我正在尝试使用Wagtail应用程序中的内置wagtaildocs应用程序上传文件。我已经用Nginx的Digital Ocean教程方法设置了我的Ubuntu 16.04服务器。独角兽| Postgres
一些初步澄清：
foo <- function(d, per, ...){ ## Add a new argument called `extract`
out <- data.frame(d, ...)
h <- split(out, rep(seq_along(per), per)) ## `extract` should subset from `h`
return(h)
}
# Example of use:
foo(d = 2:4, per = 1:2, age = 1:3, prof = c("med", "low", "med"))
10000M； client_max_body_size MAX_UPLOAD_SIZE = "5242880000"
WAGTAILIMAGES_MAX_UPLOAD_SIZE = 5000 * 1024 * 1024 从我的配置角度来看，除非我的文件大小低于10Gb，否则我应该没事，除非我遗漏了某些东西或对错字视而不见。
我已经尝试过将所有配置值调整为不合理的大值。我尝试使用其他文件扩展名，但不会更改我的错误。
我认为这与会话期间关闭TCP或SSL连接有关。我以前从未遇到过此问题，因此希望获得一些帮助。
这是我的错误消息：
.zip这是我的设置
Internal Server Error: /admin/documents/multiple/add/
Traceback (most recent call last):
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
psycopg2.DatabaseError: SSL SYSCALL error: Operation timed out
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
response = get_response(request)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/views/decorators/cache.py", line 44, in _wrapped_view_func
response = view_func(request, *args, **kwargs)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/wagtail/admin/urls/__init__.py", line 102, in wrapper
return view_func(request, *args, **kwargs)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/wagtail/admin/decorators.py", line 34, in decorated_view
return view_func(request, *args, **kwargs)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/wagtail/admin/utils.py", line 151, in wrapped_view_func
return view_func(request, *args, **kwargs)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/views/decorators/vary.py", line 20, in inner_func
response = func(*args, **kwargs)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/wagtail/documents/views/multiple.py", line 60, in add
doc.save()
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/models/base.py", line 741, in save
force_update=force_update, update_fields=update_fields)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/models/base.py", line 779, in save_base
force_update, using, update_fields,
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/models/base.py", line 870, in _save_table
result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/models/base.py", line 908, in _do_insert
using=using, raw=raw)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/models/manager.py", line 82, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/models/query.py", line 1186, in _insert
return query.get_compiler(using=using).execute_sql(return_id)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/models/sql/compiler.py", line 1335, in execute_sql
cursor.execute(sql, params)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/backends/utils.py", line 99, in execute
return super().execute(sql, params)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/backends/utils.py", line 67, in execute
return self._execute_with_wrappers(sql, params, many=False, executor=self._execute)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/backends/utils.py", line 76, in _execute_with_wrappers
return executor(sql, params, many, context)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/utils.py", line 89, in __exit__
raise dj_exc_value.with_traceback(traceback) from exc_value
File "/Users/wgarlock/Git/wagtaildev/lib/python3.7/site-packages/django/db/backends/utils.py", line 84, in _execute
return self.cursor.execute(sql, params)
django.db.utils.DatabaseError: SSL SYSCALL error: Operation timed out
这是我的Nginx设置
### base.py ###
import os
PROJECT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
BASE_DIR = os.path.dirname(PROJECT_DIR)
SECRET_KEY = os.getenv('SECRET_KEY_WAGTAILDEV')
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.2/howto/deployment/checklist/
# Application definition
INSTALLED_APPS = [
'home',
'search',
'wagtail.contrib.forms',
'wagtail.contrib.redirects',
'wagtail.embeds',
'wagtail.sites',
'wagtail.users',
'wagtail.snippets',
'wagtail.documents',
'wagtail.images',
'wagtail.search',
'wagtail.admin',
'wagtail.core',
'modelcluster',
'taggit',
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'storages',
]
MIDDLEWARE = [
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'django.middleware.security.SecurityMiddleware',
'wagtail.core.middleware.SiteMiddleware',
'wagtail.contrib.redirects.middleware.RedirectMiddleware',
]
ROOT_URLCONF = 'wagtaildev.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [
os.path.join(PROJECT_DIR, 'templates'),
],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'wagtaildev.wsgi.application'
# Database
# https://docs.djangoproject.com/en/2.2/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': 'django.db.backends.postgresql_psycopg2',
'HOST': os.getenv('DATABASE_HOST_WAGTAILDEV'),
'USER': os.getenv('DATABASE_USER_WAGTAILDEV'),
'PASSWORD': os.getenv('DATABASE_PASSWORD_WAGTAILDEV') ,
'NAME': os.getenv('DATABASE_NAME_WAGTAILDEV'),
'PORT': '5432',
}
}
# Password validation
# https://docs.djangoproject.com/en/2.2/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/2.2/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/
STATICFILES_FINDERS = [
'django.contrib.staticfiles.finders.FileSystemFinder',
'django.contrib.staticfiles.finders.AppDirectoriesFinder',
]
STATICFILES_DIRS = [
os.path.join(PROJECT_DIR, 'static'),
]
