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forgejo/routers/api/v1/repo/wiki.go
Gergely Nagy 67fa52dedb
feat(quota): Quota enforcement
The previous commit laid out the foundation of the quota engine, this
one builds on top of it, and implements the actual enforcement.

Enforcement happens at the route decoration level, whenever possible. In
case of the API, when over quota, a 413 error is returned, with an
appropriate JSON payload. In case of web routes, a 413 HTML page is
rendered with similar information.

This implementation is for a **soft quota**: quota usage is checked
before an operation is to be performed, and the operation is *only*
denied if the user is already over quota. This makes it possible to go
over quota, but has the significant advantage of being practically
implementable within the current Forgejo architecture.

The goal of enforcement is to deny actions that can make the user go
over quota, and allow the rest. As such, deleting things should - in
almost all cases - be possible. A prime exemption is deleting files via
the web ui: that creates a new commit, which in turn increases repo
size, thus, is denied if the user is over quota.

Limitations
-----------

Because we generally work at a route decorator level, and rarely
look *into* the operation itself, `size:repos:public` and
`size:repos:private` are not enforced at this level, the engine enforces
against `size:repos:all`. This will be improved in the future.

AGit does not play very well with this system, because AGit PRs count
toward the repo they're opened against, while in the GitHub-style fork +
pull model, it counts against the fork. This too, can be improved in the
future.

There's very little done on the UI side to guard against going over
quota. What this patch implements, is enforcement, not prevention. The
UI will still let you *try* operations that *will* result in a denial.

Signed-off-by: Gergely Nagy <forgejo@gergo.csillger.hu>
2024-08-02 11:10:34 +02:00

