Fix profile render when the README.md size is larger than 1024 bytes (#25131)

Fixes https://github.com/go-gitea/gitea/issues/25094

`GetBlobContent` will only get the first 1024 bytes, if the README.md
size is larger than 1024 bytes,
We can not render the rest of them.
After this fix, we should provide the limited size to read when call
`GetBlobContent`.

After:

![image](https://github.com/go-gitea/gitea/assets/18380374/22a42936-4cf8-40b4-a5c7-e384082beb0d)

---------

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
yp05327 2023-06-13 18:02:25 +09:00 committed by GitHub
parent a583c56306
commit 22a39bb961
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
8 changed files with 116 additions and 12 deletions

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@ -920,7 +920,7 @@ func PullRequestCodeOwnersReview(ctx context.Context, pull *Issue, pr *PullReque
var data string var data string
for _, file := range files { for _, file := range files {
if blob, err := commit.GetBlobByPath(file); err == nil { if blob, err := commit.GetBlobByPath(file); err == nil {
data, err = blob.GetBlobContent() data, err = blob.GetBlobContent(setting.UI.MaxDisplayFileSize)
if err == nil { if err == nil {
break break
} }

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@ -20,17 +20,18 @@ func (b *Blob) Name() string {
return b.name return b.name
} }
// GetBlobContent Gets the content of the blob as raw text // GetBlobContent Gets the limited content of the blob as raw text
func (b *Blob) GetBlobContent() (string, error) { func (b *Blob) GetBlobContent(limit int64) (string, error) {
if limit <= 0 {
return "", nil
}
dataRc, err := b.DataAsync() dataRc, err := b.DataAsync()
if err != nil { if err != nil {
return "", err return "", err
} }
defer dataRc.Close() defer dataRc.Close()
buf := make([]byte, 1024) buf, err := util.ReadWithLimit(dataRc, int(limit))
n, _ := util.ReadAtMost(dataRc, buf) return string(buf), err
buf = buf[:n]
return string(buf), nil
} }
// GetBlobLineCount gets line count of the blob // GetBlobLineCount gets line count of the blob

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@ -4,13 +4,14 @@
package util package util
import ( import (
"bytes"
"errors" "errors"
"io" "io"
) )
// ReadAtMost reads at most len(buf) bytes from r into buf. // ReadAtMost reads at most len(buf) bytes from r into buf.
// It returns the number of bytes copied. n is only less than len(buf) if r provides fewer bytes. // It returns the number of bytes copied. n is only less than len(buf) if r provides fewer bytes.
// If EOF occurs while reading, err will be nil. // If EOF or ErrUnexpectedEOF occurs while reading, err will be nil.
func ReadAtMost(r io.Reader, buf []byte) (n int, err error) { func ReadAtMost(r io.Reader, buf []byte) (n int, err error) {
n, err = io.ReadFull(r, buf) n, err = io.ReadFull(r, buf)
if err == io.EOF || err == io.ErrUnexpectedEOF { if err == io.EOF || err == io.ErrUnexpectedEOF {
@ -19,6 +20,42 @@ func ReadAtMost(r io.Reader, buf []byte) (n int, err error) {
return n, err return n, err
} }
// ReadWithLimit reads at most "limit" bytes from r into buf.
// If EOF or ErrUnexpectedEOF occurs while reading, err will be nil.
func ReadWithLimit(r io.Reader, n int) (buf []byte, err error) {
return readWithLimit(r, 1024, n)
}
func readWithLimit(r io.Reader, batch, limit int) ([]byte, error) {
if limit <= batch {
buf := make([]byte, limit)
n, err := ReadAtMost(r, buf)
if err != nil {
return nil, err
}
return buf[:n], nil
}
res := bytes.NewBuffer(make([]byte, 0, batch))
bufFix := make([]byte, batch)
eof := false
for res.Len() < limit && !eof {
bufTmp := bufFix
if res.Len()+batch > limit {
bufTmp = bufFix[:limit-res.Len()]
}
n, err := io.ReadFull(r, bufTmp)
if err == io.EOF || err == io.ErrUnexpectedEOF {
eof = true
} else if err != nil {
return nil, err
}
if _, err = res.Write(bufTmp[:n]); err != nil {
return nil, err
}
}
return res.Bytes(), nil
}
// ErrNotEmpty is an error reported when there is a non-empty reader // ErrNotEmpty is an error reported when there is a non-empty reader
var ErrNotEmpty = errors.New("not-empty") var ErrNotEmpty = errors.New("not-empty")