# ManifestStaticFilesStorage is recommended in production, to prevent outdated
# Javascript / CSS assets being served from cache (e.g. after a Wagtail upgrade).
# See https://docs.djangoproject.com/en/2.2/ref/contrib/staticfiles/#manifeststaticfilesstorage
STATICFILES_STORAGE = 'django.contrib.staticfiles.storage.ManifestStaticFilesStorage'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')
STATIC_URL = '/static/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')
MEDIA_URL = '/media/'
# Wagtail settings
WAGTAIL_SITE_NAME = "wagtaildev"
# Base URL to use when referring to full URLs within the Wagtail admin backend -
# e.g. in notification emails. Don't include '/admin' or a trailing slash
BASE_URL = 'http://example.com'
### production.py ###
from .base import *
DEBUG = True
ALLOWED_HOSTS = ['wagtaildev.wesgarlock.com', '127.0.0.1','134.209.230.125']
from wagtaildev.aws.conf import *
EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
MAX_UPLOAD_SIZE = "5242880000"
WAGTAILIMAGES_MAX_UPLOAD_SIZE = 5000 * 1024 * 1024
FILE_UPLOAD_TEMP_DIR = str(os.path.join(BASE_DIR, 'tmp'))
答案 0 :(得分：0)
我怀疑如果Droplet的内存不足，将会发生异常psycopg2.DatabaseError SSL SYSCALL error: Operation timed out。
尝试创建交换分区或扩展内存。
答案 1 :(得分：0)
我从来没有能够直接解决这个问题，但是我确实想出了一个解决办法。
我不是Wagtail或Django专家，所以我确定对此答案有适当的解决方案，但是无论如何，这就是我所做的。如果您对改进有任何建议，请随时发表评论。
请注意，这确实是文档，以提醒我我也做了什么。这时有很多多余的代码行（05-25-19），因为我科学怪人在一起编写了很多代码。我将加班时间编辑下来。
这是我科学怪人在一起创建该解决方案的教程。
也许还有其他一些，但这是原则。
好的，我们走了。
我创建了一个名为“ files”的应用，然后自定义文档对models.py文件进行了建模。您需要在设置文件中指定WAGTAILDOCS_DOCUMENT_MODEL ='files.LargeDocument'。我这样做的唯一原因是跟踪我正在更明确地更改的行为。此自定义文档模型只是在Wagtail中扩展了标准文档模型。
