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parser.go
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parser.go
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package warewulfd
import (
"net/http"
"strconv"
"strings"
"github.com/pkg/errors"
"github.com/warewulf/warewulf/internal/pkg/wwlog"
)
type parserInfo struct {
hwaddr string
ipaddr string
remoteport int
assetkey string
uuid string
stage string
overlay string
efifile string
compress string
}
func parseReq(req *http.Request) (parserInfo, error) {
var ret parserInfo
url := strings.Split(req.URL.Path, "?")[0]
path_parts := strings.Split(url, "/")
if len(path_parts) < 3 {
return ret, errors.New("unknown path components in GET")
}
// handle when stage was passed in the url path /[stage]/hwaddr
stage := path_parts[1]
hwaddr := ""
if stage != "efiboot" {
hwaddr = path_parts[2]
hwaddr = strings.ReplaceAll(hwaddr, "-", ":")
hwaddr = strings.ToLower(hwaddr)
} else if len(path_parts) > 3 {
ret.efifile = strings.Join(path_parts[2:], "/")
} else {
ret.efifile = path_parts[2]
}
ret.hwaddr = hwaddr
ret.ipaddr = strings.Split(req.RemoteAddr, ":")[0]
ret.remoteport, _ = strconv.Atoi(strings.Split(req.RemoteAddr, ":")[1])
if len(req.URL.Query()["assetkey"]) > 0 {
ret.assetkey = req.URL.Query()["assetkey"][0]
}
if len(req.URL.Query()["uuid"]) > 0 {
ret.uuid = req.URL.Query()["uuid"][0]
}
if len(req.URL.Query()["stage"]) > 0 {
ret.stage = req.URL.Query()["stage"][0]
} else {
if stage == "ipxe" || stage == "provision" {
ret.stage = "ipxe"
} else if stage == "kernel" {
ret.stage = "kernel"
} else if stage == "kmods" {
ret.stage = "kmods"
} else if stage == "container" {
ret.stage = "container"
} else if stage == "overlay-system" {
ret.stage = "system"
} else if stage == "overlay-runtime" {
ret.stage = "runtime"
} else if stage == "efiboot" {
ret.stage = "efiboot"
}
}
if len(req.URL.Query()["overlay"]) > 0 {
ret.overlay = req.URL.Query()["overlay"][0]
}
if len(req.URL.Query()["compress"]) > 0 {
ret.compress = req.URL.Query()["compress"][0]
}
if ret.stage == "" {
return ret, errors.New("no stage encoded in GET")
}
if ret.hwaddr == "" {
ret.hwaddr = ArpFind(ret.ipaddr)
wwlog.Verbose("node mac not encoded, arp cache got %s for %s", ret.hwaddr, ret.ipaddr)
if ret.hwaddr == "" {
return ret, errors.New("no hwaddr encoded in GET")
}
}
if ret.ipaddr == "" {
return ret, errors.New("could not obtain ipaddr from HTTP request")
}
if ret.remoteport == 0 {
return ret, errors.New("could not obtain remote port from HTTP request: " + req.RemoteAddr)
}
return ret, nil
}