536 lines
14 KiB
Go

// Copyright 2021 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package repo
import (
"encoding/base64"
"fmt"
"net/http"
"net/url"
repo_model "code.gitea.io/gitea/models/repo"
"code.gitea.io/gitea/modules/git"
"code.gitea.io/gitea/modules/gitrepo"
"code.gitea.io/gitea/modules/setting"
api "code.gitea.io/gitea/modules/structs"
"code.gitea.io/gitea/modules/util"
"code.gitea.io/gitea/modules/web"
"code.gitea.io/gitea/services/context"
"code.gitea.io/gitea/services/convert"
notify_service "code.gitea.io/gitea/services/notify"
wiki_service "code.gitea.io/gitea/services/wiki"
)
// NewWikiPage response for wiki create request
func NewWikiPage(ctx *context.APIContext) {
// swagger:operation POST /repos/{owner}/{repo}/wiki/new repository repoCreateWikiPage
// ---
// summary: Create a wiki page
// consumes:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: body
// in: body
// schema:
// "$ref": "#/definitions/CreateWikiPageOptions"
// responses:
// "201":
// "$ref": "#/responses/WikiPage"
// "400":
// "$ref": "#/responses/error"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
// "413":
// "$ref": "#/responses/quotaExceeded"
// "423":
// "$ref": "#/responses/repoArchivedError"
form := web.GetForm(ctx).(*api.CreateWikiPageOptions)
if util.IsEmptyString(form.Title) {
ctx.Error(http.StatusBadRequest, "emptyTitle", nil)
return
}
wikiName := wiki_service.UserTitleToWebPath("", form.Title)
if len(form.Message) == 0 {
form.Message = fmt.Sprintf("Add %q", form.Title)
}
content, err := base64.StdEncoding.DecodeString(form.ContentBase64)
if err != nil {
ctx.Error(http.StatusBadRequest, "invalid base64 encoding of content", err)
return
}
form.ContentBase64 = string(content)
if err := wiki_service.AddWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, wikiName, form.ContentBase64, form.Message); err != nil {
if repo_model.IsErrWikiReservedName(err) {
ctx.Error(http.StatusBadRequest, "IsErrWikiReservedName", err)
} else if repo_model.IsErrWikiAlreadyExist(err) {
ctx.Error(http.StatusBadRequest, "IsErrWikiAlreadyExists", err)
} else {
ctx.Error(http.StatusInternalServerError, "AddWikiPage", err)
}
return
}
wikiPage := getWikiPage(ctx, wikiName)
if !ctx.Written() {
notify_service.NewWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, string(wikiName), form.Message)
ctx.JSON(http.StatusCreated, wikiPage)
}
}
// EditWikiPage response for wiki modify request
func EditWikiPage(ctx *context.APIContext) {
// swagger:operation PATCH /repos/{owner}/{repo}/wiki/page/{pageName} repository repoEditWikiPage
// ---
// summary: Edit a wiki page
// consumes:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: pageName
// in: path
// description: name of the page
// type: string
// required: true
// - name: body
// in: body
// schema:
// "$ref": "#/definitions/CreateWikiPageOptions"
// responses:
// "200":
// "$ref": "#/responses/WikiPage"
// "400":
// "$ref": "#/responses/error"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
// "413":
// "$ref": "#/responses/quotaExceeded"
// "423":
// "$ref": "#/responses/repoArchivedError"
form := web.GetForm(ctx).(*api.CreateWikiPageOptions)
oldWikiName := wiki_service.WebPathFromRequest(ctx.PathParamRaw(":pageName"))
newWikiName := wiki_service.UserTitleToWebPath("", form.Title)
if len(newWikiName) == 0 {
newWikiName = oldWikiName
}
if len(form.Message) == 0 {
form.Message = fmt.Sprintf("Update %q", newWikiName)
}
content, err := base64.StdEncoding.DecodeString(form.ContentBase64)
if err != nil {
ctx.Error(http.StatusBadRequest, "invalid base64 encoding of content", err)
return
}
form.ContentBase64 = string(content)
if err := wiki_service.EditWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, oldWikiName, newWikiName, form.ContentBase64, form.Message); err != nil {
ctx.Error(http.StatusInternalServerError, "EditWikiPage", err)
return
}
wikiPage := getWikiPage(ctx, newWikiName)
if !ctx.Written() {
notify_service.EditWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, string(newWikiName), form.Message)
ctx.JSON(http.StatusOK, wikiPage)
}
}
func getWikiPage(ctx *context.APIContext, wikiName wiki_service.WebPath) *api.WikiPage {
wikiRepo, commit := findWikiRepoCommit(ctx)
if wikiRepo != nil {
