def _resolve_text_type(mod, text_type, stream):
# only attempt to resolve between html and other text types
if text_type != 'html':
return mod, stream
buff = stream.read(128)
wrapped_stream = BufferedReader(stream, starting_data=buff)
# check if starts with a tag, then likely html
if RewriteContent.TAG_REGEX.match(buff):
mod = 'html'
return mod, wrapped_stream
def handle_connect(self, env):
sock = self.get_request_socket(env)
if not sock:
return WbResponse.text_response('HTTPS Proxy Not Supported',
'405 HTTPS Proxy Not Supported')
sock.send('HTTP/1.0 200 Connection Established\r\n')
sock.send('Server: pywb proxy\r\n')
sock.send('\r\n')
hostname, port = env['REL_REQUEST_URI'].split(':')
if not self.use_wildcard:
certfile = self.ca.cert_for_host(hostname)
else:
certfile = self.ca.get_wildcard_cert(hostname)
try:
ssl_sock = ssl.wrap_socket(sock,
server_side=True,
certfile=certfile,
#ciphers="ALL",
suppress_ragged_eofs=False,
ssl_version=ssl.PROTOCOL_SSLv23
)
env['pywb.proxy_ssl_sock'] = ssl_sock
buffreader = BufferedReader(ssl_sock, block_size=self.BLOCK_SIZE)
statusline = buffreader.readline().rstrip()
except Exception as se:
raise BadRequestException(se.message)
statusparts = statusline.split(' ')
if len(statusparts) < 3:
raise BadRequestException('Invalid Proxy Request: ' + statusline)
env['REQUEST_METHOD'] = statusparts[0]
env['REL_REQUEST_URI'] = ('https://' +
env['REL_REQUEST_URI'].replace(':443', '') +
statusparts[1])
env['SERVER_PROTOCOL'] = statusparts[2].strip()
env['pywb.proxy_scheme'] = 'https'
env['pywb.proxy_host'] = hostname
env['pywb.proxy_port'] = port
env['pywb.proxy_req_uri'] = statusparts[1]
queryparts = env['REL_REQUEST_URI'].split('?', 1)
env['PATH_INFO'] = queryparts[0]
env['QUERY_STRING'] = queryparts[1] if len(queryparts) > 1 else ''
env['pywb.proxy_query'] = env['QUERY_STRING']
while True:
line = buffreader.readline()
if line:
line = line.rstrip()
if not line:
break
parts = line.split(':', 1)
if len(parts) < 2:
continue
name = parts[0].strip()
value = parts[1].strip()
name = name.replace('-', '_').upper()
if name not in ('CONTENT_LENGTH', 'CONTENT_TYPE'):
name = 'HTTP_' + name
env[name] = value
remain = buffreader.rem_length()
if remain > 0:
remainder = buffreader.read(self.BLOCK_SIZE)
env['wsgi.input'] = BufferedReader(ssl_sock,
block_size=self.BLOCK_SIZE,
starting_data=remainder)
def rewrite_content(self,
urlrewriter,
status_headers,
stream,
head_insert_func=None,
urlkey='',
cdx=None,
cookie_rewriter=None,
env=None):
wb_url = urlrewriter.wburl
if (wb_url.is_identity
or (not head_insert_func and wb_url.is_banner_only)):
status_headers, stream = self.sanitize_content(
status_headers, stream)
return (status_headers, self.stream_to_gen(stream), False)
if urlrewriter and cdx and cdx.get('is_live'):
urlrewriter.rewrite_opts['is_live'] = True
rule = self.ruleset.get_first_match(urlkey)
(rewritten_headers,
stream) = self._rewrite_headers(urlrewriter, rule, status_headers,
stream, urlkey, cookie_rewriter)
res = self.handle_custom_rewrite(rewritten_headers, stream,
urlrewriter, wb_url.mod, env)
if res:
return res
# Handle text content rewriting
# ====================================================================
# special case -- need to ungzip the body
status_headers = rewritten_headers.status_headers
text_type = rewritten_headers.text_type
# see known js/css modifier specified, the context should run
# default text_type
mod = wb_url.mod
stream_raw = False
encoding = None
first_buff = b''
for decomp_type in BufferedReader.get_supported_decompressors():
matched, stream = self._check_encoding(rewritten_headers, stream,
decomp_type)
if matched:
break
if mod == 'js_':
text_type, stream = self._resolve_text_type(
'js', text_type, stream)
elif mod == 'cs_':
text_type, stream = self._resolve_text_type(
'css', text_type, stream)
# for proxy mode: use special js_proxy rewriter
# which may be none rewriter + custom rules (if any)
if text_type == 'js' and not urlrewriter.prefix:
rewriter_class = rule.rewriters['js_proxy']
else:
