初始提交: Gitea 项目代码
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package upload
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import (
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"mime"
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"net/http"
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"net/url"
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"path"
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"regexp"
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"strings"
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repo_model "gitea.dev/models/repo"
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"gitea.dev/modules/log"
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"gitea.dev/modules/reqctx"
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"gitea.dev/modules/setting"
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"gitea.dev/services/context"
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)
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// ErrFileTypeForbidden not allowed file type error
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type ErrFileTypeForbidden struct {
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Type string
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}
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// IsErrFileTypeForbidden checks if an error is a ErrFileTypeForbidden.
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func IsErrFileTypeForbidden(err error) bool {
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_, ok := err.(ErrFileTypeForbidden)
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return ok
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}
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func (err ErrFileTypeForbidden) Error() string {
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return "This file cannot be uploaded or modified due to a forbidden file extension or type."
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}
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var wildcardTypeRe = regexp.MustCompile(`^[a-z]+/\*$`)
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// Verify validates whether a file is allowed to be uploaded. If buf is empty, it will just check if the file
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// has an allowed file extension.
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func Verify(buf []byte, fileName, allowedTypesStr string) error {
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allowedTypesStr = strings.ReplaceAll(allowedTypesStr, "|", ",") // compat for old config format
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allowedTypes := []string{}
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for entry := range strings.SplitSeq(allowedTypesStr, ",") {
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entry = strings.ToLower(strings.TrimSpace(entry))
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if entry != "" {
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allowedTypes = append(allowedTypes, entry)
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}
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}
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if len(allowedTypes) == 0 {
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return nil // everything is allowed
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}
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fullMimeType := http.DetectContentType(buf)
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mimeType, _, err := mime.ParseMediaType(fullMimeType)
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if err != nil {
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log.Warn("Detected attachment type could not be parsed %s", fullMimeType)
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return ErrFileTypeForbidden{Type: fullMimeType}
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}
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extension := strings.ToLower(path.Ext(fileName))
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isBufEmpty := len(buf) <= 1
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// https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/file#Unique_file_type_specifiers
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for _, allowEntry := range allowedTypes {
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if allowEntry == "*/*" {
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return nil // everything allowed
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}
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if strings.HasPrefix(allowEntry, ".") && allowEntry == extension {
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return nil // extension is allowed
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}
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if isBufEmpty {
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continue // skip mime type checks if buffer is empty
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}
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if mimeType == allowEntry {
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return nil // mime type is allowed
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}
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if wildcardTypeRe.MatchString(allowEntry) && strings.HasPrefix(mimeType, allowEntry[:len(allowEntry)-1]) {
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return nil // wildcard match, e.g. image/*
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}
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}
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if !isBufEmpty {
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log.Info("Attachment with type %s blocked from upload", fullMimeType)
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}
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return ErrFileTypeForbidden{Type: fullMimeType}
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}
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// AddUploadContext renders template values for dropzone
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func AddUploadContext(ctx *context.Context, uploadType string) {
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switch uploadType {
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case "release":
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ctx.Data["UploadUrl"] = ctx.Repo.RepoLink + "/releases/attachments"
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ctx.Data["UploadRemoveUrl"] = ctx.Repo.RepoLink + "/releases/attachments/remove"
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ctx.Data["UploadLinkUrl"] = ctx.Repo.RepoLink + "/releases/attachments"
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ctx.Data["UploadAccepts"] = strings.ReplaceAll(setting.Repository.Release.AllowedTypes, "|", ",")
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ctx.Data["UploadMaxFiles"] = setting.Repository.Release.MaxFiles
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ctx.Data["UploadMaxSize"] = setting.Repository.Release.FileMaxSize
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case "comment":
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ctx.Data["UploadUrl"] = ctx.Repo.RepoLink + "/issues/attachments"
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ctx.Data["UploadRemoveUrl"] = ctx.Repo.RepoLink + "/issues/attachments/remove"
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if len(ctx.PathParam("index")) > 0 {
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ctx.Data["UploadLinkUrl"] = ctx.Repo.RepoLink + "/issues/" + url.PathEscape(ctx.PathParam("index")) + "/attachments"
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} else {
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ctx.Data["UploadLinkUrl"] = ctx.Repo.RepoLink + "/issues/attachments"
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}
