之前介绍了利用libreoffice 将office文件转化pdf并处理中文乱码的问题 不清楚的同学点击这里 [使用LibreOffice将word转化为pdf -解决中文乱码](https://studygolang.com/articles/35059#reply0) 现在结合Golang 实现文件上传和并生成PDF链接地址
upload.html 上传页面
```html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Upload</title>
</head>
<body>
<h1>Office Transport to pdf</h1>
<form action="/upload" method="post" enctype="multipart/form-data">
<p><input type="file" name="file"></p>
<p><input type="submit" value="submit"></p>
</form>
</body>
</html>
```
upload处理
```golang
func Upload(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Access-Control-Allow-Origin", "*")
w.Header().Set("Access-Control-Allow-Methods", "POST,GET,OPTIONS,DELETE")
w.Header().Add("Access-Control-Allow-Headers", "Content-Type;x-requested-with") // header的类型
w.Header().Set("Content-Type", "application/json")
file, header, err := req.FormFile("file")
if err != nil {
data := map[string]interface{}{
"code": -1,
"message": "upload file error",
}
response(w, data)
return
}
year := time.Now().Year()
month := int(time.Now().Month())
day := time.Now().Day()
tempPath := fmt.Sprintf("./static/tmp/")
outPutPath := fmt.Sprintf("./static/pdf/%d/%d/%d", year, month, day)
checkPath(tempPath)
rand.Seed(time.Now().UnixNano())
randNum := rand.Intn(100)
fileName := fmt.Sprintf("%s-%d", time.Now().Format("20060102-15_04_05"), randNum)
suffix := []string{".xls", ".xlsx", ".doc", ".docx", ".ppt", ".pptx", ".pdf"}
fileType := ""
for _, v := range suffix {
if strings.HasSuffix(header.Filename, v) {
fileType = v
break
}
}
needExport := true
exportName := fileName
if fileType == "" {
data := map[string]interface{}{
"code": -1,
"message": "upload file type error",
}
response(w, data)
return
} else if fileType == ".pdf" {
fileName = outPutPath + "/" + fileName + fileType
needExport = false
} else {
fileName = tempPath + fileName + fileType
}
dst, err := os.Create(fileName)
defer dst.Close()
if err != nil {
log.Errorf("upload file error")
data := map[string]interface{}{
"code": -1,
"message": "upload file error",
}
response(w, data)
return
}
_, err = io.Copy(dst, file)
if err != nil {
log.Errorf("copy file error")
data := map[string]interface{}{
"code": -1,
"message": "copy file error",
}
response(w, data)
return
}
if needExport {
err := exportToPdf(fileName, outPutPath)
if err != nil {
log.Errorf("output file error")
data := map[string]interface{}{
"code": -1,
"message": "output file error",
}
response(w, data)
return
}
os.Remove(fileName) //删除上传文件
}
exportName = strings.TrimPrefix(outPutPath+"/"+exportName+".pdf", "./")
data := map[string]interface{}{
"code": 0,
"url": WebAgent.Host + "/" + exportName,
}
response(w, data)
return
}
```
checkPath 检查目录是否存在
```golang
//checkPath 检查目录是否存在并创建
func checkPath(path string) error {
_, err := os.Stat(path)
if err != nil && os.IsNotExist(err) {
err := os.MkdirAll(path, os.ModePerm)
if err != nil {
return err
}
}
return nil
}
```
golang 调用系统命令导出为pdf
```golang
func exportToPdf(filename string, outPath string) error {
checkPath(outPath)
lock.Lock()
defer lock.Unlock()
cmd := exec.Command("libreoffice7.0", "--invisible", "--language=zh-CN", "--convert-to", "pdf",
filename, "--outdir", outPath)
cmd.Stdout = os.Stdout
err := cmd.Run()
if err != nil {
log.Errorf("transport pdf err:%v", err)
return err
}
return nil
}
```
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