mirror of
https://github.com/infiniflow/ragflow.git
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3fe9d291fb
### Summary As title <img width="3165" height="2011" alt="image" src="https://github.com/user-attachments/assets/6947aa4f-5dfd-4d8c-b6af-82015b1f1537" /> --- <img width="3735" height="1721" alt="image" src="https://github.com/user-attachments/assets/3a7ec8e8-d5b9-4195-bba9-c435218f6142" />
126 lines
3.3 KiB
Go
126 lines
3.3 KiB
Go
//
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// Copyright 2026 The InfiniFlow Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//
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package io
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import (
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"bytes"
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"image"
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_ "image/png"
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"os"
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"os/exec"
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"path/filepath"
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"testing"
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)
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func TestWritePDF_UsesGoLibrary(t *testing.T) {
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requirePDFLatinFont(t)
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out, err := WritePDF("Hello\n中文", PDFOptions{})
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if err != nil {
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t.Fatalf("WritePDF: %v", err)
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}
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if !bytes.HasPrefix(out, []byte("%PDF-")) {
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t.Fatalf("PDF output missing magic header: %q", out[:min(len(out), 8)])
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}
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}
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func TestWritePDF_RendersVisibleText(t *testing.T) {
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requirePDFLatinFont(t)
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if _, err := exec.LookPath("pdftoppm"); err != nil {
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t.Skip("pdftoppm not available")
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}
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if _, err := exec.LookPath("pdftotext"); err != nil {
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t.Skip("pdftotext not available")
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}
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out, err := WritePDF("Visible PDF body", PDFOptions{
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HeaderText: "Visible Header",
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FooterText: "Visible Footer",
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AddPageNumbers: true,
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AddTimestamp: false,
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})
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if err != nil {
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t.Fatalf("WritePDF: %v", err)
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}
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dir := t.TempDir()
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pdfPath := filepath.Join(dir, "visible.pdf")
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if err := os.WriteFile(pdfPath, out, 0o600); err != nil {
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t.Fatalf("WriteFile pdf: %v", err)
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}
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prefix := filepath.Join(dir, "page")
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cmd := exec.Command("pdftoppm", "-png", "-singlefile", pdfPath, prefix)
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if output, err := cmd.CombinedOutput(); err != nil {
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t.Fatalf("pdftoppm: %v: %s", err, output)
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}
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pngFile, err := os.Open(prefix + ".png")
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if err != nil {
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t.Fatalf("Open png: %v", err)
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}
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defer pngFile.Close()
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img, _, err := image.Decode(pngFile)
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if err != nil {
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t.Fatalf("Decode png: %v", err)
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}
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bounds := img.Bounds()
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nonWhite := 0
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for y := bounds.Min.Y; y < bounds.Max.Y; y++ {
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for x := bounds.Min.X; x < bounds.Max.X; x++ {
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r, g, b, _ := img.At(x, y).RGBA()
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if r != 0xffff || g != 0xffff || b != 0xffff {
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nonWhite++
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}
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}
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}
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if nonWhite == 0 {
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t.Fatal("rendered PDF page is blank")
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}
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textOutput, err := exec.Command("pdftotext", pdfPath, "-").CombinedOutput()
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if err != nil {
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t.Fatalf("pdftotext: %v: %s", err, textOutput)
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}
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if !bytes.Contains(textOutput, []byte("Visible PDF body")) {
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t.Fatalf("pdftotext output = %q, want body text", textOutput)
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}
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}
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func TestResolvePDFLatinFontPathHonorsEnv(t *testing.T) {
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dir := t.TempDir()
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fontPath := filepath.Join(dir, "custom.ttf")
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if err := os.WriteFile(fontPath, []byte("placeholder"), 0o600); err != nil {
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t.Fatalf("WriteFile font: %v", err)
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}
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t.Setenv("RAGFLOW_PDF_LATIN_FONT_PATH", fontPath)
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if got := resolvePDFLatinFontPath(); got != fontPath {
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t.Fatalf("resolvePDFLatinFontPath() = %q, want %q", got, fontPath)
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}
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}
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func requirePDFLatinFont(t *testing.T) {
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t.Helper()
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if resolvePDFLatinFontPath() == "" {
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t.Skip("no local Latin PDF font available")
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}
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}
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func min(a, b int) int {
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if a < b {
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return a
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}
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return b
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}
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