#models.py
from django.db import models
from wagtail.documents.models import AbstractDocument
from wagtail.admin.edit_handlers import FieldPanel
# Create your models here.
class LargeDocument(AbstractDocument):
admin_form_fields = (
'file',
)
panels = [
FieldPanel('file', classname='fn'),
]
接下来，您需要创建一个wagtail_hook.py文件，其中包含以下内容。
#wagtail_hook.py
from wagtail.contrib.modeladmin.options import (
ModelAdmin, modeladmin_register)
from .models import LargeDocument
from .views import LargeDocumentAdminView
class LargeDocumentAdmin(ModelAdmin):
model = LargeDocument
menu_label = 'Large Documents' # ditch this to use verbose_name_plural from model
menu_icon = 'pilcrow' # change as required
menu_order = 200 # will put in 3rd place (000 being 1st, 100 2nd)
add_to_settings_menu = False # or True to add your model to the Settings sub-menu
exclude_from_explorer = False # or True to exclude pages of this type from Wagtail's explorer view
create_template_name ='large_document_index.html'
# Now you just need to register your customised ModelAdmin class with Wagtail
modeladmin_register(LargeDocumentAdmin)
这使您可以做两件事：
这是html
{% extends "wagtailadmin/base.html" %}
{% load staticfiles cache %}
{% load static wagtailuserbar %}
{% load compress %}
{% load underscore_hyphan_to_space %}
{% load url_vars %}
{% load pagination_value %}
{% load static %}
{% load i18n %}
{% block titletag %}{{ view.page_title }}{% endblock %}
{% block content %}
{% include "wagtailadmin/shared/header.html" with title=view.page_title icon=view.header_icon %}
<!-- Google Signin Button -->
<div class="g-signin2" data-onsuccess="onSignIn" data-theme="dark">
</div>
<!-- Select the file to upload -->
<div class="input-group mb-3">
<link rel="stylesheet" href="{% static 'css/input.css'%}"/>
<div class="custom-file">
<input type="file" class="custom-file-input" id="file" name="file">
<label id="file_label" class="custom-file-label" style="width:auto!important;" for="inputGroupFile02" aria-describedby="inputGroupFileAddon02">Choose file</label>
</div>
<div class="input-group-append">
<span class="input-group-text" id="file_submission_button">Upload</span>
</div>
<div id="start_progress"></div>
</div>
<div class="progress-upload">
<div class="progress-upload-bar" role="progressbar" style="width: 100%;" aria-valuenow="100" aria-valuemin="0" aria-valuemax="100"></div>
</div>
{% endblock %}
{% block extra_js %}
{{ block.super }}
{{ form.media.js }}
<script src="https://apis.google.com/js/platform.js" async defer></script>
<script src="https://sdk.amazonaws.com/js/aws-sdk-2.148.0.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script>
<script src="{% static 'js/awsupload.js' %}"></script>
{% endblock %}
{% block extra_css %}
{{ block.super }}
{{ form.media.css }}
<meta name="google-signin-client_id" content="847336061839-9h651ek1dv7u1i0t4edsk8pd20d0lkf3.apps.googleusercontent.com">
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
{% endblock %}
然后我在views.py中创建了一些对象
#views.py
from django.shortcuts import render
# Create your views here.
import base64
import hashlib
import hmac
import os
import time
from rest_framework import permissions, status, authentication
from rest_framework.response import Response
from rest_framework.views import APIView
from .config_aws import (
AWS_UPLOAD_BUCKET,
AWS_UPLOAD_REGION,
AWS_UPLOAD_ACCESS_KEY_ID,
AWS_UPLOAD_SECRET_KEY
)
from .models import LargeDocument
import datetime
from wagtail.contrib.modeladmin.views import WMABaseView
from django.db.models.fields.files import FieldFile
from django.core.files import File
import urllib.request
from django.core.mail import send_mail
from .tasks import file_creator
class FilePolicyAPI(APIView):
"""
This view is to get the AWS Upload Policy for our s3 bucket.
What we do here is first create a LargeDocument object instance in our
Django backend. This is to include the LargeDocument instance in the path
we will use within our bucket as you'll see below.
"""
permission_classes = [permissions.IsAuthenticated]
authentication_classes = [authentication.SessionAuthentication]
def post(self, request, *args, **kwargs):
"""
The initial post request includes the filename
and auth credientails. In our case, we'll use
Session Authentication but any auth should work.
"""
filename_req = request.data.get('filename')
if not filename_req:
return Response({"message": "A filename is required"}, status=status.HTTP_400_BAD_REQUEST)
policy_expires = int(time.time()+5000)
user = request.user
username_str = str(request.user.username)
"""
Below we create the Django object. We'll use this
in our upload path to AWS.
