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forgejo/vendor/github.com/couchbaselabs/go-couchbase/port_map.go

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package couchbase
/*
The goal here is to map a hostname:port combination to another hostname:port
combination. The original hostname:port gives the name and regular KV port
of a couchbase server. We want to determine the corresponding SSL KV port.
To do this, we have a pool services structure, as obtained from
the /pools/default/nodeServices API.
For a fully configured two-node system, the structure may look like this:
{"rev":32,"nodesExt":[
{"services":{"mgmt":8091,"mgmtSSL":18091,"fts":8094,"ftsSSL":18094,"indexAdmin":9100,"indexScan":9101,"indexHttp":9102,"indexStreamInit":9103,"indexStreamCatchup":9104,"indexStreamMaint":9105,"indexHttps":19102,"capiSSL":18092,"capi":8092,"kvSSL":11207,"projector":9999,"kv":11210,"moxi":11211},"hostname":"172.23.123.101"},
{"services":{"mgmt":8091,"mgmtSSL":18091,"indexAdmin":9100,"indexScan":9101,"indexHttp":9102,"indexStreamInit":9103,"indexStreamCatchup":9104,"indexStreamMaint":9105,"indexHttps":19102,"capiSSL":18092,"capi":8092,"kvSSL":11207,"projector":9999,"kv":11210,"moxi":11211,"n1ql":8093,"n1qlSSL":18093},"thisNode":true,"hostname":"172.23.123.102"}]}
In this case, note the "hostname" fields, and the "kv" and "kvSSL" fields.
For a single-node system, perhaps brought up for testing, the structure may look like this:
{"rev":66,"nodesExt":[
{"services":{"mgmt":8091,"mgmtSSL":18091,"indexAdmin":9100,"indexScan":9101,"indexHttp":9102,"indexStreamInit":9103,"indexStreamCatchup":9104,"indexStreamMaint":9105,"indexHttps":19102,"kv":11210,"kvSSL":11207,"capi":8092,"capiSSL":18092,"projector":9999,"n1ql":8093,"n1qlSSL":18093},"thisNode":true}],"clusterCapabilitiesVer":[1,0],"clusterCapabilities":{"n1ql":["enhancedPreparedStatements"]}}
Here, note that there is only a single entry in the "nodeExt" array and that it does not have a "hostname" field.
We will assume that either hostname fields are present, or there is only a single node.
*/
import (
"encoding/json"
"fmt"
"strconv"
"strings"
)
func ParsePoolServices(jsonInput string) (*PoolServices, error) {
ps := &PoolServices{}
err := json.Unmarshal([]byte(jsonInput), ps)
return ps, err
}
func MapKVtoSSL(hostport string, ps *PoolServices) (string, error) {
colonIndex := strings.LastIndex(hostport, ":")
if colonIndex < 0 {
return "", fmt.Errorf("Unable to find host/port separator in %s", hostport)
}
host := hostport[0:colonIndex]
port := hostport[colonIndex+1:]
portInt, err := strconv.Atoi(port)
if err != nil {
return "", fmt.Errorf("Unable to parse host/port combination %s: %v", hostport, err)
}
var ns *NodeServices
if len(ps.NodesExt) == 1 {
ns = &(ps.NodesExt[0])
} else {
for i := range ps.NodesExt {
hostname := ps.NodesExt[i].Hostname
if len(hostname) == 0 {
// in case of missing hostname, check for 127.0.0.1
hostname = "127.0.0.1"
}
if hostname == host {
ns = &(ps.NodesExt[i])
break
}
}
}
if ns == nil {
return "", fmt.Errorf("Unable to parse host/port combination %s: no matching node found among %d", hostport, len(ps.NodesExt))
}
kv, found := ns.Services["kv"]
if !found {
return "", fmt.Errorf("Unable to map host/port combination %s: target host has no kv port listed", hostport)
}
kvSSL, found := ns.Services["kvSSL"]
if !found {
return "", fmt.Errorf("Unable to map host/port combination %s: target host has no kvSSL port listed", hostport)
}
if portInt != kv {
return "", fmt.Errorf("Unable to map hostport combination %s: expected port %d but found %d", hostport, portInt, kv)
}
return fmt.Sprintf("%s:%d", host, kvSSL), nil
}