refactor: use cookie instead of local storage for share token

backend/src/auth/auth.controller.ts

@@ -42,6 +42,7 @@ export class AuthController {
   ) {
     if (!this.config.get("ALLOW_REGISTRATION"))
       throw new ForbiddenException("Registration is not allowed");
+
     const result = await this.authService.signUp(dto);
 
     response = this.addTokensToResponse(

backend/src/file/file.controller.ts

@@ -12,8 +12,6 @@ import {
 import { SkipThrottle } from "@nestjs/throttler";
 import * as contentDisposition from "content-disposition";
 import { Response } from "express";
-import { JwtGuard } from "src/auth/guard/jwt.guard";
-import { FileDownloadGuard } from "src/file/guard/fileDownload.guard";
 import { CreateShareGuard } from "src/share/guard/createShare.guard";
 import { ShareOwnerGuard } from "src/share/guard/shareOwner.guard";
 import { ShareSecurityGuard } from "src/share/guard/shareSecurity.guard";
@@ -44,30 +42,8 @@ export class FileController {
     );
   }
 
-  @Get(":fileId/download")
-  @UseGuards(ShareSecurityGuard)
-  async getFileDownloadUrl(
-    @Param("shareId") shareId: string,
-    @Param("fileId") fileId: string
-  ) {
-    const url = this.fileService.getFileDownloadUrl(shareId, fileId);
-
-    return { url };
-  }
-
-  @Get("zip/download")
-  @UseGuards(ShareSecurityGuard)
-  async getZipArchiveDownloadURL(
-    @Param("shareId") shareId: string,
-    @Param("fileId") fileId: string
-  ) {
-    const url = this.fileService.getFileDownloadUrl(shareId, fileId);
-
-    return { url };
-  }
-
   @Get("zip")
-  @UseGuards(FileDownloadGuard)
+  @UseGuards(ShareSecurityGuard)
   async getZip(
     @Res({ passthrough: true }) res: Response,
     @Param("shareId") shareId: string
@@ -82,7 +58,7 @@ export class FileController {
   }
 
   @Get(":fileId")
-  @UseGuards(FileDownloadGuard)
+  @UseGuards(ShareSecurityGuard)
   async getFile(
     @Res({ passthrough: true }) res: Response,
     @Param("shareId") shareId: string,

backend/src/file/file.service.ts

@@ -136,37 +136,5 @@ export class FileService {
     return fs.createReadStream(`./data/uploads/shares/${shareId}/archive.zip`);
   }
 
-  getFileDownloadUrl(shareId: string, fileId: string) {
-    const downloadToken = this.generateFileDownloadToken(shareId, fileId);
  
-    return `${this.config.get(
-      "APP_URL"
-    )}/api/shares/${shareId}/files/${fileId}?token=${downloadToken}`;
-  }
-
-  generateFileDownloadToken(shareId: string, fileId: string) {
-    if (fileId == "zip") fileId = undefined;
-
-    return this.jwtService.sign(
-      {
-        shareId,
-        fileId,
-      },
-      {
-        expiresIn: "10min",
-        secret: this.config.get("JWT_SECRET"),
-      }
-    );
-  }
-
-  verifyFileDownloadToken(shareId: string, token: string) {
-    try {
-      const claims = this.jwtService.verify(token, {
-        secret: this.config.get("JWT_SECRET"),
-      });
-      return claims.shareId == shareId;
-    } catch {
-      return false;
-    }
-  }
 }

backend/src/file/guard/fileDownload.guard.ts

@@ -1,17 +0,0 @@
-import { CanActivate, ExecutionContext, Injectable } from "@nestjs/common";
-import { Request } from "express";
-import { FileService } from "src/file/file.service";
-
-@Injectable()
-export class FileDownloadGuard implements CanActivate {
-  constructor(private fileService: FileService) {}
-
-  async canActivate(context: ExecutionContext) {
-    const request: Request = context.switchToHttp().getRequest();
-
-    const token = request.query.token as string;
-    const { shareId } = request.params;
-
-    return this.fileService.verifyFileDownloadToken(shareId, token);
-  }
-}

backend/src/share/guard/shareSecurity.guard.ts

@@ -5,7 +5,6 @@ import {
   Injectable,
   NotFoundException,
 } from "@nestjs/common";
-import { Reflector } from "@nestjs/core";
 import { Request } from "express";
 import * as moment from "moment";
 import { PrismaService } from "src/prisma/prisma.service";
@@ -14,14 +13,13 @@ import { ShareService } from "src/share/share.service";
 @Injectable()
 export class ShareSecurityGuard implements CanActivate {
   constructor(
-    private reflector: Reflector,
     private shareService: ShareService,
     private prisma: PrismaService
   ) {}
 
   async canActivate(context: ExecutionContext) {
     const request: Request = context.switchToHttp().getRequest();
-    const shareToken = request.get("X-Share-Token");
+
     const shareId = Object.prototype.hasOwnProperty.call(
       request.params,
       "shareId"
@@ -29,6 +27,8 @@ export class ShareSecurityGuard implements CanActivate {
       ? request.params.shareId
       : request.params.id;
 
