AWS S3：图像正在上传到存储桶，但文件未显示在heroku Django中

Question

图片正在上传到存储桶中，但运行时未显示在应用中。 请帮忙

这里我使用Employee.objects.all（）函数从数据库中获取详细信息。 请看一下，请帮助我

站点地址为： https : //mttemployee.herokuapp.com

您可以使用以下用户名对其进行测试：用户名：first和emp ID：1

请帮我快速

settings.py文件

import os
import django_heroku

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
TEMPLATE_DIR = os.path.join(BASE_DIR,'templates')
STATIC_DIR = os.path.join(BASE_DIR, 'static')


SECRET_KEY = '=^tpe+kln3xg-_kclfay62+4l6c@_l%fj_^k@h0xc5%(0cp^h9'

DEBUG = True

ALLOWED_HOSTS = ['mttemployee.herokuapp.com']


# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'manager',
    'storages'
]

MIDDLEWARE = [
    'django.middleware.security.SecurityMiddleware',
    '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',
]

ROOT_URLCONF = 'empmanagement.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [TEMPLATE_DIR],
        '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 = 'empmanagement.wsgi.application'


# Database

DATABASES = {
    'default': {
        'ENGINE': 'django.db.backends.postgresql',
        'NAME': 'empmanage',
        # 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
        'USER': 'postgres',
        'PASSWORD': '1234',
        'HOST': 'localhost',
    }
}


# 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',
    },
]


LANGUAGE_CODE = 'en-us'

TIME_ZONE = 'UTC'

USE_I18N = True

USE_L10N = True

USE_TZ = True

AWS_ACCESS_KEY_ID = 'xyz'
AWS_SECRET_ACCESS_KEY = 'yxz'
AWS_STORAGE_BUCKET_NAME = 'empmanagementheroku'

AWS_S3_FILE_OVERWRITE = False
AWS_DEFAULT_ACL = None

DEFAULT_FILE_STORAGE = 'storages.backends.s3boto3.S3Boto3Storage'

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.2/howto/static-files/

STATIC_URL = '/static/'

STATICFILES_DIRS = [
    STATIC_DIR,
]

STATIC_ROOT = os.path.join(BASE_DIR, 'staticsfiles')

MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

# Activate Django-Heroku.
django_heroku.settings(locals())

models.py文件

from django.db import models

# Create your models here.

class Employee(models.Model):

    first_name  = models.CharField(default="", max_length=50)
    last_name   = models.CharField(default="", max_length=50)
    username    = models.CharField(default="", max_length=50)
    empid       = models.CharField(default="" ,max_length=50)
    dob         = models.DateField(max_length=8)
    address     = models.TextField()
    doj         = models.DateField(max_length=8)
    photo       = models.ImageField(upload_to = 'pics', default = 'pic/default.png')

views.py文件

from django.shortcuts import render, redirect
from django.http import HttpResponse
from django.contrib.auth.models import User, auth
from manager.models import Employee
# Create your views here.


def login(request):
    if(request.method == 'POST'):
        username = request.POST['username']
        empid = request.POST['empid']  
        userdetails = Employee.objects.all()

        for userdetail in userdetails:
            if (userdetail.username == username and userdetail.empid == empid):
                f = 1
                return render(request, 'accounts/details.html',{'userdetail': userdetail})
            else:
                f=0    
        if(f!=1):
            flag = "Invalid Credentials"
            return render(request, 'manager/index.html',{'flag': flag})

    else:
        return render(request,'manager/index.html')

def back(request):
    return render(request, 'manager/index.html')

details.html

{% load staticfiles %}
<!DOCTYPE html>
<html lang="en" dir="ltr">
  <head>
    <meta charset="utf-8">
    <title></title>
    <link rel="stylesheet" type="text/css" href="{% static 'mystyle.css'%}">
  </head>
  <body>
   <div class="formclass">
    <h1>Details </h1> <br>

    <div class="tablestyle">
     <table align=center>
              <tr><td>Photo : </td><td><img src="{{userdetail.photo.url}}" width=100 height=100 alt=""></td></tr>
              <tr><td>Name  : </td> <td>{{userdetail.first_name}} {{userdetail.last_name}}</td></tr>
              <tr><td>Date of Birth :</td><td>{{userdetail.dob}}</td></tr>
              <tr><td>Address : </td><td>{{userdetail.address}}</td></tr>

              <tr><td>Date Joined : </td><td>{{userdetail.doj}}</td></tr>  
              </table>   
              <br>
    </div> 


              <form action='back' method='post'>
               {% csrf_token %}

              <button type="submit" name="button">Back</button>

      </form>
      <br>
      </div>
  </body>
</html>

Answer 1

如果您不需要使用预签名访问权限，则只需更新S3存储桶策略即可将所有文件公开。 像这样的所有策略或将语句附加到您现有的策略中。

{
  "Id": "Policy1564661477612",
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "Stmt1564661472973",
      "Action": [
        "s3:GetObject"
      ],
      "Effect": "Allow",
      "Resource": "*",
      "Principal": "*"
    }
  ]
}

在这种情况下，您不需要在URL中传递类似AWSAccessKeyId=...参数。

否则，如果需要访问预签名文件，请按照此指南https://boto3.amazonaws.com/v1/documentation/api/latest/guide/s3-presigned-urls.html上载文件，但请记住文件URL将在有限的时间内可用。