Example:
To-be-uploaded file's name: Some Random File.mp4
Eventual Path on S3: <bucket>/username/2312/2312.mp4
"""
doc_obj = LargeDocument.objects.create(uploaded_by_user=user, )
doc_obj_id = doc_obj.id
doc_obj.title=filename_req
upload_start_path = "{location}".format(
location = "LargeDocuments/",
)
file_extension = os.path.splitext(filename_req)
filename_final = "{title}".format(
title= filename_req,
)
"""
Eventual file_upload_path includes the renamed file to the
Django-stored LargeDocument instance ID. Renaming the file is
done to prevent issues with user generated formatted names.
"""
final_upload_path = "{upload_start_path}/{filename_final}".format(
upload_start_path=upload_start_path,
filename_final=filename_final,
)
if filename_req and file_extension:
"""
Save the eventual path to the Django-stored LargeDocument instance
"""
policy_document_context = {
"expire": policy_expires,
"bucket_name": AWS_UPLOAD_BUCKET,
"key_name": "",
"acl_name": "public-read",
"content_name": "",
"content_length": 524288000,
"upload_start_path": upload_start_path,
}
policy_document = """
{"expiration": "2020-01-01T00:00:00Z",
"conditions": [
{"bucket": "%(bucket_name)s"},
["starts-with", "$key", "%(upload_start_path)s"],
{"acl": "public-read"},
["starts-with", "$Content-Type", "%(content_name)s"],
["starts-with", "$filename", ""],
["content-length-range", 0, %(content_length)d]
]
}
""" % policy_document_context
aws_secret = str.encode(AWS_UPLOAD_SECRET_KEY)
policy_document_str_encoded = str.encode(policy_document.replace(" ", ""))
url = 'https://thearchmedia.s3.amazonaws.com/'
policy = base64.b64encode(policy_document_str_encoded)
signature = base64.b64encode(hmac.new(aws_secret, policy, hashlib.sha1).digest())
doc_obj.file_hash = signature
doc_obj.path = final_upload_path
doc_obj.save()
data = {
"policy": policy,
"signature": signature,
"key": AWS_UPLOAD_ACCESS_KEY_ID,
"file_bucket_path": upload_start_path,
"file_id": doc_obj_id,
"filename": filename_final,
"url": url,
"username": username_str,
}
return Response(data, status=status.HTTP_200_OK)
class FileUploadCompleteHandler(APIView):
permission_classes = [permissions.IsAuthenticated]
authentication_classes = [authentication.SessionAuthentication]
def post(self, request, *args, **kwargs):
file_id = request.POST.get('file')
size = request.POST.get('fileSize')
data = {}
type_ = request.POST.get('fileType')
if file_id:
obj = LargeDocument.objects.get(id=int(file_id))
obj.size = int(size)
obj.uploaded = True
obj.type = type_
obj.file_hash
obj.save()
data['id'] = obj.id
data['saved'] = True
data['url']=obj.url
return Response(data, status=status.HTTP_200_OK)
class ModelFileCompletion(APIView):
permission_classes = [permissions.IsAuthenticated]
authentication_classes = [authentication.SessionAuthentication]
def post(self, request, *args, **kwargs):
file_id = request.POST.get('file')
url = request.POST.get('aws_url')
data = {}
if file_id:
obj = LargeDocument.objects.get(id=int(file_id))
file_creator.delay(obj.pk)
data['test'] = 'process started'
return Response(data, status=status.HTTP_200_OK)
def LargeDocumentAdminView(request):
context = super(WMABaseView, self).get_context(request)
render(request, 'modeladmin/files/index.html', context)
此视图围绕标准文件处理系统。我不想放弃标准的文件处理系统或编写一个新的文件处理系统。这就是为什么我称这种hack为非理想的解决方案。
// javascript upload file "awsupload.js"
var id_token; //token we get upon Authentication with Web Identiy Provider
function onSignIn(googleUser) {
var profile = googleUser.getBasicProfile();
// The ID token you need to pass to your backend:
id_token = googleUser.getAuthResponse().id_token;
}
$(document).ready(function(){
// setup session cookie data. This is Django-related
function getCookie(name) {
var cookieValue = null;
if (document.cookie && document.cookie !== '') {
var cookies = document.cookie.split(';');
for (var i = 0; i < cookies.length; i++) {
var cookie = jQuery.trim(cookies[i]);
// Does this cookie string begin with the name we want?
