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,
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
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。
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