defer wikiRepo.Close()
}
if ctx.Written() {
return nil
}
// lookup filename in wiki - get filecontent, real filename
content, pageFilename := wikiContentsByName(ctx, commit, wikiName, false)
if ctx.Written() {
return nil
}
sidebarContent, _ := wikiContentsByName(ctx, commit, "_Sidebar", true)
if ctx.Written() {
return nil
}
footerContent, _ := wikiContentsByName(ctx, commit, "_Footer", true)
if ctx.Written() {
return nil
}
// get commit count - wiki revisions
commitsCount, _ := wikiRepo.FileCommitsCount(ctx.Repo.Repository.GetWikiBranchName(), pageFilename)
// Get last change information.
lastCommit, err := wikiRepo.GetCommitByPath(pageFilename)
if err != nil {
ctx.Error(http.StatusInternalServerError, "GetCommitByPath", err)
return nil
}
return &api.WikiPage{
WikiPageMetaData: wiki_service.ToWikiPageMetaData(wikiName, lastCommit, ctx.Repo.Repository),
ContentBase64: content,
CommitCount: commitsCount,
Sidebar: sidebarContent,
Footer: footerContent,
}
}
// DeleteWikiPage delete wiki page
func DeleteWikiPage(ctx *context.APIContext) {
// swagger:operation DELETE /repos/{owner}/{repo}/wiki/page/{pageName} repository repoDeleteWikiPage
// ---
// summary: Delete a wiki page
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: pageName
// in: path
// description: name of the page
// type: string
// required: true
// responses:
// "204":
// "$ref": "#/responses/empty"
// "403":
// "$ref": "#/responses/forbidden"
// "404":
// "$ref": "#/responses/notFound"
// "423":
// "$ref": "#/responses/repoArchivedError"
wikiName := wiki_service.WebPathFromRequest(ctx.PathParamRaw(":pageName"))
if err := wiki_service.DeleteWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, wikiName); err != nil {
if err.Error() == "file does not exist" {
ctx.NotFound(err)
return
}
ctx.Error(http.StatusInternalServerError, "DeleteWikiPage", err)
return
}
notify_service.DeleteWikiPage(ctx, ctx.Doer, ctx.Repo.Repository, string(wikiName))
ctx.Status(http.StatusNoContent)
}
// ListWikiPages get wiki pages list
func ListWikiPages(ctx *context.APIContext) {
// swagger:operation GET /repos/{owner}/{repo}/wiki/pages repository repoGetWikiPages
// ---
// summary: Get all wiki pages
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: page
// in: query
// description: page number of results to return (1-based)
// type: integer
// - name: limit
// in: query
// description: page size of results
// type: integer
// responses:
// "200":
// "$ref": "#/responses/WikiPageList"
// "404":
// "$ref": "#/responses/notFound"
wikiRepo, commit := findWikiRepoCommit(ctx)
if wikiRepo != nil {
defer wikiRepo.Close()
}
if ctx.Written() {
return
}
page := ctx.FormInt("page")
if page <= 1 {
page = 1
}
limit := ctx.FormInt("limit")
if limit <= 1 {
limit = setting.API.DefaultPagingNum
}
skip := (page - 1) * limit
max := page * limit
entries, err := commit.ListEntries()
if err != nil {
ctx.ServerError("ListEntries", err)
return
}
pages := make([]*api.WikiPageMetaData, 0, len(entries))
for i, entry := range entries {
if i < skip || i >= max || !entry.IsRegular() {
continue
}
c, err := wikiRepo.GetCommitByPath(entry.Name())
if err != nil {
ctx.Error(http.StatusInternalServerError, "GetCommit", err)
return
}
wikiName, err := wiki_service.GitPathToWebPath(entry.Name())
if err != nil {
if repo_model.IsErrWikiInvalidFileName(err) {
continue
}
ctx.Error(http.StatusInternalServerError, "WikiFilenameToName", err)
return
}
pages = append(pages, wiki_service.ToWikiPageMetaData(wikiName, c, ctx.Repo.Repository))
}
ctx.SetTotalCountHeader(int64(len(entries)))
ctx.JSON(http.StatusOK, pages)
}
// GetWikiPage get single wiki page
func GetWikiPage(ctx *context.APIContext) {
// swagger:operation GET /repos/{owner}/{repo}/wiki/page/{pageName} repository repoGetWikiPage
// ---
// summary: Get a wiki page
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: pageName
// in: path
// description: name of the page
// type: string
// required: true
// responses:
// "200":
// "$ref": "#/responses/WikiPage"
// "404":
// "$ref": "#/responses/notFound"
// get requested pagename
pageName := wiki_service.WebPathFromRequest(ctx.PathParamRaw(":pageName"))
wikiPage := getWikiPage(ctx, pageName)
if !ctx.Written() {
ctx.JSON(http.StatusOK, wikiPage)