if (cookie.substring(0, name.length + 1) === (name + '=')) {
cookieValue = decodeURIComponent(cookie.substring(name.length + 1));
break;
}
}
}
return cookieValue;
}
var csrftoken = getCookie('csrftoken');
function csrfSafeMethod(method) {
// these HTTP methods do not require CSRF protection
return (/^(GET|HEAD|OPTIONS|TRACE)$/.test(method));
}
$.ajaxSetup({
beforeSend: function(xhr, settings) {
if (!csrfSafeMethod(settings.type) && !this.crossDomain) {
xhr.setRequestHeader("X-CSRFToken", csrftoken);
}
}
});
// end session cookie data setup.
// declare an empty array for potential uploaded files
var fileItemList = []
$(document).on('click','#file_submission_button', function(event){
var selectedFiles = $('#file').prop('files');
formItem = $(this).parent()
$.each(selectedFiles, function(index, item){
uploadFile(item)
})
$(this).val('');
$('.progress-upload-bar').attr('aria-valuenow',progress);
$('.progress-upload-bar').attr('width',progress.toString()+'%');
$('.progress-upload-bar').attr('style',"width:"+progress.toString()+'%');
$('.progress-upload-bar').text(progress.toString()+'%');
})
$(document).on('change','#file', function(event){
var selectedFiles = $('#file').prop('files');
$('#file_label').text(selectedFiles[0].name)
})
function constructFormPolicyData(policyData, fileItem) {
var contentType = fileItem.type != '' ? fileItem.type : 'application/octet-stream'
var url = policyData.url
var filename = policyData.filename
var repsonseUser = policyData.user
// var keyPath = 'www/' + repsonseUser + '/' + filename
var keyPath = policyData.file_bucket_path
var fd = new FormData()
fd.append('key', keyPath + filename);
fd.append('acl','private');
fd.append('Content-Type', contentType);
fd.append("AWSAccessKeyId", policyData.key)
fd.append('Policy', policyData.policy);
fd.append('filename', filename);
fd.append('Signature', policyData.signature);
fd.append('file', fileItem);
return fd
}
function fileUploadComplete(fileItem, policyData){
data = {
uploaded: true,
fileSize: fileItem.size,
file: policyData.file_id,
}
$.ajax({
method:"POST",
data: data,
url: "/api/files/complete/",
success: function(data){
displayItems(fileItemList)
},
error: function(jqXHR, textStatus, errorThrown){
alert("An error occured, please refresh the page.")
}
})
}
function modelComplete(policyData, aws_url){
data = {
file: policyData.file_id,
aws_url: aws_url
}
$.ajax({
method:"POST",
data: data,
url: "/api/files/modelcomplete/",
success:
console.log('model complete success') ,
error: function(jqXHR, textStatus, errorThrown){
alert("An error occured, please refresh the page.")
}
})
}
function displayItems(fileItemList){
var itemList = $('.item-loading-queue')
itemList.html("")
$.each(fileItemList, function(index, obj){
var item = obj.file
var id_ = obj.id
var order_ = obj.order
var html_ = "<div class=\"progress\">" +
"<div class=\"progress-bar\" role=\"progressbar\" style='width:" + item.progress + "%' aria-valuenow='" + item.progress + "' aria-valuemin=\"0\" aria-valuemax=\"100\"></div></div>"
itemList.append("<div>" + order_ + ") " + item.name + "<a href='#' class='srvup-item-upload float-right' data-id='" + id_ + ")'>X</a> <br/>" + html_ + "</div><hr/>")
})
}
function uploadFile(fileItem){
var policyData;
var newLoadingItem;
// get AWS upload policy for each file uploaded through the POST method
// Remember we're creating an instance in the backend so using POST is
// needed.
