前言

描述

有时写Markdown会把图片放在图床,而且图床上传图片后会改变图片的名称,想要下载下来备份并不是很方便,不如写个程序自动保存一下,以后不想用图床了还可以把图片直接放在自己的服务器,这时只需要批量对图片地址进行替换。

举例

像这样,我使用了hello图床

hello图床(https://www.helloimg.com/)

但是当我像把图片放到服务器上,不再用图床了,就得这样改

即将https://www.helloimg.com/images/2021/02/10替换成/static/post

前提是图片名称和在图床上一样

那么如何保持一样?直接从图床上下载图片就好

这个程序就是替你完成这个工作

开始

程序

Python3程序

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'''
Author: LX
Blog: blog.lxscloud.top
'''
import time
import requests
import os

mddir = './md/' #设置根路径
dldir = './dl/'
markdown_setup = ["![", "](", ")"]
download_list = ["https://", "http://"]
ext_name = ["md"]

def checkdir_andcreate(dir_path_set):
if dir_path_set[-1:] == "":
dir_path_set = dir_path_set[0:-1]
if os.path.isdir(dir_path_set) == False:
os.mkdir(dir_path_set)


def file_size_trans(filesize_input_B):
precent_unit = ''
# KB
if 1024 <= filesize_input_B < (1024 ** 2):
precent_unit = 'KB'
filesize_input_B = filesize_input_B / 1024
# MB
elif (1024 ** 2) <= filesize_input_B < (1024 ** 3):
precent_unit = 'MB'
filesize_input_B = filesize_input_B / (1024 ** 2)
# GB
elif (1024 ** 3) <= filesize_input_B < (1024 ** 4):
precent_unit = 'GB'
filesize_input_B = filesize_input_B / (1024 ** 3)
# TB
elif (1024 ** 4) <= filesize_input_B < (1024 ** 5):
precent_unit = 'TB'
filesize_input_B = filesize_input_B / (1024 ** 4)
# B
else:
precent_unit = 'Byte'
r_info = "{:.1f}".format(filesize_input_B) + ' ' + precent_unit
return r_info

def download_file_with_speed(download_url, dirset = "."):
dirset += "/"
# 流式请求下载地址并以下载名保存文件
with requests.get(download_url, stream=True) as r, open(dirset + download_url[download_url.rindex("/")+1:], 'wb') as file:
# 获得文件的大小,单位字节B
total_size = int(r.headers['content-length'])
# 已下载的字节大小
content_size = 0
# 进度下载完成的百分比
process_p = 0
# 记录开始时间
start_time = time.time()
# 到上一秒的下载的文件大小
temp_size = 0
# 开始下载每次请求1024字节
for content in r.iter_content(chunk_size=1024):
file.write(content)
# 更新下载大小
content_size += len(content)
# 计算下载进度
process_p = (content_size / total_size) * 100
# 每一秒统计一次下载量
if time.time() - start_time > 1:
# 重置开始时间
start_time = time.time()
# 每秒的下载量
speed = content_size - temp_size
print('Process: {:.1f}% Speed: {}/S'.format(process_p, file_size_trans(speed)))
# 重置以下载大小
temp_size = content_size

print('100% Size: {}'.format(file_size_trans(total_size)))


def check_mark(str_line, list_check, mode_check):
resault_check = False
for i in list_check:
if mode_check == True:
resault_check = True
try:
str_line.index(i)
except:
resault_check = False
break
elif mode_check == False:
resault_check = False
state = 0
try:
str_line.index(i)
state = 1
except:
state = 0
if state == 1:
resault_check = True
break
else:
resault_check = False
return resault_check

def read_and_find(file_name):
f1_n = file_name
dir_set = dldir + f1_n[f1_n.rindex("/")+1:f1_n.rindex(".")]
try:
os.mkdir(dir_set)
dir_set_ok = True
except:
print("Dir create fail")
dir_set_ok = False
if dir_set_ok:
try:
file_processing = open(file_name, 'r', encoding = 'utf-8')
for line in file_processing.readlines():
lines = str(line)
if check_mark(lines, markdown_setup, True) == True:
http_l = lines.index("](") + 2
http_r = lines.index(")", http_l)
pic_http_addr = lines[http_l:http_r]

if check_mark(pic_http_addr,download_list , False):
print("Try to download:", pic_http_addr)
try:
download_file_with_speed(pic_http_addr, dir_set)
print()
except:
print("Err download:", pic_http_addr)
print()
file_processing.close()
return True
except:
print("Err at read file :", file_name)
return False

checkdir_andcreate(dldir)
checkdir_andcreate(mddir)

dict_pic_path = []
list = os.listdir(mddir) #列出文件夹下所有的目录与文件
for i in range(0,len(list)):
path = os.path.join(mddir,list[i])
if os.path.isfile(path):
str_path = str(path)
str_path = str_path[str_path.rfind(".")+1:]
for i in ext_name: #忽略不在白名单的扩展名
if str_path == i:
#print(path)
dict_pic_path.append(path)
break

for i in dict_pic_path:
print("File:", i)
print("-----------------------------------")
read_and_find(i)
print("-----------------------------------\n")

运行

初次运行会产生md和dl文件夹

请将目标markdown文件放入md文件夹

然后再次运行程序,即可在dl文件夹看到下载的图片

状况

运行后报错可能是因为

缺少必要库requests

1
pip3 install requests

使用的是python2.7

请使用python3解释器运行

1
python3

Dir create fail

程序可能没有创建目录的权限或目录不可写

Err at read file

无法读取markdown文件,可能是没有读取权限

Err download

下载错误,图片不存在或网络不通

结束

谢谢观看

EOF