); err != nil {
return nil, err
}
j := json.NewDecoder(bytes.NewReader(base.ConvertBackQuotedStrings(bodyBytes)))
if err = j.Decode(&config); err != nil {
return nil, base.HTTPErrorf(http.StatusBadGateway,
"Bad response from config server: %v", err)
}
if err = config.setup(dbName); err != nil {
return nil, err
}
return &config, nil
}