rewriter_class = rule.rewriters[text_type]
# for html, need to perform header insert, supply js, css, xml
# rewriters
if text_type == 'html':
head_insert_str = ''
charset = rewritten_headers.charset
# if no charset set, attempt to extract from first 1024
if not rewritten_headers.charset:
first_buff = stream.read(1024)
charset = self._extract_html_charset(first_buff,
status_headers)
if head_insert_func and not wb_url.is_url_rewrite_only:
head_insert_orig = head_insert_func(rule, cdx)
if charset:
try:
head_insert_str = webencodings.encode(
head_insert_orig, charset)
except:
pass
if not head_insert_str:
charset = 'utf-8'
head_insert_str = head_insert_orig.encode(charset)
head_insert_buf = head_insert_str
#head_insert_str = to_native_str(head_insert_str)
head_insert_str = head_insert_str.decode('iso-8859-1')
if wb_url.is_banner_only:
gen = self._head_insert_only_gen(head_insert_buf, stream,
first_buff)
content_len = status_headers.get_header('Content-Length')
try:
content_len = int(content_len)
except Exception:
content_len = None
if content_len and content_len >= 0:
content_len = str(content_len + len(head_insert_str))
status_headers.replace_header('Content-Length',
content_len)
return (status_headers, gen, False)
# if proxy, use js_proxy rewriter
if not urlrewriter.prefix:
js_rewriter_class = rule.rewriters['js_proxy']
else:
js_rewriter_class = rule.rewriters['js']
css_rewriter_class = rule.rewriters['css']
if wb_url.is_url_rewrite_only:
js_rewriter_class = JSNoneRewriter
rewriter = rewriter_class(urlrewriter,
js_rewriter_class=js_rewriter_class,
css_rewriter_class=css_rewriter_class,
head_insert=head_insert_str,
url=wb_url.url,
defmod=self.defmod,
parse_comments=rule.parse_comments)
else:
if wb_url.is_banner_only:
return (status_headers, self.stream_to_gen(stream), False)
# url-only rewriter, but not rewriting urls in JS, so return
if wb_url.is_url_rewrite_only and text_type == 'js':
#return (status_headers, self.stream_to_gen(stream), False)
rewriter_class = JSLinkOnlyRewriter
# apply one of (js, css, xml) rewriters
rewriter = rewriter_class(urlrewriter)
# align to line end for all non-html rewriting
align = (text_type != 'html')
# Create rewriting generator
gen = self.rewrite_text_stream_to_gen(stream,
rewrite_func=rewriter.rewrite,
final_read_func=rewriter.close,
first_buff=first_buff,
align_to_line=align)
return (status_headers, gen, True)
def handle_connect(self, env):
sock = self.get_request_socket(env)
if not sock:
return WbResponse.text_response('HTTPS Proxy Not Supported',
'405 HTTPS Proxy Not Supported')
sock.send(b'HTTP/1.0 200 Connection Established\r\n')
sock.send(b'Proxy-Connection: close\r\n')
sock.send(b'Server: pywb proxy\r\n')
sock.send(b'\r\n')
hostname, port = env['REL_REQUEST_URI'].split(':')
if not self.use_wildcard:
certfile = self.ca.cert_for_host(hostname)
else:
certfile = self.ca.get_wildcard_cert(hostname)
try:
ssl_sock = ssl.wrap_socket(
sock,
server_side=True,
certfile=certfile,
#ciphers="ALL",
suppress_ragged_eofs=False,
ssl_version=ssl.PROTOCOL_SSLv23)
env['pywb.proxy_ssl_sock'] = ssl_sock
buffreader = BufferedReader(ssl_sock, block_size=self.BLOCK_SIZE)
statusline = to_native_str(buffreader.readline().rstrip())
except Exception as se:
raise BadRequestException(se.message)
statusparts = statusline.split(' ')
if len(statusparts) < 3:
raise BadRequestException('Invalid Proxy Request: ' + statusline)
env['REQUEST_METHOD'] = statusparts[0]
env['REL_REQUEST_URI'] = ('https://' +
env['REL_REQUEST_URI'].replace(':443', '') +
statusparts[1])
env['SERVER_PROTOCOL'] = statusparts[2].strip()
env['pywb.proxy_scheme'] = 'https'
env['pywb.proxy_host'] = hostname
env['pywb.proxy_port'] = port
env['pywb.proxy_req_uri'] = statusparts[1]
queryparts = env['REL_REQUEST_URI'].split('?', 1)
env['PATH_INFO'] = queryparts[0]
env['QUERY_STRING'] = queryparts[1] if len(queryparts) > 1 else ''
env['pywb.proxy_query'] = env['QUERY_STRING']
while True:
line = to_native_str(buffreader.readline())
if line:
line = line.rstrip()