$.ajax({
method:"POST",
data: {
filename: fileItem.name
},
url: "/api/files/policy/",
success: function(data){
policyData = data
},
error: function(data){
alert("An error occured, please try again later")
}
}).done(function(){
// construct the needed data using the policy for AWS
var file = fileItem;
AWS.config.credentials = new AWS.WebIdentityCredentials({
RoleArn: 'arn:aws:iam::120974195102:role/thearchmedia-google-role',
ProviderId: null, // this is null for Google
WebIdentityToken: id_token // Access token from identity provider
});
var bucket = 'thearchmedia'
var key = 'LargeDocuments/'+file.name
var aws_url = 'https://'+bucket+'.s3.amazonaws.com/'+ key
var s3bucket = new AWS.S3({params: {Bucket: bucket}});
var params = {Key: key , ContentType: file.type, Body: file, ACL:'public-read', };
s3bucket.upload(params, function (err, data) {
$('#results').html(err ? 'ERROR!' : 'UPLOADED :' + data.Location);
}).on(
'httpUploadProgress', function(evt) {
progress = parseInt((evt.loaded * 100) / evt.total)
$('.progress-upload-bar').attr('aria-valuenow',progress)
$('.progress-upload-bar').attr('width',progress.toString()+'%')
$('.progress-upload-bar').attr('style',"width:"+progress.toString()+'%')
$('.progress-upload-bar').text(progress.toString()+'%')
}).send(
function(err, data) {
alert("File uploaded successfully.")
fileUploadComplete(fileItem, policyData)
modelComplete(policyData, aws_url)
});
})
}
})
.js和.view.py交互的说明
首先，在头中带有文件信息的Ajax调用将创建Document对象，但是由于该文件从不接触服务器，因此不会在Document对象中创建“ File”对象。这个“文件”对象包含我需要的功能，因此我需要做更多的事情。接下来，我的javascript文件使用AWS Javascript SDK将文件上传到我的s3存储桶。 SDK中的s3bucket.upload（）函数足够强大，可以上传高达5GB的文件，但不包括一些其他修改，它最多可以上传5TB（限制）。将文件上传到s3存储桶后，将发生我的最终API调用。最终的API调用将触发Celery任务，该任务会将文件下载到我的远程服务器上的临时目录中。该文件存在于我的远程服务器上后，即会创建File对象并将其保存到文档模型中。
task.py文件，处理从S3存储桶到远程服务器的文件下载，然后创建并将File对象保存到文档文件。
#task.py
from .models import LargeDocument
from celery import shared_task
import urllib.request
from django.core.mail import send_mail
from django.core.files import File
import threading
@shared_task
def file_creator(pk_num):
obj = LargeDocument.objects.get(pk=pk_num)
tmp_loc = 'tmp/'+ obj.title
def downloadit():
urllib.request.urlretrieve('https://thearchmedia.s3.amazonaws.com/LargeDocuments/' + obj.title, tmp_loc)
def after_dwn():
dwn_thread.join() #waits till thread1 has completed executing
#next chunk of code after download, goes here
send_mail(
obj.title + ' has finished to downloading to the server',
obj.title + 'Downloaded to server',
'info@thearchmedia.com',
['wes@wesgarlock.com'],
fail_silently=False,
)
reopen = open(tmp_loc, 'rb')
django_file = File(reopen)
obj.file = django_file
obj.save()
send_mail(
obj.title + ' has finished to downloading to the server',
'File Model Created for' + obj.title,
'info@thearchmedia.com',
['wes@wesgarlock.com'],
fail_silently=False,
)
dwn_thread = threading.Thread(target=downloadit)
dwn_thread.start()
metadata_thread = threading.Thread(target=after_dwn)
metadata_thread.start()
这是需要在Celery中运行的过程，因为下载大文件需要时间，而且我不想在浏览器打开的情况下等待。也是在task.py里面的是一个python thread（），它强制进程等待直到文件成功下载到远程服务器。如果您是Celery的新手，那么这里是他们文档的开始（http://docs.celeryproject.org/en/master/getting-started/introduction.html）
我还添加了一些电子邮件通知，以确认流程已完成。
最后的提示：我在项目中创建了一个/ tmp目录，并设置了每天删除所有文件的功能，以使其具有tmp功能。
crontab -e
find ~/thearchmedia/tmp -mtime +1 -delete