+    const shareToken = request.cookies[`share_${shareId}_token`];
+
     const share = await this.prisma.share.findUnique({
       where: { id: shareId },
       include: { security: true },

backend/src/share/share.controller.ts

@@ -7,14 +7,14 @@ import {
   Param,
   Post,
   Req,
+  Res,
   UseGuards,
 } from "@nestjs/common";
 import { Throttle } from "@nestjs/throttler";
 import { User } from "@prisma/client";
-import { Request } from "express";
+import { Request, Response } from "express";
 import { GetUser } from "src/auth/decorator/getUser.decorator";
 import { JwtGuard } from "src/auth/guard/jwt.guard";
-import { ConfigService } from "src/config/config.service";
 import { CreateShareDTO } from "./dto/createShare.dto";
 import { MyShareDTO } from "./dto/myShare.dto";
 import { ShareDTO } from "./dto/share.dto";
@@ -27,10 +27,7 @@ import { ShareTokenSecurity } from "./guard/shareTokenSecurity.guard";
 import { ShareService } from "./share.service";
 @Controller("shares")
 export class ShareController {
-  constructor(
-    private shareService: ShareService,
-    private config: ConfigService
-  ) {}
+  constructor(private shareService: ShareService) {}
 
   @Get()
   @UseGuards(JwtGuard)
@@ -88,10 +85,20 @@ export class ShareController {
   }
 
   @HttpCode(200)
-  @Throttle(10, 5 * 60)
+  @Throttle(20, 5 * 60)
   @UseGuards(ShareTokenSecurity)
   @Post(":id/token")
-  async getShareToken(@Param("id") id: string, @Body() body: SharePasswordDto) {
-    return this.shareService.getShareToken(id, body.password);
+  async getShareToken(
+    @Param("id") id: string,
+    @Res({ passthrough: true }) response: Response,
+    @Body() body: SharePasswordDto
+  ) {
+    const token = await this.shareService.getShareToken(id, body.password);
+    response.cookie(`share_${id}_token`, token, {
+      path: "/",
+      httpOnly: true,
+    });
+
+    return { token };
   }
 }

backend/src/share/share.service.ts

@@ -278,7 +278,7 @@ export class ShareService {
 
     const token = await this.generateShareToken(shareId);
     await this.increaseViewCount(share);
-    return { token };
+    return token;
   }
 
   async generateShareToken(shareId: string) {

frontend/src/services/share.service.ts

@@ -27,21 +27,11 @@ const completeShare = async (id: string) => {
 };
 
 const get = async (id: string): Promise<Share> => {
-  const shareToken = sessionStorage.getItem(`share_${id}_token`);
-  return (
-    await api.get(`shares/${id}`, {
-      headers: { "X-Share-Token": shareToken ?? "" },
-    })
-  ).data;
+  return (await api.get(`shares/${id}`)).data;
 };
 
 const getMetaData = async (id: string): Promise<ShareMetaData> => {
-  const shareToken = sessionStorage.getItem(`share_${id}_token`);
-  return (
-    await api.get(`shares/${id}/metaData`, {
-      headers: { "X-Share-Token": shareToken ?? "" },
-    })
-  ).data;
+  return (await api.get(`shares/${id}/metaData`)).data;
 };
 
 const remove = async (id: string) => {
@@ -53,26 +43,15 @@ const getMyShares = async (): Promise<MyShare[]> => {
 };
 
 const getShareToken = async (id: string, password?: string) => {
-  const { token } = (await api.post(`/shares/${id}/token`, { password })).data;
-
-  sessionStorage.setItem(`share_${id}_token`, token);
+  await api.post(`/shares/${id}/token`, { password });
 };
 
 const isShareIdAvailable = async (id: string): Promise<boolean> => {
   return (await api.get(`shares/isShareIdAvailable/${id}`)).data.isAvailable;
 };
 
-const getFileDownloadUrl = async (shareId: string, fileId: string) => {
-  const shareToken = sessionStorage.getItem(`share_${shareId}_token`);
-  return (
-    await api.get(`shares/${shareId}/files/${fileId}/download`, {
-      headers: { "X-Share-Token": shareToken ?? "" },
-    })
-  ).data.url;
-};
-
 const downloadFile = async (shareId: string, fileId: string) => {
-  window.location.href = await getFileDownloadUrl(shareId, fileId);
+  window.location.href = `${window.location.origin}/api/shares/${shareId}/files/${fileId}`;
 };
 
 const uploadFile = async (