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handlers.go
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handlers.go
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package main
import (
"encoding/json"
"fmt"
"github.com/dchest/uniuri"
log "github.com/sirupsen/logrus"
"golang.org/x/oauth2"
"html/template"
"net/http"
"github.com/gorilla/mux"
"strconv"
)
type replyObjects struct {
Title string
Email string
Picture string
Buckets []string
Bucket string
Objects []string
FilesPage []int
FilesOrder []string
Pages []int
CurrentPage int
}
var objectsPerPageOptions []int = []int{25, 50, 100}
var objectsOrderOptions []string = []string{"aZ","zA"}
func loginHandler(w http.ResponseWriter, r *http.Request) {
oauthStateString := uniuri.New()
url := oauthConf.AuthCodeURL(oauthStateString)
tmpl := template.Must(template.ParseFiles("templates/login.tmpl"))
templateData := map[string]interface{}{
"Link": url,
"Title": config.Title,
}
tmpl.ExecuteTemplate(w, "login.tmpl", &templateData)
}
func authHandler(w http.ResponseWriter, r *http.Request) {
code := r.FormValue("code")
token, err := oauthConf.Exchange(oauth2.NoContext, code)
if err != nil {
log.Error(err)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
if !token.Valid() {
log.Error("Fail on Oauth authentication")
http.Redirect(w, r, "/login", http.StatusFound)
return
}
err, user := userInfoFromToken(token)
if err != nil || user.EmailVerified == false {
log.Error(err)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
isAllowed := checkUserAuth(user.Email)
if isAllowed == false {
log.Info("unauthorised user trying to access ", user.Email)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
session, _ := store.Get(r, sessionTokenName)
session.Values["oauth"] = token.AccessToken
err = session.Save(r, w)
if err != nil {
log.Error(err)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
userConfigBucketsAws,userConfigBucketsGcp := getListBucketUserConfig(user.Email)
allowedBuckets := getListBucketUserMatching(userConfigBucketsAws,userConfigBucketsGcp)
if len(allowedBuckets) == 0 {
log.Error("No Buckets allowed for user ", user.Email)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
bucket := getFriendlyBucketName(allowedBuckets[0].Name)
log.Trace(bucket)
http.Redirect(w, r, "/main/"+bucket, http.StatusFound)
}
func bucketHandler(w http.ResponseWriter, r *http.Request) {
session, err := store.Get(r, sessionTokenName)
if err != nil {
log.Error(err)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
token := oauth2.Token{
AccessToken: fmt.Sprintf("%v", session.Values["oauth"]),
}
if !token.Valid() {
log.Error("Failure in Token Validation")
http.Redirect(w, r, "/login", http.StatusFound)
return
}
err, user := userInfoFromToken(&token)
if err != nil || user.EmailVerified == false {
log.Error(err)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
vars := mux.Vars(r)
bucket := getRealBucketName(vars["bucket"])
isAllowed := checkUserAuthBucket(user.Email, bucket)
if isAllowed == false {
log.Info("unauthorised user trying to access ", user.Email)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
userConfigBucketsAws,userConfigBucketsGcp := getListBucketUserConfig(user.Email)
allowedBuckets := getListBucketUserMatching(userConfigBucketsAws,userConfigBucketsGcp)
if len(allowedBuckets) == 0 {
log.Error("No Buckets allowed for user ", user.Email)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
queryParameters := r.URL.Query()
object := queryParameters.Get("object")
// Case to open a Object Signed Url
if object != "" {
presignUrl := getSignedBucketUrl(allowedBuckets, bucket, object)
if presignUrl == "" {
log.Error("Empty signedURL")
http.Redirect(w, r, "/login", http.StatusFound)
return
}
http.Redirect(w, r, presignUrl, http.StatusFound)
return
}
// Case to get the list of Bucket and Objects
orderObjects := queryParameters.Get("orderObjects")
if orderObjects == "" {
orderObjects = objectsOrderOptions[0]
}
objectsList := getBucketObjectsList(allowedBuckets, bucket, orderObjects)
strFilesPage := queryParameters.Get("filesPage")
if strFilesPage == "" {
strFilesPage = strconv.Itoa(objectsPerPageOptions[0])
}
strPage := queryParameters.Get("page")
if strPage == "" {
strPage = "1"
}
filesPage, err := strconv.Atoi(strFilesPage)
if err != nil {
log.Error(err)
filesPage = objectsPerPageOptions[0]
}
page, err := strconv.Atoi(strPage)
if err != nil {
log.Error(err)
page = 1
}
if filesPage == 0 || page == 0 {
filesPage = objectsPerPageOptions[0]
page = 1
}
log.Debug(filesPage)
log.Debug(page)
// Calculate pages and objects to show
numPages := 1
if len(objectsList)%filesPage != 0 {
numPages = len(objectsList)/filesPage + 1
} else {
numPages = len(objectsList)/filesPage
}
// List of Files Order
listFilesOrder := orderStringSlice(orderObjects, objectsOrderOptions)
// List with Objects per Page
listFilesPage := orderIntSlice(filesPage, objectsPerPageOptions)
// Select Objects to retrieve for current page
firstElement := (page-1)*filesPage
lastElement := (page*filesPage)
if lastElement > len(objectsList) {
lastElement = len(objectsList)
}
selectedObjectsList := objectsList[firstElement:lastElement]
// List with pages number 1,2,...
listPages := make([]int, numPages)
for i,_ := range listPages {
listPages[i] = i+1
}
allowedBucketsNames := make([]string, len(allowedBuckets))
for i,v := range allowedBuckets {
allowedBucketsNames[i] = v.Name
}
friendlyBuckets := changeRealToFriendlyBuckets(allowedBucketsNames)
bucket = getFriendlyBucketName(bucket)
tmpl := template.Must(template.ParseFiles("templates/bucket.tmpl"))
log.Trace(friendlyBuckets)
templateData := replyObjects {
Title: config.Title,
Email: user.Email,
Picture: user.Picture,
Buckets: orderStringSlice(bucket, friendlyBuckets),
Bucket: bucket,
Objects: selectedObjectsList,
FilesPage: listFilesPage,
FilesOrder: listFilesOrder,
Pages: listPages,
CurrentPage: page,
}
tmpl.ExecuteTemplate(w, "bucket.tmpl", &templateData)
}
func logoutHandler(w http.ResponseWriter, r *http.Request) {
session, err := store.Get(r, sessionTokenName)
if err != nil {
log.Error(err)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
session.Values["oauth"] = ""
session.Options.MaxAge = -1
err = session.Save(r, w)
if err != nil {
log.Error(err)
http.Redirect(w, r, "/login", http.StatusFound)
return
}
http.Redirect(w, r, "/login", http.StatusFound)
}
func healthHandler(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "application/json")
json.NewEncoder(w).Encode("All Always Ok for Now, need to be improved")
}