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api/server: better error checking to avoid unnecessary panics

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Docker-DCO-1.1-Signed-off-by: Solomon Hykes <solomon@docker.com> (github: shykes)
This commit is contained in:
Solomon Hykes 2014-05-01 16:08:39 -07:00
parent cefb0d1277
commit f37ce76bf6
1 changed files with 6 additions and 0 deletions
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6
api/server/server.go
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@ -1267,6 +1267,9 @@ func ListenAndServe(proto, addr string, job *engine.Job) error {
// ServeApi loops through all of the protocols sent in to docker and spawns
// off a go routine to setup a serving http.Server for each.
func ServeApi(job *engine.Job) engine.Status {
if len(job.Args) == 0 {
return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
}
var (
protoAddrs = job.Args
chErrors = make(chan error, len(protoAddrs))
@ -1279,6 +1282,9 @@ func ServeApi(job *engine.Job) engine.Status {
for _, protoAddr := range protoAddrs {
protoAddrParts := strings.SplitN(protoAddr, "://", 2)
if len(protoAddrParts) != 2 {
return job.Errorf("usage: %s PROTO://ADDR [PROTO://ADDR ...]", job.Name)
}
go func() {
log.Printf("Listening for HTTP on %s (%s)\n", protoAddrParts[0], protoAddrParts[1])
chErrors <- ListenAndServe(protoAddrParts[0], protoAddrParts[1], job)