Class: Dap::Filter::FilterDecodeHTTPReply
- Inherits:
-
Object
- Object
- Dap::Filter::FilterDecodeHTTPReply
- Includes:
- BaseDecoder
- Defined in:
- lib/dap/filter/http.rb
Instance Attribute Summary
Attributes included from Base
Instance Method Summary collapse
Methods included from BaseDecoder
Methods included from Base
Instance Method Details
#decode(data) ⇒ Object
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# File 'lib/dap/filter/http.rb', line 137 def decode(data) lines = data.split(/\r?\n/) resp = lines.shift save = {} return save if resp !~ /^HTTP\/\d+\.\d+\s+(\d+)(?:\s+(.*))?/ save["http_code"] = $1.to_i save["http_message"] = ($2 ? $2.strip : '') save["http_raw_headers"] = {} save.merge!(parse_headers(lines)) head, raw_body = data.split(/\r?\n\r?\n/, 2) # Some buggy systems exclude the header entirely raw_body ||= head save["http_raw_body"] = [raw_body].pack("m*").gsub(/\s+/n, "") body = raw_body transfer_encoding = save["http_raw_headers"]["transfer-encoding"] if transfer_encoding && transfer_encoding.include?("chunked") offset = 0 chunk_num = 1 body = '' while (true) # read the chunk size from where we currently are. The chunk size will # be specified in hex, at the beginning, and is followed by \r\n. if /^(?<chunk_size_str>[a-z0-9]+)\r\n/i =~ raw_body.slice(offset, raw_body.size) # convert chunk size chunk_size = chunk_size_str.to_i(16) # advance past this chunk marker and its trailing \r\n offset += chunk_size_str.size + 2 if offset + chunk_size > raw_body.size $stderr.puts "Skipping impossibly large #{chunk_size}-byte ##{chunk_num} chunk, at offset #{offset}/#{raw_body.size}" break end # read this chunk, starting from just past the chunk marker and # stopping at the supposed end of the chunk body << raw_body.slice(offset, chunk_size) # advance the offset to past the end of the chunk and its trailing \r\n offset += chunk_size + 2 chunk_num += 1 else break end end # chunked-encoding allows headers to occur after the chunks, so parse those if offset < raw_body.size trailing_headers = parse_headers(raw_body.slice(offset, raw_body.size).split(/\r?\n/)) save.merge!(trailing_headers) { |header, old, new| if old.kind_of?(String) [old, new].join(',') elsif old.kind_of?(Hash) old.merge(new) { |nheader, nold, nnew| nold + nnew } end } end end content_encoding = save["http_raw_headers"]["content-encoding"] if content_encoding && content_encoding.include?("gzip") begin gunzip = Zlib::GzipReader.new(StringIO.new(body)) body = gunzip.read.encode('UTF-8', :invalid=>:replace, :replace=>'?') gunzip.close() rescue end end save["http_body"] = body if body =~ /<title>([^>]+)</mi save["http_title"] = $1.strip end save end |
#parse_headers(lines) ⇒ Object
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# File 'lib/dap/filter/http.rb', line 221 def parse_headers(lines) headers = {} while lines.length > 0 hline = lines.shift if /^(?<header_name>[^:]+):\s*(?<header_value>.*)$/ =~ hline header_value.strip! header_name.downcase! if valid_header_name?(header_name) headers["http_raw_headers"] ||= {} headers["http_raw_headers"][header_name] ||= [] headers["http_raw_headers"][header_name] << header_value # XXX: warning, all of these mishandle duplicate headers case header_name when 'etag' headers["http_etag"] = header_value when 'set-cookie' bits = header_value.gsub(/\;?\s*path=.*/i, '').gsub(/\;?\s*expires=.*/i, '').gsub(/\;\s*HttpOnly.*/, '') headers["http_cookie"] = bits when 'server' headers["http_server"] = header_value when 'x-powered-by' headers["http_powered"] = header_value when 'date' begin d = DateTime.parse(header_value) headers["http_date"] = d.to_time.utc.strftime("%Y%m%dT%H:%M:%S%z") if d rescue end when 'last-modified' begin d = DateTime.parse(header_value) headers["http_modified"] = d.to_time.utc.strftime("%Y%m%dT%H:%M:%S%z") if d rescue end when 'location' headers["http_location"] = header_value when 'www-authenticate' headers["http_auth"] = header_value when 'content-length' headers["content-length"] = header_value.to_i end else # not a valid header. XXX, eventually we should log or do something more useful here end elsif hline == "" break end end return headers end |
#valid_header_name?(name) ⇒ Boolean
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# File 'lib/dap/filter/http.rb', line 217 def valid_header_name?(name) return name !~ /[\x00-\x1f()<>@,;:\\\"\/\[\]?={}\s]/ end |