如何用Python发布含文字多图的Facebook主页帖子？解决重复报错

我尝试用Python在Facebook主页发布带文字和多张图片的帖子，编写了如下代码：

import requests
import tempfile
import os
import json

params = {
    'access_token': 'MY_ACCESS_TOKEN',
    'format': 'json'
}

image_urls = ['https://example.com/images/tw8qxmjwrb.jpg', 'https://example.com/images/g41oikacph.jpg']

temp_images = []
for url in image_urls:
    response = requests.get(url)
    if response.status_code == 200:
        with tempfile.NamedTemporaryFile(delete=False) as file:
            file.write(response.content)
            temp_image_path = file.name
        temp_images.append(temp_image_path)

uploaded_images = []
for temp_image in temp_images:
    with open(temp_image, 'rb') as file:
        files = {'source': file}
        response = requests.post('https://graph.facebook.com/v11.0/PAGE_ID/photos', params=params, files=files)
        if response.status_code == 200:
            uploaded_images.append(response.json().get('id'))
        else:
            print('Failed to upload image:', response.json())

for temp_image in temp_images:
    os.remove(temp_image)

args = {
    "message": "HELLO WORLD.",
    "attached_media[0]": json.dumps({"media_fbid": uploaded_images[0]}),
    "attached_media[1]": json.dumps({"media_fbid": uploaded_images[1]}),
    "published": True
}

response = requests.post('https://graph.facebook.com/v11.0/PAGE_ID/feed', params=params, data=args)

print(response.status_code, response.json())

运行代码后出现报错：

{'error': {'message': 'Invalid parameter', 'type': 'OAuthException', 'code': 100, 'error_subcode': 1366051, 'is_transient': False, 'error_user_title': 'Already Posted', 'error_user_msg': 'These photos were already posted.'}}

解决方案 #

问题根源是上传图片时，默认会直接将图片单独发布到主页，后续通过feed接口关联这些图片时，系统判定图片已发布，因此抛出重复发布的错误。

解决方法是在上传单张图片前，给请求参数添加published: False，让图片仅上传至Facebook服务器但不单独发布，之后再通过feed接口将文字与多张图片合并发布。

在上传图片的循环前添加如下代码：

params['published'] = False

修改后的上传图片段代码如下：

uploaded_images = []
# 添加参数，设置图片仅上传不发布
params['published'] = False
for temp_image in temp_images:
    with open(temp_image, 'rb') as file:
        files = {'source': file}
        response = requests.post('https://graph.facebook.com/v11.0/PAGE_ID/photos', params=params, files=files)
        if response.status_code == 200:
            uploaded_images.append(response.json().get('id'))
        else:
            print('Failed to upload image:', response.json())

修改后即可成功发布包含文字和多张图片的Facebook主页帖子。

内容的提问来源于stack exchange，提问作者Bassem v3