问题声明：我有一个烧瓶服务器托管在 pythonanywhere.com 中。我的网站所做的是，用户从我的网站上传zip文件（apk，ipa压缩），Flask将其下载，然后将其上传到对象存储。现在，无需分块zip文件（通常为60-70 mb），上传只需3-4分钟。经过一番搜索，我开始了解分块。对于前端部分，我正在使用javascript库进行分块：
<form method="POST" enctype=multipart/form-data id="dropper">
<label for="file"><span style="font-size: 20px">Enter package (ex: Sconnect_iOS_test_1_0_6.zip)</span></label>
<input type=file name=file id="file" required onchange="checkName()">
<script type="application/javascript">
Dropzone.options.dropper = {
paramName: 'file',
chunking: true,
forceChunking: true,
url: '/upload',
maxFilesize: 1025, // megabytes
chunkSize: 1000000 // bytes
}
</script>
因为我不想将文件永久存储在 pythonanywhere.com 服务器中，所以我不想使用
with open(save_path, 'ab') as f:
f.seek(int(request.form['dzchunkbyteoffset']))
f.write(file.stream.read())
所以，我尝试使用tempfile。但是尝试之后，服务器似乎对我很生气：（
<body><h1>Bad Request</h1>
<p>The browser (or proxy) sent a request that this server could not understand.</p>
</body>
如何完成此任务。还需要注意的是，为了存储对象，对象存储供应商提供了python API进行分块和上传，但是对于下载部分，我却迷茫了。
这是我的代码：
fd, path = tempfile.mkstemp()
if request.form['btn'] == 'Upload' and g.user:
if 'file' not in request.files:
flash('No file part')
return show_notification("oops, No file part")
file = request.files['file']
# assembling chunks ---------------------------------------->>>
current_chunk = int(request.form['dzchunkindex'])
# If the file already exists it's ok if we are appending to it,
# but not if it's new file that would overwrite the existing one
if os.path.exists(path) and current_chunk == 0:
# 400 and 500s will tell dropzone that an error occurred and show an error
return make_response(('File already exists', 400))
try:
with os.fdopen(fd, 'wb') as f:
f.seek(int(request.form['dzchunkbyteoffset']))
f.write(file.stream.read())
except OSError:
return make_response(("Not sure why,"
" but we couldn't write the file to disk", 500))
total_chunks = int(request.form['dztotalchunkcount'])
if current_chunk + 1 == total_chunks:
# This was the last chunk, the file should be complete and the size we expect
if os.path.getsize(save_path) != int(request.form['dztotalfilesize']):
return make_response(('Size mismatch', 500))
else:
with os.fdopen(fd, 'rb') as fb:
fb.seek(0, os.SEEK_END)
size = fb.tell()
# seek to its beginning, so you might save it entirely
fb.seek(0)
# if user does not select file, browser also
# submit an empty part without filename
if file.filename == '':
flash('No selected file')
return show_notification("oops, No file selected!")
if file and allowed_file(file.filename):
filename = secure_filename(file.filename)
#print(filename, [temp[1] for temp in file_exist])
if filename in [temp[1] for temp in file_exist]:
return show_notification("oops, file name already exists!")
elif request.form['version'] in [temp[2] for temp in file_exist]:
return show_notification("oops, version already exists!")
elif request.form['version'].strip() == '':
return show_notification("oops, version should not be empty!")
else:
try:
multi_part_upload_manual("bucketname", filename, fb, size)
os.remove(path)
try:
timestamp = datetime.now().strftime('%Y-%m-%d %H:%M:%S')
cur.execute("some sql command")
name = cur.fetchall()[0][0]
cur.execute("some sql command")
mysql.connection.commit()
return show_notification('Upload successful!!')
except Exception as e:
print(e)
return show_notification('Upload unsuccessful!!<br>'+str(e))
except Exception as e:
return show_notification('Upload unsuccessful!!<br>'+str(e))
os.remove(path)
os.remove(path)
return show_notification('oops, unsupported file format!')
else:
print('Chunk {} of {} for file {}complete'.format(current_chunk1,total_chunks,file.filename))
return make_response(("Chunk upload successful", 200))
#assembling chunks ----------------------------------->>>
请帮助我，如何解决它，否则，我必须求助于不要分块上传：（