if not line:
break
parts = line.split(':', 1)
if len(parts) < 2:
continue
name = parts[0].strip()
value = parts[1].strip()
name = name.replace('-', '_').upper()
if name not in ('CONTENT_LENGTH', 'CONTENT_TYPE'):
name = 'HTTP_' + name
env[name] = value
env['wsgi.input'] = buffreader
def rewrite_content(self, urlrewriter, status_headers, stream,
head_insert_func=None, urlkey='',
cdx=None, cookie_rewriter=None, env=None):
wb_url = urlrewriter.wburl
if (wb_url.is_identity or
(not head_insert_func and wb_url.is_banner_only)):
status_headers, stream = self.sanitize_content(status_headers,
stream)
return (status_headers, self.stream_to_gen(stream), False)
if urlrewriter and cdx and cdx.get('is_live'):
urlrewriter.rewrite_opts['is_live'] = True
rule = self.ruleset.get_first_match(urlkey)
(rewritten_headers, stream) = self._rewrite_headers(urlrewriter,
rule,
status_headers,
stream,
urlkey,
cookie_rewriter)
status_headers = rewritten_headers.status_headers
res = self.handle_custom_rewrite(rewritten_headers.text_type,
status_headers,
stream,
env)
if res:
return res
# Handle text content rewriting
# ====================================================================
# special case -- need to ungzip the body
text_type = rewritten_headers.text_type
# see known js/css modifier specified, the context should run
# default text_type
mod = wb_url.mod
stream_raw = False
encoding = None
first_buff = b''
for decomp_type in BufferedReader.get_supported_decompressors():
matched, stream = self._check_encoding(rewritten_headers,
stream,
decomp_type)
if matched:
break
if mod == 'js_':
text_type, stream = self._resolve_text_type('js',
text_type,
stream)
elif mod == 'cs_':
text_type, stream = self._resolve_text_type('css',
text_type,
stream)
rewriter_class = rule.rewriters[text_type]
# for html, need to perform header insert, supply js, css, xml
# rewriters
if text_type == 'html':
head_insert_str = ''
charset = rewritten_headers.charset
# if no charset set, attempt to extract from first 1024
if not rewritten_headers.charset:
first_buff = stream.read(1024)
charset = self._extract_html_charset(first_buff,
status_headers)
if head_insert_func and not wb_url.is_url_rewrite_only:
head_insert_orig = head_insert_func(rule, cdx)
if charset:
try:
head_insert_str = webencodings.encode(head_insert_orig, charset)
except:
pass
if not head_insert_str:
charset = 'utf-8'
head_insert_str = head_insert_orig.encode(charset)
head_insert_buf = head_insert_str
#head_insert_str = to_native_str(head_insert_str)
head_insert_str = head_insert_str.decode('iso-8859-1')
if wb_url.is_banner_only:
gen = self._head_insert_only_gen(head_insert_buf,
stream,
first_buff)
content_len = status_headers.get_header('Content-Length')
try:
content_len = int(content_len)
except Exception:
content_len = None
if content_len and content_len >= 0:
content_len = str(content_len + len(head_insert_str))
status_headers.replace_header('Content-Length',
content_len)
return (status_headers, gen, False)
js_rewriter_class = rule.rewriters['js']
css_rewriter_class = rule.rewriters['css']
if wb_url.is_url_rewrite_only:
js_rewriter_class = JSNoneRewriter
rewriter = rewriter_class(urlrewriter,
js_rewriter_class=js_rewriter_class,
css_rewriter_class=css_rewriter_class,
head_insert=head_insert_str,
url=wb_url.url,
defmod=self.defmod,
parse_comments=rule.parse_comments)
else:
if wb_url.is_banner_only:
return (status_headers, self.stream_to_gen(stream), False)
# url-only rewriter, but not rewriting urls in JS, so return
if wb_url.is_url_rewrite_only and text_type == 'js':
#return (status_headers, self.stream_to_gen(stream), False)
rewriter_class = JSLinkOnlyRewriter
# apply one of (js, css, xml) rewriters
rewriter = rewriter_class(urlrewriter)
# align to line end for all non-html rewriting
align = (text_type != 'html')
# Create rewriting generator
gen = self.rewrite_text_stream_to_gen(stream,
rewrite_func=rewriter.rewrite,
final_read_func=rewriter.close,
first_buff=first_buff,
align_to_line=align)
return (status_headers, gen, True)
