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plugin_requests.go
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/
plugin_requests.go
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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See LICENSE.txt for license information.
package app
import (
"fmt"
"net/http"
"path"
"path/filepath"
"strings"
"bytes"
"io/ioutil"
"github.com/gorilla/mux"
"github.com/mattermost/mattermost-server/v5/mlog"
"github.com/mattermost/mattermost-server/v5/model"
"github.com/mattermost/mattermost-server/v5/plugin"
"github.com/mattermost/mattermost-server/v5/utils"
)
func (a *App) ServePluginRequest(w http.ResponseWriter, r *http.Request) {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
err := model.NewAppError("ServePluginRequest", "app.plugin.disabled.app_error", nil, "Enable plugins to serve plugin requests", http.StatusNotImplemented)
a.Log.Error(err.Error())
w.WriteHeader(err.StatusCode)
w.Header().Set("Content-Type", "application/json")
w.Write([]byte(err.ToJson()))
return
}
params := mux.Vars(r)
hooks, err := pluginsEnvironment.HooksForPlugin(params["plugin_id"])
if err != nil {
a.Log.Error("Access to route for non-existent plugin", mlog.String("missing_plugin_id", params["plugin_id"]), mlog.Err(err))
http.NotFound(w, r)
return
}
a.servePluginRequest(w, r, hooks.ServeHTTP)
}
func (a *App) ServeInterPluginRequest(w http.ResponseWriter, r *http.Request, sourcePluginId, destinationPluginId string) {
pluginsEnvironment := a.GetPluginsEnvironment()
if pluginsEnvironment == nil {
err := model.NewAppError("ServeInterPluginRequest", "app.plugin.disabled.app_error", nil, "Plugin enviroment not found.", http.StatusNotImplemented)
a.Log.Error(err.Error())
w.WriteHeader(err.StatusCode)
w.Header().Set("Content-Type", "application/json")
w.Write([]byte(err.ToJson()))
return
}
hooks, err := pluginsEnvironment.HooksForPlugin(destinationPluginId)
if err != nil {
a.Log.Error("Access to route for non-existent plugin in inter plugin request",
mlog.String("sourse_plugin_id", sourcePluginId),
mlog.String("destination_plugin_id", destinationPluginId),
mlog.Err(err),
)
http.NotFound(w, r)
return
}
context := &plugin.Context{
RequestId: model.NewId(),
UserAgent: r.UserAgent(),
SourcePluginId: sourcePluginId,
}
hooks.ServeHTTP(context, w, r)
}
// ServePluginPublicRequest serves public plugin files
// at the URL http(s)://$SITE_URL/plugins/$PLUGIN_ID/public/{anything}
func (a *App) ServePluginPublicRequest(w http.ResponseWriter, r *http.Request) {
if strings.HasSuffix(r.URL.Path, "/") {
http.NotFound(w, r)
return
}
// Should be in the form of /$PLUGIN_ID/public/{anything} by the time we get here
vars := mux.Vars(r)
pluginID := vars["plugin_id"]
publicFilesPath, err := a.GetPluginsEnvironment().PublicFilesPath(pluginID)
if err != nil {
http.NotFound(w, r)
return
}
publicFilePath := path.Clean(r.URL.Path)
prefix := fmt.Sprintf("/plugins/%s/public/", pluginID)
if !strings.HasPrefix(publicFilePath, prefix) {
http.NotFound(w, r)
return
}
publicFile := filepath.Join(publicFilesPath, strings.TrimPrefix(publicFilePath, prefix))
http.ServeFile(w, r, publicFile)
}
func (a *App) servePluginRequest(w http.ResponseWriter, r *http.Request, handler func(*plugin.Context, http.ResponseWriter, *http.Request)) {
token := ""
context := &plugin.Context{
RequestId: model.NewId(),
IpAddress: utils.GetIpAddress(r, a.Config().ServiceSettings.TrustedProxyIPHeader),
AcceptLanguage: r.Header.Get("Accept-Language"),
UserAgent: r.UserAgent(),
}
cookieAuth := false
authHeader := r.Header.Get(model.HEADER_AUTH)
if strings.HasPrefix(strings.ToUpper(authHeader), model.HEADER_BEARER+" ") {
token = authHeader[len(model.HEADER_BEARER)+1:]
} else if strings.HasPrefix(strings.ToLower(authHeader), model.HEADER_TOKEN+" ") {
token = authHeader[len(model.HEADER_TOKEN)+1:]
} else if cookie, _ := r.Cookie(model.SESSION_COOKIE_TOKEN); cookie != nil {
token = cookie.Value
cookieAuth = true
} else {
token = r.URL.Query().Get("access_token")
}
r.Header.Del("Mattermost-User-Id")
if token != "" {
session, err := a.GetSession(token)
csrfCheckPassed := false
if err == nil && cookieAuth && r.Method != "GET" {
sentToken := ""
if r.Header.Get(model.HEADER_CSRF_TOKEN) == "" {
bodyBytes, _ := ioutil.ReadAll(r.Body)
r.Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes))
r.ParseForm()
sentToken = r.FormValue("csrf")
r.Body = ioutil.NopCloser(bytes.NewBuffer(bodyBytes))
} else {
sentToken = r.Header.Get(model.HEADER_CSRF_TOKEN)
}
expectedToken := session.GetCSRF()
if sentToken == expectedToken {
csrfCheckPassed = true
}
// ToDo(DSchalla) 2019/01/04: Remove after deprecation period and only allow CSRF Header (MM-13657)
if r.Header.Get(model.HEADER_REQUESTED_WITH) == model.HEADER_REQUESTED_WITH_XML && !csrfCheckPassed {
csrfErrorMessage := "CSRF Check failed for request - Please migrate your plugin to either send a CSRF Header or Form Field, XMLHttpRequest is deprecated"
sid := ""
userId := ""
if session != nil {
sid = session.Id
userId = session.UserId
}
fields := []mlog.Field{
mlog.String("path", r.URL.Path),
mlog.String("ip", r.RemoteAddr),
mlog.String("session_id", sid),
mlog.String("user_id", userId),
}
if *a.Config().ServiceSettings.ExperimentalStrictCSRFEnforcement {
a.Log.Warn(csrfErrorMessage, fields...)
} else {
a.Log.Debug(csrfErrorMessage, fields...)
csrfCheckPassed = true
}
}
} else {
csrfCheckPassed = true
}
if session != nil && err == nil && csrfCheckPassed {
r.Header.Set("Mattermost-User-Id", session.UserId)
context.SessionId = session.Id
}
}
cookies := r.Cookies()
r.Header.Del("Cookie")
for _, c := range cookies {
if c.Name != model.SESSION_COOKIE_TOKEN {
r.AddCookie(c)
}
}
r.Header.Del(model.HEADER_AUTH)
r.Header.Del("Referer")
params := mux.Vars(r)
subpath, _ := utils.GetSubpathFromConfig(a.Config())
newQuery := r.URL.Query()
newQuery.Del("access_token")
r.URL.RawQuery = newQuery.Encode()
r.URL.Path = strings.TrimPrefix(r.URL.Path, path.Join(subpath, "plugins", params["plugin_id"]))
handler(context, w, r)
}