Class: HTTP::Response

Inherits:
Object show all
Defined in:
lib/http_crawler/http/response.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#validations ⇒ Object

验证码判断



152
153
154
 
# File 'lib/http_crawler/http/response.rb', line 152

def validations
  @validations
end

Instance Method Details

#content(data = nil) ⇒ Object

获取正文内容



115
116
117
118
119
120
121
122
 
# File 'lib/http_crawler/http/response.rb', line 115

def content(data = nil)
  if(data.blank?)
    data = readability.content
  else
    data = readability(data).content
  end
  Nokogiri::HTML(data).text.jagger_del_inter
end

#decoding_body ⇒ Object Also known as: dec

解压并转码 body 数据



5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
 
# File 'lib/http_crawler/http/response.rb', line 5

def decoding_body
  return @decoding_body if defined? @decoding_body

  # 数据解压
  case self.headers['Content-Encoding']
  when 'gzip' then
    @decoding_body = Zlib::GzipReader.new(StringIO.new(self.body.to_s), encoding: "ASCII-8BIT").read
  when 'br'
    @decoding_body = Brotli.inflate(self.body.to_s)
    # when 'deflate'
    #   # 可能错误代码 暂时没解决 deflate 编码格式
    #   @decoding_body = Zlib::Inflate.inflate(self.body.to_s)
  else
    @decoding_body = self.body.to_s
  end

  # 判断解压后数据编码格式

  # 从header取编码格式, self.headers['Content-Type'].to_s 是为了解决可能出现self.headers['Content-Type']是数组的情况
  encoding = self.headers['Content-Type'].to_s[/charset=([^, ;"]*)/, 1] if self.headers['Content-Type']

  # 从html中的 charset 取编码格式
  # 不能使用，因为 decoding_body 还未转码，直接使用可能报错: ArgumentError: invalid byte sequence in UTF-8
  # encoding = @decoding_body[/charset=([^, ;"]*)/, 1] unless encoding

  # 通过 CharDet 判断编码格式
  encoding = CharDet.detect(@decoding_body)["encoding"] unless encoding


  # 进行转码
  begin
    @decoding_body.force_encoding(encoding).encode!('utf-8',invalid: :replace) if encoding && encoding != @decoding_body.encoding
  rescue => e
    # 转码错误后再次使用 CharDet 判断编码格式后进行转码
    cd = CharDet.detect(@decoding_body)["encoding"]
    if (cd && cd != encoding)
      @decoding_body.force_encoding(cd).encode!('utf-8',invalid: :replace) if encoding != @decoding_body.encoding
    else
      # 还是转码错误则抛出源码转字符串内容
      self.body.to_s
    end
  end

end

#get_date(str) ⇒ Object 



135
136
137
138
139
140
141
142
143
144
145
146
147
148
 
# File 'lib/http_crawler/http/response.rb', line 135

def get_date(str)
  time = Time.now
  case str
  when /^(\d{1,2})小时前$/
    time = time - $1.to_i.hours
  when /^(\d{1,2})月(\d{1,2})日$/
    time = Time.local(time.year, $1.to_i, $2.to_i)
  when /^(\d{4})年(\d{1,2})月(\d{1,2})日$/
    time = Time.local($1.to_i, $2.to_i, $3.to_i)
  when /^(\d{1,2})月(\d{1,2})日[ ]{0,3}(\d{1,2}):(\d{1,2})$/ # 09月30日 12:04
    time = Time.local(time.year, $1.to_i, $2.to_i, $3.to_i, $4.to_i)
  end
  return time
end

#html(data = nil) ⇒ Nokogiri::HTML::Document

转换html格式

Returns:

  • (Nokogiri::HTML::Document) 


55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
 
# File 'lib/http_crawler/http/response.rb', line 55

def html(data = nil)

  if (data.blank? && defined? @html)
    # 如果 data 为空 并且 @html 有值，直接返回 @html
    return @html
  end

  # 如果data为空初始化为 self.dec
  data ||= self.dec
  if (Nokogiri::HTML::Document === data)
    @html = data
  else
    @html = Nokogiri::HTML(data)
  end
  @html

  return @html if defined? @html
  self.html = self.dec
  self.html
end

#json(data = nil) ⇒ Hash

转换json格式

Returns:

  • (Hash) 


79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
 
# File 'lib/http_crawler/http/response.rb', line 79

def json(data = nil)
  if (data.blank? && defined? @json)
    # 如果 data 为空 并且 @json 有值，直接返回 @json
    return @json
  end

  # 如果data为空初始化为 self.dec
  data ||= self.dec
  if (Hash === data)
    @json = data
  else
    @json = JSON.parse(data)
    @json = JSON.parse(@json) if String === @json
  end
  @json
end

#parsing(parameter = {}) ⇒ Object

解析 默认使用 json 的值



126
127
128
 
# File 'lib/http_crawler/http/response.rb', line 126

def parsing(parameter = {})
  self.json
end

#readability(data = nil) ⇒ Readability::Document

通过readability 解析数据

Returns:

  • (Readability::Document) 


98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
 
# File 'lib/http_crawler/http/response.rb', line 98

def readability(data = nil)
  if (data.blank? && defined? @readability)
    # 如果 data 为空 并且 @readability 有值，直接返回 @readability
    return @readability
  end

  # 如果data为空初始化为 self.dec
  data ||= self.dec
  if (Readability::Document === data)
    @readability = data
  else
    @readability = Readability::Document.new(data, {do_not_guess_encoding: true})
  end
  @readability
end

#results(parameter = {}) ⇒ Object

获取解析结果



131
132
133
 
# File 'lib/http_crawler/http/response.rb', line 131

def results(parameter = {})
  @results ||= parsing(parameter)
end

#validation_page? ⇒ Boolean

是否验证码界面

Returns:

  • (Boolean) 


159
160
161
162
163
164
165
166
167
168
169
170
 
# File 'lib/http_crawler/http/response.rb', line 159

def validation_page?
  # 正则匹配数组 validations 的所有匹配值
  validations.each do |regular|
    regular_num = decoding_body =~ regular
    if regular_num
      Rails.logger.warn("触发验证信息")
      Rails.logger.warn(decoding_body[regular_num..(regular_num + 300)])
      return true
    end
  end
  return false
end