结合 requestHandler 和 BlobstoreUploadHandler 的 Python GAE 问题

Question

<form action="/fileupload" enctype="multipart/form-data" method="post">
  <label>Title<input name="name"></label>
  <label>Author<input name="author"></label>
  <label>Year <input name="year"></label>
  <label>Link <input name="link"></label>
  <input type="file" name="file">
  <input type="submit">
</form>

问题是为什么 self.get_uploads() 在 self.request.get('file') 工作时(或者我建议它工作)什么都不返回

class FileUploadHandler(H.Handler,blobstore_handlers.BlobstoreUploadHandler):
def post(self):
    name=self.request.get('name')
    if name:
        logging.error(name)
    author=self.request.get('author')
    if author:
        logging.error(author)
    year  =self.request.get('year')
    if year and year.isdigit():
        year=int(year)
    f  =self.get_uploads('file')#FILE NOT FOUND
    #f=self.request.get('file') # WORKS FINE

    if not f:
        logging.error("FILE NOT FOUND")
    self.redirect("/files")

我查看了 sample app但他们也使用 self.request.get('file')

答案是您应该为 blob 创建上传 url。

Answer 1

您需要 get_uploads()[0] 或名称。

上传处理程序的简单示例(比较并在您的代码中进行适当的更改):

  <form name="myform" action="{{ upload_url }}" method="post" enctype="multipart/form-data">
            <h1>Select an Image</h1>
            <input name="file" type="file"><br>
            <input type="submit" value="Upload">
  </form>

处理程序:

class UploadBlobsHandler(blobstore_handlers.BlobstoreUploadHandler):

    def post(self):
        try:
            upload = self.get_uploads()[0]
            logging.info(upload)
            url = images.get_serving_url(upload)
            # Do something with it.
        except:
            self.redirect('/uploadform/?error', abort=True)

        self.redirect('/uploadform/?success&image_url=' + url)

关于如何使用 blobstorrhandlers 上传的示例:gae-image-upload-example