[http] get rid of requests.utils

visidata/loaders/http.py

@@ -1,3 +1,5 @@
+import re
+
 from visidata import Path, RepeatFile, vd, VisiData
 from visidata.loaders.tsv import splitter
 
@@ -20,7 +22,6 @@ def openurl_http(vd, path, filetype=None):
  return openfunc(Path(schemes[-1]+'://'+path.given.split('://')[1]))
 
  import urllib.request
- import requests.utils
  import urllib.error
  import mimetypes
 
@@ -48,7 +49,7 @@ def _iter_lines(path=path, response=response, max_next=vd.options.http_max_next)
  linkhdr = response.getheader('Link')
  src = None
  if linkhdr:
- links = requests.utils.parse_header_links(linkhdr)
+ links = parse_header_links(linkhdr)
  link_data = {}
  for link in links:
  key = link.get('rel') or link.get('url')
@@ -72,5 +73,30 @@ def _iter_lines(path=path, response=response, max_next=vd.options.http_max_next)
 
  return vd.openSource(path, filetype=filetype)
 
+def parse_header_links(value):
+ """Return a list of parsed link headers proxies.
+ i.e. Link: <http:/.../front.jpeg>; rel=front; type="image/jpeg",<http://.../back.jpeg>; rel=back;type="image/jpeg"
+ :rtype: list
+ """
+
+ links = []
+ replace_chars = ' \'"'
+ value = value.strip(replace_chars)
+ if not value:
+ return links
+ for val in re.split(', *<', value):
+ try:
+ url, params = val.split(';', 1)
+ except ValueError:
+ url, params = val, ''
+ link = {'url': url.strip('<> \'"')}
+ for param in params.split(';'):
+ try:
+ key, value = param.split('=')
+ except ValueError:
+ break
+ link[key.strip(replace_chars)] = value.strip(replace_chars)
+ links.append(link)
+ return links
 
 VisiData.openurl_https = VisiData.openurl_http