implemented piwigo authentication code with cookiehandling

cmd/DirectoriesToAlbums/main.go

@@ -9,18 +9,11 @@ import (
 
 func main() {
 	flag.Parse()
-	root := flag.Arg(0)
+	rootPath := flag.Arg(0)
 
 	InitializeLog()
 
-	app.AuthenticateToPiwigo()
-	app.ScanLocalDirectories(root)
-	app.GetAllCategoriesFromServer()
-	app.FindMissingAlbums()
-	app.CreateMissingAlbums()
-	app.FindMissingImages()
-	app.UploadImages()
-
+	app.Run(rootPath)
 }
 
 func InitializeLog() {

internal/app/app.go

@@ -3,15 +3,46 @@ package app
 import (
 	"github.com/sirupsen/logrus"
 	"haefelfinger.net/piwigo/DirectoriesToAlbums/internal/pkg/localFileStructure"
+	"haefelfinger.net/piwigo/DirectoriesToAlbums/internal/pkg/piwigo/authentication"
 )
 
-func AuthenticateToPiwigo() {
-	logrus.Warnln("Authenticating to piwigo server (NotImplemented)")
+func Run(rootPath string) {
+	context := ConfigureContext(rootPath)
+
+	loginToPiwigoAndConfigureContext(context)
+
+	//ScanLocalDirectories(context)
+	//GetAllCategoriesFromServer()
+
+	//FindMissingAlbums()
+	//CreateMissingAlbums()
+	//FindMissingImages()
+	//UploadImages()
+
+	authentication.Logout(context.Piwigo)
 }
 
-func ScanLocalDirectories(root string) {
-	fileNodes := localFileStructure.ScanLocalFileStructure(root)
-	logrus.Debugln("filepath.Walk() returned %v\n", fileNodes)
+func ConfigureContext(rootPath string) *AppContext {
+	logrus.Infoln("Preparing application context and configuration")
+
+	context := new(AppContext)
+	context.LocalRootPath = rootPath
+	context.Piwigo = new(authentication.PiwigoContext)
+
+	//TODO: Move this values to configuration files
+	//No, these are not real credentials :-P
+	context.Piwigo.Url = "http://pictures.haefelfinger.net/ws.php?format=json"
+	context.Piwigo.Username = "admin"
+	context.Piwigo.Password = "asdf"
+
+	return context
+}
+
+func ScanLocalDirectories(context *AppContext) {
+	var fileNodes map[string]localFileStructure.FilesystemNode = localFileStructure.ScanLocalFileStructure(context.LocalRootPath)
+	for _, node := range fileNodes {
+		logrus.Debugln("found path entry:", node.Key)
+	}
 }
 
 func GetAllCategoriesFromServer() {
@@ -35,3 +66,15 @@ func FindMissingImages() {
 func UploadImages() {
 	logrus.Warnln("Uploading missing images (NotImplemented)")
 }
+
+func loginToPiwigoAndConfigureContext(context *AppContext) {
+	logrus.Infoln("Logging in to piwigo and getting chunk size configuration for uploads")
+	authentication.Login(context.Piwigo)
+	initializeUploadChunkSize(context)
+}
+
+func initializeUploadChunkSize(context *AppContext) {
+	userStatus := authentication.GetStatus(context.Piwigo)
+	context.ChunkSizeBytes = userStatus.Result.UploadFormChunkSize * 1024
+	logrus.Debugln(context.ChunkSizeBytes)
+}

internal/app/types.go

@@ -0,0 +1,10 @@
+package app
+
+import "haefelfinger.net/piwigo/DirectoriesToAlbums/internal/pkg/piwigo/authentication"
+
+type AppContext struct {
+	Piwigo         *authentication.PiwigoContext
+	SessionId      string
+	LocalRootPath  string
+	ChunkSizeBytes int
+}

internal/pkg/localFileStructure/filesystemScanner.go

@@ -5,8 +5,8 @@ import (
 	"path/filepath"
 )
 
-func ScanLocalFileStructure(path string) map[string]FileNode {
-	fileMap := make(map[string]FileNode)
+func ScanLocalFileStructure(path string) map[string]FilesystemNode {
+	fileMap := make(map[string]FilesystemNode)
 
 	err := filepath.Walk(path, func(p string, info os.FileInfo, err error) error {
 		if path == p {
@@ -15,10 +15,10 @@ func ScanLocalFileStructure(path string) map[string]FileNode {
 
