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port_server.go
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port_server.go
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package proxy
import (
"fmt"
"log"
"net/http"
"strconv"
"strings"
"sync"
)
type portServer struct {
apiServers map[int]map[string]*APIServer
manager *APIServerManager
}
func newPortServer(manager *APIServerManager) *portServer {
ps := &portServer{
apiServers: make(map[int]map[string]*APIServer),
manager: manager,
}
for _, signConf := range manager.serverConf.Server {
if !signConf.Enable {
log.Println("server ", signConf.Name, signConf.Port, " is not enable,skip")
continue
}
ps.addServer(signConf)
}
return ps
}
// AddServer add new server
func (ps *portServer) addServer(itemConf *serverConfItem) bool {
apiServer := newAPIServer(itemConf, ps.manager)
log.Println("add server", apiServer.serverName())
if _, has := ps.apiServers[itemConf.Port]; !has {
ps.apiServers[itemConf.Port] = make(map[string]*APIServer)
}
ps.apiServers[itemConf.Port][apiServer.subDomain()] = apiServer
return true
}
// ServeHTTP serve all http request
// mutil ports
func (ps *portServer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
hostInfo := strings.Split(req.Host, ":")
host := hostInfo[0]
port := 80
if len(hostInfo) == 2 {
var err error
port, err = strconv.Atoi(hostInfo[1])
if err != nil {
rw.WriteHeader(http.StatusBadRequest)
rw.Write([]byte("bad request"))
return
}
}
apiServer := ps.getAPIServer(port, host)
logMsg := req.RemoteAddr + " " + req.RequestURI + " " + req.Referer()
if apiServer == nil {
log.Println(logMsg, "app not found,404")
rw.WriteHeader(http.StatusNotFound)
rw.Write([]byte("app not found\n----------------\npowered by api-manager"))
return
}
log.Println(logMsg, "server is:", apiServer.serverName())
apiServer.ServeHTTP(rw, req)
}
func (ps *portServer) getAPIServer(port int, hostName string) *APIServer {
as, has := ps.apiServers[port]
if !has || len(as) == 0 {
return nil
}
hasOneServer := len(as) == 1
//no server name or has just one server
//return the default server
if ps.manager.serverConf.ServerName == "" || hasOneServer {
for _, item := range as {
domain := item.subDomain()
if domain == "" {
return item
}
}
if !hasOneServer {
return nil
}
}
if !strings.HasSuffix(hostName, "."+ps.manager.serverConf.ServerName) {
return nil
}
i := len(hostName) - len(ps.manager.serverConf.ServerName) - 1
subDoamin := hostName[:i]
server, has := as[subDoamin]
if !has {
return nil
}
return server
}
func (ps *portServer) start() {
var wg sync.WaitGroup
log.Println("ports total:", len(ps.apiServers))
for port := range ps.apiServers {
wg.Add(1)
go (func(port int) {
addr := fmt.Sprintf(":%d", port)
log.Println(addr, "start")
err := http.ListenAndServe(addr, ps)
log.Println(addr, "exit:", err)
wg.Done()
})(port)
}
wg.Wait()
log.Println("portServer exit")
}