Python Google App Engine-多部分表單輸入Blobstore和Datastore

Question

我一直在遍歷GAE Python Blobstore的Google文檔：

https://developers.google.com/appengine/docs/python/blobstore/

還有一些相同的問題

Google App Engine（Python）-上傳文件（圖片）

HTML表單通過應用引擎提交數據存儲區實體和Blob存儲區

如何在Python App Engine中使用BlobStore上傳文件？

但是我無法使文件上載和輸入字段以單一格式通過所有形式進行處理（下面的代碼和錯誤），並且它也沒有進入Blobstore。

newpost.html

<form method="post" action="/upload" role="form" enctype="multipart/form-data">
  <div class="col-xs-6">
   <div class="form-group">
    <label for="title"><h2><small>Enter Title of this Post</small></h2>
    <input type="text" name="subject" value="{{ subject }}" class="form-control">
    </label>
   </div>
  </div>
   <div class="pull-right">

  <div class="form-group">
   <label for="exampleInputFile">File upload (Optional)</label>
     <input type="file" id="uploadFile" name="uploadFile">
   <p class="help-block">
   You are responsible for copyrighted or inappropriate files that you upload.</p>
  </div>

<hr><hr>
    <img src="../img/powered_by.png" width="200" alt="logo" class="img-rounded">
   </div>
   <div class="col-xs-6">
     <label for="art"><h2><small>Enter Post</small></h2></label>
      <div class="input-group">
        <textarea name="content" class="form-control input-lg">{{ content }}</textarea>
        <span class="input-group-addon input-group-btn">
        <button type="submit" class="btn btn-danger btn-lg">Submit</button>
        </span>
      </div>
     <div style="color:red">{{ error }}</div>
   </div>
</form>

weblog.py

class PixHandler(webapp2.RequestHandler):
  def get(self):
    upload_url = blobstore.create_upload_url('/upload')
##    self.response.out.write('<html><body>')
##    self.response.out.write('<form action="%s" method="POST" enctype="multipart/form-data">' % upload_url)
##    self.response.out.write("""Upload File: <input type="file" name="file"><br> <input type="submit"
##        name="submit" value="Submit"> </form></body></html>""")

class UploadHandler(blobstore_handlers.BlobstoreUploadHandler):
  def post(self):
    upload_files = self.get_uploads('uploadFile')  # from upload field in the form
    blob_info = upload_files[0]
    tag = '/pic/%s' % blob_info.key()
    servePic = BlogPosts(imageTag = tag) # BlobStore entry

    subject = self.request.get("subject")
    content = self.request.get("content")
    query = self.request.get("rname")
    if (query):
        self.render_query()
    elif subject and content:
        msg = "Looks good"
        entry = BlogPosts(subject = subject, content = content)
        entry_key = entry.put()
        permalink = entry_key.id()
        self.redirect("./%s" % str(permalink))
    elif (not subject and not content):
        msg = "Neither box can be empty"
        self.render_html(subject, content, msg)

    self.redirect(tag) # serves pix with unique id in url

class ServeHandler(blobstore_handlers.BlobstoreDownloadHandler):
  def get(self, resource):
    resource = str(urllib.unquote(resource))
    blob_info = blobstore.BlobInfo.get(resource)
    self.send_blob(blob_info)

HTTP錯誤：

File "C:\Python27\udacity-web-app-rs-1\weblog.py", line 101, in post
    blob_info = upload_files[0]
IndexError: list index out of range

它沒有到達重定向頁面（進入HTTP錯誤頁面）。 另外， image key()並未進入我為其設置的數據存儲區值

使用UploadHandler從表單到/upload進行UploadHandler 。

編輯：

我意識到一些代碼與這些問題無關。 沒有改變問題。

Answer 1

您需要使用從create_upload_url獲得的值作為表單的action 。 Appengine將為您保存保存Blob，然后它將使用blobinfo和其余表單參數向您的/ upload URL發送請求。

Python Google App Engine-多部分表單輸入Blobstore和Datastore

問題描述

1 個解決方案

解決方案1
1 2014-03-07 22:12:07

Python Google App Engine-多部分表單輸入Blobstore和Datastore

問題描述

1 個解決方案

解決方案1 1 2014-03-07 22:12:07

解決方案1
1 2014-03-07 22:12:07