 		//TODO: Only allow jpg and png files here
 
-		fileMap[p] = FileNode{
-			key:   p,
-			name:  info.Name(),
-			isDir: info.IsDir(),
+		fileMap[p] = FilesystemNode{
+			Key:   p,
+			Name:  info.Name(),
+			IsDir: info.IsDir(),
 		}
 		return nil
 	})

internal/pkg/localFileStructure/types.go

@@ -1,7 +1,13 @@
 package localFileStructure
 
-type FileNode struct {
-	key   string
-	name  string
-	isDir bool
+import "fmt"
+
+type FilesystemNode struct {
+	Key   string
+	Name  string
+	IsDir bool
+}
+
+func (n *FilesystemNode) String() string {
+	return fmt.Sprintf("FilesystemNode: %s", n.Key)
 }

internal/pkg/piwigo/authentication/authentication.go

@@ -0,0 +1,114 @@
+package authentication
+
+import (
+	"encoding/json"
+	"fmt"
+	"github.com/sirupsen/logrus"
+	"net/http"
+	"net/http/cookiejar"
+	"net/url"
+	"strings"
+)
+
+func Login(context *PiwigoContext) {
+
+	logrus.Debugf("Logging in to %s using user %s", context.Url, context.Username)
+
+	if !strings.HasPrefix(context.Url,"https") {
+		logrus.Warnf("The server url %s does not use https! Credentials are not encrypted!", context.Url)
+	}
+
+	initializeCookieJarIfRequired(context)
+
+	formData := url.Values{}
+	formData.Set("method", "pwg.session.login")
+	formData.Set("username", context.Username)
+	formData.Set("password", context.Password)
+
+	client := http.Client{Jar: context.Cookies}
+
+	response, err := client.PostForm(context.Url, formData)
+
+	if err == nil {
+		var loginResponse LoginResponse
+		if err := json.NewDecoder(response.Body).Decode(&loginResponse); err != nil {
+			logrus.Errorln(err)
+		}
+
+		if loginResponse.Status != "ok" {
+			errorMessage := fmt.Sprintf("Login failed: %d - %s", loginResponse.ErrorNumber, loginResponse.Message)
+			logrus.Errorf(errorMessage)
+			panic(errorMessage)
+		}
+
+		logrus.Infof("Login succeeded: %s", loginResponse.Status)
+	} else {
+		logrus.Errorln("The HTTP request failed with error %s", err)
+	}
+}
+
+func Logout(context *PiwigoContext) {
+	logrus.Debugf("Logging out from %s", context.Url)
+
+	initializeCookieJarIfRequired(context)
+
+	formData := url.Values{}
+	formData.Set("method", "pwg.session.logout")
+
+	client := http.Client{Jar: context.Cookies}
+	response, err := client.PostForm(context.Url, formData)
+
+	if err == nil {
+		var statusResponse LogoutResponse
+		if err := json.NewDecoder(response.Body).Decode(&statusResponse); err != nil {
+			logrus.Errorln(err)
+		}
+
+		if statusResponse.Status == "ok" {
+			logrus.Infof("Successfully logged out from %s", context.Url)
+		} else {
+			logrus.Errorf("Logout from %s failed", context.Url)
+		}
+	} else {
+		logrus.Errorln("The HTTP request failed with error %s", err)
+	}
+}
+
+func GetStatus(context *PiwigoContext) *GetStatusResponse {
+
+	logrus.Debugln("Getting current login state...")
+
+	initializeCookieJarIfRequired(context)
+
+	formData := url.Values{}
+	formData.Set("method", "pwg.session.getStatus")
+
+	client := http.Client{Jar: context.Cookies}
+	response, err := client.PostForm(context.Url, formData)
+
+	if err == nil {
+		var statusResponse GetStatusResponse
+		if err := json.NewDecoder(response.Body).Decode(&statusResponse); err != nil {
+			logrus.Errorln(err)
+		}
+
+		if statusResponse.Status != "ok" {
+			logrus.Errorf("Could not get session state from %s", context.Url)
+		}
+
+		return &statusResponse
+	} else {
+		logrus.Errorln("The HTTP request failed with error %s\n", err)
+	}
+	return nil
+}
+
+func initializeCookieJarIfRequired(context *PiwigoContext) {
+	if context.Cookies != nil {
+		return
+	}
+
+	options := cookiejar.Options{}
+	jar, _ := cookiejar.New(&options)
+	context.Cookies = jar
+}

internal/pkg/piwigo/authentication/types.go

@@ -1,7 +1,39 @@
 package authentication
 
-type PiwigoConfig struct {
-	url      string
-	username string
-	password string
+import "net/http/cookiejar"
+
+type PiwigoContext struct {
+	Url      string
+	Username string
+	Password string
+	Cookies  *cookiejar.Jar
+}
+
+type LoginResponse struct {
+	Status      string `json:"stat"`
+	Result      bool   `json:"result"`
+	ErrorNumber int    `json:"err"`
+	Message     string `json:"message"`
+}
+
+type GetStatusResponse struct {
+	Status string `json:"stat"`
+	Result struct {
+		Username            string   `json:"username"`
+		Status              string   `json:"status"`
+		Theme               string   `json:"theme"`
+		Language            string   `json:"language"`
+		PwgToken            string   `json:"pwg_token"`
+		Charset             string   `json:"charset"`
+		CurrentDatetime     string   `json:"current_datetime"`
+		Version             string   `json:"version"`
+		AvailableSizes      []string `json:"available_sizes"`
+		UploadFileTypes     string   `json:"upload_file_types"`
+		UploadFormChunkSize int      `json:"upload_form_chunk_size"`
+	} `json:"result"`
+}
+
+type LogoutResponse struct {
+	Status string `json:"stat"`
+	Result bool   `json:"result"`
 }