66
modules/util/io_test.go Normal file
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@ -0,0 +1,66 @@
// Copyright 2023 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package util
import (
"bytes"
"errors"
"testing"
"github.com/stretchr/testify/assert"
)
type readerWithError struct {
buf *bytes.Buffer
}
func (r *readerWithError) Read(p []byte) (n int, err error) {
if r.buf.Len() < 2 {
return 0, errors.New("test error")
}
return r.buf.Read(p)
}
func TestReadWithLimit(t *testing.T) {
bs := []byte("0123456789abcdef")
// normal test
buf, err := readWithLimit(bytes.NewBuffer(bs), 5, 2)
assert.NoError(t, err)
assert.Equal(t, []byte("01"), buf)
buf, err = readWithLimit(bytes.NewBuffer(bs), 5, 5)
assert.NoError(t, err)
assert.Equal(t, []byte("01234"), buf)
buf, err = readWithLimit(bytes.NewBuffer(bs), 5, 6)
assert.NoError(t, err)
assert.Equal(t, []byte("012345"), buf)
buf, err = readWithLimit(bytes.NewBuffer(bs), 5, len(bs))
assert.NoError(t, err)
assert.Equal(t, []byte("0123456789abcdef"), buf)
buf, err = readWithLimit(bytes.NewBuffer(bs), 5, 100)
assert.NoError(t, err)
assert.Equal(t, []byte("0123456789abcdef"), buf)
// test with error
buf, err = readWithLimit(&readerWithError{bytes.NewBuffer(bs)}, 5, 10)
assert.NoError(t, err)
assert.Equal(t, []byte("0123456789"), buf)
buf, err = readWithLimit(&readerWithError{bytes.NewBuffer(bs)}, 5, 100)
assert.ErrorContains(t, err, "test error")
assert.Empty(t, buf)
// test public function
buf, err = ReadWithLimit(bytes.NewBuffer(bs), 2)
assert.NoError(t, err)
assert.Equal(t, []byte("01"), buf)
buf, err = ReadWithLimit(bytes.NewBuffer(bs), 9999999)
assert.NoError(t, err)
assert.Equal(t, []byte("0123456789abcdef"), buf)
}

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@ -363,7 +363,7 @@ func renderFile(ctx *context.Context, entry *git.TreeEntry, treeLink, rawLink st
ctx.Data["FileError"] = ctx.Locale.Tr("actions.runs.invalid_workflow_helper", workFlowErr.Error()) ctx.Data["FileError"] = ctx.Locale.Tr("actions.runs.invalid_workflow_helper", workFlowErr.Error())
} }
} else if util.SliceContains([]string{"CODEOWNERS", "docs/CODEOWNERS", ".gitea/CODEOWNERS"}, ctx.Repo.TreePath) { } else if util.SliceContains([]string{"CODEOWNERS", "docs/CODEOWNERS", ".gitea/CODEOWNERS"}, ctx.Repo.TreePath) {
if data, err := blob.GetBlobContent(); err == nil { if data, err := blob.GetBlobContent(setting.UI.MaxDisplayFileSize); err == nil {
_, warnings := issue_model.GetCodeOwnersFromContent(ctx, data) _, warnings := issue_model.GetCodeOwnersFromContent(ctx, data)
if len(warnings) > 0 { if len(warnings) > 0 {
ctx.Data["FileWarning"] = strings.Join(warnings, "\n") ctx.Data["FileWarning"] = strings.Join(warnings, "\n")

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@ -107,7 +107,7 @@ func Profile(ctx *context.Context) {
} }
blob, err := commit.GetBlobByPath("README.md") blob, err := commit.GetBlobByPath("README.md")
if err == nil { if err == nil {
bytes, err := blob.GetBlobContent() bytes, err := blob.GetBlobContent(setting.UI.MaxDisplayFileSize)
if err != nil { if err != nil {
ctx.ServerError("GetBlobContent", err) ctx.ServerError("GetBlobContent", err)
return return

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@ -203,7 +203,7 @@ func GetContents(ctx context.Context, repo *repo_model.Repository, treePath, ref
} else if entry.IsLink() { } else if entry.IsLink() {
contentsResponse.Type = string(ContentTypeLink) contentsResponse.Type = string(ContentTypeLink)
// The target of a symlink file is the content of the file // The target of a symlink file is the content of the file
targetFromContent, err := entry.Blob().GetBlobContent() targetFromContent, err := entry.Blob().GetBlobContent(1024)
if err != nil { if err != nil {
return nil, err return nil, err
} }

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@ -88,7 +88,7 @@ func testPackageCargo(t *testing.T, _ *neturl.URL) {
blob, err := commit.GetBlobByPath(path) blob, err := commit.GetBlobByPath(path)
assert.NoError(t, err) assert.NoError(t, err)
content, err := blob.GetBlobContent() content, err := blob.GetBlobContent(1024)
assert.NoError(t, err) assert.NoError(t, err)
return content return content