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package api
import (
"encoding/json"
"fmt"
"net/http"
"os"
"strconv"
"time"
"github.com/smartystreets/goconvey/web/server/contract"
"github.com/smartystreets/goconvey/web/server/messaging"
)
type HTTPServer struct {
watcher chan messaging.WatcherCommand
executor contract.Executor
latest *contract.CompleteOutput
currentRoot string
longpoll chan chan string
paused bool
}
func (self *HTTPServer) ReceiveUpdate(root string, update *contract.CompleteOutput) {
self.currentRoot = root
self.latest = update
}
func (self *HTTPServer) Watch(response http.ResponseWriter, request *http.Request) {
if request.Method == "POST" {
self.adjustRoot(response, request)
} else if request.Method == "GET" {
response.Write([]byte(self.currentRoot))
}
}
func (self *HTTPServer) adjustRoot(response http.ResponseWriter, request *http.Request) {
newRoot := self.parseQueryString("root", response, request)
if newRoot == "" {
return
}
info, err := os.Stat(newRoot) // TODO: how to unit test?
if !info.IsDir() || err != nil {
http.Error(response, err.Error(), http.StatusNotFound)
return
}
self.watcher <- messaging.WatcherCommand{
Instruction: messaging.WatcherAdjustRoot,
Details: newRoot,
}
}
func (self *HTTPServer) Ignore(response http.ResponseWriter, request *http.Request) {
paths := self.parseQueryString("paths", response, request)
if paths != "" {
self.watcher <- messaging.WatcherCommand{
Instruction: messaging.WatcherIgnore,
Details: paths,
}
}
}
func (self *HTTPServer) Reinstate(response http.ResponseWriter, request *http.Request) {
paths := self.parseQueryString("paths", response, request)
if paths != "" {
self.watcher <- messaging.WatcherCommand{
Instruction: messaging.WatcherReinstate,
Details: paths,
}
}
}
func (self *HTTPServer) parseQueryString(key string, response http.ResponseWriter, request *http.Request) string {
value := request.URL.Query()[key]
if len(value) == 0 {
http.Error(response, fmt.Sprintf("No '%s' query string parameter included!", key), http.StatusBadRequest)
return ""
}
path := value[0]
if path == "" {
http.Error(response, "You must provide a non-blank path.", http.StatusBadRequest)
}
return path
}
func (self *HTTPServer) Status(response http.ResponseWriter, request *http.Request) {
status := self.executor.Status()
response.Write([]byte(status))
}
func (self *HTTPServer) LongPollStatus(response http.ResponseWriter, request *http.Request) {
if self.executor.ClearStatusFlag() {
response.Write([]byte(self.executor.Status()))
return
}
timeout, err := strconv.Atoi(request.URL.Query().Get("timeout"))
if err != nil || timeout > 180000 || timeout < 0 {
timeout = 60000 // default timeout is 60 seconds
}
myReqChan := make(chan string)
select {
case self.longpoll <- myReqChan: // this case means the executor's status is changing
case <-time.After(time.Duration(timeout) * time.Millisecond): // this case means the executor hasn't changed status
return
}
out := <-myReqChan
if out != "" { // TODO: Why is this check necessary? Sometimes it writes empty string...
response.Write([]byte(out))
}
}
func (self *HTTPServer) Results(response http.ResponseWriter, request *http.Request) {
response.Header().Set("Content-Type", "application/json")
response.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
response.Header().Set("Pragma", "no-cache")
response.Header().Set("Expires", "0")
if self.latest != nil {
self.latest.Paused = self.paused
}
stuff, _ := json.Marshal(self.latest)
response.Write(stuff)
}
func (self *HTTPServer) Execute(response http.ResponseWriter, request *http.Request) {
go self.execute()
}
func (self *HTTPServer) execute() {
self.watcher <- messaging.WatcherCommand{Instruction: messaging.WatcherExecute}
}
func (self *HTTPServer) TogglePause(response http.ResponseWriter, request *http.Request) {
instruction := messaging.WatcherPause
if self.paused {
instruction = messaging.WatcherResume
}
self.watcher <- messaging.WatcherCommand{Instruction: instruction}
self.paused = !self.paused
fmt.Fprint(response, self.paused) // we could write out whatever helps keep the UI honest...
}
func NewHTTPServer(
root string,
watcher chan messaging.WatcherCommand,
executor contract.Executor,
status chan chan string) *HTTPServer {
self := new(HTTPServer)
self.currentRoot = root
self.watcher = watcher
self.executor = executor
self.longpoll = status
return self
}
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