Refactor context out of API packages (#8755)

* Refactor context out of API packages

* Update function names per feedback

* Move webhook handlers to web and fix web tests

* Move more webhook tests out of api package

* Fix static handler

web/web.go

@@ -6,69 +6,38 @@ package web
 import (
 	"fmt"
 	"net/http"
-	"path/filepath"
 	"strings"
 
-	"github.com/NYTimes/gziphandler"
 	"github.com/avct/uasurfer"
+	"github.com/gorilla/mux"
 
-	"github.com/mattermost/mattermost-server/api"
+	"github.com/mattermost/mattermost-server/app"
 	"github.com/mattermost/mattermost-server/mlog"
 	"github.com/mattermost/mattermost-server/model"
 	"github.com/mattermost/mattermost-server/utils"
 )
 
-func Init(api3 *api.API) {
+type Web struct {
+	App        *app.App
+	MainRouter *mux.Router
+}
+
+func NewWeb(a *app.App, root *mux.Router) *Web {
 	mlog.Debug("Initializing web routes")
 
-	mainrouter := api3.BaseRoutes.Root
-
-	if *api3.App.Config().ServiceSettings.WebserverMode != "disabled" {
-		staticDir, _ := utils.FindDir(model.CLIENT_DIR)
-		mlog.Debug(fmt.Sprintf("Using client directory at %v", staticDir))
-
-		staticHandler := staticHandler(http.StripPrefix("/static/", http.FileServer(http.Dir(staticDir))))
-		pluginHandler := pluginHandler(api3.App.Config, http.StripPrefix("/static/plugins/", http.FileServer(http.Dir(*api3.App.Config().PluginSettings.ClientDirectory))))
-
-		if *api3.App.Config().ServiceSettings.WebserverMode == "gzip" {
-			staticHandler = gziphandler.GzipHandler(staticHandler)
-			pluginHandler = gziphandler.GzipHandler(pluginHandler)
-		}
-
-		mainrouter.PathPrefix("/static/plugins/").Handler(pluginHandler)
-		mainrouter.PathPrefix("/static/").Handler(staticHandler)
-		mainrouter.Handle("/{anything:.*}", api3.AppHandlerIndependent(root)).Methods("GET")
+	web := &Web{
+		App:        a,
+		MainRouter: root,
 	}
+
+	web.InitStatic()
+	web.InitWebhooks()
+
+	return web
 }
 
-func staticHandler(handler http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		w.Header().Set("Cache-Control", "max-age=31556926, public")
-		if strings.HasSuffix(r.URL.Path, "/") {
-			http.NotFound(w, r)
-			return
-		}
-		handler.ServeHTTP(w, r)
-	})
-}
-
-func pluginHandler(config model.ConfigFunc, handler http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		if *config().ServiceSettings.EnableDeveloper {
-			w.Header().Set("Cache-Control", "no-cache, no-store, must-revalidate")
-		} else {
-			w.Header().Set("Cache-Control", "max-age=31556926, public")
-		}
-		if strings.HasSuffix(r.URL.Path, "/") {
-			http.NotFound(w, r)
-			return
-		}
-		handler.ServeHTTP(w, r)
-	})
-}
-
-// Due to the complexities of UA detection and the ramifications of a misdetection only older Safari and IE browsers throw incompatibility errors.
-
+// Due to the complexities of UA detection and the ramifications of a misdetection
+// only older Safari and IE browsers throw incompatibility errors.
 // Map should be of minimum required browser version.
 var browserMinimumSupported = map[string]int{
 	"BrowserIE":     11,
@@ -85,24 +54,20 @@ func CheckClientCompatability(agentString string) bool {
 	return true
 }
 
-func root(c *api.Context, w http.ResponseWriter, r *http.Request) {
+func Handle404(a *app.App, w http.ResponseWriter, r *http.Request) {
+	err := model.NewAppError("Handle404", "api.context.404.app_error", nil, "", http.StatusNotFound)
 
-	if !CheckClientCompatability(r.UserAgent()) {
-		w.Header().Set("Cache-Control", "no-store")
-		page := utils.NewHTMLTemplate(c.App.HTMLTemplates(), "unsupported_browser")
-		page.Props["Title"] = c.T("web.error.unsupported_browser.title")
-		page.Props["Message"] = c.T("web.error.unsupported_browser.message")
-		page.RenderToWriter(w)
-		return
+	mlog.Debug(fmt.Sprintf("%v: code=404 ip=%v", r.URL.Path, utils.GetIpAddress(r)))
+
+	if IsApiCall(r) {
+		w.WriteHeader(err.StatusCode)
+		err.DetailedError = "There doesn't appear to be an api call for the url='" + r.URL.Path + "'.  Typo? are you missing a team_id or user_id as part of the url?"
+		w.Write([]byte(err.ToJson()))
+	} else {
+		utils.RenderWebAppError(w, r, err, a.AsymmetricSigningKey())
 	}
-
-	if api.IsApiCall(r) {
-		api.Handle404(c.App, w, r)
-		return
-	}
-
-	w.Header().Set("Cache-Control", "no-cache, max-age=31556926, public")
-
-	staticDir, _ := utils.FindDir(model.CLIENT_DIR)
-	http.ServeFile(w, r, filepath.Join(staticDir, "root.html"))
+}
+
+func IsApiCall(r *http.Request) bool {
+	return strings.Index(r.URL.Path, "/api/") == 0
 }