}
}
// ListPageRevisions renders file revision list of wiki page
func ListPageRevisions(ctx *context.APIContext) {
// swagger:operation GET /repos/{owner}/{repo}/wiki/revisions/{pageName} repository repoGetWikiPageRevisions
// ---
// summary: Get revisions of a wiki page
// produces:
// - application/json
// parameters:
// - name: owner
// in: path
// description: owner of the repo
// type: string
// required: true
// - name: repo
// in: path
// description: name of the repo
// type: string
// required: true
// - name: pageName
// in: path
// description: name of the page
// type: string
// required: true
// - name: page
// in: query
// description: page number of results to return (1-based)
// type: integer
// responses:
// "200":
// "$ref": "#/responses/WikiCommitList"
// "404":
// "$ref": "#/responses/notFound"
wikiRepo, commit := findWikiRepoCommit(ctx)
if wikiRepo != nil {
defer wikiRepo.Close()
}
if ctx.Written() {
return
}
// get requested pagename
pageName := wiki_service.WebPathFromRequest(ctx.PathParamRaw(":pageName"))
if len(pageName) == 0 {
pageName = "Home"
}
// lookup filename in wiki - get filecontent, gitTree entry , real filename
_, pageFilename := wikiContentsByName(ctx, commit, pageName, false)
if ctx.Written() {
return
}
// get commit count - wiki revisions
commitsCount, _ := wikiRepo.FileCommitsCount(ctx.Repo.Repository.GetWikiBranchName(), pageFilename)
page := ctx.FormInt("page")
if page <= 1 {
page = 1
}
// get Commit Count
commitsHistory, err := wikiRepo.CommitsByFileAndRange(
git.CommitsByFileAndRangeOptions{
Revision: ctx.Repo.Repository.GetWikiBranchName(),
File: pageFilename,
Page: page,
})
if err != nil {
ctx.Error(http.StatusInternalServerError, "CommitsByFileAndRange", err)
return
}
ctx.SetTotalCountHeader(commitsCount)
ctx.JSON(http.StatusOK, convert.ToWikiCommitList(commitsHistory, commitsCount))
}
// findEntryForFile finds the tree entry for a target filepath.
func findEntryForFile(commit *git.Commit, target string) (*git.TreeEntry, error) {
entry, err := commit.GetTreeEntryByPath(target)
if err != nil {
return nil, err
}
if entry != nil {
return entry, nil
}
// Then the unescaped, shortest alternative
var unescapedTarget string
if unescapedTarget, err = url.QueryUnescape(target); err != nil {
return nil, err
}
return commit.GetTreeEntryByPath(unescapedTarget)
}
// findWikiRepoCommit opens the wiki repo and returns the latest commit, writing to context on error.
// The caller is responsible for closing the returned repo again
func findWikiRepoCommit(ctx *context.APIContext) (*git.Repository, *git.Commit) {
wikiRepo, err := gitrepo.OpenWikiRepository(ctx, ctx.Repo.Repository)
if err != nil {
if git.IsErrNotExist(err) || err.Error() == "no such file or directory" {
ctx.NotFound(err)
} else {
ctx.Error(http.StatusInternalServerError, "OpenRepository", err)
}
return nil, nil
}
commit, err := wikiRepo.GetBranchCommit(ctx.Repo.Repository.GetWikiBranchName())
if err != nil {
if git.IsErrNotExist(err) {
ctx.NotFound(err)
} else {
ctx.Error(http.StatusInternalServerError, "GetBranchCommit", err)
}
return wikiRepo, nil
}
return wikiRepo, commit
}
// wikiContentsByEntry returns the contents of the wiki page referenced by the
// given tree entry, encoded with base64. Writes to ctx if an error occurs.
func wikiContentsByEntry(ctx *context.APIContext, entry *git.TreeEntry) string {
blob := entry.Blob()
if blob.Size() > setting.API.DefaultMaxBlobSize {
return ""
}
content, err := blob.GetBlobContentBase64()
if err != nil {
ctx.Error(http.StatusInternalServerError, "GetBlobContentBase64", err)
return ""
}
return content
}
// wikiContentsByName returns the contents of a wiki page, along with a boolean
// indicating whether the page exists. Writes to ctx if an error occurs.
func wikiContentsByName(ctx *context.APIContext, commit *git.Commit, wikiName wiki_service.WebPath, isSidebarOrFooter bool) (string, string) {
gitFilename := wiki_service.WebPathToGitPath(wikiName)
entry, err := findEntryForFile(commit, gitFilename)
if err != nil {
if git.IsErrNotExist(err) {
if !isSidebarOrFooter {
ctx.NotFound()
}
} else {
ctx.ServerError("findEntryForFile", err)
}
return "", ""
}
return wikiContentsByEntry(ctx, entry), gitFilename
}