使用python3批量下载rbsp数据的示例代码

1. 原始网站
https://www.rbsp-ect.lanl.gov/data_pub/rbspa/

2. 算法说明
进入需要下载的数据所在的目录，获取并解析该目录下的信息，解析出cdf文件名后，将cdf文件下载到内存中，随后保存到硬盘中。程序使用python3实现。

3. 程序代码

#!/bin/python3
# get the rbsp data
# writen by Liangjin Song on 20191219
import sys
import requests
from pathlib import Path

# the url containing the cdf files
url="https://www.rbsp-ect.lanl.gov/data_pub/rbspa/ECT/level2/2016/"
# local path to save the cdf file
path="/home/liangjin/Downloads/test/"

def main():
 re=requests.get(url)
 html=re.text
 cdfs=resolve_cdf(html)

ncdf=len(cdfs)
 if ncdf == 0:
   return

print(str(ncdf) + " cdf files are detected.")

i=1
 # download
 for f in cdfs:
   rcdf=url+f
   lcdf=path+f
   print(str(i)+ "  Downloading " + rcdf)
   download_cdf(rcdf,lcdf)
   i+=1
 return

# resolve the file name of cdf
def resolve_cdf(html):
 cdfs=list()
 head=html.find("href=")

if head == -1:
   print("The cdf files not found!")
   return cdfs

leng=len(html)

while head != -1:
   tail=html.find(">",head,leng)
   # Extract the cdf file name
   cdf=html[head+6:tail-1]
   head=html.find("href=",tail,leng)
   if cdf.find('cdf') == -1:
     continue
   cdfs.append(cdf)
 return cdfs

def download_cdf(rcdf,lcdf):
 rfile=requests.get(rcdf)
 with open(lcdf,"wb") as f:
   f.write(rfile.content)
 f.close()
 return

if __name__ == "__main__":
 lpath=Path(path)
 if not lpath.is_dir():
   print("Path not found: " + path)
   sys.exit(0)
 sys.exit(main())

4. 使用说明

url为远程cdf文件所在路径。
path为本地保存cdf文件的路径。
url和path的末尾都有“/”（Linux下情形，若是Windows，路径分隔符为“\\”，则path末尾应为“\\”）。

5. 运行效果

来源：https://blog.csdn.net/Function_RY/article/details/103622772