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ctx.Data["UploadAccepts"] = strings.ReplaceAll(setting.Attachment.AllowedTypes, "|", ",")
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ctx.Data["UploadMaxFiles"] = setting.Attachment.MaxFiles
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ctx.Data["UploadMaxSize"] = setting.Attachment.MaxSize
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default:
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setting.PanicInDevOrTesting("Invalid upload type: %s", uploadType)
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}
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}
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func AddUploadContextForRepo(ctx reqctx.RequestContext, repo *repo_model.Repository) {
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ctxData, repoLink := ctx.GetData(), repo.Link()
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ctxData["UploadUrl"] = repoLink + "/upload-file"
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ctxData["UploadRemoveUrl"] = repoLink + "/upload-remove"
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ctxData["UploadLinkUrl"] = repoLink + "/upload-file"
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ctxData["UploadAccepts"] = strings.ReplaceAll(setting.Repository.Upload.AllowedTypes, "|", ",")
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ctxData["UploadMaxFiles"] = setting.Repository.Upload.MaxFiles
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ctxData["UploadMaxSize"] = setting.Repository.Upload.FileMaxSize
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}
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@@ -0,0 +1,194 @@
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// Copyright 2019 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package upload
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import (
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"bytes"
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"compress/gzip"
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"testing"
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"github.com/stretchr/testify/assert"
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)
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func TestUpload(t *testing.T) {
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testContent := []byte(`This is a plain text file.`)
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var b bytes.Buffer
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w := gzip.NewWriter(&b)
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w.Write(testContent)
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w.Close()
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kases := []struct {
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data []byte
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fileName string
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allowedTypes string
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err error
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}{
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "",
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err: nil,
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},
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{
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data: testContent,
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fileName: "dir/test.txt",
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allowedTypes: "",
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err: nil,
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},
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{
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data: testContent,
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fileName: "../../../test.txt",
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allowedTypes: "",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: ",",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "|",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "*/*",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "*/*,",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "*/*|",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "text/plain",
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err: nil,
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},
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{
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data: testContent,
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fileName: "dir/test.txt",
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allowedTypes: "text/plain",
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err: nil,
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},
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{
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data: testContent,
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fileName: "/dir.txt/test.js",
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allowedTypes: ".js",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: " text/plain ",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: ".txt",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: " .txt,.js",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: " .txt|.js",
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err: nil,
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},
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{
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data: testContent,
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fileName: "../../test.txt",
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allowedTypes: " .txt|.js",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: " .txt ,.js ",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "text/plain, .txt",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "text/*",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "text/*,.js",
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err: nil,
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "text/**",
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err: ErrFileTypeForbidden{"text/plain; charset=utf-8"},
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: "application/x-gzip",
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err: ErrFileTypeForbidden{"text/plain; charset=utf-8"},
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: ".zip",
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err: ErrFileTypeForbidden{"text/plain; charset=utf-8"},
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: ".zip,.txtx",
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err: ErrFileTypeForbidden{"text/plain; charset=utf-8"},
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},
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{
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data: testContent,
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fileName: "test.txt",
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allowedTypes: ".zip|.txtx",
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err: ErrFileTypeForbidden{"text/plain; charset=utf-8"},
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},
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{
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data: b.Bytes(),
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fileName: "test.txt",
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allowedTypes: "application/x-gzip",
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err: nil,
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},
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}
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for _, kase := range kases {
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assert.Equal(t, kase.err, Verify(kase.data, kase.fileName, kase.allowedTypes))
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}
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}
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